diff -ru4NwbB libpng-1.5.10/Makefile.am libpng-1.6.0beta22/Makefile.am --- libpng-1.5.10/Makefile.am 2012-03-29 00:07:02.313855348 -0500 +++ libpng-1.6.0beta22/Makefile.am 2012-05-23 12:31:07.033265625 -0500 @@ -3,14 +3,9 @@ # PNGLIB_BASENAME= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ -# libpng does not follow GNU file name conventions - -# "color-tests" requires automake 1.11.1 or later. Enable it if you like, -# to get red "FAIL" and green "PASS" notations during tests. -# AUTOMAKE_OPTIONS = foreign color-tests -AUTOMAKE_OPTIONS = foreign +ACLOCAL_AMFLAGS = -I scripts # test programs - run on make check, make distcheck TESTS_ENVIRONMENT= srcdir=$(srcdir) check_PROGRAMS= pngtest @@ -18,12 +13,14 @@ pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la TESTS = test-pngtest.sh # Only do the following if the contrib directory is present. -check_PROGRAMS+= pngvalid +check_PROGRAMS+= pngvalid pngstest pngvalid_SOURCES = contrib/libtests/pngvalid.c +pngstest_SOURCES = contrib/libtests/pngstest.c pngvalid_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la -TESTS += test-pngvalid-simple.sh test-pngvalid-full.sh +pngstest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +TESTS += test-pngvalid-simple.sh test-pngvalid-full.sh test-pngstest.sh # man pages dist_man_MANS= libpng.3 libpngpf.3 png.5 @@ -45,10 +42,8 @@ endif nodist_libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = pnglibconf.h -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_CPPFLAGS = @LIBPNG_DEFINES@ - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS = -no-undefined -export-dynamic \ -version-number @PNGLIB_MAJOR@@PNGLIB_MINOR@:@PNGLIB_RELEASE@:0 if HAVE_LD_VERSION_SCRIPT @@ -85,16 +80,22 @@ CMakeLists.txt example.c libpng-manual.txt SCRIPT_CLEANFILES=scripts/*.out scripts/*.chk scripts/pnglibconf.dfn -CLEANFILES= dfn.c dfn?.out pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \ +CLEANFILES= *.tf? pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \ libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers libpng.sym \ - check.new pnglibconf.* symbols.new pngtest-log.txt \ + check.new pnglibconf.* pngprefix.h symbols.new pngtest-log.txt \ $(SCRIPT_CLEANFILES) MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \ config.sub configure depcomp install-sh ltmain.sh missing +# PNG_COPTS give extra options for the C compiler to be used on all compilation +# steps (unless targe_CFLAGS is specified; that will take precedence over +# AM_CFLAGS) +PNG_COPTS = @PNG_COPTS@ +AM_CFLAGS = ${PNG_COPTS} + # DFNCPP is normally just CPP - the C preprocessor - but on Solaris and maybe # other operating systems (NeXT?) the C preprocessor selected by configure # checks input tokens for validity - effectively it performs part of the ANSI-C # parsing - and therefore fails with the .df files. configure.ac has special @@ -109,19 +110,45 @@ $(PNGLIB_BASENAME)-config: libpng-config cp libpng-config $@ scripts/sym.out scripts/vers.out: png.h pngconf.h pnglibconf.h +scripts/prefix.out: png.h pngconf.h pnglibconf.out scripts/symbols.out: png.h pngconf.h $(srcdir)/scripts/pnglibconf.h.prebuilt libpng.sym: scripts/sym.out rm -f $@ cp $? $@ libpng.vers: scripts/vers.out rm -f $@ cp $? $@ + +if DO_PNG_PREFIX +# Rename functions in scripts/prefix.out with a PNG_PREFIX prefix. +# Rename macros in scripts/macro.lst from PNG_PREFIXpng_ to PNG_ (the actual +# implementation of the macro). +pnglibconf.h: pnglibconf.out scripts/prefix.out scripts/macro.lst + rm -f $@ + $(AWK) 's==0 && NR>1{print prev}\ + s==0{prev=$$0}\ + s==1{print "#define", $$1, "@PNG_PREFIX@" $$1}\ + s==2{print "#define @PNG_PREFIX@png_" $$1, "PNG_" $$1}\ + END{print prev}' s=0 pnglibconf.out s=1 scripts/prefix.out\ + s=2 ${srcdir}/scripts/macro.lst >pnglibconf.tf8 + mv pnglibconf.tf8 $@ + +pngprefix.h: scripts/intprefix.out + rm -f pngprefix.tf1 + $(AWK) '{print "#define", $$1, "@PNG_PREFIX@" $$1}' $? >pngprefix.tf1 + mv pngprefix.tf1 $@ +else pnglibconf.h: pnglibconf.out rm -f $@ cp $? $@ + +pngprefix.h: # is empty + :>$@ +endif + $(srcdir)/scripts/pnglibconf.h.prebuilt: @echo "Attempting to build $@" >&2 @echo "This is a machine generated file, but if you want to make" >&2 @echo "a new one simply make 'scripts/pnglibconf.out' and copy that" >&2 @@ -129,9 +156,9 @@ # The following is necessary to ensure that the local pnglibconf.h is used, not # an installed one (this can happen immediately after on a clean system if # 'make test' is the first thing the user does.) -contrib/libtests/pngvalid.o pngtest.o: pnglibconf.h +contrib/libtests/pngstest.o contrib/libtests/pngvalid.o pngtest.o: pnglibconf.h # We must use -DPNG_NO_USE_READ_MACROS here even when the library may actually # be built with PNG_USE_READ_MACROS; this prevents the read macros from # interfering with the symbol file format. @@ -139,53 +166,59 @@ -DPNGLIB_VERSION='@PNGLIB_VERSION@'\ -DSYMBOL_PREFIX='$(SYMBOL_PREFIX)'\ -DPNG_NO_USE_READ_MACROS -DPNG_BUILDING_SYMBOL_TABLE +if DO_PNG_PREFIX +SYMBOL_CFLAGS += -DPNG_PREFIX='@PNG_PREFIX@' +endif + .dfn.out: - rm -f $@ dfn.c dfn?.out + rm -f $@ $*.c $*.tf[123] test -d scripts || mkdir scripts - echo '#include "$<"' >dfn.c - $(DFNCPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) @LIBPNG_DEFINES@\ - $(CPPFLAGS) $(SYMBOL_CFLAGS) dfn.c > dfn1.out + echo '#include "$<"' >$*.c + $(DFNCPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES)\ + $(CPPFLAGS) $(SYMBOL_CFLAGS) $*.c > $*.tf1 $(SED) -n -e 's|^.*PNG_DEFN_MAGIC *-\(.*\)- *PNG_DEFN_END.*$$|\1|p'\ - dfn1.out >dfn2.out - $(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' dfn2.out >dfn3.out - rm -f dfn.c dfn[12].out - mv dfn3.out $@ + $*.tf1 >$*.tf2 + $(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' $*.tf2 >$*.tf3 + rm -f $*.c $*.tf[12] + mv $*.tf3 $@ # The .dfn file for pnglibconf.h is machine generated pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h pngusr.dfa $(DFA_XTRA) - rm -f $@ dfn?.out - $(AWK) -f ${srcdir}/scripts/options.awk out=dfn1.out version=search\ + rm -f $@ $*.tf[45] + $(AWK) -f ${srcdir}/scripts/options.awk out=$*.tf4 version=search\ ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\ ${srcdir}/pngusr.dfa $(DFA_XTRA) 1>&2 - $(AWK) -f ${srcdir}/scripts/options.awk out=dfn2.out dfn1.out 1>&2 - rm dfn1.out - mv dfn2.out $@ + $(AWK) -f ${srcdir}/scripts/options.awk out=$*.tf5 $*.tf4 1>&2 + rm $*.tf4 + mv $*.tf5 $@ # Symbol checks (.def and .out files should match) scripts/symbols.chk: scripts/checksym.awk scripts/symbols.def scripts/symbols.out + .out.chk: - rm -f $@ symbols.new + rm -f $@ $*.new $(AWK) -f ${srcdir}/scripts/checksym.awk ${srcdir}/scripts/${*F}.def\ - $< >&2 - mv symbols.new $@ + of="$*.new" $< >&2 + mv $*.new $@ # used on demand to regenerate the standard header, CPPFLAGS should # be empty - no non-standard defines scripts/pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h - rm -f $@ dfn?.out + rm -f $@ pnglibconf.tf[67] test -z "$(CPPFLAGS)" echo "com @PNGLIB_VERSION@ STANDARD API DEFINITION" |\ - $(AWK) -f ${srcdir}/scripts/options.awk out=dfn1.out logunsupported=1 - version=search ${srcdir}/pngconf.h -\ + $(AWK) -f ${srcdir}/scripts/options.awk out=pnglibconf.tf6\ + logunsupported=1 version=search ${srcdir}/pngconf.h -\ ${srcdir}/scripts/pnglibconf.dfa 1>&2 - $(AWK) -f ${srcdir}/scripts/options.awk out=dfn2.out dfn1.out 1>&2 - rm dfn1.out - mv dfn2.out $@ + $(AWK) -f ${srcdir}/scripts/options.awk out=pnglibconf.tf7\ + pnglibconf.tf6 1>&2 + rm pnglibconf.tf6 + mv pnglibconf.tf7 $@ $(libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_OBJECTS): png.h pngconf.h \ - pnglibconf.h pngpriv.h pngdebug.h pnginfo.h pngstruct.h + pnglibconf.h pngpriv.h pngdebug.h pnginfo.h pngstruct.h pngprefix.h test: check-am # Extra checks diff -ru4NwbB libpng-1.5.10/autogen.sh libpng-1.6.0beta22/autogen.sh --- libpng-1.5.10/autogen.sh 2012-03-29 00:07:02.325600990 -0500 +++ libpng-1.6.0beta22/autogen.sh 2012-05-23 12:31:07.045695025 -0500 @@ -1,34 +1,219 @@ #! /bin/sh -# a quick hack script to generate necessary files from -# auto* tools. # -# WARNING: if you run this you will change the versions -# of the tools which are used and, maybe, required! +# Run 'autoreconf' to build 'configure', 'Makefile.in' and other configure +# control files. +# +# The first time this is run on a GIT checkout the only files that exist are +# configure.ac and Makefile.am; all of the autotools support scripts are +# missing. They are instantiated with autoreconf --force --install. +# +# For regular ("tarball") distributions all the files should exist. We do not +# want them to be updated *under any circumstances*. It should never be +# necessary to rune autogen.sh because ./configure --enable-maintainer-mode says +# what to do if Makeile.am or configure.ac are changed. +# +# It is *probably* OK to update the files on a GIT checkout, because they have +# come from the local tools, but leave that to the user who is assumed to know +# whether it is ok or required. +# +# This script is intended to work without arguments, there are, however, hidden +# arguments for (a) use while testing the script and (b) to fix up systems that +# have been broken. If (b) is required the script prompts for the correct +# options. For this reason the options are *NOT* documented in the help; this +# is deliberate; UTSL. +# +clean= +maintainer= +while test $# -gt 0 +do + case "$1" in + --maintainer) + maintainer=1;; + + --clean) + clean=1;; + + *) + exec >&2 + echo "$0: usage: ./autogen.sh" + if test -d .git + then + echo " ./autogen.sh generates the configure script and" + echo " Makefile.in, or refreshes them after changes to Makefile.am" + echo " or configure.ac. You may prefer to just run autoreconf." + elif test -z "$maintainer" + then + echo " DO NOT RUN THIS SCRIPT." + echo " If you need to change Makefile.am or configure.ac then you" + echo " also need to run ./configure --enable-maintainer-mode and" + echo " use the appropriate autotools, *NOT* this script, to update" + echo " everything, please check the documentation of autoreconf." + echo " WARNING: libpng is intentionally generated with a known," + echo " fixed, set of autotools. It is known *NOT* to work with" + echo " the collection of autotools distributed on highly reputable" + echo " operating systems." + echo " Remember: autotools is GNU software, you are expected to" + echo " pay for support." + else + echo " You have run autogen.sh with --maintainer enabled and you" + echo " are not using a GIT distribution, then you have given an" + echo " unrecognized argument. This is not good. --maintainer" + echo " switches off any assumptions that you might not know what" + echo " you are doing." + fi + exit 1;; + esac + + shift +done +# +# First check for a set of the autotools files; if absent then this is assumed +# to be a GIT version and the local autotools must be used. If present this +# is a tarball distribution and the script should not be used. If partially +# present bad things are happening. +# +# The autotools generated files: +libpng_autotools_files="Makefile.in aclocal.m4 config.guess config.h.in\ + config.sub configure depcomp install-sh ltmain.sh missing" +# +# These are separate because 'maintainer-clean' does not remove them. +libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\ + scripts/ltsugar.m4 scripts/ltversion.m4 scripts/lt~obsolete.m4" + +libpng_autotools_dirs="autom4te.cache" # not required +# +# The configure generated files: +libpng_configure_files="Makefile config.h config.log config.status\ + libpng-config libpng.pc libtool stamp-h1" + +libpng_configure_dirs=".deps" +# +# We must remove the configure generated files as well as the autotools +# generated files if autotools are regenerated because otherwise if configure +# has been run without "--enable-maintainer-mode" make can do a partial update +# of Makefile. These functions do the two bits of cleaning. +clean_autotools(){ + rm -rf $libpng_autotools_files $libpng_libtool_files $libpng_autotools_dirs +} + +clean_configure(){ + rm -rf $libpng_configure_files $libpng_configure_dirs +} +# +# Clean: remove everything (this is to help with testing) +if test -n "$clean" +then + clean_configure + if test -n "$maintainer" + then + clean_autotools + fi + + exit 0 +fi +# +# Validate the distribution. +libpng_autotools_file_found= +libpng_autotools_file_missing= +for file in $libpng_autotools_files +do + if test -f "$file" + then + libpng_autotools_file_found=1 + else + libpng_autotools_file_missing=1 + fi +done +# +# Presence of one of these does not *invalidate* missing, but absence +# invalidates found. +for file in $libpng_libtool_files +do + if test ! -f "$file" + then + libpng_autotools_file_missing=1 + fi +done +# +# The cache directory doesn't matter - it will be regenerated and does not exist +# anyway in a tarball. +# +# Either everything is missing or everything is there, the --maintainer option +# just changes this so that the mode is set to generate all the files. +mode= +if test -z "$libpng_autotools_file_found" -o -n "$maintainer" +then + mode="autoreconf" +else + if test -n "$libpng_autotools_file_missing" + then + mode="broken" + else + mode="configure" + fi +fi +# +# So: +case "$mode" in + autoreconf) + # Clean in case configure files exist + clean_configure + clean_autotools + # Everything must be initialized, so use --force + if autoreconf --warnings=all --force --install + then + missing= + for file in $libpng_autotools_files + do + test -f "$file" || missing=1 + done + # ignore the cache directory + test -z "$missing" || { + exec >&2 + echo "autoreconf was run, but did not produce all the expected" + echo "files. It is likely that your autotools installation is" + echo "not compatible with that expected by libpng." + exit 1 + } + else + exec >&2 + echo "autoreconf failed: your version of autotools is incompatible" + echo "with this libpng version. Please use a distributed archive" + echo "(which includes the autotools generated files) and run configure" + echo "instead." + exit 1 + fi;; -# You can define your own replacements in your environment. -# $AUTOCONF, $AUTOMAKE, $AUTOHEADER, $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE + configure) + if test -d .git + then + exec >&2 + echo "ERROR: running autoreconf on an initialized sytem" + echo " This is not necessary; it is only necessary to remake the" + echo " autotools generated files if Makefile.am or configure.ac" + echo " change and make does the right thing with:" + echo + echo " ./configure --enable-maintainer-mode." + echo + echo " You can run autoreconf yourself if you don't like maintainer" + echo " mode and you can also just run autoreconf -f -i to initialize" + echo " everything in the first place; this script is only for" + echo " compatiblity with prior releases." + exit 1 + else + exec >&2 + echo "autogen.sh is intended only to generate 'configure' on systems" + echo "that do not have it. You have a complete 'configure', if you" + echo "need to change Makefile.am or configure.ac you also need to" + echo "run configure with the --enable-maintainer-mode option." + exit 1 + fi;; -touch Makefile.am configure.ac -{ - LT=${LIBTOOLIZE-libtoolize} - echo "running $LT" >&2 - $LT --force --copy --automake -} && { - AL=${ACLOCAL-aclocal} - echo "running $AL" >&2 - $AL -} && { - AH=${AUTOHEADER-autoheader} - echo "running $AH [ignore the warnings]" >&2 - $AH -} && { - AM=${AUTOMAKE-automake} - echo "running $AM" >&2 - $AM --force-missing --foreign -a -c -} && { - AC=${AUTOCONF-autoconf} - echo "running $AC" >&2 - $AC -} && - echo "autogen complete" >&2 || - echo "ERROR: autogen.sh failed, autogen is incomplete" >&2 + broken) + exec >&2 + echo "Your system has a partial set of autotools generated files." + echo "autogen.sh is unable to proceed. The full set of files is" + echo "contained in the distribution archive and you do not need to run" + echo "autogen.sh if you use it." + exit 1;; +esac diff -ru4NwbB libpng-1.5.10/configure.ac libpng-1.6.0beta22/configure.ac --- libpng-1.5.10/configure.ac 2012-03-29 00:07:02.320295264 -0500 +++ libpng-1.6.0beta22/configure.ac 2012-05-23 12:31:07.039845144 -0500 @@ -13,62 +13,107 @@ dnl This is here to prevent earlier autoconf from being used, it dnl should not be necessary to regenerate configure if the time dnl stamps are correct -AC_PREREQ(2.59) +AC_PREREQ([2.68]) dnl Version number stuff here: AC_INIT([libpng], [1.6.0beta22], [png-mng-implement@lists.sourceforge.net]) -AM_INIT_AUTOMAKE -dnl stop configure from automagically running automake +AC_CONFIG_MACRO_DIR([scripts]) + +# libpng does not follow GNU file name conventions (hence 'foreign') +# color-tests requires automake 1.11 or later +# silent-rules requires automake 1.11 or later +# dist-xz requires automake 1.11 or later +# 1.11.1 fixes a security issue in 1.11 +AM_INIT_AUTOMAKE([1.11.1 foreign dist-xz dist-bzip2 color-tests silent-rules]) +# was: +# AM_INIT_AUTOMAKE AM_MAINTAINER_MODE +dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later +dnl version; aclocal.m4 will generate a failure if you use a prior version of +dnl automake, so the following is not necessary (and is not defined anyway): +dnl AM_PREREQ([1.11.2]) +dnl stop configure from automagically running automake + PNGLIB_VERSION=1.6.0beta22 PNGLIB_MAJOR=1 -PNGLIB_MINOR=5 +PNGLIB_MINOR=6 PNGLIB_RELEASE=%RELEASE% dnl End of version number stuff AC_CONFIG_SRCDIR([pngget.c]) -AM_CONFIG_HEADER(config.h) +AC_CONFIG_HEADERS([config.h]) # Checks for programs. AC_LANG([C]) AC_PROG_CC AM_PROG_AS -AC_PROG_LD +LT_PATH_LD AC_PROG_CPP AC_CHECK_TOOL(SED, sed, :) AC_CHECK_TOOL(AWK, awk, :) AC_PROG_INSTALL AC_PROG_LN_S AC_PROG_MAKE_SET + +dnl libtool/libtoolize; version 2.4.2 is the tested version, this or any +dnl compatible later version may be used LT_INIT([win32-dll]) +LT_PREREQ([2.4.2]) # On Solaris 10 and 12 CPP gets set to cc -E, however this still # does some input parsing. We need strict ANSI-C style tokenization, # check this: AC_REQUIRE_CPP AC_MSG_CHECKING([for a C preprocessor that does not parse its input]) -AC_TRY_CPP([1.5.0 16BIT], +AC_PREPROC_IFELSE([AC_LANG_SOURCE([[1.1.1 16BIT]])], [DFNCPP="$CPP"], [DFNCPP="" sav_CPP="$CPP" - for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp"; do - AC_TRY_CPP([1.5.0 16BIT], + for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp" + do + AC_PREPROC_IFELSE([AC_LANG_SOURCE([[1.1.1 16BIT]])], [DFNCPP="$CPP"] [break],,) done - CPP="$sav_CPP"]) + CPP="$sav_CPP" + ]) if test -n "$DFNCPP"; then AC_MSG_RESULT([$DFNCPP]) AC_SUBST(DFNCPP) else AC_MSG_FAILURE([not found], 1) fi +# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it +# checks the compiler with a program that generates a warning), add the +# following option to deal with this +AC_ARG_VAR(PNG_COPTS, + [additional flags for the C compiler, use this for options that would] + [cause configure itself to fail]) +AC_ARG_ENABLE(werror, + AS_HELP_STRING([[[--enable-werror[=OPT]]]], + [Pass -Werror or the given argument to the compiler if it is supported]), + [test "$enable_werror" = "yes" && enable_werror="-Werror" + if test "$enable_werror" != "no"; then + sav_CFLAGS="$CFLAGS" + CFLAGS="$enable_werror $CFLAGS" + AC_MSG_CHECKING([if the compiler allows $enable_werror]) + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([ + [int main(int argc, char **argv){] + [return argv[argc-1][0];] + [}]])], + AC_MSG_RESULT(yes) + PNG_COPTS="$PNG_COPTS $enable_werror", + AC_MSG_RESULT(no)) + CFLAGS="$sav_CFLAGS" + fi],) + # Checks for header files. AC_HEADER_STDC AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h]) @@ -79,29 +124,24 @@ AC_C_RESTRICT # Checks for library functions. AC_FUNC_STRTOD -AC_CHECK_FUNCS([memset], , AC_ERROR([memset not found in libc])) -AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_ERROR([cannot find pow])) ) +AC_CHECK_FUNCS([memset], , AC_MSG_ERROR(memset not found in libc)) +AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) ) AC_ARG_WITH(zlib-prefix, - AC_HELP_STRING([--with-zlib-prefix], + AS_HELP_STRING([[[--with-zlib-prefix]]], [prefix that may have been used in installed zlib]), [ZPREFIX=${withval}], [ZPREFIX='z_']) AC_CHECK_LIB(z, zlibVersion, , - AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , - AC_ERROR([zlib not installed]))) + AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed))) # The following is for pngvalid, to ensure it catches FP errors even on # platforms that don't enable FP exceptions, the function appears in the math # library (typically), it's not an error if it is not found. AC_CHECK_LIB([m], [feenableexcept]) AC_CHECK_FUNCS([feenableexcept]) -LIBPNG_DEFINES=-DPNG_CONFIGURE_LIBPNG -LIBPNG_DEFINES=$LIBPNG_DEFINES -AC_SUBST(LIBPNG_DEFINES) - AC_MSG_CHECKING([if using Solaris linker]) SLD=`$LD --version 2>&1 | grep Solaris` if test "$SLD"; then have_solaris_ld=yes @@ -160,43 +200,55 @@ # Additional arguments (and substitutions) # Allow the pkg-config directory to be set AC_ARG_WITH(pkgconfigdir, - AC_HELP_STRING([--with-pkgconfigdir], + AS_HELP_STRING([[[--with-pkgconfigdir]]], [Use the specified pkgconfig dir (default is libdir/pkgconfig)]), [pkgconfigdir=${withval}], [pkgconfigdir='${libdir}/pkgconfig']) AC_SUBST([pkgconfigdir]) -AC_MSG_NOTICE([pkgconfig directory is ${pkgconfigdir}]) +AC_MSG_NOTICE([[pkgconfig directory is ${pkgconfigdir}]]) # Make the *-config binary config scripts optional AC_ARG_WITH(binconfigs, - AC_HELP_STRING([--with-binconfigs], + AS_HELP_STRING([[[--with-binconfigs]]], [Generate shell libpng-config scripts as well as pkg-config data] [@<:@default=yes@:>@]), [if test "${withval}" = no; then binconfigs= - AC_MSG_NOTICE([libpng-config scripts will not be built]) + AC_MSG_NOTICE([[libpng-config scripts will not be built]]) else binconfigs='${binconfigs}' fi], [binconfigs='${binconfigs}']) AC_SUBST([binconfigs]) +# Support for prefixes to the API function names; this will generate defines +# at the start of the build to rename exported library functions +AC_ARG_WITH(libpng-prefix, + AS_HELP_STRING([[[--with-libpng-prefix]]], + [prefix libpng exported function (API) names with the given value]), + [if test "${withval:-no}" != "no"; then + AC_SUBST([PNG_PREFIX], [${withval}]) + fi]) +AM_CONDITIONAL([DO_PNG_PREFIX], [test "${with_libpng_prefix:-no}" != "no"]) + # Because GCC by default assembles code with an executable stack, even though it # compiles C code with a non-executable stack, it is necessary to do a fixup # here (this may by GCC specific) AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack]) AC_ARG_ENABLE([arm-neon], - AC_HELP_STRING([--enable-arm-neon], [Enable ARM NEON optimizations]), - [if test "${enableval}" = yes; then + AS_HELP_STRING([[[--enable-arm-neon]]], [Enable ARM NEON optimizations]), + [if test "${enableval}" = "yes"; then AC_DEFINE([PNG_ARM_NEON], [1], [Enable ARM NEON optimizations]) AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [1], [Align row buffers]) fi]) AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" = yes]) +AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]]) + # Config files, substituting as above AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in]) AC_CONFIG_FILES([libpng-config:libpng-config.in], [chmod +x libpng-config]) diff -ru4NwbB libpng-1.5.10/contrib/examples/README.txt libpng-1.6.0beta22/contrib/examples/README.txt --- libpng-1.5.10/contrib/examples/README.txt 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/examples/README.txt 2011-11-25 06:25:01.000000000 -0600 @@ -0,0 +1,24 @@ + +This directory (contrib/examples) contains examples of libpng usage. + +NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY. + +To the extent possible under law, the authors have waived all copyright and +related or neighboring rights to this work. This work is published from: +United States. + +The files may be used freely in any way. The intention is that appropriate +parts of the files be used in other libpng-using programs without any need for +the authors of the using code to seek copyright or license from the original +authors. + +The source code and comments in this directory are the original work of the +people named below. No other person or organization has made contributions to +the work in this directory. + +ORIGINAL AUTHORS + The following people have contributed to the code in this directory. None + of the people below claim any rights with regard to the contents of this + directory. + + John Bowler diff -ru4NwbB libpng-1.5.10/contrib/examples/iccfrompng.c libpng-1.6.0beta22/contrib/examples/iccfrompng.c --- libpng-1.5.10/contrib/examples/iccfrompng.c 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/examples/iccfrompng.c 2011-11-25 06:25:09.000000000 -0600 @@ -0,0 +1,180 @@ +/*- iccfrompng + * + * COPYRIGHT: Written by John Cunningham Bowler, 2011. + * To the extent possible under law, the author has waived all copyright and + * related or neighboring rights to this work. This work is published from: + * United States. + * + * Extract any icc profiles found in the given PNG files. This is a simple + * example of a program which extracts information from the header of a PNG file + * without processing the image. Notice that some header information may occur + * after the image data, textual data and comments are an example; the approach + * in this file won't work reliably for such data because it only looks for the + * information in the section of the file that preceeds the image data. + * + * Compile and link against libpng and zlib, plus anything else required on the + * system you use. + * + * To use supply a list of PNG files containing iCCP chunks, the chunks will be + * extracted to a similarly named file with the extension replaced by 'icc', + * which will be overwritten without warning. + */ +#include +#include +#include +#include + +#include + +static int verbose = 1; +static png_byte no_profile[] = "no profile"; + +static png_bytep +extract(FILE *fp, png_uint_32 *proflen) +{ + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); + png_infop info_ptr = NULL; + png_bytep result = NULL; + + /* Initialize for error or no profile: */ + *proflen = 0; + + if (png_ptr == NULL) + { + fprintf(stderr, "iccfrompng: version library mismatch?\n"); + return 0; + } + + if (setjmp(png_jmpbuf(png_ptr))) + { + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + return 0; + } + + png_init_io(png_ptr, fp); + + info_ptr = png_create_info_struct(png_ptr); + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + png_read_info(png_ptr, info_ptr); + + { + png_charp name; + int compression_type; + png_bytep profile; + + if (png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, &profile, + proflen) & PNG_INFO_iCCP) + { + result = malloc(*proflen); + if (result != NULL) + memcpy(result, profile, *proflen); + + else + png_error(png_ptr, "OOM allocating profile buffer"); + } + + else + result = no_profile; + } + + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + return result; +} + +static int +extract_one_file(const char *filename) +{ + int result = 0; + FILE *fp = fopen(filename, "rb"); + + if (fp != NULL) + { + png_uint_32 proflen = 0; + png_bytep profile = extract(fp, &proflen); + + if (profile != NULL && profile != no_profile) + { + size_t len; + char *output; + + { + const char *ep = strrchr(filename, '.'); + + if (ep != NULL) + len = ep-filename; + + else + len = strlen(filename); + } + + output = malloc(len + 5); + if (output != NULL) + { + FILE *of; + + memcpy(output, filename, len); + strcpy(output+len, ".icc"); + + of = fopen(output, "wb"); + if (of != NULL) + { + if (fwrite(profile, proflen, 1, of) == 1 && + fflush(of) == 0 && + fclose(of) == 0) + { + if (verbose) + printf("%s -> %s\n", filename, output); + /* Success return */ + result = 1; + } + + else + { + fprintf(stderr, "%s: error writing profile\n", output); + if (remove(output)) + fprintf(stderr, "%s: could not remove file\n", output); + } + } + + else + fprintf(stderr, "%s: failed to open output file\n", output); + + free(output); + } + + else + fprintf(stderr, "%s: OOM allocating string!\n", filename); + + free(profile); + } + + else if (verbose && profile == no_profile) + printf("%s has no profile\n", filename); + } + + else + fprintf(stderr, "%s: could not open file\n", filename); + + return result; +} + +int +main(int argc, char **argv) +{ + int i; + int extracted = 0; + + for (i=1; i +#include +#include /* required for error handling */ + +/* Normally use here to get the installed libpng, but this is done to + * ensure the code picks up the local libpng implementation: + */ +#include "../../png.h" + +/* Return component 'c' of pixel 'x' from the given row. */ +static unsigned int +component(png_const_bytep row, png_uint_32 x, unsigned int c, + unsigned int bit_depth, unsigned int channels) +{ + /* PNG images can be up to 2^31 pixels wide, but this means they can be up to + * 2^37 bits wide (for a 64-bit pixel - the largest possible) and hence 2^34 + * bytes wide. Since the row fitted into memory, however, the following must + * work: + */ + png_uint_32 bit_offset_hi = bit_depth * ((x >> 6) * channels + c); + png_uint_32 bit_offset_lo = bit_depth * ((x & 0x3f) * channels + c); + + row = (png_const_bytep)(((PNG_CONST png_byte (*)[8])row) + bit_offset_hi); + row += bit_offset_lo >> 3; + bit_offset_lo &= 0x07; + + /* PNG pixels are packed into bytes to put the first pixel in the highest + * bits of the byte and into two bytes for 16-bit values with the high 8 bits + * first, so: + */ + switch (bit_depth) + { + case 1: return (row[0] >> (7-bit_offset_lo)) & 0x01; + case 2: return (row[0] >> (6-bit_offset_lo)) & 0x03; + case 4: return (row[0] >> (4-bit_offset_lo)) & 0x0f; + case 8: return row[0]; + case 16: return (row[0] << 8) + row[1]; + default: + /* This should never happen, it indicates a bug in this program or in + * libpng itself: + */ + fprintf(stderr, "pngpixel: invalid bit depth %u\n", bit_depth); + exit(1); + } +} + +/* Print a pixel from a row returned by libpng; determine the row format, find + * the pixel, and print the relevant information to stdout. + */ +static void +print_pixel(png_structp png_ptr, png_infop info_ptr, png_const_bytep row, + png_uint_32 x) +{ + PNG_CONST unsigned int bit_depth = png_get_bit_depth(png_ptr, info_ptr); + + switch (png_get_color_type(png_ptr, info_ptr)) + { + case PNG_COLOR_TYPE_GRAY: + printf("GRAY %u\n", component(row, x, 0, bit_depth, 1)); + return; + + /* The palette case is slightly more difficult - the palette and, if + * present, the tRNS ('transparency', though the values are really + * opacity) data must be read to give the full picture: + */ + case PNG_COLOR_TYPE_PALETTE: + { + PNG_CONST unsigned int index = component(row, x, 0, bit_depth, 1); + png_colorp palette = NULL; + int num_palette = 0; + + if ((png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette) & + PNG_INFO_PLTE) && num_palette > 0 && palette != NULL) + { + png_bytep trans_alpha = NULL; + int num_trans = 0; + if ((png_get_tRNS(png_ptr, info_ptr, &trans_alpha, &num_trans, + NULL) & PNG_INFO_tRNS) && num_trans > 0 && + trans_alpha != NULL) + printf("INDEXED %u = %d %d %d %d\n", index, + palette[index].red, palette[index].green, + palette[index].blue, + index < num_trans ? trans_alpha[index] : 255); + + else /* no transparency */ + printf("INDEXED %u = %d %d %d\n", index, + palette[index].red, palette[index].green, + palette[index].blue); + } + + else + printf("INDEXED %u = invalid index\n", index); + } + return; + + case PNG_COLOR_TYPE_RGB: + printf("RGB %u %u %u\n", component(row, x, 0, bit_depth, 3), + component(row, x, 1, bit_depth, 3), + component(row, x, 2, bit_depth, 3)); + return; + + case PNG_COLOR_TYPE_GRAY_ALPHA: + printf("GRAY+ALPHA %u %u\n", component(row, x, 0, bit_depth, 2), + component(row, x, 1, bit_depth, 2)); + return; + + case PNG_COLOR_TYPE_RGB_ALPHA: + printf("RGBA %u %u %u %u\n", component(row, x, 0, bit_depth, 4), + component(row, x, 1, bit_depth, 4), + component(row, x, 2, bit_depth, 4), + component(row, x, 3, bit_depth, 4)); + return; + + default: + png_error(png_ptr, "invalid color type"); + } +} + +int main(int argc, const char **argv) +{ + /* This program uses the default, based, libpng error handling + * mechanism, therefore any local variable that exists before the call to + * setjmp and is changed after the call to setjmp returns successfully must + * be declared with 'volatile' to ensure that their values don't get + * destroyed by longjmp: + */ + volatile int result = 1/*fail*/; + + if (argc == 4) + { + long x = atol(argv[1]); + long y = atol(argv[2]); + FILE *f = fopen(argv[3], "rb"); + volatile png_bytep row = NULL; + + if (f != NULL) + { + /* libpng requires a callback function for handling errors; this + * callback must not return. The default callback function uses a + * stored style jmp_buf which is held in a png_struct and + * writes error messages to stderr. Creating the png_struct is a + * little tricky; just copy the following code. + */ + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, + NULL, NULL, NULL); + + if (png_ptr != NULL) + { + png_infop info_ptr = png_create_info_struct(png_ptr); + + if (info_ptr != NULL) + { + /* Declare stack variables to hold pointers to locally allocated + * data. + */ + + /* Initialize the error control buffer: */ + if (setjmp(png_jmpbuf(png_ptr)) == 0) + { + png_uint_32 width, height; + int bit_depth, color_type, interlace_method, + compression_method, filter_method; + png_bytep row_tmp; + + /* Now associate the recently opened (FILE*) with the default + * libpng initialization functions. Sometimes libpng is + * compiled without stdio support (it can be difficult to do + * in some environments); in that case you will have to write + * your own read callback to read data from the (FILE*). + */ + png_init_io(png_ptr, f); + + /* And read the first part of the PNG file - the header and + * all the information up to the first pixel. + */ + png_read_info(png_ptr, info_ptr); + + /* This fills in enough information to tell us the width of + * each row in bytes, allocate the appropriate amount of + * space. In this case png_malloc is used - it will not + * return if memory isn't available. + */ + row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, + info_ptr)); + + /* To avoid the overhead of using a volatile auto copy row_tmp + * to a local here - just use row for the png_free below. + */ + row_tmp = row; + + /* All the information we need is in the header is returned by + * png_get_IHDR, if this fails we can now use 'png_error' to + * signal the error and return control to the setjmp above. + */ + if (png_get_IHDR(png_ptr, info_ptr, &width, &height, + &bit_depth, &color_type, &interlace_method, + &compression_method, &filter_method)) + { + int passes, pass; + + /* png_set_interlace_handling returns the number of + * passes required as well as turning on libpng's + * handling, but since we do it ourselves this is + * necessary: + */ + switch (interlace_method) + { + case PNG_INTERLACE_NONE: + passes = 1; + break; + + case PNG_INTERLACE_ADAM7: + passes = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + png_error(png_ptr, "pngpixel: unknown interlace"); + } + + /* Now read the pixels, pass-by-pass, row-by-row: */ + png_start_read_image(png_ptr); + + for (pass=0; pass +#include +#include +#include + +/* Normally use here to get the installed libpng, but this is done to + * ensure the code picks up the local libpng implementation: + */ +#include "../../png.h" + +int main(int argc, const char **argv) +{ + int result = 1; + + if (argc == 3) + { + png_image image; + + memset(&image, 0, sizeof image); + + if (png_image_begin_read_from_file(&image, argv[1])) + { + png_bytep buffer; + + /* Change this to try different formats! */ + image.format = PNG_FORMAT_RGBA; + + buffer = malloc(PNG_IMAGE_SIZE(image)); + + if (buffer != NULL) + { + if (png_image_finish_read(&image, NULL/*background*/, buffer, + 0/*row_stride*/)) + { + if (png_image_write_to_file(&image, argv[2], + 0/*convert_to_8bit*/, buffer, 0/*row_stride*/)) + result = 0; + + else + fprintf(stderr, "pngtopng: write %s: %s\n", argv[2], + image.message); + + free(buffer); + } + + else + { + fprintf(stderr, "pngtopng: read %s: %s\n", argv[1], + image.message); + + /* This is the only place where a 'free' is required; libpng does + * the cleanup on error and success, but in this case we couldn't + * complete the read because of running out of memory. + */ + png_image_free(&image); + } + } + + else + fprintf(stderr, "pngtopng: out of memory: %lu bytes\n", + (unsigned long)PNG_IMAGE_SIZE(image)); + } + + else + /* Failed to read the first argument: */ + fprintf(stderr, "pngtopng: %s: %s\n", argv[1], image.message); + } + + else + /* Wrong number of arguments */ + fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n"); + + return result; +} diff -ru4NwbB libpng-1.5.10/contrib/gregbook/Makefile.sgi libpng-1.6.0beta22/contrib/gregbook/Makefile.sgi --- libpng-1.5.10/contrib/gregbook/Makefile.sgi 2012-03-29 00:06:54.766127473 -0500 +++ libpng-1.6.0beta22/contrib/gregbook/Makefile.sgi 2012-05-23 12:30:56.366637168 -0500 @@ -22,11 +22,11 @@ # macros -------------------------------------------------------------------- -PNGINC = -I/usr/local/include/libpng15 -PNGLIB = -L/usr/local/lib -lpng15 # dynamically linked against libpng -#PNGLIB = /usr/local/lib/libpng15.a # statically linked against libpng +PNGINC = -I/usr/local/include/libpng16 +PNGLIB = -L/usr/local/lib -lpng16 # dynamically linked against libpng +#PNGLIB = /usr/local/lib/libpng16.a # statically linked against libpng # or: #PNGINC = -I../.. #PNGLIB = -L../.. -lpng #PNGLIB = ../../libpng.a diff -ru4NwbB libpng-1.5.10/contrib/gregbook/Makefile.unx libpng-1.6.0beta22/contrib/gregbook/Makefile.unx --- libpng-1.5.10/contrib/gregbook/Makefile.unx 2012-03-29 00:06:54.777037860 -0500 +++ libpng-1.6.0beta22/contrib/gregbook/Makefile.unx 2012-05-23 12:30:56.376304209 -0500 @@ -25,16 +25,16 @@ # macros -------------------------------------------------------------------- #PNGDIR = /usr/local/lib -#PNGINC = -I/usr/local/include/libpng15 -#PNGLIBd = -L$(PNGDIR) -lpng15 # dynamically linked, installed libpng -#PNGLIBs = $(PNGDIR)/libpng15.a # statically linked, installed libpng +#PNGINC = -I/usr/local/include/libpng16 +#PNGLIBd = -L$(PNGDIR) -lpng16 # dynamically linked, installed libpng +#PNGLIBs = $(PNGDIR)/libpng16.a # statically linked, installed libpng # or: PNGDIR = ../..# this one is for libpng-x.y.z/contrib/gregbook builds #PNGDIR = ../libpng PNGINC = -I$(PNGDIR) -PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng15 # dynamically linked +PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng16 # dynamically linked PNGLIBs = $(PNGDIR)/libpng.a # statically linked, local libpng ZDIR = /usr/local/lib #ZDIR = /usr/lib64 diff -ru4NwbB libpng-1.5.10/contrib/gregbook/readpng.c libpng-1.6.0beta22/contrib/gregbook/readpng.c --- libpng-1.5.10/contrib/gregbook/readpng.c 2012-03-29 00:06:54.818180544 -0500 +++ libpng-1.6.0beta22/contrib/gregbook/readpng.c 2012-05-23 12:30:56.416082359 -0500 @@ -54,10 +54,11 @@ ---------------------------------------------------------------------------*/ #include #include +#include -#include "png.h" /* libpng header; includes zlib.h */ +#include "png.h" /* libpng header */ #include "readpng.h" /* typedefs, common macros, public prototypes */ /* future versions of libpng will provide this macro: */ #ifndef png_jmpbuf diff -ru4NwbB libpng-1.5.10/contrib/gregbook/writepng.c libpng-1.6.0beta22/contrib/gregbook/writepng.c --- libpng-1.5.10/contrib/gregbook/writepng.c 2012-03-29 00:06:54.962055667 -0500 +++ libpng-1.6.0beta22/contrib/gregbook/writepng.c 2012-05-23 12:30:56.552202246 -0500 @@ -54,10 +54,11 @@ ---------------------------------------------------------------------------*/ #include /* for exit() prototype */ +#include -#include "png.h" /* libpng header; includes zlib.h and setjmp.h */ +#include "png.h" /* libpng header, includes setjmp.h */ #include "writepng.h" /* typedefs, common macros, public prototypes */ /* local prototype */ diff -ru4NwbB libpng-1.5.10/contrib/libtests/gentests.sh libpng-1.6.0beta22/contrib/libtests/gentests.sh --- libpng-1.5.10/contrib/libtests/gentests.sh 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/libtests/gentests.sh 2012-05-23 12:30:58.769369238 -0500 @@ -0,0 +1,102 @@ +#!/bin/sh +# +# Copyright (c) 2012 John Cunningham Bowler +# +# Last changed in libpng 1.6.0 [(PENDING RELEASE)] +# +# This code is released under the libpng license. +# For conditions of distribution and use, see the disclaimer +# and license in png.h +# +# Generate a set of PNG test images. The images are generated in a +# sub-directory called 'tests' by default, however a command line argument will +# change that name. The generation requires a built version of makepng in the +# current directory. +# +usage(){ + exec >&2 + echo "$0 []" + echo ' Generate a set of PNG test files in "directory" ("tests" by default)' + exit 1 +} + +mp="$PWD/makepng" +test -x "$mp" || { + exec >&2 + echo "$0: the 'makepng' program must exist" + echo " in the directory within which this program:" + echo " $mp" + echo " is executed" + usage +} + +# Just one argument: the directory +testdir="tests" +test $# -gt 1 && { + testdir="$1" + shift +} +test $# -eq 0 || usage + +# Take care not to clobber something +if test -e "$testdir" +then + test -d "$testdir" || usage +else + # mkdir -p isn't portable, so do the following + mkdir "$testdir" 2>/dev/null || mkdir -p "$testdir" || usage +fi + +# This fails in a very satisfactory way if it's not accessible +cd "$testdir" +:>"test$$.png" || { + exec >&2 + echo "$testdir: directory not writable" + usage +} +rm "test$$.png" || { + exec >&2 + echo "$testdir: you have create but not write privileges here." + echo " This is unexpected. You have a spurion; "'"'"test$$.png"'"'"." + echo " You need to remove this yourself. Try a different directory." + exit 1 +} + +# Now call makepng ($mp) to create every file we can think of with a +# reasonable name +doit(){ + for gamma in "" --sRGB --linear --1.8 + do + case "$gamma" in + "") + gname=;; + --sRGB) + gname="-srgb";; + --linear) + gname="-lin";; + --1.8) + gname="-18";; + *) + gname="-$gamma";; + esac + "$mp" $gamma "$1" "$2" "test-$1-$2$gname.png" + done +} +# +for ct in gray palette +do + for bd in 1 2 4 8 + do + doit "$ct" "$bd" + done +done +# +doit "gray" "16" +# +for ct in gray-alpha rgb rgb-alpha +do + for bd in 8 16 + do + doit "$ct" "$bd" + done +done diff -ru4NwbB libpng-1.5.10/contrib/libtests/makepng.c libpng-1.6.0beta22/contrib/libtests/makepng.c --- libpng-1.5.10/contrib/libtests/makepng.c 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/libtests/makepng.c 2012-05-23 12:30:58.783873003 -0500 @@ -0,0 +1,1219 @@ +/* makepng.c + * + * Copyright (c) 2012 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Make a test PNG image. The arguments are as follows: + * + * makepng [--sRGB|--linear|--1.8] color-type bit-depth [file-name] + * + * The color-type may be numeric (and must match the numbers used by the PNG + * specification) or one of the format names listed below. The bit-depth is the + * component bit depth, or the pixel bit-depth for a color-mapped image. + * + * Without any options no color-space information is written, with the options + * an sRGB or the appropriate gAMA chunk is written. "1.8" refers to the + * display system used on older Apple computers to correct for high ambient + * light levels in the viewing environment; it applies a transform of + * approximately value^(1/1.45) to the color values and so a gAMA chunk of 65909 + * is written (1.45/2.2). + * + * The image data is generated internally. The images used are as follows: + * + * 1 channel: a square image with a diamond, the least luminous colors are on + * the edge of the image, the most luminous in the center. + * + * 2 channels: the color channel increases in luminosity from top to bottom, the + * alpha channel increases in opacity from left to right. + * + * 3 channels: linear combinations of, from the top-left corner clockwise, + * black, green, white, red. + * + * 4 channels: linear combinations of, from the top-left corner clockwise, + * transparent, red, green, blue. + * + * For color-mapped images a four channel color-map is used and the PNG file has + * a tRNS chunk, as follows: + * + * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white + * 2-bit: entry 0: transparent-green + * entry 1: 40%-red + * entry 2: 80%-blue + * entry 3: opaque-white + * 4-bit: the 16 combinations of the 2-bit case + * 8-bit: the 256 combinations of the 4-bit case + * + * The palette always has 2^bit-depth entries and the tRNS chunk one fewer. The + * image is the 1-channel diamond, but using palette index, not luminosity. + * + * Image size is determined by the final pixel depth in bits, i.e. channels x + * bit-depth, as follows: + * + * 8 bits or less: 64x64 + * 16 bits: 256x256 + * More than 16 bits: 1024x1024 + * + * Row filtering is turned off (the 'none' filter is used on every row) and the + * images are not interlaced. + * + * If file-name is given then the PNG is written to that file, else it is + * written to stdout. Notice that stdout is not supported on systems where, by + * default, it assumes text output; this program makes no attempt to change the + * text mode of stdout! + */ +#define _ISOC99_SOURCE /* for strtoull */ + +#include /* for offsetof */ +#include +#include +#include +#include +#include + +#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +/* This structure is used for inserting extra chunks (the --insert argument, not + * documented above.) + */ +typedef struct chunk_insert +{ + struct chunk_insert *next; + void (*insert)(png_structp, png_infop, int, png_charpp); + int nparams; + png_charp parameters[1]; +} chunk_insert; + +static int +channels_of_type(int color_type) +{ + if (color_type & PNG_COLOR_MASK_PALETTE) + return 1; + + else + { + int channels = 1; + + if (color_type & PNG_COLOR_MASK_COLOR) + channels = 3; + + if (color_type & PNG_COLOR_MASK_ALPHA) + return channels + 1; + + else + return channels; + } +} + +static int +pixel_depth_of_type(int color_type, int bit_depth) +{ + return channels_of_type(color_type) * bit_depth; +} + +static unsigned int +image_size_of_type(int color_type, int bit_depth) +{ + int pixel_depth = pixel_depth_of_type(color_type, bit_depth); + + if (pixel_depth < 8) + return 64; + + else if (pixel_depth > 16) + return 1024; + + else + return 256; +} + +static void +set_color(png_colorp color, png_bytep trans, unsigned int red, + unsigned int green, unsigned int blue, unsigned int alpha, + png_const_bytep gamma_table) +{ + color->red = gamma_table[red]; + color->green = gamma_table[green]; + color->blue = gamma_table[blue]; + *trans = (png_byte)alpha; +} + +static int +generate_palette(png_colorp palette, png_bytep trans, int bit_depth, + png_const_bytep gamma_table) +{ + /* + * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white + * 2-bit: entry 0: transparent-green + * entry 1: 40%-red + * entry 2: 80%-blue + * entry 3: opaque-white + * 4-bit: the 16 combinations of the 2-bit case + * 8-bit: the 256 combinations of the 4-bit case + */ + if (bit_depth == 1) + { + set_color(palette+0, trans+0, 255, 0, 0, 0, gamma_table); + set_color(palette+1, trans+1, 255, 255, 255, 255, gamma_table); + return 2; + } + + else + { + unsigned int size = 1U << (bit_depth/2); /* 2, 4 or 16 */ + unsigned int x, y, ip; + + for (x=0; x> 3; + + if (offset < rowbytes && (bit_depth < 16 || offset+1 < rowbytes)) + { + row += offset; + + switch (bit_depth) + { + case 1: + case 2: + case 4: + /* Don't gamma correct - values get smashed */ + { + unsigned int shift = (8 - bit_depth) - (x & 0x7U); + + mask <<= shift; + value = (value << shift) & mask; + *row = (png_byte)((*row & ~mask) | value); + } + return; + + default: + fprintf(stderr, "makepng: bad bit depth (internal error)\n"); + exit(1); + + case 16: + value = (unsigned int)floor(65535*pow(value/65535.,conv)+.5); + *row++ = (png_byte)(value >> 8); + *row = (png_byte)value; + return; + + case 8: + *row = gamma_table[value]; + return; + } + } + + else + { + fprintf(stderr, "makepng: row buffer overflow (internal error)\n"); + exit(1); + } + } + + else + { + fprintf(stderr, "makepng: component overflow (internal error)\n"); + exit(1); + } +} + +static void +generate_row(png_bytep row, size_t rowbytes, unsigned int y, int color_type, + int bit_depth, png_const_bytep gamma_table, double conv) +{ + png_uint_32 size_max = image_size_of_type(color_type, bit_depth)-1; + png_uint_32 depth_max = (1U << bit_depth)-1; /* up to 65536 */ + + switch (channels_of_type(color_type)) + { + /* 1 channel: a square image with a diamond, the least luminous colors are on + * the edge of the image, the most luminous in the center. + */ + case 1: + { + png_uint_32 x; + png_uint_32 base = 2*size_max - abs(2*y-size_max); + + for (x=0; x<=size_max; ++x) + { + png_uint_32 luma = base - abs(2*x-size_max); + + /* 'luma' is now in the range 0..2*size_max, we need + * 0..depth_max + */ + luma = (luma*depth_max + size_max) / (2*size_max); + set_value(row, rowbytes, x, bit_depth, luma, gamma_table, conv); + } + } + break; + + /* 2 channels: the color channel increases in luminosity from top to bottom, + * the alpha channel increases in opacity from left to right. + */ + case 2: + { + png_uint_32 alpha = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 2*x, bit_depth, + (depth_max * x * 2 + size_max) / (2 * size_max), gamma_table, + conv); + set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, + conv); + } + } + break; + + /* 3 channels: linear combinations of, from the top-left corner clockwise, + * black, green, white, red. + */ + case 3: + { + /* x0: the black->red scale (the value of the red component) at the + * start of the row (blue and green are 0). + * x1: the green->white scale (the value of the red and blue + * components at the end of the row; green is depth_max). + */ + png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + /* Interpolate x/depth_max from start to end: + * + * start end difference + * red: Y Y 0 + * green: 0 depth_max depth_max + * blue: 0 Y Y + */ + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 3*x+0, bit_depth, /* red */ Y, + gamma_table, conv); + set_value(row, rowbytes, 3*x+1, bit_depth, /* green */ + (depth_max * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 3*x+2, bit_depth, /* blue */ + (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + } + } + break; + + /* 4 channels: linear combinations of, from the top-left corner clockwise, + * transparent, red, green, blue. + */ + case 4: + { + /* x0: the transparent->blue scale (the value of the blue and alpha + * components) at the start of the row (red and green are 0). + * x1: the red->green scale (the value of the red and green + * components at the end of the row; blue is 0 and alpha is + * depth_max). + */ + png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + /* Interpolate x/depth_max from start to end: + * + * start end difference + * red: 0 depth_max-Y depth_max-Y + * green: 0 Y Y + * blue: Y 0 -Y + * alpha: Y depth_max depth_max-Y + */ + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 4*x+0, bit_depth, /* red */ + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+1, bit_depth, /* green */ + (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+2, bit_depth, /* blue */ + Y - (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+3, bit_depth, /* alpha */ + Y + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + } + } + break; + + default: + fprintf(stderr, "makepng: internal bad channel count\n"); + exit(2); + } +} + +static int /* 0 on success, else an error code */ +write_png(FILE *fp, int color_type, int bit_depth, + volatile png_fixed_point gamma, chunk_insert * volatile insert) +{ + png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,0,0,0); + volatile png_infop info_ptr = NULL; + volatile png_bytep row = NULL; + + if (png_ptr == NULL) + { + fprintf(stderr, "makepng: OOM allocating write structure\n"); + return 1; + } + + if (setjmp(png_jmpbuf(png_ptr))) + { + png_structp nv_ptr = png_ptr; + png_infop nv_info = info_ptr; + + png_ptr = NULL; + info_ptr = NULL; + png_destroy_write_struct(&nv_ptr, &nv_info); + if (row != NULL) free(row); + return 1; + } + + /* Allow benign errors so that we can write PNGs with errors */ + png_set_benign_errors(png_ptr, 1/*allowed*/); + png_init_io(png_ptr, fp); + + info_ptr = png_create_info_struct(png_ptr); + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + { + unsigned int size = image_size_of_type(color_type, bit_depth); + png_fixed_point real_gamma = 45455; /* For sRGB */ + png_byte gamma_table[256]; + double conv; + + /* This function uses the libpng values used on read to carry extra + * information about the gamma: + */ + if (gamma == PNG_GAMMA_MAC_18) + gamma = 65909; + + else if (gamma > 0 && gamma < 1000) + gamma = PNG_FP_1; + + if (gamma > 0) + real_gamma = gamma; + + { + unsigned int i; + + if (real_gamma == 45455) for (i=0; i<256; ++i) + { + gamma_table[i] = (png_byte)i; + conv = 1.; + } + + else + { + /* Convert 'i' from sRGB (45455) to real_gamma, this makes + * the images look the same regardless of the gAMA chunk. + */ + conv = real_gamma; + conv /= 45455; + + gamma_table[0] = 0; + + for (i=0; i<255; ++i) + gamma_table[i] = (png_byte)floor(pow(i/255.,conv) * 255 + 127.5); + + gamma_table[255] = 255; + } + } + + png_set_IHDR(png_ptr, info_ptr, size, size, bit_depth, color_type, + PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + if (color_type & PNG_COLOR_MASK_PALETTE) + { + int npalette; + png_color palette[256]; + png_byte trans[256]; + + npalette = generate_palette(palette, trans, bit_depth, gamma_table); + png_set_PLTE(png_ptr, info_ptr, palette, npalette); + png_set_tRNS(png_ptr, info_ptr, trans, npalette-1, + NULL/*transparent color*/); + + /* Reset gamma_table to prevent the image rows being changed */ + for (npalette=0; npalette<256; ++npalette) + gamma_table[npalette] = (png_byte)npalette; + } + + if (gamma == PNG_DEFAULT_sRGB) + png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_ABSOLUTE); + + else if (gamma > 0) /* Else don't set color space information */ + { + png_set_gAMA_fixed(png_ptr, info_ptr, real_gamma); + + /* Just use the sRGB values here. */ + png_set_cHRM_fixed(png_ptr, info_ptr, + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 + ); + } + + /* Insert extra information. */ + while (insert != NULL) + { + insert->insert(png_ptr, info_ptr, insert->nparams, insert->parameters); + insert = insert->next; + } + + /* Write the file header. */ + png_write_info(png_ptr, info_ptr); + + /* Restrict the filters */ + png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_NO_FILTERS); + + { + int passes = png_set_interlace_handling(png_ptr); + int pass; + png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); + + row = malloc(rowbytes); + + if (row == NULL) + png_error(png_ptr, "OOM allocating row buffer"); + + for (pass = 0; pass < passes; ++pass) + { + unsigned int y; + + for (y=0; y 0) + { + png_bytep data = malloc(total); + + if (data != NULL) + { + size_t new_size = 0; + + for (;;) + { + ch = getc(fp); + if (ch == EOF) break; + data[new_size++] = (png_byte)ch; + } + + if (ferror(fp) || new_size != total) + { + perror("temporary file"); + fprintf(stderr, "temporary file read error\n"); + free(data); + } + + else + { + (void)fclose(fp); + *result = data; + return total; + } + } + + else + fprintf(stderr, "%s: out of memory loading file\n", name); + } + + else + fprintf(stderr, "%s: empty file\n", name); + } + } + } + + else + { + perror(name); + fprintf(stderr, "%s: open failed\n", name); + } + + fclose(fp); + } + + else + fprintf(stderr, "makepng: %s: could not open temporary file\n", name); + + exit(1); + return 0; +} + +static png_size_t +load_fake(png_charp param, png_bytepp profile) +{ + char *endptr = NULL; + unsigned long long int size = strtoull(param, &endptr, 0/*base*/); + + /* The 'fake' format is *[string] */ + if (endptr != NULL && *endptr == '*') + { + size_t len = strlen(++endptr); + size_t result = (size_t)size; + + if (len == 0) len = 1; /* capture the terminating '\0' */ + + /* Now repeat that string to fill 'size' bytes. */ + if (result == size && (*profile = malloc(result)) != NULL) + { + png_bytep out = *profile; + + if (len == 1) + memset(out, *endptr, result); + + else + { + while (size >= len) + { + memcpy(out, endptr, len); + out += len; + size -= len; + } + memcpy(out, endptr, size); + } + + return result; + } + + else + { + fprintf(stderr, "%s: size exceeds system limits\n", param); + exit(1); + } + } + + return 0; +} + +static void +check_param_count(int nparams, int expect) +{ + if (nparams != expect) + { + fprintf(stderr, "bad parameter count (internal error)\n"); + exit(1); + } +} + +static void +insert_iCCP(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_bytep profile = NULL; + png_uint_32 proflen = 0; + int result; + + check_param_count(nparams, 2); + + switch (params[1][0]) + { + case '<': + { + png_size_t filelen = load_file(params[1]+1, &profile); + if (filelen > 0xffffffff) /* Maximum profile length */ + { + fprintf(stderr, "%s: file too long (%lu) for an ICC profile\n", + params[1]+1, (unsigned long)filelen); + exit(1); + } + proflen = (png_uint_32)filelen; + } + break; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + { + png_size_t fake_len = load_fake(params[1], &profile); + + if (fake_len > 0) /* else a simple parameter */ + { + if (fake_len > 0xffffffff) /* Maximum profile length */ + { + fprintf(stderr, + "%s: fake data too long (%lu) for an ICC profile\n", + params[1], (unsigned long)fake_len); + exit(1); + } + proflen = (png_uint_32)(fake_len & ~3U); + /* Always fix up the profile length. */ + png_save_uint_32(profile, proflen); + break; + } + } + + default: + fprintf(stderr, "--insert iCCP \"%s\": unrecognized\n", params[1]); + fprintf(stderr, " use '<' to read a file: \" 3) + { + png_uint_32 prof_header = png_get_uint_32(profile); + + if (prof_header != proflen) + { + fprintf(stderr, "--insert iCCP %s: profile length field wrong:\n", + params[1]); + fprintf(stderr, " actual %lu, recorded value %lu (corrected)\n", + (unsigned long)proflen, (unsigned long)prof_header); + png_save_uint_32(profile, proflen); + } + } + + if (result && profile != NULL && proflen >=4) + png_set_iCCP(png_ptr, info_ptr, params[0], PNG_COMPRESSION_TYPE_BASE, + profile, proflen); + + if (profile) + free(profile); + + if (!result) + exit(1); +} + +static void +clear_text(png_text *text, png_charp keyword) +{ + text->compression = -1; /* none */ + text->key = keyword; + text->text = NULL; + text->text_length = 0; /* libpng calculates this */ + text->itxt_length = 0; /* libpng calculates this */ + text->lang = NULL; + text->lang_key = NULL; +} + +static void +set_text(png_structp png_ptr, png_infop info_ptr, png_textp text, + png_charp param) +{ + switch (param[0]) + { + case '<': + { + png_bytep file = NULL; + + text->text_length = load_file(param+1, &file); + text->text = (png_charp)file; + } + break; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + { + png_bytep data = NULL; + png_size_t fake_len = load_fake(param, &data); + + if (fake_len > 0) /* else a simple parameter */ + { + text->text_length = fake_len; + text->text = (png_charp)data; + break; + } + } + + default: + text->text = param; + break; + } + + png_set_text(png_ptr, info_ptr, text, 1); + + if (text->text != param) + free(text->text); +} + +static void +insert_tEXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 2); + clear_text(&text, params[0]); + set_text(png_ptr, info_ptr, &text, params[1]); +} + +static void +insert_zTXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 2); + clear_text(&text, params[0]); + text.compression = 0; /* deflate */ + set_text(png_ptr, info_ptr, &text, params[1]); +} + +static void +insert_iTXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 4); + clear_text(&text, params[0]); + text.compression = 2; /* iTXt + deflate */ + text.lang = params[1];/* language tag */ + text.lang_key = params[2]; /* translated keyword */ + set_text(png_ptr, info_ptr, &text, params[3]); +} + +static void +insert_hIST(png_structp png_ptr, png_infop info_ptr, int nparams, png_charpp params) +{ + int i; + png_uint_16 freq[256]; + + /* libpng takes the count from the PLTE count; we don't check it here but we + * do set the array to 0 for unspecified entries. + */ + memset(freq, 0, sizeof freq); + for (i=0; inext = NULL; + cip->insert = insert; + cip->nparams = nparams; + for (i=0; iparameters[i] = list[i]; + + return cip; +} + +static chunk_insert * +find_insert(png_const_charp what, png_charp param) +{ + png_uint_32 chunk = 0; + png_charp parameter_list[1024]; + int i, nparams; + + /* Assemble the chunk name */ + for (i=0; i<4; ++i) + { + char ch = what[i]; + + if ((ch >= 65 && ch <= 90) || (ch >= 97 && ch <= 122)) + chunk = (chunk << 8) + what[i]; + + else + break; + } + + if (i < 4 || what[4] != 0) + { + fprintf(stderr, "makepng --insert \"%s\": invalid chunk name\n", what); + exit(1); + } + + /* Assemble the parameter list. */ + nparams = find_parameters(what, param, parameter_list, 1024); + +# define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) + + switch (chunk) + { + case CHUNK(105,67,67,80): /* iCCP */ + if (nparams == 2) + return make_insert(what, insert_iCCP, nparams, parameter_list); + break; + + case CHUNK(116,69,88,116): /* tEXt */ + if (nparams == 2) + return make_insert(what, insert_tEXt, nparams, parameter_list); + break; + + case CHUNK(122,84,88,116): /* zTXt */ + if (nparams == 2) + return make_insert(what, insert_zTXt, nparams, parameter_list); + break; + + case CHUNK(105,84,88,116): /* iTXt */ + if (nparams == 4) + return make_insert(what, insert_iTXt, nparams, parameter_list); + break; + + case CHUNK(104,73,83,84): /* hIST */ + if (nparams <= 256) + return make_insert(what, insert_hIST, nparams, parameter_list); + break; + +#if 0 + case CHUNK(115,80,76,84): /* sPLT */ + return make_insert(what, insert_sPLT, nparams, parameter_list); +#endif + + default: + fprintf(stderr, "makepng --insert \"%s\": unrecognized chunk name\n", + what); + exit(1); + } + + bad_parameter_count(what, nparams); + return NULL; +} + +int +main(int argc, char **argv) +{ + FILE *fp = stdout; + const char *file_name = NULL; + int color_type = 8; /* invalid */ + int bit_depth = 32; /* invalid */ + png_fixed_point gamma = 0; /* not set */ + chunk_insert *head_insert = NULL; + chunk_insert **insert_ptr = &head_insert; + + while (--argc > 0) + { + const char *arg = *++argv; + + if (strcmp(arg, "--sRGB") == 0) + { + gamma = PNG_DEFAULT_sRGB; + continue; + } + + if (strcmp(arg, "--linear") == 0) + { + gamma = PNG_FP_1; + continue; + } + + if (strcmp(arg, "--1.8") == 0) + { + gamma = PNG_GAMMA_MAC_18; + continue; + } + + if (argc >= 3 && strcmp(arg, "--insert") == 0) + { + png_const_charp what = *++argv; + png_charp param = *++argv; + chunk_insert *new_insert; + + argc -= 2; + + new_insert = find_insert(what, param); + + if (new_insert != NULL) + { + *insert_ptr = new_insert; + insert_ptr = &new_insert->next; + } + + continue; + } + + if (arg[0] == '-') + { + fprintf(stderr, "makepng: %s: invalid option\n", arg); + exit(1); + } + + if (strcmp(arg, "palette") == 0) + { + color_type = PNG_COLOR_TYPE_PALETTE; + continue; + } + + if (strncmp(arg, "gray", 4) == 0) + { + if (arg[5] == 0) + { + color_type = PNG_COLOR_TYPE_GRAY; + continue; + } + + else if (strcmp(arg+4, "a") == 0 || + strcmp(arg+4, "alpha") == 0 || + strcmp(arg+4, "-alpha") == 0) + { + color_type = PNG_COLOR_TYPE_GRAY_ALPHA; + continue; + } + } + + if (strncmp(arg, "rgb", 3) == 0) + { + if (arg[4] == 0) + { + color_type = PNG_COLOR_TYPE_RGB; + continue; + } + + else if (strcmp(arg+3, "a") == 0 || + strcmp(arg+3, "alpha") == 0 || + strcmp(arg+3, "-alpha") == 0) + { + color_type = PNG_COLOR_TYPE_RGB_ALPHA; + continue; + } + } + + if (color_type == 8) + { + color_type = atoi(arg); + if (color_type < 0 || color_type > 6 || color_type == 1 || + color_type == 5) + { + fprintf(stderr, "makepng: %s: not a valid color type\n", arg); + exit(1); + } + + continue; + } + + if (bit_depth == 32) + { + bit_depth = atoi(arg); + if (bit_depth <= 0 || bit_depth > 16 || + (bit_depth & -bit_depth) != bit_depth) + { + fprintf(stderr, "makepng: %s: not a valid bit depth\n", arg); + exit(1); + } + + continue; + } + + if (argc == 1) /* It's the file name */ + { + fp = fopen(arg, "wb"); + if (fp == NULL) + { + fprintf(stderr, "%s: %s: could not open\n", arg, strerror(errno)); + exit(1); + } + + file_name = arg; + continue; + } + + fprintf(stderr, "makepng: %s: unknown argument\n", arg); + exit(1); + } /* argument while loop */ + + if (color_type == 8 || bit_depth == 32) + { + fprintf(stderr, "usage: makepng [--sRGB|--linear|--1.8] " + "color-type bit-depth [file-name]\n" + " Make a test PNG file, by default writes to stdout.\n"); + exit(1); + } + + { + int ret = write_png(fp, color_type, bit_depth, gamma, head_insert); + + if (ret != 0 && file_name != NULL) + remove(file_name); + + return ret; + } +} diff -ru4NwbB libpng-1.5.10/contrib/libtests/makepng.c.orig libpng-1.6.0beta22/contrib/libtests/makepng.c.orig --- libpng-1.5.10/contrib/libtests/makepng.c.orig 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/libtests/makepng.c.orig 2012-05-23 12:30:58.798434128 -0500 @@ -0,0 +1,1217 @@ +/* makepng.c + * + * Copyright (c) 2012 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Make a test PNG image. The arguments are as follows: + * + * makepng [--sRGB|--linear|--1.8] color-type bit-depth [file-name] + * + * The color-type may be numeric (and must match the numbers used by the PNG + * specification) or one of the format names listed below. The bit-depth is the + * component bit depth, or the pixel bit-depth for a color-mapped image. + * + * Without any options no color-space information is written, with the options + * an sRGB or the appropriate gAMA chunk is written. "1.8" refers to the + * display system used on older Apple computers to correct for high ambient + * light levels in the viewing environment; it applies a transform of + * approximately value^(1/1.45) to the color values and so a gAMA chunk of 65909 + * is written (1.45/2.2). + * + * The image data is generated internally. The images used are as follows: + * + * 1 channel: a square image with a diamond, the least luminous colors are on + * the edge of the image, the most luminous in the center. + * + * 2 channels: the color channel increases in luminosity from top to bottom, the + * alpha channel increases in opacity from left to right. + * + * 3 channels: linear combinations of, from the top-left corner clockwise, + * black, green, white, red. + * + * 4 channels: linear combinations of, from the top-left corner clockwise, + * transparent, red, green, blue. + * + * For color-mapped images a four channel color-map is used and the PNG file has + * a tRNS chunk, as follows: + * + * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white + * 2-bit: entry 0: transparent-green + * entry 1: 40%-red + * entry 2: 80%-blue + * entry 3: opaque-white + * 4-bit: the 16 combinations of the 2-bit case + * 8-bit: the 256 combinations of the 4-bit case + * + * The palette always has 2^bit-depth entries and the tRNS chunk one fewer. The + * image is the 1-channel diamond, but using palette index, not luminosity. + * + * Image size is determined by the final pixel depth in bits, i.e. channels x + * bit-depth, as follows: + * + * 8 bits or less: 64x64 + * 16 bits: 256x256 + * More than 16 bits: 1024x1024 + * + * Row filtering is turned off (the 'none' filter is used on every row) and the + * images are not interlaced. + * + * If file-name is given then the PNG is written to that file, else it is + * written to stdout. Notice that stdout is not supported on systems where, by + * default, it assumes text output; this program makes no attempt to change the + * text mode of stdout! + */ +#define _ISOC99_SOURCE /* for strtoull */ + +#include /* for offsetof */ +#include +#include +#include +#include +#include + +#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +/* This structure is used for inserting extra chunks (the --insert argument, not + * documented above.) + */ +typedef struct chunk_insert +{ + struct chunk_insert *next; + void (*insert)(png_structp, png_infop, int, png_charpp); + int nparams; + png_charp parameters[1]; +} chunk_insert; + +static int +channels_of_type(int color_type) +{ + if (color_type & PNG_COLOR_MASK_PALETTE) + return 1; + + else + { + int channels = 1; + + if (color_type & PNG_COLOR_MASK_COLOR) + channels = 3; + + if (color_type & PNG_COLOR_MASK_ALPHA) + return channels + 1; + + else + return channels; + } +} + +static int +pixel_depth_of_type(int color_type, int bit_depth) +{ + return channels_of_type(color_type) * bit_depth; +} + +static unsigned int +image_size_of_type(int color_type, int bit_depth) +{ + int pixel_depth = pixel_depth_of_type(color_type, bit_depth); + + if (pixel_depth < 8) + return 64; + + else if (pixel_depth > 16) + return 1024; + + else + return 256; +} + +static void +set_color(png_colorp color, png_bytep trans, unsigned int red, + unsigned int green, unsigned int blue, unsigned int alpha, + png_const_bytep gamma_table) +{ + color->red = gamma_table[red]; + color->green = gamma_table[green]; + color->blue = gamma_table[blue]; + *trans = (png_byte)alpha; +} + +static int +generate_palette(png_colorp palette, png_bytep trans, int bit_depth, + png_const_bytep gamma_table) +{ + /* + * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white + * 2-bit: entry 0: transparent-green + * entry 1: 40%-red + * entry 2: 80%-blue + * entry 3: opaque-white + * 4-bit: the 16 combinations of the 2-bit case + * 8-bit: the 256 combinations of the 4-bit case + */ + if (bit_depth == 1) + { + set_color(palette+0, trans+0, 255, 0, 0, 0, gamma_table); + set_color(palette+1, trans+1, 255, 255, 255, 255, gamma_table); + return 2; + } + + else + { + unsigned int size = 1U << (bit_depth/2); /* 2, 4 or 16 */ + unsigned int x, y, ip; + + for (x=0; x> 3; + + if (offset < rowbytes && (bit_depth < 16 || offset+1 < rowbytes)) + { + row += offset; + + switch (bit_depth) + { + case 1: + case 2: + case 4: + /* Don't gamma correct - values get smashed */ + { + unsigned int shift = (8 - bit_depth) - (x & 0x7U); + + mask <<= shift; + value = (value << shift) & mask; + *row = (png_byte)((*row & ~mask) | value); + } + return; + + default: + fprintf(stderr, "makepng: bad bit depth (internal error)\n"); + exit(1); + + case 16: + value = (unsigned int)floor(65535*pow(value/65535.,conv)+.5); + *row++ = (png_byte)(value >> 8); + *row = (png_byte)value; + return; + + case 8: + *row = gamma_table[value]; + return; + } + } + + else + { + fprintf(stderr, "makepng: row buffer overflow (internal error)\n"); + exit(1); + } + } + + else + { + fprintf(stderr, "makepng: component overflow (internal error)\n"); + exit(1); + } +} + +static void +generate_row(png_bytep row, size_t rowbytes, unsigned int y, int color_type, + int bit_depth, png_const_bytep gamma_table, double conv) +{ + png_uint_32 size_max = image_size_of_type(color_type, bit_depth)-1; + png_uint_32 depth_max = (1U << bit_depth)-1; /* up to 65536 */ + + switch (channels_of_type(color_type)) + { + /* 1 channel: a square image with a diamond, the least luminous colors are on + * the edge of the image, the most luminous in the center. + */ + case 1: + { + png_uint_32 x; + png_uint_32 base = 2*size_max - abs(2*y-size_max); + + for (x=0; x<=size_max; ++x) + { + png_uint_32 luma = base - abs(2*x-size_max); + + /* 'luma' is now in the range 0..2*size_max, we need + * 0..depth_max + */ + luma = (luma*depth_max + size_max) / (2*size_max); + set_value(row, rowbytes, x, bit_depth, luma, gamma_table, conv); + } + } + break; + + /* 2 channels: the color channel increases in luminosity from top to bottom, + * the alpha channel increases in opacity from left to right. + */ + case 2: + { + png_uint_32 alpha = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 2*x, bit_depth, + (depth_max * x * 2 + size_max) / (2 * size_max), gamma_table, + conv); + set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, + conv); + } + } + break; + + /* 3 channels: linear combinations of, from the top-left corner clockwise, + * black, green, white, red. + */ + case 3: + { + /* x0: the black->red scale (the value of the red component) at the + * start of the row (blue and green are 0). + * x1: the green->white scale (the value of the red and blue + * components at the end of the row; green is depth_max). + */ + png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + /* Interpolate x/depth_max from start to end: + * + * start end difference + * red: Y Y 0 + * green: 0 depth_max depth_max + * blue: 0 Y Y + */ + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 3*x+0, bit_depth, /* red */ Y, + gamma_table, conv); + set_value(row, rowbytes, 3*x+1, bit_depth, /* green */ + (depth_max * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 3*x+2, bit_depth, /* blue */ + (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + } + } + break; + + /* 4 channels: linear combinations of, from the top-left corner clockwise, + * transparent, red, green, blue. + */ + case 4: + { + /* x0: the transparent->blue scale (the value of the blue and alpha + * components) at the start of the row (red and green are 0). + * x1: the red->green scale (the value of the red and green + * components at the end of the row; blue is 0 and alpha is + * depth_max). + */ + png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + /* Interpolate x/depth_max from start to end: + * + * start end difference + * red: 0 depth_max-Y depth_max-Y + * green: 0 Y Y + * blue: Y 0 -Y + * alpha: Y depth_max depth_max-Y + */ + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 4*x+0, bit_depth, /* red */ + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+1, bit_depth, /* green */ + (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+2, bit_depth, /* blue */ + Y - (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+3, bit_depth, /* alpha */ + Y + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + } + } + break; + + default: + fprintf(stderr, "makepng: internal bad channel count\n"); + exit(2); + } +} + +static int /* 0 on success, else an error code */ +write_png(FILE *fp, int color_type, int bit_depth, + volatile png_fixed_point gamma, chunk_insert * volatile insert) +{ + png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,0,0,0); + volatile png_infop info_ptr = NULL; + volatile png_bytep row = NULL; + + if (png_ptr == NULL) + { + fprintf(stderr, "makepng: OOM allocating write structure\n"); + return 1; + } + + if (setjmp(png_jmpbuf(png_ptr))) + { + png_structp nv_ptr = png_ptr; + png_infop nv_info = info_ptr; + + png_ptr = NULL; + info_ptr = NULL; + png_destroy_write_struct(&nv_ptr, &nv_info); + if (row != NULL) free(row); + return 1; + } + + png_init_io(png_ptr, fp); + + info_ptr = png_create_info_struct(png_ptr); + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + { + unsigned int size = image_size_of_type(color_type, bit_depth); + png_fixed_point real_gamma = 45455; /* For sRGB */ + png_byte gamma_table[256]; + double conv; + + /* This function uses the libpng values used on read to carry extra + * information about the gamma: + */ + if (gamma == PNG_GAMMA_MAC_18) + gamma = 65909; + + else if (gamma > 0 && gamma < 1000) + gamma = PNG_FP_1; + + if (gamma > 0) + real_gamma = gamma; + + { + unsigned int i; + + if (real_gamma == 45455) for (i=0; i<256; ++i) + { + gamma_table[i] = (png_byte)i; + conv = 1.; + } + + else + { + /* Convert 'i' from sRGB (45455) to real_gamma, this makes + * the images look the same regardless of the gAMA chunk. + */ + conv = real_gamma; + conv /= 45455; + + gamma_table[0] = 0; + + for (i=0; i<255; ++i) + gamma_table[i] = (png_byte)floor(pow(i/255.,conv) * 255 + 127.5); + + gamma_table[255] = 255; + } + } + + png_set_IHDR(png_ptr, info_ptr, size, size, bit_depth, color_type, + PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + if (color_type & PNG_COLOR_MASK_PALETTE) + { + int npalette; + png_color palette[256]; + png_byte trans[256]; + + npalette = generate_palette(palette, trans, bit_depth, gamma_table); + png_set_PLTE(png_ptr, info_ptr, palette, npalette); + png_set_tRNS(png_ptr, info_ptr, trans, npalette-1, + NULL/*transparent color*/); + + /* Reset gamma_table to prevent the image rows being changed */ + for (npalette=0; npalette<256; ++npalette) + gamma_table[npalette] = (png_byte)npalette; + } + + if (gamma == PNG_DEFAULT_sRGB) + png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_ABSOLUTE); + + else if (gamma > 0) /* Else don't set color space information */ + { + png_set_gAMA_fixed(png_ptr, info_ptr, real_gamma); + + /* Just use the sRGB values here. */ + png_set_cHRM_fixed(png_ptr, info_ptr, + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 + ); + } + + /* Insert extra information. */ + while (insert != NULL) + { + insert->insert(png_ptr, info_ptr, insert->nparams, insert->parameters); + insert = insert->next; + } + + /* Write the file header. */ + png_write_info(png_ptr, info_ptr); + + /* Restrict the filters */ + png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_NO_FILTERS); + + { + int passes = png_set_interlace_handling(png_ptr); + int pass; + png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); + + row = malloc(rowbytes); + + if (row == NULL) + png_error(png_ptr, "OOM allocating row buffer"); + + for (pass = 0; pass < passes; ++pass) + { + unsigned int y; + + for (y=0; y 0) + { + png_bytep data = malloc(total); + + if (data != NULL) + { + size_t new_size = 0; + + for (;;) + { + ch = getc(fp); + if (ch == EOF) break; + data[new_size++] = (png_byte)ch; + } + + if (ferror(fp) || new_size != total) + { + perror("temporary file"); + fprintf(stderr, "temporary file read error\n"); + free(data); + } + + else + { + (void)fclose(fp); + *result = data; + return total; + } + } + + else + fprintf(stderr, "%s: out of memory loading file\n", name); + } + + else + fprintf(stderr, "%s: empty file\n", name); + } + } + } + + else + { + perror(name); + fprintf(stderr, "%s: open failed\n", name); + } + + fclose(fp); + } + + else + fprintf(stderr, "makepng: %s: could not open temporary file\n", name); + + exit(1); + return 0; +} + +static png_size_t +load_fake(png_charp param, png_bytepp profile) +{ + char *endptr = NULL; + unsigned long long int size = strtoull(param, &endptr, 0/*base*/); + + /* The 'fake' format is *[string] */ + if (endptr != NULL && *endptr == '*') + { + size_t len = strlen(++endptr); + size_t result = (size_t)size; + + if (len == 0) len = 1; /* capture the terminating '\0' */ + + /* Now repeat that string to fill 'size' bytes. */ + if (result == size && (*profile = malloc(result)) != NULL) + { + png_bytep out = *profile; + + if (len == 1) + memset(out, *endptr, result); + + else + { + while (size >= len) + { + memcpy(out, endptr, len); + out += len; + size -= len; + } + memcpy(out, endptr, size); + } + + return result; + } + + else + { + fprintf(stderr, "%s: size exceeds system limits\n", param); + exit(1); + } + } + + return 0; +} + +static void +check_param_count(int nparams, int expect) +{ + if (nparams != expect) + { + fprintf(stderr, "bad parameter count (internal error)\n"); + exit(1); + } +} + +static void +insert_iCCP(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_bytep profile = NULL; + png_uint_32 proflen = 0; + int result; + + check_param_count(nparams, 2); + + switch (params[1][0]) + { + case '<': + { + png_size_t filelen = load_file(params[1]+1, &profile); + if (filelen > 0xffffffff) /* Maximum profile length */ + { + fprintf(stderr, "%s: file too long (%lu) for an ICC profile\n", + params[1]+1, (unsigned long)filelen); + exit(1); + } + proflen = (png_uint_32)filelen; + } + break; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + { + png_size_t fake_len = load_fake(params[1], &profile); + + if (fake_len > 0) /* else a simple parameter */ + { + if (fake_len > 0xffffffff) /* Maximum profile length */ + { + fprintf(stderr, + "%s: fake data too long (%lu) for an ICC profile\n", + params[1], (unsigned long)fake_len); + exit(1); + } + proflen = (png_uint_32)(fake_len & ~3U); + /* Always fix up the profile length. */ + png_save_uint_32(profile, proflen); + break; + } + } + + default: + fprintf(stderr, "--insert iCCP \"%s\": unrecognized\n", params[1]); + fprintf(stderr, " use '<' to read a file: \" 3) + { + png_uint_32 prof_header = png_get_uint_32(profile); + + if (prof_header != proflen) + { + fprintf(stderr, "--insert iCCP %s: profile length field wrong:\n", + params[1]); + fprintf(stderr, " actual %lu, recorded value %lu (corrected)\n", + (unsigned long)proflen, (unsigned long)prof_header); + png_save_uint_32(profile, proflen); + } + } + + if (result && profile != NULL && proflen >=4) + png_set_iCCP(png_ptr, info_ptr, params[0], PNG_COMPRESSION_TYPE_BASE, + profile, proflen); + + if (profile) + free(profile); + + if (!result) + exit(1); +} + +static void +clear_text(png_text *text, png_charp keyword) +{ + text->compression = -1; /* none */ + text->key = keyword; + text->text = NULL; + text->text_length = 0; /* libpng calculates this */ + text->itxt_length = 0; /* libpng calculates this */ + text->lang = NULL; + text->lang_key = NULL; +} + +static void +set_text(png_structp png_ptr, png_infop info_ptr, png_textp text, + png_charp param) +{ + switch (param[0]) + { + case '<': + { + png_bytep file = NULL; + + text->text_length = load_file(param+1, &file); + text->text = (png_charp)file; + } + break; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + { + png_bytep data = NULL; + png_size_t fake_len = load_fake(param, &data); + + if (fake_len > 0) /* else a simple parameter */ + { + text->text_length = fake_len; + text->text = (png_charp)data; + break; + } + } + + default: + text->text = param; + break; + } + + png_set_text(png_ptr, info_ptr, text, 1); + + if (text->text != param) + free(text->text); +} + +static void +insert_tEXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 2); + clear_text(&text, params[0]); + set_text(png_ptr, info_ptr, &text, params[1]); +} + +static void +insert_zTXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 2); + clear_text(&text, params[0]); + text.compression = 0; /* deflate */ + set_text(png_ptr, info_ptr, &text, params[1]); +} + +static void +insert_iTXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 4); + clear_text(&text, params[0]); + text.compression = 2; /* iTXt + deflate */ + text.lang = params[1];/* language tag */ + text.lang_key = params[2]; /* translated keyword */ + set_text(png_ptr, info_ptr, &text, params[3]); +} + +static void +insert_hIST(png_structp png_ptr, png_infop info_ptr, int nparams, png_charpp params) +{ + int i; + png_uint_16 freq[256]; + + /* libpng takes the count from the PLTE count; we don't check it here but we + * do set the array to 0 for unspecified entries. + */ + memset(freq, 0, sizeof freq); + for (i=0; inext = NULL; + cip->insert = insert; + cip->nparams = nparams; + for (i=0; iparameters[i] = list[i]; + + return cip; +} + +static chunk_insert * +find_insert(png_const_charp what, png_charp param) +{ + png_uint_32 chunk = 0; + png_charp parameter_list[1024]; + int i, nparams; + + /* Assemble the chunk name */ + for (i=0; i<4; ++i) + { + char ch = what[i]; + + if ((ch >= 65 && ch <= 90) || (ch >= 97 && ch <= 122)) + chunk = (chunk << 8) + what[i]; + + else + break; + } + + if (i < 4 || what[4] != 0) + { + fprintf(stderr, "makepng --insert \"%s\": invalid chunk name\n", what); + exit(1); + } + + /* Assemble the parameter list. */ + nparams = find_parameters(what, param, parameter_list, 1024); + +# define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) + + switch (chunk) + { + case CHUNK(105,67,67,80): /* iCCP */ + if (nparams == 2) + return make_insert(what, insert_iCCP, nparams, parameter_list); + break; + + case CHUNK(116,69,88,116): /* tEXt */ + if (nparams == 2) + return make_insert(what, insert_tEXt, nparams, parameter_list); + break; + + case CHUNK(122,84,88,116): /* zTXt */ + if (nparams == 2) + return make_insert(what, insert_zTXt, nparams, parameter_list); + break; + + case CHUNK(105,84,88,116): /* iTXt */ + if (nparams == 4) + return make_insert(what, insert_iTXt, nparams, parameter_list); + break; + + case CHUNK(104,73,83,84): /* hIST */ + if (nparams <= 256) + return make_insert(what, insert_hIST, nparams, parameter_list); + break; + +#if 0 + case CHUNK(115,80,76,84): /* sPLT */ + return make_insert(what, insert_sPLT, nparams, parameter_list); +#endif + + default: + fprintf(stderr, "makepng --insert \"%s\": unrecognized chunk name\n", + what); + exit(1); + } + + bad_parameter_count(what, nparams); + return NULL; +} + +int +main(int argc, char **argv) +{ + FILE *fp = stdout; + const char *file_name = NULL; + int color_type = 8; /* invalid */ + int bit_depth = 32; /* invalid */ + png_fixed_point gamma = 0; /* not set */ + chunk_insert *head_insert = NULL; + chunk_insert **insert_ptr = &head_insert; + + while (--argc > 0) + { + const char *arg = *++argv; + + if (strcmp(arg, "--sRGB") == 0) + { + gamma = PNG_DEFAULT_sRGB; + continue; + } + + if (strcmp(arg, "--linear") == 0) + { + gamma = PNG_FP_1; + continue; + } + + if (strcmp(arg, "--1.8") == 0) + { + gamma = PNG_GAMMA_MAC_18; + continue; + } + + if (argc >= 3 && strcmp(arg, "--insert") == 0) + { + png_const_charp what = *++argv; + png_charp param = *++argv; + chunk_insert *new_insert; + + argc -= 2; + + new_insert = find_insert(what, param); + + if (new_insert != NULL) + { + *insert_ptr = new_insert; + insert_ptr = &new_insert->next; + } + + continue; + } + + if (arg[0] == '-') + { + fprintf(stderr, "makepng: %s: invalid option\n", arg); + exit(1); + } + + if (strcmp(arg, "palette") == 0) + { + color_type = PNG_COLOR_TYPE_PALETTE; + continue; + } + + if (strncmp(arg, "gray", 4) == 0) + { + if (arg[5] == 0) + { + color_type = PNG_COLOR_TYPE_GRAY; + continue; + } + + else if (strcmp(arg+4, "a") == 0 || + strcmp(arg+4, "alpha") == 0 || + strcmp(arg+4, "-alpha") == 0) + { + color_type = PNG_COLOR_TYPE_GRAY_ALPHA; + continue; + } + } + + if (strncmp(arg, "rgb", 3) == 0) + { + if (arg[4] == 0) + { + color_type = PNG_COLOR_TYPE_RGB; + continue; + } + + else if (strcmp(arg+3, "a") == 0 || + strcmp(arg+3, "alpha") == 0 || + strcmp(arg+3, "-alpha") == 0) + { + color_type = PNG_COLOR_TYPE_RGB_ALPHA; + continue; + } + } + + if (color_type == 8) + { + color_type = atoi(arg); + if (color_type < 0 || color_type > 6 || color_type == 1 || + color_type == 5) + { + fprintf(stderr, "makepng: %s: not a valid color type\n", arg); + exit(1); + } + + continue; + } + + if (bit_depth == 32) + { + bit_depth = atoi(arg); + if (bit_depth <= 0 || bit_depth > 16 || + (bit_depth & -bit_depth) != bit_depth) + { + fprintf(stderr, "makepng: %s: not a valid bit depth\n", arg); + exit(1); + } + + continue; + } + + if (argc == 1) /* It's the file name */ + { + fp = fopen(arg, "wb"); + if (fp == NULL) + { + fprintf(stderr, "%s: %s: could not open\n", arg, strerror(errno)); + exit(1); + } + + file_name = arg; + continue; + } + + fprintf(stderr, "makepng: %s: unknown argument\n", arg); + exit(1); + } /* argument while loop */ + + if (color_type == 8 || bit_depth == 32) + { + fprintf(stderr, "usage: makepng [--sRGB|--linear|--1.8] " + "color-type bit-depth [file-name]\n" + " Make a test PNG file, by default writes to stdout.\n"); + exit(1); + } + + { + int ret = write_png(fp, color_type, bit_depth, gamma, head_insert); + + if (ret != 0 && file_name != NULL) + remove(file_name); + + return ret; + } +} diff -ru4NwbB libpng-1.5.10/contrib/libtests/pngstest.c libpng-1.6.0beta22/contrib/libtests/pngstest.c --- libpng-1.5.10/contrib/libtests/pngstest.c 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/libtests/pngstest.c 2012-05-23 12:30:58.818046345 -0500 @@ -0,0 +1,3681 @@ +/*- + * pngstest.c + * + * Copyright (c) 2012 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Test for the PNG 'simplified' APIs. + */ +#define _ISOC90_SOURCE 1 +#define MALLOC_CHECK_ 2/*glibc facility: turn on debugging*/ + +#include +#include +#include +#include +#include +#include +#include + +#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +#include "../tools/sRGB.h" + +/* KNOWN ISSUES + * + * These defines switch on alternate algorithms for format convertions to match + * the current libpng implementation; they are set to allow pngstest to pass + * even though libpng is producing answers that are not as correct as they + * should be. + */ +#define ALLOW_UNUSED_GPC 0 + /* If true include unused static GPC functions and declare an external array + * of them to hide the fact that they are unused. This is for development + * use while testing the correct function to use to take into account libpng + * misbehavior, such as using a simple power law to correct sRGB to linear. + */ + +/* The following is to support direct compilation of this file as C++ */ +#ifdef __cplusplus +# define voidcast(type, value) static_cast(value) +# define aligncastconst(type, value) \ + static_cast(static_cast(value)) +#else +# define voidcast(type, value) (value) +# define aligncastconst(type, value) ((const void*)(value)) +#endif /* __cplusplus */ + +/* Generate random bytes. This uses a boring repeatable algorithm and it + * is implemented here so that it gives the same set of numbers on every + * architecture. It's a linear congruential generator (Knuth or Sedgewick + * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and + * Hill, "The Art of Electronics". + */ +static void +make_random_bytes(png_uint_32* seed, void* pv, size_t size) +{ + png_uint_32 u0 = seed[0], u1 = seed[1]; + png_bytep bytes = voidcast(png_bytep, pv); + + /* There are thirty three bits, the next bit in the sequence is bit-33 XOR + * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. + */ + size_t i; + for (i=0; i> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; + u1 <<= 8; + u1 |= u0 >> 24; + u0 <<= 8; + u0 |= u; + *bytes++ = (png_byte)u; + } + + seed[0] = u0; + seed[1] = u1; +} + +static void +random_color(png_colorp color) +{ + static png_uint_32 color_seed[2] = { 0x12345678, 0x9abcdef }; + make_random_bytes(color_seed, color, sizeof *color); +} + +/* Math support - neither Cygwin nor Visual Studio have C99 support and we need + * a predictable rounding function, so make one here: + */ +static double +closestinteger(double x) +{ + return floor(x + .5); +} + +/* Cast support: remove GCC whines. */ +static png_byte +u8d(double d) +{ + d = closestinteger(d); + return (png_byte)d; +} + +static png_uint_16 +u16d(double d) +{ + d = closestinteger(d); + return (png_uint_16)d; +} + +/* sRGB support: use exact calculations rounded to the nearest int, see the + * fesetround() call in main(). sRGB_to_d optimizes the 8 to 16-bit convertion. + */ +static double sRGB_to_d[256]; +static double g22_to_d[256]; + +static void +init_sRGB_to_d(void) +{ + int i; + + sRGB_to_d[0] = 0; + for (i=1; i<255; ++i) + sRGB_to_d[i] = linear_from_sRGB(i/255.); + sRGB_to_d[255] = 1; + + g22_to_d[0] = 0; + for (i=1; i<255; ++i) + g22_to_d[i] = pow(i/255., 1/.45455); + g22_to_d[255] = 1; +} + +static png_byte +sRGB(double linear /*range 0.0 .. 1.0*/) +{ + return u8d(255 * sRGB_from_linear(linear)); +} + +static png_byte +isRGB(int fixed_linear) +{ + return sRGB(fixed_linear / 65535.); +} + +#if 0 /* not used */ +static png_byte +unpremultiply(int component, int alpha) +{ + if (alpha <= component) + return 255; /* Arbitrary, but consistent with the libpng code */ + + else if (alpha >= 65535) + return isRGB(component); + + else + return sRGB((double)component / alpha); +} +#endif + +static png_uint_16 +ilinear(int fixed_srgb) +{ + return u16d(65535 * sRGB_to_d[fixed_srgb]); +} + +static png_uint_16 +ilineara(int fixed_srgb, int alpha) +{ + return u16d((257 * alpha) * sRGB_to_d[fixed_srgb]); +} + +static png_uint_16 +ilinear_g22(int fixed_srgb) +{ + return u16d(65535 * g22_to_d[fixed_srgb]); +} + +#if ALLOW_UNUSED_GPC +static png_uint_16 +ilineara_g22(int fixed_srgb, int alpha) +{ + return u16d((257 * alpha) * g22_to_d[fixed_srgb]); +} +#endif + +static double +YfromRGBint(int ir, int ig, int ib) +{ + double r = ir; + double g = ig; + double b = ib; + return YfromRGB(r, g, b); +} + +#if 0 /* unused */ +/* The error that results from using a 2.2 power law in place of the correct + * sRGB transform, given an 8-bit value which might be either sRGB or power-law. + */ +static int +power_law_error8(int value) +{ + if (value > 0 && value < 255) + { + double vd = value / 255.; + double e = fabs( + pow(sRGB_to_d[value], 1/2.2) - sRGB_from_linear(pow(vd, 2.2))); + + /* Always allow an extra 1 here for rounding errors */ + e = 1+floor(255 * e); + return (int)e; + } + + return 0; +} + +static int error_in_sRGB_roundtrip = 56; /* by experiment */ +static int +power_law_error16(int value) +{ + if (value > 0 && value < 65535) + { + /* Round trip the value through an 8-bit representation but using + * non-matching to/from convertions. + */ + double vd = value / 65535.; + double e = fabs( + pow(sRGB_from_linear(vd), 2.2) - linear_from_sRGB(pow(vd, 1/2.2))); + + /* Always allow an extra 1 here for rounding errors */ + e = error_in_sRGB_roundtrip+floor(65535 * e); + return (int)e; + } + + return 0; +} + +static int +compare_8bit(int v1, int v2, int error_limit, int multiple_algorithms) +{ + int e = abs(v1-v2); + int ev1, ev2; + + if (e <= error_limit) + return 1; + + if (!multiple_algorithms) + return 0; + + ev1 = power_law_error8(v1); + if (e <= ev1) + return 1; + + ev2 = power_law_error8(v2); + if (e <= ev2) + return 1; + + return 0; +} + +static int +compare_16bit(int v1, int v2, int error_limit, int multiple_algorithms) +{ + int e = abs(v1-v2); + int ev1, ev2; + + if (e <= error_limit) + return 1; + + /* "multiple_algorithms" in this case means that a color-map has been + * involved somewhere, so we can deduce that the values were forced to 8-bit + * (like the via_linear case for 8-bit.) + */ + if (!multiple_algorithms) + return 0; + + ev1 = power_law_error16(v1); + if (e <= ev1) + return 1; + + ev2 = power_law_error16(v2); + if (e <= ev2) + return 1; + + return 0; +} +#endif /* unused */ + +#define READ_FILE 1 /* else memory */ +#define USE_STDIO 2 /* else use file name */ +#define STRICT 4 /* fail on warnings too */ +#define VERBOSE 8 +#define KEEP_TMPFILES 16 /* else delete temporary files */ +#define KEEP_GOING 32 +#define ACCUMULATE 64 +#define FAST_WRITE 128 + +static void +print_opts(png_uint_32 opts) +{ + if (opts & READ_FILE) + printf(" --file"); + if (opts & USE_STDIO) + printf(" --stdio"); + if (opts & STRICT) + printf(" --strict"); + if (opts & VERBOSE) + printf(" --verbose"); + if (opts & KEEP_TMPFILES) + printf(" --preserve"); + if (opts & KEEP_GOING) + printf(" --keep-going"); + if (opts & ACCUMULATE) + printf(" --accumulate"); + if (!(opts & FAST_WRITE)) /* --fast is currently the default */ + printf(" --slow"); +} + +#define FORMAT_NO_CHANGE 0x80000000 /* additional flag */ + +/* A name table for all the formats - defines the format of the '+' arguments to + * pngstest. + */ +#define FORMAT_COUNT 64 +#define FORMAT_MASK 0x3f +static PNG_CONST char * PNG_CONST format_names[FORMAT_COUNT] = +{ + "sRGB-gray", + "sRGB-gray+alpha", + "sRGB-rgb", + "sRGB-rgb+alpha", + "linear-gray", + "linear-gray+alpha", + "linear-rgb", + "linear-rgb+alpha", + + "color-mapped-sRGB-gray", + "color-mapped-sRGB-gray+alpha", + "color-mapped-sRGB-rgb", + "color-mapped-sRGB-rgb+alpha", + "color-mapped-linear-gray", + "color-mapped-linear-gray+alpha", + "color-mapped-linear-rgb", + "color-mapped-linear-rgb+alpha", + + "sRGB-gray", + "sRGB-gray+alpha", + "sRGB-bgr", + "sRGB-bgr+alpha", + "linear-gray", + "linear-gray+alpha", + "linear-bgr", + "linear-bgr+alpha", + + "color-mapped-sRGB-gray", + "color-mapped-sRGB-gray+alpha", + "color-mapped-sRGB-bgr", + "color-mapped-sRGB-bgr+alpha", + "color-mapped-linear-gray", + "color-mapped-linear-gray+alpha", + "color-mapped-linear-bgr", + "color-mapped-linear-bgr+alpha", + + "sRGB-gray", + "alpha+sRGB-gray", + "sRGB-rgb", + "alpha+sRGB-rgb", + "linear-gray", + "alpha+linear-gray", + "linear-rgb", + "alpha+linear-rgb", + + "color-mapped-sRGB-gray", + "color-mapped-alpha+sRGB-gray", + "color-mapped-sRGB-rgb", + "color-mapped-alpha+sRGB-rgb", + "color-mapped-linear-gray", + "color-mapped-alpha+linear-gray", + "color-mapped-linear-rgb", + "color-mapped-alpha+linear-rgb", + + "sRGB-gray", + "alpha+sRGB-gray", + "sRGB-bgr", + "alpha+sRGB-bgr", + "linear-gray", + "alpha+linear-gray", + "linear-bgr", + "alpha+linear-bgr", + + "color-mapped-sRGB-gray", + "color-mapped-alpha+sRGB-gray", + "color-mapped-sRGB-bgr", + "color-mapped-alpha+sRGB-bgr", + "color-mapped-linear-gray", + "color-mapped-alpha+linear-gray", + "color-mapped-linear-bgr", + "color-mapped-alpha+linear-bgr", +}; + +/* Decode an argument to a format number. */ +static png_uint_32 +formatof(const char *arg) +{ + char *ep; + unsigned long format = strtoul(arg, &ep, 0); + + if (ep > arg && *ep == 0 && format < FORMAT_COUNT) + return (png_uint_32)format; + + else for (format=0; format < FORMAT_COUNT; ++format) + { + if (strcmp(format_names[format], arg) == 0) + return (png_uint_32)format; + } + + fprintf(stderr, "pngstest: format name '%s' invalid\n", arg); + return FORMAT_COUNT; +} + +/* Bitset/test functions for formats */ +#define FORMAT_SET_COUNT (FORMAT_COUNT / 32) +typedef struct +{ + png_uint_32 bits[FORMAT_SET_COUNT]; +} +format_list; + +static void format_init(format_list *pf) +{ + int i; + for (i=0; ibits[i] = 0; /* All off */ +} + +#if 0 /* currently unused */ +static void format_clear(format_list *pf) +{ + int i; + for (i=0; ibits[i] = 0; +} +#endif + +static int format_is_initial(format_list *pf) +{ + int i; + for (i=0; ibits[i] != 0) + return 0; + + return 1; +} + +static int format_set(format_list *pf, png_uint_32 format) +{ + if (format < FORMAT_COUNT) + return pf->bits[format >> 5] |= ((png_uint_32)1) << (format & 31); + + return 0; +} + +#if 0 /* currently unused */ +static int format_unset(format_list *pf, png_uint_32 format) +{ + if (format < FORMAT_COUNT) + return pf->bits[format >> 5] &= ~((png_uint_32)1) << (format & 31); + + return 0; +} +#endif + +static int format_isset(format_list *pf, png_uint_32 format) +{ + return format < FORMAT_COUNT && + (pf->bits[format >> 5] & (((png_uint_32)1) << (format & 31))) != 0; +} + +static void format_default(format_list *pf, int redundant) +{ + if (redundant) + { + int i; + + /* set everything, including flags that are pointless */ + for (i=0; ibits[i] = ~(png_uint_32)0; + } + + else + { + png_uint_32 f; + + for (f=0; finput_file != NULL) + rewind(image->input_file); +} + +/* Free the image buffer; the buffer is re-used on a re-read, this is just for + * cleanup. + */ +static void +freebuffer(Image *image) +{ + if (image->buffer) free(image->buffer); + image->buffer = NULL; + image->bufsize = 0; + image->allocsize = 0; +} + +/* Delete function; cleans out all the allocated data and the temporary file in + * the image. + */ +static void +freeimage(Image *image) +{ + freebuffer(image); + png_image_free(&image->image); + + if (image->input_file != NULL) + { + fclose(image->input_file); + image->input_file = NULL; + } + + if (image->input_memory != NULL) + { + free(image->input_memory); + image->input_memory = NULL; + image->input_memory_size = 0; + } + + if (image->tmpfile_name[0] != 0 && (image->opts & KEEP_TMPFILES) == 0) + { + remove(image->tmpfile_name); + image->tmpfile_name[0] = 0; + } +} + +/* This is actually a re-initializer; allows an image structure to be re-used by + * freeing everything that relates to an old image. + */ +static void initimage(Image *image, png_uint_32 opts, const char *file_name, + int stride_extra) +{ + freeimage(image); + memset(&image->image, 0, sizeof image->image); + image->opts = opts; + image->file_name = file_name; + image->stride_extra = stride_extra; +} + +/* Make sure the image buffer is big enough; allows re-use of the buffer if the + * image is re-read. + */ +#define BUFFER_INIT8 73 +static void +allocbuffer(Image *image) +{ + png_size_t size = PNG_IMAGE_BUFFER_SIZE(image->image, image->stride); + + if (size+32 > image->bufsize) + { + freebuffer(image); + image->buffer = voidcast(png_bytep, malloc(size+32)); + if (image->buffer == NULL) + { + fflush(stdout); + fprintf(stderr, + "simpletest: out of memory allocating %lu(+32) byte buffer\n", + (unsigned long)size); + exit(1); + } + image->bufsize = size+32; + } + + memset(image->buffer, 95, image->bufsize); + memset(image->buffer+16, BUFFER_INIT8, size); + image->allocsize = size; +} + +/* Make sure 16 bytes match the given byte. */ +static int +check16(png_const_bytep bp, int b) +{ + int i = 16; + + do + if (*bp != b) return 1; + while (--i); + + return 0; +} + +/* Check for overwrite in the image buffer. */ +static void +checkbuffer(Image *image, const char *arg) +{ + if (check16(image->buffer, 95)) + { + fflush(stdout); + fprintf(stderr, "%s: overwrite at start of image buffer\n", arg); + exit(1); + } + + if (check16(image->buffer+16+image->allocsize, 95)) + { + fflush(stdout); + fprintf(stderr, "%s: overwrite at end of image buffer\n", arg); + exit(1); + } +} + +/* ERROR HANDLING */ +/* Log a terminal error, also frees the libpng part of the image if necessary. + */ +static int +logerror(Image *image, const char *a1, const char *a2, const char *a3) +{ + fflush(stdout); + if (image->image.warning_or_error) + fprintf(stderr, "%s%s%s: %s\n", a1, a2, a3, image->image.message); + + else + fprintf(stderr, "%s%s%s\n", a1, a2, a3); + + if (image->image.opaque != NULL) + { + fprintf(stderr, "%s: image opaque pointer non-NULL on error\n", + image->file_name); + png_image_free(&image->image); + } + + return 0; +} + +/* Log an error and close a file (just a utility to do both things in one + * function call.) + */ +static int +logclose(Image *image, FILE *f, const char *name, const char *operation) +{ + int e = errno; + + fclose(f); + return logerror(image, name, operation, strerror(e)); +} + +/* Make sure the png_image has been freed - validates that libpng is doing what + * the spec says and freeing the image. + */ +static int +checkopaque(Image *image) +{ + if (image->image.opaque != NULL) + { + png_image_free(&image->image); + return logerror(image, image->file_name, ": opaque not NULL", ""); + } + + else if (image->image.warning_or_error != 0 && (image->opts & STRICT) != 0) + return logerror(image, image->file_name, " --strict", ""); + + else + return 1; +} + +/* IMAGE COMPARISON/CHECKING */ +/* Compare the pixels of two images, which should be the same but aren't. The + * images must have been checked for a size match. + */ +typedef struct +{ + /* The components, for grayscale images the gray value is in 'g' and if alpha + * is not present 'a' is set to 255 or 65535 according to format. + */ + int r, g, b, a; +} Pixel; + +typedef struct +{ + /* The background as the original sRGB 8-bit value converted to the final + * integer format and as a double precision linear value in the range 0..1 + * for with partially transparent pixels. + */ + int ir, ig, ib; + double dr, dg, db; /* linear r,g,b scaled to 0..1 */ +} Background; + +/* Basic image formats; control the data but not the layout thereof. */ +#define BASE_FORMATS\ + (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_LINEAR) + +/* Read a Pixel from a buffer. The code below stores the correct routine for + * the format in a function pointer, these are the routines: + */ +static void +gp_g8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[0]; + p->a = 255; +} + +static void +gp_ga8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[0]; + p->a = pp[1]; +} + +static void +gp_ag8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[1]; + p->a = pp[0]; +} + +static void +gp_rgb8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = 255; +} + +static void +gp_bgr8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = 255; +} + +static void +gp_rgba8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = pp[3]; +} + +static void +gp_bgra8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = pp[3]; +} + +static void +gp_argb8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[1]; + p->g = pp[2]; + p->b = pp[3]; + p->a = pp[0]; +} + +static void +gp_abgr8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[3]; + p->g = pp[2]; + p->b = pp[1]; + p->a = pp[0]; +} + +static void +gp_g16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[0]; + p->a = 65535; +} + +static void +gp_ga16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[0]; + p->a = pp[1]; +} + +static void +gp_ag16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[1]; + p->a = pp[0]; +} + +static void +gp_rgb16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = 65535; +} + +static void +gp_bgr16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = 65535; +} + +static void +gp_rgba16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = pp[3]; +} + +static void +gp_bgra16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = pp[3]; +} + +static void +gp_argb16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[1]; + p->g = pp[2]; + p->b = pp[3]; + p->a = pp[0]; +} + +static void +gp_abgr16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[3]; + p->g = pp[2]; + p->b = pp[1]; + p->a = pp[0]; +} + +/* Given a format, return the correct one of the above functions. */ +static void (* +get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb) +{ + /* The color-map flag is irrelevant here - the caller of the function + * returned must either pass the buffer or, for a color-mapped image, the + * correct entry in the color-map. + */ + if (format & PNG_FORMAT_FLAG_LINEAR) + { + if (format & PNG_FORMAT_FLAG_COLOR) + { + if (format & PNG_FORMAT_FLAG_BGR) + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_abgr16; + + else + return gp_bgra16; + } + + else + return gp_bgr16; + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_argb16; + + else + return gp_rgba16; + } + + else + return gp_rgb16; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_ag16; + + else + return gp_ga16; + } + + else + return gp_g16; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_COLOR) + { + if (format & PNG_FORMAT_FLAG_BGR) + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_abgr8; + + else + return gp_bgra8; + } + + else + return gp_bgr8; + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_argb8; + + else + return gp_rgba8; + } + + else + return gp_rgb8; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_ag8; + + else + return gp_ga8; + } + + else + return gp_g8; + } + } +} + +/* Convertion between pixel formats. The code above effectively eliminates the + * component ordering changes leaving three basic changes: + * + * 1) Remove an alpha channel by pre-multiplication or compositing on a + * background color. (Adding an alpha channel is a no-op.) + * + * 2) Remove color by mapping to grayscale. (Grayscale to color is a no-op.) + * + * 3) Convert between 8-bit and 16-bit components. (Both directtions are + * relevant.) + * + * This gives the following base format convertion matrix: + * + * OUT: ----- 8-bit ----- ----- 16-bit ----- + * IN G GA RGB RGBA G GA RGB RGBA + * 8 G . . . . lin lin lin lin + * 8 GA bckg . bckc . pre' pre pre' pre + * 8 RGB g8 g8 . . glin glin lin lin + * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre + * 16 G sRGB sRGB sRGB sRGB . . . . + * 16 GA b16g unpg b16c unpc A . A . + * 16 RGB sG sG sRGB sRGB g16 g16 . . + * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . + * + * 8-bit to 8-bit: + * bckg: composite on gray background + * bckc: composite on color background + * g8: convert sRGB components to sRGB grayscale + * g8b: convert sRGB components to grayscale and composite on gray background + * + * 8-bit to 16-bit: + * lin: make sRGB components linear, alpha := 65535 + * pre: make sRGB components linear and premultiply by alpha (scale alpha) + * pre': as 'pre' but alpha := 65535 + * glin: make sRGB components linear, convert to grayscale, alpha := 65535 + * gpre: make sRGB components grayscale and linear and premultiply by alpha + * gpr': as 'gpre' but alpha := 65535 + * + * 16-bit to 8-bit: + * sRGB: convert linear components to sRGB, alpha := 255 + * unpg: unpremultiply gray component and convert to sRGB (scale alpha) + * unpc: unpremultiply color components and convert to sRGB (scale alpha) + * b16g: composite linear onto gray background and convert the result to sRGB + * b16c: composite linear onto color background and convert the result to sRGB + * sG: convert linear RGB to sRGB grayscale + * sGp: unpremultiply RGB then convert to sRGB grayscale + * sCp: unpremultiply RGB then convert to sRGB + * gb16: composite linear onto background and convert to sRGB grayscale + * (order doesn't matter, the composite and grayscale operations permute) + * cb16: composite linear onto background and convert to sRGB + * + * 16-bit to 16-bit: + * A: set alpha to 65535 + * g16: convert linear RGB to linear grayscale (alpha := 65535) + * g16': as 'g16' but alpha is unchanged + */ +/* Simple copy: */ +static void +gpc_noop(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = in->r; + out->g = in->g; + out->b = in->b; + out->a = in->a; +} + +#if ALLOW_UNUSED_GPC +static void +gpc_nop8(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + if (in->a == 0) + out->r = out->g = out->b = 255; + + else + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + out->a = in->a; +} +#endif + +#if ALLOW_UNUSED_GPC +static void +gpc_nop6(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + if (in->a == 0) + out->r = out->g = out->b = 65535; + + else + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + out->a = in->a; +} +#endif + +/* 8-bit to 8-bit convertions */ +/* bckg: composite on gray background */ +static void +gpc_bckg(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 255) + out->r = out->g = out->b = in->g; + + else + { + double a = in->a / 255.; + + out->r = out->g = out->b = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); + } + + out->a = 255; +} + +/* bckc: composite on color background */ +static void +gpc_bckc(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else if (in->a >= 255) + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + else + { + double a = in->a / 255.; + + out->r = sRGB(sRGB_to_d[in->r] * a + back->dr * (1-a)); + out->g = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); + out->b = sRGB(sRGB_to_d[in->b] * a + back->db * (1-a)); + } + + out->a = 255; +} + +/* g8: convert sRGB components to sRGB grayscale */ +static void +gpc_g8(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = in->g; + + else + out->r = out->g = out->b = + sRGB(YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = in->a; +} + +/* g8b: convert sRGB components to grayscale and composite on gray background */ +static void +gpc_g8b(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 255) + { + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = in->g; + + else + out->r = out->g = out->b = sRGB(YfromRGB( + sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + } + + else + { + double a = in->a/255.; + + out->r = out->g = out->b = sRGB(a * YfromRGB(sRGB_to_d[in->r], + sRGB_to_d[in->g], sRGB_to_d[in->b]) + back->dg * (1-a)); + } + + out->a = 255; +} + +/* 8-bit to 16-bit convertions */ +/* lin: make sRGB components linear, alpha := 65535 */ +static void +gpc_lin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilinear(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilinear(in->b); + } + + else + { + out->g = ilinear(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilinear(in->b); + } + + out->a = 65535; +} + +/* pre: make sRGB components linear and premultiply by alpha (scale alpha) */ +static void +gpc_pre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara(in->b, in->a); + } + + else + { + out->g = ilineara(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara(in->b, in->a); + } + + out->a = in->a * 257; +} + +/* pre': as 'pre' but alpha := 65535 */ +static void +gpc_preq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara(in->b, in->a); + } + + else + { + out->g = ilineara(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara(in->b, in->a); + } + + out->a = 65535; +} + +/* glin: make sRGB components linear, convert to grayscale, alpha := 65535 */ +static void +gpc_glin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilinear(in->g); + + else + out->r = out->g = out->b = u16d(65535 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 65535; +} + +/* gpre: make sRGB components grayscale and linear and premultiply by alpha */ +static void +gpc_gpre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 257 * in->a; +} + +/* gpr': as 'gpre' but alpha := 65535 */ +static void +gpc_gprq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 65535; +} + +/* 8-bit to 16-bit convertions for gAMA 45455 encoded values */ +/* Lin: make gAMA 45455 components linear, alpha := 65535 */ +static void +gpc_Lin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilinear_g22(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilinear_g22(in->b); + } + + else + { + out->g = ilinear_g22(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilinear_g22(in->b); + } + + out->a = 65535; +} + +#if ALLOW_UNUSED_GPC +/* Pre: make gAMA 45455 components linear and premultiply by alpha (scale alpha) + */ +static void +gpc_Pre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara_g22(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara_g22(in->b, in->a); + } + + else + { + out->g = ilineara_g22(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara_g22(in->b, in->a); + } + + out->a = in->a * 257; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Pre': as 'Pre' but alpha := 65535 */ +static void +gpc_Preq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara_g22(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara_g22(in->b, in->a); + } + + else + { + out->g = ilineara_g22(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara_g22(in->b, in->a); + } + + out->a = 65535; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Glin: make gAMA 45455 components linear, convert to grayscale, alpha := 65535 + */ +static void +gpc_Glin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilinear_g22(in->g); + + else + out->r = out->g = out->b = u16d(65535 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 65535; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Gpre: make gAMA 45455 components grayscale and linear and premultiply by + * alpha. + */ +static void +gpc_Gpre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara_g22(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 257 * in->a; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Gpr': as 'Gpre' but alpha := 65535 */ +static void +gpc_Gprq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara_g22(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 65535; +} +#endif + +/* 16-bit to 8-bit convertions */ +/* sRGB: convert linear components to sRGB, alpha := 255 */ +static void +gpc_sRGB(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = isRGB(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = isRGB(in->b); + } + + else + { + out->g = isRGB(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = isRGB(in->b); + } + + out->a = 255; +} + +/* unpg: unpremultiply gray component and convert to sRGB (scale alpha) */ +static void +gpc_unpg(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = out->g = out->b = sRGB((double)in->g / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* unpc: unpremultiply color components and convert to sRGB (scale alpha) */ +static void +gpc_unpc(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = sRGB((double)in->r / in->a); + out->g = sRGB((double)in->g / in->a); + out->b = sRGB((double)in->b / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* b16g: composite linear onto gray background and convert the result to sRGB */ +static void +gpc_b16g(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else + { + double a = in->a/65535.; + double a1 = 1-a; + + a /= 65535; + out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); + } + + out->a = 255; +} + +/* b16c: composite linear onto color background and convert the result to sRGB*/ +static void +gpc_b16c(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else + { + double a = in->a/65535.; + double a1 = 1-a; + + a /= 65535; + out->r = sRGB(in->r * a + back->dr * a1); + out->g = sRGB(in->g * a + back->dg * a1); + out->b = sRGB(in->b * a + back->db * a1); + } + + out->a = 255; +} + +/* sG: convert linear RGB to sRGB grayscale */ +static void +gpc_sG(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/65535); + out->a = 255; +} + +/* sGp: unpremultiply RGB then convert to sRGB grayscale */ +static void +gpc_sGp(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/in->a); + out->a = u8d(in->a / 257.); + } +} + +/* sCp: unpremultiply RGB then convert to sRGB */ +static void +gpc_sCp(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = sRGB((double)in->r / in->a); + out->g = sRGB((double)in->g / in->a); + out->b = sRGB((double)in->b / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* gb16: composite linear onto background and convert to sRGB grayscale */ +/* (order doesn't matter, the composite and grayscale operations permute) */ +static void +gpc_gb16(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 65535) + out->r = out->g = out->b = isRGB(in->g); + + else + { + double a = in->a / 65535.; + double a1 = 1-a; + + a /= 65535; + out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); + } + + out->a = 255; +} + +/* cb16: composite linear onto background and convert to sRGB */ +static void +gpc_cb16(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else if (in->a >= 65535) + { + out->r = isRGB(in->r); + out->g = isRGB(in->g); + out->b = isRGB(in->b); + } + + else + { + double a = in->a / 65535.; + double a1 = 1-a; + + a /= 65535; + out->r = sRGB(in->r * a + back->dr * a1); + out->g = sRGB(in->g * a + back->dg * a1); + out->b = sRGB(in->b * a + back->db * a1); + } + + out->a = 255; +} + +/* 16-bit to 16-bit convertions */ +/* A: set alpha to 65535 */ +static void +gpc_A(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = in->r; + out->g = in->g; + out->b = in->b; + out->a = 65535; +} + +/* g16: convert linear RGB to linear grayscale (alpha := 65535) */ +static void +gpc_g16(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); + out->a = 65535; +} + +/* g16': as 'g16' but alpha is unchanged */ +static void +gpc_g16q(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); + out->a = in->a; +} + +#if ALLOW_UNUSED_GPC +/* Unused functions (to hide them from GCC unused function warnings) */ +void (* const gpc_unused[]) + (Pixel *out, const Pixel *in, const Background *back) = +{ + gpc_Pre, gpc_Preq, gpc_Glin, gpc_Gpre, gpc_Gprq, gpc_nop8, gpc_nop6 +}; +#endif + +/* OUT: ----- 8-bit ----- ----- 16-bit ----- + * IN G GA RGB RGBA G GA RGB RGBA + * 8 G . . . . lin lin lin lin + * 8 GA bckg . bckc . pre' pre pre' pre + * 8 RGB g8 g8 . . glin glin lin lin + * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre + * 16 G sRGB sRGB sRGB sRGB . . . . + * 16 GA b16g unpg b16c unpc A . A . + * 16 RGB sG sG sRGB sRGB g16 g16 . . + * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . + * + * The matrix is held in an array indexed thus: + * + * gpc_fn[out_format & BASE_FORMATS][in_format & BASE_FORMATS]; + */ +/* This will produce a compile time error if the FORMAT_FLAG values don't + * match the above matrix! + */ +#if PNG_FORMAT_FLAG_ALPHA == 1 && PNG_FORMAT_FLAG_COLOR == 2 &&\ + PNG_FORMAT_FLAG_LINEAR == 4 +static void (* const gpc_fn[8/*in*/][8/*out*/]) + (Pixel *out, const Pixel *in, const Background *back) = +{ +/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ + {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_Lin, gpc_Lin, gpc_Lin, gpc_Lin }, + {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, + {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, + {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, + {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, + {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, + {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, + {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} +}; + +/* The array is repeated for the cases where both the input and output are color + * mapped because then different algorithms are used. + */ +static void (* const gpc_fn_colormapped[8/*in*/][8/*out*/]) + (Pixel *out, const Pixel *in, const Background *back) = +{ +/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ + {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_lin, gpc_lin, gpc_lin, gpc_lin }, + {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, + {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, + {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, + {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, + {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, + {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, + {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} +}; + +/* The error arrays record the error in the same matrix; 64 entries, however + * the different algorithms used in libpng for colormap and direct convertions + * mean that four separate matrices are used (for each combination of + * colormapped and direct.) + * + * In some cases the convertion between sRGB formats goes via a linear + * intermediate; an sRGB to linear convertion (as above) is followed by a simple + * linear to sRGB step with no other convertions. This is done by a separate + * error array from an arbitrary 'in' format to one of the four basic outputs + * (since final output is always sRGB not colormapped). + * + * These arrays may be modified if the --accumulate flag is set during the run; + * then instead of logging errors they are simply added in. + * + * The three entries are currently for transparent, partially transparent and + * opaque input pixel values. Notice that alpha should be exact in each case. + * + * Errors in alpha should only occur when converting from a direct format + * to a colormapped format, when alpha is effectively smashed (so large + * errors can occur.) There should be no error in the '0' and 'opaque' + * values. The fourth entry in the array is used for the alpha error (and it + * should always be zero for the 'via linear' case since this is never color + * mapped.) + * + * Mapping to a colormap smashes the colors, it is necessary to have separate + * values for these cases because they are much larger; it is very much + * impossible to obtain a reasonable result, these are held in + * gpc_error_to_colormap. + */ +#if PNG_FORMAT_FLAG_COLORMAP == 8 /* extra check also required */ +/* START MACHINE GENERATED */ +static png_uint_16 gpc_error[16/*in*/][16/*out*/][4/*a*/] = +{ + { /* input: sRGB-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: sRGB-gray+alpha */ + { 0, 18, 0, 0 }, { 0, 0, 0, 0 }, { 0, 20, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: sRGB-rgb */ + { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 893, 0 }, { 0, 0, 893, 0 }, { 0, 0, 811, 0 }, { 0, 0, 811, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: sRGB-rgb+alpha */ + { 0, 4, 13, 0 }, { 0, 14, 13, 0 }, { 0, 19, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 832, 764, 0 }, { 0, 832, 764, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: linear-gray */ + { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: linear-gray+alpha */ + { 0, 74, 9, 0 }, { 0, 20, 9, 0 }, { 0, 74, 9, 0 }, { 0, 20, 9, 0 }, + { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: linear-rgb */ + { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, + { 0, 0, 4, 0 }, { 0, 0, 4, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: linear-rgb+alpha */ + { 0, 126, 143, 0 }, { 0, 9, 7, 0 }, { 0, 74, 9, 0 }, { 0, 16, 9, 0 }, + { 0, 4, 4, 0 }, { 0, 5, 4, 0 }, { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-gray+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-rgb */ + { 0, 0, 13, 0 }, { 0, 0, 13, 0 }, { 0, 0, 8, 0 }, { 0, 0, 8, 0 }, + { 0, 0, 673, 0 }, { 0, 0, 673, 0 }, { 0, 0, 674, 0 }, { 0, 0, 674, 0 }, + { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 460, 0 }, { 0, 0, 460, 0 }, { 0, 0, 263, 0 }, { 0, 0, 263, 0 } + }, { /* input: color-mapped-sRGB-rgb+alpha */ + { 0, 6, 8, 0 }, { 0, 7, 8, 0 }, { 0, 75, 8, 0 }, { 0, 9, 8, 0 }, + { 0, 585, 427, 0 }, { 0, 585, 427, 0 }, { 0, 717, 409, 0 }, { 0, 717, 409, 0 }, + { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 13323, 460, 0 }, { 0, 334, 460, 0 }, { 0, 16480, 263, 0 }, { 0, 243, 263, 0 } + }, { /* input: color-mapped-linear-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 282, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-gray+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 253, 282, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-rgb */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 265, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-rgb+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 243, 265, 0 } + } +}; +static png_uint_16 gpc_error_via_linear[16][4/*out*/][4] = +{ + { /* input: sRGB-gray */ + { 0, 0, 7, 0 }, { 0, 0, 7, 0 }, { 0, 0, 7, 0 }, { 0, 0, 7, 0 } + }, { /* input: sRGB-gray+alpha */ + { 0, 15, 15, 0 }, { 0, 186, 15, 0 }, { 0, 15, 15, 0 }, { 0, 186, 15, 0 } + }, { /* input: sRGB-rgb */ + { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 15, 0 }, { 0, 0, 15, 0 } + }, { /* input: sRGB-rgb+alpha */ + { 0, 12, 14, 0 }, { 0, 180, 14, 0 }, { 0, 14, 15, 0 }, { 0, 186, 15, 0 } + }, { /* input: linear-gray */ + { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 } + }, { /* input: linear-gray+alpha */ + { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 } + }, { /* input: linear-rgb */ + { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 } + }, { /* input: linear-rgb+alpha */ + { 0, 1, 1, 0 }, { 0, 8, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 } + }, { /* input: color-mapped-sRGB-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-gray+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-rgb */ + { 0, 0, 13, 0 }, { 0, 0, 13, 0 }, { 0, 0, 14, 0 }, { 0, 0, 14, 0 } + }, { /* input: color-mapped-sRGB-rgb+alpha */ + { 0, 4, 8, 0 }, { 0, 9, 8, 0 }, { 0, 8, 3, 0 }, { 0, 32, 3, 0 } + }, { /* input: color-mapped-linear-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-gray+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-rgb */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-rgb+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + } +}; +static png_uint_16 gpc_error_to_colormap[8/*i*/][8/*o*/][4] = +{ + { /* input: sRGB-gray */ + { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, + { 0, 0, 560, 0 }, { 0, 0, 560, 0 }, { 0, 0, 560, 0 }, { 0, 0, 560, 0 } + }, { /* input: sRGB-gray+alpha */ + { 0, 19, 2, 0 }, { 0, 255, 2, 25 }, { 0, 88, 2, 0 }, { 0, 255, 2, 25 }, + { 0, 1012, 745, 0 }, { 0, 16026, 745, 6425 }, { 0, 1012, 745, 0 }, { 0, 16026, 745, 6425 } + }, { /* input: sRGB-rgb */ + { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 25, 0 }, { 0, 0, 25, 0 }, + { 0, 0, 937, 0 }, { 0, 0, 937, 0 }, { 0, 0, 13677, 0 }, { 0, 0, 13677, 0 } + }, { /* input: sRGB-rgb+alpha */ + { 0, 63, 77, 0 }, { 0, 255, 19, 25 }, { 0, 220, 25, 0 }, { 0, 255, 25, 67 }, + { 0, 17534, 18491, 0 }, { 0, 15614, 2824, 6425 }, { 0, 14019, 13677, 0 }, { 0, 48573, 13677, 17219 } + }, { /* input: linear-gray */ + { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, + { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 } + }, { /* input: linear-gray+alpha */ + { 0, 74, 74, 0 }, { 0, 255, 74, 25 }, { 0, 97, 74, 0 }, { 0, 255, 74, 25 }, + { 0, 18919, 18907, 0 }, { 0, 24549, 18907, 6552 }, { 0, 18919, 18907, 0 }, { 0, 24549, 18907, 6552 } + }, { /* input: linear-rgb */ + { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 98, 0 }, { 0, 0, 98, 0 }, + { 0, 0, 18664, 0 }, { 0, 0, 18664, 0 }, { 0, 0, 24998, 0 }, { 0, 0, 24998, 0 } + }, { /* input: linear-rgb+alpha */ + { 0, 181, 196, 0 }, { 0, 255, 61, 25 }, { 206, 187, 98, 0 }, { 0, 255, 98, 67 }, + { 0, 18141, 18137, 0 }, { 0, 17494, 17504, 6553 }, { 0, 24979, 24992, 0 }, { 0, 46509, 24992, 17347 } + } +}; +/* END MACHINE GENERATED */ +#endif /* COLORMAP flag check */ +#endif /* flag checks */ + +typedef struct +{ + /* Basic pixel information: */ + Image* in_image; /* Input image */ + const Image* out_image; /* Output image */ + + /* 'background' is the value passed to the gpc_ routines, it may be NULL if + * it should not be used (*this* program has an error if it crashes as a + * result!) + */ + Background background_color; + const Background* background; + + /* Precalculated values: */ + int in_opaque; /* Value of input alpha that is opaque */ + int is_palette; /* Sample values come from the palette */ + int accumulate; /* Accumlate component errors (don't log) */ + int output_8bit; /* Output is 8 bit (else 16 bit) */ + + void (*in_gp)(Pixel*, png_const_voidp); + void (*out_gp)(Pixel*, png_const_voidp); + + void (*transform)(Pixel *out, const Pixel *in, const Background *back); + /* A function to perform the required transform */ + + void (*from_linear)(Pixel *out, const Pixel *in, const Background *back); + /* For 'via_linear' transforms the final, from linear, step, else NULL */ + + png_uint_16 error[4]; + /* Three error values for transparent, partially transparent and opaque + * input pixels (in turn). + */ + + png_uint_16 *error_ptr; + /* Where these are stored in the static array (for 'accumulate') */ +} +Transform; + +/* Return a 'transform' as above for the given format convertion. */ +static void +transform_from_formats(Transform *result, Image *in_image, + const Image *out_image, png_const_colorp background, int via_linear) +{ + png_uint_32 in_format, out_format; + png_uint_32 in_base, out_base; + + memset(result, 0, sizeof *result); + + /* Store the original images for error messages */ + result->in_image = in_image; + result->out_image = out_image; + + in_format = in_image->image.format; + out_format = out_image->image.format; + + if (in_format & PNG_FORMAT_FLAG_LINEAR) + result->in_opaque = 65535; + else + result->in_opaque = 255; + + result->output_8bit = (out_format & PNG_FORMAT_FLAG_LINEAR) == 0; + + result->is_palette = 0; /* set by caller if required */ + result->accumulate = (in_image->opts & ACCUMULATE) != 0; + + /* The loaders (which need the ordering information) */ + result->in_gp = get_pixel(in_format); + result->out_gp = get_pixel(out_format); + + /* Remove the ordering information: */ + in_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; + in_base = in_format & BASE_FORMATS; + out_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; + out_base = out_format & BASE_FORMATS; + + if (via_linear) + { + /* Check for an error in this program: */ + if (out_format & (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLORMAP)) + { + fprintf(stderr, "internal transform via linear error 0x%x->0x%x\n", + in_format, out_format); + exit(1); + } + + result->transform = gpc_fn[in_base][out_base | PNG_FORMAT_FLAG_LINEAR]; + result->from_linear = gpc_fn[out_base | PNG_FORMAT_FLAG_LINEAR][out_base]; + result->error_ptr = gpc_error_via_linear[in_format][out_format]; + } + + else if (~in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) + { + /* The input is not colormapped but the output is, the errors will + * typically be large (only the grayscale-no-alpha case permits preserving + * even 8-bit values.) + */ + result->transform = gpc_fn[in_base][out_base]; + result->from_linear = NULL; + result->error_ptr = gpc_error_to_colormap[in_base][out_base]; + } + + else + { + /* The caller handles the colormap->pixel value convertion, so the + * transform function just gets a pixel value, however because libpng + * currently contains a different implementation for mapping a colormap if + * both input and output are colormapped we need different convertion + * functions to deal with errors in the libpng implementation. + */ + if (in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) + result->transform = gpc_fn_colormapped[in_base][out_base]; + else + result->transform = gpc_fn[in_base][out_base]; + result->from_linear = NULL; + result->error_ptr = gpc_error[in_format][out_format]; + } + + /* Follow the libpng simplified API rules to work out what to pass to the gpc + * routines as a background value, if one is not required pass NULL so that + * this program crashes in the even of a programming error. + */ + result->background = NULL; /* default: not required */ + + /* Rule 1: background only need be supplied if alpha is to be removed */ + if (in_format & ~out_format & PNG_FORMAT_FLAG_ALPHA) + { + /* The input value is 'NULL' to use the background and (otherwise) an sRGB + * background color (to use a solid color). The code above uses a fixed + * byte value, BUFFER_INIT8, for buffer even for 16-bit output. For + * linear (16-bit) output the sRGB background color is ignored; the + * composition is always on the background (so BUFFER_INIT8 * 257), except + * that for the colormap (i.e. linear colormapped output) black is used. + */ + result->background = &result->background_color; + + if (out_format & PNG_FORMAT_FLAG_LINEAR || via_linear) + { + if (out_format & PNG_FORMAT_FLAG_COLORMAP) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = 0; + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 0; + } + + else + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = BUFFER_INIT8 * 257; + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 0; + } + } + + else /* sRGB output */ + { + if (background != NULL) + { + if (out_format & PNG_FORMAT_FLAG_COLOR) + { + result->background_color.ir = background->red; + result->background_color.ig = background->green; + result->background_color.ib = background->blue; + /* TODO: sometimes libpng uses the power law convertion here, how + * to handle this? + */ + result->background_color.dr = sRGB_to_d[background->red]; + result->background_color.dg = sRGB_to_d[background->green]; + result->background_color.db = sRGB_to_d[background->blue]; + } + + else /* grayscale: libpng only looks at 'g' */ + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = background->green; + /* TODO: sometimes libpng uses the power law convertion here, how + * to handle this? + */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = sRGB_to_d[background->green]; + } + } + + else if ((out_format & PNG_FORMAT_FLAG_COLORMAP) == 0) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = BUFFER_INIT8; + /* TODO: sometimes libpng uses the power law convertion here, how + * to handle this? + */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = sRGB_to_d[BUFFER_INIT8]; + } + + /* Else the output is colormapped and a background color must be + * provided; if pngstest crashes then that is a bug in this program + * (though libpng should png_error as well.) + */ + else + result->background = NULL; + } + } + + if (result->background == NULL) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = -1; /* not used */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 1E30; /* not used */ + } + + + /* Copy the error values into the Transform: */ + result->error[0] = result->error_ptr[0]; + result->error[1] = result->error_ptr[1]; + result->error[2] = result->error_ptr[2]; + result->error[3] = result->error_ptr[3]; +} + + +/* Compare two pixels. + * + * OLD error values: +static int error_to_linear = 811; * by experiment * +static int error_to_linear_grayscale = 424; * by experiment * +static int error_to_sRGB = 6; * by experiment * +static int error_to_sRGB_grayscale = 17; * libpng error by calculation + + 2 by experiment * +static int error_in_compose = 2; * by experiment * +static int error_in_premultiply = 1; + * + * The following is *just* the result of a round trip from 8-bit sRGB to linear + * then back to 8-bit sRGB when it is done by libpng. There are two problems: + * + * 1) libpng currently uses a 2.2 power law with no linear segment, this results + * in instability in the low values and even with 16-bit precision sRGB(1) ends + * up mapping to sRGB(0) as a result of rounding in the 16-bit representation. + * This gives an error of 1 in the handling of value 1 only. + * + * 2) libpng currently uses an intermediate 8-bit linear value in gamma + * correction of 8-bit values. This results in many more errors, the worse of + * which is mapping sRGB(14) to sRGB(0). + * + * The general 'error_via_linear' is more complex because of pre-multiplication, + * this compounds the 8-bit errors according to the alpha value of the pixel. + * As a result 256 values are pre-calculated for error_via_linear. + */ +#if 0 +static int error_in_libpng_gamma; +static int error_via_linear[256]; /* Indexed by 8-bit alpha */ + +static void +init_error_via_linear(void) +{ + int alpha; + + error_via_linear[0] = 255; /* transparent pixel */ + + for (alpha=1; alpha<=255; ++alpha) + { + /* 16-bit values less than 128.5 get rounded to 8-bit 0 and so the worst + * case error arises with 16-bit 128.5, work out what sRGB + * (non-associated) value generates 128.5; any value less than this is + * going to map to 0, so the worst error is floor(value). + * + * Note that errors are considerably higher (more than a factor of 2) + * because libpng uses a simple power law for sRGB data at present. + * + * Add .1 for arithmetic errors inside libpng. + */ + double v = floor(255*pow(.5/*(128.5 * 255 / 65535)*/ / alpha, 1/2.2)+.1); + + error_via_linear[alpha] = (int)v; + } + + /* This is actually 14.99, but, despite the closeness to 15, 14 seems to work + * ok in this case. + */ + error_in_libpng_gamma = 14; +} +#endif + +static void +print_pixel(char string[64], const Pixel *pixel, png_uint_32 format) +{ + switch (format & (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR)) + { + case 0: + sprintf(string, "%s(%d)", format_names[format], pixel->g); + break; + + case PNG_FORMAT_FLAG_ALPHA: + sprintf(string, "%s(%d,%d)", format_names[format], pixel->g, + pixel->a); + break; + + case PNG_FORMAT_FLAG_COLOR: + sprintf(string, "%s(%d,%d,%d)", format_names[format], + pixel->r, pixel->g, pixel->b); + break; + + case PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA: + sprintf(string, "%s(%d,%d,%d,%d)", format_names[format], + pixel->r, pixel->g, pixel->b, pixel->a); + break; + + default: + sprintf(string, "invalid-format"); + break; + } +} + +static int +logpixel(const Transform *transform, png_uint_32 x, png_uint_32 y, + const Pixel *in, const Pixel *calc, const Pixel *out, const char *reason) +{ + const png_uint_32 in_format = transform->in_image->image.format; + const png_uint_32 out_format = transform->out_image->image.format; + + png_uint_32 back_format = out_format & ~PNG_FORMAT_FLAG_ALPHA; + const char *via_linear = ""; + + char pixel_in[64], pixel_calc[64], pixel_out[64], pixel_loc[64]; + char background_info[100]; + + print_pixel(pixel_in, in, in_format); + print_pixel(pixel_calc, calc, out_format); + print_pixel(pixel_out, out, out_format); + + if (transform->is_palette) + sprintf(pixel_loc, "palette: %lu", (unsigned long)y); + else + sprintf(pixel_loc, "%lu,%lu", (unsigned long)x, (unsigned long)y); + + if (transform->from_linear != NULL) + { + via_linear = " (via linear)"; + /* And as a result the *read* format which did any background processing + * was itself linear, so the background color information is also + * linear. + */ + back_format |= PNG_FORMAT_FLAG_LINEAR; + } + + if (transform->background != NULL) + { + Pixel back; + char pixel_back[64]; + + back.r = transform->background->ir; + back.g = transform->background->ig; + back.b = transform->background->ib; + back.a = -1; /* not used */ + + print_pixel(pixel_back, &back, back_format); + sprintf(background_info, " on background %s", pixel_back); + } + + else + background_info[0] = 0; + + if (transform->in_image->file_name != transform->out_image->file_name) + { + char error_buffer[512]; + sprintf(error_buffer, + "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" + "Use --preserve and examine: ", pixel_loc, reason, via_linear, + pixel_in, background_info, pixel_out, pixel_calc); + return logerror(transform->in_image, transform->in_image->file_name, + error_buffer, transform->out_image->file_name); + } + + else + { + char error_buffer[512]; + sprintf(error_buffer, + "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" + " The error happened when reading the original file with this format.", + pixel_loc, reason, via_linear, pixel_in, background_info, pixel_out, + pixel_calc); + return logerror(transform->in_image, transform->in_image->file_name, + error_buffer, ""); + } +} + +static int +cmppixel(Transform *transform, png_const_voidp in, png_const_voidp out, + png_uint_32 x, png_uint_32 y/*or palette index*/) +{ + int maxerr; + png_const_charp errmsg; + Pixel pixel_in, pixel_calc, pixel_out; + + transform->in_gp(&pixel_in, in); + + if (transform->from_linear == NULL) + transform->transform(&pixel_calc, &pixel_in, transform->background); + + else + { + transform->transform(&pixel_out, &pixel_in, transform->background); + transform->from_linear(&pixel_calc, &pixel_out, NULL); + } + + transform->out_gp(&pixel_out, out); + + /* Eliminate the case where the input and output values match exactly. */ + if (pixel_calc.a == pixel_out.a && pixel_calc.r == pixel_out.r && + pixel_calc.g == pixel_out.g && pixel_calc.b == pixel_out.b) + return 1; + + /* Eliminate the case where the output pixel is transparent and the output + * is 8-bit - any component values are valid. Don't check the input alpha + * here to also skip the 16-bit small alpha cases. + */ + if (transform->output_8bit && pixel_calc.a == 0 && pixel_out.a == 0) + return 1; + + /* Check for alpha errors first; an alpha error can damage the components too + * so avoid spurious checks on components if one is found. + */ + errmsg = NULL; + { + int err_a = abs(pixel_calc.a-pixel_out.a); + + if (err_a > transform->error[3]) + { + /* If accumulating check the components too */ + if (transform->accumulate) + transform->error[3] = (png_uint_16)err_a; + + else + errmsg = "alpha"; + } + } + + /* Now if *either* of the output alphas are 0 but alpha is within tolerance + * eliminate the 8-bit component comparison. + */ + if (errmsg == NULL && transform->output_8bit && + (pixel_calc.a == 0 || pixel_out.a == 0)) + return 1; + + if (errmsg == NULL) /* else just signal an alpha error */ + { + int err_r = abs(pixel_calc.r - pixel_out.r); + int err_g = abs(pixel_calc.g - pixel_out.g); + int err_b = abs(pixel_calc.b - pixel_out.b); + int limit; + + if ((err_r | err_g | err_b) == 0) + return 1; /* exact match */ + + /* Mismatch on a component, check the input alpha */ + if (pixel_in.a >= transform->in_opaque) + { + errmsg = "opaque component"; + limit = 2; /* opaque */ + } + + else if (pixel_in.a > 0) + { + errmsg = "alpha component"; + limit = 1; /* partially transparent */ + } + + else + { + errmsg = "transparent component (background)"; + limit = 0; /* transparent */ + } + + maxerr = err_r; + if (maxerr < err_g) maxerr = err_g; + if (maxerr < err_b) maxerr = err_b; + + if (maxerr <= transform->error[limit]) + return 1; /* within the error limits */ + + /* Handle a component mis-match; log it, just return an error code, or + * accumulate it. + */ + if (transform->accumulate) + { + transform->error[limit] = (png_uint_16)maxerr; + return 1; /* to cause the caller to keep going */ + } + } + + /* Failure to match and not accumulating, so the error must be logged. */ + return logpixel(transform, x, y, &pixel_in, &pixel_calc, &pixel_out, errmsg); +} + +static png_byte +component_loc(png_byte loc[4], png_uint_32 format) +{ + /* Given a format return the number of channels and the location of + * each channel. + * + * The mask 'loc' contains the component offset of the channels in the + * following order. Note that if 'format' is grayscale the entries 1-3 must + * all contain the location of the gray channel. + * + * 0: alpha + * 1: red or gray + * 2: green or gray + * 3: blue or gray + */ + png_byte channels; + + if (format & PNG_FORMAT_FLAG_COLOR) + { + channels = 3; + + loc[2] = 1; + + if (format & PNG_FORMAT_FLAG_BGR) + { + loc[1] = 2; + loc[3] = 0; + } + + else + { + loc[1] = 0; + loc[3] = 2; + } + } + + else + { + channels = 1; + loc[0] = loc[1] = loc[2] = 0; + } + + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + { + loc[0] = 0; + ++loc[1]; + ++loc[2]; + ++loc[3]; + } + + else + loc[0] = channels; + + ++channels; + } + + else + loc[0] = 4; /* not present */ + + return channels; +} + +/* Compare two images, the original 'a', which was written out then read back in + * to * give image 'b'. The formats may have been changed. + */ +static int +compare_two_images(Image *a, Image *b, int via_linear, + png_const_colorp background) +{ + ptrdiff_t stridea = a->stride; + ptrdiff_t strideb = b->stride; + png_const_bytep rowa = a->buffer+16; + png_const_bytep rowb = b->buffer+16; + const png_uint_32 width = a->image.width; + const png_uint_32 height = a->image.height; + const png_uint_32 formata = a->image.format; + const png_uint_32 formatb = b->image.format; + const unsigned int a_sample = PNG_IMAGE_SAMPLE_SIZE(formata); + const unsigned int b_sample = PNG_IMAGE_SAMPLE_SIZE(formatb); + int alpha_added, alpha_removed; + int bchannels; + int btoa[4]; + png_uint_32 y; + Transform tr; + + /* This should never happen: */ + if (width != b->image.width || height != b->image.height) + return logerror(a, a->file_name, ": width x height changed: ", + b->file_name); + + /* Set up the background and the transform */ + transform_from_formats(&tr, a, b, background, via_linear); + + /* Find the first row and inter-row space. */ + if (!(formata & PNG_FORMAT_FLAG_COLORMAP) && + (formata & PNG_FORMAT_FLAG_LINEAR)) + stridea *= 2; + + if (!(formatb & PNG_FORMAT_FLAG_COLORMAP) && + (formatb & PNG_FORMAT_FLAG_LINEAR)) + strideb *= 2; + + if (stridea < 0) rowa += (height-1) * (-stridea); + if (strideb < 0) rowb += (height-1) * (-strideb); + + /* First shortcut the two colormap case by comparing the image data; if it + * matches then we expect the colormaps to match, although this is not + * absolutely necessary for an image match. If the colormaps fail to match + * then there is a problem in libpng. + */ + if (formata & formatb & PNG_FORMAT_FLAG_COLORMAP) + { + /* Only check colormap entries that actually exist; */ + png_const_bytep ppa, ppb; + int match; + png_byte in_use[256], amax = 0, bmax = 0; + + memset(in_use, 0, sizeof in_use); + + ppa = rowa; + ppb = rowb; + + /* Do this the slow way to accumulate the 'in_use' flags, don't break out + * of the loop until the end; this validates the color-mapped data to + * ensure all pixels are valid color-map indexes. + */ + for (y=0, match=1; y bmax) + bmax = bval; + + if (bval != aval) + match = 0; + + in_use[aval] = 1; + if (aval > amax) + amax = aval; + } + } + + /* If the buffers match then the colormaps must too. */ + if (match) + { + /* Do the color-maps match, entry by entry? Only check the 'in_use' + * entries. An error here should be logged as a color-map error. + */ + png_const_bytep a_cmap = (png_const_bytep)a->colormap; + png_const_bytep b_cmap = (png_const_bytep)b->colormap; + int result = 1; /* match by default */ + + /* This is used in logpixel to get the error message correct. */ + tr.is_palette = 1; + + for (y=0; y<256; ++y, a_cmap += a_sample, b_cmap += b_sample) + if (in_use[y]) + { + /* The colormap entries should be valid, but because libpng doesn't + * do any checking at present the original image may contain invalid + * pixel values. These cause an error here (at present) unless + * accumulating errors in which case the program just ignores them. + */ + if (y >= a->image.colormap_entries) + { + if ((a->opts & ACCUMULATE) == 0) + { + char pindex[9]; + sprintf(pindex, "%lu[%lu]", (unsigned long)y, + (unsigned long)a->image.colormap_entries); + logerror(a, a->file_name, ": bad pixel index: ", pindex); + } + result = 0; + } + + else if (y >= b->image.colormap_entries) + { + if ((a->opts & ACCUMULATE) == 0) + { + char pindex[9]; + sprintf(pindex, "%lu[%lu]", (unsigned long)y, + (unsigned long)b->image.colormap_entries); + logerror(b, b->file_name, ": bad pixel index: ", pindex); + } + result = 0; + } + + /* All the mismatches are logged here; there can only be 256! */ + else if (!cmppixel(&tr, a_cmap, b_cmap, 0, y)) + result = 0; + } + + /* If reqested copy the error values back from the Transform. */ + if (a->opts & ACCUMULATE) + { + tr.error_ptr[0] = tr.error[0]; + tr.error_ptr[1] = tr.error[1]; + tr.error_ptr[2] = tr.error[2]; + tr.error_ptr[3] = tr.error[3]; + result = 1; /* force a continue */ + } + + return result; + } + + /* else the image buffers don't match pixel-wise so compare sample values + * instead, but first validate that the pixel indexes are in range (but + * only if not accumulating, when the error is ignored.) + */ + else if ((a->opts & ACCUMULATE) == 0) + { + /* Check the original image first, + * TODO: deal with input images with bad pixel values? + */ + if (amax >= a->image.colormap_entries) + { + char pindex[9]; + sprintf(pindex, "%d[%lu]", amax, + (unsigned long)a->image.colormap_entries); + return logerror(a, a->file_name, ": bad pixel index: ", pindex); + } + + else if (bmax >= b->image.colormap_entries) + { + char pindex[9]; + sprintf(pindex, "%d[%lu]", bmax, + (unsigned long)b->image.colormap_entries); + return logerror(b, b->file_name, ": bad pixel index: ", pindex); + } + } + } + + /* We can directly compare pixel values without the need to use the read + * or transform support (i.e. a memory compare) if: + * + * 1) The bit depth has not changed. + * 2) RGB to grayscale has not been done (the reverse is ok; we just compare + * the three RGB values to the original grayscale.) + * 3) An alpha channel has not been removed from an 8-bit format, or the + * 8-bit alpha value of the pixel was 255 (opaque). + * + * If an alpha channel has been *added* then it must have the relevant opaque + * value (255 or 65535). + * + * The fist two the tests (in the order given above) (using the boolean + * equivalence !a && !b == !(a || b)) + */ + if (!(((formata ^ formatb) & PNG_FORMAT_FLAG_LINEAR) | + (formata & (formatb ^ PNG_FORMAT_FLAG_COLOR) & PNG_FORMAT_FLAG_COLOR))) + { + /* Was an alpha channel changed? */ + const png_uint_32 alpha_changed = (formata ^ formatb) & + PNG_FORMAT_FLAG_ALPHA; + + /* Was an alpha channel removed? (The third test.) If so the direct + * comparison is only possible if the input alpha is opaque. + */ + alpha_removed = (formata & alpha_changed) != 0; + + /* Was an alpha channel added? */ + alpha_added = (formatb & alpha_changed) != 0; + + /* The channels may have been moved between input and output, this finds + * out how, recording the result in the btoa array, which says where in + * 'a' to find each channel of 'b'. If alpha was added then btoa[alpha] + * ends up as 4 (and is not used.) + */ + { + int i; + png_byte aloc[4]; + png_byte bloc[4]; + + /* The following are used only if the formats match, except that + * 'bchannels' is a flag for matching formats. btoa[x] says, for each + * channel in b, where to find the corresponding value in a, for the + * bchannels. achannels may be different for a gray to rgb transform + * (a will be 1 or 2, b will be 3 or 4 channels.) + */ + (void)component_loc(aloc, formata); + bchannels = component_loc(bloc, formatb); + + /* Hence the btoa array. */ + for (i=0; i<4; ++i) if (bloc[i] < 4) + btoa[bloc[i]] = aloc[i]; /* may be '4' for alpha */ + + if (alpha_added) + alpha_added = bloc[0]; /* location of alpha channel in image b */ + + else + alpha_added = 4; /* Won't match an image b channel */ + + if (alpha_removed) + alpha_removed = aloc[0]; /* location of alpha channel in image a */ + + else + alpha_removed = 4; + } + } + + else + { + /* Direct compare is not possible, cancel out all the corresponding local + * variables. + */ + bchannels = 0; + alpha_removed = alpha_added = 4; + btoa[3] = btoa[2] = btoa[1] = btoa[0] = 4; /* 4 == not present */ + } + + for (y=0; ycolormap + a_sample * *ppa++; + else + psa = ppa, ppa += a_sample; + + if (formatb & PNG_FORMAT_FLAG_COLORMAP) + psb = (png_const_bytep)b->colormap + b_sample * *ppb++; + else + psb = ppb, ppb += b_sample; + + /* Do the fast test if possible. */ + if (bchannels) + { + /* Check each 'b' channel against either the corresponding 'a' + * channel or the opaque alpha value, as appropriate. If + * alpha_removed value is set (not 4) then also do this only if the + * 'a' alpha channel (alpha_removed) is opaque; only relevant for + * the 8-bit case. + */ + if (formatb & PNG_FORMAT_FLAG_LINEAR) /* 16-bit checks */ + { + png_const_uint_16p pua = aligncastconst(png_const_uint_16p, psa); + png_const_uint_16p pub = aligncastconst(png_const_uint_16p, psb); + + switch (bchannels) + { + case 4: + if (pua[btoa[3]] != pub[3]) break; + case 3: + if (pua[btoa[2]] != pub[2]) break; + case 2: + if (pua[btoa[1]] != pub[1]) break; + case 1: + if (pua[btoa[0]] != pub[0]) break; + if (alpha_added != 4 && pub[alpha_added] != 65535) break; + continue; /* x loop */ + default: + break; /* impossible */ + } + } + + else if (alpha_removed == 4 || psa[alpha_removed] == 255) + { + switch (bchannels) + { + case 4: + if (psa[btoa[3]] != psb[3]) break; + case 3: + if (psa[btoa[2]] != psb[2]) break; + case 2: + if (psa[btoa[1]] != psb[1]) break; + case 1: + if (psa[btoa[0]] != psb[0]) break; + if (alpha_added != 4 && psb[alpha_added] != 255) break; + continue; /* x loop */ + default: + break; /* impossible */ + } + } + } + + /* If we get to here the fast match failed; do the slow match for this + * pixel. + */ + if (!cmppixel(&tr, psa, psb, x, y) && (a->opts & KEEP_GOING) == 0) + return 0; /* error case */ + } + } + + /* If reqested copy the error values back from the Transform. */ + if (a->opts & ACCUMULATE) + { + tr.error_ptr[0] = tr.error[0]; + tr.error_ptr[1] = tr.error[1]; + tr.error_ptr[2] = tr.error[2]; + tr.error_ptr[3] = tr.error[3]; + } + + return 1; +} + +/* Read the file; how the read gets done depends on which of input_file and + * input_memory have been set. + */ +static int +read_file(Image *image, png_uint_32 format, png_const_colorp background) +{ + memset(&image->image, 0, sizeof image->image); + image->image.version = PNG_IMAGE_VERSION; + + if (image->input_memory != NULL) + { + if (!png_image_begin_read_from_memory(&image->image, image->input_memory, + image->input_memory_size)) + return logerror(image, "memory init: ", image->file_name, ""); + } + + else if (image->input_file != NULL) + { + if (!png_image_begin_read_from_stdio(&image->image, image->input_file)) + return logerror(image, "stdio init: ", image->file_name, ""); + } + + else + { + if (!png_image_begin_read_from_file(&image->image, image->file_name)) + return logerror(image, "file init: ", image->file_name, ""); + } + + /* Have an initialized image with all the data we need plus, maybe, an + * allocated file (myfile) or buffer (mybuffer) that need to be freed. + */ + { + int result; + png_uint_32 image_format; + + /* Print both original and output formats. */ + image_format = image->image.format; + + if (image->opts & VERBOSE) + { + printf("%s %lu x %lu %s -> %s", image->file_name, + (unsigned long)image->image.width, + (unsigned long)image->image.height, + format_names[image_format & FORMAT_MASK], + (format & FORMAT_NO_CHANGE) != 0 || image->image.format == format + ? "no change" : format_names[format & FORMAT_MASK]); + + if (background != NULL) + printf(" background(%d,%d,%d)\n", background->red, + background->green, background->blue); + else + printf("\n"); + + fflush(stdout); + } + + /* 'NO_CHANGE' combined with the color-map flag forces the base format + * flags to be set on read to ensure that the original representation is + * not lost in the pass through a colormap format. + */ + if ((format & FORMAT_NO_CHANGE) != 0) + { + if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && + (image_format & PNG_FORMAT_FLAG_COLORMAP) != 0) + format = (image_format & ~BASE_FORMATS) | (format & BASE_FORMATS); + + else + format = image_format; + } + + image->image.format = format; + + image->stride = PNG_IMAGE_ROW_STRIDE(image->image) + image->stride_extra; + allocbuffer(image); + + result = png_image_finish_read(&image->image, background, + image->buffer+16, (png_int_32)image->stride, image->colormap); + + checkbuffer(image, image->file_name); + + if (result) + return checkopaque(image); + + else + return logerror(image, image->file_name, ": image read failed", ""); + } +} + +/* Reads from a filename, which must be in image->file_name, but uses + * image->opts to choose the method. The file is always read in its native + * format (the one the simplified API suggests). + */ +static int +read_one_file(Image *image) +{ + if (!(image->opts & READ_FILE) || (image->opts & USE_STDIO)) + { + /* memory or stdio. */ + FILE *f = fopen(image->file_name, "rb"); + + if (f != NULL) + { + if (image->opts & READ_FILE) + image->input_file = f; + + else /* memory */ + { + if (fseek(f, 0, SEEK_END) == 0) + { + long int cb = ftell(f); + + if (cb > 0 && (unsigned long int)cb < (size_t)~(size_t)0) + { + png_bytep b = voidcast(png_bytep, malloc((size_t)cb)); + + if (b != NULL) + { + rewind(f); + + if (fread(b, (size_t)cb, 1, f) == 1) + { + fclose(f); + image->input_memory_size = cb; + image->input_memory = b; + } + + else + { + free(b); + return logclose(image, f, image->file_name, + ": read failed: "); + } + } + + else + return logclose(image, f, image->file_name, + ": out of memory: "); + } + + else if (cb == 0) + return logclose(image, f, image->file_name, + ": zero length: "); + + else + return logclose(image, f, image->file_name, + ": tell failed: "); + } + + else + return logclose(image, f, image->file_name, ": seek failed: "); + } + } + + else + return logerror(image, image->file_name, ": open failed: ", + strerror(errno)); + } + + return read_file(image, FORMAT_NO_CHANGE, NULL); +} + +static int +write_one_file(Image *output, Image *image, int convert_to_8bit) +{ + if (image->opts & FAST_WRITE) + image->image.flags |= PNG_IMAGE_FLAG_FAST; + + if (image->opts & USE_STDIO) + { + FILE *f = tmpfile(); + + if (f != NULL) + { + if (png_image_write_to_stdio(&image->image, f, convert_to_8bit, + image->buffer+16, (png_int_32)image->stride, image->colormap)) + { + if (fflush(f) == 0) + { + rewind(f); + initimage(output, image->opts, "tmpfile", image->stride_extra); + output->input_file = f; + if (!checkopaque(image)) + return 0; + } + + else + return logclose(image, f, "tmpfile", ": flush: "); + } + + else + { + fclose(f); + return logerror(image, "tmpfile", ": write failed", ""); + } + } + + else + return logerror(image, "tmpfile", ": open: ", strerror(errno)); + } + + else + { + static int counter = 0; + char name[32]; + + sprintf(name, "TMP%d.png", ++counter); + + if (png_image_write_to_file(&image->image, name, convert_to_8bit, + image->buffer+16, (png_int_32)image->stride, image->colormap)) + { + initimage(output, image->opts, output->tmpfile_name, + image->stride_extra); + /* Afterwards, or freeimage will delete it! */ + strcpy(output->tmpfile_name, name); + + if (!checkopaque(image)) + return 0; + } + + else + return logerror(image, name, ": write failed", ""); + } + + /* 'output' has an initialized temporary image, read this back in and compare + * this against the original: there should be no change since the original + * format was written unmodified unless 'convert_to_8bit' was specified. + * However, if the original image was color-mapped, a simple read will zap + * the linear, color and maybe alpha flags, this will cause spurious failures + * under some circumstances. + */ + if (read_file(output, image->image.format | FORMAT_NO_CHANGE, NULL)) + { + png_uint_32 original_format = image->image.format; + + if (convert_to_8bit) + original_format &= ~PNG_FORMAT_FLAG_LINEAR; + + if ((output->image.format & BASE_FORMATS) != + (original_format & BASE_FORMATS)) + return logerror(image, image->file_name, ": format changed on read: ", + output->file_name); + + return compare_two_images(image, output, 0/*via linear*/, NULL); + } + + else + return logerror(output, output->tmpfile_name, + ": read of new file failed", ""); +} + +static int +testimage(Image *image, png_uint_32 opts, format_list *pf) +{ + int result; + Image copy; + + /* Copy the original data, stealing it from 'image' */ + checkopaque(image); + copy = *image; + + copy.opts = opts; + copy.buffer = NULL; + copy.bufsize = 0; + copy.allocsize = 0; + + image->input_file = NULL; + image->input_memory = NULL; + image->input_memory_size = 0; + image->tmpfile_name[0] = 0; + + { + png_uint_32 counter; + Image output; + + newimage(&output); + + result = 1; + + /* Use the low bit of 'counter' to indicate whether or not to do alpha + * removal with a background color or by composting onto the image; this + * step gets skipped if it isn't relevant + */ + for (counter=0; counter<2*FORMAT_COUNT; ++counter) + if (format_isset(pf, counter >> 1)) + { + png_uint_32 format = counter >> 1; + + png_color background_color; + png_colorp background = NULL; + + /* If there is a format change that removes the alpha channel then + * the background is relevant. If the output is 8-bit color-mapped + * then a background color *must* be provided, otherwise there are + * two tests to do - one with a color, the other with NULL. The + * NULL test happens second. + */ + if ((counter & 1) == 0) + { + if ((format & PNG_FORMAT_FLAG_ALPHA) == 0 && + (image->image.format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + /* Alpha/transparency will be removed, the background is + * relevant: make it a color the first time + */ + random_color(&background_color); + background = &background_color; + + /* BUT if the output is to a color-mapped 8-bit format then + * the background must always be a color, so increment 'counter' + * to skip the NULL test. + */ + if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && + (format & PNG_FORMAT_FLAG_LINEAR) == 0) + ++counter; + } + + /* Otherwise an alpha channel is not being eliminated, just leave + * background NULL and skip the (counter & 1) NULL test. + */ + else + ++counter; + } + /* else just use NULL for background */ + + resetimage(©); + copy.opts = opts; /* in case read_file needs to change it */ + + result = read_file(©, format, background); + if (!result) + break; + + /* Make sure the file just read matches the original file. */ + result = compare_two_images(image, ©, 0/*via linear*/, background); + if (!result) + break; + + /* Write the *copy* just made to a new file to make sure the write side + * works ok. Check the conversion to sRGB if the copy is linear. + */ + output.opts = opts; + result = write_one_file(&output, ©, 0/*convert to 8bit*/); + if (!result) + break; + + /* Validate against the original too; the background is needed here + * as well so that compare_two_images knows what color was used. + */ + result = compare_two_images(image, &output, 0, background); + if (!result) + break; + + if ((format & PNG_FORMAT_FLAG_LINEAR) != 0 && + (format & PNG_FORMAT_FLAG_COLORMAP) == 0) + { + /* 'output' is linear, convert to the corresponding sRGB format. */ + output.opts = opts; + result = write_one_file(&output, ©, 1/*convert to 8bit*/); + if (!result) + break; + + /* This may involve a conversion via linear; in the ideal world this + * would round-trip correctly, but libpng 1.5.7 is not the ideal + * world so allow a drift (error_via_linear). + * + * 'image' has an alpha channel but 'output' does not then there + * will a strip-alpha-channel operation (because 'output' is + * linear), handle this by composing on black when doing the + * comparison. + */ + result = compare_two_images(image, &output, 1/*via_linear*/, + background); + if (!result) + break; + } + } + + freeimage(&output); + } + + freeimage(©); + + return result; +} + +static int +test_one_file(const char *file_name, format_list *formats, png_uint_32 opts, + int stride_extra, int log_pass) +{ + int result; + Image image; + + newimage(&image); + initimage(&image, opts, file_name, stride_extra); + result = read_one_file(&image); + if (result) + result = testimage(&image, opts, formats); + freeimage(&image); + + /* Ensure that stderr is flushed into any log file */ + fflush(stderr); + + if (log_pass) + { + if (result) + printf("PASS:"); + + else + printf("FAIL:"); + + print_opts(opts); + printf(" %s\n", file_name); + /* stdout may not be line-buffered if it is piped to a file, so: */ + fflush(stdout); + } + + else if (!result) + exit(1); + + return result; +} + +int +main(int argc, char **argv) +{ + png_uint_32 opts = FAST_WRITE; + format_list formats; + const char *touch = NULL; + int log_pass = 0; + int redundant = 0; + int stride_extra = 0; + int retval = 0; + int c; + + init_sRGB_to_d(); +#if 0 + init_error_via_linear(); +#endif + format_init(&formats); + + for (c=1; c FORMAT_COUNT) + exit(1); + + format_set(&formats, format); + } + else if (arg[0] == '-' && arg[1] != 0 && (arg[1] != '0' || arg[2] != 0)) + { + fflush(stdout); + fprintf(stderr, "%s: unknown option: %s\n", argv[0], arg); + exit(1); + } + else + { + if (format_is_initial(&formats)) + format_default(&formats, redundant); + + if (arg[0] == '-') + { + const int term = (arg[1] == '0' ? 0 : '\n'); + unsigned int ich = 0; + + /* Loop reading files, use a static buffer to simplify this and just + * stop if the name gets to long. + */ + static char buffer[4096]; + + do + { + int ch = getchar(); + + /* Don't allow '\0' in file names, and terminate with '\n' or, + * for -0, just '\0' (use -print0 to find to make this work!) + */ + if (ch == EOF || ch == term || ch == 0) + { + buffer[ich] = 0; + + if (ich > 0 && !test_one_file(buffer, &formats, opts, + stride_extra, log_pass)) + retval = 1; + + if (ch == EOF) + break; + + ich = 0; + --ich; /* so that the increment below sets it to 0 again */ + } + + else + buffer[ich] = (char)ch; + } while (++ich < sizeof buffer); + + if (ich) + { + buffer[32] = 0; + buffer[4095] = 0; + fprintf(stderr, "%s...%s: file name too long\n", buffer, + buffer+(4096-32)); + exit(1); + } + } + + else if (!test_one_file(arg, &formats, opts, stride_extra, log_pass)) + retval = 1; + } + } + + if (opts & ACCUMULATE) + { + unsigned int in; + + printf("static png_uint_16 gpc_error[16/*in*/][16/*out*/][4/*a*/] =\n"); + printf("{\n"); + for (in=0; in<16; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<16; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 15) + { + putchar(','); + if (out % 4 == 3) printf("\n "); + } + } + printf("\n }"); + + if (in < 15) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + + printf("static png_uint_16 gpc_error_via_linear[16][4/*out*/][4] =\n"); + printf("{\n"); + for (in=0; in<16; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<4; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error_via_linear[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 3) + putchar(','); + } + printf("\n }"); + + if (in < 15) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + + printf("static png_uint_16 gpc_error_to_colormap[8/*i*/][8/*o*/][4] =\n"); + printf("{\n"); + for (in=0; in<8; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<8; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error_to_colormap[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 7) + { + putchar(','); + if (out % 4 == 3) printf("\n "); + } + } + printf("\n }"); + + if (in < 7) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + } + + if (retval == 0 && touch != NULL) + { + FILE *fsuccess = fopen(touch, "wt"); + + if (fsuccess != NULL) + { + int error = 0; + fprintf(fsuccess, "PNG simple API tests succeeded\n"); + fflush(fsuccess); + error = ferror(fsuccess); + + if (fclose(fsuccess) || error) + { + fflush(stdout); + fprintf(stderr, "%s: write failed\n", touch); + exit(1); + } + } + + else + { + fflush(stdout); + fprintf(stderr, "%s: open failed\n", touch); + exit(1); + } + } + + return retval; +} diff -ru4NwbB libpng-1.5.10/contrib/libtests/pngstest.c.orig libpng-1.6.0beta22/contrib/libtests/pngstest.c.orig --- libpng-1.5.10/contrib/libtests/pngstest.c.orig 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/libtests/pngstest.c.orig 2012-05-23 12:30:58.838866238 -0500 @@ -0,0 +1,3678 @@ +/*- + * pngstest.c + * + * Copyright (c) 2012 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Test for the PNG 'simplified' APIs. + */ +#define _ISOC90_SOURCE 1 +#define MALLOC_CHECK_ 2/*glibc facility: turn on debugging*/ + +#include +#include +#include +#include +#include +#include +#include + +#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +#include "../tools/sRGB.h" + +/* KNOWN ISSUES + * + * These defines switch on alternate algorithms for format convertions to match + * the current libpng implementation; they are set to allow pngstest to pass + * even though libpng is producing answers that are not as correct as they + * should be. + */ +#define ALLOW_UNUSED_GPC 0 + /* If true include unused static GPC functions and declare an external array + * of them to hide the fact that they are unused. This is for development + * use while testing the correct function to use to take into account libpng + * misbehavior, such as using a simple power law to correct sRGB to linear. + */ + +/* The following is to support direct compilation of this file as C++ */ +#ifdef __cplusplus +# define voidcast(type, value) static_cast(value) +#else +# define voidcast(type, value) (value) +#endif /* __cplusplus */ + +/* Generate random bytes. This uses a boring repeatable algorithm and it + * is implemented here so that it gives the same set of numbers on every + * architecture. It's a linear congruential generator (Knuth or Sedgewick + * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and + * Hill, "The Art of Electronics". + */ +static void +make_random_bytes(png_uint_32* seed, void* pv, size_t size) +{ + png_uint_32 u0 = seed[0], u1 = seed[1]; + png_bytep bytes = voidcast(png_bytep, pv); + + /* There are thirty three bits, the next bit in the sequence is bit-33 XOR + * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. + */ + size_t i; + for (i=0; i> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; + u1 <<= 8; + u1 |= u0 >> 24; + u0 <<= 8; + u0 |= u; + *bytes++ = (png_byte)u; + } + + seed[0] = u0; + seed[1] = u1; +} + +static void +random_color(png_colorp color) +{ + static png_uint_32 color_seed[2] = { 0x12345678, 0x9abcdef }; + make_random_bytes(color_seed, color, sizeof *color); +} + +/* Math support - neither Cygwin nor Visual Studio have C99 support and we need + * a predictable rounding function, so make one here: + */ +static double +closestinteger(double x) +{ + return floor(x + .5); +} + +/* Cast support: remove GCC whines. */ +static png_byte +u8d(double d) +{ + d = closestinteger(d); + return (png_byte)d; +} + +static png_uint_16 +u16d(double d) +{ + d = closestinteger(d); + return (png_uint_16)d; +} + +/* sRGB support: use exact calculations rounded to the nearest int, see the + * fesetround() call in main(). sRGB_to_d optimizes the 8 to 16-bit convertion. + */ +static double sRGB_to_d[256]; +static double g22_to_d[256]; + +static void +init_sRGB_to_d(void) +{ + int i; + + sRGB_to_d[0] = 0; + for (i=1; i<255; ++i) + sRGB_to_d[i] = linear_from_sRGB(i/255.); + sRGB_to_d[255] = 1; + + g22_to_d[0] = 0; + for (i=1; i<255; ++i) + g22_to_d[i] = pow(i/255., 1/.45455); + g22_to_d[255] = 1; +} + +static png_byte +sRGB(double linear /*range 0.0 .. 1.0*/) +{ + return u8d(255 * sRGB_from_linear(linear)); +} + +static png_byte +isRGB(int fixed_linear) +{ + return sRGB(fixed_linear / 65535.); +} + +#if 0 /* not used */ +static png_byte +unpremultiply(int component, int alpha) +{ + if (alpha <= component) + return 255; /* Arbitrary, but consistent with the libpng code */ + + else if (alpha >= 65535) + return isRGB(component); + + else + return sRGB((double)component / alpha); +} +#endif + +static png_uint_16 +ilinear(int fixed_srgb) +{ + return u16d(65535 * sRGB_to_d[fixed_srgb]); +} + +static png_uint_16 +ilineara(int fixed_srgb, int alpha) +{ + return u16d((257 * alpha) * sRGB_to_d[fixed_srgb]); +} + +static png_uint_16 +ilinear_g22(int fixed_srgb) +{ + return u16d(65535 * g22_to_d[fixed_srgb]); +} + +#if ALLOW_UNUSED_GPC +static png_uint_16 +ilineara_g22(int fixed_srgb, int alpha) +{ + return u16d((257 * alpha) * g22_to_d[fixed_srgb]); +} +#endif + +static double +YfromRGBint(int ir, int ig, int ib) +{ + double r = ir; + double g = ig; + double b = ib; + return YfromRGB(r, g, b); +} + +#if 0 /* unused */ +/* The error that results from using a 2.2 power law in place of the correct + * sRGB transform, given an 8-bit value which might be either sRGB or power-law. + */ +static int +power_law_error8(int value) +{ + if (value > 0 && value < 255) + { + double vd = value / 255.; + double e = fabs( + pow(sRGB_to_d[value], 1/2.2) - sRGB_from_linear(pow(vd, 2.2))); + + /* Always allow an extra 1 here for rounding errors */ + e = 1+floor(255 * e); + return (int)e; + } + + return 0; +} + +static int error_in_sRGB_roundtrip = 56; /* by experiment */ +static int +power_law_error16(int value) +{ + if (value > 0 && value < 65535) + { + /* Round trip the value through an 8-bit representation but using + * non-matching to/from convertions. + */ + double vd = value / 65535.; + double e = fabs( + pow(sRGB_from_linear(vd), 2.2) - linear_from_sRGB(pow(vd, 1/2.2))); + + /* Always allow an extra 1 here for rounding errors */ + e = error_in_sRGB_roundtrip+floor(65535 * e); + return (int)e; + } + + return 0; +} + +static int +compare_8bit(int v1, int v2, int error_limit, int multiple_algorithms) +{ + int e = abs(v1-v2); + int ev1, ev2; + + if (e <= error_limit) + return 1; + + if (!multiple_algorithms) + return 0; + + ev1 = power_law_error8(v1); + if (e <= ev1) + return 1; + + ev2 = power_law_error8(v2); + if (e <= ev2) + return 1; + + return 0; +} + +static int +compare_16bit(int v1, int v2, int error_limit, int multiple_algorithms) +{ + int e = abs(v1-v2); + int ev1, ev2; + + if (e <= error_limit) + return 1; + + /* "multiple_algorithms" in this case means that a color-map has been + * involved somewhere, so we can deduce that the values were forced to 8-bit + * (like the via_linear case for 8-bit.) + */ + if (!multiple_algorithms) + return 0; + + ev1 = power_law_error16(v1); + if (e <= ev1) + return 1; + + ev2 = power_law_error16(v2); + if (e <= ev2) + return 1; + + return 0; +} +#endif /* unused */ + +#define READ_FILE 1 /* else memory */ +#define USE_STDIO 2 /* else use file name */ +#define STRICT 4 /* fail on warnings too */ +#define VERBOSE 8 +#define KEEP_TMPFILES 16 /* else delete temporary files */ +#define KEEP_GOING 32 +#define ACCUMULATE 64 +#define FAST_WRITE 128 + +static void +print_opts(png_uint_32 opts) +{ + if (opts & READ_FILE) + printf(" --file"); + if (opts & USE_STDIO) + printf(" --stdio"); + if (opts & STRICT) + printf(" --strict"); + if (opts & VERBOSE) + printf(" --verbose"); + if (opts & KEEP_TMPFILES) + printf(" --preserve"); + if (opts & KEEP_GOING) + printf(" --keep-going"); + if (opts & ACCUMULATE) + printf(" --accumulate"); + if (!(opts & FAST_WRITE)) /* --fast is currently the default */ + printf(" --slow"); +} + +#define FORMAT_NO_CHANGE 0x80000000 /* additional flag */ + +/* A name table for all the formats - defines the format of the '+' arguments to + * pngstest. + */ +#define FORMAT_COUNT 64 +#define FORMAT_MASK 0x3f +static PNG_CONST char * PNG_CONST format_names[FORMAT_COUNT] = +{ + "sRGB-gray", + "sRGB-gray+alpha", + "sRGB-rgb", + "sRGB-rgb+alpha", + "linear-gray", + "linear-gray+alpha", + "linear-rgb", + "linear-rgb+alpha", + + "color-mapped-sRGB-gray", + "color-mapped-sRGB-gray+alpha", + "color-mapped-sRGB-rgb", + "color-mapped-sRGB-rgb+alpha", + "color-mapped-linear-gray", + "color-mapped-linear-gray+alpha", + "color-mapped-linear-rgb", + "color-mapped-linear-rgb+alpha", + + "sRGB-gray", + "sRGB-gray+alpha", + "sRGB-bgr", + "sRGB-bgr+alpha", + "linear-gray", + "linear-gray+alpha", + "linear-bgr", + "linear-bgr+alpha", + + "color-mapped-sRGB-gray", + "color-mapped-sRGB-gray+alpha", + "color-mapped-sRGB-bgr", + "color-mapped-sRGB-bgr+alpha", + "color-mapped-linear-gray", + "color-mapped-linear-gray+alpha", + "color-mapped-linear-bgr", + "color-mapped-linear-bgr+alpha", + + "sRGB-gray", + "alpha+sRGB-gray", + "sRGB-rgb", + "alpha+sRGB-rgb", + "linear-gray", + "alpha+linear-gray", + "linear-rgb", + "alpha+linear-rgb", + + "color-mapped-sRGB-gray", + "color-mapped-alpha+sRGB-gray", + "color-mapped-sRGB-rgb", + "color-mapped-alpha+sRGB-rgb", + "color-mapped-linear-gray", + "color-mapped-alpha+linear-gray", + "color-mapped-linear-rgb", + "color-mapped-alpha+linear-rgb", + + "sRGB-gray", + "alpha+sRGB-gray", + "sRGB-bgr", + "alpha+sRGB-bgr", + "linear-gray", + "alpha+linear-gray", + "linear-bgr", + "alpha+linear-bgr", + + "color-mapped-sRGB-gray", + "color-mapped-alpha+sRGB-gray", + "color-mapped-sRGB-bgr", + "color-mapped-alpha+sRGB-bgr", + "color-mapped-linear-gray", + "color-mapped-alpha+linear-gray", + "color-mapped-linear-bgr", + "color-mapped-alpha+linear-bgr", +}; + +/* Decode an argument to a format number. */ +static png_uint_32 +formatof(const char *arg) +{ + char *ep; + unsigned long format = strtoul(arg, &ep, 0); + + if (ep > arg && *ep == 0 && format < FORMAT_COUNT) + return (png_uint_32)format; + + else for (format=0; format < FORMAT_COUNT; ++format) + { + if (strcmp(format_names[format], arg) == 0) + return (png_uint_32)format; + } + + fprintf(stderr, "pngstest: format name '%s' invalid\n", arg); + return FORMAT_COUNT; +} + +/* Bitset/test functions for formats */ +#define FORMAT_SET_COUNT (FORMAT_COUNT / 32) +typedef struct +{ + png_uint_32 bits[FORMAT_SET_COUNT]; +} +format_list; + +static void format_init(format_list *pf) +{ + int i; + for (i=0; ibits[i] = 0; /* All off */ +} + +#if 0 /* currently unused */ +static void format_clear(format_list *pf) +{ + int i; + for (i=0; ibits[i] = 0; +} +#endif + +static int format_is_initial(format_list *pf) +{ + int i; + for (i=0; ibits[i] != 0) + return 0; + + return 1; +} + +static int format_set(format_list *pf, png_uint_32 format) +{ + if (format < FORMAT_COUNT) + return pf->bits[format >> 5] |= ((png_uint_32)1) << (format & 31); + + return 0; +} + +#if 0 /* currently unused */ +static int format_unset(format_list *pf, png_uint_32 format) +{ + if (format < FORMAT_COUNT) + return pf->bits[format >> 5] &= ~((png_uint_32)1) << (format & 31); + + return 0; +} +#endif + +static int format_isset(format_list *pf, png_uint_32 format) +{ + return format < FORMAT_COUNT && + (pf->bits[format >> 5] & (((png_uint_32)1) << (format & 31))) != 0; +} + +static void format_default(format_list *pf, int redundant) +{ + if (redundant) + { + int i; + + /* set everything, including flags that are pointless */ + for (i=0; ibits[i] = ~(png_uint_32)0; + } + + else + { + png_uint_32 f; + + for (f=0; finput_file != NULL) + rewind(image->input_file); +} + +/* Free the image buffer; the buffer is re-used on a re-read, this is just for + * cleanup. + */ +static void +freebuffer(Image *image) +{ + if (image->buffer) free(image->buffer); + image->buffer = NULL; + image->bufsize = 0; + image->allocsize = 0; +} + +/* Delete function; cleans out all the allocated data and the temporary file in + * the image. + */ +static void +freeimage(Image *image) +{ + freebuffer(image); + png_image_free(&image->image); + + if (image->input_file != NULL) + { + fclose(image->input_file); + image->input_file = NULL; + } + + if (image->input_memory != NULL) + { + free(image->input_memory); + image->input_memory = NULL; + image->input_memory_size = 0; + } + + if (image->tmpfile_name[0] != 0 && (image->opts & KEEP_TMPFILES) == 0) + { + remove(image->tmpfile_name); + image->tmpfile_name[0] = 0; + } +} + +/* This is actually a re-initializer; allows an image structure to be re-used by + * freeing everything that relates to an old image. + */ +static void initimage(Image *image, png_uint_32 opts, const char *file_name, + int stride_extra) +{ + freeimage(image); + memset(&image->image, 0, sizeof image->image); + image->opts = opts; + image->file_name = file_name; + image->stride_extra = stride_extra; +} + +/* Make sure the image buffer is big enough; allows re-use of the buffer if the + * image is re-read. + */ +#define BUFFER_INIT8 73 +static void +allocbuffer(Image *image) +{ + png_size_t size = PNG_IMAGE_BUFFER_SIZE(image->image, image->stride); + + if (size+32 > image->bufsize) + { + freebuffer(image); + image->buffer = voidcast(png_bytep, malloc(size+32)); + if (image->buffer == NULL) + { + fflush(stdout); + fprintf(stderr, + "simpletest: out of memory allocating %lu(+32) byte buffer\n", + (unsigned long)size); + exit(1); + } + image->bufsize = size+32; + } + + memset(image->buffer, 95, image->bufsize); + memset(image->buffer+16, BUFFER_INIT8, size); + image->allocsize = size; +} + +/* Make sure 16 bytes match the given byte. */ +static int +check16(png_const_bytep bp, int b) +{ + int i = 16; + + do + if (*bp != b) return 1; + while (--i); + + return 0; +} + +/* Check for overwrite in the image buffer. */ +static void +checkbuffer(Image *image, const char *arg) +{ + if (check16(image->buffer, 95)) + { + fflush(stdout); + fprintf(stderr, "%s: overwrite at start of image buffer\n", arg); + exit(1); + } + + if (check16(image->buffer+16+image->allocsize, 95)) + { + fflush(stdout); + fprintf(stderr, "%s: overwrite at end of image buffer\n", arg); + exit(1); + } +} + +/* ERROR HANDLING */ +/* Log a terminal error, also frees the libpng part of the image if necessary. + */ +static int +logerror(Image *image, const char *a1, const char *a2, const char *a3) +{ + fflush(stdout); + if (image->image.warning_or_error) + fprintf(stderr, "%s%s%s: %s\n", a1, a2, a3, image->image.message); + + else + fprintf(stderr, "%s%s%s\n", a1, a2, a3); + + if (image->image.opaque != NULL) + { + fprintf(stderr, "%s: image opaque pointer non-NULL on error\n", + image->file_name); + png_image_free(&image->image); + } + + return 0; +} + +/* Log an error and close a file (just a utility to do both things in one + * function call.) + */ +static int +logclose(Image *image, FILE *f, const char *name, const char *operation) +{ + int e = errno; + + fclose(f); + return logerror(image, name, operation, strerror(e)); +} + +/* Make sure the png_image has been freed - validates that libpng is doing what + * the spec says and freeing the image. + */ +static int +checkopaque(Image *image) +{ + if (image->image.opaque != NULL) + { + png_image_free(&image->image); + return logerror(image, image->file_name, ": opaque not NULL", ""); + } + + else if (image->image.warning_or_error != 0 && (image->opts & STRICT) != 0) + return logerror(image, image->file_name, " --strict", ""); + + else + return 1; +} + +/* IMAGE COMPARISON/CHECKING */ +/* Compare the pixels of two images, which should be the same but aren't. The + * images must have been checked for a size match. + */ +typedef struct +{ + /* The components, for grayscale images the gray value is in 'g' and if alpha + * is not present 'a' is set to 255 or 65535 according to format. + */ + int r, g, b, a; +} Pixel; + +typedef struct +{ + /* The background as the original sRGB 8-bit value converted to the final + * integer format and as a double precision linear value in the range 0..1 + * for with partially transparent pixels. + */ + int ir, ig, ib; + double dr, dg, db; /* linear r,g,b scaled to 0..1 */ +} Background; + +/* Basic image formats; control the data but not the layout thereof. */ +#define BASE_FORMATS\ + (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_LINEAR) + +/* Read a Pixel from a buffer. The code below stores the correct routine for + * the format in a function pointer, these are the routines: + */ +static void +gp_g8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[0]; + p->a = 255; +} + +static void +gp_ga8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[0]; + p->a = pp[1]; +} + +static void +gp_ag8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[1]; + p->a = pp[0]; +} + +static void +gp_rgb8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = 255; +} + +static void +gp_bgr8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = 255; +} + +static void +gp_rgba8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = pp[3]; +} + +static void +gp_bgra8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = pp[3]; +} + +static void +gp_argb8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[1]; + p->g = pp[2]; + p->b = pp[3]; + p->a = pp[0]; +} + +static void +gp_abgr8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[3]; + p->g = pp[2]; + p->b = pp[1]; + p->a = pp[0]; +} + +static void +gp_g16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[0]; + p->a = 65535; +} + +static void +gp_ga16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[0]; + p->a = pp[1]; +} + +static void +gp_ag16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[1]; + p->a = pp[0]; +} + +static void +gp_rgb16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = 65535; +} + +static void +gp_bgr16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = 65535; +} + +static void +gp_rgba16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = pp[3]; +} + +static void +gp_bgra16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = pp[3]; +} + +static void +gp_argb16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[1]; + p->g = pp[2]; + p->b = pp[3]; + p->a = pp[0]; +} + +static void +gp_abgr16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[3]; + p->g = pp[2]; + p->b = pp[1]; + p->a = pp[0]; +} + +/* Given a format, return the correct one of the above functions. */ +static void (* +get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb) +{ + /* The color-map flag is irrelevant here - the caller of the function + * returned must either pass the buffer or, for a color-mapped image, the + * correct entry in the color-map. + */ + if (format & PNG_FORMAT_FLAG_LINEAR) + { + if (format & PNG_FORMAT_FLAG_COLOR) + { + if (format & PNG_FORMAT_FLAG_BGR) + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_abgr16; + + else + return gp_bgra16; + } + + else + return gp_bgr16; + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_argb16; + + else + return gp_rgba16; + } + + else + return gp_rgb16; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_ag16; + + else + return gp_ga16; + } + + else + return gp_g16; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_COLOR) + { + if (format & PNG_FORMAT_FLAG_BGR) + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_abgr8; + + else + return gp_bgra8; + } + + else + return gp_bgr8; + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_argb8; + + else + return gp_rgba8; + } + + else + return gp_rgb8; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_ag8; + + else + return gp_ga8; + } + + else + return gp_g8; + } + } +} + +/* Convertion between pixel formats. The code above effectively eliminates the + * component ordering changes leaving three basic changes: + * + * 1) Remove an alpha channel by pre-multiplication or compositing on a + * background color. (Adding an alpha channel is a no-op.) + * + * 2) Remove color by mapping to grayscale. (Grayscale to color is a no-op.) + * + * 3) Convert between 8-bit and 16-bit components. (Both directtions are + * relevant.) + * + * This gives the following base format convertion matrix: + * + * OUT: ----- 8-bit ----- ----- 16-bit ----- + * IN G GA RGB RGBA G GA RGB RGBA + * 8 G . . . . lin lin lin lin + * 8 GA bckg . bckc . pre' pre pre' pre + * 8 RGB g8 g8 . . glin glin lin lin + * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre + * 16 G sRGB sRGB sRGB sRGB . . . . + * 16 GA b16g unpg b16c unpc A . A . + * 16 RGB sG sG sRGB sRGB g16 g16 . . + * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . + * + * 8-bit to 8-bit: + * bckg: composite on gray background + * bckc: composite on color background + * g8: convert sRGB components to sRGB grayscale + * g8b: convert sRGB components to grayscale and composite on gray background + * + * 8-bit to 16-bit: + * lin: make sRGB components linear, alpha := 65535 + * pre: make sRGB components linear and premultiply by alpha (scale alpha) + * pre': as 'pre' but alpha := 65535 + * glin: make sRGB components linear, convert to grayscale, alpha := 65535 + * gpre: make sRGB components grayscale and linear and premultiply by alpha + * gpr': as 'gpre' but alpha := 65535 + * + * 16-bit to 8-bit: + * sRGB: convert linear components to sRGB, alpha := 255 + * unpg: unpremultiply gray component and convert to sRGB (scale alpha) + * unpc: unpremultiply color components and convert to sRGB (scale alpha) + * b16g: composite linear onto gray background and convert the result to sRGB + * b16c: composite linear onto color background and convert the result to sRGB + * sG: convert linear RGB to sRGB grayscale + * sGp: unpremultiply RGB then convert to sRGB grayscale + * sCp: unpremultiply RGB then convert to sRGB + * gb16: composite linear onto background and convert to sRGB grayscale + * (order doesn't matter, the composite and grayscale operations permute) + * cb16: composite linear onto background and convert to sRGB + * + * 16-bit to 16-bit: + * A: set alpha to 65535 + * g16: convert linear RGB to linear grayscale (alpha := 65535) + * g16': as 'g16' but alpha is unchanged + */ +/* Simple copy: */ +static void +gpc_noop(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = in->r; + out->g = in->g; + out->b = in->b; + out->a = in->a; +} + +#if ALLOW_UNUSED_GPC +static void +gpc_nop8(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + if (in->a == 0) + out->r = out->g = out->b = 255; + + else + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + out->a = in->a; +} +#endif + +#if ALLOW_UNUSED_GPC +static void +gpc_nop6(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + if (in->a == 0) + out->r = out->g = out->b = 65535; + + else + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + out->a = in->a; +} +#endif + +/* 8-bit to 8-bit convertions */ +/* bckg: composite on gray background */ +static void +gpc_bckg(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 255) + out->r = out->g = out->b = in->g; + + else + { + double a = in->a / 255.; + + out->r = out->g = out->b = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); + } + + out->a = 255; +} + +/* bckc: composite on color background */ +static void +gpc_bckc(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else if (in->a >= 255) + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + else + { + double a = in->a / 255.; + + out->r = sRGB(sRGB_to_d[in->r] * a + back->dr * (1-a)); + out->g = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); + out->b = sRGB(sRGB_to_d[in->b] * a + back->db * (1-a)); + } + + out->a = 255; +} + +/* g8: convert sRGB components to sRGB grayscale */ +static void +gpc_g8(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = in->g; + + else + out->r = out->g = out->b = + sRGB(YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = in->a; +} + +/* g8b: convert sRGB components to grayscale and composite on gray background */ +static void +gpc_g8b(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 255) + { + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = in->g; + + else + out->r = out->g = out->b = sRGB(YfromRGB( + sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + } + + else + { + double a = in->a/255.; + + out->r = out->g = out->b = sRGB(a * YfromRGB(sRGB_to_d[in->r], + sRGB_to_d[in->g], sRGB_to_d[in->b]) + back->dg * (1-a)); + } + + out->a = 255; +} + +/* 8-bit to 16-bit convertions */ +/* lin: make sRGB components linear, alpha := 65535 */ +static void +gpc_lin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilinear(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilinear(in->b); + } + + else + { + out->g = ilinear(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilinear(in->b); + } + + out->a = 65535; +} + +/* pre: make sRGB components linear and premultiply by alpha (scale alpha) */ +static void +gpc_pre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara(in->b, in->a); + } + + else + { + out->g = ilineara(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara(in->b, in->a); + } + + out->a = in->a * 257; +} + +/* pre': as 'pre' but alpha := 65535 */ +static void +gpc_preq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara(in->b, in->a); + } + + else + { + out->g = ilineara(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara(in->b, in->a); + } + + out->a = 65535; +} + +/* glin: make sRGB components linear, convert to grayscale, alpha := 65535 */ +static void +gpc_glin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilinear(in->g); + + else + out->r = out->g = out->b = u16d(65535 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 65535; +} + +/* gpre: make sRGB components grayscale and linear and premultiply by alpha */ +static void +gpc_gpre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 257 * in->a; +} + +/* gpr': as 'gpre' but alpha := 65535 */ +static void +gpc_gprq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 65535; +} + +/* 8-bit to 16-bit convertions for gAMA 45455 encoded values */ +/* Lin: make gAMA 45455 components linear, alpha := 65535 */ +static void +gpc_Lin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilinear_g22(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilinear_g22(in->b); + } + + else + { + out->g = ilinear_g22(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilinear_g22(in->b); + } + + out->a = 65535; +} + +#if ALLOW_UNUSED_GPC +/* Pre: make gAMA 45455 components linear and premultiply by alpha (scale alpha) + */ +static void +gpc_Pre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara_g22(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara_g22(in->b, in->a); + } + + else + { + out->g = ilineara_g22(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara_g22(in->b, in->a); + } + + out->a = in->a * 257; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Pre': as 'Pre' but alpha := 65535 */ +static void +gpc_Preq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara_g22(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara_g22(in->b, in->a); + } + + else + { + out->g = ilineara_g22(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara_g22(in->b, in->a); + } + + out->a = 65535; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Glin: make gAMA 45455 components linear, convert to grayscale, alpha := 65535 + */ +static void +gpc_Glin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilinear_g22(in->g); + + else + out->r = out->g = out->b = u16d(65535 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 65535; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Gpre: make gAMA 45455 components grayscale and linear and premultiply by + * alpha. + */ +static void +gpc_Gpre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara_g22(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 257 * in->a; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Gpr': as 'Gpre' but alpha := 65535 */ +static void +gpc_Gprq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara_g22(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 65535; +} +#endif + +/* 16-bit to 8-bit convertions */ +/* sRGB: convert linear components to sRGB, alpha := 255 */ +static void +gpc_sRGB(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = isRGB(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = isRGB(in->b); + } + + else + { + out->g = isRGB(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = isRGB(in->b); + } + + out->a = 255; +} + +/* unpg: unpremultiply gray component and convert to sRGB (scale alpha) */ +static void +gpc_unpg(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = out->g = out->b = sRGB((double)in->g / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* unpc: unpremultiply color components and convert to sRGB (scale alpha) */ +static void +gpc_unpc(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = sRGB((double)in->r / in->a); + out->g = sRGB((double)in->g / in->a); + out->b = sRGB((double)in->b / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* b16g: composite linear onto gray background and convert the result to sRGB */ +static void +gpc_b16g(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else + { + double a = in->a/65535.; + double a1 = 1-a; + + a /= 65535; + out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); + } + + out->a = 255; +} + +/* b16c: composite linear onto color background and convert the result to sRGB*/ +static void +gpc_b16c(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else + { + double a = in->a/65535.; + double a1 = 1-a; + + a /= 65535; + out->r = sRGB(in->r * a + back->dr * a1); + out->g = sRGB(in->g * a + back->dg * a1); + out->b = sRGB(in->b * a + back->db * a1); + } + + out->a = 255; +} + +/* sG: convert linear RGB to sRGB grayscale */ +static void +gpc_sG(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/65535); + out->a = 255; +} + +/* sGp: unpremultiply RGB then convert to sRGB grayscale */ +static void +gpc_sGp(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/in->a); + out->a = u8d(in->a / 257.); + } +} + +/* sCp: unpremultiply RGB then convert to sRGB */ +static void +gpc_sCp(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = sRGB((double)in->r / in->a); + out->g = sRGB((double)in->g / in->a); + out->b = sRGB((double)in->b / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* gb16: composite linear onto background and convert to sRGB grayscale */ +/* (order doesn't matter, the composite and grayscale operations permute) */ +static void +gpc_gb16(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 65535) + out->r = out->g = out->b = isRGB(in->g); + + else + { + double a = in->a / 65535.; + double a1 = 1-a; + + a /= 65535; + out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); + } + + out->a = 255; +} + +/* cb16: composite linear onto background and convert to sRGB */ +static void +gpc_cb16(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else if (in->a >= 65535) + { + out->r = isRGB(in->r); + out->g = isRGB(in->g); + out->b = isRGB(in->b); + } + + else + { + double a = in->a / 65535.; + double a1 = 1-a; + + a /= 65535; + out->r = sRGB(in->r * a + back->dr * a1); + out->g = sRGB(in->g * a + back->dg * a1); + out->b = sRGB(in->b * a + back->db * a1); + } + + out->a = 255; +} + +/* 16-bit to 16-bit convertions */ +/* A: set alpha to 65535 */ +static void +gpc_A(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = in->r; + out->g = in->g; + out->b = in->b; + out->a = 65535; +} + +/* g16: convert linear RGB to linear grayscale (alpha := 65535) */ +static void +gpc_g16(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); + out->a = 65535; +} + +/* g16': as 'g16' but alpha is unchanged */ +static void +gpc_g16q(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); + out->a = in->a; +} + +#if ALLOW_UNUSED_GPC +/* Unused functions (to hide them from GCC unused function warnings) */ +void (* const gpc_unused[]) + (Pixel *out, const Pixel *in, const Background *back) = +{ + gpc_Pre, gpc_Preq, gpc_Glin, gpc_Gpre, gpc_Gprq, gpc_nop8, gpc_nop6 +}; +#endif + +/* OUT: ----- 8-bit ----- ----- 16-bit ----- + * IN G GA RGB RGBA G GA RGB RGBA + * 8 G . . . . lin lin lin lin + * 8 GA bckg . bckc . pre' pre pre' pre + * 8 RGB g8 g8 . . glin glin lin lin + * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre + * 16 G sRGB sRGB sRGB sRGB . . . . + * 16 GA b16g unpg b16c unpc A . A . + * 16 RGB sG sG sRGB sRGB g16 g16 . . + * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . + * + * The matrix is held in an array indexed thus: + * + * gpc_fn[out_format & BASE_FORMATS][in_format & BASE_FORMATS]; + */ +/* This will produce a compile time error if the FORMAT_FLAG values don't + * match the above matrix! + */ +#if PNG_FORMAT_FLAG_ALPHA == 1 && PNG_FORMAT_FLAG_COLOR == 2 &&\ + PNG_FORMAT_FLAG_LINEAR == 4 +static void (* const gpc_fn[8/*in*/][8/*out*/]) + (Pixel *out, const Pixel *in, const Background *back) = +{ +/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ + {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_Lin, gpc_Lin, gpc_Lin, gpc_Lin }, + {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, + {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, + {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, + {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, + {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, + {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, + {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} +}; + +/* The array is repeated for the cases where both the input and output are color + * mapped because then different algorithms are used. + */ +static void (* const gpc_fn_colormapped[8/*in*/][8/*out*/]) + (Pixel *out, const Pixel *in, const Background *back) = +{ +/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ + {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_lin, gpc_lin, gpc_lin, gpc_lin }, + {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, + {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, + {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, + {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, + {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, + {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, + {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} +}; + +/* The error arrays record the error in the same matrix; 64 entries, however + * the different algorithms used in libpng for colormap and direct convertions + * mean that four separate matrices are used (for each combination of + * colormapped and direct.) + * + * In some cases the convertion between sRGB formats goes via a linear + * intermediate; an sRGB to linear convertion (as above) is followed by a simple + * linear to sRGB step with no other convertions. This is done by a separate + * error array from an arbitrary 'in' format to one of the four basic outputs + * (since final output is always sRGB not colormapped). + * + * These arrays may be modified if the --accumulate flag is set during the run; + * then instead of logging errors they are simply added in. + * + * The three entries are currently for transparent, partially transparent and + * opaque input pixel values. Notice that alpha should be exact in each case. + * + * Errors in alpha should only occur when converting from a direct format + * to a colormapped format, when alpha is effectively smashed (so large + * errors can occur.) There should be no error in the '0' and 'opaque' + * values. The fourth entry in the array is used for the alpha error (and it + * should always be zero for the 'via linear' case since this is never color + * mapped.) + * + * Mapping to a colormap smashes the colors, it is necessary to have separate + * values for these cases because they are much larger; it is very much + * impossible to obtain a reasonable result, these are held in + * gpc_error_to_colormap. + */ +#if PNG_FORMAT_FLAG_COLORMAP == 8 /* extra check also required */ +/* START MACHINE GENERATED */ +static png_uint_16 gpc_error[16/*in*/][16/*out*/][4/*a*/] = +{ + { /* input: sRGB-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: sRGB-gray+alpha */ + { 0, 18, 0, 0 }, { 0, 0, 0, 0 }, { 0, 20, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: sRGB-rgb */ + { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 893, 0 }, { 0, 0, 893, 0 }, { 0, 0, 811, 0 }, { 0, 0, 811, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: sRGB-rgb+alpha */ + { 0, 4, 13, 0 }, { 0, 14, 13, 0 }, { 0, 19, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 832, 764, 0 }, { 0, 832, 764, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: linear-gray */ + { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: linear-gray+alpha */ + { 0, 74, 9, 0 }, { 0, 20, 9, 0 }, { 0, 74, 9, 0 }, { 0, 20, 9, 0 }, + { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: linear-rgb */ + { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, + { 0, 0, 4, 0 }, { 0, 0, 4, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: linear-rgb+alpha */ + { 0, 126, 143, 0 }, { 0, 9, 7, 0 }, { 0, 74, 9, 0 }, { 0, 16, 9, 0 }, + { 0, 4, 4, 0 }, { 0, 5, 4, 0 }, { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-gray+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-rgb */ + { 0, 0, 13, 0 }, { 0, 0, 13, 0 }, { 0, 0, 8, 0 }, { 0, 0, 8, 0 }, + { 0, 0, 673, 0 }, { 0, 0, 673, 0 }, { 0, 0, 674, 0 }, { 0, 0, 674, 0 }, + { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 460, 0 }, { 0, 0, 460, 0 }, { 0, 0, 263, 0 }, { 0, 0, 263, 0 } + }, { /* input: color-mapped-sRGB-rgb+alpha */ + { 0, 6, 8, 0 }, { 0, 7, 8, 0 }, { 0, 75, 8, 0 }, { 0, 9, 8, 0 }, + { 0, 585, 427, 0 }, { 0, 585, 427, 0 }, { 0, 717, 409, 0 }, { 0, 717, 409, 0 }, + { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 13323, 460, 0 }, { 0, 334, 460, 0 }, { 0, 16480, 263, 0 }, { 0, 243, 263, 0 } + }, { /* input: color-mapped-linear-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 282, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-gray+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 253, 282, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-rgb */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 265, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-rgb+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 243, 265, 0 } + } +}; +static png_uint_16 gpc_error_via_linear[16][4/*out*/][4] = +{ + { /* input: sRGB-gray */ + { 0, 0, 7, 0 }, { 0, 0, 7, 0 }, { 0, 0, 7, 0 }, { 0, 0, 7, 0 } + }, { /* input: sRGB-gray+alpha */ + { 0, 15, 15, 0 }, { 0, 186, 15, 0 }, { 0, 15, 15, 0 }, { 0, 186, 15, 0 } + }, { /* input: sRGB-rgb */ + { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 15, 0 }, { 0, 0, 15, 0 } + }, { /* input: sRGB-rgb+alpha */ + { 0, 12, 14, 0 }, { 0, 180, 14, 0 }, { 0, 14, 15, 0 }, { 0, 186, 15, 0 } + }, { /* input: linear-gray */ + { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 } + }, { /* input: linear-gray+alpha */ + { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 } + }, { /* input: linear-rgb */ + { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 } + }, { /* input: linear-rgb+alpha */ + { 0, 1, 1, 0 }, { 0, 8, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 } + }, { /* input: color-mapped-sRGB-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-gray+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-sRGB-rgb */ + { 0, 0, 13, 0 }, { 0, 0, 13, 0 }, { 0, 0, 14, 0 }, { 0, 0, 14, 0 } + }, { /* input: color-mapped-sRGB-rgb+alpha */ + { 0, 4, 8, 0 }, { 0, 9, 8, 0 }, { 0, 8, 3, 0 }, { 0, 32, 3, 0 } + }, { /* input: color-mapped-linear-gray */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-gray+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-rgb */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + }, { /* input: color-mapped-linear-rgb+alpha */ + { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } + } +}; +static png_uint_16 gpc_error_to_colormap[8/*i*/][8/*o*/][4] = +{ + { /* input: sRGB-gray */ + { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, + { 0, 0, 560, 0 }, { 0, 0, 560, 0 }, { 0, 0, 560, 0 }, { 0, 0, 560, 0 } + }, { /* input: sRGB-gray+alpha */ + { 0, 19, 2, 0 }, { 0, 255, 2, 25 }, { 0, 88, 2, 0 }, { 0, 255, 2, 25 }, + { 0, 1012, 745, 0 }, { 0, 16026, 745, 6425 }, { 0, 1012, 745, 0 }, { 0, 16026, 745, 6425 } + }, { /* input: sRGB-rgb */ + { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 25, 0 }, { 0, 0, 25, 0 }, + { 0, 0, 937, 0 }, { 0, 0, 937, 0 }, { 0, 0, 13677, 0 }, { 0, 0, 13677, 0 } + }, { /* input: sRGB-rgb+alpha */ + { 0, 63, 77, 0 }, { 0, 255, 19, 25 }, { 0, 220, 25, 0 }, { 0, 255, 25, 67 }, + { 0, 17534, 18491, 0 }, { 0, 15614, 2824, 6425 }, { 0, 14019, 13677, 0 }, { 0, 48573, 13677, 17219 } + }, { /* input: linear-gray */ + { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, + { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 } + }, { /* input: linear-gray+alpha */ + { 0, 74, 74, 0 }, { 0, 255, 74, 25 }, { 0, 97, 74, 0 }, { 0, 255, 74, 25 }, + { 0, 18919, 18907, 0 }, { 0, 24549, 18907, 6552 }, { 0, 18919, 18907, 0 }, { 0, 24549, 18907, 6552 } + }, { /* input: linear-rgb */ + { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 98, 0 }, { 0, 0, 98, 0 }, + { 0, 0, 18664, 0 }, { 0, 0, 18664, 0 }, { 0, 0, 24998, 0 }, { 0, 0, 24998, 0 } + }, { /* input: linear-rgb+alpha */ + { 0, 181, 196, 0 }, { 0, 255, 61, 25 }, { 206, 187, 98, 0 }, { 0, 255, 98, 67 }, + { 0, 18141, 18137, 0 }, { 0, 17494, 17504, 6553 }, { 0, 24979, 24992, 0 }, { 0, 46509, 24992, 17347 } + } +}; +/* END MACHINE GENERATED */ +#endif /* COLORMAP flag check */ +#endif /* flag checks */ + +typedef struct +{ + /* Basic pixel information: */ + Image* in_image; /* Input image */ + const Image* out_image; /* Output image */ + + /* 'background' is the value passed to the gpc_ routines, it may be NULL if + * it should not be used (*this* program has an error if it crashes as a + * result!) + */ + Background background_color; + const Background* background; + + /* Precalculated values: */ + int in_opaque; /* Value of input alpha that is opaque */ + int is_palette; /* Sample values come from the palette */ + int accumulate; /* Accumlate component errors (don't log) */ + int output_8bit; /* Output is 8 bit (else 16 bit) */ + + void (*in_gp)(Pixel*, png_const_voidp); + void (*out_gp)(Pixel*, png_const_voidp); + + void (*transform)(Pixel *out, const Pixel *in, const Background *back); + /* A function to perform the required transform */ + + void (*from_linear)(Pixel *out, const Pixel *in, const Background *back); + /* For 'via_linear' transforms the final, from linear, step, else NULL */ + + png_uint_16 error[4]; + /* Three error values for transparent, partially transparent and opaque + * input pixels (in turn). + */ + + png_uint_16 *error_ptr; + /* Where these are stored in the static array (for 'accumulate') */ +} +Transform; + +/* Return a 'transform' as above for the given format convertion. */ +static void +transform_from_formats(Transform *result, Image *in_image, + const Image *out_image, png_const_colorp background, int via_linear) +{ + png_uint_32 in_format, out_format; + png_uint_32 in_base, out_base; + + memset(result, 0, sizeof *result); + + /* Store the original images for error messages */ + result->in_image = in_image; + result->out_image = out_image; + + in_format = in_image->image.format; + out_format = out_image->image.format; + + if (in_format & PNG_FORMAT_FLAG_LINEAR) + result->in_opaque = 65535; + else + result->in_opaque = 255; + + result->output_8bit = (out_format & PNG_FORMAT_FLAG_LINEAR) == 0; + + result->is_palette = 0; /* set by caller if required */ + result->accumulate = (in_image->opts & ACCUMULATE) != 0; + + /* The loaders (which need the ordering information) */ + result->in_gp = get_pixel(in_format); + result->out_gp = get_pixel(out_format); + + /* Remove the ordering information: */ + in_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; + in_base = in_format & BASE_FORMATS; + out_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; + out_base = out_format & BASE_FORMATS; + + if (via_linear) + { + /* Check for an error in this program: */ + if (out_format & (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLORMAP)) + { + fprintf(stderr, "internal transform via linear error 0x%x->0x%x\n", + in_format, out_format); + exit(1); + } + + result->transform = gpc_fn[in_base][out_base | PNG_FORMAT_FLAG_LINEAR]; + result->from_linear = gpc_fn[out_base | PNG_FORMAT_FLAG_LINEAR][out_base]; + result->error_ptr = gpc_error_via_linear[in_format][out_format]; + } + + else if (~in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) + { + /* The input is not colormapped but the output is, the errors will + * typically be large (only the grayscale-no-alpha case permits preserving + * even 8-bit values.) + */ + result->transform = gpc_fn[in_base][out_base]; + result->from_linear = NULL; + result->error_ptr = gpc_error_to_colormap[in_base][out_base]; + } + + else + { + /* The caller handles the colormap->pixel value convertion, so the + * transform function just gets a pixel value, however because libpng + * currently contains a different implementation for mapping a colormap if + * both input and output are colormapped we need different convertion + * functions to deal with errors in the libpng implementation. + */ + if (in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) + result->transform = gpc_fn_colormapped[in_base][out_base]; + else + result->transform = gpc_fn[in_base][out_base]; + result->from_linear = NULL; + result->error_ptr = gpc_error[in_format][out_format]; + } + + /* Follow the libpng simplified API rules to work out what to pass to the gpc + * routines as a background value, if one is not required pass NULL so that + * this program crashes in the even of a programming error. + */ + result->background = NULL; /* default: not required */ + + /* Rule 1: background only need be supplied if alpha is to be removed */ + if (in_format & ~out_format & PNG_FORMAT_FLAG_ALPHA) + { + /* The input value is 'NULL' to use the background and (otherwise) an sRGB + * background color (to use a solid color). The code above uses a fixed + * byte value, BUFFER_INIT8, for buffer even for 16-bit output. For + * linear (16-bit) output the sRGB background color is ignored; the + * composition is always on the background (so BUFFER_INIT8 * 257), except + * that for the colormap (i.e. linear colormapped output) black is used. + */ + result->background = &result->background_color; + + if (out_format & PNG_FORMAT_FLAG_LINEAR || via_linear) + { + if (out_format & PNG_FORMAT_FLAG_COLORMAP) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = 0; + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 0; + } + + else + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = BUFFER_INIT8 * 257; + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 0; + } + } + + else /* sRGB output */ + { + if (background != NULL) + { + if (out_format & PNG_FORMAT_FLAG_COLOR) + { + result->background_color.ir = background->red; + result->background_color.ig = background->green; + result->background_color.ib = background->blue; + /* TODO: sometimes libpng uses the power law convertion here, how + * to handle this? + */ + result->background_color.dr = sRGB_to_d[background->red]; + result->background_color.dg = sRGB_to_d[background->green]; + result->background_color.db = sRGB_to_d[background->blue]; + } + + else /* grayscale: libpng only looks at 'g' */ + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = background->green; + /* TODO: sometimes libpng uses the power law convertion here, how + * to handle this? + */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = sRGB_to_d[background->green]; + } + } + + else if ((out_format & PNG_FORMAT_FLAG_COLORMAP) == 0) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = BUFFER_INIT8; + /* TODO: sometimes libpng uses the power law convertion here, how + * to handle this? + */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = sRGB_to_d[BUFFER_INIT8]; + } + + /* Else the output is colormapped and a background color must be + * provided; if pngstest crashes then that is a bug in this program + * (though libpng should png_error as well.) + */ + else + result->background = NULL; + } + } + + if (result->background == NULL) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = -1; /* not used */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 1E30; /* not used */ + } + + + /* Copy the error values into the Transform: */ + result->error[0] = result->error_ptr[0]; + result->error[1] = result->error_ptr[1]; + result->error[2] = result->error_ptr[2]; + result->error[3] = result->error_ptr[3]; +} + + +/* Compare two pixels. + * + * OLD error values: +static int error_to_linear = 811; * by experiment * +static int error_to_linear_grayscale = 424; * by experiment * +static int error_to_sRGB = 6; * by experiment * +static int error_to_sRGB_grayscale = 17; * libpng error by calculation + + 2 by experiment * +static int error_in_compose = 2; * by experiment * +static int error_in_premultiply = 1; + * + * The following is *just* the result of a round trip from 8-bit sRGB to linear + * then back to 8-bit sRGB when it is done by libpng. There are two problems: + * + * 1) libpng currently uses a 2.2 power law with no linear segment, this results + * in instability in the low values and even with 16-bit precision sRGB(1) ends + * up mapping to sRGB(0) as a result of rounding in the 16-bit representation. + * This gives an error of 1 in the handling of value 1 only. + * + * 2) libpng currently uses an intermediate 8-bit linear value in gamma + * correction of 8-bit values. This results in many more errors, the worse of + * which is mapping sRGB(14) to sRGB(0). + * + * The general 'error_via_linear' is more complex because of pre-multiplication, + * this compounds the 8-bit errors according to the alpha value of the pixel. + * As a result 256 values are pre-calculated for error_via_linear. + */ +#if 0 +static int error_in_libpng_gamma; +static int error_via_linear[256]; /* Indexed by 8-bit alpha */ + +static void +init_error_via_linear(void) +{ + int alpha; + + error_via_linear[0] = 255; /* transparent pixel */ + + for (alpha=1; alpha<=255; ++alpha) + { + /* 16-bit values less than 128.5 get rounded to 8-bit 0 and so the worst + * case error arises with 16-bit 128.5, work out what sRGB + * (non-associated) value generates 128.5; any value less than this is + * going to map to 0, so the worst error is floor(value). + * + * Note that errors are considerably higher (more than a factor of 2) + * because libpng uses a simple power law for sRGB data at present. + * + * Add .1 for arithmetic errors inside libpng. + */ + double v = floor(255*pow(.5/*(128.5 * 255 / 65535)*/ / alpha, 1/2.2)+.1); + + error_via_linear[alpha] = (int)v; + } + + /* This is actually 14.99, but, despite the closeness to 15, 14 seems to work + * ok in this case. + */ + error_in_libpng_gamma = 14; +} +#endif + +static void +print_pixel(char string[64], const Pixel *pixel, png_uint_32 format) +{ + switch (format & (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR)) + { + case 0: + sprintf(string, "%s(%d)", format_names[format], pixel->g); + break; + + case PNG_FORMAT_FLAG_ALPHA: + sprintf(string, "%s(%d,%d)", format_names[format], pixel->g, + pixel->a); + break; + + case PNG_FORMAT_FLAG_COLOR: + sprintf(string, "%s(%d,%d,%d)", format_names[format], + pixel->r, pixel->g, pixel->b); + break; + + case PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA: + sprintf(string, "%s(%d,%d,%d,%d)", format_names[format], + pixel->r, pixel->g, pixel->b, pixel->a); + break; + + default: + sprintf(string, "invalid-format"); + break; + } +} + +static int +logpixel(const Transform *transform, png_uint_32 x, png_uint_32 y, + const Pixel *in, const Pixel *calc, const Pixel *out, const char *reason) +{ + const png_uint_32 in_format = transform->in_image->image.format; + const png_uint_32 out_format = transform->out_image->image.format; + + png_uint_32 back_format = out_format & ~PNG_FORMAT_FLAG_ALPHA; + const char *via_linear = ""; + + char pixel_in[64], pixel_calc[64], pixel_out[64], pixel_loc[64]; + char background_info[100]; + + print_pixel(pixel_in, in, in_format); + print_pixel(pixel_calc, calc, out_format); + print_pixel(pixel_out, out, out_format); + + if (transform->is_palette) + sprintf(pixel_loc, "palette: %lu", (unsigned long)y); + else + sprintf(pixel_loc, "%lu,%lu", (unsigned long)x, (unsigned long)y); + + if (transform->from_linear != NULL) + { + via_linear = " (via linear)"; + /* And as a result the *read* format which did any background processing + * was itself linear, so the background color information is also + * linear. + */ + back_format |= PNG_FORMAT_FLAG_LINEAR; + } + + if (transform->background != NULL) + { + Pixel back; + char pixel_back[64]; + + back.r = transform->background->ir; + back.g = transform->background->ig; + back.b = transform->background->ib; + back.a = -1; /* not used */ + + print_pixel(pixel_back, &back, back_format); + sprintf(background_info, " on background %s", pixel_back); + } + + else + background_info[0] = 0; + + if (transform->in_image->file_name != transform->out_image->file_name) + { + char error_buffer[512]; + sprintf(error_buffer, + "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" + "Use --preserve and examine: ", pixel_loc, reason, via_linear, + pixel_in, background_info, pixel_out, pixel_calc); + return logerror(transform->in_image, transform->in_image->file_name, + error_buffer, transform->out_image->file_name); + } + + else + { + char error_buffer[512]; + sprintf(error_buffer, + "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" + " The error happened when reading the original file with this format.", + pixel_loc, reason, via_linear, pixel_in, background_info, pixel_out, + pixel_calc); + return logerror(transform->in_image, transform->in_image->file_name, + error_buffer, ""); + } +} + +static int +cmppixel(Transform *transform, png_const_voidp in, png_const_voidp out, + png_uint_32 x, png_uint_32 y/*or palette index*/) +{ + int maxerr; + png_const_charp errmsg; + Pixel pixel_in, pixel_calc, pixel_out; + + transform->in_gp(&pixel_in, in); + + if (transform->from_linear == NULL) + transform->transform(&pixel_calc, &pixel_in, transform->background); + + else + { + transform->transform(&pixel_out, &pixel_in, transform->background); + transform->from_linear(&pixel_calc, &pixel_out, NULL); + } + + transform->out_gp(&pixel_out, out); + + /* Eliminate the case where the input and output values match exactly. */ + if (pixel_calc.a == pixel_out.a && pixel_calc.r == pixel_out.r && + pixel_calc.g == pixel_out.g && pixel_calc.b == pixel_out.b) + return 1; + + /* Eliminate the case where the output pixel is transparent and the output + * is 8-bit - any component values are valid. Don't check the input alpha + * here to also skip the 16-bit small alpha cases. + */ + if (transform->output_8bit && pixel_calc.a == 0 && pixel_out.a == 0) + return 1; + + /* Check for alpha errors first; an alpha error can damage the components too + * so avoid spurious checks on components if one is found. + */ + errmsg = NULL; + { + int err_a = abs(pixel_calc.a-pixel_out.a); + + if (err_a > transform->error[3]) + { + /* If accumulating check the components too */ + if (transform->accumulate) + transform->error[3] = (png_uint_16)err_a; + + else + errmsg = "alpha"; + } + } + + /* Now if *either* of the output alphas are 0 but alpha is within tolerance + * eliminate the 8-bit component comparison. + */ + if (errmsg == NULL && transform->output_8bit && + (pixel_calc.a == 0 || pixel_out.a == 0)) + return 1; + + if (errmsg == NULL) /* else just signal an alpha error */ + { + int err_r = abs(pixel_calc.r - pixel_out.r); + int err_g = abs(pixel_calc.g - pixel_out.g); + int err_b = abs(pixel_calc.b - pixel_out.b); + int limit; + + if ((err_r | err_g | err_b) == 0) + return 1; /* exact match */ + + /* Mismatch on a component, check the input alpha */ + if (pixel_in.a >= transform->in_opaque) + { + errmsg = "opaque component"; + limit = 2; /* opaque */ + } + + else if (pixel_in.a > 0) + { + errmsg = "alpha component"; + limit = 1; /* partially transparent */ + } + + else + { + errmsg = "transparent component (background)"; + limit = 0; /* transparent */ + } + + maxerr = err_r; + if (maxerr < err_g) maxerr = err_g; + if (maxerr < err_b) maxerr = err_b; + + if (maxerr <= transform->error[limit]) + return 1; /* within the error limits */ + + /* Handle a component mis-match; log it, just return an error code, or + * accumulate it. + */ + if (transform->accumulate) + { + transform->error[limit] = (png_uint_16)maxerr; + return 1; /* to cause the caller to keep going */ + } + } + + /* Failure to match and not accumulating, so the error must be logged. */ + return logpixel(transform, x, y, &pixel_in, &pixel_calc, &pixel_out, errmsg); +} + +static png_byte +component_loc(png_byte loc[4], png_uint_32 format) +{ + /* Given a format return the number of channels and the location of + * each channel. + * + * The mask 'loc' contains the component offset of the channels in the + * following order. Note that if 'format' is grayscale the entries 1-3 must + * all contain the location of the gray channel. + * + * 0: alpha + * 1: red or gray + * 2: green or gray + * 3: blue or gray + */ + png_byte channels; + + if (format & PNG_FORMAT_FLAG_COLOR) + { + channels = 3; + + loc[2] = 1; + + if (format & PNG_FORMAT_FLAG_BGR) + { + loc[1] = 2; + loc[3] = 0; + } + + else + { + loc[1] = 0; + loc[3] = 2; + } + } + + else + { + channels = 1; + loc[0] = loc[1] = loc[2] = 0; + } + + if (format & PNG_FORMAT_FLAG_ALPHA) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + { + loc[0] = 0; + ++loc[1]; + ++loc[2]; + ++loc[3]; + } + + else + loc[0] = channels; + + ++channels; + } + + else + loc[0] = 4; /* not present */ + + return channels; +} + +/* Compare two images, the original 'a', which was written out then read back in + * to * give image 'b'. The formats may have been changed. + */ +static int +compare_two_images(Image *a, Image *b, int via_linear, + png_const_colorp background) +{ + ptrdiff_t stridea = a->stride; + ptrdiff_t strideb = b->stride; + png_const_bytep rowa = a->buffer+16; + png_const_bytep rowb = b->buffer+16; + const png_uint_32 width = a->image.width; + const png_uint_32 height = a->image.height; + const png_uint_32 formata = a->image.format; + const png_uint_32 formatb = b->image.format; + const unsigned int a_sample = PNG_IMAGE_SAMPLE_SIZE(formata); + const unsigned int b_sample = PNG_IMAGE_SAMPLE_SIZE(formatb); + int alpha_added, alpha_removed; + int bchannels; + int btoa[4]; + png_uint_32 y; + Transform tr; + + /* This should never happen: */ + if (width != b->image.width || height != b->image.height) + return logerror(a, a->file_name, ": width x height changed: ", + b->file_name); + + /* Set up the background and the transform */ + transform_from_formats(&tr, a, b, background, via_linear); + + /* Find the first row and inter-row space. */ + if (!(formata & PNG_FORMAT_FLAG_COLORMAP) && + (formata & PNG_FORMAT_FLAG_LINEAR)) + stridea *= 2; + + if (!(formatb & PNG_FORMAT_FLAG_COLORMAP) && + (formatb & PNG_FORMAT_FLAG_LINEAR)) + strideb *= 2; + + if (stridea < 0) rowa += (height-1) * (-stridea); + if (strideb < 0) rowb += (height-1) * (-strideb); + + /* First shortcut the two colormap case by comparing the image data; if it + * matches then we expect the colormaps to match, although this is not + * absolutely necessary for an image match. If the colormaps fail to match + * then there is a problem in libpng. + */ + if (formata & formatb & PNG_FORMAT_FLAG_COLORMAP) + { + /* Only check colormap entries that actually exist; */ + png_const_bytep ppa, ppb; + int match; + png_byte in_use[256], amax = 0, bmax = 0; + + memset(in_use, 0, sizeof in_use); + + ppa = rowa; + ppb = rowb; + + /* Do this the slow way to accumulate the 'in_use' flags, don't break out + * of the loop until the end; this validates the color-mapped data to + * ensure all pixels are valid color-map indexes. + */ + for (y=0, match=1; y bmax) + bmax = bval; + + if (bval != aval) + match = 0; + + in_use[aval] = 1; + if (aval > amax) + amax = aval; + } + } + + /* If the buffers match then the colormaps must too. */ + if (match) + { + /* Do the color-maps match, entry by entry? Only check the 'in_use' + * entries. An error here should be logged as a color-map error. + */ + png_const_bytep a_cmap = (png_const_bytep)a->colormap; + png_const_bytep b_cmap = (png_const_bytep)b->colormap; + int result = 1; /* match by default */ + + /* This is used in logpixel to get the error message correct. */ + tr.is_palette = 1; + + for (y=0; y<256; ++y, a_cmap += a_sample, b_cmap += b_sample) + if (in_use[y]) + { + /* The colormap entries should be valid, but because libpng doesn't + * do any checking at present the original image may contain invalid + * pixel values. These cause an error here (at present) unless + * accumulating errors in which case the program just ignores them. + */ + if (y >= a->image.colormap_entries) + { + if ((a->opts & ACCUMULATE) == 0) + { + char pindex[9]; + sprintf(pindex, "%lu[%lu]", (unsigned long)y, + (unsigned long)a->image.colormap_entries); + logerror(a, a->file_name, ": bad pixel index: ", pindex); + } + result = 0; + } + + else if (y >= b->image.colormap_entries) + { + if ((a->opts & ACCUMULATE) == 0) + { + char pindex[9]; + sprintf(pindex, "%lu[%lu]", (unsigned long)y, + (unsigned long)b->image.colormap_entries); + logerror(b, b->file_name, ": bad pixel index: ", pindex); + } + result = 0; + } + + /* All the mismatches are logged here; there can only be 256! */ + else if (!cmppixel(&tr, a_cmap, b_cmap, 0, y)) + result = 0; + } + + /* If reqested copy the error values back from the Transform. */ + if (a->opts & ACCUMULATE) + { + tr.error_ptr[0] = tr.error[0]; + tr.error_ptr[1] = tr.error[1]; + tr.error_ptr[2] = tr.error[2]; + tr.error_ptr[3] = tr.error[3]; + result = 1; /* force a continue */ + } + + return result; + } + + /* else the image buffers don't match pixel-wise so compare sample values + * instead, but first validate that the pixel indexes are in range (but + * only if not accumulating, when the error is ignored.) + */ + else if ((a->opts & ACCUMULATE) == 0) + { + /* Check the original image first, + * TODO: deal with input images with bad pixel values? + */ + if (amax >= a->image.colormap_entries) + { + char pindex[9]; + sprintf(pindex, "%d[%lu]", amax, + (unsigned long)a->image.colormap_entries); + return logerror(a, a->file_name, ": bad pixel index: ", pindex); + } + + else if (bmax >= b->image.colormap_entries) + { + char pindex[9]; + sprintf(pindex, "%d[%lu]", bmax, + (unsigned long)b->image.colormap_entries); + return logerror(b, b->file_name, ": bad pixel index: ", pindex); + } + } + } + + /* We can directly compare pixel values without the need to use the read + * or transform support (i.e. a memory compare) if: + * + * 1) The bit depth has not changed. + * 2) RGB to grayscale has not been done (the reverse is ok; we just compare + * the three RGB values to the original grayscale.) + * 3) An alpha channel has not been removed from an 8-bit format, or the + * 8-bit alpha value of the pixel was 255 (opaque). + * + * If an alpha channel has been *added* then it must have the relevant opaque + * value (255 or 65535). + * + * The fist two the tests (in the order given above) (using the boolean + * equivalence !a && !b == !(a || b)) + */ + if (!(((formata ^ formatb) & PNG_FORMAT_FLAG_LINEAR) | + (formata & (formatb ^ PNG_FORMAT_FLAG_COLOR) & PNG_FORMAT_FLAG_COLOR))) + { + /* Was an alpha channel changed? */ + const png_uint_32 alpha_changed = (formata ^ formatb) & + PNG_FORMAT_FLAG_ALPHA; + + /* Was an alpha channel removed? (The third test.) If so the direct + * comparison is only possible if the input alpha is opaque. + */ + alpha_removed = (formata & alpha_changed) != 0; + + /* Was an alpha channel added? */ + alpha_added = (formatb & alpha_changed) != 0; + + /* The channels may have been moved between input and output, this finds + * out how, recording the result in the btoa array, which says where in + * 'a' to find each channel of 'b'. If alpha was added then btoa[alpha] + * ends up as 4 (and is not used.) + */ + { + int i; + png_byte aloc[4]; + png_byte bloc[4]; + + /* The following are used only if the formats match, except that + * 'bchannels' is a flag for matching formats. btoa[x] says, for each + * channel in b, where to find the corresponding value in a, for the + * bchannels. achannels may be different for a gray to rgb transform + * (a will be 1 or 2, b will be 3 or 4 channels.) + */ + (void)component_loc(aloc, formata); + bchannels = component_loc(bloc, formatb); + + /* Hence the btoa array. */ + for (i=0; i<4; ++i) if (bloc[i] < 4) + btoa[bloc[i]] = aloc[i]; /* may be '4' for alpha */ + + if (alpha_added) + alpha_added = bloc[0]; /* location of alpha channel in image b */ + + else + alpha_added = 4; /* Won't match an image b channel */ + + if (alpha_removed) + alpha_removed = aloc[0]; /* location of alpha channel in image a */ + + else + alpha_removed = 4; + } + } + + else + { + /* Direct compare is not possible, cancel out all the corresponding local + * variables. + */ + bchannels = 0; + alpha_removed = alpha_added = 4; + btoa[3] = btoa[2] = btoa[1] = btoa[0] = 4; /* 4 == not present */ + } + + for (y=0; ycolormap + a_sample * *ppa++; + else + psa = ppa, ppa += a_sample; + + if (formatb & PNG_FORMAT_FLAG_COLORMAP) + psb = (png_const_bytep)b->colormap + b_sample * *ppb++; + else + psb = ppb, ppb += b_sample; + + /* Do the fast test if possible. */ + if (bchannels) + { + /* Check each 'b' channel against either the corresponding 'a' + * channel or the opaque alpha value, as appropriate. If + * alpha_removed value is set (not 4) then also do this only if the + * 'a' alpha channel (alpha_removed) is opaque; only relevant for + * the 8-bit case. + */ + if (formatb & PNG_FORMAT_FLAG_LINEAR) /* 16-bit checks */ + { + png_const_uint_16p pua = (png_const_uint_16p)psa; + png_const_uint_16p pub = (png_const_uint_16p)psb; + + switch (bchannels) + { + case 4: + if (pua[btoa[3]] != pub[3]) break; + case 3: + if (pua[btoa[2]] != pub[2]) break; + case 2: + if (pua[btoa[1]] != pub[1]) break; + case 1: + if (pua[btoa[0]] != pub[0]) break; + if (alpha_added != 4 && pub[alpha_added] != 65535) break; + continue; /* x loop */ + default: + break; /* impossible */ + } + } + + else if (alpha_removed == 4 || psa[alpha_removed] == 255) + { + switch (bchannels) + { + case 4: + if (psa[btoa[3]] != psb[3]) break; + case 3: + if (psa[btoa[2]] != psb[2]) break; + case 2: + if (psa[btoa[1]] != psb[1]) break; + case 1: + if (psa[btoa[0]] != psb[0]) break; + if (alpha_added != 4 && psb[alpha_added] != 255) break; + continue; /* x loop */ + default: + break; /* impossible */ + } + } + } + + /* If we get to here the fast match failed; do the slow match for this + * pixel. + */ + if (!cmppixel(&tr, psa, psb, x, y) && (a->opts & KEEP_GOING) == 0) + return 0; /* error case */ + } + } + + /* If reqested copy the error values back from the Transform. */ + if (a->opts & ACCUMULATE) + { + tr.error_ptr[0] = tr.error[0]; + tr.error_ptr[1] = tr.error[1]; + tr.error_ptr[2] = tr.error[2]; + tr.error_ptr[3] = tr.error[3]; + } + + return 1; +} + +/* Read the file; how the read gets done depends on which of input_file and + * input_memory have been set. + */ +static int +read_file(Image *image, png_uint_32 format, png_const_colorp background) +{ + memset(&image->image, 0, sizeof image->image); + image->image.version = PNG_IMAGE_VERSION; + + if (image->input_memory != NULL) + { + if (!png_image_begin_read_from_memory(&image->image, image->input_memory, + image->input_memory_size)) + return logerror(image, "memory init: ", image->file_name, ""); + } + + else if (image->input_file != NULL) + { + if (!png_image_begin_read_from_stdio(&image->image, image->input_file)) + return logerror(image, "stdio init: ", image->file_name, ""); + } + + else + { + if (!png_image_begin_read_from_file(&image->image, image->file_name)) + return logerror(image, "file init: ", image->file_name, ""); + } + + /* Have an initialized image with all the data we need plus, maybe, an + * allocated file (myfile) or buffer (mybuffer) that need to be freed. + */ + { + int result; + png_uint_32 image_format; + + /* Print both original and output formats. */ + image_format = image->image.format; + + if (image->opts & VERBOSE) + { + printf("%s %lu x %lu %s -> %s", image->file_name, + (unsigned long)image->image.width, + (unsigned long)image->image.height, + format_names[image_format & FORMAT_MASK], + (format & FORMAT_NO_CHANGE) != 0 || image->image.format == format + ? "no change" : format_names[format & FORMAT_MASK]); + + if (background != NULL) + printf(" background(%d,%d,%d)\n", background->red, + background->green, background->blue); + else + printf("\n"); + + fflush(stdout); + } + + /* 'NO_CHANGE' combined with the color-map flag forces the base format + * flags to be set on read to ensure that the original representation is + * not lost in the pass through a colormap format. + */ + if ((format & FORMAT_NO_CHANGE) != 0) + { + if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && + (image_format & PNG_FORMAT_FLAG_COLORMAP) != 0) + format = (image_format & ~BASE_FORMATS) | (format & BASE_FORMATS); + + else + format = image_format; + } + + image->image.format = format; + + image->stride = PNG_IMAGE_ROW_STRIDE(image->image) + image->stride_extra; + allocbuffer(image); + + result = png_image_finish_read(&image->image, background, + image->buffer+16, (png_int_32)image->stride, image->colormap); + + checkbuffer(image, image->file_name); + + if (result) + return checkopaque(image); + + else + return logerror(image, image->file_name, ": image read failed", ""); + } +} + +/* Reads from a filename, which must be in image->file_name, but uses + * image->opts to choose the method. The file is always read in its native + * format (the one the simplified API suggests). + */ +static int +read_one_file(Image *image) +{ + if (!(image->opts & READ_FILE) || (image->opts & USE_STDIO)) + { + /* memory or stdio. */ + FILE *f = fopen(image->file_name, "rb"); + + if (f != NULL) + { + if (image->opts & READ_FILE) + image->input_file = f; + + else /* memory */ + { + if (fseek(f, 0, SEEK_END) == 0) + { + long int cb = ftell(f); + + if (cb > 0 && (unsigned long int)cb < (size_t)~(size_t)0) + { + png_bytep b = voidcast(png_bytep, malloc((size_t)cb)); + + if (b != NULL) + { + rewind(f); + + if (fread(b, (size_t)cb, 1, f) == 1) + { + fclose(f); + image->input_memory_size = cb; + image->input_memory = b; + } + + else + { + free(b); + return logclose(image, f, image->file_name, + ": read failed: "); + } + } + + else + return logclose(image, f, image->file_name, + ": out of memory: "); + } + + else if (cb == 0) + return logclose(image, f, image->file_name, + ": zero length: "); + + else + return logclose(image, f, image->file_name, + ": tell failed: "); + } + + else + return logclose(image, f, image->file_name, ": seek failed: "); + } + } + + else + return logerror(image, image->file_name, ": open failed: ", + strerror(errno)); + } + + return read_file(image, FORMAT_NO_CHANGE, NULL); +} + +static int +write_one_file(Image *output, Image *image, int convert_to_8bit) +{ + if (image->opts & FAST_WRITE) + image->image.flags |= PNG_IMAGE_FLAG_FAST; + + if (image->opts & USE_STDIO) + { + FILE *f = tmpfile(); + + if (f != NULL) + { + if (png_image_write_to_stdio(&image->image, f, convert_to_8bit, + image->buffer+16, (png_int_32)image->stride, image->colormap)) + { + if (fflush(f) == 0) + { + rewind(f); + initimage(output, image->opts, "tmpfile", image->stride_extra); + output->input_file = f; + if (!checkopaque(image)) + return 0; + } + + else + return logclose(image, f, "tmpfile", ": flush: "); + } + + else + { + fclose(f); + return logerror(image, "tmpfile", ": write failed", ""); + } + } + + else + return logerror(image, "tmpfile", ": open: ", strerror(errno)); + } + + else + { + static int counter = 0; + char name[32]; + + sprintf(name, "TMP%d.png", ++counter); + + if (png_image_write_to_file(&image->image, name, convert_to_8bit, + image->buffer+16, (png_int_32)image->stride, image->colormap)) + { + initimage(output, image->opts, output->tmpfile_name, + image->stride_extra); + /* Afterwards, or freeimage will delete it! */ + strcpy(output->tmpfile_name, name); + + if (!checkopaque(image)) + return 0; + } + + else + return logerror(image, name, ": write failed", ""); + } + + /* 'output' has an initialized temporary image, read this back in and compare + * this against the original: there should be no change since the original + * format was written unmodified unless 'convert_to_8bit' was specified. + * However, if the original image was color-mapped, a simple read will zap + * the linear, color and maybe alpha flags, this will cause spurious failures + * under some circumstances. + */ + if (read_file(output, image->image.format | FORMAT_NO_CHANGE, NULL)) + { + png_uint_32 original_format = image->image.format; + + if (convert_to_8bit) + original_format &= ~PNG_FORMAT_FLAG_LINEAR; + + if ((output->image.format & BASE_FORMATS) != + (original_format & BASE_FORMATS)) + return logerror(image, image->file_name, ": format changed on read: ", + output->file_name); + + return compare_two_images(image, output, 0/*via linear*/, NULL); + } + + else + return logerror(output, output->tmpfile_name, + ": read of new file failed", ""); +} + +static int +testimage(Image *image, png_uint_32 opts, format_list *pf) +{ + int result; + Image copy; + + /* Copy the original data, stealing it from 'image' */ + checkopaque(image); + copy = *image; + + copy.opts = opts; + copy.buffer = NULL; + copy.bufsize = 0; + copy.allocsize = 0; + + image->input_file = NULL; + image->input_memory = NULL; + image->input_memory_size = 0; + image->tmpfile_name[0] = 0; + + { + png_uint_32 counter; + Image output; + + newimage(&output); + + result = 1; + + /* Use the low bit of 'counter' to indicate whether or not to do alpha + * removal with a background color or by composting onto the image; this + * step gets skipped if it isn't relevant + */ + for (counter=0; counter<2*FORMAT_COUNT; ++counter) + if (format_isset(pf, counter >> 1)) + { + png_uint_32 format = counter >> 1; + + png_color background_color; + png_colorp background = NULL; + + /* If there is a format change that removes the alpha channel then + * the background is relevant. If the output is 8-bit color-mapped + * then a background color *must* be provided, otherwise there are + * two tests to do - one with a color, the other with NULL. The + * NULL test happens second. + */ + if ((counter & 1) == 0) + { + if ((format & PNG_FORMAT_FLAG_ALPHA) == 0 && + (image->image.format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + /* Alpha/transparency will be removed, the background is + * relevant: make it a color the first time + */ + random_color(&background_color); + background = &background_color; + + /* BUT if the output is to a color-mapped 8-bit format then + * the background must always be a color, so increment 'counter' + * to skip the NULL test. + */ + if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && + (format & PNG_FORMAT_FLAG_LINEAR) == 0) + ++counter; + } + + /* Otherwise an alpha channel is not being eliminated, just leave + * background NULL and skip the (counter & 1) NULL test. + */ + else + ++counter; + } + /* else just use NULL for background */ + + resetimage(©); + copy.opts = opts; /* in case read_file needs to change it */ + + result = read_file(©, format, background); + if (!result) + break; + + /* Make sure the file just read matches the original file. */ + result = compare_two_images(image, ©, 0/*via linear*/, background); + if (!result) + break; + + /* Write the *copy* just made to a new file to make sure the write side + * works ok. Check the conversion to sRGB if the copy is linear. + */ + output.opts = opts; + result = write_one_file(&output, ©, 0/*convert to 8bit*/); + if (!result) + break; + + /* Validate against the original too; the background is needed here + * as well so that compare_two_images knows what color was used. + */ + result = compare_two_images(image, &output, 0, background); + if (!result) + break; + + if ((format & PNG_FORMAT_FLAG_LINEAR) != 0 && + (format & PNG_FORMAT_FLAG_COLORMAP) == 0) + { + /* 'output' is linear, convert to the corresponding sRGB format. */ + output.opts = opts; + result = write_one_file(&output, ©, 1/*convert to 8bit*/); + if (!result) + break; + + /* This may involve a conversion via linear; in the ideal world this + * would round-trip correctly, but libpng 1.5.7 is not the ideal + * world so allow a drift (error_via_linear). + * + * 'image' has an alpha channel but 'output' does not then there + * will a strip-alpha-channel operation (because 'output' is + * linear), handle this by composing on black when doing the + * comparison. + */ + result = compare_two_images(image, &output, 1/*via_linear*/, + background); + if (!result) + break; + } + } + + freeimage(&output); + } + + freeimage(©); + + return result; +} + +static int +test_one_file(const char *file_name, format_list *formats, png_uint_32 opts, + int stride_extra, int log_pass) +{ + int result; + Image image; + + newimage(&image); + initimage(&image, opts, file_name, stride_extra); + result = read_one_file(&image); + if (result) + result = testimage(&image, opts, formats); + freeimage(&image); + + /* Ensure that stderr is flushed into any log file */ + fflush(stderr); + + if (log_pass) + { + if (result) + printf("PASS:"); + + else + printf("FAIL:"); + + print_opts(opts); + printf(" %s\n", file_name); + /* stdout may not be line-buffered if it is piped to a file, so: */ + fflush(stdout); + } + + else if (!result) + exit(1); + + return result; +} + +int +main(int argc, char **argv) +{ + png_uint_32 opts = FAST_WRITE; + format_list formats; + const char *touch = NULL; + int log_pass = 0; + int redundant = 0; + int stride_extra = 0; + int retval = 0; + int c; + + init_sRGB_to_d(); +#if 0 + init_error_via_linear(); +#endif + format_init(&formats); + + for (c=1; c FORMAT_COUNT) + exit(1); + + format_set(&formats, format); + } + else if (arg[0] == '-' && arg[1] != 0 && (arg[1] != '0' || arg[2] != 0)) + { + fflush(stdout); + fprintf(stderr, "%s: unknown option: %s\n", argv[0], arg); + exit(1); + } + else + { + if (format_is_initial(&formats)) + format_default(&formats, redundant); + + if (arg[0] == '-') + { + const int term = (arg[1] == '0' ? 0 : '\n'); + unsigned int ich = 0; + + /* Loop reading files, use a static buffer to simplify this and just + * stop if the name gets to long. + */ + static char buffer[4096]; + + do + { + int ch = getchar(); + + /* Don't allow '\0' in file names, and terminate with '\n' or, + * for -0, just '\0' (use -print0 to find to make this work!) + */ + if (ch == EOF || ch == term || ch == 0) + { + buffer[ich] = 0; + + if (ich > 0 && !test_one_file(buffer, &formats, opts, + stride_extra, log_pass)) + retval = 1; + + if (ch == EOF) + break; + + ich = 0; + --ich; /* so that the increment below sets it to 0 again */ + } + + else + buffer[ich] = (char)ch; + } while (++ich < sizeof buffer); + + if (ich) + { + buffer[32] = 0; + buffer[4095] = 0; + fprintf(stderr, "%s...%s: file name too long\n", buffer, + buffer+(4096-32)); + exit(1); + } + } + + else if (!test_one_file(arg, &formats, opts, stride_extra, log_pass)) + retval = 1; + } + } + + if (opts & ACCUMULATE) + { + unsigned int in; + + printf("static png_uint_16 gpc_error[16/*in*/][16/*out*/][4/*a*/] =\n"); + printf("{\n"); + for (in=0; in<16; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<16; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 15) + { + putchar(','); + if (out % 4 == 3) printf("\n "); + } + } + printf("\n }"); + + if (in < 15) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + + printf("static png_uint_16 gpc_error_via_linear[16][4/*out*/][4] =\n"); + printf("{\n"); + for (in=0; in<16; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<4; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error_via_linear[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 3) + putchar(','); + } + printf("\n }"); + + if (in < 15) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + + printf("static png_uint_16 gpc_error_to_colormap[8/*i*/][8/*o*/][4] =\n"); + printf("{\n"); + for (in=0; in<8; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<8; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error_to_colormap[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 7) + { + putchar(','); + if (out % 4 == 3) printf("\n "); + } + } + printf("\n }"); + + if (in < 7) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + } + + if (retval == 0 && touch != NULL) + { + FILE *fsuccess = fopen(touch, "wt"); + + if (fsuccess != NULL) + { + int error = 0; + fprintf(fsuccess, "PNG simple API tests succeeded\n"); + fflush(fsuccess); + error = ferror(fsuccess); + + if (fclose(fsuccess) || error) + { + fflush(stdout); + fprintf(stderr, "%s: write failed\n", touch); + exit(1); + } + } + + else + { + fflush(stdout); + fprintf(stderr, "%s: open failed\n", touch); + exit(1); + } + } + + return retval; +} diff -ru4NwbB libpng-1.5.10/contrib/libtests/pngvalid.c libpng-1.6.0beta22/contrib/libtests/pngvalid.c --- libpng-1.5.10/contrib/libtests/pngvalid.c 2012-01-01 14:49:28.273121000 -0600 +++ libpng-1.6.0beta22/contrib/libtests/pngvalid.c 2012-05-23 12:30:58.871748302 -0500 @@ -1,8 +1,8 @@ /* pngvalid.c - validate libpng by constructing then reading png files. * - * Last changed in libpng 1.5.8 [(PENDING RELEASE)] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 2012 Glenn Randers-Pehrson * Written by John Cunningham Bowler * * This code is released under the libpng license. @@ -24,9 +24,13 @@ #define _GNU_SOURCE 1 /* For the floating point exception extension */ #include -#ifdef HAVE_FEENABLEEXCEPT +#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H) +# include +#endif + +#ifdef HAVE_FEENABLEEXCEPT /* from config.h, if included */ # include #endif /* Define the following to use this test against your installed libpng, rather @@ -73,8 +77,15 @@ #define PNG_GAMMA_THRESHOLD_FIXED\ ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1)) #endif +#if PNG_LIBPNG_VER < 10600 + /* 1.6.0 constifies many APIs, the following exists to allow pngvalid to be + * compiled against earlier versions. + */ +# define png_const_strutp png_structp +#endif + #include "zlib.h" /* For crc32 */ #include /* For floating point constants */ #include /* For malloc */ @@ -777,9 +788,9 @@ } /* Generate an error message (in the given buffer) */ static size_t -store_message(png_store *ps, png_structp pp, char *buffer, size_t bufsize, +store_message(png_store *ps, png_const_structp pp, char *buffer, size_t bufsize, size_t pos, PNG_CONST char *msg) { if (pp != NULL && pp == ps->pread) { @@ -817,9 +828,9 @@ } /* Verbose output to the error stream: */ static void -store_verbose(png_store *ps, png_structp pp, png_const_charp prefix, +store_verbose(png_store *ps, png_const_structp pp, png_const_charp prefix, png_const_charp message) { char buffer[512]; @@ -832,9 +843,10 @@ } /* Log an error or warning - the relevant count is always incremented. */ static void -store_log(png_store* ps, png_structp pp, png_const_charp message, int is_error) +store_log(png_store* ps, png_const_structp pp, png_const_charp message, + int is_error) { /* The warning is copied to the error buffer if there are no errors and it is * the first warning. The error is copied to the error buffer if it is the * first error (overwriting any prior warnings). @@ -861,10 +873,11 @@ } /* Functions to use as PNG callbacks. */ static void -store_error(png_structp pp, png_const_charp message) /* PNG_NORETURN */ +store_error(png_structp ppIn, png_const_charp message) /* PNG_NORETURN */ { + png_const_structp pp = ppIn; png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); if (!ps->expect_error) store_log(ps, pp, message, 1 /* error */); @@ -876,10 +889,11 @@ } } static void -store_warning(png_structp pp, png_const_charp message) +store_warning(png_structp ppIn, png_const_charp message) { + png_const_structp pp = ppIn; png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); if (!ps->expect_warning) store_log(ps, pp, message, 0 /* warning */); @@ -891,9 +905,9 @@ * the buffer is big enough, the png_structp is for errors. */ /* Return a single row from the correct image. */ static png_bytep -store_image_row(PNG_CONST png_store* ps, png_structp pp, int nImage, +store_image_row(PNG_CONST png_store* ps, png_const_structp pp, int nImage, png_uint_32 y) { png_size_t coffset = (nImage * ps->image_h + y) * (ps->cb_row + 5) + 2; @@ -906,9 +920,9 @@ return ps->image + coffset; } static void -store_image_free(png_store *ps, png_structp pp) +store_image_free(png_store *ps, png_const_structp pp) { if (ps->image != NULL) { png_bytep image = ps->image; @@ -928,10 +942,10 @@ } } static void -store_ensure_image(png_store *ps, png_structp pp, int nImages, png_size_t cbRow, - png_uint_32 cRows) +store_ensure_image(png_store *ps, png_const_structp pp, int nImages, + png_size_t cbRow, png_uint_32 cRows) { png_size_t cb = nImages * cRows * (cbRow + 5); if (ps->cb_image < cb) @@ -994,9 +1008,9 @@ } } static void -store_image_check(PNG_CONST png_store* ps, png_structp pp, int iImage) +store_image_check(PNG_CONST png_store* ps, png_const_structp pp, int iImage) { png_const_bytep image = ps->image; if (image[-1] != 0xed || image[ps->cb_image] != 0xfe) @@ -1024,10 +1038,11 @@ } } static void -store_write(png_structp pp, png_bytep pb, png_size_t st) +store_write(png_structp ppIn, png_bytep pb, png_size_t st) { + png_const_structp pp = ppIn; png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); if (ps->pwrite != pp) png_error(pp, "store state damaged"); @@ -1051,11 +1066,11 @@ } } static void -store_flush(png_structp pp) +store_flush(png_structp ppIn) { - UNUSED(pp) /*DOES NOTHING*/ + UNUSED(ppIn) /*DOES NOTHING*/ } static size_t store_read_buffer_size(png_store *ps) @@ -1144,10 +1159,11 @@ } } static void -store_read(png_structp pp, png_bytep pb, png_size_t st) +store_read(png_structp ppIn, png_bytep pb, png_size_t st) { + png_const_structp pp = ppIn; png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); if (ps == NULL || ps->pread != pp) png_error(pp, "bad store read call"); @@ -1233,9 +1249,9 @@ * struct has returned) will simply keep going and free (or attempt to free) * all the memory. */ static void -store_pool_error(png_store *ps, png_structp pp, PNG_CONST char *msg) +store_pool_error(png_store *ps, png_const_structp pp, PNG_CONST char *msg) { if (pp != NULL) png_error(pp, msg); @@ -1246,9 +1262,9 @@ store_log(ps, pp, msg, 1 /* error */); } static void -store_memory_free(png_structp pp, store_pool *pool, store_memory *memory) +store_memory_free(png_const_structp pp, store_pool *pool, store_memory *memory) { /* Note that pp may be NULL (see store_pool_delete below), the caller has * found 'memory' in pool->list *and* unlinked this entry, so this is a valid * pointer (for sure), but the contents may have been trashed. @@ -1332,10 +1348,11 @@ } /* The memory callbacks: */ static png_voidp -store_malloc(png_structp pp, png_alloc_size_t cb) +store_malloc(png_structp ppIn, png_alloc_size_t cb) { + png_const_structp pp = ppIn; store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); store_memory *new = voidcast(store_memory*, malloc(cb + (sizeof *new) + (sizeof pool->mark))); @@ -1380,10 +1397,11 @@ return new; } static void -store_free(png_structp pp, png_voidp memory) +store_free(png_structp ppIn, png_voidp memory) { + png_const_structp pp = ppIn; store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); store_memory *this = voidcast(store_memory*, memory), **test; /* Because libpng calls store_free with a dummy png_struct when deleting @@ -2535,10 +2553,11 @@ } /* The callback: */ static void -modifier_read(png_structp pp, png_bytep pb, png_size_t st) +modifier_read(png_structp ppIn, png_bytep pb, png_size_t st) { + png_const_structp pp = ppIn; png_modifier *pm = voidcast(png_modifier*, png_get_io_ptr(pp)); if (pm == NULL || pm->this.pread != pp) png_error(pp, "bad modifier_read call"); @@ -2883,11 +2902,11 @@ /* Always put in black and white plus the six primary and secondary colors. */ for (; i<8; ++i) { - values[i][1] = (i&1) ? 255 : 0; - values[i][2] = (i&2) ? 255 : 0; - values[i][3] = (i&4) ? 255 : 0; + values[i][1] = (png_byte)((i&1) ? 255U : 0U); + values[i][2] = (png_byte)((i&2) ? 255U : 0U); + values[i][3] = (png_byte)((i&4) ? 255U : 0U); } /* Then add 62 grays (one quarter of the remaining 256 slots). */ { @@ -2969,8 +2988,9 @@ /* Initialize a standard palette on a write stream. The 'do_tRNS' argument * indicates whether or not to also set the tRNS chunk. */ +/* TODO: the png_structp here can probably be 'const' in the future */ static void init_standard_palette(png_store *ps, png_structp pp, png_infop pi, int npalette, int do_tRNS) { @@ -3017,9 +3037,9 @@ /* The number of passes is related to the interlace type. There was no libpng * API to determine this prior to 1.5, so we need an inquiry function: */ static int -npasses_from_interlace_type(png_structp pp, int interlace_type) +npasses_from_interlace_type(png_const_structp pp, int interlace_type) { switch (interlace_type) { default: @@ -3033,9 +3053,9 @@ } } static unsigned int -bit_size(png_structp pp, png_byte colour_type, png_byte bit_depth) +bit_size(png_const_structp pp, png_byte colour_type, png_byte bit_depth) { switch (colour_type) { default: png_error(pp, "invalid color type"); @@ -3058,9 +3078,10 @@ #define STANDARD_ROWMAX TRANSFORM_ROWMAX /* The larger of the two */ #define SIZE_HEIGHTMAX 16 /* Maximum range of size images */ static size_t -transform_rowsize(png_structp pp, png_byte colour_type, png_byte bit_depth) +transform_rowsize(png_const_structp pp, png_byte colour_type, + png_byte bit_depth) { return (TRANSFORM_WIDTH * bit_size(pp, colour_type, bit_depth)) / 8; } @@ -3069,9 +3090,9 @@ */ #define transform_width(pp, colour_type, bit_depth) TRANSFORM_WIDTH static png_uint_32 -transform_height(png_structp pp, png_byte colour_type, png_byte bit_depth) +transform_height(png_const_structp pp, png_byte colour_type, png_byte bit_depth) { switch (bit_size(pp, colour_type, bit_depth)) { case 1: @@ -3102,9 +3123,9 @@ /* The following can only be defined here, now we have the definitions * of the transform image sizes. */ static png_uint_32 -standard_width(png_structp pp, png_uint_32 id) +standard_width(png_const_structp pp, png_uint_32 id) { png_uint_32 width = WIDTH_FROM_ID(id); UNUSED(pp) @@ -3114,9 +3135,9 @@ return width; } static png_uint_32 -standard_height(png_structp pp, png_uint_32 id) +standard_height(png_const_structp pp, png_uint_32 id) { png_uint_32 height = HEIGHT_FROM_ID(id); if (height == 0) @@ -3125,9 +3146,9 @@ return height; } static png_uint_32 -standard_rowsize(png_structp pp, png_uint_32 id) +standard_rowsize(png_const_structp pp, png_uint_32 id) { png_uint_32 width = standard_width(pp, id); /* This won't overflow: */ @@ -3135,50 +3156,55 @@ return (width + 7) / 8; } static void -transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], +transform_row(png_const_structp pp, png_byte buffer[TRANSFORM_ROWMAX], png_byte colour_type, png_byte bit_depth, png_uint_32 y) { png_uint_32 v = y << 7; png_uint_32 i = 0; switch (bit_size(pp, colour_type, bit_depth)) { case 1: - while (i<128/8) buffer[i] = v & 0xff, v += 17, ++i; + while (i<128/8) buffer[i] = (png_byte)(v & 0xff), v += 17, ++i; return; case 2: - while (i<128/4) buffer[i] = v & 0xff, v += 33, ++i; + while (i<128/4) buffer[i] = (png_byte)(v & 0xff), v += 33, ++i; return; case 4: - while (i<128/2) buffer[i] = v & 0xff, v += 65, ++i; + while (i<128/2) buffer[i] = (png_byte)(v & 0xff), v += 65, ++i; return; case 8: /* 256 bytes total, 128 bytes in each row set as follows: */ - while (i<128) buffer[i] = v & 0xff, ++v, ++i; + while (i<128) buffer[i] = (png_byte)(v & 0xff), ++v, ++i; return; case 16: /* Generate all 65536 pixel values in order, which includes the 8 bit * GA case as well as the 16 bit G case. */ while (i<128) - buffer[2*i] = (v>>8) & 0xff, buffer[2*i+1] = v & 0xff, ++v, ++i; + { + buffer[2*i] = (png_byte)((v>>8) & 0xff); + buffer[2*i+1] = (png_byte)(v & 0xff); + ++v; + ++i; + } return; case 24: /* 65535 pixels, but rotate the values. */ while (i<128) { /* Three bytes per pixel, r, g, b, make b by r^g */ - buffer[3*i+0] = (v >> 8) & 0xff; - buffer[3*i+1] = v & 0xff; - buffer[3*i+2] = ((v >> 8) ^ v) & 0xff; + buffer[3*i+0] = (png_byte)((v >> 8) & 0xff); + buffer[3*i+1] = (png_byte)(v & 0xff); + buffer[3*i+2] = (png_byte)(((v >> 8) ^ v) & 0xff); ++v; ++i; } @@ -3187,12 +3213,12 @@ case 32: /* 65535 pixels, r, g, b, a; just replicate */ while (i<128) { - buffer[4*i+0] = (v >> 8) & 0xff; - buffer[4*i+1] = v & 0xff; - buffer[4*i+2] = (v >> 8) & 0xff; - buffer[4*i+3] = v & 0xff; + buffer[4*i+0] = (png_byte)((v >> 8) & 0xff); + buffer[4*i+1] = (png_byte)(v & 0xff); + buffer[4*i+2] = (png_byte)((v >> 8) & 0xff); + buffer[4*i+3] = (png_byte)(v & 0xff); ++v; ++i; } @@ -3204,16 +3230,16 @@ */ while (i<128) { png_uint_32 t = v++; - buffer[6*i+0] = (t >> 8) & 0xff; - buffer[6*i+1] = t & 0xff; + buffer[6*i+0] = (png_byte)((t >> 8) & 0xff); + buffer[6*i+1] = (png_byte)(t & 0xff); t *= 257; - buffer[6*i+2] = (t >> 8) & 0xff; - buffer[6*i+3] = t & 0xff; + buffer[6*i+2] = (png_byte)((t >> 8) & 0xff); + buffer[6*i+3] = (png_byte)(t & 0xff); t *= 17; - buffer[6*i+4] = (t >> 8) & 0xff; - buffer[6*i+5] = t & 0xff; + buffer[6*i+4] = (png_byte)((t >> 8) & 0xff); + buffer[6*i+5] = (png_byte)(t & 0xff); ++i; } return; @@ -3222,17 +3248,17 @@ /* As above in the 32 bit case. */ while (i<128) { png_uint_32 t = v++; - buffer[8*i+0] = (t >> 8) & 0xff; - buffer[8*i+1] = t & 0xff; - buffer[8*i+4] = (t >> 8) & 0xff; - buffer[8*i+5] = t & 0xff; + buffer[8*i+0] = (png_byte)((t >> 8) & 0xff); + buffer[8*i+1] = (png_byte)(t & 0xff); + buffer[8*i+4] = (png_byte)((t >> 8) & 0xff); + buffer[8*i+5] = (png_byte)(t & 0xff); t *= 257; - buffer[8*i+2] = (t >> 8) & 0xff; - buffer[8*i+3] = t & 0xff; - buffer[8*i+6] = (t >> 8) & 0xff; - buffer[8*i+7] = t & 0xff; + buffer[8*i+2] = (png_byte)((t >> 8) & 0xff); + buffer[8*i+3] = (png_byte)(t & 0xff); + buffer[8*i+6] = (png_byte)((t >> 8) & 0xff); + buffer[8*i+7] = (png_byte)(t & 0xff); ++i; } return; @@ -3508,8 +3534,32 @@ png_set_IHDR(pp, pi, w, h, bit_depth, colour_type, interlace_type, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); +#ifdef PNG_TEXT_SUPPORTED + { + static char key[] = "image name"; /* must be writeable */ + size_t pos; + png_text text; + char copy[FILE_NAME_SIZE]; + + /* Use a compressed text string to test the correct interaction of text + * compression and IDAT compression. + */ + text.compression = PNG_TEXT_COMPRESSION_zTXt; + text.key = key; + /* Yuck: the text must be writable! */ + pos = safecat(copy, sizeof copy, 0, ps->wname); + text.text = copy; + text.text_length = pos; + text.itxt_length = 0; + text.lang = 0; + text.lang_key = 0; + + png_set_text(pp, pi, &text, 1); + } +#endif + if (colour_type == 3) /* palette */ init_standard_palette(ps, pp, pi, 1U << bit_depth, 0/*do tRNS*/); png_write_info(pp, pi); @@ -3585,8 +3635,29 @@ } } } +#ifdef PNG_TEXT_SUPPORTED + { + static char key[] = "end marker"; + static char comment[] = "end"; + png_text text; + + /* Use a compressed text string to test the correct interaction of text + * compression and IDAT compression. + */ + text.compression = PNG_TEXT_COMPRESSION_zTXt; + text.key = key; + text.text = comment; + text.text_length = (sizeof comment)-1; + text.itxt_length = 0; + text.lang = 0; + text.lang_key = 0; + + png_set_text(pp, pi, &text, 1); + } +#endif + png_write_end(pp, pi); /* And store this under the appropriate id, then clean up. */ store_storefile(ps, id); @@ -3651,10 +3722,10 @@ } /* Return a row based on image id and 'y' for checking: */ static void -standard_row(png_structp pp, png_byte std[STANDARD_ROWMAX], png_uint_32 id, - png_uint_32 y) +standard_row(png_const_structp pp, png_byte std[STANDARD_ROWMAX], + png_uint_32 id, png_uint_32 y) { if (WIDTH_FROM_ID(id) == 0) transform_row(pp, std, COL_FROM_ID(id), DEPTH_FROM_ID(id), y); else @@ -3666,8 +3737,11 @@ /* Like 'make_standard' but errors are deliberately introduced into the calls * to ensure that they get detected - it should not be possible to write an * invalid image with libpng! */ +/* TODO: the 'set' functions can probably all be made to take a + * png_const_structp rather than a modifiable one. + */ #ifdef PNG_WARNINGS_SUPPORTED static void sBIT0_error_fn(png_structp pp, png_infop pi) { @@ -3882,8 +3956,11 @@ Try { png_const_charp correct = "29 Aug 2079 13:53:60 +0000"; png_const_charp result; +# if PNG_LIBPNG_VER >= 10600 + char timestring[29]; +# endif png_structp pp; png_time pt; pp = set_store_for_write(ps, NULL, "libpng formatting test"); @@ -3899,9 +3976,17 @@ pt.hour = 13; pt.minute = 53; pt.second = 60; /* a leap second */ +# if PNG_LIBPNG_VER < 10600 result = png_convert_to_rfc1123(pp, &pt); +# else + if (png_convert_to_rfc1123_buffer(timestring, &pt)) + result = timestring; + + else + result = NULL; +# endif if (result == NULL) png_error(pp, "png_convert_to_rfc1123 failed"); @@ -4058,9 +4143,10 @@ * store_palette format. This returns 1 if there is any transparency in the * palette (it does not check for a transparent colour in the non-palette case.) */ static int -read_palette(store_palette palette, int *npalette, png_structp pp, png_infop pi) +read_palette(store_palette palette, int *npalette, png_const_structp pp, + png_infop pi) { png_colorp pal; png_bytep trans_alpha; int num; @@ -4149,9 +4235,10 @@ /* Utility to validate the palette if it should not have changed (the * non-transform case). */ static void -standard_palette_validate(standard_display *dp, png_structp pp, png_infop pi) +standard_palette_validate(standard_display *dp, png_const_structp pp, + png_infop pi) { int npalette; store_palette palette; @@ -4343,10 +4430,10 @@ * 'rowbytes' value, otherwise png_get_rowbytes will refer to the untransformed * image. */ static void -standard_info_part2(standard_display *dp, png_structp pp, png_infop pi, - int nImages) +standard_info_part2(standard_display *dp, png_const_structp pp, + png_const_infop pi, int nImages) { /* Record cbRow now that it can be found. */ dp->pixel_size = bit_size(pp, png_get_color_type(pp, pi), png_get_bit_depth(pp, pi)); @@ -4402,10 +4489,11 @@ standard_info_imp(dp, pp, pi, 1 /*only one image*/); } static void -progressive_row(png_structp pp, png_bytep new_row, png_uint_32 y, int pass) +progressive_row(png_structp ppIn, png_bytep new_row, png_uint_32 y, int pass) { + png_const_structp pp = ppIn; PNG_CONST standard_display *dp = voidcast(standard_display*, png_get_progressive_ptr(pp)); /* When handling interlacing some rows will be absent in each pass, the @@ -4521,10 +4609,118 @@ */ png_read_end(pp, pi); } +#ifdef PNG_TEXT_SUPPORTED static void -standard_row_validate(standard_display *dp, png_structp pp, +standard_check_text(png_const_structp pp, png_const_textp tp, + png_const_charp keyword, png_const_charp text) +{ + char msg[1024]; + size_t pos = safecat(msg, sizeof msg, 0, "text: "); + size_t ok; + + pos = safecat(msg, sizeof msg, pos, keyword); + pos = safecat(msg, sizeof msg, pos, ": "); + ok = pos; + + if (tp->compression != PNG_TEXT_COMPRESSION_zTXt) + { + char buf[64]; + + sprintf(buf, "compression [%d->%d], ", PNG_TEXT_COMPRESSION_zTXt, + tp->compression); + pos = safecat(msg, sizeof msg, pos, buf); + } + + if (tp->key == NULL || strcmp(tp->key, keyword) != 0) + { + pos = safecat(msg, sizeof msg, pos, "keyword \""); + if (tp->key != NULL) + { + pos = safecat(msg, sizeof msg, pos, tp->key); + pos = safecat(msg, sizeof msg, pos, "\", "); + } + + else + pos = safecat(msg, sizeof msg, pos, "null, "); + } + + if (tp->text == NULL) + pos = safecat(msg, sizeof msg, pos, "text lost, "); + + else + { + if (tp->text_length != strlen(text)) + { + char buf[64]; + sprintf(buf, "text length changed[%lu->%lu], ", + (unsigned long)strlen(text), (unsigned long)tp->text_length); + pos = safecat(msg, sizeof msg, pos, buf); + } + + if (strcmp(tp->text, text) != 0) + { + pos = safecat(msg, sizeof msg, pos, "text becomes \""); + pos = safecat(msg, sizeof msg, pos, tp->text); + pos = safecat(msg, sizeof msg, pos, "\" (was \""); + pos = safecat(msg, sizeof msg, pos, text); + pos = safecat(msg, sizeof msg, pos, "\"), "); + } + } + + if (tp->itxt_length != 0) + pos = safecat(msg, sizeof msg, pos, "iTXt length set, "); + + if (tp->lang != NULL) + { + pos = safecat(msg, sizeof msg, pos, "iTXt language \""); + pos = safecat(msg, sizeof msg, pos, tp->lang); + pos = safecat(msg, sizeof msg, pos, "\", "); + } + + if (tp->lang_key != NULL) + { + pos = safecat(msg, sizeof msg, pos, "iTXt keyword \""); + pos = safecat(msg, sizeof msg, pos, tp->lang_key); + pos = safecat(msg, sizeof msg, pos, "\", "); + } + + if (pos > ok) + { + msg[pos-2] = '\0'; /* Remove the ", " at the end */ + png_error(pp, msg); + } +} + +static void +standard_text_validate(standard_display *dp, png_const_structp pp, + png_const_infop pi) +{ + png_textp tp = NULL; + png_uint_32 num_text = png_get_text(pp, pi, &tp, NULL); + + if (num_text == 2 && tp != NULL) + { + standard_check_text(pp, tp, "image name", dp->ps->current->name); + standard_check_text(pp, tp+1, "end marker", "end"); + } + + else + { + char msg[64]; + + sprintf(msg, "expected two text items, got %lu", + (unsigned long)num_text); + png_error(pp, msg); + } +} +#else +# define standard_text_validate(dp,pp,pi) ((void)0) +#endif + +static void +standard_row_validate(standard_display *dp, png_const_structp pp, int iImage, int iDisplay, png_uint_32 y) { int where; png_byte std[STANDARD_ROWMAX]; @@ -4552,10 +4748,10 @@ (where = pixel_cmp(std, store_image_row(dp->ps, pp, iImage, y), dp->bit_width)) != 0) { char msg[64]; - sprintf(msg, "PNG image row[%d][%d] changed from %.2x to %.2x", y, - where-1, std[where-1], + sprintf(msg, "PNG image row[%lu][%d] changed from %.2x to %.2x", + (unsigned long)y, where-1, std[where-1], store_image_row(dp->ps, pp, iImage, y)[where-1]); png_error(pp, msg); } @@ -4570,17 +4766,17 @@ (where = pixel_cmp(std, store_image_row(dp->ps, pp, iDisplay, y), dp->bit_width)) != 0) { char msg[64]; - sprintf(msg, "display row[%d][%d] changed from %.2x to %.2x", y, - where-1, std[where-1], + sprintf(msg, "display row[%lu][%d] changed from %.2x to %.2x", + (unsigned long)y, where-1, std[where-1], store_image_row(dp->ps, pp, iDisplay, y)[where-1]); png_error(pp, msg); } } static void -standard_image_validate(standard_display *dp, png_structp pp, int iImage, +standard_image_validate(standard_display *dp, png_const_structp pp, int iImage, int iDisplay) { png_uint_32 y; @@ -4597,18 +4793,20 @@ dp->ps->validated = 1; } static void -standard_end(png_structp pp, png_infop pi) +standard_end(png_structp ppIn, png_infop pi) { + png_const_structp pp = ppIn; standard_display *dp = voidcast(standard_display*, png_get_progressive_ptr(pp)); UNUSED(pi) /* Validate the image - progressive reading only produces one variant for * interlaced images. */ + standard_text_validate(dp, pp, pi); standard_image_validate(dp, pp, 0, -1); } /* A single test run checking the standard image to ensure it is not damaged. */ @@ -4676,9 +4874,12 @@ /* After the last pass loop over the rows again to check that the * image is correct. */ if (!d.speed) + { + standard_text_validate(&d, pp, pi); standard_image_validate(&d, pp, 0, 1); + } else d.ps->validated = 1; } } @@ -5105,9 +5306,9 @@ * in the libpng implementation!) The png_structp is solely to allow error * reporting via png_error and png_warning. */ void (*mod)(PNG_CONST struct image_transform *this, image_pixel *that, - png_structp pp, PNG_CONST struct transform_display *display); + png_const_structp pp, PNG_CONST struct transform_display *display); /* Add this transform to the list and return true if the transform is * meaningful for this colour type and bit depth - if false then the * transform should have no effect on the image so there's not a lot of @@ -5200,9 +5401,9 @@ } static void image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that, - png_structp pp, PNG_CONST transform_display *display) + png_const_structp pp, PNG_CONST transform_display *display) { PNG_CONST unsigned int scale = (1U<sample_depth)-1; UNUSED(this) @@ -5429,9 +5630,9 @@ pp, pi); } static void -transform_range_check(png_structp pp, unsigned int r, unsigned int g, +transform_range_check(png_const_structp pp, unsigned int r, unsigned int g, unsigned int b, unsigned int a, unsigned int in_digitized, double in, unsigned int out, png_byte sample_depth, double err, double limit, PNG_CONST char *name, double digitization_error) { @@ -5472,9 +5673,10 @@ } } static void -transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) +transform_image_validate(transform_display *dp, png_const_structp pp, + png_infop pi) { /* Constants for the loop below: */ PNG_CONST png_store* PNG_CONST ps = dp->this.ps; PNG_CONST png_byte in_ct = dp->this.colour_type; @@ -5630,10 +5832,11 @@ dp->this.ps->validated = 1; } static void -transform_end(png_structp pp, png_infop pi) +transform_end(png_structp ppIn, png_infop pi) { + png_const_structp pp = ppIn; transform_display *dp = voidcast(transform_display*, png_get_progressive_ptr(pp)); if (!dp->this.speed) @@ -5777,9 +5980,10 @@ } static void image_transform_png_set_palette_to_rgb_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { if (that->colour_type == PNG_COLOR_TYPE_PALETTE) image_pixel_convert_PLTE(that); @@ -5814,9 +6018,10 @@ } static void image_transform_png_set_tRNS_to_alpha_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { /* LIBPNG BUG: this always forces palette images to RGB. */ if (that->colour_type == PNG_COLOR_TYPE_PALETTE) image_pixel_convert_PLTE(that); @@ -5871,9 +6076,10 @@ } static void image_transform_png_set_gray_to_rgb_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { /* NOTE: we can actually pend the tRNS processing at this point because we * can correctly recognize the original pixel value even though we have * mapped the one gray channel to the three RGB ones, but in fact libpng @@ -5929,9 +6135,10 @@ } static void image_transform_png_set_expand_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { /* The general expand case depends on what the colour type is: */ if (that->colour_type == PNG_COLOR_TYPE_PALETTE) image_pixel_convert_PLTE(that); @@ -5978,9 +6185,9 @@ } static void image_transform_png_set_expand_gray_1_2_4_to_8_mod( - PNG_CONST image_transform *this, image_pixel *that, png_structp pp, + PNG_CONST image_transform *this, image_pixel *that, png_const_structp pp, PNG_CONST transform_display *display) { image_transform_png_set_expand_mod(this, that, pp, display); } @@ -6009,9 +6216,10 @@ } static void image_transform_png_set_expand_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { /* Expect expand_16 to expand everything to 16 bits as a result of also * causing 'expand' to happen. */ @@ -6056,9 +6264,10 @@ } static void image_transform_png_set_scale_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { if (that->bit_depth == 16) { that->sample_depth = that->bit_depth = 8; @@ -6099,9 +6308,10 @@ } static void image_transform_png_set_strip_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { if (that->bit_depth == 16) { that->sample_depth = that->bit_depth = 8; @@ -6165,9 +6375,10 @@ } static void image_transform_png_set_strip_alpha_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) that->colour_type = PNG_COLOR_TYPE_GRAY; else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) @@ -6497,9 +6708,10 @@ } static void image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { if ((that->colour_type & PNG_COLOR_MASK_COLOR) != 0) { double gray, err; @@ -6748,9 +6960,10 @@ } static void image_transform_png_set_background_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { /* Check for tRNS first: */ if (that->have_tRNS && that->colour_type != PNG_COLOR_TYPE_PALETTE) image_pixel_add_alpha(that, &display->this); @@ -6998,9 +7211,10 @@ } static void image_transform_png_set_@_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) + image_pixel *that, png_const_structp pp, + PNG_CONST transform_display *display) { this->next->mod(this->next, that, pp, display); } @@ -7301,9 +7515,9 @@ * information required to validate the values. */ typedef struct validate_info { - png_structp pp; + png_const_structp pp; gamma_display *dp; png_byte sbit; int use_input_precision; int do_background; @@ -7331,9 +7545,9 @@ } validate_info; static void -init_validate_info(validate_info *vi, gamma_display *dp, png_struct *pp, +init_validate_info(validate_info *vi, gamma_display *dp, png_const_structp pp, int in_depth, int out_depth) { PNG_CONST unsigned int outmax = (1U<this.ps; PNG_CONST png_byte in_ct = dp->this.colour_type; @@ -8223,9 +8438,10 @@ { char msg[64]; /* No transform is expected on the threshold tests. */ - sprintf(msg, "gamma: below threshold row %d changed", y); + sprintf(msg, "gamma: below threshold row %lu changed", + (unsigned long)y); png_error(pp, msg); } } /* row (y) loop */ @@ -8233,10 +8449,11 @@ dp->this.ps->validated = 1; } static void -gamma_end(png_structp pp, png_infop pi) +gamma_end(png_structp ppIn, png_infop pi) { + png_const_structp pp = ppIn; gamma_display *dp = voidcast(gamma_display*, png_get_progressive_ptr(pp)); if (!dp->this.speed) gamma_image_validate(dp, pp, pi); @@ -9370,9 +9587,9 @@ exit(1); } /* main program */ -int main(int argc, PNG_CONST char **argv) +int main(int argc, char **argv) { volatile int summary = 1; /* Print the error summary at the end */ volatile int memstats = 0; /* Print memory statistics at the end */ diff -ru4NwbB libpng-1.5.10/contrib/libtests/tarith.c libpng-1.6.0beta22/contrib/libtests/tarith.c --- libpng-1.5.10/contrib/libtests/tarith.c 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/libtests/tarith.c 2012-05-23 12:30:58.887873077 -0500 @@ -0,0 +1,999 @@ + +/* tarith.c + * + * Copyright (c) 2011,2012 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Test internal arithmetic functions of libpng. + * + * This code must be linked against a math library (-lm), but does not require + * libpng or zlib to work. Because it includes the complete source of 'png.c' + * it tests the code with whatever compiler options are used to build it. + * Changing these options can substantially change the errors in the + * calculations that the compiler chooses! + */ +#define _POSIX_SOURCE 1 +#define _ISOC99_SOURCE 1 + +/* Obtain a copy of the code to be tested (plus other things), disabling + * stuff that is not required. + */ +#include +#include +#include +#include +#include + +#include "../../pngpriv.h" + +#define png_error png_warning + +void png_warning(png_const_structrp png_ptr, png_const_charp msg) +{ + fprintf(stderr, "validation: %s\n", msg); +} + +#define png_fixed_error png_fixed_warning + +void png_fixed_warning(png_const_structrp png_ptr, png_const_charp msg) +{ + fprintf(stderr, "overflow in: %s\n", msg); +} + +#define png_set_error_fn(pp, ep, efp, wfp) ((void)0) +#define png_malloc(pp, s) malloc(s) +#define png_malloc_warn(pp, s) malloc(s) +#define png_malloc_base(pp, s) malloc(s) +#define png_calloc(pp, s) calloc(1, (s)) +#define png_free(pp, s) free(s) + +#define png_safecat(b, sb, pos, str) (pos) +#define png_format_number(start, end, format, number) (start) + +#define crc32(crc, pp, s) (crc) +#define inflateReset(zs) Z_OK + +#define png_create_struct(type) (0) +#define png_destroy_struct(pp) ((void)0) +#define png_create_struct_2(type, m, mm) (0) +#define png_destroy_struct_2(pp, f, mm) ((void)0) + +#undef PNG_SIMPLIFIED_READ_SUPPORTED +#undef PNG_SIMPLIFIED_WRITE_SUPPORTED +#undef PNG_USER_MEM_SUPPORTED + +#include "../../png.c" + +/* Validate ASCII to fp routines. */ +static int verbose = 0; + +int validation_ascii_to_fp(int count, int argc, char **argv) +{ + int showall = 0; + double max_error=2; /* As a percentage error-in-last-digit/.5 */ + double max_error_abs=17; /* Used when precision is DBL_DIG */ + double max = 0; + double max_abs = 0; + double test = 0; /* Important to test this. */ + int precision = 5; + int nonfinite = 0; + int finite = 0; + int ok = 0; + int failcount = 0; + int minorarith = 0; + + while (--argc > 0) + if (strcmp(*++argv, "-a") == 0) + showall = 1; + else if (strcmp(*argv, "-e") == 0 && argc > 0) + { + --argc; + max_error = atof(*++argv); + } + else if (strcmp(*argv, "-E") == 0 && argc > 0) + { + --argc; + max_error_abs = atof(*++argv); + } + else + { + fprintf(stderr, "unknown argument %s\n", *argv); + return 1; + } + + do + { + png_size_t index; + int state, failed = 0; + char buffer[64]; + + if (isfinite(test)) + ++finite; + else + ++nonfinite; + + if (verbose) + fprintf(stderr, "%.*g %d\n", DBL_DIG, test, precision); + + /* Check for overflow in the buffer by setting a marker. */ + memset(buffer, 71, sizeof buffer); + + png_ascii_from_fp(0, buffer, precision+10, test, precision); + + /* Allow for a three digit exponent, this stuff will fail if + * the exponent is bigger than this! + */ + if (buffer[precision+7] != 71) + { + fprintf(stderr, "%g[%d] -> '%s'[%lu] buffer overflow\n", test, + precision, buffer, (unsigned long)strlen(buffer)); + failed = 1; + } + + /* Following are used for the number parser below and must be + * initialized to zero. + */ + state = 0; + index = 0; + if (!isfinite(test)) + { + /* Expect 'inf' */ + if (test >= 0 && strcmp(buffer, "inf") || + test < 0 && strcmp(buffer, "-inf")) + { + fprintf(stderr, "%g[%d] -> '%s' but expected 'inf'\n", test, + precision, buffer); + failed = 1; + } + } + else if (!png_check_fp_number(buffer, precision+10, &state, &index) || + buffer[index] != 0) + { + fprintf(stderr, "%g[%d] -> '%s' but has bad format ('%c')\n", test, + precision, buffer, buffer[index]); + failed = 1; + } + else if (PNG_FP_IS_NEGATIVE(state) && !(test < 0)) + { + fprintf(stderr, "%g[%d] -> '%s' but negative value not so reported\n", + test, precision, buffer); + failed = 1; + assert(!PNG_FP_IS_ZERO(state)); + assert(!PNG_FP_IS_POSITIVE(state)); + } + else if (PNG_FP_IS_ZERO(state) && !(test == 0)) + { + fprintf(stderr, "%g[%d] -> '%s' but zero value not so reported\n", + test, precision, buffer); + failed = 1; + assert(!PNG_FP_IS_NEGATIVE(state)); + assert(!PNG_FP_IS_POSITIVE(state)); + } + else if (PNG_FP_IS_POSITIVE(state) && !(test > 0)) + { + fprintf(stderr, "%g[%d] -> '%s' but postive value not so reported\n", + test, precision, buffer); + failed = 1; + assert(!PNG_FP_IS_NEGATIVE(state)); + assert(!PNG_FP_IS_ZERO(state)); + } + else + { + /* Check the result against the original. */ + double out = atof(buffer); + double change = fabs((out - test)/test); + double allow = .5/pow(10, + (precision >= DBL_DIG) ? DBL_DIG-1 : precision-1); + + /* NOTE: if you hit this error case are you compiling with gcc + * and -O0? Try -O2 - the errors can accumulate if the FP + * code above is not optimized and may drift outside the .5 in + * DBL_DIG allowed. In any case a small number of errors may + * occur (very small ones - 1 or 2%) because of rounding in the + * calculations, either in the convertion API or in atof. + */ + if (change >= allow && (isfinite(out) || + fabs(test/DBL_MAX) <= 1-allow)) + { + double percent = (precision >= DBL_DIG) ? max_error_abs : max_error; + double allowp = (change-allow)*100/allow; + + if (precision >= DBL_DIG) + { + if (max_abs < allowp) max_abs = allowp; + } + + else + { + if (max < allowp) max = allowp; + } + + if (showall || allowp >= percent) + { + fprintf(stderr, + "%.*g[%d] -> '%s' -> %.*g number changed (%g > %g (%d%%))\n", + DBL_DIG, test, precision, buffer, DBL_DIG, out, change, allow, + (int)round(allowp)); + failed = 1; + } + else + ++minorarith; + } + } + + if (failed) + ++failcount; + else + ++ok; + +skip: + /* Generate a new number and precision. */ + precision = rand(); + if (precision & 1) test = -test; + precision >>= 1; + + /* Generate random numbers. */ + if (test == 0 || !isfinite(test)) + test = precision+1; + else + { + /* Derive the exponent from the previous rand() value. */ + int exponent = precision % (DBL_MAX_EXP - DBL_MIN_EXP) + DBL_MIN_EXP; + int tmp; + test = frexp(test * rand(), &tmp); + test = ldexp(test, exponent); + precision >>= 8; /* arbitrary */ + } + + /* This limits the precision to 32 digits, enough for standard + * IEEE implementations which have at most 15 digits. + */ + precision = (precision & 0x1f) + 1; + } + while (--count); + + printf("Tested %d finite values, %d non-finite, %d OK (%d failed) %d minor " + "arithmetic errors\n", finite, nonfinite, ok, failcount, minorarith); + printf(" Error with >=%d digit precision %.2f%%\n", DBL_DIG, max_abs); + printf(" Error with < %d digit precision %.2f%%\n", DBL_DIG, max); + + return 0; +} + +/* Observe that valid FP numbers have the forms listed in the PNG extensions + * specification: + * + * [+,-]{integer,integer.fraction,.fraction}[{e,E}[+,-]integer] + * + * Test each of these in turn, including invalid cases. + */ +typedef enum checkfp_state +{ + start, fraction, exponent, states +} checkfp_state; + +/* The characters (other than digits) that characterize the states: */ +static const char none[] = ""; +static const char hexdigits[16] = "0123456789ABCDEF"; + +static const struct +{ + const char *start; /* Characters valid at the start */ + const char *end; /* Valid characters that end the state */ + const char *tests; /* Characters to test after 2 digits seen */ +} +state_characters[states] = +{ + /* start: */ { "+-.", ".eE", "+-.e*0369" }, + /* fraction: */ { none, "eE", "+-.E#0147" }, + /* exponent: */ { "+-", none, "+-.eE^0258" } +}; + +typedef struct +{ + char number[1024]; /* Buffer for number being tested */ + int limit; /* Command line limit */ + int verbose; /* Shadows global variable */ + int ctimes; /* Number of numbers tested */ + int cmillions; /* Count of millions of numbers */ + int cinvalid; /* Invalid strings checked */ + int cnoaccept; /* Characters not accepted */ +} +checkfp_command; + +typedef struct +{ + int cnumber; /* Index into number string */ + checkfp_state check_state; /* Current number state */ + int at_start; /* At start (first character) of state */ + int cdigits_in_state; /* Digits seen in that state */ + int limit; /* Limit on same for checking all chars */ + int state; /* Current parser state */ + int is_negative; /* Number is negative */ + int is_zero; /* Number is (still) zero */ + int number_was_valid; /* Previous character validity */ +} +checkfp_control; + +static int check_all_characters(checkfp_command *co, checkfp_control c); + +static int check_some_characters(checkfp_command *co, checkfp_control c, + const char *tests); + +static int check_one_character(checkfp_command *co, checkfp_control c, int ch) +{ + /* Test this character (ch) to ensure the parser does the correct thing. + */ + png_size_t index = 0; + const char test = (char)ch; + const int number_is_valid = png_check_fp_number(&test, 1, &c.state, &index); + const int character_accepted = (index == 1); + + if (c.check_state != exponent && isdigit(ch) && ch != '0') + c.is_zero = 0; + + if (c.check_state == start && c.at_start && ch == '-') + c.is_negative = 1; + + if (isprint(ch)) + co->number[c.cnumber++] = (char)ch; + else + { + co->number[c.cnumber++] = '<'; + co->number[c.cnumber++] = hexdigits[(ch >> 4) & 0xf]; + co->number[c.cnumber++] = hexdigits[ch & 0xf]; + co->number[c.cnumber++] = '>'; + } + co->number[c.cnumber] = 0; + + if (co->verbose > 1) + fprintf(stderr, "%s\n", co->number); + + if (++(co->ctimes) == 1000000) + { + if (co->verbose == 1) + fputc('.', stderr); + co->ctimes = 0; + ++(co->cmillions); + } + + if (!number_is_valid) + ++(co->cinvalid); + + if (!character_accepted) + ++(co->cnoaccept); + + /* This should never fail (it's a serious bug if it does): */ + if (index != 0 && index != 1) + { + fprintf(stderr, "%s: read beyond end of string (%lu)\n", co->number, + (unsigned long)index); + return 0; + } + + /* Validate the new state, note that the PNG_FP_IS_ macros all return + * false unless the number is valid. + */ + if (PNG_FP_IS_NEGATIVE(c.state) != + (number_is_valid && !c.is_zero && c.is_negative)) + { + fprintf(stderr, "%s: negative when it is not\n", co->number); + return 0; + } + + if (PNG_FP_IS_ZERO(c.state) != (number_is_valid && c.is_zero)) + { + fprintf(stderr, "%s: zero when it is not\n", co->number); + return 0; + } + + if (PNG_FP_IS_POSITIVE(c.state) != + (number_is_valid && !c.is_zero && !c.is_negative)) + { + fprintf(stderr, "%s: positive when it is not\n", co->number); + return 0; + } + + /* Testing a digit */ + if (isdigit(ch)) + { + if (!character_accepted) + { + fprintf(stderr, "%s: digit '%c' not accepted\n", co->number, ch); + return 0; + } + + if (!number_is_valid) + { + fprintf(stderr, "%s: saw a digit (%c) but number not valid\n", + co->number, ch); + return 0; + } + + ++c.cdigits_in_state; + c.at_start = 0; + c.number_was_valid = 1; + + /* Continue testing characters in this state. Either test all of + * them or, if we have already seen one digit in this state, just test a + * limited set. + */ + if (c.cdigits_in_state < 1) + return check_all_characters(co, c); + + else + return check_some_characters(co, c, + state_characters[c.check_state].tests); + } + + /* A non-digit; is it allowed here? */ + else if (((ch == '+' || ch == '-') && c.check_state != fraction && + c.at_start) || + (ch == '.' && c.check_state == start) || + ((ch == 'e' || ch == 'E') && c.number_was_valid && + c.check_state != exponent)) + { + if (!character_accepted) + { + fprintf(stderr, "%s: character '%c' not accepted\n", co->number, ch); + return 0; + } + + /* The number remains valid after start of fraction but nowhere else. */ + if (number_is_valid && (c.check_state != start || ch != '.')) + { + fprintf(stderr, "%s: saw a non-digit (%c) but number valid\n", + co->number, ch); + return 0; + } + + c.number_was_valid = number_is_valid; + + /* Check for a state change. When changing to 'fraction' if the number + * is valid at this point set the at_start to false to allow an exponent + * 'e' to come next. + */ + if (c.check_state == start && ch == '.') + { + c.check_state = fraction; + c.at_start = !number_is_valid; + c.cdigits_in_state = 0; + c.limit = co->limit; + return check_all_characters(co, c); + } + + else if (c.check_state < exponent && (ch == 'e' || ch == 'E')) + { + c.check_state = exponent; + c.at_start = 1; + c.cdigits_in_state = 0; + c.limit = co->limit; + return check_all_characters(co, c); + } + + /* Else it was a sign, and the state doesn't change. */ + else + { + if (ch != '-' && ch != '+') + { + fprintf(stderr, "checkfp: internal error (1)\n"); + return 0; + } + + c.at_start = 0; + return check_all_characters(co, c); + } + } + + /* Testing an invalid character */ + else + { + if (character_accepted) + { + fprintf(stderr, "%s: character '%c' [0x%.2x] accepted\n", co->number, + ch, ch); + return 0; + } + + if (number_is_valid != c.number_was_valid) + { + fprintf(stderr, + "%s: character '%c' [0x%.2x] changed number validity\n", co->number, + ch, ch); + return 0; + } + + /* Do nothing - the parser has stuck; return success and keep going with + * the next character. + */ + } + + /* Successful return (the caller will try the next character.) */ + return 1; +} + +static int check_all_characters(checkfp_command *co, checkfp_control c) +{ + int ch; + + if (c.cnumber+4 < sizeof co->number) for (ch=0; ch<256; ++ch) + { + if (!check_one_character(co, c, ch)) + return 0; + } + + return 1; +} + +static int check_some_characters(checkfp_command *co, checkfp_control c, + const char *tests) +{ + int i; + + --(c.limit); + + if (c.cnumber+4 < sizeof co->number && c.limit >= 0) + { + if (c.limit > 0) for (i=0; tests[i]; ++i) + { + if (!check_one_character(co, c, tests[i])) + return 0; + } + + /* At the end check all the characters. */ + else + return check_all_characters(co, c); + } + + return 1; +} + +int validation_checkfp(int count, int argc, char **argv) +{ + int result; + checkfp_command command; + checkfp_control control; + + command.number[0] = 0; + command.limit = 3; + command.verbose = verbose; + command.ctimes = 0; + command.cmillions = 0; + command.cinvalid = 0; + command.cnoaccept = 0; + + while (--argc > 0) + { + ++argv; + if (argc > 1 && strcmp(*argv, "-l") == 0) + { + --argc; + command.limit = atoi(*++argv); + } + + else + { + fprintf(stderr, "unknown argument %s\n", *argv); + return 1; + } + } + + control.cnumber = 0; + control.check_state = start; + control.at_start = 1; + control.cdigits_in_state = 0; + control.limit = command.limit; + control.state = 0; + control.is_negative = 0; + control.is_zero = 1; + control.number_was_valid = 0; + + result = check_all_characters(&command, control); + + printf("checkfp: %s: checked %d,%.3d,%.3d,%.3d strings (%d invalid)\n", + result ? "pass" : "FAIL", command.cmillions / 1000, + command.cmillions % 1000, command.ctimes / 1000, command.ctimes % 1000, + command.cinvalid); + + return result; +} + +int validation_muldiv(int count, int argc, char **argv) +{ + int tested = 0; + int overflow = 0; + int error = 0; + int error64 = 0; + int passed = 0; + int randbits = 0; + png_uint_32 randbuffer; + png_fixed_point a; + png_int_32 times, div; + + while (--argc > 0) + { + fprintf(stderr, "unknown argument %s\n", *++argv); + return 1; + } + + /* Find out about the random number generator. */ + randbuffer = RAND_MAX; + while (randbuffer != 0) ++randbits, randbuffer >>= 1; + printf("Using random number generator that makes %d bits\n", randbits); + for (div=0; div<32; div += randbits) + randbuffer = (randbuffer << randbits) ^ rand(); + + a = 0; + times = div = 0; + do + { + png_fixed_point result; + /* NOTE: your mileage may vary, a type is required below that can + * hold 64 bits or more, if floating point is used a 64 bit or + * better mantissa is required. + */ + long long int fp, fpround; + unsigned long hi, lo; + int ok; + + /* Check the values, png_64bit_product can only handle positive + * numbers, so correct for that here. + */ + { + long u1, u2; + int n = 0; + if (a < 0) u1 = -a, n = 1; else u1 = a; + if (times < 0) u2 = -times, n = !n; else u2 = times; + png_64bit_product(u1, u2, &hi, &lo); + if (n) + { + /* -x = ~x+1 */ + lo = ((~lo) + 1) & 0xffffffff; + hi = ~hi; + if (lo == 0) ++hi; + } + } + + fp = a; + fp *= times; + if ((fp & 0xffffffff) != lo || ((fp >> 32) & 0xffffffff) != hi) + { + fprintf(stderr, "png_64bit_product %d * %d -> %lx|%.8lx not %llx\n", + a, times, hi, lo, fp); + ++error64; + } + + if (div != 0) + { + /* Round - this is C round to zero. */ + if ((fp < 0) != (div < 0)) + fp -= div/2; + else + fp += div/2; + + fp /= div; + fpround = fp; + /* Assume 2's complement here: */ + ok = fpround <= PNG_UINT_31_MAX && + fpround >= -1-(long long int)PNG_UINT_31_MAX; + if (!ok) ++overflow; + } + else + ok = 0, ++overflow, fpround = fp/*misleading*/; + + if (verbose) + fprintf(stderr, "TEST %d * %d / %d -> %lld (%s)\n", a, times, div, + fp, ok ? "ok" : "overflow"); + + ++tested; + if (png_muldiv(&result, a, times, div) != ok) + { + ++error; + if (ok) + fprintf(stderr, "%d * %d / %d -> overflow (expected %lld)\n", a, + times, div, fp); + else + fprintf(stderr, "%d * %d / %d -> %d (expected overflow %lld)\n", a, + times, div, result, fp); + } + else if (ok && result != fpround) + { + ++error; + fprintf(stderr, "%d * %d / %d -> %d not %lld\n", a, times, div, result, + fp); + } + else + ++passed; + + /* Generate three new values, this uses rand() and rand() only returns + * up to RAND_MAX. + */ + /* CRUDE */ + a += times; + times += div; + div = randbuffer; + randbuffer = (randbuffer << randbits) ^ rand(); + } + while (--count > 0); + + printf("%d tests including %d overflows, %d passed, %d failed (%d 64 bit " + "errors)\n", tested, overflow, passed, error, error64); + return 0; +} + +/* When FP is on this just becomes a speed test - compile without FP to get real + * validation. + */ +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +#define LN2 .000010576586617430806112933839 /* log(2)/65536 */ +#define L2INV 94548.46219969910586572651 /* 65536/log(2) */ + +/* For speed testing, need the internal functions too: */ +static png_uint_32 png_log8bit(unsigned x) +{ + if (x > 0) + return (png_uint_32)floor(.5-log(x/255.)*L2INV); + + return 0xffffffff; +} + +static png_uint_32 png_log16bit(png_uint_32 x) +{ + if (x > 0) + return (png_uint_32)floor(.5-log(x/65535.)*L2INV); + + return 0xffffffff; +} + +static png_uint_32 png_exp(png_uint_32 x) +{ + return (png_uint_32)floor(.5 + exp(x * -LN2) * 0xffffffffU); +} + +static png_byte png_exp8bit(png_uint_32 log) +{ + return (png_byte)floor(.5 + exp(log * -LN2) * 255); +} + +static png_uint_16 png_exp16bit(png_uint_32 log) +{ + return (png_uint_16)floor(.5 + exp(log * -LN2) * 65535); +} +#endif /* FLOATING_ARITHMETIC */ + +int validation_gamma(int argc, char **argv) +{ + double gamma[9] = { 2.2, 1.8, 1.52, 1.45, 1., 1/1.45, 1/1.52, 1/1.8, 1/2.2 }; + double maxerr; + int i, silent=0, onlygamma=0; + + /* Silence the output with -s, just test the gamma functions with -g: */ + while (--argc > 0) + if (strcmp(*++argv, "-s") == 0) + silent = 1; + else if (strcmp(*argv, "-g") == 0) + onlygamma = 1; + else + { + fprintf(stderr, "unknown argument %s\n", *argv); + return 1; + } + + if (!onlygamma) + { + /* First validate the log functions: */ + maxerr = 0; + for (i=0; i<256; ++i) + { + double correct = -log(i/255.)/log(2.)*65536; + double error = png_log8bit(i) - correct; + + if (i != 0 && fabs(error) > maxerr) + maxerr = fabs(error); + + if (i == 0 && png_log8bit(i) != 0xffffffff || + i != 0 && png_log8bit(i) != floor(correct+.5)) + { + fprintf(stderr, "8 bit log error: %d: got %u, expected %f\n", + i, png_log8bit(i), correct); + } + } + + if (!silent) + printf("maximum 8 bit log error = %f\n", maxerr); + + maxerr = 0; + for (i=0; i<65536; ++i) + { + double correct = -log(i/65535.)/log(2.)*65536; + double error = png_log16bit(i) - correct; + + if (i != 0 && fabs(error) > maxerr) + maxerr = fabs(error); + + if (i == 0 && png_log16bit(i) != 0xffffffff || + i != 0 && png_log16bit(i) != floor(correct+.5)) + { + if (error > .68) /* By experiment error is less than .68 */ + { + fprintf(stderr, "16 bit log error: %d: got %u, expected %f" + " error: %f\n", i, png_log16bit(i), correct, error); + } + } + } + + if (!silent) + printf("maximum 16 bit log error = %f\n", maxerr); + + /* Now exponentiations. */ + maxerr = 0; + for (i=0; i<=0xfffff; ++i) + { + double correct = exp(-i/65536. * log(2.)) * (65536. * 65536); + double error = png_exp(i) - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (fabs(error) > 1883) /* By experiment. */ + { + fprintf(stderr, "32 bit exp error: %d: got %u, expected %f" + " error: %f\n", i, png_exp(i), correct, error); + } + } + + if (!silent) + printf("maximum 32 bit exp error = %f\n", maxerr); + + maxerr = 0; + for (i=0; i<=0xfffff; ++i) + { + double correct = exp(-i/65536. * log(2.)) * 255; + double error = png_exp8bit(i) - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (fabs(error) > .50002) /* By experiment */ + { + fprintf(stderr, "8 bit exp error: %d: got %u, expected %f" + " error: %f\n", i, png_exp8bit(i), correct, error); + } + } + + if (!silent) + printf("maximum 8 bit exp error = %f\n", maxerr); + + maxerr = 0; + for (i=0; i<=0xfffff; ++i) + { + double correct = exp(-i/65536. * log(2.)) * 65535; + double error = png_exp16bit(i) - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (fabs(error) > .524) /* By experiment */ + { + fprintf(stderr, "16 bit exp error: %d: got %u, expected %f" + " error: %f\n", i, png_exp16bit(i), correct, error); + } + } + + if (!silent) + printf("maximum 16 bit exp error = %f\n", maxerr); + } /* !onlygamma */ + + /* Test the overall gamma correction. */ + for (i=0; i<9; ++i) + { + unsigned j; + double g = gamma[i]; + png_fixed_point gfp = floor(g * PNG_FP_1 + .5); + + if (!silent) + printf("Test gamma %f\n", g); + + maxerr = 0; + for (j=0; j<256; ++j) + { + double correct = pow(j/255., g) * 255; + png_byte out = png_gamma_8bit_correct(j, gfp); + double error = out - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (out != floor(correct+.5)) + { + fprintf(stderr, "8bit %d ^ %f: got %d expected %f error %f\n", + j, g, out, correct, error); + } + } + + if (!silent) + printf("gamma %f: maximum 8 bit error %f\n", g, maxerr); + + maxerr = 0; + for (j=0; j<65536; ++j) + { + double correct = pow(j/65535., g) * 65535; + png_uint_16 out = png_gamma_16bit_correct(j, gfp); + double error = out - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (fabs(error) > 1.62) + { + fprintf(stderr, "16bit %d ^ %f: got %d expected %f error %f\n", + j, g, out, correct, error); + } + } + + if (!silent) + printf("gamma %f: maximum 16 bit error %f\n", g, maxerr); + } + + return 0; +} + +/**************************** VALIDATION TESTS ********************************/ +/* Various validation routines are included herein, they require some + * definition for png_warning and png_error, seetings of VALIDATION: + * + * 1: validates the ASCII to floating point convertions + * 2: validates png_muldiv + * 3: accuracy test of fixed point gamma tables + */ + +/* The following COUNT (10^8) takes about 1 hour on a 1GHz Pentium IV + * processor. + */ +#define COUNT 1000000000 + +int main(int argc, char **argv) +{ + int count = COUNT; + + while (argc > 1) + { + if (argc > 2 && strcmp(argv[1], "-c") == 0) + { + count = atoi(argv[2]); + argc -= 2; + argv += 2; + } + + else if (strcmp(argv[1], "-v") == 0) + { + ++verbose; + --argc; + ++argv; + } + + else + break; + } + + if (count > 0 && argc > 1) + { + if (strcmp(argv[1], "ascii") == 0) + return validation_ascii_to_fp(count, argc-1, argv+1); + else if (strcmp(argv[1], "checkfp") == 0) + return validation_checkfp(count, argc-1, argv+1); + else if (strcmp(argv[1], "muldiv") == 0) + return validation_muldiv(count, argc-1, argv+1); + else if (strcmp(argv[1], "gamma") == 0) + return validation_gamma(argc-1, argv+1); + } + + /* Bad argument: */ + fprintf(stderr, + "usage: tarith [-v] [-c count] {ascii,muldiv,gamma} [args]\n"); + fprintf(stderr, " arguments: ascii [-a (all results)] [-e error%%]\n"); + fprintf(stderr, " checkfp [-l max-number-chars]\n"); + fprintf(stderr, " muldiv\n"); + fprintf(stderr, " gamma -s (silent) -g (only gamma; no log)\n"); + return 1; +} diff -ru4NwbB libpng-1.5.10/contrib/libtests/timepng.c libpng-1.6.0beta22/contrib/libtests/timepng.c --- libpng-1.5.10/contrib/libtests/timepng.c 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/libtests/timepng.c 2012-05-23 12:30:58.900173393 -0500 @@ -0,0 +1,303 @@ +/* timepng.c + * + * Copyright (c) 2012 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Load an arbitrary number of PNG files (from the command line, or, if there + * are no arguments on the command line, from stdin) then run a time test by + * reading each file by row. The test does nothing with the read result and + * does no transforms. The only output is a time as a floating point number of + * seconds with 9 decimal digits. + */ +#define _POSIX_C_SOURCE 199309L /* for clock_gettime */ + +#include +#include +#include + +#include + +#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +static int read_png(FILE *fp) +{ + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); + png_infop info_ptr = NULL; + png_bytep row = NULL, display = NULL; + + if (png_ptr == NULL) + return 0; + + if (setjmp(png_jmpbuf(png_ptr))) + { + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + if (row != NULL) free(row); + if (display != NULL) free(display); + return 0; + } + + png_init_io(png_ptr, fp); + + info_ptr = png_create_info_struct(png_ptr); + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + png_read_info(png_ptr, info_ptr); + + { + png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); + + row = malloc(rowbytes); + display = malloc(rowbytes); + + if (row == NULL || display == NULL) + png_error(png_ptr, "OOM allocating row buffers"); + + { + png_uint_32 height = png_get_image_height(png_ptr, info_ptr); + int passes = png_set_interlace_handling(png_ptr); + int pass; + + png_start_read_image(png_ptr); + + for (pass = 0; pass < passes; ++pass) + { + png_uint_32 y = height; + + /* NOTE: this trashes the row each time; interlace handling won't + * work, but this avoids memory thrashing for speed testing. + */ + while (y-- > 0) + png_read_row(png_ptr, row, display); + } + } + } + + /* Make sure to read to the end of the file: */ + png_read_end(png_ptr, info_ptr); + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + free(row); + free(display); + return 1; +} + +static int mytime(struct timespec *t) +{ + /* Do the timing using clock_gettime and the per-process timer. */ + if (!clock_gettime(CLOCK_PROCESS_CPUTIME_ID, t)) + return 1; + + perror("CLOCK_PROCESS_CPUTIME_ID"); + fprintf(stderr, "timepng: could not get the time\n"); + return 0; +} + +static int perform_one_test(FILE *fp, int nfiles) +{ + int i; + struct timespec before, after; + + /* Clear out all errors: */ + rewind(fp); + + if (mytime(&before)) + { + for (i=0; i 1) + { + int i; + + for (i=1; i 0) + ok = perform_one_test(fp, nfiles); + + else + fprintf(stderr, "usage: timepng {files} or ls files | timepng\n"); + } + + (void)fclose(fp); + } + + else + fprintf(stderr, "timepng: could not open temporary file\n"); + + /* Exit code 0 on success. */ + return ok == 0; +} diff -ru4NwbB libpng-1.5.10/contrib/pngminim/decoder/pngusr.dfa libpng-1.6.0beta22/contrib/pngminim/decoder/pngusr.dfa --- libpng-1.5.10/contrib/pngminim/decoder/pngusr.dfa 2012-03-29 00:06:55.432038581 -0500 +++ libpng-1.6.0beta22/contrib/pngminim/decoder/pngusr.dfa 2012-05-23 12:30:56.921797967 -0500 @@ -36,4 +36,5 @@ option SETJMP on option STDIO on option READ_EXPAND on option READ_STRIP_16_TO_8 on +option USER_LIMITS on diff -ru4NwbB libpng-1.5.10/contrib/pngminus/makefile.std libpng-1.6.0beta22/contrib/pngminus/makefile.std --- libpng-1.5.10/contrib/pngminus/makefile.std 2012-03-29 00:06:55.062297577 -0500 +++ libpng-1.6.0beta22/contrib/pngminus/makefile.std 2012-05-23 12:30:56.601541915 -0500 @@ -7,11 +7,11 @@ RM=rm -f #PNGPATH = /usr/local -#PNGINC = -I$(PNGPATH)/include/libpng15 -#PNGLIB = -L$(PNGPATH)/lib -lpng15 -#PNGLIBS = $(PNGPATH)/lib/libpng15.a +#PNGINC = -I$(PNGPATH)/include/libpng16 +#PNGLIB = -L$(PNGPATH)/lib -lpng16 +#PNGLIBS = $(PNGPATH)/lib/libpng16.a PNGINC = -I../.. PNGLIB = -L../.. -lpng PNGLIBS = ../../libpng.a diff -ru4NwbB libpng-1.5.10/contrib/pngminus/png2pnm.c libpng-1.6.0beta22/contrib/pngminus/png2pnm.c --- libpng-1.5.10/contrib/pngminus/png2pnm.c 2012-03-29 00:06:55.102597785 -0500 +++ libpng-1.6.0beta22/contrib/pngminus/png2pnm.c 2012-05-23 12:30:56.638657237 -0500 @@ -17,8 +17,9 @@ #ifdef __TURBOC__ #include #include #endif +#include #ifndef BOOL #define BOOL unsigned char #endif diff -ru4NwbB libpng-1.5.10/contrib/pngminus/pnm2png.c libpng-1.6.0beta22/contrib/pngminus/pnm2png.c --- libpng-1.5.10/contrib/pngminus/pnm2png.c 2012-03-29 00:06:55.150376783 -0500 +++ libpng-1.6.0beta22/contrib/pngminus/pnm2png.c 2012-05-23 12:30:56.684152614 -0500 @@ -17,8 +17,9 @@ #ifdef __TURBOC__ #include #include #endif +#include #ifndef BOOL #define BOOL unsigned char #endif @@ -196,8 +197,11 @@ char width_token[16]; char height_token[16]; char maxval_token[16]; int color_type; + unsigned long ul_width, ul_alpha_width; + unsigned long ul_height, ul_alpha_height; + unsigned long ul_maxval; png_uint_32 width, alpha_width; png_uint_32 height, alpha_height; png_uint_32 maxval; int bit_depth = 0; @@ -226,13 +230,17 @@ { raw = (type_token[1] == '5'); color_type = PNG_COLOR_TYPE_GRAY; get_token(pnm_file, width_token); - sscanf (width_token, "%lu", &width); + sscanf (width_token, "%lu", &ul_width); + width = (png_uint_32) ul_width; get_token(pnm_file, height_token); - sscanf (height_token, "%lu", &height); + sscanf (height_token, "%lu", &ul_height); + height = (png_uint_32) ul_height; get_token(pnm_file, maxval_token); - sscanf (maxval_token, "%lu", &maxval); + sscanf (maxval_token, "%lu", &ul_maxval); + maxval = (png_uint_32) ul_maxval; + if (maxval <= 1) bit_depth = 1; else if (maxval <= 3) bit_depth = 2; @@ -247,13 +255,16 @@ { raw = (type_token[1] == '6'); color_type = PNG_COLOR_TYPE_RGB; get_token(pnm_file, width_token); - sscanf (width_token, "%lu", &width); + sscanf (width_token, "%lu", &ul_width); + width = (png_uint_32) ul_width; get_token(pnm_file, height_token); - sscanf (height_token, "%lu", &height); + sscanf (height_token, "%lu", &ul_height); + height = (png_uint_32) ul_height; get_token(pnm_file, maxval_token); - sscanf (maxval_token, "%lu", &maxval); + sscanf (maxval_token, "%lu", &ul_maxval); + maxval = (png_uint_32) ul_maxval; if (maxval <= 1) bit_depth = 1; else if (maxval <= 3) bit_depth = 2; @@ -286,17 +297,20 @@ else if ((type_token[1] == '2') || (type_token[1] == '5')) { alpha_raw = (type_token[1] == '5'); get_token(alpha_file, width_token); - sscanf (width_token, "%lu", &alpha_width); + sscanf (width_token, "%lu", &ul_alpha_width); + alpha_width=(png_uint_32) ul_alpha_width; if (alpha_width != width) return FALSE; get_token(alpha_file, height_token); - sscanf (height_token, "%lu", &alpha_height); + sscanf (height_token, "%lu", &ul_alpha_height); + alpha_height = (png_uint_32) ul_alpha_height; if (alpha_height != height) return FALSE; get_token(alpha_file, maxval_token); - sscanf (maxval_token, "%lu", &maxval); + sscanf (maxval_token, "%lu", &ul_maxval); + maxval = (png_uint_32) ul_maxval; if (maxval <= 1) alpha_depth = 1; else if (maxval <= 3) alpha_depth = 2; @@ -509,17 +523,19 @@ png_uint_32 get_value (FILE *pnm_file, int depth) { static png_uint_32 mask = 0; png_byte token[16]; + unsigned long ul_ret_value; png_uint_32 ret_value; int i = 0; if (mask == 0) for (i = 0; i < depth; i++) mask = (mask << 1) | 0x01; get_token (pnm_file, (char *) token); - sscanf ((const char *) token, "%lu", &ret_value); + sscanf ((const char *) token, "%lu", &ul_ret_value); + ret_value = (png_uint_32) ul_ret_value; ret_value &= mask; if (depth < 8) diff -ru4NwbB libpng-1.5.10/contrib/tools/README.txt libpng-1.6.0beta22/contrib/tools/README.txt --- libpng-1.5.10/contrib/tools/README.txt 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/tools/README.txt 2012-05-23 12:30:58.913089755 -0500 @@ -0,0 +1,26 @@ +This directory (contrib/tools) contains tools used by the authors of libpng. + +Code and data placed in this directory is not required to build libpng, +however the code in this directory has been used to generate data or code in +the body of the libpng source. The source code identifies where this has +been done. Code in this directory may not compile on all operating systems +that libpng supports. + +NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY. + +To the extent possible under law, the authors have waived all copyright and +related or neighboring rights to this work. This work is published from: +United States. + +The files may be used freely in any way. + +The source code and comments in this directory are the original work of the +people named below. No other person or organization has made contributions to +the work in this directory. + +ORIGINAL AUTHORS + The following people have contributed to the code in this directory. None + of the people below claim any rights with regard to the contents of this + directory. + + John Bowler diff -ru4NwbB libpng-1.5.10/contrib/tools/checksum-icc.c libpng-1.6.0beta22/contrib/tools/checksum-icc.c --- libpng-1.5.10/contrib/tools/checksum-icc.c 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/tools/checksum-icc.c 2012-05-23 12:30:58.925787518 -0500 @@ -0,0 +1,102 @@ +/* checksum-icc.c + * + * Copyright (c) 2012 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Generate crc32 and adler32 checksums of the given input files, used to + * generate check-codes for use when matching ICC profiles within libpng. + */ +#include + +#include + +static int +read_one_file(FILE *ip, const char *name) +{ + uLong length = 0; + uLong a32 = adler32(0, NULL, 0); + uLong c32 = crc32(0, NULL, 0); + Byte header[132]; + + for (;;) + { + int ch = getc(ip); + Byte b; + + if (ch == EOF) break; + + b = (Byte)ch; + + if (length < sizeof header) + header[length] = b; + + ++length; + a32 = adler32(a32, &b, 1); + c32 = crc32(c32, &b, 1); + } + + if (ferror(ip)) + return 0; + + /* Success */ + printf("PNG_ICC_CHECKSUM(0x%8.8lx, 0x%8.8lx,\n PNG_MD5(" + "0x%2.2x%2.2x%2.2x%2.2x, 0x%2.2x%2.2x%2.2x%2.2x, 0x%2.2x%2.2x%2.2x%2.2x," + " 0x%2.2x%2.2x%2.2x%2.2x), %d,\n" + " \"%4.4d/%2.2d/%2.2d %2.2d:%2.2d:%2.2d\", %lu, \"%s\")\n", + (unsigned long)a32, (unsigned long)c32, + header[84], header[85], header[86], header[87], + header[88], header[89], header[90], header[91], + header[92], header[93], header[94], header[95], + header[96], header[97], header[98], header[99], +# define u16(x) (header[x] * 256 + header[x+1]) +# define u32(x) (u16(x) * 65536 + u16(x+2)) + u32(64), u16(24), u16(26), u16(28), u16(30), u16(32), u16(34), + (unsigned long)length, name); + + return 1; +} + +int main(int argc, char **argv) +{ + int err = 0; + + printf("/* adler32, crc32, MD5[16], intent, date, length, file-name */\n"); + + if (argc > 1) + { + int i; + + for (i=1; i + +#include + +static int +read_one_file(FILE *ip, const char *name) +{ + uLong length = 0; + uLong a32 = adler32(0, NULL, 0); + uLong c32 = crc32(0, NULL, 0); + Byte header[132]; + + for (;;) + { + int ch = getc(ip); + Byte b; + + if (ch == EOF) break; + + b = (Byte)ch; + + if (length < sizeof header) + header[length] = b; + + ++length; + a32 = adler32(a32, &b, 1); + c32 = crc32(c32, &b, 1); + } + + if (ferror(ip)) + return 0; + + /* Success */ + printf("{ 0x%8.8lx, 0x%8.8lx, " + "0x%2.2x%2.2x%2.2x%2.2x, 0x%2.2x%2.2x%2.2x%2.2x, " + "0x%2.2x%2.2x%2.2x%2.2x, 0x%2.2x%2.2x%2.2x%2.2x,\n" + " \"%4.4d/%2.2d/%2.2d %2.2d:%2.2d:%2.2d\", %lu, \"%s\" },\n", + (unsigned long)a32, (unsigned long)c32, + header[84], header[85], header[86], header[87], + header[88], header[89], header[90], header[91], + header[92], header[93], header[94], header[95], + header[96], header[97], header[98], header[99], +# define u16(x) (header[x] * 256 + header[x+1]) + u16(24), u16(26), u16(28), u16(30), u16(32), u16(34), + (unsigned long)length, name); + + return 1; +} + +int main(int argc, char **argv) +{ + int err = 0; + + printf("= {\n/* adler32 crc32 MD5\n" + " date length name */\n"); + + if (argc > 1) + { + int i; + + for (i=1; i +#include +#include +#include + +#include + +#include "sRGB.h" + +static void +usage(const char *prog) +{ + fprintf(stderr, + "%s: usage: %s [-linear|-sRGB] [-gray|-color] component{1,4}\n", + prog, prog); + exit(1); +} + +unsigned long +component(const char *prog, const char *arg, int issRGB) +{ + char *ep; + unsigned long c = strtoul(arg, &ep, 0); + + if (ep <= arg || *ep || c > 65535 || (issRGB && c > 255)) + { + fprintf(stderr, "%s: %s: invalid component value (%lu)\n", prog, arg, c); + usage(prog); + } + + return c; +} + +int +main(int argc, const char **argv) +{ + const char *prog = *argv++; + int to_linear = 0, to_gray = 0, to_color = 0; + int channels = 0; + double c[4]; + + /* FE_TONEAREST is the IEEE754 round to nearest, preferring even, mode; i.e. + * everything rounds to the nearest value except that '.5' rounds to the + * nearest even value. + */ + fesetround(FE_TONEAREST); + + c[3] = c[2] = c[1] = c[0] = 0; + + while (--argc > 0 && **argv == '-') + { + const char *arg = 1+*argv++; + + if (strcmp(arg, "sRGB") == 0) + to_linear = 0; + + else if (strcmp(arg, "linear") == 0) + to_linear = 1; + + else if (strcmp(arg, "gray") == 0) + to_gray = 1, to_color = 0; + + else if (strcmp(arg, "color") == 0) + to_gray = 0, to_color = 1; + + else + usage(prog); + } + + switch (argc) + { + default: + usage(prog); + break; + + case 4: + c[3] = component(prog, argv[3], to_linear); + ++channels; + case 3: + c[2] = component(prog, argv[2], to_linear); + ++channels; + case 2: + c[1] = component(prog, argv[1], to_linear); + ++channels; + case 1: + c[0] = component(prog, argv[0], to_linear); + ++channels; + break; + } + + if (to_linear) + { + int i; + int components = channels; + + if ((components & 1) == 0) + --components; + + for (i=0; i 0) + for (i=0; i 2) + { + fprintf(stderr, "%s: too many channels (%d) for -color\n", + prog, channels); + usage(prog); + } + + c[3] = c[1]; /* alpha, if present */ + c[2] = c[1] = c[0]; + } + + if (to_linear) + { + int i; + if ((channels & 1) == 0) + { + double alpha = c[channels-1]; + for (i=0; i= 0) + c[i] = sRGB_from_linear(c[i]); + + for (i=0; i= 80) { + print str "," + str = " " $0 "U" + } else + str = t + } + END{ + print str + }' +} +# +# The logarithm table. +cat <= 2^32) x = 2^32-1; + x; +} +END +echo '};' +echo +# +# And the table of adjustment values. +cat <=0;--i){ + (1 - e(-(2^i)/65536*l(2))) * 2^(32-i) +} +END +echo '#endif' diff -ru4NwbB libpng-1.5.10/contrib/tools/makesRGB.c libpng-1.6.0beta22/contrib/tools/makesRGB.c --- libpng-1.5.10/contrib/tools/makesRGB.c 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/tools/makesRGB.c 2012-05-23 12:30:58.972227966 -0500 @@ -0,0 +1,430 @@ +/* makesRGB.c -- build sRGB-to-linear and linear-to-sRGB conversion tables + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * COPYRIGHT: Written by John Cunningham Bowler, 2012. + * To the extent possible under law, the author has waived all copyright and + * related or neighboring rights to this work. This work is published from: + * United States. + * + * Make a table to convert 8-bit sRGB encoding values into the closest 16-bit + * linear value. + * + * Make two tables to take a linear value scaled to 255*65535 and return an + * approximation to the 8-bit sRGB encoded value. Calculate the error in these + * tables and display it. + */ +#define _C99_SOURCE 1 +#include +#include +#include + +/* pngpriv.h includes the definition of 'PNG_sRGB_FROM_LINEAR' which is required + * to verify the actual code. + */ +#include "../../pngpriv.h" + +#include "sRGB.h" + +/* The tables are declared 'const' in pngpriv.h, so this redefines the tables to + * be used. + */ +#define png_sRGB_table sRGB_table +#define png_sRGB_base sRGB_base +#define png_sRGB_delta sRGB_delta + +static png_uint_16 png_sRGB_table[256]; +static png_uint_16 png_sRGB_base[512]; +static png_byte png_sRGB_delta[512]; + +static const unsigned int max_input = 255*65535; + +double +fsRGB(double l) +{ + return sRGB_from_linear(l/max_input); +} + +double +sRGB(unsigned int i) +{ + return fsRGB(i); +} + +double +finvsRGB(unsigned int i) +{ + return 65535 * linear_from_sRGB(i/255.); +} + +png_uint_16 +invsRGB(unsigned int i) +{ + unsigned int x = nearbyint(finvsRGB(i)); + + if (x > 65535) + { + fprintf(stderr, "invsRGB(%u) overflows to %u\n", i, x); + exit(1); + } + + return (png_uint_16)x; +} + +int +main(int argc, char **argv) +{ + unsigned int i, i16, ibase; + double min_error = 0; + double max_error = 0; + double min_error16 = 0; + double max_error16 = 0; + double adjust; + double adjust_lo = 0.4, adjust_hi = 0.6, adjust_mid = 0.5; + unsigned int ec_lo = 0, ec_hi = 0, ec_mid = 0; + unsigned int error_count = 0; + unsigned int error_count16 = 0; + int test_only = 0; + + if (argc > 1) + test_only = strcmp("--test", argv[1]) == 0; + + /* Initialize the encoding table first. */ + for (i=0; i<256; ++i) + { + png_sRGB_table[i] = invsRGB(i); + } + + /* Now work out the decoding tables (this is where the error comes in because + * there are 512 set points and 512 straight lines between them.) + */ + for (;;) + { + if (ec_lo == 0) + adjust = adjust_lo; + + else if (ec_hi == 0) + adjust = adjust_hi; + + else if (ec_mid == 0) + adjust = adjust_mid; + + else if (ec_mid < ec_hi) + adjust = (adjust_mid + adjust_hi)/2; + + else if (ec_mid < ec_lo) + adjust = (adjust_mid + adjust_lo)/2; + + else + { + fprintf(stderr, "not reached: %u .. %u .. %u\n", ec_lo, ec_mid, ec_hi); + exit(1); + } + + /* Calculate the table using the current 'adjust' */ + for (i=0; i<=511; ++i) + { + double lo = 255 * sRGB(i << 15); + double hi = 255 * sRGB((i+1) << 15); + unsigned int calc; + + calc = nearbyint((lo+adjust) * 256); + if (calc > 65535) + { + fprintf(stderr, "table[%d][0]: overflow %08x (%d)\n", i, calc, + calc); + exit(1); + } + png_sRGB_base[i] = calc; + + calc = nearbyint((hi-lo) * 32); + if (calc > 255) + { + fprintf(stderr, "table[%d][1]: overflow %08x (%d)\n", i, calc, + calc); + exit(1); + } + png_sRGB_delta[i] = calc; + } + + /* Check the 16-bit linear values alone: */ + error_count16 = 0; + for (i16=0; i16 <= 65535; ++i16) + { + unsigned int i = 255*i16; + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (icalc != iexact) + ++error_count16; + } + + /* Now try changing the adjustment. */ + if (ec_lo == 0) + ec_lo = error_count16; + + else if (ec_hi == 0) + ec_hi = error_count16; + + else if (ec_mid == 0) + { + ec_mid = error_count16; + printf("/* initial error counts: %u .. %u .. %u */\n", ec_lo, ec_mid, + ec_hi); + } + + else if (error_count16 < ec_mid) + { + printf("/* adjust (mid ): %f: %u -> %u */\n", adjust, ec_mid, + error_count16); + ec_mid = error_count16; + adjust_mid = adjust; + } + + else if (adjust < adjust_mid && error_count16 < ec_lo) + { + printf("/* adjust (low ): %f: %u -> %u */\n", adjust, ec_lo, + error_count16); + ec_lo = error_count16; + adjust_lo = adjust; + } + + else if (adjust > adjust_mid && error_count16 < ec_hi) + { + printf("/* adjust (high): %f: %u -> %u */\n", adjust, ec_hi, + error_count16); + ec_hi = error_count16; + adjust_hi = adjust; + } + + else + { + adjust = adjust_mid; + printf("/* adjust: %f: %u */\n", adjust, ec_mid); + break; + } + } + + /* For each entry in the table try to adjust it to minimize the error count + * in that entry. Each entry corresponds to 128 input values. + */ + for (ibase=0; ibase<65536; ibase+=128) + { + png_uint_16 base = png_sRGB_base[ibase >> 7], trybase = base, ob=base; + png_byte delta = png_sRGB_delta[ibase >> 7], trydelta = delta, od=delta; + unsigned int ecbase = 0, eco; + + for (;;) + { + png_sRGB_base[ibase >> 7] = trybase; + png_sRGB_delta[ibase >> 7] = trydelta; + + /* Check the 16-bit linear values alone: */ + error_count16 = 0; + for (i16=ibase; i16 < ibase+128; ++i16) + { + unsigned int i = 255*i16; + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (icalc != iexact) + ++error_count16; + } + + if (error_count16 == 0) + break; + + if (ecbase == 0) + { + eco = ecbase = error_count16; + ++trybase; /* First test */ + } + + else if (error_count16 < ecbase) + { + if (trybase > base) + { + base = trybase; + ++trybase; + } + else if (trybase < base) + { + base = trybase; + --trybase; + } + else if (trydelta > delta) + { + delta = trydelta; + ++trydelta; + } + else if (trydelta < delta) + { + delta = trydelta; + --trydelta; + } + else + { + fprintf(stderr, "makesRGB: impossible\n"); + exit(1); + } + ecbase = error_count16; + } + + else + { + if (trybase > base) + trybase = base-1; + else if (trybase < base) + { + trybase = base; + ++trydelta; + } + else if (trydelta > delta) + trydelta = delta-1; + else if (trydelta < delta) + break; /* end of tests */ + } + } + + png_sRGB_base[ibase >> 7] = base; + png_sRGB_delta[ibase >> 7] = delta; + if (base != ob || delta != od) + { + printf("/* table[%u]={%u,%u} -> {%u,%u} %u -> %u errors */\n", + ibase>>7, ob, od, base, delta, eco, ecbase); + } + else if (0) + printf("/* table[%u]={%u,%u} %u errors */\n", ibase>>7, ob, od, + ecbase); + } + + /* Only do the full (slow) test at the end: */ + min_error = -.4999; + max_error = .4999; + error_count = 0; + + for (i=0; i <= max_input; ++i) + { + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (icalc != iexact) + { + double err = 255*sRGB(i) - icalc; + + if (err > (max_error+.001) || err < (min_error-.001)) + { + printf( + "/* 0x%08x: exact: %3d, got: %3d [tables: %08x, %08x] (%f) */\n", + i, iexact, icalc, png_sRGB_base[i>>15], + png_sRGB_delta[i>>15], err); + } + + ++error_count; + if (err > max_error) + max_error = err; + else if (err < min_error) + min_error = err; + } + } + + /* Re-check the 16-bit cases too, including the warning if there is an error + * bigger than 1. + */ + error_count16 = 0; + max_error16 = 0; + min_error16 = 0; + for (i16=0; i16 <= 65535; ++i16) + { + unsigned int i = 255*i16; + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (icalc != iexact) + { + double err = 255*sRGB(i) - icalc; + + ++error_count16; + if (err > max_error16) + max_error16 = err; + else if (err < min_error16) + min_error16 = err; + + if (abs(icalc - iexact) > 1) + printf( + "/* 0x%04x: exact: %3d, got: %3d [tables: %08x, %08x] (%f) */\n", + i16, iexact, icalc, png_sRGB_base[i>>15], + png_sRGB_delta[i>>15], err); + } + } + + /* Check the round trip for each 8-bit sRGB value. */ + for (i16=0; i16 <= 255; ++i16) + { + unsigned int i = 255 * png_sRGB_table[i16]; + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (i16 != iexact) + { + fprintf(stderr, "8-bit rounding error: %d -> %d\n", i16, iexact); + exit(1); + } + + if (icalc != i16) + { + double finv = finvsRGB(i16); + + printf("/* 8-bit roundtrip error: %d -> %f -> %d(%f) */\n", + i16, finv, icalc, fsRGB(255*finv)); + } + } + + + printf("/* error: %g - %g, %u (%g%%) of readings inexact */\n", + min_error, max_error, error_count, (100.*error_count)/max_input); + printf("/* 16-bit error: %g - %g, %u (%g%%) of readings inexact */\n", + min_error16, max_error16, error_count16, (100.*error_count16)/65535); + + if (!test_only) + { + printf("PNG_CONST png_uint_16 png_sRGB_table[256] =\n{\n "); + for (i=0; i<255; ) + { + do + { + printf("%d,", png_sRGB_table[i++]); + } + while ((i & 0x7) != 0 && i<255); + if (i<255) printf("\n "); + } + printf("%d\n};\n\n", png_sRGB_table[i]); + + + printf("PNG_CONST png_uint_16 png_sRGB_base[512] =\n{\n "); + for (i=0; i<511; ) + { + do + { + printf("%d,", png_sRGB_base[i++]); + } + while ((i & 0x7) != 0 && i<511); + if (i<511) printf("\n "); + } + printf("%d\n};\n\n", png_sRGB_base[i]); + + printf("PNG_CONST png_byte png_sRGB_delta[512] =\n{\n "); + for (i=0; i<511; ) + { + do + { + printf("%d,", png_sRGB_delta[i++]); + } + while ((i & 0xf) != 0 && i<511); + if (i<511) printf("\n "); + } + printf("%d\n};\n\n", png_sRGB_delta[i]); + } + + return 0; +} diff -ru4NwbB libpng-1.5.10/contrib/tools/sRGB.h libpng-1.6.0beta22/contrib/tools/sRGB.h --- libpng-1.5.10/contrib/tools/sRGB.h 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/contrib/tools/sRGB.h 2012-05-23 12:30:58.983254736 -0500 @@ -0,0 +1,48 @@ +/*- + * sRGB.h + * + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * + * COPYRIGHT: Written by John Cunningham Bowler, 2012. + * To the extent possible under law, the author has waived all copyright and + * related or neighboring rights to this work. This work is published from: + * United States. + * + * Utility file; not actually a header, this contains definitions of sRGB + * calculation functions for inclusion in those test programs that need them. + * + * All routines take and return a floating point value in the range + * 0 to 1.0, doing a calculation according to the sRGB specification + * (in fact the source of the numbers is the wikipedia article at + * http://en.wikipedia.org/wiki/SRGB). + */ +static double +sRGB_from_linear(double l) +{ + if (l <= 0.0031308) + l *= 12.92; + + else + l = 1.055 * pow(l, 1/2.4) - 0.055; + + return l; +} + +static double +linear_from_sRGB(double s) +{ + if (s <= 0.04045) + return s / 12.92; + + else + return pow((s+0.055)/1.055, 2.4); +} + +static double +YfromRGB(double r, double g, double b) +{ + /* Use the sRGB (rounded) coefficients for Rlinear, Glinear, Blinear to get + * the CIE Y value (also linear). + */ + return 0.2126 * r + 0.7152 * g + 0.0722 * b; +} diff -ru4NwbB libpng-1.5.10/contrib/visupng/PngFile.c libpng-1.6.0beta22/contrib/visupng/PngFile.c --- libpng-1.5.10/contrib/visupng/PngFile.c 2011-09-03 09:35:07.000000000 -0500 +++ libpng-1.6.0beta22/contrib/visupng/PngFile.c 2011-12-22 14:58:47.000000000 -0600 @@ -12,8 +12,9 @@ #include #include #include #include +#include #include "png.h" #include "pngfile.h" #include "cexcept.h" diff -ru4NwbB libpng-1.5.10/contrib/visupng/VisualPng.c libpng-1.6.0beta22/contrib/visupng/VisualPng.c --- libpng-1.5.10/contrib/visupng/VisualPng.c 2011-09-03 09:23:17.000000000 -0500 +++ libpng-1.6.0beta22/contrib/visupng/VisualPng.c 2011-12-22 14:58:32.000000000 -0600 @@ -26,8 +26,9 @@ #include #include #include #include +#include /* application includes */ #include "png.h" diff -ru4NwbB libpng-1.5.10/example.c libpng-1.6.0beta22/example.c --- libpng-1.5.10/example.c 2012-03-29 00:06:54.523193383 -0500 +++ libpng-1.6.0beta22/example.c 2012-05-23 12:30:56.084708654 -0500 @@ -1,34 +1,203 @@ #if 0 /* in case someone actually tries to compile this */ /* example.c - an example of using libpng - * Last changed in libpng 1.5.10 [March 8, 2012] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Maintained 1998-2012 Glenn Randers-Pehrson - * Maintained 1996, 1997 Andreas Dilger - * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc. + * Maintained 1996, 1997 Andreas Dilger) + * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * To the extent possible under law, the authors have waived + * all copyright and related or neighboring rights to this file. + * This work is published from: United States. */ /* This is an example of how to use libpng to read and write PNG files. * The file libpng-manual.txt is much more verbose then this. If you have not * read it, do so first. This was designed to be a starting point of an * implementation. This is not officially part of libpng, is hereby placed * in the public domain, and therefore does not require a copyright notice. - * To the extent possible under law, the authors have waived all copyright and - * related or neighboring rights to this file. * * This file does not currently compile, because it is missing certain * parts, like allocating memory to hold an image. You will have to * supply these parts to get it to compile. For an example of a minimal * working PNG reader/writer, see pngtest.c, included in this distribution; * see also the programs in the contrib directory. */ -#define _POSIX_SOURCE 1 /* libpng and zlib are POSIX-compliant. You may - * change this if your application uses non-POSIX - * extensions. */ +/* The simple, but restricted, approach to reading a PNG file or data stream + * just requires two function calls, as in the following complete program. + * Writing a file just needs one function call, so long as the data has an + * appropriate layout. + * + * The following code reads PNG image data from a file and writes it, in a + * potentially new format, to a new file. While this code will compile there is + * minimal (insufficient) error checking; for a more realistic version look at + * contrib/examples/pngtopng.c + */ +#include +#include +#include +#include +#include +#include + +int main(int argc, const char **argv) +{ + if (argc == 3) + { + png_image image; /* The control structure used by libpng */ + + /* Initialize the 'png_image' structure. */ + memset(&image, 0, sizeof image); + + /* The first argument is the file to read: */ + if (png_image_begin_read_from_file(&image, argv[1])) + { + png_bytep buffer; + + /* Set the format in which to read the PNG file; this code chooses a + * simple sRGB format with a non-associated alpha channel, adequate to + * store most images. + */ + image.format = PNG_FORMAT_RGBA; + + /* Now allocate enough memory to hold the image in this format; the + * PNG_IMAGE_SIZE macro uses the information about the image (width, + * height and format) stored in 'image'. + */ + buffer = malloc(PNG_IMAGE_SIZE(image)); + + /* If enough memory was available read the image in the desired format + * then write the result out to the new file. 'background' is not + * necessary when reading the image because the alpha channel is + * preserved; if it were to be removed, for example if we requested + * PNG_FORMAT_RGB, then either a solid background color would have to + * be supplied or the output buffer would have to be initialized to the + * actual background of the image. + * + * The final argument to png_image_finish_read is the 'row_stride' - + * this is the number of components allocated for the image in each + * row. It has to be at least as big as the value returned by + * PNG_IMAGE_ROW_STRIDE, but if you just allocate space for the + * default, minimum, size using PNG_IMAGE_SIZE as above you can pass + * zero. + */ + if (buffer != NULL && + png_image_finish_read(&image, NULL/*background*/, buffer, + 0/*row_stride*/)) + { + /* Now write the image out to the second argument. In the write + * call 'convert_to_8bit' allows 16-bit data to be squashed down to + * 8 bits; this isn't necessary here because the original read was + * to the 8-bit format. + */ + if (png_image_write_to_file(&image, argv[2], 0/*convert_to_8bit*/, + buffer, 0/*row_stride*/)) + { + /* The image has been written successfully. */ + exit(0); + } + } + + else + { + /* Calling png_free_image is optional unless the simplified API was + * not run to completion. In this case if there wasn't enough + * memory for 'buffer' we didn't complete the read, so we must free + * the image: + */ + if (buffer == NULL) + png_free_image(&image); -#include "png.h" + else + free(buffer); + } + + /* Something went wrong reading or writing the image. libpng stores a + * textual message in the 'png_image' structure: + */ + fprintf(stderr, "pngtopng: error: %s\n", image.message); + exit (1); + } + + fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n"); + exit(1); +} + +/* That's it ;-) Of course you probably want to do more with PNG files than + * just converting them all to 32-bit RGBA PNG files; you can do that between + * the call to png_image_finish_read and png_image_write_to_file. You can also + * ask for the image data to be presented in a number of different formats. You + * do this by simply changing the 'format' parameter set before allocating the + * buffer. + * + * The format parameter consists of five flags that define various aspects of + * the image, you can simply add these together to get the format or you can use + * one of the predefined macros from png.h (as above): + * + * PNG_FORMAT_FLAG_COLOR: if set the image will have three color components per + * pixel (red, green and blue), if not set the image will just have one + * luminance (grayscale) component. + * + * PNG_FORMAT_FLAG_ALPHA: if set each pixel in the image will have an additional + * alpha value; a linear value that describes the degree the image pixel + * covers (overwrites) the contents of the existing pixel on the display. + * + * PNG_FORMAT_FLAG_LINEAR: if set the components of each pixel will be returned + * as a series of 16-bit linear values, if not set the components will be + * returned as a series of 8-bit values encoded according to the 'sRGB' + * standard. The 8-bit format is the normal format for images intended for + * direct display, because almost all display devices do the inverse of the + * sRGB transformation to the data they receive. The 16-bit format is more + * common for scientific data and image data that must be further processed; + * because it is linear simple math can be done on the component values. + * Regardless of the setting of this flag the alpha channel is always linear, + * although it will be 8 bits or 16 bits wide as specified by the flag. + * + * PNG_FORMAT_FLAG_BGR: if set the components of a color pixel will be returned + * in the order blue, then green, then red. If not set the pixel components + * are in the order red, then green, then blue. + * + * PNG_FORMAT_FLAG_AFIRST: if set the alpha channel (if present) precedes the + * color or grayscale components. If not set the alpha channel follows the + * components. + * + * You do not have to read directly from a file. You can read from memory or, + * on systems that support it, from a FILE*. This is controlled by + * the particular png_image_read_from_ function you call at the start. Likewise + * on write you can write to a FILE* if your system supports it. Check the + * macro PNG_STDIO_SUPPORTED to see if stdio support has been included in your + * libpng build. + * + * If you read 16-bit (PNG_FORMAT_FLAG_LINEAR) data you may need to write it in + * the 8-bit format for display. You do this by setting the convert_to_8bit + * flag to 'true'. + * + * Don't repeatedly convert between the 8-bit and 16-bit forms. There is + * significant data loss when 16-bit data is converted to the 8-bit encoding and + * the current libpng implementation of convertion to 16-bit is also + * significantly lossy. The latter will be fixed in the future, but the former + * is unavoidable - the 8-bit format just doesn't have enough resolution. + */ + +/* If your program needs more information from the PNG data it reads, or if you + * need to do more complex transformations, or minimise transformations, on the + * data you read, then you must use one of the several lower level libpng + * interfaces. + * + * All these interfaces require that you do your own error handling - your + * program must be able to arrange for control to return to your own code any + * time libpng encounters a problem. There are several ways to do this, but the + * standard way is to use the ANSI-C (C90) interface to establish a + * return point within your own code. You must do this if you do not use the + * simplified interface (above). + * + * The first step is to include the header files you need, including the libpng + * header file. Include any standard headers and feature test macros your + * program requires before including png.h: + */ +#include /* The png_jmpbuf() macro, used in error handling, became available in * libpng version 1.0.6. If you want to be able to run your code with older * versions of libpng, you must define the macro yourself (but only if it @@ -548,9 +717,9 @@ * For the non-NULL rows of interlaced images, you must call * png_progressive_combine_row() passing in the new row and the * old row, as demonstrated above. You can call this function for * NULL rows (it will just return) and for non-interlaced images - * (it just does the png_memcpy for you) if it will make the code + * (it just does the memcpy for you) if it will make the code * easier. Thus, you can just do this for all cases: */ png_progressive_combine_row(png_ptr, old_row, new_row); diff -ru4NwbB libpng-1.5.10/png.c libpng-1.6.0beta22/png.c --- libpng-1.5.10/png.c 2012-03-29 00:06:54.535945504 -0500 +++ libpng-1.6.0beta22/png.c 2012-05-23 12:30:56.100395636 -0500 @@ -1,8 +1,8 @@ /* png.c - location for general purpose libpng functions * - * Last changed in libpng 1.5.10 [March 8, 2012] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -23,9 +23,9 @@ */ #ifdef PNG_READ_SUPPORTED void PNGAPI -png_set_sig_bytes(png_structp png_ptr, int num_bytes) +png_set_sig_bytes(png_structrp png_ptr, int num_bytes) { png_debug(1, "in png_set_sig_bytes"); if (png_ptr == NULL) @@ -71,42 +71,36 @@ /* Function to allocate memory for zlib */ PNG_FUNCTION(voidpf /* PRIVATE */, png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED) { - png_voidp ptr; - png_structp p=(png_structp)png_ptr; - png_uint_32 save_flags=p->flags; - png_alloc_size_t num_bytes; + png_alloc_size_t num_bytes = size; if (png_ptr == NULL) - return (NULL); + return NULL; - if (items > PNG_UINT_32_MAX/size) + if (items >= (~(png_alloc_size_t)0)/size) { - png_warning (p, "Potential overflow in png_zalloc()"); - return (NULL); + png_warning (png_voidcast(png_structrp, png_ptr), + "Potential overflow in png_zalloc()"); + return NULL; } - num_bytes = (png_alloc_size_t)items * size; - - p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; - ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); - p->flags=save_flags; - return ((voidpf)ptr); + num_bytes *= items; + return png_malloc_warn(png_voidcast(png_structrp, png_ptr), num_bytes); } /* Function to free memory for zlib */ void /* PRIVATE */ png_zfree(voidpf png_ptr, voidpf ptr) { - png_free((png_structp)png_ptr, (png_voidp)ptr); + png_free(png_voidcast(png_const_structrp,png_ptr), ptr); } /* Reset the CRC variable to 32 bits of 1's. Care must be taken * in case CRC is > 32 bits to leave the top bits 0. */ void /* PRIVATE */ -png_reset_crc(png_structp png_ptr) +png_reset_crc(png_structrp png_ptr) { /* The cast is safe because the crc is a 32 bit value. */ png_ptr->crc = (png_uint_32)crc32(0, Z_NULL, 0); } @@ -116,9 +110,9 @@ * also check that this data will actually be used before going to the * trouble of calculating it. */ void /* PRIVATE */ -png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length) +png_calculate_crc(png_structrp png_ptr, png_const_bytep ptr, png_size_t length) { int need_crc = 1; if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) @@ -168,9 +162,9 @@ /* Check a user supplied version number, called from both read and write * functions that create a png_struct */ int -png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver) +png_user_version_check(png_structrp png_ptr, png_const_charp user_png_ver) { if (user_png_ver) { int i = 0; @@ -219,45 +213,147 @@ /* Success return. */ return 1; } -/* Allocate the memory for an info_struct for the application. We don't - * really need the png_ptr, but it could potentially be useful in the - * future. This should be used in favour of malloc(png_sizeof(png_info)) - * and png_info_init() so that applications that want to use a shared - * libpng don't have to be recompiled if png_info changes size. +/* Generic function to create a png_struct for either read or write - this + * contains the common initialization. + */ +PNG_FUNCTION(png_structp /* PRIVATE */, +png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) +{ + png_struct create_struct; +# ifdef PNG_SETJMP_SUPPORTED + jmp_buf create_jmp_buf; +# endif + + /* This temporary stack-allocated structure is used to provide a place to + * build enough context to allow the user provided memory allocator (if any) + * to be called. + */ + png_memset(&create_struct, 0, sizeof create_struct); + + /* Added at libpng-1.2.6 */ +# ifdef PNG_USER_LIMITS_SUPPORTED + create_struct.user_width_max = PNG_USER_WIDTH_MAX; + create_struct.user_height_max = PNG_USER_HEIGHT_MAX; + +# ifdef PNG_USER_CHUNK_CACHE_MAX + /* Added at libpng-1.2.43 and 1.4.0 */ + create_struct.user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; +# endif + +# ifdef PNG_SET_USER_CHUNK_MALLOC_MAX + /* Added at libpng-1.2.43 and 1.4.1, required only for read but exists + * in png_struct regardless. + */ + create_struct.user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; +# endif +# endif + + /* The following two API calls simply set fields in png_struct, so it is safe + * to do them now even though error handling is not yet set up. */ +# ifdef PNG_USER_MEM_SUPPORTED + png_set_mem_fn(&create_struct, mem_ptr, malloc_fn, free_fn); +# endif + + /* (*error_fn) can return control to the caller after the error_ptr is set, + * this will result in a memory leak unless the error_fn does something + * extremely sophisticated. The design lacks merit but is implicit in the + * API. + */ + png_set_error_fn(&create_struct, error_ptr, error_fn, warn_fn); + +# ifdef PNG_SETJMP_SUPPORTED + if (!setjmp(create_jmp_buf)) + { + /* Temporarily fake out the longjmp information until we have + * successfully completed this function. This only works if we have + * setjmp() support compiled in, but it is safe - this stuff should + * never happen. + */ + create_struct.jmp_buf_ptr = &create_jmp_buf; + create_struct.jmp_buf_size = 0; /*stack allocation*/ + create_struct.longjmp_fn = longjmp; +# else + { +# endif + /* Call the general version checker (shared with read and write code): + */ + if (png_user_version_check(&create_struct, user_png_ver)) + { + png_structrp png_ptr = png_voidcast(png_structrp, + png_malloc_warn(&create_struct, sizeof *png_ptr)); + + if (png_ptr != NULL) + { + /* png_ptr->zstream holds a back-pointer to the png_struct, so + * this can only be done now: + */ + create_struct.zstream.zalloc = png_zalloc; + create_struct.zstream.zfree = png_zfree; + create_struct.zstream.opaque = png_ptr; + +# ifdef PNG_SETJMP_SUPPORTED + /* Eliminate the local error handling: */ + create_struct.jmp_buf_ptr = NULL; + create_struct.jmp_buf_size = 0; + create_struct.longjmp_fn = 0; +# endif + + *png_ptr = create_struct; + + /* This is the successful return point */ + return png_ptr; + } + } + } + + /* A longjmp because of a bug in the application storage allocator or a + * simple failure to allocate the png_struct. + */ + return NULL; +} + +/* Allocate the memory for an info_struct for the application. */ PNG_FUNCTION(png_infop,PNGAPI -png_create_info_struct,(png_structp png_ptr),PNG_ALLOCATED) +png_create_info_struct,(png_const_structrp png_ptr),PNG_ALLOCATED) { - png_infop info_ptr; + png_inforp info_ptr; png_debug(1, "in png_create_info_struct"); if (png_ptr == NULL) - return (NULL); + return NULL; + + /* Use the internal API that does not (or at least should not) error out, so + * that this call always returns ok. The application typically sets up the + * error handling *after* creating the info_struct because this is the way it + * has always been done in 'example.c'. + */ + info_ptr = png_voidcast(png_inforp, png_malloc_base(png_ptr, + sizeof *info_ptr)); -#ifdef PNG_USER_MEM_SUPPORTED - info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, - png_ptr->malloc_fn, png_ptr->mem_ptr); -#else - info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); -#endif if (info_ptr != NULL) - png_info_init_3(&info_ptr, png_sizeof(png_info)); + png_memset(info_ptr, 0, sizeof *info_ptr); - return (info_ptr); + return info_ptr; } /* This function frees the memory associated with a single info struct. * Normally, one would use either png_destroy_read_struct() or * png_destroy_write_struct() to free an info struct, but this may be - * useful for some applications. + * useful for some applications. From libpng 1.6.0 this function is also used + * internally to implement the png_info release part of the 'struct' destroy + * APIs. This ensures that all possible approaches free the same data (all of + * it). */ void PNGAPI -png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) +png_destroy_info_struct(png_const_structrp png_ptr, png_infopp info_ptr_ptr) { - png_infop info_ptr = NULL; + png_inforp info_ptr = NULL; png_debug(1, "in png_destroy_info_struct"); if (png_ptr == NULL) @@ -267,48 +363,59 @@ info_ptr = *info_ptr_ptr; if (info_ptr != NULL) { - png_info_destroy(png_ptr, info_ptr); - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn, - png_ptr->mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif + /* Do this first in case of an error below; if the app implements its own + * memory management this can lead to png_free calling png_error, which + * will abort this routine and return control to the app error handler. + * An infinite loop may result if it then tries to free the same info + * ptr. + */ *info_ptr_ptr = NULL; + + png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); + png_memset(info_ptr, 0, sizeof *info_ptr); + png_free(png_ptr, info_ptr); } } /* Initialize the info structure. This is now an internal function (0.89) * and applications using it are urged to use png_create_info_struct() - * instead. - */ - -void PNGAPI -png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size) + * instead. Use deprecated in 1.6.0, internal use removed (used internally it + * is just a memset). + * + * NOTE: it is almost inconceivable that this API is used because it bypasses + * the user-memory mechanism and the user error handling/warning mechanisms in + * those cases where it does anything other than a memset. + */ +PNG_FUNCTION(void,PNGAPI +png_info_init_3,(png_infopp ptr_ptr, png_size_t png_info_struct_size), + PNG_DEPRECATED) { - png_infop info_ptr = *ptr_ptr; + png_inforp info_ptr = *ptr_ptr; png_debug(1, "in png_info_init_3"); if (info_ptr == NULL) return; if (png_sizeof(png_info) > png_info_struct_size) { - png_destroy_struct(info_ptr); - info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); + *ptr_ptr = NULL; + /* The following line is why this API should not be used: */ + free(info_ptr); + info_ptr = png_voidcast(png_inforp, png_malloc_base(NULL, + sizeof *info_ptr)); *ptr_ptr = info_ptr; } /* Set everything to 0 */ - png_memset(info_ptr, 0, png_sizeof(png_info)); + png_memset(info_ptr, 0, sizeof *info_ptr); } +/* The following API is not called internally */ void PNGAPI -png_data_freer(png_structp png_ptr, png_infop info_ptr, +png_data_freer(png_const_structrp png_ptr, png_inforp info_ptr, int freer, png_uint_32 mask) { png_debug(1, "in png_data_freer"); @@ -321,14 +428,13 @@ else if (freer == PNG_USER_WILL_FREE_DATA) info_ptr->free_me &= ~mask; else - png_warning(png_ptr, - "Unknown freer parameter in png_data_freer"); + png_error(png_ptr, "Unknown freer parameter in png_data_freer"); } void PNGAPI -png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, +png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask, int num) { png_debug(1, "in png_free_data"); @@ -405,9 +511,9 @@ } #endif #ifdef PNG_iCCP_SUPPORTED - /* Free any iCCP entry */ + /* Free any profile entry */ if ((mask & PNG_FREE_ICCP) & info_ptr->free_me) { png_free(png_ptr, info_ptr->iccp_name); png_free(png_ptr, info_ptr->iccp_profile); @@ -449,14 +555,8 @@ } #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - if (png_ptr->unknown_chunk.data) - { - png_free(png_ptr, png_ptr->unknown_chunk.data); - png_ptr->unknown_chunk.data = NULL; - } - if ((mask & PNG_FREE_UNKN) & info_ptr->free_me) { if (num != -1) { @@ -496,9 +596,9 @@ /* Free any PLTE entry that was internally allocated */ if ((mask & PNG_FREE_PLTE) & info_ptr->free_me) { - png_zfree(png_ptr, info_ptr->palette); + png_free(png_ptr, info_ptr->palette); info_ptr->palette = NULL; info_ptr->valid &= ~PNG_INFO_PLTE; info_ptr->num_palette = 0; } @@ -526,39 +626,16 @@ mask &= ~PNG_FREE_MUL; info_ptr->free_me &= ~mask; } - -/* This is an internal routine to free any memory that the info struct is - * pointing to before re-using it or freeing the struct itself. Recall - * that png_free() checks for NULL pointers for us. - */ -void /* PRIVATE */ -png_info_destroy(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_info_destroy"); - - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list = NULL; - png_ptr->num_chunk_list = 0; - } -#endif - - png_info_init_3(&info_ptr, png_sizeof(png_info)); -} #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ /* This function returns a pointer to the io_ptr associated with the user * functions. The application should free any memory associated with this * pointer before png_write_destroy() or png_read_destroy() are called. */ png_voidp PNGAPI -png_get_io_ptr(png_structp png_ptr) +png_get_io_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) return (NULL); @@ -573,9 +650,9 @@ * PNG_NO_STDIO or otherwise disabled PNG_STDIO_SUPPORTED, you must use a * function of your own because "FILE *" isn't necessarily available. */ void PNGAPI -png_init_io(png_structp png_ptr, png_FILE_p fp) +png_init_io(png_structrp png_ptr, png_FILE_p fp) { png_debug(1, "in png_init_io"); if (png_ptr == NULL) @@ -588,40 +665,33 @@ # ifdef PNG_TIME_RFC1123_SUPPORTED /* Convert the supplied time into an RFC 1123 string suitable for use in * a "Creation Time" or other text-based time string. */ -png_const_charp PNGAPI -png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime) +int PNGAPI +png_convert_to_rfc1123_buffer(char out[29], png_const_timep ptime) { static PNG_CONST char short_months[12][4] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; - if (png_ptr == NULL) - return (NULL); + if (out == NULL) + return 0; if (ptime->year > 9999 /* RFC1123 limitation */ || ptime->month == 0 || ptime->month > 12 || ptime->day == 0 || ptime->day > 31 || ptime->hour > 23 || ptime->minute > 59 || ptime->second > 60) - { - png_warning(png_ptr, "Ignoring invalid time value"); - return (NULL); - } + return 0; { size_t pos = 0; char number_buf[5]; /* enough for a four-digit year */ -# define APPEND_STRING(string)\ - pos = png_safecat(png_ptr->time_buffer, sizeof png_ptr->time_buffer,\ - pos, (string)) +# define APPEND_STRING(string) pos = png_safecat(out, 29, pos, (string)) # define APPEND_NUMBER(format, value)\ APPEND_STRING(PNG_FORMAT_NUMBER(number_buf, format, (value))) -# define APPEND(ch)\ - if (pos < (sizeof png_ptr->time_buffer)-1)\ - png_ptr->time_buffer[pos++] = (ch) +# define APPEND(ch) if (pos < 28) out[pos++] = (ch) APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day); APPEND(' '); APPEND_STRING(short_months[(ptime->month - 1)]); @@ -639,31 +709,53 @@ # undef APPEND_NUMBER # undef APPEND_STRING } + return 1; +} + +# if PNG_LIBPNG_VER < 10700 +/* Original API that uses a private buffer in png_struct. + * TODO: deprecate this, it causes png_struct to carry a spurious temporary + * buffer (png_struct::time_buffer), better to have the caller pass this in. + */ +png_const_charp PNGAPI +png_convert_to_rfc1123(png_structrp png_ptr, png_const_timep ptime) +{ + if (png_ptr != NULL) + { + /* The only failure above if png_ptr != NULL is from an invalid ptime */ + if (!png_convert_to_rfc1123_buffer(png_ptr->time_buffer, ptime)) + png_warning(png_ptr, "Ignoring invalid time value"); + + else return png_ptr->time_buffer; } + + return NULL; +} +# endif # endif /* PNG_TIME_RFC1123_SUPPORTED */ #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ png_const_charp PNGAPI -png_get_copyright(png_const_structp png_ptr) +png_get_copyright(png_const_structrp png_ptr) { PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ #ifdef PNG_STRING_COPYRIGHT return PNG_STRING_COPYRIGHT #else # ifdef __STDC__ return PNG_STRING_NEWLINE \ "libpng version 1.6.0beta22 - May 23, 2012" PNG_STRING_NEWLINE \ - "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ + "Copyright (c) 1998-2012 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ PNG_STRING_NEWLINE; # else return "libpng version 1.6.0beta22 - May 23, 2012\ - Copyright (c) 1998-2011 Glenn Randers-Pehrson\ + Copyright (c) 1998-2012 Glenn Randers-Pehrson\ Copyright (c) 1996-1997 Andreas Dilger\ Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; # endif #endif @@ -677,24 +769,24 @@ * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard, * it is guaranteed that png.c uses the correct version of png.h. */ png_const_charp PNGAPI -png_get_libpng_ver(png_const_structp png_ptr) +png_get_libpng_ver(png_const_structrp png_ptr) { /* Version of *.c files used when building libpng */ return png_get_header_ver(png_ptr); } png_const_charp PNGAPI -png_get_header_ver(png_const_structp png_ptr) +png_get_header_ver(png_const_structrp png_ptr) { /* Version of *.h files used when building libpng */ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ return PNG_LIBPNG_VER_STRING; } png_const_charp PNGAPI -png_get_header_version(png_const_structp png_ptr) +png_get_header_version(png_const_structrp png_ptr) { /* Returns longer string containing both version and date */ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ #ifdef __STDC__ @@ -709,14 +801,14 @@ } #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED int PNGAPI -png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name) +png_handle_as_unknown(png_structrp png_ptr, png_const_bytep chunk_name) { /* Check chunk_name and return "keep" value if it's on the list, else 0 */ png_const_bytep p, p_end; - if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list <= 0) + if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list == 0) return PNG_HANDLE_CHUNK_AS_DEFAULT; p_end = png_ptr->chunk_list; p = p_end + png_ptr->num_chunk_list*5; /* beyond end */ @@ -736,9 +828,9 @@ return PNG_HANDLE_CHUNK_AS_DEFAULT; } int /* PRIVATE */ -png_chunk_unknown_handling(png_structp png_ptr, png_uint_32 chunk_name) +png_chunk_unknown_handling(png_structrp png_ptr, png_uint_32 chunk_name) { png_byte chunk_string[5]; PNG_CSTRING_FROM_CHUNK(chunk_string, chunk_name); @@ -748,13 +840,14 @@ #ifdef PNG_READ_SUPPORTED /* This function, added to libpng-1.0.6g, is untested. */ int PNGAPI -png_reset_zstream(png_structp png_ptr) +png_reset_zstream(png_structrp png_ptr) { if (png_ptr == NULL) return Z_STREAM_ERROR; + /* WARNING: this resets the window bits to the maximum! */ return (inflateReset(&png_ptr->zstream)); } #endif /* PNG_READ_SUPPORTED */ @@ -768,17 +861,236 @@ #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) +/* Ensure that png_ptr->zstream.msg holds some appropriate error message string. + * If it doesn't 'ret' is used to set it to something appropriate, even in cases + * like Z_OK or Z_STREAM_END where the error code is apparently a success code. + */ +void /* PRIVATE */ +png_zstream_error(png_structrp png_ptr, int ret) +{ + /* Translate 'ret' into an appropriate error string, priority is given to the + * one in zstream if set. This always returns a string, even in cases like + * Z_OK or Z_STREAM_END where the error code is a success code. + */ + if (png_ptr->zstream.msg == NULL) switch (ret) + { + default: + case Z_OK: + png_ptr->zstream.msg = PNGZ_MSG_CAST("unexpected zlib return code"); + break; + + case Z_STREAM_END: + /* Normal exit */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("unexpected end of LZ stream"); + break; + + case Z_NEED_DICT: + /* This means the deflate stream did not have a dictionary; this + * indicates a bogus PNG. + */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("missing LZ dictionary"); + break; + + case Z_ERRNO: + /* gz APIs only: should not happen */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("zlib IO error"); + break; + + case Z_STREAM_ERROR: + /* internal libpng error */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("bad parameters to zlib"); + break; + + case Z_DATA_ERROR: + png_ptr->zstream.msg = PNGZ_MSG_CAST("damaged LZ stream"); + break; + + case Z_MEM_ERROR: + png_ptr->zstream.msg = PNGZ_MSG_CAST("insufficient memory"); + break; + + case Z_BUF_ERROR: + /* End of input or output; not a problem if the caller is doing + * incremental read or write. + */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("truncated"); + break; + + case Z_VERSION_ERROR: + png_ptr->zstream.msg = PNGZ_MSG_CAST("unsupported zlib version"); + break; + + case PNG_UNEXPECTED_ZLIB_RETURN: + /* Compile errors here mean that zlib now uses the value co-opted in + * pngpriv.h for PNG_UNEXPECTED_ZLIB_RETURN; update the switch above + * and change pngpriv.h. Note that this message is "... return", + * whereas the default/Z_OK one is "... return code". + */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("unexpected zlib return"); + break; + } +} + /* png_convert_size: a PNGAPI but no longer in png.h, so deleted * at libpng 1.5.5! */ /* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */ -# ifdef PNG_CHECK_cHRM_SUPPORTED +#ifdef PNG_GAMMA_SUPPORTED /* always set if COLORSPACE */ +static int +png_colorspace_check_gamma(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_fixed_point gAMA, int preferred) +{ + /* The 'invalid' flag needs to be sticky, doing things this way avoids having + * many messages caused by just one invalid colorspace chunk. + */ + if (colorspace->flags & PNG_COLORSPACE_INVALID) + return 0; + + if (preferred < 2 && (colorspace->flags & PNG_COLORSPACE_HAVE_GAMMA)) + { + png_fixed_point gtest; + + if (!png_muldiv(>est, colorspace->gamma, PNG_FP_1, gAMA) || + png_gamma_significant(gtest)) + { + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_benign_error(png_ptr, "inconsistent gamma values"); + return 0; /* failed */ + } + + else if (!preferred) + return 1; /* ok, use existing gamma */ + } + + return 2; /* ok, write gamma */ +} int /* PRIVATE */ -png_check_cHRM_fixed(png_structp png_ptr, +png_colorspace_set_gamma(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_fixed_point gAMA, int preferred) +{ + int result = png_colorspace_check_gamma(png_ptr, colorspace, gAMA, + preferred); + + if (result == 2) + { + colorspace->gamma = gAMA; + colorspace->flags |= PNG_COLORSPACE_HAVE_GAMMA; + } + + return result; +} + +void /* PRIVATE */ +png_colorspace_sync_info(png_const_structrp png_ptr, png_inforp info_ptr) +{ + if (info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) + { + /* Everything is invalid */ + info_ptr->valid &= ~(PNG_INFO_gAMA|PNG_INFO_cHRM|PNG_INFO_sRGB| + PNG_INFO_iCCP); + +# ifdef PNG_COLORSPACE_SUPPORTED + /* Clean up the iCCP profile now if it won't be used. */ + png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, -1/*not used*/); +# else + PNG_UNUSED(png_ptr) +# endif + } + + else + { +# ifdef PNG_COLORSPACE_SUPPORTED + /* Leave the INFO_iCCP flag set if the pngset.c code has already set + * it; this allows a PNG to contain a profile which matches sRGB and + * yet still have that profile retrievable by the application. + */ + if (info_ptr->colorspace.flags & PNG_COLORSPACE_MATCHES_sRGB) + info_ptr->valid |= PNG_INFO_sRGB; + + else + info_ptr->valid &= ~PNG_INFO_sRGB; + + if (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) + info_ptr->valid |= PNG_INFO_cHRM; + + else + info_ptr->valid &= ~PNG_INFO_cHRM; + + /* TODO: at present it is possible to png_set a detectably inconsistent + * ICC profile, this should be handled, somehow. + */ +# endif + + if (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) + info_ptr->valid |= PNG_INFO_gAMA; + + else + info_ptr->valid &= ~PNG_INFO_gAMA; + } +} + +#ifdef PNG_READ_SUPPORTED +void /* PRIVATE */ +png_colorspace_sync(png_const_structrp png_ptr, png_inforp info_ptr) +{ + if (info_ptr == NULL) /* reduce code size; check here not in the caller */ + return; + + info_ptr->colorspace = png_ptr->colorspace; + png_colorspace_sync_info(png_ptr, info_ptr); +} +#endif +#endif + +#ifdef PNG_COLORSPACE_SUPPORTED +#if 0 +/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2, + * 2010: moved from pngset.c) */ +/* + * Multiply two 32-bit numbers, V1 and V2, using 32-bit + * arithmetic, to produce a 64-bit result in the HI/LO words. + * + * A B + * x C D + * ------ + * AD || BD + * AC || CB || 0 + * + * where A and B are the high and low 16-bit words of V1, + * C and D are the 16-bit words of V2, AD is the product of + * A and D, and X || Y is (X << 16) + Y. +*/ +static void +png_64bit_product (long v1, long v2, unsigned long *hi_product, + unsigned long *lo_product) +{ + int a, b, c, d; + long lo, hi, x, y; + + a = (v1 >> 16) & 0xffff; + b = v1 & 0xffff; + c = (v2 >> 16) & 0xffff; + d = v2 & 0xffff; + + lo = b * d; /* BD */ + x = a * d + c * b; /* AD + CB */ + y = ((lo >> 16) & 0xffff) + x; + + lo = (lo & 0xffff) | ((y & 0xffff) << 16); + hi = (y >> 16) & 0xffff; + + hi += a * c; /* AC */ + + *hi_product = (unsigned long)hi; + *lo_product = (unsigned long)lo; +} + +static int +png_check_cHRM_fixed(png_const_structrp png_ptr, png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, png_fixed_point blue_y) { @@ -842,67 +1154,68 @@ } return ret; } -# endif /* PNG_CHECK_cHRM_SUPPORTED */ +#endif /*0*/ -#ifdef PNG_cHRM_SUPPORTED /* Added at libpng-1.5.5 to support read and write of true CIEXYZ values for * cHRM, as opposed to using chromaticities. These internal APIs return * non-zero on a parameter error. The X, Y and Z values are required to be * positive and less than 1.0. */ -int png_xy_from_XYZ(png_xy *xy, png_XYZ XYZ) +static int +png_xy_from_XYZ(png_xy *xy, const png_XYZ *XYZ) { png_int_32 d, dwhite, whiteX, whiteY; - d = XYZ.redX + XYZ.redY + XYZ.redZ; - if (!png_muldiv(&xy->redx, XYZ.redX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->redy, XYZ.redY, PNG_FP_1, d)) return 1; + d = XYZ->redX + XYZ->redY + XYZ->redZ; + if (!png_muldiv(&xy->redx, XYZ->redX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->redy, XYZ->redY, PNG_FP_1, d)) return 1; dwhite = d; - whiteX = XYZ.redX; - whiteY = XYZ.redY; + whiteX = XYZ->redX; + whiteY = XYZ->redY; - d = XYZ.greenX + XYZ.greenY + XYZ.greenZ; - if (!png_muldiv(&xy->greenx, XYZ.greenX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->greeny, XYZ.greenY, PNG_FP_1, d)) return 1; + d = XYZ->greenX + XYZ->greenY + XYZ->greenZ; + if (!png_muldiv(&xy->greenx, XYZ->greenX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->greeny, XYZ->greenY, PNG_FP_1, d)) return 1; dwhite += d; - whiteX += XYZ.greenX; - whiteY += XYZ.greenY; + whiteX += XYZ->greenX; + whiteY += XYZ->greenY; - d = XYZ.blueX + XYZ.blueY + XYZ.blueZ; - if (!png_muldiv(&xy->bluex, XYZ.blueX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->bluey, XYZ.blueY, PNG_FP_1, d)) return 1; + d = XYZ->blueX + XYZ->blueY + XYZ->blueZ; + if (!png_muldiv(&xy->bluex, XYZ->blueX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->bluey, XYZ->blueY, PNG_FP_1, d)) return 1; dwhite += d; - whiteX += XYZ.blueX; - whiteY += XYZ.blueY; + whiteX += XYZ->blueX; + whiteY += XYZ->blueY; - /* The reference white is simply the same of the end-point (X,Y,Z) vectors, + /* The reference white is simply the sum of the end-point (X,Y,Z) vectors, * thus: */ if (!png_muldiv(&xy->whitex, whiteX, PNG_FP_1, dwhite)) return 1; if (!png_muldiv(&xy->whitey, whiteY, PNG_FP_1, dwhite)) return 1; return 0; } -int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy) +static int +png_XYZ_from_xy(png_XYZ *XYZ, const png_xy *xy) { png_fixed_point red_inverse, green_inverse, blue_scale; png_fixed_point left, right, denominator; /* Check xy and, implicitly, z. Note that wide gamut color spaces typically * have end points with 0 tristimulus values (these are impossible end * points, but they are used to cover the possible colors.) */ - if (xy.redx < 0 || xy.redx > PNG_FP_1) return 1; - if (xy.redy < 0 || xy.redy > PNG_FP_1-xy.redx) return 1; - if (xy.greenx < 0 || xy.greenx > PNG_FP_1) return 1; - if (xy.greeny < 0 || xy.greeny > PNG_FP_1-xy.greenx) return 1; - if (xy.bluex < 0 || xy.bluex > PNG_FP_1) return 1; - if (xy.bluey < 0 || xy.bluey > PNG_FP_1-xy.bluex) return 1; - if (xy.whitex < 0 || xy.whitex > PNG_FP_1) return 1; - if (xy.whitey < 0 || xy.whitey > PNG_FP_1-xy.whitex) return 1; + if (xy->redx < 0 || xy->redx > PNG_FP_1) return 1; + if (xy->redy < 0 || xy->redy > PNG_FP_1-xy->redx) return 1; + if (xy->greenx < 0 || xy->greenx > PNG_FP_1) return 1; + if (xy->greeny < 0 || xy->greeny > PNG_FP_1-xy->greenx) return 1; + if (xy->bluex < 0 || xy->bluex > PNG_FP_1) return 1; + if (xy->bluey < 0 || xy->bluey > PNG_FP_1-xy->bluex) return 1; + if (xy->whitex < 0 || xy->whitex > PNG_FP_1) return 1; + if (xy->whitey < 0 || xy->whitey > PNG_FP_1-xy->whitex) return 1; /* The reverse calculation is more difficult because the original tristimulus * value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8 * derived values were recorded in the cHRM chunk; @@ -1081,93 +1394,868 @@ */ /* By the argument, above overflow should be impossible here. The return * value of 2 indicates an internal error to the caller. */ - if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.redy - xy.bluey, 7)) return 2; - if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.redx - xy.bluex, 7)) return 2; + if (!png_muldiv(&left, xy->greenx-xy->bluex, xy->redy - xy->bluey, 7)) + return 2; + if (!png_muldiv(&right, xy->greeny-xy->bluey, xy->redx - xy->bluex, 7)) + return 2; denominator = left - right; - /* Now find the red numerator. */ - if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; - if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; + /* Now find the red numerator. */ + if (!png_muldiv(&left, xy->greenx-xy->bluex, xy->whitey-xy->bluey, 7)) + return 2; + if (!png_muldiv(&right, xy->greeny-xy->bluey, xy->whitex-xy->bluex, 7)) + return 2; + + /* Overflow is possible here and it indicates an extreme set of PNG cHRM + * chunk values. This calculation actually returns the reciprocal of the + * scale value because this allows us to delay the multiplication of white-y + * into the denominator, which tends to produce a small number. + */ + if (!png_muldiv(&red_inverse, xy->whitey, denominator, left-right) || + red_inverse <= xy->whitey /* r+g+b scales = white scale */) + return 1; + + /* Similarly for green_inverse: */ + if (!png_muldiv(&left, xy->redy-xy->bluey, xy->whitex-xy->bluex, 7)) + return 2; + if (!png_muldiv(&right, xy->redx-xy->bluex, xy->whitey-xy->bluey, 7)) + return 2; + if (!png_muldiv(&green_inverse, xy->whitey, denominator, left-right) || + green_inverse <= xy->whitey) + return 1; + + /* And the blue scale, the checks above guarantee this can't overflow but it + * can still produce 0 for extreme cHRM values. + */ + blue_scale = png_reciprocal(xy->whitey) - png_reciprocal(red_inverse) - + png_reciprocal(green_inverse); + if (blue_scale <= 0) return 1; + + + /* And fill in the png_XYZ: */ + if (!png_muldiv(&XYZ->redX, xy->redx, PNG_FP_1, red_inverse)) return 1; + if (!png_muldiv(&XYZ->redY, xy->redy, PNG_FP_1, red_inverse)) return 1; + if (!png_muldiv(&XYZ->redZ, PNG_FP_1 - xy->redx - xy->redy, PNG_FP_1, + red_inverse)) + return 1; + + if (!png_muldiv(&XYZ->greenX, xy->greenx, PNG_FP_1, green_inverse)) return 1; + if (!png_muldiv(&XYZ->greenY, xy->greeny, PNG_FP_1, green_inverse)) return 1; + if (!png_muldiv(&XYZ->greenZ, PNG_FP_1 - xy->greenx - xy->greeny, PNG_FP_1, + green_inverse)) + return 1; + + if (!png_muldiv(&XYZ->blueX, xy->bluex, blue_scale, PNG_FP_1)) return 1; + if (!png_muldiv(&XYZ->blueY, xy->bluey, blue_scale, PNG_FP_1)) return 1; + if (!png_muldiv(&XYZ->blueZ, PNG_FP_1 - xy->bluex - xy->bluey, blue_scale, + PNG_FP_1)) + return 1; + + return 0; /*success*/ +} + +static int +png_XYZ_normalize(png_XYZ *XYZ) +{ + png_int_32 Y; + + if (XYZ->redY < 0 || XYZ->greenY < 0 || XYZ->blueY < 0 || + XYZ->redX < 0 || XYZ->greenX < 0 || XYZ->blueX < 0 || + XYZ->redZ < 0 || XYZ->greenZ < 0 || XYZ->blueZ < 0) + return 1; + + /* Normalize by scaling so the sum of the end-point Y values is PNG_FP_1. + * IMPLEMENTATION NOTE: ANSI requires signed overflow not to occur, therefore + * relying on addition of two positive values producing a negative one is not * safe. + */ + Y = XYZ->redY; + if (0x7fffffff - Y < XYZ->greenX) return 1; + Y += XYZ->greenY; + if (0x7fffffff - Y < XYZ->blueX) return 1; + Y += XYZ->blueY; + + if (Y != PNG_FP_1) + { + if (!png_muldiv(&XYZ->redX, XYZ->redX, PNG_FP_1, Y)) return 1; + if (!png_muldiv(&XYZ->redY, XYZ->redY, PNG_FP_1, Y)) return 1; + if (!png_muldiv(&XYZ->redZ, XYZ->redZ, PNG_FP_1, Y)) return 1; + + if (!png_muldiv(&XYZ->greenX, XYZ->greenX, PNG_FP_1, Y)) return 1; + if (!png_muldiv(&XYZ->greenY, XYZ->greenY, PNG_FP_1, Y)) return 1; + if (!png_muldiv(&XYZ->greenZ, XYZ->greenZ, PNG_FP_1, Y)) return 1; + + if (!png_muldiv(&XYZ->blueX, XYZ->blueX, PNG_FP_1, Y)) return 1; + if (!png_muldiv(&XYZ->blueY, XYZ->blueY, PNG_FP_1, Y)) return 1; + if (!png_muldiv(&XYZ->blueZ, XYZ->blueZ, PNG_FP_1, Y)) return 1; + } + + return 0; +} + +static int +png_colorspace_endpoints_match(const png_xy *xy1, const png_xy *xy2, int delta) +{ + /* Allow an error of +/-0.01 (absolute value) on each chromaticity */ + return !(PNG_OUT_OF_RANGE(xy1->whitex, xy2->whitex,delta) || + PNG_OUT_OF_RANGE(xy1->whitey, xy2->whitey,delta) || + PNG_OUT_OF_RANGE(xy1->redx, xy2->redx, delta) || + PNG_OUT_OF_RANGE(xy1->redy, xy2->redy, delta) || + PNG_OUT_OF_RANGE(xy1->greenx, xy2->greenx,delta) || + PNG_OUT_OF_RANGE(xy1->greeny, xy2->greeny,delta) || + PNG_OUT_OF_RANGE(xy1->bluex, xy2->bluex, delta) || + PNG_OUT_OF_RANGE(xy1->bluey, xy2->bluey, delta)); +} + +/* Added in libpng-1.6.0, a different check for the validity of a set of cHRM + * chunk chromaticities. Earlier checks used to simply look for the overflow + * condition (where the determinant of the matrix to solve for XYZ ends up zero + * because the chromaticity values are not all distinct.) Despite this it is + * theoretically possible to produce chromaticities that are apparently valid + * but that rapidly degrade to invalid, potentially crashing, sets because of + * arithmetic inaccuracies when calculations are performed on them. The new + * check is to round-trip xy -> XYZ -> xy and then check that the result is + * within a small percentage of the original. + */ +static int +png_colorspace_check_xy(png_XYZ *XYZ, const png_xy *xy) +{ + int result; + png_xy xyTest; + + /* As a side-effect this routine also returns the XYZ endpoints. */ + result = png_XYZ_from_xy(XYZ, xy); + if (result) return result; + + result = png_xy_from_XYZ(&xyTest, XYZ); + if (result) return result; + + if (png_colorspace_endpoints_match(xy, &xyTest, + 5/*actually, the math is pretty accurate*/)) + return 0; + + /* Too much slip */ + return 1; +} + +/* This is the check going the other way. The XYZ is modified to normalize it + * (another side-effect) and the xy chromaticities are returned. + */ +static int +png_colorspace_check_XYZ(png_xy *xy, png_XYZ *XYZ) +{ + int result; + png_XYZ XYZtemp; + + result = png_XYZ_normalize(XYZ); + if (result) return result; + + result = png_xy_from_XYZ(xy, XYZ); + if (result) return result; + + XYZtemp = *XYZ; + return png_colorspace_check_xy(&XYZtemp, xy); +} + +/* Used to check for an endpoint match against sRGB */ +static const png_xy sRGB_xy = /* From ITU-R BT.709-3 */ +{ + /* color x y */ + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000, + /* white */ 31270, 32900 +}; + +static int +png_colorspace_set_xy_and_XYZ(png_const_structrp png_ptr, + png_colorspacerp colorspace, const png_xy *xy, const png_XYZ *XYZ, + int preferred) +{ + if (colorspace->flags & PNG_COLORSPACE_INVALID) + return 0; + + /* The consistency check is performed on the chromaticities; this factors out + * variations because of the normalization (or not) of the end point Y + * values. + */ + if (preferred < 2 && (colorspace->flags & PNG_COLORSPACE_HAVE_ENDPOINTS)) + { + /* The end points must be reasonably close to any we already have. The + * following allows an error of up to +/-1% + */ + if (!png_colorspace_endpoints_match(xy, &colorspace->end_points_xy, 1000)) + { + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_benign_error(png_ptr, "inconsistent chromaticities"); + return 0; /* failed */ + } + + /* Only overwrite with preferred values */ + if (!preferred) + return 1; /* ok, but no change */ + } + + colorspace->end_points_xy = *xy; + colorspace->end_points_XYZ = *XYZ; + colorspace->flags |= PNG_COLORSPACE_HAVE_ENDPOINTS; + + /* TODO: 4000 is 0.04, and this is sufficient to accomodate the difference + * between the adapted D50 white point and the original D65 one. Is this + * necessary? + */ + if (png_colorspace_endpoints_match(xy, &sRGB_xy, 4000)) + colorspace->flags |= PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB; + + else + colorspace->flags &= 0xff ^ PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB; + + return 2; /* ok and changed */ +} + +int /* PRIVATE */ +png_colorspace_set_chromaticities(png_const_structrp png_ptr, + png_colorspacerp colorspace, const png_xy *xy, int preferred) +{ + /* We must check the end points to ensure they are reasonable - in the past + * color management systems have crashed as a result of getting bogus + * colorant values, while this isn't the fault of libpng it is the + * responsibility of libpng because PNG carries the bomb and libpng is in a + * position to protect against it. + */ + png_XYZ XYZ; + + switch (png_colorspace_check_xy(&XYZ, xy)) + { + case 0: /* success */ + return png_colorspace_set_xy_and_XYZ(png_ptr, colorspace, xy, &XYZ, + preferred); + + case 1: + /* We can't invert the chromaticities so we can't produce value XYZ + * values. Likely as not a color management system will fail too. + */ + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_benign_error(png_ptr, "invalid chromaticities"); + break; + + default: + /* libpng is broken; this should be a warning but if it happens we + * want error reports so for the moment it is an error. + */ + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_error(png_ptr, "internal error checking chromaticities"); + break; + } + + return 0; /* failed */ +} + +int /* PRIVATE */ +png_colorspace_set_endpoints(png_const_structrp png_ptr, + png_colorspacerp colorspace, const png_XYZ *XYZIn, int preferred) +{ + png_XYZ XYZ = *XYZIn; + png_xy xy; + + switch (png_colorspace_check_XYZ(&xy, &XYZ)) + { + case 0: + return png_colorspace_set_xy_and_XYZ(png_ptr, colorspace, &xy, &XYZ, + preferred); + + case 1: + /* End points are invalid. */ + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_benign_error(png_ptr, "invalid end points"); + break; + + default: + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_error(png_ptr, "internal error checking chromaticities"); + break; + } + + return 0; /* failed */ +} + +#if defined PNG_sRGB_SUPPORTED || defined PNG_iCCP_SUPPORTED +static int +profile_error(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_alloc_size_t value, png_const_charp reason) +{ + size_t pos; + char message[256]; + + if (colorspace != NULL) + colorspace->flags |= PNG_COLORSPACE_INVALID; + + pos = png_safecat(message, sizeof message, 0, "profile '"); + pos = png_safecat(message, pos+79, pos, name); + pos = png_safecat(message, sizeof message, pos, "': "); +# ifdef PNG_WARNINGS_SUPPORTED + { + char number[PNG_NUMBER_BUFFER_SIZE]; + + pos = png_safecat(message, sizeof message, pos, + png_format_number(number, number+(sizeof number), + PNG_NUMBER_FORMAT_x, value)); + } + pos = png_safecat(message, sizeof message, pos, ": "); +# endif + pos = png_safecat(message, sizeof message, pos, reason); + + if (colorspace != NULL) + { + if (png_ptr->mode & PNG_IS_READ_STRUCT) + png_chunk_benign_error(png_ptr, message); + + else + png_app_error(png_ptr, message); + } + +# ifdef PNG_WARNINGS_SUPPORTED + else + { + if (png_ptr->mode & PNG_IS_READ_STRUCT) + png_chunk_warning(png_ptr, message); - /* Overflow is possible here and it indicates an extreme set of PNG cHRM - * chunk values. This calculation actually returns the reciprocal of the - * scale value because this allows us to delay the multiplication of white-y - * into the denominator, which tends to produce a small number. + else + png_warning(png_ptr, message); + } +# endif + + return 0; +} + +static int /* PRIVATE */ +png_colorspace_set_profile(png_const_structrp png_ptr, png_const_charp name, + png_colorspacerp colorspace, png_fixed_point gAMA, const png_xy *xy, + const png_XYZ *XYZ, int intent, int preferred) +{ + int write_intent, write_gamma, result; + + if (colorspace->flags & PNG_COLORSPACE_INVALID) + return 0; + + /* Similar to the above routines, but ensure that both the gamma and the + * end-points are checked before doing any assignment. */ - if (!png_muldiv(&red_inverse, xy.whitey, denominator, left-right) || - red_inverse <= xy.whitey /* r+g+b scales = white scale */) - return 1; + if (preferred < 2 && (colorspace->flags & PNG_COLORSPACE_HAVE_INTENT)) + { + if (colorspace->rendering_intent != intent) + return profile_error(png_ptr, colorspace, name, (unsigned)intent, + "inconsistent rendering intents"); - /* Similarly for green_inverse: */ - if (!png_muldiv(&left, xy.redy-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; - if (!png_muldiv(&right, xy.redx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; - if (!png_muldiv(&green_inverse, xy.whitey, denominator, left-right) || - green_inverse <= xy.whitey) - return 1; + write_intent = 0; /* Ok, don't change */ + } - /* And the blue scale, the checks above guarantee this can't overflow but it - * can still produce 0 for extreme cHRM values. + else + write_intent = 1; /* Needs to be written */ + + switch (png_colorspace_check_gamma(png_ptr, colorspace, gAMA, preferred)) + { + case 2: + write_gamma = 1; + break; + + case 1: + write_gamma = 0; /* current value ok and preferred */ + break; + + default: /* error */ + return 0; + } + + /* Everything seems ok up to this point, update the endpoints and, if this + * works, do the gamma and intent too. */ - blue_scale = png_reciprocal(xy.whitey) - png_reciprocal(red_inverse) - - png_reciprocal(green_inverse); - if (blue_scale <= 0) return 1; + result = png_colorspace_set_xy_and_XYZ(png_ptr, colorspace, xy, XYZ, + preferred); + + switch (result) + { + case 2: /* ok, changed */ + case 1: /* ok, no end-point change */ + if (write_intent) + { + /* The value of intent must be checked in the caller; bugs in GCC + * force 'int' to be used as the parameter type. + */ + colorspace->rendering_intent = (png_uint_16)intent; + colorspace->flags |= PNG_COLORSPACE_HAVE_INTENT; + result = 2; + } + if (write_gamma) + { + colorspace->gamma = gAMA; + colorspace->flags |= PNG_COLORSPACE_HAVE_GAMMA; + result = 2; + } + + return result; + + default: /* failure */ + return 0; + } +} +#endif /* sRGB || iCCP */ + +#ifdef PNG_sRGB_SUPPORTED +int /* PRIVATE */ +png_colorspace_set_sRGB(png_const_structrp png_ptr, png_colorspacerp colorspace, + int intent, int preferred) +{ + /* sRGB sets known gamma, end points and (from the chunk) intent. */ + /* IMPORTANT: these are not necessarily the values found in an ICC profile + * because ICC profiles assume a D50 environment and therefore use XYZ values + * appropriate to a D50 environment. Perhaps we should too; it's just + * slightly weird because the chromaticities of the adapted colorants don't + * match the above values. + */ + static const png_XYZ sRGB_XYZ = /* D65 XYZ (*not* the D50 adapted values!) */ + { + /* color X Y Z */ + /* red */ 41239, 21264, 1933, + /* green */ 35758, 71517, 11919, + /* blue */ 18048, 7219, 95053 + }; + + int result; + + /* The above XYZ values, which are accurate to 5dp, produce rgb to gray + * coefficients of (6968,23435,2366), which are reduced (because they add up + * to 32769 not 32768) to (6968,23434,2366). These are the values that + * libpng has traditionally used (and are the best values given the 15bit + * algorithm used by the rgb to gray code.) + */ + if (intent < 0 || intent >= PNG_sRGB_INTENT_LAST) + return profile_error(png_ptr, colorspace, "sRGB", (unsigned)intent, + "invalid sRGB rendering intent"); + + result = png_colorspace_set_profile(png_ptr, "sRGB", colorspace, + PNG_GAMMA_sRGB_INVERSE, &sRGB_xy, &sRGB_XYZ, intent, preferred); + + /* The implicit profile is the sRGB one, so: */ + if (result) + colorspace->flags |= PNG_COLORSPACE_MATCHES_sRGB; + + return result; +} +#endif /* sRGB */ + +#ifdef PNG_iCCP_SUPPORTED +int /* PRIVATE */ +png_icc_check_length(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_uint_32 profile_length) +{ + if (profile_length < 132) + return profile_error(png_ptr, colorspace, name, profile_length, + "too short"); + + if (profile_length & 3) + return profile_error(png_ptr, colorspace, name, profile_length, + "invalid length"); - /* And fill in the png_XYZ: */ - if (!png_muldiv(&XYZ->redX, xy.redx, PNG_FP_1, red_inverse)) return 1; - if (!png_muldiv(&XYZ->redY, xy.redy, PNG_FP_1, red_inverse)) return 1; - if (!png_muldiv(&XYZ->redZ, PNG_FP_1 - xy.redx - xy.redy, PNG_FP_1, - red_inverse)) return 1; +} + +int /* PRIVATE */ +png_icc_check_header(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_uint_32 profile_length, + png_const_bytep profile/* first 132 bytes only */) +{ + png_uint_32 temp; + + /* Length checks (can't be ignored) */ + temp = png_get_uint_32(profile); + if (temp != profile_length) + return profile_error(png_ptr, colorspace, name, temp, + "length does not match profile"); + + temp = png_get_uint_32(profile+128); /* tag count: 12 bytes/tag */ + if (temp > 357913930 || /* (2^32-4-132)/12: maxium possible tag count */ + profile_length < 132+12*temp) /* truncated tag table */ + return profile_error(png_ptr, colorspace, name, temp, + "tag count too large"); + + /* The 'intent' must be valid or we can't store it, ICC limits the intent to + * 16 bits. + */ + temp = png_get_uint_32(profile+64); + if (temp >= 0xffff) /* The ICC limit */ + return profile_error(png_ptr, colorspace, name, temp, + "invalid rendering intent"); + + /* This is just a warning because the profile may be valid in future + * versions. + */ + if (temp >= PNG_sRGB_INTENT_LAST) + (void)profile_error(png_ptr, NULL, name, temp, + "intent outside defined range"); + + /* At this point the tag table can't be checked because it hasn't necessarily + * been loaded; however, various header fields can be checked. These checks + * are for values permitted by the PNG spec in an ICC profile; the PNG spec + * restricts the profiles that can be passed in an iCCP chunk (they must be + * appropriate to processing PNG data!) + */ + + /* Data checks (could be skipped). These checks must be independent of the + * version number; however, the version number doesn't accomodate changes in + * the header fields (just the known tags and the interpretation of the + * data.) + */ + temp = png_get_uint_32(profile+36); /* signature 'ascp' */ + if (temp != 0x61637370) + return profile_error(png_ptr, colorspace, name, temp, + "invalid signature"); + + /* The PNG spec requires this: + * "If the iCCP chunk is present, the image samples conform to the colour + * space represented by the embedded ICC profile as defined by the + * International Color Consortium [ICC]. The colour space of the ICC profile + * shall be an RGB colour space for colour images (PNG colour types 2, 3, and + * 6), or a greyscale colour space for greyscale images (PNG colour types 0 + * and 4)." + * + * This code does not check the color type because png_set_iCCP may be called + * before png_set_IHDR on write and because, anyway, the PNG spec is + * fundamentally flawed: RGB profiles can be used quite meaningfully for + * grayscale images and both RGB and palette images might only have gray + * colors in them, so gray profiles may be appropriate. + */ + temp = png_get_uint_32(profile+16); /* data colour space field */ + if (temp != 0x52474220 /* 'RGB ' */ && temp != 0x47524159 /* 'GRAY' */) + return profile_error(png_ptr, colorspace, name, temp, + "invalid color space"); + + /* It is up to the application to check that the profile class matches the + * application requirements; the spec provides no guidance, but it's pretty + * weird if the profile is not scanner ('scnr'), monitor ('mntr'), printer + * ('prtr') or 'spac' (for generic color spaces). Issue a warning in these + * cases. + */ + temp = png_get_uint_32(profile+12); /* profile/device class */ + if (temp != 0x73636E72 /* 'scnr' */ && temp != 0x6D6E7472 /* 'mntr' */ && + temp != 0x70727472 /* 'prtr' */ && temp != 0x73706163 /* 'spac' */) + (void)profile_error(png_ptr, NULL, name, temp, "unexpected class"); - if (!png_muldiv(&XYZ->greenX, xy.greenx, PNG_FP_1, green_inverse)) return 1; - if (!png_muldiv(&XYZ->greenY, xy.greeny, PNG_FP_1, green_inverse)) return 1; - if (!png_muldiv(&XYZ->greenZ, PNG_FP_1 - xy.greenx - xy.greeny, PNG_FP_1, - green_inverse)) return 1; +} + +int /* PRIVATE */ +png_icc_check_tag_table(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_uint_32 profile_length, + png_const_bytep profile /* header plus whole tag table */) +{ + png_uint_32 tag_count = png_get_uint_32(profile+128); + png_uint_32 itag; + png_const_bytep tag = profile+132; /* The first tag */ + + for (itag=0; itag < tag_count; ++itag, tag += 12) + { + png_uint_32 tag_id = png_get_uint_32(tag+0); + png_uint_32 tag_start = png_get_uint_32(tag+4); /* must be aligned */ + png_uint_32 tag_length = png_get_uint_32(tag+8);/* not padded */ + + /* The ICC specification does not exclude zero length tags, therefore the + * start might actually be anywhere if there is no data, but this would be + * a clear abuse of the intent of the standard so the start is checked for + * being in range. + */ + if ((tag_start & 3) != 0 || tag_start > profile_length || + tag_length > profile_length - tag_start) + return profile_error(png_ptr, colorspace, name, tag_id, + "tag data outside profile"); + } - if (!png_muldiv(&XYZ->blueX, xy.bluex, blue_scale, PNG_FP_1)) return 1; - if (!png_muldiv(&XYZ->blueY, xy.bluey, blue_scale, PNG_FP_1)) return 1; - if (!png_muldiv(&XYZ->blueZ, PNG_FP_1 - xy.bluex - xy.bluey, blue_scale, - PNG_FP_1)) return 1; +} - return 0; /*success*/ +#ifdef PNG_sRGB_SUPPORTED +/* Information about the known ICC sRGB profiles */ +static const struct +{ + png_uint_32 adler, crc, length; + png_uint_32 md5[4]; + png_uint_16 have_md5; + png_uint_16 intent; + +# define PNG_MD5(a,b,c,d) { a, b, c, d }, (a!=0)||(b!=0)||(c!=0)||(d!=0) +# define PNG_ICC_CHECKSUM(adler, crc, md5, intent, date, length, fname)\ + { adler, crc, length, md5, intent }, + +} png_sRGB_checks[] = +{ + /* This data comes from contrib/tools/checksum-icc run on downloads of + * all four ICC sRGB profiles from www.color.org. + */ + /* adler32, crc32, MD5[4], intent, date, length, file-name */ + PNG_ICC_CHECKSUM(0x0a3fd9f6, 0x3b8772b9, + PNG_MD5(0x29f83dde, 0xaff255ae, 0x7842fae4, 0xca83390d), 0, + "2009/03/27 21:36:31", 3048, "sRGB_IEC61966-2-1_black_scaled.icc") + + /* ICC sRGB v2 perceptual no black-compensation: */ + PNG_ICC_CHECKSUM(0x4909e5e1, 0x427ebb21, + PNG_MD5(0xc95bd637, 0xe95d8a3b, 0x0df38f99, 0xc1320389), 1, + "2009/03/27 21:37:45", 3052, "sRGB_IEC61966-2-1_no_black_scaling.icc") + + PNG_ICC_CHECKSUM(0xfd2144a1, 0x306fd8ae, + PNG_MD5(0xfc663378, 0x37e2886b, 0xfd72e983, 0x8228f1b8), 0, + "2009/08/10 17:28:01", 60988, "sRGB_v4_ICC_preference_displayclass.icc") + + /* ICC sRGB v4 perceptual */ + PNG_ICC_CHECKSUM(0x209c35d2, 0xbbef7812, + PNG_MD5(0x34562abf, 0x994ccd06, 0x6d2c5721, 0xd0d68c5d), 0, + "2007/07/25 00:05:37", 60960, "sRGB_v4_ICC_preference.icc") + + /* The following profiles have no known MD5 checksum. If there is a match + * on the (empty) MD5 the other fields are used to attempt a match and + * a warning is produced. The first two of these profiles have a 'cprt' tag + * which suggests that they were also made by Hewlett Packard. + */ + PNG_ICC_CHECKSUM(0xa054d762, 0x5d5129ce, + PNG_MD5(0x00000000, 0x00000000, 0x00000000, 0x00000000), 1, + "2004/07/21 18:57:42", 3024, "sRGB_IEC61966-2-1_noBPC.icc") + + PNG_ICC_CHECKSUM(0xf784f3fb, 0x182ea552, + PNG_MD5(0x00000000, 0x00000000, 0x00000000, 0x00000000), 0, + "1998/02/09 06:49:00", 3144, "sRGB Profile.icc") + + PNG_ICC_CHECKSUM(0x0398f3fcUL, 0xf29e526dUL, + PNG_MD5(0x00000000, 0x00000000, 0x00000000, 0x00000000), 1, + "1998/02/09 06:49:00", 3144, "HP-Microsoft sRGB v2 media-relative") +}; + +static int +png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr, + png_const_bytep profile, uLong adler) +{ + /* The quick check is to verify just the MD5 signature and trust the + * rest of the data. Because the profile has already been verified for + * correctness this is safe. png_colorspace_set_sRGB will check the 'intent' + * field too, so if the profile has been edited with an intent not defined + * by sRGB (but maybe defined by a later ICC specification) the read of + * the profile will fail at that point. + */ + png_uint_32 length = 0; + png_uint_32 intent = 0x10000; /* invalid */ +#if PNG_sRGB_PROFILE_CHECKS > 1 + uLong crc = 0; /* the value for 0 length data */ +#endif + unsigned int i; + + for (i=0; i < (sizeof png_sRGB_checks) / (sizeof png_sRGB_checks[0]); ++i) + { + if (png_get_uint_32(profile+84) == png_sRGB_checks[i].md5[0] && + png_get_uint_32(profile+88) == png_sRGB_checks[i].md5[1] && + png_get_uint_32(profile+92) == png_sRGB_checks[i].md5[2] && + png_get_uint_32(profile+96) == png_sRGB_checks[i].md5[3]) + { + /* This may be one of the old HP profiles without an MD5, in that + * case we can only use the length and Adler32 (note that these + * are not used by default if there is an MD5!) + */ +# if PNG_sRGB_PROFILE_CHECKS == 0 + if (png_sRGB_checks[i].have_md5) + return 1; +# endif + + /* Profile is unsigned or more checks have been configured in. */ + if (length == 0) + { + length = png_get_uint_32(profile); + intent = png_get_uint_32(profile+64); } -int png_XYZ_from_xy_checked(png_structp png_ptr, png_XYZ *XYZ, png_xy xy) + /* Length *and* intent must match */ + if (length == png_sRGB_checks[i].length && + intent == png_sRGB_checks[i].intent) { - switch (png_XYZ_from_xy(XYZ, xy)) + /* Now calculate the alder32 if not done already. */ + if (adler == 0) { - case 0: /* success */ - return 1; + adler = adler32(0, NULL, 0); + adler = adler32(adler, profile, length); + } - case 1: - /* The chunk may be technically valid, but we got png_fixed_point - * overflow while trying to get XYZ values out of it. This is - * entirely benign - the cHRM chunk is pretty extreme. + if (adler == png_sRGB_checks[i].adler) + { + /* These basic checks suggest that the data has not been + * modified, but if the check level is more than 1 perform + * our own crc32 checksum on the data. */ - png_warning(png_ptr, - "extreme cHRM chunk cannot be converted to tristimulus values"); - break; +# if PNG_sRGB_PROFILE_CHECKS > 1 + if (crc == 0) + { + crc = crc32(0, NULL, 0); + crc = crc32(crc, profile, length); + } - default: - /* libpng is broken; this should be a warning but if it happens we - * want error reports so for the moment it is an error. + /* So this check must pass for the 'return' below to happen. */ - png_error(png_ptr, "internal error in png_XYZ_from_xy"); - break; + if (crc == png_sRGB_checks[i].crc) +# endif + { + /* Warn that this being done; this isn't even an error since + * the profile is perfectly valid, but it would be nice if + * people used the up-to-date ones. + */ + if (!png_sRGB_checks[i].have_md5) + { +# ifdef PNG_READ_SUPPORTED + if (png_ptr->mode & PNG_IS_READ_STRUCT) + png_chunk_warning(png_ptr, + "out-of-date sRGB profile with no signature"); + else +# endif + png_app_warning(png_ptr, + "out-of-date sRGB profile with no signature"); + } + + return 1; + } + } + } + +# if PNG_sRGB_PROFILE_CHECKS > 0 + /* The signature matched, but the profile had been changed in some + * way. This is an apparent violation of the ICC terms of use and, + * anyway, the rejection may be unexpected. + */ + if (png_sRGB_checks[i].have_md5) + png_benign_error(png_ptr, + "copyright violation: edited ICC profile ignored"); +# endif + } + } + + return 0; /* no match */ +} +#endif + +int /* PRIVATE */ +png_icc_set_gAMA_and_cHRM(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, png_const_bytep profile, + uLong adler, int preferred) +{ +# ifdef PNG_sRGB_SUPPORTED + /* 1) Is this profile one of the known ICC sRGB profiles? If it is, just + * set the sRGB information. + */ + if (png_compare_ICC_profile_with_sRGB(png_ptr, profile, adler)) + return png_colorspace_set_sRGB(png_ptr, colorspace, + (int)/*already checked*/png_get_uint_32(profile+64), preferred); + + else +# endif + + /* 2) Attempt to extract the gAMA and cHRM information from non-sRGB + * profiles. + */ + { + /* TODO: implement this! */ + PNG_UNUSED(name) /* NYI */ + return 1; + } +} + +int /* PRIVATE */ +png_colorspace_set_ICC(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_uint_32 profile_length, + png_const_bytep profile, int preferred) +{ + if (colorspace->flags & PNG_COLORSPACE_INVALID) + return 0; + + if (png_icc_check_length(png_ptr, colorspace, name, profile_length) && + png_icc_check_header(png_ptr, colorspace, name, profile_length, profile) + && png_icc_check_tag_table(png_ptr, colorspace, name, profile_length, + profile)) + { + png_icc_set_gAMA_and_cHRM(png_ptr, colorspace, name, profile, 0, + preferred); + return 1; } - /* ERROR RETURN */ + /* Failure case */ return 0; } +#endif /* iCCP */ + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +void /* PRIVATE */ +png_colorspace_set_rgb_coefficients(png_structrp png_ptr) +{ + /* Set the rgb_to_gray coefficients from the colorspace. */ + if (!png_ptr->rgb_to_gray_coefficients_set && + (png_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) + { + /* png_set_background has not been called, get the coefficients from the Y + * values of the colorspace colorants. + */ + png_fixed_point r = png_ptr->colorspace.end_points_XYZ.redY; + png_fixed_point g = png_ptr->colorspace.end_points_XYZ.greenY; + png_fixed_point b = png_ptr->colorspace.end_points_XYZ.blueY; + png_fixed_point total = r+g+b; + + if (total > 0 && + r >= 0 && png_muldiv(&r, r, 32768, total) && r >= 0 && r <= 32768 && + g >= 0 && png_muldiv(&g, g, 32768, total) && g >= 0 && g <= 32768 && + b >= 0 && png_muldiv(&b, b, 32768, total) && b >= 0 && b <= 32768 && + r+g+b <= 32769) + { + /* We allow 0 coefficients here. r+g+b may be 32769 if two or + * all of the coefficients were rounded up. Handle this by + * reducing the *largest* coefficient by 1; this matches the + * approach used for the default coefficients in pngrtran.c + */ + int add = 0; + + if (r+g+b > 32768) + add = -1; + else if (r+g+b < 32768) + add = 1; + + if (add != 0) + { + if (g >= r && g >= b) + g += add; + else if (r >= g && r >= b) + r += add; + else + b += add; + } + + /* Check for an internal error. */ + if (r+g+b != 32768) + png_error(png_ptr, + "internal error handling cHRM coefficients"); + + else + { + png_ptr->rgb_to_gray_red_coeff = (png_uint_16)r; + png_ptr->rgb_to_gray_green_coeff = (png_uint_16)g; + } + } + + /* This is a png_error at present even though it could be ignored - + * it should never happen, but it is important that if it does, the + * bug is fixed. + */ + else + png_error(png_ptr, "internal error handling cHRM->XYZ"); + } +} #endif +#endif /* COLORSPACE */ + void /* PRIVATE */ -png_check_IHDR(png_structp png_ptr, +png_check_IHDR(png_const_structrp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type) { @@ -1466,9 +2554,9 @@ static double png_pow10(int power) { int recip = 0; - double d = 1.0; + double d = 1; /* Handle negative exponent with a reciprocal at the end because * 10 is exact whereas .1 is inexact in base 2 */ @@ -1480,9 +2568,9 @@ if (power > 0) { /* Decompose power bitwise. */ - double mult = 10.0; + double mult = 10; do { if (power & 1) d *= mult; mult *= mult; @@ -1500,9 +2588,9 @@ /* Function to format a floating point value in ASCII with a given * precision. */ void /* PRIVATE */ -png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, +png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size, double fp, unsigned int precision) { /* We use standard functions from math.h, but not printf because * that would require stdio. The caller must supply a buffer of @@ -1599,10 +2687,9 @@ do { double d; - fp *= 10.0; - + fp *= 10; /* Use modf here, not floor and subtract, so that * the separation is done in one step. At the end * of the loop don't break the number into parts so * that the final digit is rounded. @@ -1613,9 +2700,9 @@ else { d = floor(fp + .5); - if (d > 9.0) + if (d > 9) { /* Rounding up to 10, handle that here. */ if (czero > 0) { @@ -1621,12 +2708,11 @@ { --czero, d = 1; if (cdigits == 0) --clead; } - else { - while (cdigits > 0 && d > 9.0) + while (cdigits > 0 && d > 9) { int ch = *--ascii; if (exp_b10 != (-1)) @@ -1649,9 +2735,9 @@ /* Did we reach the beginning? If so adjust the * exponent but take into account the leading * decimal point. */ - if (d > 9.0) /* cdigits == 0 */ + if (d > 9) /* cdigits == 0 */ { if (exp_b10 == (-1)) { /* Leading decimal point (plus zeros?), if @@ -1670,16 +2756,16 @@ else ++exp_b10; /* In all cases we output a '1' */ - d = 1.0; + d = 1; } } } fp = 0; /* Guarantees termination below. */ } - if (d == 0.0) + if (d == 0) { ++czero; if (cdigits == 0) ++clead; } @@ -1818,10 +2902,10 @@ # ifdef PNG_FIXED_POINT_SUPPORTED /* Function to format a fixed point value in ASCII. */ void /* PRIVATE */ -png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, - png_fixed_point fp) +png_ascii_from_fixed(png_const_structrp png_ptr, png_charp ascii, + png_size_t size, png_fixed_point fp) { /* Require space for 10 decimal digits, a decimal point, a minus sign and a * trailing \0, 13 characters: */ @@ -1891,9 +2975,9 @@ #if defined(PNG_FLOATING_POINT_SUPPORTED) && \ !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) png_fixed_point -png_fixed(png_structp png_ptr, double fp, png_const_charp text) +png_fixed(png_const_structrp png_ptr, double fp, png_const_charp text) { double r = floor(100000 * fp + .5); if (r > 2147483647. || r < -2147483648.) @@ -2030,9 +3114,9 @@ /* The following is for when the caller doesn't much care about the * result. */ png_fixed_point -png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times, +png_muldiv_warn(png_const_structrp png_ptr, png_fixed_point a, png_int_32 times, png_int_32 divisor) { png_fixed_point result; @@ -2043,9 +3127,9 @@ return 0; } #endif -#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gammma */ +#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gamma */ /* Calculate a reciprocal, return 0 on div-by-zero or overflow. */ png_fixed_point png_reciprocal(png_fixed_point a) { @@ -2113,56 +3197,15 @@ return 0; /* overflow */ } #endif /* READ_GAMMA */ -#ifdef PNG_CHECK_cHRM_SUPPORTED -/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2, - * 2010: moved from pngset.c) */ -/* - * Multiply two 32-bit numbers, V1 and V2, using 32-bit - * arithmetic, to produce a 64-bit result in the HI/LO words. - * - * A B - * x C D - * ------ - * AD || BD - * AC || CB || 0 - * - * where A and B are the high and low 16-bit words of V1, - * C and D are the 16-bit words of V2, AD is the product of - * A and D, and X || Y is (X << 16) + Y. -*/ - -void /* PRIVATE */ -png_64bit_product (long v1, long v2, unsigned long *hi_product, - unsigned long *lo_product) -{ - int a, b, c, d; - long lo, hi, x, y; - - a = (v1 >> 16) & 0xffff; - b = v1 & 0xffff; - c = (v2 >> 16) & 0xffff; - d = v2 & 0xffff; - - lo = b * d; /* BD */ - x = a * d + c * b; /* AD + CB */ - y = ((lo >> 16) & 0xffff) + x; - - lo = (lo & 0xffff) | ((y & 0xffff) << 16); - hi = (y >> 16) & 0xffff; - - hi += a * c; /* AC */ - - *hi_product = (unsigned long)hi; - *lo_product = (unsigned long)lo; -} -#endif /* CHECK_cHRM */ - #ifdef PNG_READ_GAMMA_SUPPORTED /* gamma table code */ #ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED /* Fixed point gamma. * + * The code to calculate the tables used below can be found in the shell script + * contrib/tools/intgamma.sh + * * To calculate gamma this code implements fast log() and exp() calls using only * fixed point arithmetic. This code has sufficient precision for either 8-bit * or 16-bit sample values. * @@ -2174,14 +3217,11 @@ * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to * 255, so it's the base 2 logarithm of a normalized 8-bit floating point * mantissa. The numbers are 32-bit fractions. */ -static png_uint_32 +static const png_uint_32 png_8bit_l2[128] = { -# ifdef PNG_DO_BC - for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; } -# else 4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U, 3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U, 3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U, 3455425220U, 3413129301U, 3371120137U, 3329393864U, 3287946700U, 3246774933U, @@ -2202,9 +3242,8 @@ 479792461U, 453592303U, 427502463U, 401522014U, 375650043U, 349885648U, 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U, 172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U, 24347096U, 0U -# endif #if 0 /* The following are the values for 16-bit tables - these work fine for the * 8-bit conversions but produce very slightly larger errors in the 16-bit @@ -2338,31 +3377,27 @@ * each case only the low 16 bits are relevant - the fraction - since the * integer bits (the top 4) simply determine a shift. * * The worst case is the 16-bit distinction between 65535 and 65534, this - * requires perhaps spurious accuracy in the decoding of the logarithm to + * requires perhaps spurious accuracty in the decoding of the logarithm to * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance * of getting this accuracy in practice. * * To deal with this the following exp() function works out the exponent of the * frational part of the logarithm by using an accurate 32-bit value from the * top four fractional bits then multiplying in the remaining bits. */ -static png_uint_32 +static const png_uint_32 png_32bit_exp[16] = { -# ifdef PNG_DO_BC - for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; } -# else /* NOTE: the first entry is deliberately set to the maximum 32-bit value. */ 4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U, 3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U, 2553802834U, 2445529972U, 2341847524U, 2242560872U -# endif }; /* Adjustment table; provided to explain the numbers in the code below. */ -#ifdef PNG_DO_BC +#if 0 for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"} 11 44937.64284865548751208448 10 45180.98734845585101160448 9 45303.31936980687359311872 @@ -2502,9 +3537,9 @@ * is nominally a 16-bit value if bit depth is 8 then the result is * 8-bit (as are the arguments.) */ png_uint_16 /* PRIVATE */ -png_gamma_correct(png_structp png_ptr, unsigned int value, +png_gamma_correct(png_structrp png_ptr, unsigned int value, png_fixed_point gamma_val) { if (png_ptr->bit_depth == 8) return png_gamma_8bit_correct(value, gamma_val); @@ -2523,17 +3558,17 @@ gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED; } /* Internal function to build a single 16-bit table - the table consists of - * 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount + * 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount * to shift the input values right (or 16-number_of_signifiant_bits). * * The caller is responsible for ensuring that the table gets cleaned up on * png_error (i.e. if one of the mallocs below fails) - i.e. the *table argument * should be somewhere that will be cleaned. */ static void -png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable, +png_build_16bit_table(png_structrp png_ptr, png_uint_16pp *ptable, PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) { /* Various values derived from 'shift': */ PNG_CONST unsigned int num = 1U << (8U - shift); @@ -2599,9 +3634,9 @@ /* NOTE: this function expects the *inverse* of the overall gamma transformation * required. */ static void -png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, +png_build_16to8_table(png_structrp png_ptr, png_uint_16pp *ptable, PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) { PNG_CONST unsigned int num = 1U << (8U - shift); PNG_CONST unsigned int max = (1U << (16U - shift))-1U; @@ -2610,11 +3645,11 @@ png_uint_16pp table = *ptable = (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); - /* 'num' is the number of tables and also the number of low bits of the - * input 16-bit value used to select a table. Each table is itself indexed - * by the high 8 bits of the value. + /* 'num' is the number of tables and also the number of low bits of low + * bits of the input 16-bit value used to select a table. Each table is + * itself index by the high 8 bits of the value. */ for (i = 0; i < num; i++) table[i] = (png_uint_16p)png_malloc(png_ptr, 256 * png_sizeof(png_uint_16)); @@ -2663,12 +3698,12 @@ } /* Build a single 8-bit table: same as the 16-bit case but much simpler (and * typically much faster). Note that libpng currently does no sBIT processing - * (apparently contrary to the spec) so a 256-entry table is always generated. + * (apparently contrary to the spec) so a 256 entry table is always generated. */ static void -png_build_8bit_table(png_structp png_ptr, png_bytepp ptable, +png_build_8bit_table(png_structrp png_ptr, png_bytepp ptable, PNG_CONST png_fixed_point gamma_val) { unsigned int i; png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256); @@ -2683,9 +3718,9 @@ /* Used from png_read_destroy and below to release the memory used by the gamma * tables. */ void /* PRIVATE */ -png_destroy_gamma_table(png_structp png_ptr) +png_destroy_gamma_table(png_structrp png_ptr) { png_free(png_ptr, png_ptr->gamma_table); png_ptr->gamma_table = NULL; @@ -2739,9 +3774,9 @@ * the future. Note also how the gamma_16 tables are segmented so that * we don't need to allocate > 64K chunks for a full 16-bit table. */ void /* PRIVATE */ -png_build_gamma_table(png_structp png_ptr, int bit_depth) +png_build_gamma_table(png_structrp png_ptr, int bit_depth) { png_debug(1, "in png_build_gamma_table"); /* Remove any existing table; this copes with multiple calls to @@ -2758,22 +3793,22 @@ if (bit_depth <= 8) { png_build_8bit_table(png_ptr, &png_ptr->gamma_table, - png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->colorspace.gamma, png_ptr->screen_gamma) : PNG_FP_1); #if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) { png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1, - png_reciprocal(png_ptr->gamma)); + png_reciprocal(png_ptr->colorspace.gamma)); png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1, png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : - png_ptr->gamma/* Probably doing rgb_to_gray */); + png_ptr->colorspace.gamma/* Probably doing rgb_to_gray */); } #endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ } else @@ -2799,9 +3834,9 @@ * * Where 'iv' is the input color value and 'ov' is the output value - * pow(iv, gamma). * - * Thus the gamma table consists of up to 256 256-entry tables. The table + * Thus the gamma table consists of up to 256 256 entry tables. The table * is selected by the (8-gamma_shift) most significant of the low 8 bits of * the color value then indexed by the upper 8 bits: * * table[low bits][high 8 bits] @@ -2840,15 +3875,15 @@ */ if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) #endif png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift, - png_ptr->screen_gamma > 0 ? png_product2(png_ptr->gamma, + png_ptr->screen_gamma > 0 ? png_product2(png_ptr->colorspace.gamma, png_ptr->screen_gamma) : PNG_FP_1); #ifdef PNG_16BIT_SUPPORTED else png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift, - png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->colorspace.gamma, png_ptr->screen_gamma) : PNG_FP_1); #endif #if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ @@ -2856,19 +3891,279 @@ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) { png_build_16bit_table(png_ptr, &png_ptr->gamma_16_to_1, shift, - png_reciprocal(png_ptr->gamma)); + png_reciprocal(png_ptr->colorspace.gamma)); /* Notice that the '16 from 1' table should be full precision, however * the lookup on this table still uses gamma_shift, so it can't be. * TODO: fix this. */ png_build_16bit_table(png_ptr, &png_ptr->gamma_16_from_1, shift, png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : - png_ptr->gamma/* Probably doing rgb_to_gray */); + png_ptr->colorspace.gamma/* Probably doing rgb_to_gray */); } #endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ } } #endif /* READ_GAMMA */ + +/* sRGB support */ +#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ + defined PNG_SIMPLIFIED_WRITE_SUPPORTED +/* sRGB conversion tables; these are machine generated with the code in + * contrib/tools/makesRGB.c. The actual sRGB transfer curve defined in the + * specification (see the article at http://en.wikipedia.org/wiki/SRGB) + * is used, not the gamma=1/2.2 approximation use elsewhere in libpng. + * The sRGB to linear table is exact (to the nearest 16 bit linear fraction). + * The inverse (linear to sRGB) table has accuracies as follows: + * + * For all possible (255*65535+1) input values: + * + * error: -0.515566 - 0.625971, 79441 (0.475369%) of readings inexact + * + * For the input values corresponding to the 65536 16-bit values: + * + * error: -0.513727 - 0.607759, 308 (0.469978%) of readings inexact + * + * In all cases the inexact readings are off by one. + */ + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +/* The convert-to-sRGB table is only currently required for read. */ +const png_uint_16 png_sRGB_table[256] = +{ + 0,20,40,60,80,99,119,139, + 159,179,199,219,241,264,288,313, + 340,367,396,427,458,491,526,562, + 599,637,677,718,761,805,851,898, + 947,997,1048,1101,1156,1212,1270,1330, + 1391,1453,1517,1583,1651,1720,1790,1863, + 1937,2013,2090,2170,2250,2333,2418,2504, + 2592,2681,2773,2866,2961,3058,3157,3258, + 3360,3464,3570,3678,3788,3900,4014,4129, + 4247,4366,4488,4611,4736,4864,4993,5124, + 5257,5392,5530,5669,5810,5953,6099,6246, + 6395,6547,6700,6856,7014,7174,7335,7500, + 7666,7834,8004,8177,8352,8528,8708,8889, + 9072,9258,9445,9635,9828,10022,10219,10417, + 10619,10822,11028,11235,11446,11658,11873,12090, + 12309,12530,12754,12980,13209,13440,13673,13909, + 14146,14387,14629,14874,15122,15371,15623,15878, + 16135,16394,16656,16920,17187,17456,17727,18001, + 18277,18556,18837,19121,19407,19696,19987,20281, + 20577,20876,21177,21481,21787,22096,22407,22721, + 23038,23357,23678,24002,24329,24658,24990,25325, + 25662,26001,26344,26688,27036,27386,27739,28094, + 28452,28813,29176,29542,29911,30282,30656,31033, + 31412,31794,32179,32567,32957,33350,33745,34143, + 34544,34948,35355,35764,36176,36591,37008,37429, + 37852,38278,38706,39138,39572,40009,40449,40891, + 41337,41785,42236,42690,43147,43606,44069,44534, + 45002,45473,45947,46423,46903,47385,47871,48359, + 48850,49344,49841,50341,50844,51349,51858,52369, + 52884,53401,53921,54445,54971,55500,56032,56567, + 57105,57646,58190,58737,59287,59840,60396,60955, + 61517,62082,62650,63221,63795,64372,64952,65535 +}; + +#endif /* simplified read only */ + +/* The base/delta tables are required for both read and write (but currently + * only the simplified versions.) + */ +const png_uint_16 png_sRGB_base[512] = +{ + 128,1782,3383,4644,5675,6564,7357,8074, + 8732,9346,9921,10463,10977,11466,11935,12384, + 12816,13233,13634,14024,14402,14769,15125,15473, + 15812,16142,16466,16781,17090,17393,17690,17981, + 18266,18546,18822,19093,19359,19621,19879,20133, + 20383,20630,20873,21113,21349,21583,21813,22041, + 22265,22487,22707,22923,23138,23350,23559,23767, + 23972,24175,24376,24575,24772,24967,25160,25352, + 25542,25730,25916,26101,26284,26465,26645,26823, + 27000,27176,27350,27523,27695,27865,28034,28201, + 28368,28533,28697,28860,29021,29182,29341,29500, + 29657,29813,29969,30123,30276,30429,30580,30730, + 30880,31028,31176,31323,31469,31614,31758,31902, + 32045,32186,32327,32468,32607,32746,32884,33021, + 33158,33294,33429,33564,33697,33831,33963,34095, + 34226,34357,34486,34616,34744,34873,35000,35127, + 35253,35379,35504,35629,35753,35876,35999,36122, + 36244,36365,36486,36606,36726,36845,36964,37083, + 37201,37318,37435,37551,37668,37783,37898,38013, + 38127,38241,38354,38467,38580,38692,38803,38915, + 39026,39136,39246,39356,39465,39574,39682,39790, + 39898,40005,40112,40219,40325,40431,40537,40642, + 40747,40851,40955,41059,41163,41266,41369,41471, + 41573,41675,41777,41878,41979,42079,42179,42279, + 42379,42478,42577,42676,42775,42873,42971,43068, + 43165,43262,43359,43456,43552,43648,43743,43839, + 43934,44028,44123,44217,44311,44405,44499,44592, + 44685,44778,44870,44962,45054,45146,45238,45329, + 45420,45511,45601,45692,45782,45872,45961,46051, + 46140,46229,46318,46406,46494,46583,46670,46758, + 46846,46933,47020,47107,47193,47280,47366,47452, + 47538,47623,47709,47794,47879,47964,48048,48133, + 48217,48301,48385,48468,48552,48635,48718,48801, + 48884,48966,49048,49131,49213,49294,49376,49458, + 49539,49620,49701,49782,49862,49943,50023,50103, + 50183,50263,50342,50422,50501,50580,50659,50738, + 50816,50895,50973,51051,51129,51207,51285,51362, + 51439,51517,51594,51671,51747,51824,51900,51977, + 52053,52129,52205,52280,52356,52432,52507,52582, + 52657,52732,52807,52881,52956,53030,53104,53178, + 53252,53326,53400,53473,53546,53620,53693,53766, + 53839,53911,53984,54056,54129,54201,54273,54345, + 54417,54489,54560,54632,54703,54774,54845,54916, + 54987,55058,55129,55199,55269,55340,55410,55480, + 55550,55620,55689,55759,55828,55898,55967,56036, + 56105,56174,56243,56311,56380,56448,56517,56585, + 56653,56721,56789,56857,56924,56992,57059,57127, + 57194,57261,57328,57395,57462,57529,57595,57662, + 57728,57795,57861,57927,57993,58059,58125,58191, + 58256,58322,58387,58453,58518,58583,58648,58713, + 58778,58843,58908,58972,59037,59101,59165,59230, + 59294,59358,59422,59486,59549,59613,59677,59740, + 59804,59867,59930,59993,60056,60119,60182,60245, + 60308,60370,60433,60495,60558,60620,60682,60744, + 60806,60868,60930,60992,61054,61115,61177,61238, + 61300,61361,61422,61483,61544,61605,61666,61727, + 61788,61848,61909,61969,62030,62090,62150,62211, + 62271,62331,62391,62450,62510,62570,62630,62689, + 62749,62808,62867,62927,62986,63045,63104,63163, + 63222,63281,63340,63398,63457,63515,63574,63632, + 63691,63749,63807,63865,63923,63981,64039,64097, + 64155,64212,64270,64328,64385,64443,64500,64557, + 64614,64672,64729,64786,64843,64900,64956,65013, + 65070,65126,65183,65239,65296,65352,65409,65465 +}; + +const png_byte png_sRGB_delta[512] = +{ + 207,201,158,129,113,100,90,82,77,72,68,64,61,59,56,54, + 52,50,49,47,46,45,43,42,41,40,39,39,38,37,36,36, + 35,34,34,33,33,32,32,31,31,30,30,30,29,29,28,28, + 28,27,27,27,27,26,26,26,25,25,25,25,24,24,24,24, + 23,23,23,23,23,22,22,22,22,22,22,21,21,21,21,21, + 21,20,20,20,20,20,20,20,20,19,19,19,19,19,19,19, + 19,18,18,18,18,18,18,18,18,18,18,17,17,17,17,17, + 17,17,17,17,17,17,16,16,16,16,16,16,16,16,16,16, + 16,16,16,16,15,15,15,15,15,15,15,15,15,15,15,15, + 15,15,15,15,14,14,14,14,14,14,14,14,14,14,14,14, + 14,14,14,14,14,14,14,13,13,13,13,13,13,13,13,13, + 13,13,13,13,13,13,13,13,13,13,13,13,13,13,12,12, + 12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12, + 12,12,12,12,12,12,12,12,12,12,12,12,11,11,11,11, + 11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11, + 11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11, + 11,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10, + 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10, + 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10, + 10,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 +}; +#endif /* SIMPLIFIED READ/WRITE sRGB support */ + +/* SIMPLIFIED READ/WRITE SUPPORT */ +#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ + defined PNG_SIMPLIFIED_WRITE_SUPPORTED +static int +png_image_free_function(png_voidp argument) +{ + png_imagep image = png_voidcast(png_imagep, argument); + png_controlp cp = image->opaque; + png_control c; + + /* Double check that we have a png_ptr - it should be impossible to get here + * without one. + */ + if (cp->png_ptr == NULL) + return 0; + + /* First free any data held in the control structure. */ +# ifdef PNG_STDIO_SUPPORTED + if (cp->owned_file) + { + FILE *fp = png_voidcast(FILE*, cp->png_ptr->io_ptr); + cp->owned_file = 0; + + /* Ignore errors here. */ + if (fp != NULL) + { + cp->png_ptr->io_ptr = NULL; + (void)fclose(fp); + } + } +# endif + + /* Copy the control structure so that the original, allocated, version can be + * safely freed. Notice that a png_error here stops the remainder of the + * cleanup, but this is probably fine because that would indicate bad memory + * problems anyway. + */ + c = *cp; + image->opaque = &c; + png_free(c.png_ptr, cp); + + /* Then the structures, calling the correct API. */ + if (c.for_write) + { +# ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED + png_destroy_write_struct(&c.png_ptr, &c.info_ptr); +# else + png_error(c.png_ptr, "simplified write not supported"); +# endif + } + else + { +# ifdef PNG_SIMPLIFIED_READ_SUPPORTED + png_destroy_read_struct(&c.png_ptr, &c.info_ptr, NULL); +# else + png_error(c.png_ptr, "simplified read not supported"); +# endif + } + + /* Success. */ + return 1; +} + +void PNGAPI +png_image_free(png_imagep image) +{ + /* Safely call the real function, but only if doing so is safe at this point + * (if not inside an error handling context). Otherwise assume + * png_safe_execute will call this API after the return. + */ + if (image != NULL && image->opaque != NULL && + image->opaque->error_buf == NULL) + { + /* Ignore errors here: */ + (void)png_safe_execute(image, png_image_free_function, image); + image->opaque = NULL; + } +} + +int /* PRIVATE */ +png_image_error(png_imagep image, png_const_charp error_message) +{ + /* Utility to log an error. */ + png_safecat(image->message, sizeof image->message, 0, error_message); + image->warning_or_error |= PNG_IMAGE_ERROR; + png_image_free(image); + return 0; +} + +#endif /* SIMPLIFIED READ/WRITE */ #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ diff -ru4NwbB libpng-1.5.10/png.h libpng-1.6.0beta22/png.h --- libpng-1.5.10/png.h 2012-03-29 00:06:54.479097811 -0500 +++ libpng-1.6.0beta22/png.h 2012-05-23 12:30:56.039497638 -0500 @@ -165,16 +165,9 @@ * 1.5.6 15 10506 15.so.15.6[.0] * 1.5.7beta01-05 15 10507 15.so.15.7[.0] * 1.5.7rc01-03 15 10507 15.so.15.7[.0] * 1.5.7 15 10507 15.so.15.7[.0] - * 1.5.8beta01 15 10508 15.so.15.8[.0] - * 1.5.8rc01 15 10508 15.so.15.8[.0] - * 1.5.8 15 10508 15.so.15.8[.0] - * 1.5.9beta01-02 15 10509 15.so.15.9[.0] - * 1.5.9rc01 15 10509 15.so.15.9[.0] - * 1.5.9 15 10509 15.so.15.9[.0] - * 1.5.10beta01-05 15 10510 15.so.15.10[.0] - * 1.5.10 15 10510 15.so.15.10[.0] + * 1.6.0beta01-22 16 10600 16.so.16.0[.0] * * Henceforth the source version will match the shared-library major * and minor numbers; the shared-library major version number will be * used for changes in backward compatibility, as it is intended. The @@ -434,26 +427,8 @@ # include "pnglibconf.h" #endif #ifndef PNG_VERSION_INFO_ONLY -# ifndef PNG_BUILDING_SYMBOL_TABLE - /* - * Standard header files (not needed for the version info or while - * building symbol table -- see scripts/pnglibconf.dfa) - */ -# ifdef PNG_SETJMP_SUPPORTED -# include -# endif - - /* Need the time information for converting tIME chunks, it - * defines struct tm: - */ -# ifdef PNG_CONVERT_tIME_SUPPORTED - /* "time.h" functions are not supported on all operating systems */ -# include -# endif -# endif - /* Machine specific configuration. */ # include "pngconf.h" #endif @@ -501,8 +476,9 @@ * code when it is built. (Build time configuration is in pnglibconf.h) * 2. Type definitions (base types are defined in pngconf.h), structure * definitions. * 3. Exported library functions. + * 4. Simplified API. * * The library source code has additional files (principally pngpriv.h) that * allow configuration of the library. */ @@ -545,8 +521,49 @@ * do not agree upon the version number. */ typedef char* png_libpng_version_%_VER_%; +/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info. + * + * png_struct is the cache of information used while reading or writing a single + * PNG file. One of these is always required, although the simplified API + * (below) hides the creation and destruction of it. + */ +typedef struct png_struct_def png_struct; +typedef const png_struct * png_const_structp; +typedef png_struct * png_structp; +typedef png_struct * * png_structpp; + +/* png_info contains information read from or to be written to a PNG file. One + * or more of these must exist while reading or creating a PNG file. The + * information is not used by libpng during read but is used to control what + * gets written when a PNG file is created. "png_get_" function calls read + * information during read and "png_set_" functions calls write information + * when creating a PNG. + * been moved into a separate header file that is not accessible to + * applications. Read libpng-manual.txt or libpng.3 for more info. + */ +typedef struct png_info_def png_info; +typedef png_info * png_infop; +typedef const png_info * png_const_infop; +typedef png_info * * png_infopp; + +/* Types with names ending 'p' are pointer types. The corresponding types with + * names ending 'rp' are identical pointer types except that the pointer is + * marked 'restrict', which means that it is the only pointer to the object + * passed to the function. Applications should not use the 'restrict' types; + * it is always valid to pass 'p' to a pointer with a function argument of the + * corresponding 'rp' type. Different compilers have different rules with + * regard to type matching in the presence of 'restrict'. For backward + * compatibility libpng callbacks never have 'restrict' in their parameters and, + * consequentially, writing portable application code is extremely difficult if + * an attempt is made to use 'restrict'. + */ +typedef png_struct * PNG_RESTRICT png_structrp; +typedef const png_struct * PNG_RESTRICT png_const_structrp; +typedef png_info * PNG_RESTRICT png_inforp; +typedef const png_info * PNG_RESTRICT png_const_inforp; + /* Three color definitions. The order of the red, green, and blue, (and the * exact size) is not important, although the size of the fields need to * be png_byte or png_uint_16 (as defined below). */ @@ -555,11 +572,11 @@ png_byte red; png_byte green; png_byte blue; } png_color; -typedef png_color FAR * png_colorp; -typedef PNG_CONST png_color FAR * png_const_colorp; -typedef png_color FAR * FAR * png_colorpp; +typedef png_color * png_colorp; +typedef const png_color * png_const_colorp; +typedef png_color * * png_colorpp; typedef struct png_color_16_struct { png_byte index; /* used for palette files */ @@ -567,11 +584,11 @@ png_uint_16 green; png_uint_16 blue; png_uint_16 gray; /* for use in grayscale files */ } png_color_16; -typedef png_color_16 FAR * png_color_16p; -typedef PNG_CONST png_color_16 FAR * png_const_color_16p; -typedef png_color_16 FAR * FAR * png_color_16pp; +typedef png_color_16 * png_color_16p; +typedef const png_color_16 * png_const_color_16p; +typedef png_color_16 * * png_color_16pp; typedef struct png_color_8_struct { png_byte red; /* for use in red green blue files */ @@ -579,11 +596,11 @@ png_byte blue; png_byte gray; /* for use in grayscale files */ png_byte alpha; /* for alpha channel files */ } png_color_8; -typedef png_color_8 FAR * png_color_8p; -typedef PNG_CONST png_color_8 FAR * png_const_color_8p; -typedef png_color_8 FAR * FAR * png_color_8pp; +typedef png_color_8 * png_color_8p; +typedef const png_color_8 * png_const_color_8p; +typedef png_color_8 * * png_color_8pp; /* * The following two structures are used for the in-core representation * of sPLT chunks. @@ -595,11 +612,11 @@ png_uint_16 blue; png_uint_16 alpha; png_uint_16 frequency; } png_sPLT_entry; -typedef png_sPLT_entry FAR * png_sPLT_entryp; -typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; -typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; +typedef png_sPLT_entry * png_sPLT_entryp; +typedef const png_sPLT_entry * png_const_sPLT_entryp; +typedef png_sPLT_entry * * png_sPLT_entrypp; /* When the depth of the sPLT palette is 8 bits, the color and alpha samples * occupy the LSB of their respective members, and the MSB of each member * is zero-filled. The frequency member always occupies the full 16 bits. @@ -611,11 +628,11 @@ png_byte depth; /* depth of palette samples */ png_sPLT_entryp entries; /* palette entries */ png_int_32 nentries; /* number of palette entries */ } png_sPLT_t; -typedef png_sPLT_t FAR * png_sPLT_tp; -typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; -typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; +typedef png_sPLT_t * png_sPLT_tp; +typedef const png_sPLT_t * png_const_sPLT_tp; +typedef png_sPLT_t * * png_sPLT_tpp; #ifdef PNG_TEXT_SUPPORTED /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, * and whether that contents is compressed or not. The "key" field @@ -650,11 +667,11 @@ or a NULL pointer */ png_charp lang_key; /* keyword translated UTF-8 string, 0 or more chars or a NULL pointer */ } png_text; -typedef png_text FAR * png_textp; -typedef PNG_CONST png_text FAR * png_const_textp; -typedef png_text FAR * FAR * png_textpp; +typedef png_text * png_textp; +typedef const png_text * png_const_textp; +typedef png_text * * png_textpp; #endif /* Supported compression types for text in PNG files (tEXt, and zTXt). * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ @@ -680,11 +697,11 @@ png_byte hour; /* hour of day, 0 - 23 */ png_byte minute; /* minute of hour, 0 - 59 */ png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ } png_time; -typedef png_time FAR * png_timep; -typedef PNG_CONST png_time FAR * png_const_timep; -typedef png_time FAR * FAR * png_timepp; +typedef png_time * png_timep; +typedef const png_time * png_const_timep; +typedef png_time * * png_timepp; #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) /* png_unknown_chunk is a structure to hold queued chunks for which there is @@ -700,31 +717,21 @@ /* libpng-using applications should NOT directly modify this byte. */ png_byte location; /* mode of operation at read time */ } - - png_unknown_chunk; -typedef png_unknown_chunk FAR * png_unknown_chunkp; -typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; -typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; + +typedef png_unknown_chunk * png_unknown_chunkp; +typedef const png_unknown_chunk * png_const_unknown_chunkp; +typedef png_unknown_chunk * * png_unknown_chunkpp; #endif /* Values for the unknown chunk location byte */ #define PNG_HAVE_IHDR 0x01 #define PNG_HAVE_PLTE 0x02 #define PNG_AFTER_IDAT 0x08 -/* The complete definition of png_info has, as of libpng-1.5.0, - * been moved into a separate header file that is not accessible to - * applications. Read libpng-manual.txt or libpng.3 for more info. - */ -typedef struct png_info_def png_info; -typedef png_info FAR * png_infop; -typedef PNG_CONST png_info FAR * png_const_infop; -typedef png_info FAR * FAR * png_infopp; - /* Maximum positive integer used in PNG is (2^31)-1 */ #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) #define PNG_UINT_32_MAX ((png_uint_32)(-1)) #define PNG_SIZE_MAX ((png_size_t)(-1)) @@ -838,18 +845,10 @@ png_byte channels; /* number of channels (1, 2, 3, or 4) */ png_byte pixel_depth; /* bits per pixel (depth * channels) */ } png_row_info; -typedef png_row_info FAR * png_row_infop; -typedef png_row_info FAR * FAR * png_row_infopp; - -/* The complete definition of png_struct has, as of libpng-1.5.0, - * been moved into a separate header file that is not accessible to - * applications. Read libpng-manual.txt or libpng.3 for more info. - */ -typedef struct png_struct_def png_struct; -typedef PNG_CONST png_struct FAR * png_const_structp; -typedef png_struct FAR * png_structp; +typedef png_row_info * png_row_infop; +typedef png_row_info * * png_row_infopp; /* These are the function types for the I/O functions and for the functions * that allow the user to override the default I/O functions with his or her * own. The png_error_ptr type should match that of user-supplied warning @@ -950,10 +949,8 @@ typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, png_alloc_size_t)); typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); -typedef png_struct FAR * FAR * png_structpp; - /* Section 3: exported functions * Here are the function definitions most commonly used. This is not * the place to find out how to use libpng. See libpng-manual.txt for the * full explanation, see example.c for the summary. This just provides @@ -987,9 +984,9 @@ /* Tell lib we have already handled the first magic bytes. * Handling more than 8 bytes from the beginning of the file is an error. */ -PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); +PNG_EXPORT(2, void, png_set_sig_bytes, (png_structrp png_ptr, int num_bytes)); /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a * PNG file. Returns zero if the supplied bytes match the 8-byte PNG * signature, and non-zero otherwise. Having num_to_check == 0 or @@ -1015,11 +1012,11 @@ png_error_ptr warn_fn), PNG_ALLOCATED); PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); -PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, +PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structrp png_ptr, png_size_t size)); /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp * match up. @@ -1031,9 +1028,9 @@ * acceptable. The size of the jmp_buf is checked against the actual size * allocated by the library - the call will return NULL on a mismatch * indicating an ABI mismatch. */ -PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, +PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structrp png_ptr, png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); # define png_jmpbuf(png_ptr) \ (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) #else @@ -1044,14 +1041,14 @@ * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it * will use it; otherwise it will call PNG_ABORT(). This function was * added in libpng-1.5.0. */ -PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), +PNG_EXPORTA(9, void, png_longjmp, (png_const_structrp png_ptr, int val), PNG_NORETURN); #ifdef PNG_READ_SUPPORTED /* Reset the compression stream */ -PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); +PNG_EXPORTA(10, int, png_reset_zstream, (png_structrp png_ptr), PNG_DEPRECATED); #endif /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ #ifdef PNG_USER_MEM_SUPPORTED @@ -1067,83 +1064,93 @@ PNG_ALLOCATED); #endif /* Write the PNG file signature. */ -PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); +PNG_EXPORT(13, void, png_write_sig, (png_structrp png_ptr)); /* Write a PNG chunk - size, type, (optional) data, CRC. */ -PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep +PNG_EXPORT(14, void, png_write_chunk, (png_structrp png_ptr, png_const_bytep chunk_name, png_const_bytep data, png_size_t length)); /* Write the start of a PNG chunk - length and chunk name. */ -PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, +PNG_EXPORT(15, void, png_write_chunk_start, (png_structrp png_ptr, png_const_bytep chunk_name, png_uint_32 length)); /* Write the data of a PNG chunk started with png_write_chunk_start(). */ -PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, +PNG_EXPORT(16, void, png_write_chunk_data, (png_structrp png_ptr, png_const_bytep data, png_size_t length)); /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ -PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); +PNG_EXPORT(17, void, png_write_chunk_end, (png_structrp png_ptr)); /* Allocate and initialize the info structure */ -PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), +PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_const_structrp png_ptr), PNG_ALLOCATED); -PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, - png_size_t png_info_struct_size)); +/* DEPRECATED: this function allowed init structures to be created using the + * default allocation method (typically malloc). Use is deprecated in 1.6.0 and + * the API will be removed in the future. + */ +PNG_EXPORTA(19, void, png_info_init_3, (png_infopp info_ptr, + png_size_t png_info_struct_size), PNG_DEPRECATED); /* Writes all the PNG information before the image. */ PNG_EXPORT(20, void, png_write_info_before_PLTE, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(21, void, png_write_info, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_const_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the information before the actual image data. */ PNG_EXPORT(22, void, png_read_info, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_inforp info_ptr)); #endif #ifdef PNG_TIME_RFC1123_SUPPORTED -PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, - (png_structp png_ptr, + /* Convert to a US string format: there is no localization support in this + * routine. The original implementation used a 29 character buffer in + * png_struct, this will be removed in future versions. + */ +#if PNG_LIBPNG_VER < 10700 +PNG_EXPORTA(23, png_const_charp, png_convert_to_rfc1123, (png_structrp png_ptr, + png_const_timep ptime),PNG_DEPRECATED); +#endif +PNG_EXPORT(241, int, png_convert_to_rfc1123_buffer, (char out[29], png_const_timep ptime)); #endif #ifdef PNG_CONVERT_tIME_SUPPORTED /* Convert from a struct tm to png_time */ PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, - PNG_CONST struct tm FAR * ttime)); + const struct tm * ttime)); /* Convert from time_t to png_time. Uses gmtime() */ -PNG_EXPORT(25, void, png_convert_from_time_t, - (png_timep ptime, time_t ttime)); +PNG_EXPORT(25, void, png_convert_from_time_t, (png_timep ptime, time_t ttime)); #endif /* PNG_CONVERT_tIME_SUPPORTED */ #ifdef PNG_READ_EXPAND_SUPPORTED /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ -PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); -PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); -PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); -PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); +PNG_EXPORT(26, void, png_set_expand, (png_structrp png_ptr)); +PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structrp png_ptr)); +PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structrp png_ptr)); +PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structrp png_ptr)); #endif #ifdef PNG_READ_EXPAND_16_SUPPORTED /* Expand to 16-bit channels, forces conversion of palette to RGB and expansion * of a tRNS chunk if present. */ -PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr)); +PNG_EXPORT(221, void, png_set_expand_16, (png_structrp png_ptr)); #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) /* Use blue, green, red order for pixels. */ -PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); +PNG_EXPORT(30, void, png_set_bgr, (png_structrp png_ptr)); #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* Expand the grayscale to 24-bit RGB if necessary. */ -PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); +PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structrp png_ptr)); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED /* Reduce RGB to grayscale. */ @@ -1151,14 +1158,14 @@ #define PNG_ERROR_ACTION_WARN 2 #define PNG_ERROR_ACTION_ERROR 3 #define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ -PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, - int error_action, double red, double green)); -PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, - int error_action, png_fixed_point red, png_fixed_point green)); +PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structrp png_ptr, + int error_action, double red, double green)) +PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structrp png_ptr, + int error_action, png_fixed_point red, png_fixed_point green)) -PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp +PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structrp png_ptr)); #endif #ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED @@ -1221,12 +1228,12 @@ #define PNG_ALPHA_PREMULTIPLIED 1 /* as above */ #define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ #define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ -PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, - double output_gamma)); -PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, - int mode, png_fixed_point output_gamma)); +PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structrp png_ptr, int mode, + double output_gamma)) +PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structrp png_ptr, + int mode, png_fixed_point output_gamma)) #endif #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) /* The output_gamma value is a screen gamma in libpng terminology: it expresses @@ -1375,53 +1382,52 @@ * are ignored. */ #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED -PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); +PNG_EXPORT(36, void, png_set_strip_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); +PNG_EXPORT(37, void, png_set_swap_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); +PNG_EXPORT(38, void, png_set_invert_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, +PNG_EXPORT(39, void, png_set_filler, (png_structrp png_ptr, png_uint_32 filler, int flags)); /* The values of the PNG_FILLER_ defines should NOT be changed */ # define PNG_FILLER_BEFORE 0 # define PNG_FILLER_AFTER 1 /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(40, void, png_set_add_alpha, - (png_structp png_ptr, png_uint_32 filler, - int flags)); +PNG_EXPORT(40, void, png_set_add_alpha, (png_structrp png_ptr, + png_uint_32 filler, int flags)); #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) /* Swap bytes in 16-bit depth files. */ -PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); +PNG_EXPORT(41, void, png_set_swap, (png_structrp png_ptr)); #endif #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ -PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); +PNG_EXPORT(42, void, png_set_packing, (png_structrp png_ptr)); #endif #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ defined(PNG_WRITE_PACKSWAP_SUPPORTED) /* Swap packing order of pixels in bytes. */ -PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); +PNG_EXPORT(43, void, png_set_packswap, (png_structrp png_ptr)); #endif #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) /* Converts files to legal bit depths. */ -PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p +PNG_EXPORT(44, void, png_set_shift, (png_structrp png_ptr, png_const_color_8p true_bits)); #endif #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ @@ -1431,28 +1437,28 @@ * otherwise it will not have the desired effect. Note that it is still * necessary to call png_read_row or png_read_rows png_get_image_height * times for each pass. */ -PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); +PNG_EXPORT(45, int, png_set_interlace_handling, (png_structrp png_ptr)); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) /* Invert monochrome files */ -PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); +PNG_EXPORT(46, void, png_set_invert_mono, (png_structrp png_ptr)); #endif #ifdef PNG_READ_BACKGROUND_SUPPORTED /* Handle alpha and tRNS by replacing with a background color. Prior to * libpng-1.5.4 this API must not be called before the PNG file header has been * read. Doing so will result in unexpected behavior and possible warnings or * errors if the PNG file contains a bKGD chunk. */ -PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, +PNG_FP_EXPORT(47, void, png_set_background, (png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma)); -PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, + int need_expand, double background_gamma)) +PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, - int need_expand, png_fixed_point background_gamma)); + int need_expand, png_fixed_point background_gamma)) #endif #ifdef PNG_READ_BACKGROUND_SUPPORTED # define PNG_BACKGROUND_GAMMA_UNKNOWN 0 # define PNG_BACKGROUND_GAMMA_SCREEN 1 @@ -1461,25 +1467,24 @@ #endif #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* Scale a 16-bit depth file down to 8-bit, accurately. */ -PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr)); +PNG_EXPORT(229, void, png_set_scale_16, (png_structrp png_ptr)); #endif #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED #define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ /* Strip the second byte of information from a 16-bit depth file. */ -PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); +PNG_EXPORT(48, void, png_set_strip_16, (png_structrp png_ptr)); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED /* Turn on quantizing, and reduce the palette to the number of colors * available. */ -PNG_EXPORT(49, void, png_set_quantize, - (png_structp png_ptr, png_colorp palette, - int num_palette, int maximum_colors, png_const_uint_16p histogram, - int full_quantize)); +PNG_EXPORT(49, void, png_set_quantize, (png_structrp png_ptr, + png_colorp palette, int num_palette, int maximum_colors, + png_const_uint_16p histogram, int full_quantize)); #endif #ifdef PNG_READ_GAMMA_SUPPORTED /* The threshold on gamma processing is configurable but hard-wired into the @@ -1497,73 +1502,69 @@ * above). The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either * API (floating point or fixed.) Notice, however, that the 'file_gamma' value * is the inverse of a 'screen gamma' value. */ -PNG_FP_EXPORT(50, void, png_set_gamma, - (png_structp png_ptr, double screen_gamma, - double override_file_gamma)); -PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, - png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); +PNG_FP_EXPORT(50, void, png_set_gamma, (png_structrp png_ptr, + double screen_gamma, double override_file_gamma)) +PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structrp png_ptr, + png_fixed_point screen_gamma, png_fixed_point override_file_gamma)) #endif #ifdef PNG_WRITE_FLUSH_SUPPORTED /* Set how many lines between output flushes - 0 for no flushing */ -PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); +PNG_EXPORT(51, void, png_set_flush, (png_structrp png_ptr, int nrows)); /* Flush the current PNG output buffer */ -PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); +PNG_EXPORT(52, void, png_write_flush, (png_structrp png_ptr)); #endif /* Optional update palette with requested transformations */ -PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); +PNG_EXPORT(53, void, png_start_read_image, (png_structrp png_ptr)); /* Optional call to update the users info structure */ -PNG_EXPORT(54, void, png_read_update_info, - (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(54, void, png_read_update_info, (png_structrp png_ptr, + png_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read one or more rows of image data. */ -PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, +PNG_EXPORT(55, void, png_read_rows, (png_structrp png_ptr, png_bytepp row, png_bytepp display_row, png_uint_32 num_rows)); #endif #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read a row of data. */ -PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, +PNG_EXPORT(56, void, png_read_row, (png_structrp png_ptr, png_bytep row, png_bytep display_row)); #endif #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the whole image into memory at once. */ -PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); +PNG_EXPORT(57, void, png_read_image, (png_structrp png_ptr, png_bytepp image)); #endif /* Write a row of image data */ -PNG_EXPORT(58, void, png_write_row, - (png_structp png_ptr, png_const_bytep row)); +PNG_EXPORT(58, void, png_write_row, (png_structrp png_ptr, png_const_bytep row)); /* Write a few rows of image data: (*row) is not written; however, the type * is declared as writeable to maintain compatibility with previous versions * of libpng and to allow the 'display_row' array from read_rows to be passed * unchanged to write_rows. */ -PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, +PNG_EXPORT(59, void, png_write_rows, (png_structrp png_ptr, png_bytepp row, png_uint_32 num_rows)); /* Write the image data */ -PNG_EXPORT(60, void, png_write_image, - (png_structp png_ptr, png_bytepp image)); +PNG_EXPORT(60, void, png_write_image, (png_structrp png_ptr, png_bytepp image)); /* Write the end of the PNG file. */ -PNG_EXPORT(61, void, png_write_end, - (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(61, void, png_write_end, (png_structrp png_ptr, png_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the end of the PNG file. */ -PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(62, void, png_read_end, (png_structrp png_ptr, png_inforp info_ptr)); #endif /* Free any memory associated with the png_info_struct */ -PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, +PNG_EXPORT(63, void, png_destroy_info_struct, (png_const_structrp png_ptr, png_infopp info_ptr_ptr)); /* Free any memory associated with the png_struct and the png_info_structs */ PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, @@ -1573,10 +1574,10 @@ PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)); /* Set the libpng method of handling chunk CRC errors */ -PNG_EXPORT(66, void, png_set_crc_action, - (png_structp png_ptr, int crit_action, int ancil_action)); +PNG_EXPORT(66, void, png_set_crc_action, (png_structrp png_ptr, int crit_action, + int ancil_action)); /* Values for png_set_crc_action() say how to handle CRC errors in * ancillary and critical chunks, and whether to use the data contained * therein. Note that it is impossible to "discard" data in a critical @@ -1603,10 +1604,10 @@ /* Set the filtering method(s) used by libpng. Currently, the only valid * value for "method" is 0. */ -PNG_EXPORT(67, void, png_set_filter, - (png_structp png_ptr, int method, int filters)); +PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method, + int filters)); /* Flags for png_set_filter() to say which filters to use. The flags * are chosen so that they don't conflict with real filter types * below, in case they are supplied instead of the #defined constants. @@ -1659,15 +1660,15 @@ * change if good general weighting/cost heuristics can be found. If both * the weights and costs are set to 1.0, this degenerates the WEIGHTED method * to the UNWEIGHTED method, but with added encoding time/computation. */ -PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, +PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structrp png_ptr, int heuristic_method, int num_weights, png_const_doublep filter_weights, - png_const_doublep filter_costs)); + png_const_doublep filter_costs)) PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, - (png_structp png_ptr, - int heuristic_method, int num_weights, png_const_fixed_point_p - filter_weights, png_const_fixed_point_p filter_costs)); + (png_structrp png_ptr, int heuristic_method, int num_weights, + png_const_fixed_point_p filter_weights, + png_const_fixed_point_p filter_costs)) #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ /* Heuristic used for row filter selection. These defines should NOT be * changed. @@ -1684,45 +1685,45 @@ * shown that zlib compression levels 3-6 usually perform as well as level 9 * for PNG images, and do considerably fewer caclulations. In the future, * these values may not correspond directly to the zlib compression levels. */ -PNG_EXPORT(69, void, png_set_compression_level, - (png_structp png_ptr, int level)); +PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr, + int level)); -PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, +PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structrp png_ptr, int mem_level)); -PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, +PNG_EXPORT(71, void, png_set_compression_strategy, (png_structrp png_ptr, int strategy)); /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a * smaller value of window_bits if it can do so safely. */ -PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, +PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structrp png_ptr, int window_bits)); -PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, +PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr, int method)); #endif #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED /* Also set zlib parameters for compressing non-IDAT chunks */ -PNG_EXPORT(222, void, png_set_text_compression_level, - (png_structp png_ptr, int level)); +PNG_EXPORT(222, void, png_set_text_compression_level, (png_structrp png_ptr, + int level)); -PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structp png_ptr, +PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structrp png_ptr, int mem_level)); -PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structp png_ptr, +PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structrp png_ptr, int strategy)); /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a * smaller value of window_bits if it can do so safely. */ -PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp - png_ptr, int window_bits)); +PNG_EXPORT(225, void, png_set_text_compression_window_bits, + (png_structrp png_ptr, int window_bits)); -PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, +PNG_EXPORT(226, void, png_set_text_compression_method, (png_structrp png_ptr, int method)); #endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ /* These next functions are called for input/output, memory, and error @@ -1735,9 +1736,9 @@ */ #ifdef PNG_STDIO_SUPPORTED /* Initialize the input/output for the PNG file to the default functions. */ -PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); +PNG_EXPORT(74, void, png_init_io, (png_structrp png_ptr, png_FILE_p fp)); #endif /* Replace the (error and abort), and warning functions with user * supplied functions. If no messages are to be printed you must still @@ -1746,14 +1747,13 @@ * method of error handling. If error_fn or warning_fn is NULL, the * default function will be used. */ -PNG_EXPORT(75, void, png_set_error_fn, - (png_structp png_ptr, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warning_fn)); +PNG_EXPORT(75, void, png_set_error_fn, (png_structrp png_ptr, + png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); /* Return the user pointer associated with the error functions */ -PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structrp png_ptr)); /* Replace the default data output functions with a user supplied one(s). * If buffered output is not used, then output_flush_fn can be set to NULL. * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time @@ -1763,49 +1763,49 @@ * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's * default flush function, which uses the standard *FILE structure, will * be used. */ -PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, +PNG_EXPORT(77, void, png_set_write_fn, (png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); /* Replace the default data input function with a user supplied one. */ -PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, +PNG_EXPORT(78, void, png_set_read_fn, (png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr read_data_fn)); /* Return the user pointer associated with the I/O functions */ -PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); +PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_const_structrp png_ptr)); -PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, +PNG_EXPORT(80, void, png_set_read_status_fn, (png_structrp png_ptr, png_read_status_ptr read_row_fn)); -PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, +PNG_EXPORT(81, void, png_set_write_status_fn, (png_structrp png_ptr, png_write_status_ptr write_row_fn)); #ifdef PNG_USER_MEM_SUPPORTED /* Replace the default memory allocation functions with user supplied one(s). */ -PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, +PNG_EXPORT(82, void, png_set_mem_fn, (png_structrp png_ptr, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)); /* Return the user pointer associated with the memory functions */ -PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structrp png_ptr)); #endif #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, +PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structrp png_ptr, png_user_transform_ptr read_user_transform_fn)); #endif #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, +PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structrp png_ptr, png_user_transform_ptr write_user_transform_fn)); #endif #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED -PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, +PNG_EXPORT(86, void, png_set_user_transform_info, (png_structrp png_ptr, png_voidp user_transform_ptr, int user_transform_depth, int user_transform_channels)); /* Return the user pointer associated with the user transform functions */ PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #endif #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED /* Return information about the row currently being processed. Note that these @@ -1818,32 +1818,31 @@ * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to * find the output pixel (x,y) given an interlaced sub-image pixel * (row,col,pass). (See below for these macros.) */ -PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); -PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); +PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structrp)); +PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structrp)); #endif #ifdef PNG_USER_CHUNKS_SUPPORTED -PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, +PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structrp png_ptr, png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); -PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structrp png_ptr)); #endif #ifdef PNG_PROGRESSIVE_READ_SUPPORTED /* Sets the function callbacks for the push reader, and a pointer to a * user-defined structure available to the callback functions. */ -PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, +PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structrp png_ptr, png_voidp progressive_ptr, png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); /* Returns the user pointer associated with the push read functions */ -PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structrp png_ptr)); /* Function to be called when data becomes available */ -PNG_EXPORT(92, void, png_process_data, - (png_structp png_ptr, png_infop info_ptr, +PNG_EXPORT(92, void, png_process_data, (png_structrp png_ptr, png_inforp info_ptr, png_bytep buffer, png_size_t buffer_size)); /* A function which may be called *only* within png_process_data to stop the * processing of any more data. The function returns the number of bytes @@ -1851,52 +1850,55 @@ * call to png_process_data must supply these bytes again. If the argument * 'save' is set to true the routine will first save all the pending data and * will always return 0. */ -PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); +PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structrp, int save)); /* A function which may be called *only* outside (after) a call to * png_process_data. It returns the number of bytes of data to skip in the * input. Normally it will return 0, but if it returns a non-zero value the * application must skip than number of bytes of input data and pass the * following data to the next call to png_process_data. */ -PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); +PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp)); #ifdef PNG_READ_INTERLACING_SUPPORTED /* Function that combines rows. 'new_row' is a flag that should come from * the callback and be non-NULL if anything needs to be done; the library * stores its own version of the new data internally and ignores the passed * in value. */ -PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, +PNG_EXPORT(93, void, png_progressive_combine_row, (png_const_structrp png_ptr, png_bytep old_row, png_const_bytep new_row)); #endif /* PNG_READ_INTERLACING_SUPPORTED */ #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ -PNG_EXPORTA(94, png_voidp, png_malloc, - (png_structp png_ptr, png_alloc_size_t size), - PNG_ALLOCATED); +PNG_EXPORTA(94, png_voidp, png_malloc, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); /* Added at libpng version 1.4.0 */ -PNG_EXPORTA(95, png_voidp, png_calloc, - (png_structp png_ptr, png_alloc_size_t size), - PNG_ALLOCATED); +PNG_EXPORTA(95, png_voidp, png_calloc, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); /* Added at libpng version 1.2.4 */ -PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, +PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_const_structrp png_ptr, png_alloc_size_t size), PNG_ALLOCATED); /* Frees a pointer allocated by png_malloc() */ -PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); +PNG_EXPORT(97, void, png_free, (png_const_structrp png_ptr, png_voidp ptr)); /* Free data that was allocated internally */ -PNG_EXPORT(98, void, png_free_data, - (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); +PNG_EXPORT(98, void, png_free_data, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_32 free_me, int num)); /* Reassign responsibility for freeing existing data, whether allocated - * by libpng or by the application */ -PNG_EXPORT(99, void, png_data_freer, - (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); + * by libpng or by the application; this works on the png_info structure passed + * in, it does not change the state for other png_info structures. + * + * It is unlikely that this function works correctly as of 1.6.0 and using it + * may result either in memory leaks or double free of allocated data. + */ +PNG_EXPORTA(99, void, png_data_freer, (png_const_structrp png_ptr, + png_inforp info_ptr, int freer, png_uint_32 mask), PNG_DEPRECATED); /* Assignments for png_data_freer */ #define PNG_DESTROY_WILL_FREE_DATA 1 #define PNG_SET_WILL_FREE_DATA 1 @@ -1916,52 +1918,50 @@ #define PNG_FREE_ALL 0x7fff #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ #ifdef PNG_USER_MEM_SUPPORTED -PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, - png_alloc_size_t size), PNG_ALLOCATED); -PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); +PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED PNG_DEPRECATED); +PNG_EXPORTA(101, void, png_free_default, (png_const_structrp png_ptr, + png_voidp ptr), PNG_DEPRECATED); #endif #ifdef PNG_ERROR_TEXT_SUPPORTED /* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORTA(102, void, png_error, - (png_structp png_ptr, png_const_charp error_message), - PNG_NORETURN); +PNG_EXPORTA(102, void, png_error, (png_const_structrp png_ptr, + png_const_charp error_message), PNG_NORETURN); /* The same, but the chunk name is prepended to the error string. */ -PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, +PNG_EXPORTA(103, void, png_chunk_error, (png_const_structrp png_ptr, png_const_charp error_message), PNG_NORETURN); #else /* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); +PNG_EXPORTA(104, void, png_err, (png_const_structrp png_ptr), PNG_NORETURN); #endif #ifdef PNG_WARNINGS_SUPPORTED /* Non-fatal error in libpng. Can continue, but may have a problem. */ -PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, +PNG_EXPORT(105, void, png_warning, (png_const_structrp png_ptr, png_const_charp warning_message)); /* Non-fatal error in libpng, chunk name is prepended to message. */ -PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, +PNG_EXPORT(106, void, png_chunk_warning, (png_const_structrp png_ptr, png_const_charp warning_message)); #endif #ifdef PNG_BENIGN_ERRORS_SUPPORTED /* Benign error in libpng. Can continue, but may have a problem. * User can choose whether to handle as a fatal error or as a warning. */ -# undef png_benign_error -PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, +PNG_EXPORT(107, void, png_benign_error, (png_const_structrp png_ptr, png_const_charp warning_message)); /* Same, chunk name is prepended to message. */ -# undef png_chunk_benign_error -PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, +PNG_EXPORT(108, void, png_chunk_benign_error, (png_const_structrp png_ptr, png_const_charp warning_message)); PNG_EXPORT(109, void, png_set_benign_errors, - (png_structp png_ptr, int allowed)); + (png_structrp png_ptr, int allowed)); #else # ifdef PNG_ALLOW_BENIGN_ERRORS # define png_benign_error png_warning # define png_chunk_benign_error png_chunk_warning @@ -1983,291 +1983,274 @@ * to avoid problems with future changes in the size and internal layout of * png_info_struct. */ /* Returns "flag" if chunk data is valid in info_ptr. */ -PNG_EXPORT(110, png_uint_32, png_get_valid, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_32 flag)); +PNG_EXPORT(110, png_uint_32, png_get_valid, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 flag)); /* Returns number of bytes needed to hold a transformed row. */ -PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); #ifdef PNG_INFO_IMAGE_SUPPORTED /* Returns row_pointers, which is an array of pointers to scanlines that was * returned from png_read_png(). */ -PNG_EXPORT(112, png_bytepp, png_get_rows, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(112, png_bytepp, png_get_rows, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); + /* Set row_pointers, which is an array of pointers to scanlines for use * by png_write_png(). */ -PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, - png_infop info_ptr, png_bytepp row_pointers)); +PNG_EXPORT(113, void, png_set_rows, (png_const_structrp png_ptr, + png_inforp info_ptr, png_bytepp row_pointers)); #endif /* Returns number of color channels in image. */ -PNG_EXPORT(114, png_byte, png_get_channels, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(114, png_byte, png_get_channels, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); #ifdef PNG_EASY_ACCESS_SUPPORTED /* Returns image width in pixels. */ -PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image height in pixels. */ -PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image bit_depth. */ -PNG_EXPORT(117, png_byte, png_get_bit_depth, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(117, png_byte, png_get_bit_depth, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image color_type. */ -PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image filter_type. */ -PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image interlace_type. */ -PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image compression_type. */ -PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image resolution in pixels per meter, from pHYs chunk data. */ PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); /* Returns pixel aspect ratio, computed from pHYs chunk data. */ PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); #endif /* PNG_EASY_ACCESS_SUPPORTED */ /* Returns pointer to signature string read from PNG header */ -PNG_EXPORT(130, png_const_bytep, png_get_signature, - (png_const_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(130, png_const_bytep, png_get_signature, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); #ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(131, png_uint_32, png_get_bKGD, - (png_const_structp png_ptr, png_infop info_ptr, - png_color_16p *background)); +PNG_EXPORT(131, png_uint_32, png_get_bKGD, (png_const_structrp png_ptr, + png_inforp info_ptr, png_color_16p *background)); #endif #ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, - png_const_color_16p background)); +PNG_EXPORT(132, void, png_set_bKGD, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_color_16p background)); #endif #ifdef PNG_cHRM_SUPPORTED -PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, - png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, +PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structrp png_ptr, + png_const_inforp info_ptr, double *white_x, double *white_y, double *red_x, double *red_y, double *green_x, double *green_y, double *blue_x, - double *blue_y)); -PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, - png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, + double *blue_y)) +PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_const_structrp png_ptr, + png_const_inforp info_ptr, double *red_X, double *red_Y, double *red_Z, double *green_X, double *green_Y, double *green_Z, double *blue_X, - double *blue_Y, double *blue_Z)); -#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ + double *blue_Y, double *blue_Z)) PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, - (png_const_structp png_ptr, - png_const_infop info_ptr, png_fixed_point *int_white_x, - png_fixed_point *int_white_y, png_fixed_point *int_red_x, - png_fixed_point *int_red_y, png_fixed_point *int_green_x, - png_fixed_point *int_green_y, png_fixed_point *int_blue_x, - png_fixed_point *int_blue_y)); -#endif + (png_const_structrp png_ptr, png_const_inforp info_ptr, + png_fixed_point *int_white_x, png_fixed_point *int_white_y, + png_fixed_point *int_red_x, png_fixed_point *int_red_y, + png_fixed_point *int_green_x, png_fixed_point *int_green_y, + png_fixed_point *int_blue_x, png_fixed_point *int_blue_y)) PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, - (png_structp png_ptr, png_const_infop info_ptr, + (png_const_structrp png_ptr, png_const_inforp info_ptr, png_fixed_point *int_red_X, png_fixed_point *int_red_Y, png_fixed_point *int_red_Z, png_fixed_point *int_green_X, png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, - png_fixed_point *int_blue_Z)); + png_fixed_point *int_blue_Z)) #endif #ifdef PNG_cHRM_SUPPORTED -PNG_FP_EXPORT(135, void, png_set_cHRM, - (png_structp png_ptr, png_infop info_ptr, +PNG_FP_EXPORT(135, void, png_set_cHRM, (png_const_structrp png_ptr, + png_inforp info_ptr, double white_x, double white_y, double red_x, double red_y, double green_x, - double green_y, double blue_x, double blue_y)); -PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, - png_infop info_ptr, double red_X, double red_Y, double red_Z, + double green_y, double blue_x, double blue_y)) +PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_const_structrp png_ptr, + png_inforp info_ptr, double red_X, double red_Y, double red_Z, double green_X, double green_Y, double green_Z, double blue_X, - double blue_Y, double blue_Z)); -PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_white_x, + double blue_Y, double blue_Z)) +PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y, png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, + png_fixed_point int_blue_y)) +PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, png_fixed_point int_red_Z, png_fixed_point int_green_X, png_fixed_point int_green_Y, png_fixed_point int_green_Z, png_fixed_point int_blue_X, png_fixed_point int_blue_Y, - png_fixed_point int_blue_Z)); + png_fixed_point int_blue_Z)) #endif #ifdef PNG_gAMA_SUPPORTED -PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, - (png_const_structp png_ptr, png_const_infop info_ptr, - double *file_gamma)); +PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr, + png_const_inforp info_ptr, double *file_gamma)) PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_fixed_point *int_file_gamma)); + (png_const_structrp png_ptr, png_const_inforp info_ptr, + png_fixed_point *int_file_gamma)) #endif #ifdef PNG_gAMA_SUPPORTED -PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, - png_infop info_ptr, double file_gamma)); -PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_file_gamma)); +PNG_FP_EXPORT(139, void, png_set_gAMA, (png_const_structrp png_ptr, + png_inforp info_ptr, double file_gamma)) +PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, png_fixed_point int_file_gamma)) #endif #ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(141, png_uint_32, png_get_hIST, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_16p *hist)); +PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_16p *hist)); #endif #ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, - png_infop info_ptr, png_const_uint_16p hist)); +PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_uint_16p hist)); #endif -PNG_EXPORT(143, png_uint_32, png_get_IHDR, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, - int *interlace_method, int *compression_method, int *filter_method)); - -PNG_EXPORT(144, void, png_set_IHDR, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, - int interlace_method, int compression_method, int filter_method)); +PNG_EXPORT(143, png_uint_32, png_get_IHDR, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 *width, png_uint_32 *height, + int *bit_depth, int *color_type, int *interlace_method, + int *compression_method, int *filter_method)); + +PNG_EXPORT(144, void, png_set_IHDR, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_method, int compression_method, + int filter_method)); #ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(145, png_uint_32, png_get_oFFs, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); +PNG_EXPORT(145, png_uint_32, png_get_oFFs, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, + int *unit_type)); #endif #ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(146, void, png_set_oFFs, - (png_structp png_ptr, png_infop info_ptr, - png_int_32 offset_x, png_int_32 offset_y, int unit_type)); +PNG_EXPORT(146, void, png_set_oFFs, (png_const_structrp png_ptr, + png_inforp info_ptr, png_int_32 offset_x, png_int_32 offset_y, + int unit_type)); #endif #ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(147, png_uint_32, png_get_pCAL, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, - int *nparams, - png_charp *units, png_charpp *params)); +PNG_EXPORT(147, png_uint_32, png_get_pCAL, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_charp *purpose, png_int_32 *X0, + png_int_32 *X1, int *type, int *nparams, png_charp *units, + png_charpp *params)); #endif #ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, - png_infop info_ptr, - png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, - int nparams, png_const_charp units, png_charpp params)); +PNG_EXPORT(148, void, png_set_pCAL, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1, + int type, int nparams, png_const_charp units, png_charpp params)); #endif #ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(149, png_uint_32, png_get_pHYs, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); +PNG_EXPORT(149, png_uint_32, png_get_pHYs, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, + int *unit_type)); #endif #ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(150, void, png_set_pHYs, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type)); +PNG_EXPORT(150, void, png_set_pHYs, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); #endif -PNG_EXPORT(151, png_uint_32, png_get_PLTE, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_colorp *palette, int *num_palette)); - -PNG_EXPORT(152, void, png_set_PLTE, - (png_structp png_ptr, png_infop info_ptr, - png_const_colorp palette, int num_palette)); +PNG_EXPORT(151, png_uint_32, png_get_PLTE, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_colorp *palette, int *num_palette)); + +PNG_EXPORT(152, void, png_set_PLTE, (png_structrp png_ptr, + png_inforp info_ptr, png_const_colorp palette, int num_palette)); #ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(153, png_uint_32, png_get_sBIT, - (png_const_structp png_ptr, png_infop info_ptr, - png_color_8p *sig_bit)); +PNG_EXPORT(153, png_uint_32, png_get_sBIT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_color_8p *sig_bit)); #endif #ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(154, void, png_set_sBIT, - (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); +PNG_EXPORT(154, void, png_set_sBIT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_color_8p sig_bit)); #endif #ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, - png_const_infop info_ptr, int *file_srgb_intent)); +PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structrp png_ptr, + png_const_inforp info_ptr, int *file_srgb_intent)); #endif #ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(156, void, png_set_sRGB, - (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); -PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, - png_infop info_ptr, int srgb_intent)); +PNG_EXPORT(156, void, png_set_sRGB, (png_const_structrp png_ptr, + png_inforp info_ptr, int srgb_intent)); +PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_const_structrp png_ptr, + png_inforp info_ptr, int srgb_intent)); #endif #ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(158, png_uint_32, png_get_iCCP, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_charpp name, int *compression_type, png_bytepp profile, - png_uint_32 *proflen)); +PNG_EXPORT(158, png_uint_32, png_get_iCCP, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_charpp name, int *compression_type, + png_bytepp profile, png_uint_32 *proflen)); #endif #ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(159, void, png_set_iCCP, - (png_structp png_ptr, png_infop info_ptr, - png_const_charp name, int compression_type, png_const_bytep profile, - png_uint_32 proflen)); +PNG_EXPORT(159, void, png_set_iCCP, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_charp name, int compression_type, + png_const_bytep profile, png_uint_32 proflen)); #endif #ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(160, png_uint_32, png_get_sPLT, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_sPLT_tpp entries)); +PNG_EXPORT(160, png_uint_32, png_get_sPLT, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_sPLT_tpp entries)); #endif #ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(161, void, png_set_sPLT, - (png_structp png_ptr, png_infop info_ptr, - png_const_sPLT_tp entries, int nentries)); +PNG_EXPORT(161, void, png_set_sPLT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_sPLT_tp entries, int nentries)); #endif #ifdef PNG_TEXT_SUPPORTED /* png_get_text also returns the number of text chunks in *num_text */ -PNG_EXPORT(162, png_uint_32, png_get_text, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_textp *text_ptr, int *num_text)); +PNG_EXPORT(162, png_uint_32, png_get_text, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_textp *text_ptr, int *num_text)); #endif /* Note while png_set_text() will accept a structure whose text, * language, and translated keywords are NULL pointers, the structure @@ -2276,64 +2259,60 @@ * they will never be NULL pointers. */ #ifdef PNG_TEXT_SUPPORTED -PNG_EXPORT(163, void, png_set_text, - (png_structp png_ptr, png_infop info_ptr, - png_const_textp text_ptr, int num_text)); +PNG_EXPORT(163, void, png_set_text, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_textp text_ptr, int num_text)); #endif #ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(164, png_uint_32, png_get_tIME, - (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); +PNG_EXPORT(164, png_uint_32, png_get_tIME, (png_const_structrp png_ptr, + png_inforp info_ptr, png_timep *mod_time)); #endif #ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(165, void, png_set_tIME, - (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); +PNG_EXPORT(165, void, png_set_tIME, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_timep mod_time)); #endif #ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(166, png_uint_32, png_get_tRNS, - (png_const_structp png_ptr, png_infop info_ptr, - png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); +PNG_EXPORT(166, png_uint_32, png_get_tRNS, (png_const_structrp png_ptr, + png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans, + png_color_16p *trans_color)); #endif #ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(167, void, png_set_tRNS, - (png_structp png_ptr, png_infop info_ptr, - png_const_bytep trans_alpha, int num_trans, +PNG_EXPORT(167, void, png_set_tRNS, (png_structrp png_ptr, + png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)); #endif #ifdef PNG_sCAL_SUPPORTED -PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, - (png_const_structp png_ptr, png_const_infop info_ptr, - int *unit, double *width, double *height)); -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, (png_const_structrp png_ptr, + png_const_inforp info_ptr, int *unit, double *width, double *height)) +#if (defined PNG_FLOATING_ARITHMETIC_SUPPORTED) || \ + (defined PNG_FLOATING_POINT_SUPPORTED) /* NOTE: this API is currently implemented using floating point arithmetic, * consequently it can only be used on systems with floating point support. * In any case the range of values supported by png_fixed_point is small and it * is highly recommended that png_get_sCAL_s be used instead. */ PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, - (png_structp png_ptr, png_const_infop info_ptr, int *unit, - png_fixed_point *width, - png_fixed_point *height)); + (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, + png_fixed_point *width, png_fixed_point *height)) #endif PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, - (png_const_structp png_ptr, png_const_infop info_ptr, - int *unit, png_charpp swidth, png_charpp sheight)); + (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, + png_charpp swidth, png_charpp sheight)); -PNG_FP_EXPORT(170, void, png_set_sCAL, - (png_structp png_ptr, png_infop info_ptr, - int unit, double width, double height)); -PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, - png_infop info_ptr, int unit, png_fixed_point width, - png_fixed_point height)); -PNG_EXPORT(171, void, png_set_sCAL_s, - (png_structp png_ptr, png_infop info_ptr, - int unit, png_const_charp swidth, png_const_charp sheight)); +PNG_FP_EXPORT(170, void, png_set_sCAL, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, double width, double height)) +PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, png_fixed_point width, + png_fixed_point height)) +PNG_EXPORT(171, void, png_set_sCAL_s, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, + png_const_charp swidth, png_const_charp sheight)); #endif /* PNG_sCAL_SUPPORTED */ #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED /* Provide a list of chunks and how they are to be handled, if the built-in @@ -2346,54 +2325,53 @@ = 1: PNG_HANDLE_CHUNK_NEVER: do not keep = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy */ -PNG_EXPORT(172, void, png_set_keep_unknown_chunks, - (png_structp png_ptr, int keep, - png_const_bytep chunk_list, int num_chunks)); +PNG_EXPORT(172, void, png_set_keep_unknown_chunks, (png_structrp png_ptr, + int keep, png_const_bytep chunk_list, int num_chunks)); /* The handling code is returned; the result is therefore true (non-zero) if * special handling is required, false for the default handling. */ -PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, +PNG_EXPORT(173, int, png_handle_as_unknown, (png_structrp png_ptr, png_const_bytep chunk_name)); #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, - png_infop info_ptr, png_const_unknown_chunkp unknowns, +PNG_EXPORT(174, void, png_set_unknown_chunks, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)); PNG_EXPORT(175, void, png_set_unknown_chunk_location, - (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); -PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, - png_const_infop info_ptr, png_unknown_chunkpp entries)); + (png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location)); +PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_unknown_chunkpp entries)); #endif /* Png_free_data() will turn off the "valid" flag for anything it frees. * If you need to turn it off for a chunk that your application has freed, * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); */ -PNG_EXPORT(177, void, png_set_invalid, - (png_structp png_ptr, png_infop info_ptr, int mask)); +PNG_EXPORT(177, void, png_set_invalid, (png_const_structrp png_ptr, + png_inforp info_ptr, int mask)); #ifdef PNG_INFO_IMAGE_SUPPORTED /* The "params" pointer is currently not used and is for future expansion. */ -PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, +PNG_EXPORT(178, void, png_read_png, (png_structrp png_ptr, png_inforp info_ptr, int transforms, png_voidp params)); -PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, +PNG_EXPORT(179, void, png_write_png, (png_structrp png_ptr, png_inforp info_ptr, int transforms, png_voidp params)); #endif PNG_EXPORT(180, png_const_charp, png_get_copyright, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(181, png_const_charp, png_get_header_ver, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(182, png_const_charp, png_get_header_version, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, +PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structrp png_ptr, png_uint_32 mng_features_permitted)); #endif /* For use in png_set_keep_unknown, added to version 1.2.6 */ @@ -2405,72 +2383,73 @@ /* Strip the prepended error numbers ("#nnn ") from error and warning * messages before passing them to the error or warning handler. */ #ifdef PNG_ERROR_NUMBERS_SUPPORTED -PNG_EXPORT(185, void, png_set_strip_error_numbers, - (png_structp png_ptr, +PNG_EXPORT(185, void, png_set_strip_error_numbers, (png_structrp png_ptr, png_uint_32 strip_mode)); #endif /* Added in libpng-1.2.6 */ #ifdef PNG_SET_USER_LIMITS_SUPPORTED -PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, +PNG_EXPORT(186, void, png_set_user_limits, (png_structrp png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max)); PNG_EXPORT(187, png_uint_32, png_get_user_width_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(188, png_uint_32, png_get_user_height_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* Added in libpng-1.4.0 */ -PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, +PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)); PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* Added in libpng-1.4.1 */ -PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, +PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structrp png_ptr, png_alloc_size_t user_chunk_cache_max)); PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #endif #if defined(PNG_INCH_CONVERSIONS_SUPPORTED) PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_FP_EXPORT(196, float, png_get_x_offset_inches, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, - (png_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #endif -PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structrp png_ptr, + png_const_inforp info_ptr)) #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, - (png_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #endif # ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, - png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, +PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); # endif /* PNG_pHYs_SUPPORTED */ #endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ /* Added in libpng-1.4.0 */ #ifdef PNG_IO_STATE_SUPPORTED -PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); +PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_const_structrp png_ptr)); + +/* Removed from libpng 1.6; use png_get_io_chunk_type. */ +PNG_REMOVED(200, png_const_bytep, png_get_io_chunk_name, (png_structrp png_ptr), + PNG_DEPRECATED) -PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name, - (png_structp png_ptr), PNG_DEPRECATED); PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* The flags returned by png_get_io_state() are the following: */ # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ # define PNG_IO_READING 0x0001 /* currently reading */ @@ -2592,9 +2571,9 @@ PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); #endif -PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, +PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_const_structrp png_ptr, png_const_bytep buf)); /* No png_get_int_16 -- may be added if there's a real need for it. */ /* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ @@ -2618,32 +2597,481 @@ /* Inline macros to do direct reads of bytes from the input buffer. * The png_get_int_32() routine assumes we are using two's complement * format for negative values, which is almost certainly true. */ -# define png_get_uint_32(buf) \ +# define PNG_get_uint_32(buf) \ (((png_uint_32)(*(buf)) << 24) + \ ((png_uint_32)(*((buf) + 1)) << 16) + \ ((png_uint_32)(*((buf) + 2)) << 8) + \ ((png_uint_32)(*((buf) + 3)))) /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the * function) incorrectly returned a value of type png_uint_32. */ -# define png_get_uint_16(buf) \ +# define PNG_get_uint_16(buf) \ ((png_uint_16) \ (((unsigned int)(*(buf)) << 8) + \ ((unsigned int)(*((buf) + 1))))) -# define png_get_int_32(buf) \ +# define PNG_get_int_32(buf) \ ((png_int_32)((*(buf) & 0x80) \ ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ : (png_int_32)png_get_uint_32(buf))) + + /* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h, + * but defining a macro name prefixed with PNG_PREFIX. + */ +# ifndef PNG_PREFIX +# define png_get_uint_32(buf) PNG_get_uint_32(buf) +# define png_get_uint_16(buf) PNG_get_uint_16(buf) +# define png_get_int_32(buf) PNG_get_int_32(buf) +# endif +#else +# ifdef PNG_PREFIX + /* No macros; revert to the (redefined) function */ +# define PNG_get_uint_32 (png_get_uint_32) +# define PNG_get_uint_16 (png_get_uint_16) +# define PNG_get_int_32 (png_get_int_32) +# endif +#endif + +/******************************************************************************* + * SIMPLIFIED API + ******************************************************************************* + * + * Please read the documentation in libpng-manual.txt (TODO: write said + * documentation) if you don't understand what follows. + * + * The simplified API hides the details of both libpng and the PNG file format + * itself. It allows PNG files to be read into a very limited number of + * in-memory bitmap formats or to be written from the same formats. If these + * formats do not accomodate your needs then you can, and should, use the more + * sophisticated APIs above - these support a wide variety of in-memory formats + * and a wide variety of sophisticated transformations to those formats as well + * as a wide variety of APIs to manipulate ancilliary information. + * + * To read a PNG file using the simplified API: + * + * 1) Declare a 'png_image' structure (see below) on the stack and set the + * version field to PNG_IMAGE_VERSION. + * 2) Call the appropriate png_image_begin_read... function. + * 3) Set the png_image 'format' member to the required sample format. + * 4) Allocate a buffer for the image and, if required, the color-map. + * 5) Call png_image_finish_read to read the image and, if required, the + * color-map into your buffers. + * + * There are no restrictions on the format of the PNG input itself; all valid + * color types, bit depths, and interlace methods are acceptable, and the + * input image is transformed as necessary to the requested in-memory format + * during the png_image_finish_read() step. The only caveat is that if you + * request a color-mapped image from a PNG that is full-color or makes + * complex use of an alpha channel the transformation is extremely lossy and the + * result may look terrible. + * + * To write a PNG file using the simplified API: + * + * 1) Declare a 'png_image' structure on the stack and memset() it to all zero. + * 2) Initialize the members of the structure that describe the image, setting + * the 'format' member to the format of the image samples. + * 3) Call the appropriate png_image_write... function with a pointer to the + * image and, if necessary, the color-map to write the PNG data. + * + * png_image is a structure that describes the in-memory format of an image + * when it is being read or defines the in-memory format of an image that you + * need to write: + */ +#define PNG_IMAGE_VERSION 1 + +typedef struct png_control *png_controlp; +typedef struct +{ + png_controlp opaque; /* Initialize to NULL, free with png_image_free */ + png_uint_32 version; /* Set to PNG_IMAGE_VERSION */ + png_uint_32 width; /* Image width in pixels (columns) */ + png_uint_32 height; /* Image height in pixels (rows) */ + png_uint_32 format; /* Image format as defined below */ + png_uint_32 flags; /* A bit mask containing informational flags */ + png_uint_32 colormap_entries; + /* Number of entries in the color-map */ + + /* In the event of an error or warning the following field will be set to a + * non-zero value and the 'message' field will contain a '\0' terminated + * string with the libpng error or warning message. If both warnings and + * an error were encountered, only the error is recorded. If there + * are multiple warnings, only the first one is recorded. + * + * The upper 30 bits of this value are reserved, the low two bits contain + * a value as follows: + */ +# define PNG_IMAGE_WARNING 1 +# define PNG_IMAGE_ERROR 2 + /* + * The result is a two bit code such that a value more than 1 indicates + * a failure in the API just called: + * + * 0 - no warning or error + * 1 - warning + * 2 - error + * 3 - error preceded by warning + */ +# define PNG_IMAGE_FAILED(png_cntrl) ((((png_cntrl).warning_or_error)&0x03)>1) + + png_uint_32 warning_or_error; + + char message[64]; +} png_image, *png_imagep; + +/* The samples of the image have one to four channels whose components have + * original values in the range 0 to 1.0: + * + * 1: A single gray or luminance channel (G). + * 2: A gray/luminance channel and an alpha channel (GA). + * 3: Three red, green, blue color channels (RGB). + * 4: Three color channels and an alpha channel (RGBA). + * + * The components are encoded in one of two ways: + * + * a) As a small integer, value 0..255, contained in a single byte. For the + * alpha channel the original value is simply value/255. For the color or + * luminance channels the value is encoded according to the sRGB specification + * and matches the 8-bit format expected by typical display devices. + * + * The color/gray channels are not scaled (pre-multiplied) by the alpha + * channel and are suitable for passing to color management software. + * + * b) As a value in the range 0..65535, contained in a 2-byte integer. All + * channels can be converted to the original value by dividing by 65535; all + * channels are linear. Color channels use the RGB encoding (RGB end-points) of + * the sRGB specification. This encoding is identified by the + * PNG_FORMAT_FLAG_LINEAR flag below. + * + * When the simplified API needs to convert between sRGB and linear colorspaces, + * the actual sRGB transfer curve defined in the sRGB specification (see the + * article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2 + * approximation used elsewhere in libpng. + * + * When an alpha channel is present it is expected to denote pixel coverage + * of the color or luminance channels and is returned as an associated alpha + * channel: the color/gray channels are scaled (pre-multiplied) by the alpha + * value. + * + * The samples are either contained directly in the image data, between 1 and 8 + * bytes per pixel according to the encoding, or are held in a color-map indexed + * by bytes in the image data. In the case of a color-map the color-map entries + * are individual samples, encoded as above, and the image data has one byte per + * pixel to select the relevant sample from the color-map. + */ + +/* PNG_FORMAT_* + * + * #defines to be used in png_image::format. Each #define identifies a + * particular layout of sample data and, if present, alpha values. There are + * separate defines for each of the two component encodings. + * + * A format is built up using single bit flag values. All combinations are + * valid. Formats can be built up from the flag values or you can use one of + * the predefined values below. When testing formats always use the FORMAT_FLAG + * macros to test for individual features - future versions of the library may + * add new flags. + * + * When reading or writing color-mapped images the format should be set to the + * format of the entries in the color-map then png_image_{read,write}_colormap + * called to read or write the color-map and set the format correctly for the + * image data. Do not set the PNG_FORMAT_FLAG_COLORMAP bit directly! + * + * NOTE: libpng can be built with particular features disabled, if you see + * compiler errors because the definition of one of the following flags has been + * compiled out it is because libpng does not have the required support. It is + * possible, however, for the libpng configuration to enable the format on just + * read or just write; in that case you may see an error at run time. You can + * guard against this by checking for the definition of the appropriate + * "_SUPPORTED" macro, one of: + * + * PNG_SIMPLIFIED_{READ,WRITE}_{BGR,AFIRST}_SUPPORTED + */ +#define PNG_FORMAT_FLAG_ALPHA 0x01U /* format with an alpha channel */ +#define PNG_FORMAT_FLAG_COLOR 0x02U /* color format: otherwise grayscale */ +#define PNG_FORMAT_FLAG_LINEAR 0x04U /* 2 byte channels else 1 byte */ +#define PNG_FORMAT_FLAG_COLORMAP 0x08U /* image data is color-mapped */ + +#ifdef PNG_FORMAT_BGR_SUPPORTED +# define PNG_FORMAT_FLAG_BGR 0x10U /* BGR colors, else order is RGB */ +#endif + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED +# define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */ #endif +/* Commonly used formats have predefined macros. + * + * First the single byte (sRGB) formats: + */ +#define PNG_FORMAT_GRAY 0 +#define PNG_FORMAT_GA PNG_FORMAT_FLAG_ALPHA +#define PNG_FORMAT_AG (PNG_FORMAT_GA|PNG_FORMAT_FLAG_AFIRST) +#define PNG_FORMAT_RGB PNG_FORMAT_FLAG_COLOR +#define PNG_FORMAT_BGR (PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_BGR) +#define PNG_FORMAT_RGBA (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_ARGB (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_AFIRST) +#define PNG_FORMAT_BGRA (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_ABGR (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_AFIRST) + +/* Then the linear 2-byte formats. When naming these "Y" is used to + * indicate a luminance (gray) channel. + */ +#define PNG_FORMAT_LINEAR_Y PNG_FORMAT_FLAG_LINEAR +#define PNG_FORMAT_LINEAR_Y_ALPHA (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_LINEAR_RGB (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR) +#define PNG_FORMAT_LINEAR_RGB_ALPHA \ + (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA) + +/* With color-mapped formats the image data is one byte for each pixel, the byte + * is an index into the color-map which is formatted as above. To obtain a + * color-mapped format it is sufficient just to add the PNG_FOMAT_FLAG_COLORMAP + * to one of the above definitions, or you can use one of the definitions below. + */ +#define PNG_FORMAT_RGB_COLORMAP (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_BGR_COLORMAP (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_RGBA_COLORMAP (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_ARGB_COLORMAP (PNG_FORMAT_ARGB|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_BGRA_COLORMAP (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_ABGR_COLORMAP (PNG_FORMAT_ABGR|PNG_FORMAT_FLAG_COLORMAP) + +/* PNG_IMAGE macros + * + * These are convenience macros to derive information from a png_image + * structure. The PNG_IMAGE_SAMPLE_ macros return values appropriate to the + * actual image sample values - either the entries in the color-map or the + * pixels in the image. The PNG_IMAGE_PIXEL_ macros return corresponding values + * for the pixels and will always return 1 for color-mapped formats. The + * remaining macros return information about the rows in the image and the + * complete image. + * + * NOTE: All the macros that take a png_image::format parameter are compile time + * constants if the format parameter is, itself, a constant. Therefore these + * macros can be used in array declarations and case labels where required. + * Similarly the macros are also pre-processor constants (sizeof is not used) so + * they can be used in #if tests. + * + * First the information about the samples. + */ +#define PNG_IMAGE_SAMPLE_CHANNELS(fmt)\ + (((fmt)&(PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA))+1) + /* Return the total number of channels in a given format: 1..4 */ + +#define PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)\ + ((((fmt) & PNG_FORMAT_FLAG_LINEAR) >> 2)+1) + /* Return the size in bytes of a single component of a pixel or color-map + * entry (as appropriate) in the image: 1 or 2. + */ + +#define PNG_IMAGE_SAMPLE_SIZE(fmt)\ + (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)) + /* This is the size of the sample data for one sample. If the image is + * color-mapped it is the size of one color-map entry (and image pixels are + * one byte in size), otherwise it is the size of one image pixel. + */ + +#define PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(fmt)\ + (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * 256) + /* The maximum size of the color-map required by the format expressed in a + * count of components. This can be used to compile-time allocate a + * color-map: + * + * png_uint_16 colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(linear_fmt)]; + * + * png_byte colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(sRGB_fmt)]; + * + * Alternatively use the PNG_IMAGE_COLORMAP_SIZE macro below to use the + * information from one of the png_image_begin_read_ APIs and dynamically + * allocate the required memory. + */ + +/* Corresponding information about the pixels */ +#define PNG_IMAGE_PIXEL_(test,fmt)\ + (((fmt)&PNG_FORMAT_FLAG_COLORMAP)?1:test(fmt)) + +#define PNG_IMAGE_PIXEL_CHANNELS(fmt)\ + PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS,fmt) + /* The number of separate channels (components) in a pixel; 1 for a + * color-mapped image. + */ + +#define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt)\ + PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE,fmt) + /* The size, in bytes, of each component in a pixel; 1 for a color-mapped + * image. + */ + +#define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE,fmt) + /* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */ + +/* Information about the whole row, or whole image */ +#define PNG_IMAGE_ROW_STRIDE(image)\ + (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width) + /* Return the total number of components in a single row of the image; this + * is the minimum 'row stride', the minimum count of components between each + * row. For a color-mapped image this is the minimum number of bytes in a + * row. + */ + +#define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\ + (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride)) + /* Return the size, in bytes, of an image buffer given a png_image and a row + * stride - the number of components to leave space for in each row. + */ + +#define PNG_IMAGE_SIZE(image)\ + PNG_IMAGE_BUFFER_SIZE(image, PNG_IMAGE_ROW_STRIDE(image)) + /* Return the size, in bytes, of the image in memory given just a png_image; + * the row stride is the minimum stride required for the image. + */ + +#define PNG_IMAGE_COLORMAP_SIZE(image)\ + (PNG_IMAGE_SAMPLE_SIZE((image).format) * (image).colormap_entries) + /* Return the size, in bytes, of the color-map of this image. If the image + * format is not a color-map format this will return a size sufficient for + * 256 entries in the given format; check PNG_FORMAT_FLAG_COLORMAP if + * you don't want to allocate a color-map in this case. + */ + +/* PNG_IMAGE_FLAG_* + * + * Flags containing additional information about the image are held in the + * 'flags' field of png_image. + */ +#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01 + /* This indicates the the RGB values of the in-memory bitmap do not + * correspond to the red, green and blue end-points defined by sRGB. + */ + +#define PNG_IMAGE_FLAG_FAST 0x02 + /* On write emphasise speed over compression; the resultant PNG file will be + * larger but will be produced significantly faster, particular for large + * images. Do not use this option for images which will be distributed, only + * used it when producing intermediate files that will be read back in + * repeatedly. For a typical 24-bit image the option will double the read + * speed at the cost of increasing the image size by 25%, however for many + * more compressible images the PNG file can be 10 times larger with only a + * slight speed gain. + */ + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +/* READ APIs + * --------- + * + * The png_image passed to the read APIs must have been initialized by setting + * the png_controlp field 'opaque' to NULL (or, safer, memset the whole thing.) + */ +#ifdef PNG_STDIO_SUPPORTED +PNG_EXPORT(234, int, png_image_begin_read_from_file, (png_imagep image, + const char *file_name)); + /* The named file is opened for read and the image header is filled in + * from the PNG header in the file. + */ + +PNG_EXPORT(235, int, png_image_begin_read_from_stdio, (png_imagep image, + FILE* file)); + /* The PNG header is read from the stdio FILE object. */ +#endif /* PNG_STDIO_SUPPORTED */ + +PNG_EXPORT(236, int, png_image_begin_read_from_memory, (png_imagep image, + png_const_voidp memory, png_size_t size)); + /* The PNG header is read from the given memory buffer. */ + +PNG_EXPORT(237, int, png_image_finish_read, (png_imagep image, + png_const_colorp background, void *buffer, png_int_32 row_stride, + void *colormap)); + /* Finish reading the image into the supplied buffer and clean up the + * png_image structure. + * + * row_stride is the step, in byte or 2-byte units as appropriate, + * between adjacent rows. A positive stride indicates that the top-most row + * is first in the buffer - the normal top-down arrangement. A negative + * stride indicates that the bottom-most row is first in the buffer. + * + * background need only be supplied if an alpha channel must be removed from + * a png_byte format and the removal is to be done by compositing on a solid + * color; otherwise it may be NULL and any composition will be done directly + * onto the buffer. The value is an sRGB color to use for the background, + * for grayscale output the green channel is used. + * + * background must be supplied when an alpha channel must be removed from a + * single byte color-mapped output format, in other words if: + * + * 1) The original format from png_image_begin_read_from_* had + * PNG_FORMAT_FLAG_ALPHA set. + * 2) The format set by the application does not. + * 3) The format set by the application has PNG_FORMAT_FLAG_COLORMAP set and + * PNG_FORMAT_FLAG_LINEAR *not* set. + * + * For linear output removing the alpha channel is always done by compositing + * on black and background is ignored.: + * + * colormap must be supplied when PNG_FORMAT_FLAG_COLORMAP is set. It must + * be at least the size (in bytes) returned by PNG_IMAGE_COLORMAP_SIZE. + * image->colormap_entries will be updated to the actual number of entries + * written to the colormap; this may be less than the original value. + */ + +PNG_EXPORT(238, void, png_image_free, (png_imagep image)); + /* Free any data allocated by libpng in image->opaque, setting the pointer to + * NULL. May be called at any time after the structure is initialized. + */ +#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */ + +#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED +/* WRITE APIS + * ---------- + * For write you must initialize a png_image structure to describe the image to + * be written. To do this use memset to set the whole structure to 0 then + * initialize fields describing your image. + * + * version: must be set to PNG_IMAGE_VERSION + * opaque: must be initialized to NULL + * width: image width in pixels + * height: image height in rows + * format: the format of the data (image and color-map) you wish to write + * flags: set to 0 unless one of the defined flags applies; set + * PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB for color format images where the RGB + * values do not correspond to the colors in sRGB. + * colormap_entries: set to the number of entries in the color-map (0 to 256) + */ +PNG_EXPORT(239, int, png_image_write_to_file, (png_imagep image, + const char *file, int convert_to_8bit, const void *buffer, + png_int_32 row_stride, const void *colormap)); + /* Write the image to the named file. */ + +PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file, + int convert_to_8_bit, const void *buffer, png_int_32 row_stride, + const void *colormap)); + /* Write the image to the given (FILE*). */ + +/* With both write APIs if image is in one of the linear formats with 16-bit + * data then setting convert_to_8_bit will cause the output to be an 8-bit PNG + * gamma encoded according to the sRGB specification, otherwise a 16-bit linear + * encoded PNG file is written. + * + * With color-mapped data formats the colormap parameter point to a color-map + * with at least image->colormap_entries encoded in the specified format. If + * the format is linear the written PNG color-map will be converted to sRGB + * regardless of the convert_to_8_bit flag. + * + * With all APIs row_stride is handled as in the read APIs - it is the spacing + * from one row to the next in component sized units (1 or 2 bytes) and if + * negative indicates a bottom-up row layout in the buffer. + * + * Note that the write API does not support interlacing or sub-8-bit pixels. + */ +#endif /* PNG_SIMPLIFIED_WRITE_SUPPORTED */ +/******************************************************************************* + * END OF SIMPLIFIED API + ******************************************************************************/ + #if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED) -PNG_EXPORT(234, void, png_set_check_for_invalid_index, (png_structp png_ptr, - int allowed)); +PNG_EXPORT(242, void, png_set_check_for_invalid_index, + (png_structrp png_ptr, int allowed)); #endif /* Maintainer: Put new public prototypes here ^, in libpng.3, and project * defs @@ -2653,9 +3081,9 @@ * one to use is one more than this.) Maintainer, remember to add an entry to * scripts/symbols.def as well. */ #ifdef PNG_EXPORT_LAST_ORDINAL - PNG_EXPORT_LAST_ORDINAL(234); + PNG_EXPORT_LAST_ORDINAL(242); #endif #ifdef __cplusplus } diff -ru4NwbB libpng-1.5.10/pngconf.h libpng-1.6.0beta22/pngconf.h --- libpng-1.5.10/pngconf.h 2012-03-29 00:06:54.486609529 -0500 +++ libpng-1.6.0beta22/pngconf.h 2012-05-23 12:30:56.047019040 -0500 @@ -21,35 +21,71 @@ #ifndef PNGCONF_H #define PNGCONF_H -#ifndef PNG_BUILDING_SYMBOL_TABLE -/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C - * definition file for machine specific limits, this may impact the - * correctness of the definitons below (see uses of INT_MAX). - */ -# ifndef PNG_NO_LIMITS_H -# include +/* To do: Do all of this in scripts/pnglibconf.dfa */ +#ifdef PNG_SAFE_LIMITS_SUPPORTED +# ifdef PNG_USER_WIDTH_MAX +# undef PNG_USER_WIDTH_MAX +# define PNG_USER_WIDTH_MAX 1000000L +# endif +# ifdef PNG_USER_HEIGHT_MAX +# undef PNG_USER_HEIGHT_MAX +# define PNG_USER_HEIGHT_MAX 1000000L +# endif +# ifdef PNG_USER_CHUNK_MALLOC_MAX +# undef PNG_USER_CHUNK_MALLOC_MAX +# define PNG_USER_CHUNK_MALLOC_MAX 4000000L +# endif +# ifdef PNG_USER_CHUNK_CACHE_MAX +# undef PNG_USER_CHUNK_CACHE_MAX +# define PNG_USER_CHUNK_CACHE_MAX 128 # endif +#endif + +#ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */ -/* For the memory copy APIs (i.e. the standard definitions of these), - * because this file defines png_memcpy and so on the base APIs must - * be defined here. +/* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C + * compiler for correct compilation. The following header files are required by + * the standard. If your compiler doesn't provide these header files, or they + * do not match the standard, you will need to provide/improve them. */ -# ifdef BSD -# include -# else -# include -# endif +#include +#include -/* For png_FILE_p - this provides the standard definition of a - * FILE +/* Library header files. These header files are all defined by ISOC90; libpng + * expects conformant implementations, however, an ISOC90 conformant system need + * not provide these header files if the functionality cannot be implemented. + * In this case it will be necessary to disable the relevant parts of libpng in + * the build of pnglibconf.h. + * + * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not + * include this unnecessary header file. */ + # ifdef PNG_STDIO_SUPPORTED + /* Required for the definition of FILE: */ # include # endif + +#ifdef PNG_SETJMP_SUPPORTED + /* Required for the definition of jmp_buf and the declaration of longjmp: */ +# include +#endif + +#ifdef PNG_CONVERT_tIME_SUPPORTED + /* Required for struct tm: */ +# include #endif +#endif /* PNG_BUILDING_SYMBOL_TABLE */ + +/* Prior to 1.6.0 it was possible to turn off 'const' in declarations using + * PNG_NO_CONST; this is no longer supported except for data declarations which + * apparently still cause problems in 2011 on some compilers. + */ +#define PNG_CONST const /* backward compatibility only */ + /* This controls optimization of the reading of 16 and 32 bit values * from PNG files. It can be set on a per-app-file basis - it * just changes whether a macro is used when the function is called. * The library builder sets the default; if read functions are not @@ -71,30 +107,15 @@ * below) but still have compiler specific implementations, others * may be changed on a per-file basis when compiling against libpng. */ -/* The PNGARG macro protects us against machines that don't have function - * prototypes (ie K&R style headers). If your compiler does not handle - * function prototypes, define this macro and use the included ansi2knr. - * I've always been able to use _NO_PROTO as the indicator, but you may - * need to drag the empty declaration out in front of here, or change the - * ifdef to suit your own needs. +/* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect + * against legacy (pre ISOC90) compilers that did not understand function + * prototypes. It is not required for modern C compilers. */ #ifndef PNGARG - -# ifdef OF /* zlib prototype munger */ -# define PNGARG(arglist) OF(arglist) -# else - -# ifdef _NO_PROTO -# define PNGARG(arglist) () -# else # define PNGARG(arglist) arglist -# endif /* _NO_PROTO */ - -# endif /* OF */ - -#endif /* PNGARG */ +#endif /* Function calling conventions. * ============================= * Normally it is not necessary to specify to the compiler how to call @@ -218,9 +239,9 @@ # endif /* compiler/api */ /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) - ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed +# error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed" # endif # if (defined(_MSC_VER) && _MSC_VER < 800) ||\ (defined(__BORLANDC__) && __BORLANDC__ < 0x500) @@ -332,11 +353,12 @@ #endif #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED /* Support for compiler specific function attributes. These are used - * so that where compiler support is available incorrect use of API + * so that where compiler support is available, incorrect use of API * functions in png.h will generate compiler warnings. Added at libpng - * version 1.2.41. + * version 1.2.41. Disabling these removes the warnings but may also produce + * less efficient code. */ # if defined(__GNUC__) # ifndef PNG_USE_RESULT # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) @@ -358,11 +380,13 @@ # define PNG_PRIVATE \ __attribute__((__deprecated__)) # endif # endif -# endif /* __GNUC__ */ +# ifndef PNG_RESTRICT +# define PNG_RESTRICT __restrict +# endif -# if defined(_MSC_VER) && (_MSC_VER >= 1300) +# elif defined(_MSC_VER) && (_MSC_VER >= 1300) # ifndef PNG_USE_RESULT # define PNG_USE_RESULT /* not supported */ # endif # ifndef PNG_NORETURN @@ -378,8 +402,18 @@ # endif # ifndef PNG_PRIVATE # define PNG_PRIVATE __declspec(deprecated) # endif +# ifndef PNG_RESTRICT +# if (_MSC_VER >= 1400) +# define PNG_RESTRICT __restrict +# endif +# endif + +# elif defined(__WATCOMC__) +# ifndef PNG_RESTRICT +# define PNG_RESTRICT __restrict +# endif # endif /* _MSC_VER */ #endif /* PNG_PEDANTIC_WARNINGS */ #ifndef PNG_DEPRECATED @@ -399,198 +433,182 @@ #endif #ifndef PNG_FP_EXPORT /* A floating point API. */ # ifdef PNG_FLOATING_POINT_SUPPORTED # define PNG_FP_EXPORT(ordinal, type, name, args)\ - PNG_EXPORT(ordinal, type, name, args) + PNG_EXPORT(ordinal, type, name, args); # else /* No floating point APIs */ # define PNG_FP_EXPORT(ordinal, type, name, args) # endif #endif #ifndef PNG_FIXED_EXPORT /* A fixed point API. */ # ifdef PNG_FIXED_POINT_SUPPORTED # define PNG_FIXED_EXPORT(ordinal, type, name, args)\ - PNG_EXPORT(ordinal, type, name, args) + PNG_EXPORT(ordinal, type, name, args); # else /* No fixed point APIs */ # define PNG_FIXED_EXPORT(ordinal, type, name, args) # endif #endif -/* The following uses const char * instead of char * for error - * and warning message functions, so some compilers won't complain. - * If you do not want to use const, define PNG_NO_CONST here. - * - * This should not change how the APIs are called, so it can be done - * on a per-file basis in the application. - */ -#ifndef PNG_CONST -# ifndef PNG_NO_CONST -# define PNG_CONST const +#ifndef PNG_BUILDING_SYMBOL_TABLE +/* Some typedefs to get us started. These should be safe on most of the common + * platforms. + * + * png_uint_32 and png_int_32 may, currently, be larger than required to hold a + * 32-bit value however this is not normally advisable. + * + * png_uint_16 and png_int_16 should always be two bytes in size - this is + * verified at library build time. + * + * png_byte must always be one byte in size. + * + * The checks below use constants from limits.h, as defined by the ISOC90 + * standard. + */ +#if CHAR_BIT == 8 && UCHAR_MAX == 255 + typedef unsigned char png_byte; # else -# define PNG_CONST +# error "libpng requires 8 bit bytes" # endif + +#if INT_MIN == -32768 && INT_MAX == 32767 + typedef int png_int_16; +#elif SHRT_MIN == -32768 && SHRT_MAX == 32767 + typedef short png_int_16; +#else +# error "libpng requires a signed 16 bit type" #endif -/* Some typedefs to get us started. These should be safe on most of the - * common platforms. The typedefs should be at least as large as the - * numbers suggest (a png_uint_32 must be at least 32 bits long), but they - * don't have to be exactly that size. Some compilers dislike passing - * unsigned shorts as function parameters, so you may be better off using - * unsigned int for png_uint_16. - */ +#if UINT_MAX == 65535 + typedef unsigned int png_uint_16; +#elif USHRT_MAX == 65535 + typedef unsigned short png_uint_16; +#else +# error "libpng requires an unsigned 16 bit type" +#endif -#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL) -typedef unsigned int png_uint_32; +#if INT_MIN < -2147483646 && INT_MAX > 2147483646 typedef int png_int_32; +#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646 + typedef long int png_int_32; #else -typedef unsigned long png_uint_32; -typedef long png_int_32; +# error "libpng requires a signed 32 bit (or more) type" #endif -typedef unsigned short png_uint_16; -typedef short png_int_16; -typedef unsigned char png_byte; -#ifdef PNG_NO_SIZE_T -typedef unsigned int png_size_t; +#if UINT_MAX > 4294967294 + typedef unsigned int png_uint_32; +#elif ULONG_MAX > 4294967294 + typedef unsigned long int png_uint_32; #else -typedef size_t png_size_t; +# error "libpng requires an unsigned 32 bit (or more) type" #endif -#define png_sizeof(x) (sizeof (x)) -/* The following is needed for medium model support. It cannot be in the - * pngpriv.h header. Needs modification for other compilers besides - * MSC. Model independent support declares all arrays and pointers to be - * large using the far keyword. The zlib version used must also support - * model independent data. As of version zlib 1.0.4, the necessary changes - * have been made in zlib. The USE_FAR_KEYWORD define triggers other - * changes that are needed. (Tim Wegner) +/* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however, + * requires an ISOC90 compiler and relies on consistent behavior of sizeof. */ +typedef size_t png_size_t; +typedef ptrdiff_t png_ptrdiff_t; -/* Separate compiler dependencies (problem here is that zlib.h always - * defines FAR. (SJT) - */ -#ifdef __BORLANDC__ -# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) -# define LDATA 1 -# else -# define LDATA 0 -# endif - /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ -# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) -# define PNG_MAX_MALLOC_64K /* only used in build */ -# if (LDATA != 1) -# ifndef FAR -# define FAR __far -# endif -# define USE_FAR_KEYWORD -# endif /* LDATA != 1 */ - /* Possibly useful for moving data out of default segment. - * Uncomment it if you want. Could also define FARDATA as - * const if your compiler supports it. (SJT) -# define FARDATA FAR +/* libpng needs to know the maximum value of 'size_t' and this controls the + * definition of png_alloc_size_t, below. This maximum value of size_t limits + * but does not control the maximum allocations the library makes - there is + * direct application control of this through png_set_user_limits(). */ -# endif /* __WIN32__, __FLAT__, __CYGWIN__ */ -#endif /* __BORLANDC__ */ - - -/* Suggest testing for specific compiler first before testing for - * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, - * making reliance oncertain keywords suspect. (SJT) +#ifndef PNG_SMALL_SIZE_T + /* Compiler specific tests for systems where size_t is known to be less than + * 32 bits (some of these systems may no longer work because of the lack of + * 'far' support; see above.) */ - -/* MSC Medium model */ -#ifdef FAR -# ifdef M_I86MM -# define USE_FAR_KEYWORD -# define FARDATA FAR -# include +# if (defined(__TURBOC__) && !defined(__FLAT__)) ||\ + (defined(_MSC_VER) && defined(MAXSEG_64K)) +# define PNG_SMALL_SIZE_T # endif #endif -/* SJT: default case */ -#ifndef FAR -# define FAR +/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no + * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to + * png_alloc_size_t are not necessary; in fact, it is recommended not to use + * them at all so that the compiler can complain when something turns out to be + * problematic. + * + * Casts in the other direction (from png_alloc_size_t to png_size_t or + * png_uint_32) should be explicitly applied; however, we do not expect to + * encounter practical situations that require such conversions. + * + * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than + * 4294967295 - i.e. less than the maximum value of png_uint_32. + */ +#ifdef PNG_SMALL_SIZE_T + typedef png_uint_32 png_alloc_size_t; +#else + typedef png_size_t png_alloc_size_t; #endif -/* At this point FAR is always defined */ -#ifndef FARDATA -# define FARDATA -#endif +/* This macro makes the sizeof operator look and behave like a function, except + * that it can take a type without the enclosing () as an argument so long as + * the type contains no "," characters. + */ +#define png_sizeof(x) (sizeof (x)) + +/* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler + * implementations of Intel CPU specific support of user-mode segmented address + * spaces, where 16-bit pointers address more than 65536 bytes of memory using + * separate 'segment' registers. The implementation requires two different + * types of pointer (only one of which includes the segment value.) + * + * If required this support is available in version 1.2 of libpng and may be + * available in versions through 1.5, although the correctness of the code has + * not been verified recently. + */ -/* Typedef for floating-point numbers that are converted - * to fixed-point with a multiple of 100,000, e.g., gamma +/* Typedef for floating-point numbers that are converted to fixed-point with a + * multiple of 100,000, e.g., gamma */ typedef png_int_32 png_fixed_point; /* Add typedefs for pointers */ -typedef void FAR * png_voidp; -typedef PNG_CONST void FAR * png_const_voidp; -typedef png_byte FAR * png_bytep; -typedef PNG_CONST png_byte FAR * png_const_bytep; -typedef png_uint_32 FAR * png_uint_32p; -typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p; -typedef png_int_32 FAR * png_int_32p; -typedef PNG_CONST png_int_32 FAR * png_const_int_32p; -typedef png_uint_16 FAR * png_uint_16p; -typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p; -typedef png_int_16 FAR * png_int_16p; -typedef PNG_CONST png_int_16 FAR * png_const_int_16p; -typedef char FAR * png_charp; -typedef PNG_CONST char FAR * png_const_charp; -typedef png_fixed_point FAR * png_fixed_point_p; -typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p; -typedef png_size_t FAR * png_size_tp; -typedef PNG_CONST png_size_t FAR * png_const_size_tp; +typedef void * png_voidp; +typedef const void * png_const_voidp; +typedef png_byte * png_bytep; +typedef const png_byte * png_const_bytep; +typedef png_uint_32 * png_uint_32p; +typedef const png_uint_32 * png_const_uint_32p; +typedef png_int_32 * png_int_32p; +typedef const png_int_32 * png_const_int_32p; +typedef png_uint_16 * png_uint_16p; +typedef const png_uint_16 * png_const_uint_16p; +typedef png_int_16 * png_int_16p; +typedef const png_int_16 * png_const_int_16p; +typedef char * png_charp; +typedef const char * png_const_charp; +typedef png_fixed_point * png_fixed_point_p; +typedef const png_fixed_point * png_const_fixed_point_p; +typedef png_size_t * png_size_tp; +typedef const png_size_t * png_const_size_tp; #ifdef PNG_STDIO_SUPPORTED typedef FILE * png_FILE_p; #endif #ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * png_doublep; -typedef PNG_CONST double FAR * png_const_doublep; +typedef double * png_doublep; +typedef const double * png_const_doublep; #endif /* Pointers to pointers; i.e. arrays */ -typedef png_byte FAR * FAR * png_bytepp; -typedef png_uint_32 FAR * FAR * png_uint_32pp; -typedef png_int_32 FAR * FAR * png_int_32pp; -typedef png_uint_16 FAR * FAR * png_uint_16pp; -typedef png_int_16 FAR * FAR * png_int_16pp; -typedef PNG_CONST char FAR * FAR * png_const_charpp; -typedef char FAR * FAR * png_charpp; -typedef png_fixed_point FAR * FAR * png_fixed_point_pp; +typedef png_byte * * png_bytepp; +typedef png_uint_32 * * png_uint_32pp; +typedef png_int_32 * * png_int_32pp; +typedef png_uint_16 * * png_uint_16pp; +typedef png_int_16 * * png_int_16pp; +typedef const char * * png_const_charpp; +typedef char * * png_charpp; +typedef png_fixed_point * * png_fixed_point_pp; #ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * FAR * png_doublepp; +typedef double * * png_doublepp; #endif /* Pointers to pointers to pointers; i.e., pointer to array */ -typedef char FAR * FAR * FAR * png_charppp; +typedef char * * * png_charppp; -/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, - * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32 - * to png_alloc_size_t are not necessary; in fact, it is recommended - * not to use them at all so that the compiler can complain when something - * turns out to be problematic. - * Casts in the other direction (from png_alloc_size_t to png_size_t or - * png_uint_32) should be explicitly applied; however, we do not expect - * to encounter practical situations that require such conversions. - */ -#if defined(__TURBOC__) && !defined(__FLAT__) - typedef unsigned long png_alloc_size_t; -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - typedef unsigned long png_alloc_size_t; -# else - /* This is an attempt to detect an old Windows system where (int) is - * actually 16 bits, in that case png_malloc must have an argument with a - * bigger size to accomodate the requirements of the library. - */ -# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \ - (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL) - typedef DWORD png_alloc_size_t; -# else - typedef png_size_t png_alloc_size_t; -# endif -# endif -#endif +#endif /* PNG_BUILDING_SYMBOL_TABLE */ #endif /* PNGCONF_H */ diff -ru4NwbB libpng-1.5.10/pngerror.c libpng-1.6.0beta22/pngerror.c --- libpng-1.5.10/pngerror.c 2012-03-29 00:06:54.543294586 -0500 +++ libpng-1.6.0beta22/pngerror.c 2012-05-23 12:30:56.108507068 -0500 @@ -1,8 +1,8 @@ /* pngerror.c - stub functions for i/o and memory allocation * - * Last changed in libpng 1.5.8 [February 1, 2011] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -19,14 +19,14 @@ #include "pngpriv.h" #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -static PNG_FUNCTION(void, png_default_error,PNGARG((png_structp png_ptr, +static PNG_FUNCTION(void, png_default_error,PNGARG((png_const_structrp png_ptr, png_const_charp error_message)),PNG_NORETURN); #ifdef PNG_WARNINGS_SUPPORTED static void /* PRIVATE */ -png_default_warning PNGARG((png_structp png_ptr, +png_default_warning PNGARG((png_const_structrp png_ptr, png_const_charp warning_message)); #endif /* PNG_WARNINGS_SUPPORTED */ /* This function is called whenever there is a fatal error. This function @@ -35,9 +35,10 @@ * to replace the error function at run-time. */ #ifdef PNG_ERROR_TEXT_SUPPORTED PNG_FUNCTION(void,PNGAPI -png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) +png_error,(png_const_structrp png_ptr, png_const_charp error_message), + PNG_NORETURN) { #ifdef PNG_ERROR_NUMBERS_SUPPORTED char msg[16]; if (png_ptr != NULL) @@ -78,25 +79,25 @@ } } #endif if (png_ptr != NULL && png_ptr->error_fn != NULL) - (*(png_ptr->error_fn))(png_ptr, error_message); + (*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr), error_message); /* If the custom handler doesn't exist, or if it returns, use the default handler, which will not return. */ png_default_error(png_ptr, error_message); } #else PNG_FUNCTION(void,PNGAPI -png_err,(png_structp png_ptr),PNG_NORETURN) +png_err,(png_const_structrp png_ptr),PNG_NORETURN) { /* Prior to 1.5.2 the error_fn received a NULL pointer, expressed * erroneously as '\0', instead of the empty string "". This was * apparently an error, introduced in libpng-1.2.20, and png_default_error * will crash in this case. */ if (png_ptr != NULL && png_ptr->error_fn != NULL) - (*(png_ptr->error_fn))(png_ptr, ""); + (*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr), ""); /* If the custom handler doesn't exist, or if it returns, use the default handler, which will not return. */ png_default_error(png_ptr, ""); @@ -210,9 +211,9 @@ * you should supply a replacement warning function and use * png_set_error_fn() to replace the warning function at run-time. */ void PNGAPI -png_warning(png_structp png_ptr, png_const_charp warning_message) +png_warning(png_const_structrp png_ptr, png_const_charp warning_message) { int offset = 0; if (png_ptr != NULL) { @@ -229,9 +230,10 @@ } } } if (png_ptr != NULL && png_ptr->warning_fn != NULL) - (*(png_ptr->warning_fn))(png_ptr, warning_message + offset); + (*(png_ptr->warning_fn))(png_constcast(png_structrp,png_ptr), + warning_message + offset); else png_default_warning(png_ptr, warning_message + offset); } @@ -277,9 +279,9 @@ png_warning_parameter(p, number, str); } void -png_formatted_warning(png_structp png_ptr, png_warning_parameters p, +png_formatted_warning(png_const_structrp png_ptr, png_warning_parameters p, png_const_charp message) { /* The internal buffer is just 192 bytes - enough for all our messages, * overflow doesn't happen because this code checks! If someone figures @@ -345,26 +347,61 @@ /* i is always less than (sizeof msg), so: */ msg[i] = '\0'; - /* And this is the formatted message, it may be larger than - * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these are - * not (currently) formatted. + /* And this is the formatted message. It may be larger than + * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these + * are not (currently) formatted. */ png_warning(png_ptr, msg); } #endif /* PNG_WARNINGS_SUPPORTED */ #ifdef PNG_BENIGN_ERRORS_SUPPORTED void PNGAPI -png_benign_error(png_structp png_ptr, png_const_charp error_message) +png_benign_error(png_const_structrp png_ptr, png_const_charp error_message) { if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) + { +# ifdef PNG_READ_SUPPORTED + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 && + png_ptr->chunk_name != 0) + png_chunk_warning(png_ptr, error_message); + else +# endif png_warning(png_ptr, error_message); + } + else + { +# ifdef PNG_READ_SUPPORTED + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 && + png_ptr->chunk_name != 0) + png_chunk_error(png_ptr, error_message); + else +# endif png_error(png_ptr, error_message); } -#endif +} + +void /* PRIVATE */ +png_app_warning(png_const_structrp png_ptr, png_const_charp error_message) +{ + if (png_ptr->flags & PNG_FLAG_APP_WARNINGS_WARN) + png_warning(png_ptr, error_message); + else + png_error(png_ptr, error_message); +} + +void /* PRIVATE */ +png_app_error(png_const_structrp png_ptr, png_const_charp error_message) +{ + if (png_ptr->flags & PNG_FLAG_APP_ERRORS_WARN) + png_warning(png_ptr, error_message); + else + png_error(png_ptr, error_message); +} +#endif /* BENIGN_ERRORS */ /* These utilities are used internally to build an error message that relates * to the current chunk. The chunk name comes from png_ptr->chunk_name, * this is used to prefix the message. The message is limited in length @@ -379,9 +416,9 @@ #define PNG_MAX_ERROR_TEXT 64 #if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED) static void /* PRIVATE */ -png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp +png_format_buffer(png_const_structrp png_ptr, png_charp buffer, png_const_charp error_message) { png_uint_32 chunk_name = png_ptr->chunk_name; int iout = 0, ishift = 24; @@ -425,9 +462,9 @@ #endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */ #if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) PNG_FUNCTION(void,PNGAPI -png_chunk_error,(png_structp png_ptr, png_const_charp error_message), +png_chunk_error,(png_const_structrp png_ptr, png_const_charp error_message), PNG_NORETURN) { char msg[18+PNG_MAX_ERROR_TEXT]; if (png_ptr == NULL) @@ -442,9 +479,9 @@ #endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */ #ifdef PNG_WARNINGS_SUPPORTED void PNGAPI -png_chunk_warning(png_structp png_ptr, png_const_charp warning_message) +png_chunk_warning(png_const_structrp png_ptr, png_const_charp warning_message) { char msg[18+PNG_MAX_ERROR_TEXT]; if (png_ptr == NULL) png_warning(png_ptr, warning_message); @@ -459,9 +496,9 @@ #ifdef PNG_READ_SUPPORTED #ifdef PNG_BENIGN_ERRORS_SUPPORTED void PNGAPI -png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message) +png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp error_message) { if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) png_chunk_warning(png_ptr, error_message); @@ -473,9 +510,9 @@ #ifdef PNG_ERROR_TEXT_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED PNG_FUNCTION(void, -png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN) +png_fixed_error,(png_const_structrp png_ptr, png_const_charp name),PNG_NORETURN) { # define fixed_message "fixed point overflow in " # define fixed_message_ln ((sizeof fixed_message)-1) int iin; @@ -497,16 +534,113 @@ /* This API only exists if ANSI-C style error handling is used, * otherwise it is necessary for png_default_error to be overridden. */ jmp_buf* PNGAPI -png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn, +png_set_longjmp_fn(png_structrp png_ptr, png_longjmp_ptr longjmp_fn, size_t jmp_buf_size) { - if (png_ptr == NULL || jmp_buf_size != png_sizeof(jmp_buf)) + /* From libpng 1.6.0 the app gets one chance to set a 'jmpbuf_size' value + * and it must not change after that. Libpng doesn't care how big the + * buffer is, just that it doesn't change. + * + * If the buffer size is no *larger* than the size of jmp_buf when libpng is + * compiled a built in jmp_buf is returned; this preserves the pre-1.6.0 + * semantics that this call will not fail. If the size is larger, however, + * the buffer is allocated and this may fail, causing the function to return + * NULL. + */ + if (png_ptr == NULL) return NULL; + if (png_ptr->jmp_buf_ptr == NULL) + { + png_ptr->jmp_buf_size = 0; /* not allocated */ + + if (jmp_buf_size <= sizeof png_ptr->jmp_buf_local) + png_ptr->jmp_buf_ptr = &png_ptr->jmp_buf_local; + + else + { + png_ptr->jmp_buf_ptr = png_voidcast(jmp_buf *, + png_malloc_warn(png_ptr, jmp_buf_size)); + + if (png_ptr->jmp_buf_ptr == NULL) + return NULL; /* new NULL return on OOM */ + + png_ptr->jmp_buf_size = jmp_buf_size; + } + } + + else /* Already allocated: check the size */ + { + size_t size = png_ptr->jmp_buf_size; + + if (size == 0) + { + size = sizeof png_ptr->jmp_buf_local; + if (png_ptr->jmp_buf_ptr != &png_ptr->jmp_buf_local) + { + /* This is an internal error in libpng: somehow we have been left + * with a stack allocated jmp_buf when the application regained + * control. It's always possible to fix this up, but for the moment + * this is a png_error because that makes it easy to detect. + */ + png_error(png_ptr, "Libpng jmp_buf still allocated"); + /* png_ptr->jmp_buf_ptr = &png_ptr->jmp_buf_local; */ + } + } + + if (size != jmp_buf_size) + { + png_warning(png_ptr, "Application jmp_buf size changed"); + return NULL; /* caller will probably crash: no choice here */ + } + } + + /* Finally fill in the function, now we have a satisfactory buffer. It is + * valid to change the function on every call. + */ png_ptr->longjmp_fn = longjmp_fn; - return &png_ptr->longjmp_buffer; + return png_ptr->jmp_buf_ptr; +} + +void /* PRIVATE */ +png_free_jmpbuf(png_structrp png_ptr) +{ + if (png_ptr != NULL) + { + jmp_buf *jb = png_ptr->jmp_buf_ptr; + + /* A size of 0 is used to indicate a local, stack, allocation of the + * pointer; used here and in png.c + */ + if (jb != NULL && png_ptr->jmp_buf_size > 0) + { + + /* This stuff is so that a failure to free the error control structure + * does not leave libpng in a state with no valid error handling: the + * free always succeeds, if there is an error it gets ignored. + */ + if (jb != &png_ptr->jmp_buf_local) + { + /* Make an internal, libpng, jmp_buf to return here */ + jmp_buf free_jmp_buf; + + if (!setjmp(free_jmp_buf)) + { + png_ptr->jmp_buf_ptr = &free_jmp_buf; /* come back here */ + png_ptr->jmp_buf_size = 0; /* stack allocation */ + png_ptr->longjmp_fn = longjmp; + png_free(png_ptr, jb); /* Return to setjmp on error */ + } + } + } + + /* *Always* cancel everything out: */ + png_ptr->jmp_buf_size = 0; + png_ptr->jmp_buf_ptr = NULL; + png_ptr->longjmp_fn = 0; + } } #endif /* This is the default error handling function. Note that replacements for @@ -514,9 +648,9 @@ * function is used by default, or if the program supplies NULL for the * error function pointer in png_set_error_fn(). */ static PNG_FUNCTION(void /* PRIVATE */, -png_default_error,(png_structp png_ptr, png_const_charp error_message), +png_default_error,(png_const_structrp png_ptr, png_const_charp error_message), PNG_NORETURN) { #ifdef PNG_CONSOLE_IO_SUPPORTED #ifdef PNG_ERROR_NUMBERS_SUPPORTED @@ -561,25 +695,15 @@ png_longjmp(png_ptr, 1); } PNG_FUNCTION(void,PNGAPI -png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN) +png_longjmp,(png_const_structrp png_ptr, int val),PNG_NORETURN) { #ifdef PNG_SETJMP_SUPPORTED - if (png_ptr && png_ptr->longjmp_fn) - { -# ifdef USE_FAR_KEYWORD - { - jmp_buf tmp_jmpbuf; - png_memcpy(tmp_jmpbuf, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); - png_ptr->longjmp_fn(tmp_jmpbuf, val); - } - -# else - png_ptr->longjmp_fn(png_ptr->longjmp_buffer, val); -# endif - } + if (png_ptr && png_ptr->longjmp_fn && png_ptr->jmp_buf_ptr) + png_ptr->longjmp_fn(*png_ptr->jmp_buf_ptr, val); #endif + /* Here if not setjmp support or if png_ptr is null. */ PNG_ABORT(); } @@ -589,9 +713,9 @@ * here if you don't want them to. In the default configuration, png_ptr is * not used, but it is passed in case it may be useful. */ static void /* PRIVATE */ -png_default_warning(png_structp png_ptr, png_const_charp warning_message) +png_default_warning(png_const_structrp png_ptr, png_const_charp warning_message) { #ifdef PNG_CONSOLE_IO_SUPPORTED # ifdef PNG_ERROR_NUMBERS_SUPPORTED if (*warning_message == PNG_LITERAL_SHARP) @@ -636,12 +760,12 @@ /* This function is called when the application wants to use another method * of handling errors and warnings. Note that the error function MUST NOT * return to the calling routine or serious problems will occur. The return - * method used in the default routine calls longjmp(png_ptr->longjmp_buffer, 1) + * method used in the default routine calls longjmp(png_ptr->jmp_buf_ptr, 1) */ void PNGAPI -png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, +png_set_error_fn(png_structrp png_ptr, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn) { if (png_ptr == NULL) return; @@ -660,9 +784,9 @@ * functions. The application should free any memory associated with this * pointer before png_write_destroy and png_read_destroy are called. */ png_voidp PNGAPI -png_get_error_ptr(png_const_structp png_ptr) +png_get_error_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) return NULL; @@ -671,9 +795,9 @@ #ifdef PNG_ERROR_NUMBERS_SUPPORTED void PNGAPI -png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode) +png_set_strip_error_numbers(png_structrp png_ptr, png_uint_32 strip_mode) { if (png_ptr != NULL) { png_ptr->flags &= @@ -681,5 +805,90 @@ PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode); } } #endif + +#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ + defined PNG_SIMPLIFIED_WRITE_SUPPORTED + /* Currently the above both depend on SETJMP_SUPPORTED, however it would be + * possible to implement without setjmp support just so long as there is some + * way to handle the error return here: + */ +PNG_FUNCTION(void /* PRIVATE */, +png_safe_error,(png_structp png_nonconst_ptr, png_const_charp error_message), + PNG_NORETURN) +{ + const png_const_structrp png_ptr = png_nonconst_ptr; + png_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr); + + /* An error is always logged here, overwriting anything (typically a warning) + * that is already there: + */ + if (image != NULL) + { + png_safecat(image->message, sizeof image->message, 0, error_message); + image->warning_or_error |= PNG_IMAGE_ERROR; + + /* Retrieve the jmp_buf from within the png_control, making this work for + * C++ compilation too is pretty tricky: C++ wants a pointer to the first + * element of a jmp_buf, but C doesn't tell us the type of that. + */ + if (image->opaque != NULL && image->opaque->error_buf != NULL) + longjmp(png_control_jmp_buf(image->opaque), 1); + + /* Missing longjmp buffer, the following is to help debugging: */ + { + size_t pos = png_safecat(image->message, sizeof image->message, 0, + "bad longjmp: "); + png_safecat(image->message, sizeof image->message, pos, error_message); + } + } + + /* Here on an internal programming error. */ + abort(); +} + +#ifdef PNG_WARNINGS_SUPPORTED +void /* PRIVATE */ +png_safe_warning(png_structp png_nonconst_ptr, png_const_charp warning_message) +{ + const png_const_structrp png_ptr = png_nonconst_ptr; + png_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr); + + /* A warning is only logged if there is no prior warning or error. */ + if (image->warning_or_error == 0) + { + png_safecat(image->message, sizeof image->message, 0, warning_message); + image->warning_or_error |= PNG_IMAGE_WARNING; + } +} +#endif + +int /* PRIVATE */ +png_safe_execute(png_imagep imageIn, int (*function)(png_voidp), png_voidp arg) +{ + volatile png_imagep image = imageIn; + volatile int result; + volatile png_voidp saved_error_buf; + jmp_buf safe_jmpbuf; + + /* Safely execute function(arg) with png_error returning to this function. */ + saved_error_buf = image->opaque->error_buf; + result = setjmp(safe_jmpbuf) == 0; + + if (result) + { + + image->opaque->error_buf = safe_jmpbuf; + result = function(arg); + } + + image->opaque->error_buf = saved_error_buf; + + /* And do the cleanup prior to any failure return. */ + if (!result) + png_image_free(image); + + return result; +} +#endif /* SIMPLIFIED READ/WRITE */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff -ru4NwbB libpng-1.5.10/pngget.c libpng-1.6.0beta22/pngget.c --- libpng-1.5.10/pngget.c 2012-03-29 00:06:54.551776978 -0500 +++ libpng-1.6.0beta22/pngget.c 2012-05-23 12:30:56.117063562 -0500 @@ -1,9 +1,9 @@ /* pngget.c - retrieval of values from info struct * - * Last changed in libpng 1.5.7 [December 15, 2011] - * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * * This code is released under the libpng license. @@ -16,9 +16,9 @@ #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) png_uint_32 PNGAPI -png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_valid(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 flag) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->valid & flag); @@ -26,9 +26,9 @@ return(0); } png_size_t PNGAPI -png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_rowbytes(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->rowbytes); @@ -36,9 +36,9 @@ } #ifdef PNG_INFO_IMAGE_SUPPORTED png_bytepp PNGAPI -png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_rows(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->row_pointers); @@ -48,72 +48,72 @@ #ifdef PNG_EASY_ACCESS_SUPPORTED /* Easy access to info, added in libpng-0.99 */ png_uint_32 PNGAPI -png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_image_width(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->width; return (0); } png_uint_32 PNGAPI -png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_image_height(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->height; return (0); } png_byte PNGAPI -png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_bit_depth(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->bit_depth; return (0); } png_byte PNGAPI -png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_color_type(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->color_type; return (0); } png_byte PNGAPI -png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_filter_type(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->filter_type; return (0); } png_byte PNGAPI -png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_interlace_type(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->interlace_type; return (0); } png_byte PNGAPI -png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_compression_type(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->compression_type; return (0); } png_uint_32 PNGAPI -png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_pHYs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { @@ -128,9 +128,9 @@ return (0); } png_uint_32 PNGAPI -png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_pHYs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { @@ -145,9 +145,9 @@ return (0); } png_uint_32 PNGAPI -png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_pHYs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { @@ -163,9 +163,9 @@ } #ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_pixel_aspect_ratio(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_READ_pHYs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { @@ -182,10 +182,10 @@ #endif #ifdef PNG_FIXED_POINT_SUPPORTED png_fixed_point PNGAPI -png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr, - png_const_infop info_ptr) +png_get_pixel_aspect_ratio_fixed(png_const_structrp png_ptr, + png_const_inforp info_ptr) { #ifdef PNG_READ_pHYs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs) && info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0 @@ -209,9 +209,9 @@ } #endif png_int_32 PNGAPI -png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_oFFs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { @@ -225,9 +225,9 @@ return (0); } png_int_32 PNGAPI -png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_oFFs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { @@ -241,9 +241,9 @@ return (0); } png_int_32 PNGAPI -png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_oFFs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { @@ -257,9 +257,9 @@ return (0); } png_int_32 PNGAPI -png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_oFFs_SUPPORTED if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { @@ -306,28 +306,28 @@ #endif } png_uint_32 PNGAPI -png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) { return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr)); } png_uint_32 PNGAPI -png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) { return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr)); } png_uint_32 PNGAPI -png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) { return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr)); } #ifdef PNG_FIXED_POINT_SUPPORTED static png_fixed_point -png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns) +png_fixed_inches_from_microns(png_const_structrp png_ptr, png_int_32 microns) { /* Convert from metres * 1,000,000 to inches * 100,000, meters to * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127. * Notice that this can overflow - a warning is output and 0 is @@ -336,29 +336,29 @@ return png_muldiv_warn(png_ptr, microns, 500, 127); } png_fixed_point PNGAPI -png_get_x_offset_inches_fixed(png_structp png_ptr, - png_const_infop info_ptr) +png_get_x_offset_inches_fixed(png_const_structrp png_ptr, + png_const_inforp info_ptr) { return png_fixed_inches_from_microns(png_ptr, png_get_x_offset_microns(png_ptr, info_ptr)); } #endif #ifdef PNG_FIXED_POINT_SUPPORTED png_fixed_point PNGAPI -png_get_y_offset_inches_fixed(png_structp png_ptr, - png_const_infop info_ptr) +png_get_y_offset_inches_fixed(png_const_structrp png_ptr, + png_const_inforp info_ptr) { return png_fixed_inches_from_microns(png_ptr, png_get_y_offset_microns(png_ptr, info_ptr)); } #endif #ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_offset_inches(png_const_structrp png_ptr, png_const_inforp info_ptr) { /* To avoid the overflow do the conversion directly in floating * point. */ @@ -367,9 +367,9 @@ #endif #ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_offset_inches(png_const_structrp png_ptr, png_const_inforp info_ptr) { /* To avoid the overflow do the conversion directly in floating * point. */ @@ -378,9 +378,9 @@ #endif #ifdef PNG_pHYs_SUPPORTED png_uint_32 PNGAPI -png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) { png_uint_32 retval = 0; @@ -422,18 +422,18 @@ #endif /* PNG_EASY_ACCESS_SUPPORTED */ png_byte PNGAPI -png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_channels(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->channels); return (0); } png_const_bytep PNGAPI -png_get_signature(png_const_structp png_ptr, png_infop info_ptr) +png_get_signature(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->signature); @@ -441,9 +441,9 @@ } #ifdef PNG_bKGD_SUPPORTED png_uint_32 PNGAPI -png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr, +png_get_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, png_color_16p *background) { if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) && background != NULL) @@ -462,125 +462,93 @@ /* The XYZ APIs were added in 1.5.5 to take advantage of the code added at the * same time to correct the rgb grayscale coefficient defaults obtained from the * cHRM chunk in 1.5.4 */ -png_uint_32 PNGFAPI -png_get_cHRM_XYZ_fixed(png_structp png_ptr, png_const_infop info_ptr, - png_fixed_point *int_red_X, png_fixed_point *int_red_Y, - png_fixed_point *int_red_Z, png_fixed_point *int_green_X, - png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, - png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, - png_fixed_point *int_blue_Z) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - { - png_xy xy; - png_XYZ XYZ; - - png_debug1(1, "in %s retrieval function", "cHRM_XYZ"); - - xy.whitex = info_ptr->x_white; - xy.whitey = info_ptr->y_white; - xy.redx = info_ptr->x_red; - xy.redy = info_ptr->y_red; - xy.greenx = info_ptr->x_green; - xy.greeny = info_ptr->y_green; - xy.bluex = info_ptr->x_blue; - xy.bluey = info_ptr->y_blue; - - /* The *_checked function handles error reporting, so just return 0 if - * there is a failure here. - */ - if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) - { - if (int_red_X != NULL) - *int_red_X = XYZ.redX; - if (int_red_Y != NULL) - *int_red_Y = XYZ.redY; - if (int_red_Z != NULL) - *int_red_Z = XYZ.redZ; - if (int_green_X != NULL) - *int_green_X = XYZ.greenX; - if (int_green_Y != NULL) - *int_green_Y = XYZ.greenY; - if (int_green_Z != NULL) - *int_green_Z = XYZ.greenZ; - if (int_blue_X != NULL) - *int_blue_X = XYZ.blueX; - if (int_blue_Y != NULL) - *int_blue_Y = XYZ.blueY; - if (int_blue_Z != NULL) - *int_blue_Z = XYZ.blueZ; - - return (PNG_INFO_cHRM); - } - } - - return (0); -} - # ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_cHRM(png_const_structrp png_ptr, png_const_inforp info_ptr, double *white_x, double *white_y, double *red_x, double *red_y, double *green_x, double *green_y, double *blue_x, double *blue_y) { - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + /* Quiet API change: this code used to only return the end points if a cHRM + * chunk was present, but the end points can also come from iCCP or sRGB + * chunks, so in 1.6.0 the png_get_ APIs return the end points regardless and + * the png_set_ APIs merely check that set end points are mutually + * consistent. + */ + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS)) { png_debug1(1, "in %s retrieval function", "cHRM"); if (white_x != NULL) - *white_x = png_float(png_ptr, info_ptr->x_white, "cHRM white X"); + *white_x = png_float(png_ptr, + info_ptr->colorspace.end_points_xy.whitex, "cHRM white X"); if (white_y != NULL) - *white_y = png_float(png_ptr, info_ptr->y_white, "cHRM white Y"); + *white_y = png_float(png_ptr, + info_ptr->colorspace.end_points_xy.whitey, "cHRM white Y"); if (red_x != NULL) - *red_x = png_float(png_ptr, info_ptr->x_red, "cHRM red X"); + *red_x = png_float(png_ptr, info_ptr->colorspace.end_points_xy.redx, + "cHRM red X"); if (red_y != NULL) - *red_y = png_float(png_ptr, info_ptr->y_red, "cHRM red Y"); + *red_y = png_float(png_ptr, info_ptr->colorspace.end_points_xy.redy, + "cHRM red Y"); if (green_x != NULL) - *green_x = png_float(png_ptr, info_ptr->x_green, "cHRM green X"); + *green_x = png_float(png_ptr, + info_ptr->colorspace.end_points_xy.greenx, "cHRM green X"); if (green_y != NULL) - *green_y = png_float(png_ptr, info_ptr->y_green, "cHRM green Y"); + *green_y = png_float(png_ptr, + info_ptr->colorspace.end_points_xy.greeny, "cHRM green Y"); if (blue_x != NULL) - *blue_x = png_float(png_ptr, info_ptr->x_blue, "cHRM blue X"); + *blue_x = png_float(png_ptr, info_ptr->colorspace.end_points_xy.bluex, + "cHRM blue X"); if (blue_y != NULL) - *blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y"); + *blue_y = png_float(png_ptr, info_ptr->colorspace.end_points_xy.bluey, + "cHRM blue Y"); return (PNG_INFO_cHRM); } return (0); } png_uint_32 PNGAPI -png_get_cHRM_XYZ(png_structp png_ptr, png_const_infop info_ptr, +png_get_cHRM_XYZ(png_const_structrp png_ptr, png_const_inforp info_ptr, double *red_X, double *red_Y, double *red_Z, double *green_X, double *green_Y, double *green_Z, double *blue_X, double *blue_Y, double *blue_Z) { - png_XYZ XYZ; - - if (png_get_cHRM_XYZ_fixed(png_ptr, info_ptr, - &XYZ.redX, &XYZ.redY, &XYZ.redZ, &XYZ.greenX, &XYZ.greenY, &XYZ.greenZ, - &XYZ.blueX, &XYZ.blueY, &XYZ.blueZ) & PNG_INFO_cHRM) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS)) { + png_debug1(1, "in %s retrieval function", "cHRM_XYZ(float)"); + if (red_X != NULL) - *red_X = png_float(png_ptr, XYZ.redX, "cHRM red X"); + *red_X = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.redX, + "cHRM red X"); if (red_Y != NULL) - *red_Y = png_float(png_ptr, XYZ.redY, "cHRM red Y"); + *red_Y = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.redY, + "cHRM red Y"); if (red_Z != NULL) - *red_Z = png_float(png_ptr, XYZ.redZ, "cHRM red Z"); + *red_Z = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.redZ, + "cHRM red Z"); if (green_X != NULL) - *green_X = png_float(png_ptr, XYZ.greenX, "cHRM green X"); + *green_X = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.greenX, "cHRM green X"); if (green_Y != NULL) - *green_Y = png_float(png_ptr, XYZ.greenY, "cHRM green Y"); + *green_Y = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.greenY, "cHRM green Y"); if (green_Z != NULL) - *green_Z = png_float(png_ptr, XYZ.greenZ, "cHRM green Z"); + *green_Z = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.greenZ, "cHRM green Z"); if (blue_X != NULL) - *blue_X = png_float(png_ptr, XYZ.blueX, "cHRM blue X"); + *blue_X = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.blueX, + "cHRM blue X"); if (blue_Y != NULL) - *blue_Y = png_float(png_ptr, XYZ.blueY, "cHRM blue Y"); + *blue_Y = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.blueY, + "cHRM blue Y"); if (blue_Z != NULL) - *blue_Z = png_float(png_ptr, XYZ.blueZ, "cHRM blue Z"); + *blue_Z = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.blueZ, + "cHRM blue Z"); return (PNG_INFO_cHRM); } return (0); @@ -588,33 +556,71 @@ # endif # ifdef PNG_FIXED_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, + png_fixed_point *int_red_X, png_fixed_point *int_red_Y, + png_fixed_point *int_red_Z, png_fixed_point *int_green_X, + png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, + png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, + png_fixed_point *int_blue_Z) +{ + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS)) + { + png_debug1(1, "in %s retrieval function", "cHRM_XYZ"); + + if (int_red_X != NULL) + *int_red_X = info_ptr->colorspace.end_points_XYZ.redX; + if (int_red_Y != NULL) + *int_red_Y = info_ptr->colorspace.end_points_XYZ.redY; + if (int_red_Z != NULL) + *int_red_Z = info_ptr->colorspace.end_points_XYZ.redZ; + if (int_green_X != NULL) + *int_green_X = info_ptr->colorspace.end_points_XYZ.greenX; + if (int_green_Y != NULL) + *int_green_Y = info_ptr->colorspace.end_points_XYZ.greenY; + if (int_green_Z != NULL) + *int_green_Z = info_ptr->colorspace.end_points_XYZ.greenZ; + if (int_blue_X != NULL) + *int_blue_X = info_ptr->colorspace.end_points_XYZ.blueX; + if (int_blue_Y != NULL) + *int_blue_Y = info_ptr->colorspace.end_points_XYZ.blueY; + if (int_blue_Z != NULL) + *int_blue_Z = info_ptr->colorspace.end_points_XYZ.blueZ; + return (PNG_INFO_cHRM); + } + + return (0); +} + +png_uint_32 PNGAPI +png_get_cHRM_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, png_fixed_point *blue_x, png_fixed_point *blue_y) { png_debug1(1, "in %s retrieval function", "cHRM"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS)) { if (white_x != NULL) - *white_x = info_ptr->x_white; + *white_x = info_ptr->colorspace.end_points_xy.whitex; if (white_y != NULL) - *white_y = info_ptr->y_white; + *white_y = info_ptr->colorspace.end_points_xy.whitey; if (red_x != NULL) - *red_x = info_ptr->x_red; + *red_x = info_ptr->colorspace.end_points_xy.redx; if (red_y != NULL) - *red_y = info_ptr->y_red; + *red_y = info_ptr->colorspace.end_points_xy.redy; if (green_x != NULL) - *green_x = info_ptr->x_green; + *green_x = info_ptr->colorspace.end_points_xy.greenx; if (green_y != NULL) - *green_y = info_ptr->y_green; + *green_y = info_ptr->colorspace.end_points_xy.greeny; if (blue_x != NULL) - *blue_x = info_ptr->x_blue; + *blue_x = info_ptr->colorspace.end_points_xy.bluex; if (blue_y != NULL) - *blue_y = info_ptr->y_blue; + *blue_y = info_ptr->colorspace.end_points_xy.bluey; return (PNG_INFO_cHRM); } return (0); @@ -622,51 +628,59 @@ # endif #endif #ifdef PNG_gAMA_SUPPORTED -png_uint_32 PNGFAPI -png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr, +# ifdef PNG_FIXED_POINT_SUPPORTED +png_uint_32 PNGAPI +png_get_gAMA_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, png_fixed_point *file_gamma) { png_debug1(1, "in %s retrieval function", "gAMA"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) - && file_gamma != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) && + file_gamma != NULL) { - *file_gamma = info_ptr->gamma; + *file_gamma = info_ptr->colorspace.gamma; return (PNG_INFO_gAMA); } return (0); } +# endif + # ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_gAMA(png_const_structrp png_ptr, png_const_inforp info_ptr, double *file_gamma) { - png_fixed_point igamma; - png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma); - - if (ok) - *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA"); + png_debug1(1, "in %s retrieval function", "gAMA(float)"); - return ok; + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) && + file_gamma != NULL) + { + *file_gamma = png_float(png_ptr, info_ptr->colorspace.gamma, + "png_get_gAMA"); + return (PNG_INFO_gAMA); } + return (0); +} # endif #endif #ifdef PNG_sRGB_SUPPORTED png_uint_32 PNGAPI -png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_sRGB(png_const_structrp png_ptr, png_const_inforp info_ptr, int *file_srgb_intent) { png_debug1(1, "in %s retrieval function", "sRGB"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) && file_srgb_intent != NULL) { - *file_srgb_intent = (int)info_ptr->srgb_intent; + *file_srgb_intent = info_ptr->colorspace.rendering_intent; return (PNG_INFO_sRGB); } return (0); @@ -674,9 +688,9 @@ #endif #ifdef PNG_iCCP_SUPPORTED png_uint_32 PNGAPI -png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_iCCP(png_const_structrp png_ptr, png_const_inforp info_ptr, png_charpp name, int *compression_type, png_bytepp profile, png_uint_32 *proflen) { png_debug1(1, "in %s retrieval function", "iCCP"); @@ -686,13 +700,13 @@ proflen != NULL) { *name = info_ptr->iccp_name; *profile = info_ptr->iccp_profile; - /* Compression_type is a dummy so the API won't have to change - * if we introduce multiple compression types later. + *proflen = png_get_uint_32(info_ptr->iccp_profile); + /* This is somewhat irrelevant since the profile data returned has + * actually been uncompressed. */ - *proflen = info_ptr->iccp_proflen; - *compression_type = info_ptr->iccp_compression; + *compression_type = PNG_COMPRESSION_TYPE_BASE; return (PNG_INFO_iCCP); } return (0); @@ -700,9 +714,9 @@ #endif #ifdef PNG_sPLT_SUPPORTED png_uint_32 PNGAPI -png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_sPLT(png_const_structrp png_ptr, png_const_inforp info_ptr, png_sPLT_tpp spalettes) { if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) { @@ -715,9 +729,9 @@ #endif #ifdef PNG_hIST_SUPPORTED png_uint_32 PNGAPI -png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_hIST(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_16p *hist) { png_debug1(1, "in %s retrieval function", "hIST"); @@ -732,13 +746,12 @@ } #endif png_uint_32 PNGAPI -png_get_IHDR(png_structp png_ptr, png_infop info_ptr, +png_get_IHDR(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, int *interlace_type, int *compression_type, int *filter_type) - { png_debug1(1, "in %s retrieval function", "IHDR"); if (png_ptr == NULL || info_ptr == NULL || width == NULL || @@ -772,9 +785,9 @@ } #ifdef PNG_oFFs_SUPPORTED png_uint_32 PNGAPI -png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_oFFs(png_const_structrp png_ptr, png_const_inforp info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) { png_debug1(1, "in %s retrieval function", "oFFs"); @@ -792,9 +805,9 @@ #endif #ifdef PNG_pCAL_SUPPORTED png_uint_32 PNGAPI -png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_pCAL(png_const_structrp png_ptr, png_const_inforp info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, png_charp *units, png_charpp *params) { png_debug1(1, "in %s retrieval function", "pCAL"); @@ -818,18 +831,22 @@ #endif #ifdef PNG_sCAL_SUPPORTED # ifdef PNG_FIXED_POINT_SUPPORTED -# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +# if (defined PNG_FLOATING_ARITHMETIC_SUPPORTED) || \ + (defined PNG_FLOATING_POINT_SUPPORTED) png_uint_32 PNGAPI -png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr, +png_get_sCAL_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, png_fixed_point *width, png_fixed_point *height) { if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) { *unit = info_ptr->scal_unit; - /*TODO: make this work without FP support */ + /*TODO: make this work without FP support; the API is currently eliminated + * if neither floating point APIs nor internal floating point arithmetic + * are enabled. + */ *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width"); *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height), "sCAL height"); return (PNG_INFO_sCAL); @@ -840,9 +857,9 @@ # endif /* FLOATING_ARITHMETIC */ # endif /* FIXED_POINT */ # ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_sCAL(png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, double *width, double *height) { if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) @@ -856,9 +873,9 @@ return(0); } # endif /* FLOATING POINT */ png_uint_32 PNGAPI -png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_sCAL_s(png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, png_charpp width, png_charpp height) { if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) @@ -874,9 +891,9 @@ #endif /* sCAL */ #ifdef PNG_pHYs_SUPPORTED png_uint_32 PNGAPI -png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_pHYs(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) { png_uint_32 retval = 0; @@ -908,9 +925,9 @@ } #endif /* pHYs */ png_uint_32 PNGAPI -png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_PLTE(png_const_structrp png_ptr, png_const_inforp info_ptr, png_colorp *palette, int *num_palette) { png_debug1(1, "in %s retrieval function", "PLTE"); @@ -927,9 +944,9 @@ } #ifdef PNG_sBIT_SUPPORTED png_uint_32 PNGAPI -png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr, +png_get_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, png_color_8p *sig_bit) { png_debug1(1, "in %s retrieval function", "sBIT"); @@ -945,9 +962,9 @@ #endif #ifdef PNG_TEXT_SUPPORTED png_uint_32 PNGAPI -png_get_text(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_text(png_const_structrp png_ptr, png_const_inforp info_ptr, png_textp *text_ptr, int *num_text) { if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) { @@ -971,9 +988,10 @@ #endif #ifdef PNG_tIME_SUPPORTED png_uint_32 PNGAPI -png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time) +png_get_tIME(png_const_structrp png_ptr, png_inforp info_ptr, + png_timep *mod_time) { png_debug1(1, "in %s retrieval function", "tIME"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME) @@ -988,9 +1006,9 @@ #endif #ifdef PNG_tRNS_SUPPORTED png_uint_32 PNGAPI -png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr, +png_get_tRNS(png_const_structrp png_ptr, png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color) { png_uint_32 retval = 0; if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) @@ -1033,9 +1051,9 @@ #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED int PNGAPI -png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_unknown_chunks(png_const_structrp png_ptr, png_const_inforp info_ptr, png_unknown_chunkpp unknowns) { if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) { @@ -1048,77 +1066,87 @@ #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED png_byte PNGAPI -png_get_rgb_to_gray_status (png_const_structp png_ptr) +png_get_rgb_to_gray_status (png_const_structrp png_ptr) { return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0); } #endif #ifdef PNG_USER_CHUNKS_SUPPORTED png_voidp PNGAPI -png_get_user_chunk_ptr(png_const_structp png_ptr) +png_get_user_chunk_ptr(png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_chunk_ptr : NULL); } #endif png_size_t PNGAPI -png_get_compression_buffer_size(png_const_structp png_ptr) +png_get_compression_buffer_size(png_const_structrp png_ptr) +{ + if (png_ptr == NULL) + return 0; + +# ifdef PNG_WRITE_SUPPORTED + if (png_ptr->mode & PNG_IS_READ_STRUCT) +# endif { - return (png_ptr ? png_ptr->zbuf_size : 0); +# ifdef PNG_SEQUENTIAL_READ_SUPPORTED + return png_ptr->IDAT_read_size; +# else + return PNG_IDAT_READ_SIZE; +# endif + } + +# ifdef PNG_WRITE_SUPPORTED + else + return png_ptr->zbuffer_size; +# endif } #ifdef PNG_SET_USER_LIMITS_SUPPORTED /* These functions were added to libpng 1.2.6 and were enabled * by default in libpng-1.4.0 */ png_uint_32 PNGAPI -png_get_user_width_max (png_const_structp png_ptr) +png_get_user_width_max (png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_width_max : 0); } png_uint_32 PNGAPI -png_get_user_height_max (png_const_structp png_ptr) +png_get_user_height_max (png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_height_max : 0); } /* This function was added to libpng 1.4.0 */ png_uint_32 PNGAPI -png_get_chunk_cache_max (png_const_structp png_ptr) +png_get_chunk_cache_max (png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_chunk_cache_max : 0); } /* This function was added to libpng 1.4.1 */ png_alloc_size_t PNGAPI -png_get_chunk_malloc_max (png_const_structp png_ptr) +png_get_chunk_malloc_max (png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_chunk_malloc_max : 0); } #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ /* These functions were added to libpng 1.4.0 */ #ifdef PNG_IO_STATE_SUPPORTED png_uint_32 PNGAPI -png_get_io_state (png_structp png_ptr) +png_get_io_state (png_const_structrp png_ptr) { return png_ptr->io_state; } png_uint_32 PNGAPI -png_get_io_chunk_type (png_const_structp png_ptr) +png_get_io_chunk_type (png_const_structrp png_ptr) { return png_ptr->chunk_name; } - -png_const_bytep PNGAPI -png_get_io_chunk_name (png_structp png_ptr) -{ - PNG_CSTRING_FROM_CHUNK(png_ptr->io_chunk_string, png_ptr->chunk_name); - return png_ptr->io_chunk_string; -} #endif /* ?PNG_IO_STATE_SUPPORTED */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff -ru4NwbB libpng-1.5.10/pnginfo.h libpng-1.6.0beta22/pnginfo.h --- libpng-1.5.10/pnginfo.h 2012-03-29 00:06:54.509468409 -0500 +++ libpng-1.6.0beta22/pnginfo.h 2012-05-23 12:30:56.070681416 -0500 @@ -69,32 +69,41 @@ png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */ png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */ png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ +#ifdef PNG_READ_SUPPORTED /* The following is informational only on read, and not used on writes. */ png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */ png_byte pixel_depth; /* number of bits per pixel */ png_byte spare_byte; /* to align the data, and for future use */ png_byte signature[8]; /* magic bytes read by libpng from start of file */ +#endif /* The rest of the data is optional. If you are reading, check the * valid field to see if the information in these are valid. If you * are writing, set the valid field to those chunks you want written, * and initialize the appropriate fields below. */ -#if defined(PNG_gAMA_SUPPORTED) - /* The gAMA chunk describes the gamma characteristics of the system - * on which the image was created, normally in the range [1.0, 2.5]. - * Data is valid if (valid & PNG_INFO_gAMA) is non-zero. - */ - png_fixed_point gamma; +#if defined PNG_COLORSPACE_SUPPORTED || defined PNG_GAMMA_SUPPORTED + /* png_colorspace only contains 'flags' if neither GAMMA or COLORSPACE are + * defined. When COLORSPACE is switched on all the colorspace-defining + * chunks should be enabled, when GAMMA is switched on all the gamma-defining + * chunks should be enabled. If this is not done it becomes possible to read + * inconsistent PNG files and assign a probably incorrect interpretation to + * the information. (In other words, by carefully choosing which chunks to + * recognize the system configuration can select an interpretation for PNG + * files containing ambiguous data and this will result in inconsistent + * behavior between different libpng builds!) + */ + png_colorspace colorspace; #endif -#ifdef PNG_sRGB_SUPPORTED - /* GR-P, 0.96a */ - /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */ - png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */ +#ifdef PNG_iCCP_SUPPORTED + /* iCCP chunk data. */ + png_charp iccp_name; /* profile name */ + png_bytep iccp_profile; /* International Color Consortium profile data */ + png_uint_32 iccp_proflen; /* ICC profile data length */ #endif #ifdef PNG_TEXT_SUPPORTED /* The tEXt, and zTXt chunks contain human-readable textual data in @@ -182,25 +191,8 @@ */ png_uint_16p hist; #endif -#ifdef PNG_cHRM_SUPPORTED - /* The cHRM chunk describes the CIE color characteristics of the monitor - * on which the PNG was created. This data allows the viewer to do gamut - * mapping of the input image to ensure that the viewer sees the same - * colors in the image as the creator. Values are in the range - * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero. - */ - png_fixed_point x_white; - png_fixed_point y_white; - png_fixed_point x_red; - png_fixed_point y_red; - png_fixed_point x_green; - png_fixed_point y_green; - png_fixed_point x_blue; - png_fixed_point y_blue; -#endif - #ifdef PNG_pCAL_SUPPORTED /* The pCAL chunk describes a transformation between the stored pixel * values and original physical data values used to create the image. * The integer range [0, 2^bit_depth - 1] maps to the floating-point @@ -230,16 +222,8 @@ png_unknown_chunkp unknown_chunks; int unknown_chunks_num; #endif -#ifdef PNG_iCCP_SUPPORTED - /* iCCP chunk data. */ - png_charp iccp_name; /* profile name */ - png_bytep iccp_profile; /* International Color Consortium profile data */ - png_uint_32 iccp_proflen; /* ICC profile data length */ - png_byte iccp_compression; /* Always zero */ -#endif - #ifdef PNG_sPLT_SUPPORTED /* Data on sPLT chunks (there may be more than one). */ png_sPLT_tp splt_palettes; png_uint_32 splt_palettes_num; diff -ru4NwbB libpng-1.5.10/pngmem.c libpng-1.6.0beta22/pngmem.c --- libpng-1.5.10/pngmem.c 2012-03-29 00:06:54.558678461 -0500 +++ libpng-1.6.0beta22/pngmem.c 2012-05-23 12:30:56.122777366 -0500 @@ -1,9 +1,9 @@ /* pngmem.c - stub functions for memory allocation * - * Last changed in libpng 1.5.7 [December 15, 2011] - * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * * This code is released under the libpng license. @@ -19,629 +19,177 @@ #include "pngpriv.h" #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) - -/* Borland DOS special memory handler */ -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* If you change this, be sure to change the one in png.h also */ - -/* Allocate memory for a png_struct. The malloc and memset can be replaced - by a single call to calloc() if this is thought to improve performance. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct,(int type),PNG_ALLOCATED) -{ -# ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL, NULL)); -} - -/* Alternate version of png_create_struct, for use with user-defined malloc. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), - PNG_ALLOCATED) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = png_sizeof(png_info); - - else if (type == PNG_STRUCT_PNG) - size = png_sizeof(png_struct); - - else - return (png_get_copyright(NULL)); - -# ifdef PNG_USER_MEM_SUPPORTED - if (malloc_fn != NULL) - { - png_struct dummy_struct; - memset(&dummy_struct, 0, sizeof dummy_struct); - dummy_struct.mem_ptr=mem_ptr; - struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size); - } - - else -# endif /* PNG_USER_MEM_SUPPORTED */ - struct_ptr = (png_voidp)farmalloc(size); - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); -} - -/* Free memory allocated by a png_create_struct() call */ +/* Free a png_struct */ void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) +png_destroy_png_struct(png_structrp png_ptr) { -# ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, NULL, NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, - png_voidp mem_ptr) + if (png_ptr != NULL) { + /* png_free might call png_error and may certainly call + * png_get_mem_ptr, so fake a temporary png_struct to support this. + */ + png_struct dummy_struct = *png_ptr; + memset(png_ptr, 0, sizeof *png_ptr); + png_free(&dummy_struct, png_ptr); + +# ifdef PNG_SETJMP_SUPPORTED + /* We may have a jmp_buf left to deallocate. */ + png_free_jmpbuf(&dummy_struct); # endif - if (struct_ptr != NULL) - { -# ifdef PNG_USER_MEM_SUPPORTED - if (free_fn != NULL) - { - png_struct dummy_struct; - memset(&dummy_struct, 0, sizeof dummy_struct); - dummy_struct.mem_ptr=mem_ptr; - (*(free_fn))(&dummy_struct, struct_ptr); - return; - } - -# endif /* PNG_USER_MEM_SUPPORTED */ - farfree (struct_ptr); } } /* Allocate memory. For reasonable files, size should never exceed * 64K. However, zlib may allocate more then 64K if you don't tell * it not to. See zconf.h and png.h for more information. zlib does * need to allocate exactly 64K, so whatever you call here must * have the ability to do that. - * - * Borland seems to have a problem in DOS mode for exactly 64K. - * It gives you a segment with an offset of 8 (perhaps to store its - * memory stuff). zlib doesn't like this at all, so we have to - * detect and deal with it. This code should not be needed in - * Windows or OS/2 modes, and only in 16 bit mode. This code has - * been updated by Alexander Lehmann for version 0.89 to waste less - * memory. - * - * Note that we can't use png_size_t for the "size" declaration, - * since on some systems a png_size_t is a 16-bit quantity, and as a - * result, we would be truncating potentially larger memory requests - * (which should cause a fatal error) and introducing major problems. */ PNG_FUNCTION(png_voidp,PNGAPI -png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +png_calloc,(png_const_structrp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; - ret = (png_malloc(png_ptr, size)); + ret = png_malloc(png_ptr, size); if (ret != NULL) - png_memset(ret,0,(png_size_t)size); + png_memset(ret, 0, size); - return (ret); + return ret; } -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +/* png_malloc_base, an internal function added at libpng 1.6.0, does the work of + * allocating memory, taking into account limits and PNG_USER_MEM_SUPPORTED. + * Checking and error handling must happen outside this routine; it returns NULL + * if the allocation cannot be done (for any reason.) + */ +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED) { - png_voidp ret; - - if (png_ptr == NULL || size == 0) - return (NULL); - + /* Moved to png_malloc_base from png_malloc_default in 1.6.0; the DOS + * allocators have also been removed in 1.6.0, so any 16-bit system now has + * to implement a user memory handler. This checks to be sure it isn't + * called with big numbers. + */ # ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->malloc_fn != NULL) - ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); - - else - ret = (png_malloc_default(png_ptr, size)); - - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of memory"); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - { - png_warning(png_ptr, "Cannot Allocate > 64K"); - ret = NULL; - } - - else + PNG_UNUSED(png_ptr) # endif - - if (size != (size_t)size) - ret = NULL; - - else if (size == (png_uint_32)65536L) - { - if (png_ptr->offset_table == NULL) - { - /* Try to see if we need to do any of this fancy stuff */ - ret = farmalloc(size); - if (ret == NULL || ((png_size_t)ret & 0xffff)) - { - int num_blocks; - png_uint_32 total_size; - png_bytep table; - int i, mem_level, window_bits; - png_byte huge * hptr; - int window_bits - - if (ret != NULL) - { - farfree(ret); - ret = NULL; - } - - window_bits = - png_ptr->zlib_window_bits >= png_ptr->zlib_text_window_bits ? - png_ptr->zlib_window_bits : png_ptr->zlib_text_window_bits; - - if (window_bits > 14) - num_blocks = (int)(1 << (window_bits - 14)); - - else - num_blocks = 1; - - mem_level = - png_ptr->zlib_mem_level >= png_ptr->zlib_text_mem_level ? - png_ptr->zlib_mem_level : png_ptr->zlib_text_mem_level; - - if (mem_level >= 7) - num_blocks += (int)(1 << (mem_level - 7)); - - else - num_blocks++; - - total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; - - table = farmalloc(total_size); - - if (table == NULL) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */ - - else - png_warning(png_ptr, "Out Of Memory"); -# endif - return (NULL); - } - - if ((png_size_t)table & 0xfff0) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, - "Farmalloc didn't return normalized pointer"); - - else - png_warning(png_ptr, - "Farmalloc didn't return normalized pointer"); -# endif - return (NULL); - } - - png_ptr->offset_table = table; - png_ptr->offset_table_ptr = farmalloc(num_blocks * - png_sizeof(png_bytep)); - - if (png_ptr->offset_table_ptr == NULL) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */ - - else - png_warning(png_ptr, "Out Of memory"); + if (size > 0 && size <= ~(size_t)0 +# ifdef PNG_MAX_MALLOC_64K + && size <= 65536U # endif - return (NULL); - } - - hptr = (png_byte huge *)table; - if ((png_size_t)hptr & 0xf) + ) { - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ - } - - for (i = 0; i < num_blocks; i++) - { - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */ - } - - png_ptr->offset_table_number = num_blocks; - png_ptr->offset_table_count = 0; - png_ptr->offset_table_count_free = 0; - } - } - - if (png_ptr->offset_table_count >= png_ptr->offset_table_number) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); /* Note "O" and "M" */ +#ifdef PNG_USER_MEM_SUPPORTED + if (png_ptr != NULL && png_ptr->malloc_fn != NULL) + return png_ptr->malloc_fn(png_constcast(png_structrp,png_ptr), size); else - png_warning(png_ptr, "Out of Memory"); # endif - return (NULL); + return malloc((size_t)size); /* checked for truncation above */ } - ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; - } - - else - ret = farmalloc(size); - -# ifndef PNG_USER_MEM_SUPPORTED - if (ret == NULL) - { - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */ - else - png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */ - } -# endif - - return (ret); + return NULL; } -/* Free a pointer allocated by png_malloc(). In the default - * configuration, png_ptr is not used, but is passed in case it - * is needed. If ptr is NULL, return without taking any action. +/* Various functions that have different error handling are derived from this. + * png_malloc always exists, but if PNG_USER_MEM_SUPPORTED is defined a separate + * function png_malloc_default is also provided. */ -void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } - - else - png_free_default(png_ptr, ptr); -} - -void PNGAPI -png_free_default(png_structp png_ptr, png_voidp ptr) +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc,(png_const_structrp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || ptr == NULL) - return; + png_voidp ret; - if (png_ptr->offset_table != NULL) - { - int i; + if (png_ptr == NULL) + return NULL; - for (i = 0; i < png_ptr->offset_table_count; i++) - { - if (ptr == png_ptr->offset_table_ptr[i]) - { - ptr = NULL; - png_ptr->offset_table_count_free++; - break; - } - } - if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) - { - farfree(png_ptr->offset_table); - farfree(png_ptr->offset_table_ptr); - png_ptr->offset_table = NULL; - png_ptr->offset_table_ptr = NULL; - } - } + ret = png_malloc_base(png_ptr, size); - if (ptr != NULL) - farfree(ptr); -} - -#else /* Not the Borland DOS special memory handler */ + if (ret == NULL) + png_error(png_ptr, "Out of memory"); /* 'm' means png_malloc */ -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct,(int type),PNG_ALLOCATED) -{ -# ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL, NULL)); + return ret; } -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), - PNG_ALLOCATED) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = png_sizeof(png_info); - - else if (type == PNG_STRUCT_PNG) - size = png_sizeof(png_struct); - - else - return (NULL); - # ifdef PNG_USER_MEM_SUPPORTED - if (malloc_fn != NULL) +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc_default,(png_const_structrp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED PNG_DEPRECATED) { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - png_ptr->mem_ptr=mem_ptr; - struct_ptr = (*(malloc_fn))(png_ptr, size); - - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); - } -# endif /* PNG_USER_MEM_SUPPORTED */ - -# if defined(__TURBOC__) && !defined(__FLAT__) - struct_ptr = (png_voidp)farmalloc(size); -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - struct_ptr = (png_voidp)halloc(size, 1); -# else - struct_ptr = (png_voidp)malloc(size); -# endif -# endif - - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); + png_voidp ret; - return (struct_ptr); -} + if (png_ptr == NULL) + return NULL; + /* Passing 'NULL' here bypasses the application provided memory handler. */ + ret = png_malloc_base(NULL/*use malloc*/, size); -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) -{ -# ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, NULL, NULL); -} + if (ret == NULL) + png_error(png_ptr, "Out of Memory"); /* 'M' means png_malloc_default */ -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, - png_voidp mem_ptr) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - if (struct_ptr != NULL) - { -# ifdef PNG_USER_MEM_SUPPORTED - if (free_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - png_ptr->mem_ptr=mem_ptr; - (*(free_fn))(png_ptr, struct_ptr); - return; + return ret; } # endif /* PNG_USER_MEM_SUPPORTED */ -# if defined(__TURBOC__) && !defined(__FLAT__) - farfree(struct_ptr); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(struct_ptr); - -# else - free(struct_ptr); -# endif -# endif - } -} - -/* Allocate memory. For reasonable files, size should never exceed - * 64K. However, zlib may allocate more then 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does - * need to allocate exactly 64K, so whatever you call here must - * have the ability to do that. +/* This function was added at libpng version 1.2.3. The png_malloc_warn() + * function will issue a png_warning and return NULL instead of issuing a + * png_error, if it fails to allocate the requested memory. */ - PNG_FUNCTION(png_voidp,PNGAPI -png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +png_malloc_warn,(png_const_structrp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED) { - png_voidp ret; - - ret = (png_malloc(png_ptr, size)); - - if (ret != NULL) - png_memset(ret,0,(png_size_t)size); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) + if (png_ptr != NULL) { - png_voidp ret; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr == NULL || size == 0) - return (NULL); - - if (png_ptr->malloc_fn != NULL) - ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); + png_voidp ret = png_malloc_base(png_ptr, size); - else - ret = (png_malloc_default(png_ptr, size)); - - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); + if (ret != NULL) + return ret; - return (ret); + png_warning(png_ptr, "Out of memory"); } -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Cannot Allocate > 64K"); - - else -# endif return NULL; } -# endif - - /* Check for overflow */ -# if defined(__TURBOC__) && !defined(__FLAT__) - - if (size != (unsigned long)size) - ret = NULL; - - else - ret = farmalloc(size); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - if (size != (unsigned long)size) - ret = NULL; - - else - ret = halloc(size, 1); - -# else - if (size != (size_t)size) - ret = NULL; - - else - ret = malloc((size_t)size); -# endif -# endif - -# ifndef PNG_USER_MEM_SUPPORTED - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); -# endif - - return (ret); -} /* Free a pointer allocated by png_malloc(). If ptr is NULL, return * without taking any action. */ void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) +png_free(png_const_structrp png_ptr, png_voidp ptr) { if (png_ptr == NULL || ptr == NULL) return; # ifdef PNG_USER_MEM_SUPPORTED if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } + png_ptr->free_fn(png_constcast(png_structrp,png_ptr), ptr); else png_free_default(png_ptr, ptr); } -void PNGAPI -png_free_default(png_structp png_ptr, png_voidp ptr) +PNG_FUNCTION(void,PNGAPI +png_free_default,(png_const_structrp png_ptr, png_voidp ptr),PNG_DEPRECATED) { if (png_ptr == NULL || ptr == NULL) return; - # endif /* PNG_USER_MEM_SUPPORTED */ -# if defined(__TURBOC__) && !defined(__FLAT__) - farfree(ptr); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(ptr); - -# else free(ptr); - -# endif -# endif } -#endif /* Not Borland DOS special memory handler */ - -/* This function was added at libpng version 1.2.3. The png_malloc_warn() - * function will set up png_malloc() to issue a png_warning and return NULL - * instead of issuing a png_error, if it fails to allocate the requested - * memory. - */ -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ptr; - png_uint_32 save_flags; - if (png_ptr == NULL) - return (NULL); - - save_flags = png_ptr->flags; - png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; - ptr = (png_voidp)png_malloc((png_structp)png_ptr, size); - png_ptr->flags=save_flags; - return(ptr); -} - #ifdef PNG_USER_MEM_SUPPORTED /* This function is called when the application wants to use another method * of allocating and freeing memory. */ void PNGAPI -png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr +png_set_mem_fn(png_structrp png_ptr, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn) { if (png_ptr != NULL) { @@ -655,13 +203,13 @@ * functions. The application should free any memory associated with this * pointer before png_write_destroy and png_read_destroy are called. */ png_voidp PNGAPI -png_get_mem_ptr(png_const_structp png_ptr) +png_get_mem_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) - return (NULL); + return NULL; - return ((png_voidp)png_ptr->mem_ptr); + return png_ptr->mem_ptr; } #endif /* PNG_USER_MEM_SUPPORTED */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff -ru4NwbB libpng-1.5.10/pngpread.c libpng-1.6.0beta22/pngpread.c --- libpng-1.5.10/pngpread.c 2012-03-29 00:06:54.567379144 -0500 +++ libpng-1.6.0beta22/pngpread.c 2012-05-23 12:30:56.131344687 -0500 @@ -1,8 +1,8 @@ /* pngpread.c - read a png file in push mode * - * Last changed in libpng 1.5.9 [February 18, 2012] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -26,9 +26,9 @@ #define PNG_READ_iTXt_MODE 7 #define PNG_ERROR_MODE 8 void PNGAPI -png_process_data(png_structp png_ptr, png_infop info_ptr, +png_process_data(png_structrp png_ptr, png_inforp info_ptr, png_bytep buffer, png_size_t buffer_size) { if (png_ptr == NULL || info_ptr == NULL) return; @@ -41,9 +41,9 @@ } } png_size_t PNGAPI -png_process_data_pause(png_structp png_ptr, int save) +png_process_data_pause(png_structrp png_ptr, int save) { if (png_ptr != NULL) { /* It's easiest for the caller if we do the save, then the caller doesn't @@ -68,9 +68,9 @@ return 0; } png_uint_32 PNGAPI -png_process_data_skip(png_structp png_ptr) +png_process_data_skip(png_structrp png_ptr) { png_uint_32 remaining = 0; if (png_ptr != NULL && png_ptr->process_mode == PNG_SKIP_MODE && @@ -102,9 +102,9 @@ /* What we do with the incoming data depends on what we were previously * doing before we ran out of data... */ void /* PRIVATE */ -png_process_some_data(png_structp png_ptr, png_infop info_ptr) +png_process_some_data(png_structrp png_ptr, png_inforp info_ptr) { if (png_ptr == NULL) return; @@ -148,9 +148,9 @@ * checked by the calling application, or because of multiple calls to this * routine. */ void /* PRIVATE */ -png_push_read_sig(png_structp png_ptr, png_infop info_ptr) +png_push_read_sig(png_structrp png_ptr, png_inforp info_ptr) { png_size_t num_checked = png_ptr->sig_bytes, num_to_check = 8 - num_checked; @@ -182,9 +181,9 @@ } } void /* PRIVATE */ -png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) +png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr) { png_uint_32 chunk_name; /* First we make sure we have enough data for the 4 byte chunk name @@ -563,16 +562,16 @@ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; } void /* PRIVATE */ -png_push_crc_skip(png_structp png_ptr, png_uint_32 skip) +png_push_crc_skip(png_structrp png_ptr, png_uint_32 skip) { png_ptr->process_mode = PNG_SKIP_MODE; png_ptr->skip_length = skip; } void /* PRIVATE */ -png_push_crc_finish(png_structp png_ptr) +png_push_crc_finish(png_structrp png_ptr) { if (png_ptr->skip_length && png_ptr->save_buffer_size) { png_size_t save_size = png_ptr->save_buffer_size; @@ -678,9 +673,9 @@ } } void /* PRIVATE */ -png_push_save_buffer(png_structp png_ptr) +png_push_save_buffer(png_structrp png_ptr) { if (png_ptr->save_buffer_size) { if (png_ptr->save_buffer_ptr != png_ptr->save_buffer) @@ -712,9 +705,10 @@ } new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256; old_buffer = png_ptr->save_buffer; - png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, new_max); + png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, + (png_size_t)new_max); if (png_ptr->save_buffer == NULL) { png_free(png_ptr, old_buffer); @@ -738,9 +730,9 @@ png_ptr->buffer_size = 0; } void /* PRIVATE */ -png_push_restore_buffer(png_structp png_ptr, png_bytep buffer, +png_push_restore_buffer(png_structrp png_ptr, png_bytep buffer, png_size_t buffer_length) { png_ptr->current_buffer = buffer; png_ptr->current_buffer_size = buffer_length; @@ -748,9 +740,9 @@ png_ptr->current_buffer_ptr = png_ptr->current_buffer; } void /* PRIVATE */ -png_push_read_IDAT(png_structp png_ptr) +png_push_read_IDAT(png_structrp png_ptr) { if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) { png_byte chunk_length[4]; @@ -773,9 +765,9 @@ if (png_ptr->chunk_name != png_IDAT) { png_ptr->process_mode = PNG_READ_CHUNK_MODE; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + if (!(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)) png_error(png_ptr, "Not enough compressed data"); return; } @@ -846,13 +837,14 @@ png_crc_finish(png_ptr, 0); png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->zowner = 0; } } void /* PRIVATE */ -png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, +png_process_IDAT_data(png_structrp png_ptr, png_bytep buffer, png_size_t buffer_length) { /* The caller checks for a non-zero buffer length. */ if (!(buffer_length > 0) || buffer == NULL) @@ -862,15 +854,16 @@ * before returning, calling the row callback as required to * handle the uncompressed results. */ png_ptr->zstream.next_in = buffer; + /* TODO: WARNING: TRUNCATION ERROR: DANGER WILL ROBINSON: */ png_ptr->zstream.avail_in = (uInt)buffer_length; /* Keep going until the decompressed data is all processed * or the stream marked as finished. */ while (png_ptr->zstream.avail_in > 0 && - !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + !(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)) { int ret; /* We have data for zlib, but we must check that zlib @@ -879,11 +872,11 @@ * data is just the LZ end code. */ if (!(png_ptr->zstream.avail_out > 0)) { - png_ptr->zstream.avail_out = - (uInt) PNG_ROWBYTES(png_ptr->pixel_depth, - png_ptr->iwidth) + 1; + /* TODO: WARNING: TRUNCATION ERROR: DANGER WILL ROBINSON: */ + png_ptr->zstream.avail_out = (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth, + png_ptr->iwidth) + 1); png_ptr->zstream.next_out = png_ptr->row_buf; } @@ -899,9 +892,10 @@ /* Check for any failure before proceeding. */ if (ret != Z_OK && ret != Z_STREAM_END) { /* Terminate the decompression. */ - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; + png_ptr->zowner = 0; /* This may be a truncated stream (missing or * damaged end code). Treat that as a warning. */ @@ -927,9 +921,10 @@ png_ptr->pass > 6) { /* Extra data. */ png_warning(png_ptr, "Extra compressed data in IDAT"); - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; + png_ptr->zowner = 0; /* Do no more processing; skip the unprocessed * input check below. */ @@ -942,9 +937,9 @@ } /* And check for the end of the stream. */ if (ret == Z_STREAM_END) - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; } /* All the data should have been processed, if anything * is left at this point we have bytes of IDAT data @@ -954,9 +949,9 @@ png_warning(png_ptr, "Extra compression data in IDAT"); } void /* PRIVATE */ -png_push_process_row(png_structp png_ptr) +png_push_process_row(png_structrp png_ptr) { /* 1.5.6: row_info moved out of png_struct to a local here. */ png_row_info row_info; @@ -1183,28 +1178,28 @@ } } void /* PRIVATE */ -png_read_push_finish_row(png_structp png_ptr) +png_read_push_finish_row(png_structrp png_ptr) { #ifdef PNG_READ_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ - static PNG_CONST png_byte FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; + static PNG_CONST png_byte png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; /* Offset to next interlace block */ - static PNG_CONST png_byte FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; /* Start of interlace block in the y direction */ - static PNG_CONST png_byte FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; + static PNG_CONST png_byte png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; /* Offset to next interlace block in the y direction */ - static PNG_CONST png_byte FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; + static PNG_CONST png_byte png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; /* Height of interlace block. This is not currently used - if you need * it, uncomment it here and in png.h - static PNG_CONST png_byte FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; */ #endif png_ptr->row_number++; @@ -1249,32 +1244,32 @@ #endif /* PNG_READ_INTERLACING_SUPPORTED */ } void /* PRIVATE */ -png_push_have_info(png_structp png_ptr, png_infop info_ptr) +png_push_have_info(png_structrp png_ptr, png_inforp info_ptr) { if (png_ptr->info_fn != NULL) (*(png_ptr->info_fn))(png_ptr, info_ptr); } void /* PRIVATE */ -png_push_have_end(png_structp png_ptr, png_infop info_ptr) +png_push_have_end(png_structrp png_ptr, png_inforp info_ptr) { if (png_ptr->end_fn != NULL) (*(png_ptr->end_fn))(png_ptr, info_ptr); } void /* PRIVATE */ -png_push_have_row(png_structp png_ptr, png_bytep row) +png_push_have_row(png_structrp png_ptr, png_bytep row) { if (png_ptr->row_fn != NULL) (*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number, (int)png_ptr->pass); } #ifdef PNG_READ_INTERLACING_SUPPORTED void PNGAPI -png_progressive_combine_row (png_structp png_ptr, png_bytep old_row, +png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row, png_const_bytep new_row) { if (png_ptr == NULL) return; @@ -1288,9 +1283,9 @@ } #endif /* PNG_READ_INTERLACING_SUPPORTED */ void PNGAPI -png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr, +png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr, png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn) { if (png_ptr == NULL) @@ -1303,9 +1298,9 @@ png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer); } png_voidp PNGAPI -png_get_progressive_ptr(png_const_structp png_ptr) +png_get_progressive_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) return (NULL); diff -ru4NwbB libpng-1.5.10/pngpriv.h libpng-1.6.0beta22/pngpriv.h --- libpng-1.5.10/pngpriv.h 2012-03-29 00:06:54.496932731 -0500 +++ libpng-1.6.0beta22/pngpriv.h 2012-05-23 12:30:56.057609130 -0500 @@ -5,17 +5,17 @@ * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * - * Last changed in libpng 1.5.10 [(PENDING RELEASE)] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer * and license in png.h */ /* The symbols declared in this file (including the functions declared - * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public + * as extern) are PRIVATE. They are not part of the libpng public * interface, and are not recommended for use by regular applications. * Some of them may become public in the future; others may stay private, * change in an incompatible way, or even disappear. * Although the libpng users are not forbidden to include this header, @@ -38,18 +38,44 @@ * still required (as of 2011-05-02.) */ #define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ -/* This is required for the definition of abort(), used as a last ditch - * error handler when all else fails. - */ +/* Standard library headers not required by png.h: */ #include - -/* This is used to find 'offsetof', used below for alignment tests. */ -#include +#include #define PNGLIB_BUILD /*libpng is being built, not used*/ +/* If HAVE_CONFIG_H is defined during the build then the build system must + * provide an appropriate "config.h" file on the include path. The header file + * must provide definitions as required below (search for "HAVE_CONFIG_H"); + * see configure.ac for more details of the requirements. The macro + * "PNG_NO_CONFIG_H" is provided for maintainers to test for dependencies on + * 'configure'; define this macro to prevent the configure build including the + * configure generated config.h. Libpng is expected to compile without *any* + * special build system support on a reasonably ANSI-C compliant system. + */ +#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H) +# include + + /* Pick up the definition of 'restrict' from config.h if it was read: */ +# define PNG_RESTRICT restrict +#endif + +/* To support symbol prefixing it is necessary to know *before* including png.h + * whether the fixed point (and maybe other) APIs are exported, because if they + * are not internal definitions may be required. This is handled below just + * before png.h is included, but load the configuration now if it is available. + */ +#ifndef PNGLCONF_H +# include "pnglibconf.h" +#endif + +/* Local renames may change non-exported API functions from png.h */ +#if defined PNG_PREFIX && !defined PNGPREFIX_H +# include "pngprefix.h" +#endif + #ifdef PNG_USER_CONFIG # include "pngusr.h" /* These should have been defined in pngusr.h */ # ifndef PNG_USER_PRIVATEBUILD @@ -123,11 +149,46 @@ #ifndef PNG_PRIVATE # define PNG_PRIVATE #endif +/* Symbol preprocessing support. + * + * To enable listing global, but internal, symbols the following macros should + * always be used to declare an extern data or function object in this file. + */ +#ifndef PNG_INTERNAL_DATA +# define PNG_INTERNAL_DATA(type, name, array) extern type name array +#endif + +#ifndef PNG_INTERNAL_FUNCTION +# define PNG_INTERNAL_FUNCTION(type, name, args, attributes)\ + extern PNG_FUNCTION(type, name, args, PNG_EMPTY attributes) +#endif + +/* If floating or fixed point APIs are disabled they may still be compiled + * internally. To handle this make sure they are declared as the appropriate + * internal extern function (otherwise the symbol prefixing stuff won't work and + * the functions will be used without definitions.) + * + * NOTE: although all the API functions are declared here they are not all + * actually built! + */ +#ifndef PNG_FP_EXPORT +# ifndef PNG_FLOATING_POINT_SUPPORTED +# define PNG_FP_EXPORT(ordinal, type, name, args)\ + PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY); +# endif +#endif +#ifndef PNG_FIXED_EXPORT +# ifndef PNG_FIXED_POINT_SUPPORTED +# define PNG_FIXED_EXPORT(ordinal, type, name, args)\ + PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY); +# endif +#endif + #include "png.h" -#include "pnginfo.h" #include "pngstruct.h" +#include "pnginfo.h" /* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ #ifndef PNG_DLL_EXPORT # define PNG_DLL_EXPORT @@ -172,25 +232,12 @@ # define PNG_USER_CHUNK_MALLOC_MAX 0 # endif #endif -/* This is used for 16 bit gamma tables - only the top level pointers are const, - * this could be changed: +/* This is used for 16 bit gamma tables -- only the top level pointers are + * const; this could be changed: */ -typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; - -/* Added at libpng-1.2.9 */ -/* Moved to pngpriv.h at libpng-1.5.0 */ - -/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" - * script. We may need it here to get the correct configuration on things - * like limits. - */ -#ifdef PNG_CONFIGURE_LIBPNG -# ifdef HAVE_CONFIG_H -# include "config.h" -# endif -#endif +typedef const png_uint_16p * png_const_uint_16pp; /* Moved to pngpriv.h at libpng-1.5.0 */ /* NOTE: some of these may have been used in external applications as * these definitions were exposed in pngconf.h prior to 1.5. @@ -235,25 +282,8 @@ #ifndef PNG_STATIC # define PNG_STATIC static #endif -/* C99 restrict is used where possible, to do this 'restrict' is defined as - * empty if we can't be sure it is supported. configure builds have already - * done this work. - */ -#ifdef PNG_CONFIGURE_LIBPNG -# define PNG_RESTRICT restrict -#else - /* Modern compilers support restrict, but assume not for anything not - * recognized here: - */ -# if defined __GNUC__ || defined _MSC_VER || defined __WATCOMC__ -# define PNG_RESTRICT restrict -# else -# define PNG_RESTRICT -# endif -#endif - /* If warnings or errors are turned off the code is disabled or redirected here. * From 1.5.4 functions have been added to allow very limited formatting of * error and warning messages - this code will also be disabled here. */ @@ -280,25 +310,20 @@ * const is not cast away. */ #ifdef __cplusplus # define png_voidcast(type, value) static_cast(value) +# define png_constcast(type, value) const_cast(value) +# define png_aligncast(type, value) \ + static_cast(static_cast(value)) +# define png_aligncastconst(type, value) \ + static_cast(static_cast(value)) #else # define png_voidcast(type, value) (value) +# define png_constcast(type, value) ((type)(value)) +# define png_aligncast(type, value) ((void*)(value)) +# define png_aligncastconst(type, value) ((const void*)(value)) #endif /* __cplusplus */ -#ifndef PNG_EXTERN -/* The functions exported by PNG_EXTERN are internal functions, which - * aren't usually used outside the library (as far as I know), so it is - * debatable if they should be exported at all. In the future, when it - * is possible to have run-time registry of chunk-handling functions, - * some of these might be made available again. - * - * 1.5.7: turned the use of 'extern' back on, since it is localized to pngpriv.h - * it should be safe now (it is unclear why it was turned off.) - */ -# define PNG_EXTERN extern -#endif - /* Some fixed point APIs are still required even if not exported because * they get used by the corresponding floating point APIs. This magic * deals with this: */ @@ -366,35 +391,16 @@ # define PNG_ABORT() abort() # endif #endif -#ifdef USE_FAR_KEYWORD -/* Use this to make far-to-near assignments */ -# define CHECK 1 -# define NOCHECK 0 -# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) -# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) -# define png_strlen _fstrlen -# define png_memcmp _fmemcmp /* SJT: added */ -# define png_memcpy _fmemcpy -# define png_memset _fmemset -#else -# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */ -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strlen lstrlenA -# define png_memcmp memcmp -# define png_memcpy CopyMemory -# define png_memset memset -# else -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) +/* Prior to 1.6.0 if _WINDOWS_ was defined 'lstrlenA' and 'CopyMemory' were used + * in place of the ISOC90 functions; this is no longer done in 1.6.0, however + * the use of png_foo as a macro defined to the C function is retained. + */ # define png_strlen strlen -# define png_memcmp memcmp /* SJT: added */ +#define png_memcmp memcmp # define png_memcpy memcpy # define png_memset memset -# endif -#endif /* These macros may need to be architecture dependent. */ #define PNG_ALIGN_NONE 0 /* do not use data alignment */ #define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */ @@ -456,18 +462,19 @@ /* #define PNG_HAVE_PLTE 0x02 (defined in png.h) */ #define PNG_HAVE_IDAT 0x04 /* #define PNG_AFTER_IDAT 0x08 (defined in png.h) */ #define PNG_HAVE_IEND 0x10 -#define PNG_HAVE_gAMA 0x20 -#define PNG_HAVE_cHRM 0x40 -#define PNG_HAVE_sRGB 0x80 + /* 0x20 (unused) */ + /* 0x40 (unused) */ + /* 0x80 (unused) */ #define PNG_HAVE_CHUNK_HEADER 0x100 #define PNG_WROTE_tIME 0x200 #define PNG_WROTE_INFO_BEFORE_PLTE 0x400 #define PNG_BACKGROUND_IS_GRAY 0x800 #define PNG_HAVE_PNG_SIGNATURE 0x1000 #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ -#define PNG_HAVE_iCCP 0x4000 + /* 0x4000 (unused) */ +#define PNG_IS_READ_STRUCT 0x8000 /* Else is a write struct */ /* Flags for the transformations the PNG library does on the image data */ #define PNG_BGR 0x0001 #define PNG_INTERLACE 0x0002 @@ -510,13 +517,13 @@ #define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) /* Flags for the png_ptr->flags rather than declaring a byte for each one */ #define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 -#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 -#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 -#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 -#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 -#define PNG_FLAG_ZLIB_FINISHED 0x0020 +#define PNG_FLAG_ZSTREAM_INITIALIZED 0x0002 /* Added to libpng-1.6.0 */ + /* 0x0004 unused */ +#define PNG_FLAG_ZSTREAM_ENDED 0x0008 /* Added to libpng-1.6.0 */ + /* 0x0010 unused */ + /* 0x0020 unused */ #define PNG_FLAG_ROW_INIT 0x0040 #define PNG_FLAG_FILLER_AFTER 0x0080 #define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 @@ -529,17 +536,17 @@ #define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000 #define PNG_FLAG_LIBRARY_MISMATCH 0x20000 #define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000 #define PNG_FLAG_STRIP_ERROR_TEXT 0x80000 -#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000 - /* 0x200000 unused */ - /* 0x400000 unused */ -#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */ -#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */ -#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000 /* to libpng-1.5.4 */ -#define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000 -#define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000 -#define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000 +#define PNG_FLAG_BENIGN_ERRORS_WARN 0x100000 /* Added to libpng-1.4.0 */ +#define PNG_FLAG_APP_WARNINGS_WARN 0x200000 /* Added to libpng-1.6.0 */ +#define PNG_FLAG_APP_ERRORS_WARN 0x400000 /* Added to libpng-1.6.0 */ + /* 0x800000 unused */ + /* 0x1000000 unused */ + /* 0x2000000 unused */ + /* 0x4000000 unused */ + /* 0x8000000 unused */ + /* 0x10000000 unused */ /* 0x20000000 unused */ /* 0x40000000 unused */ #define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ @@ -550,26 +557,45 @@ #define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ PNG_FLAG_CRC_CRITICAL_MASK) -/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib - * can handle at once. This type need be no larger than 16 bits (so maximum of - * 65535), this define allows us to discover how big it is, but limited by the - * maximuum for png_size_t. The value can be overriden in a library build - * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably - * lower value (e.g. 255 works). A lower value may help memory usage (slightly) - * and may even improve performance on some systems (and degrade it on others.) - */ -#ifndef ZLIB_IO_MAX -# define ZLIB_IO_MAX ((uInt)-1) -#endif - /* Save typing and make code easier to understand */ #define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ abs((int)((c1).green) - (int)((c2).green)) + \ abs((int)((c1).blue) - (int)((c2).blue))) +/* Added to libpng-1.5.7: sRGB conversion tables */ +#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ + defined PNG_SIMPLIFIED_WRITE_SUPPORTED +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_table, [256]); + /* Convert from an sRGB encoded value 0..255 to a 16-bit linear value, + * 0..65535. This table gives the closest 16-bit answers (no errors). + */ +#endif + +PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]); +PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]); + +#define PNG_sRGB_FROM_LINEAR(linear) ((png_byte)((png_sRGB_base[(linear)>>15] +\ + ((((linear)&0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8)) + /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB + * encoded value with maximum error 0.646365. Note that the input is not a + * 16-bit value; it has been multiplied by 255! */ +#endif /* PNG_SIMPLIFIED_READ/WRITE */ + +/* Added to libpng-1.6.0: scale a 16-bit value in the range 0..65535 to 0..255 + * by dividing by 257 *with rounding*. This macro is exact for the given range. + * See the discourse in pngrtran.c png_do_scale_16_to_8. The values in the + * macro were established by experiment (modifying the added value). The macro + * has a second variant that takes a value already scaled by 255 and divides by + * 65535 - this has a maximum error of .502. Over the range 0..65535*65535 it + * only gives off-by-one errors and only for 0.5% (1 in 200) of the values. + */ +#define PNG_DIV65535(v24) (((v24) + 32895) >> 16) +#define PNG_DIV257(v16) PNG_DIV65535((png_uint_32)(v16) * 255) + /* Added to libpng-1.2.6 JB */ #define PNG_ROWBYTES(pixel_bits, width) \ ((pixel_bits) >= 8 ? \ ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \ @@ -615,12 +641,12 @@ */ #ifdef PNG_FIXED_POINT_MACRO_SUPPORTED #define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\ ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0)) -#else -PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, - png_const_charp text)); #endif +/* else the corresponding function is defined below, inside the scope of the + * cplusplus test. + */ #endif /* Constants for known chunk types. If you need to add a chunk, define the name * here. For historical reasons these constants have the form png_; i.e. @@ -697,251 +723,259 @@ #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ -/* These functions are used internally in the code. They generally - * shouldn't be used unless you are writing code to add or replace some - * functionality in libpng. More information about most functions can - * be found in the files where the functions are located. +/* Internal functions; these are not exported from a DLL however because they + * are used within several of the C source files they have to be C extern. + * + * All of these functions must be declared with PNG_INTERNAL_FUNCTION. + */ + +/* Zlib support */ +#define PNG_UNEXPECTED_ZLIB_RETURN (-7) +PNG_INTERNAL_FUNCTION(void, png_zstream_error,(png_structrp png_ptr, int ret), + PNG_EMPTY); + /* Used by the zlib handling functions to ensure that z_stream::msg is always + * set before they return. */ +#ifdef PNG_WRITE_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_free_buffer_list,(png_structrp png_ptr, + png_compression_bufferp *list),PNG_EMPTY); + /* Free the buffer list used by the compressed write code. */ +#endif + +#if defined PNG_FLOATING_POINT_SUPPORTED &&\ + !defined PNG_FIXED_POINT_MACRO_SUPPORTED +PNG_INTERNAL_FUNCTION(png_fixed_point,png_fixed,(png_const_structrp png_ptr, + double fp, png_const_charp text),PNG_EMPTY); +#endif + /* Check the user version string for compatibility, returns false if the version * numbers aren't compatible. */ -PNG_EXTERN int png_user_version_check(png_structp png_ptr, - png_const_charp user_png_ver); +PNG_INTERNAL_FUNCTION(int,png_user_version_check,(png_structrp png_ptr, + png_const_charp user_png_ver),PNG_EMPTY); -/* Allocate memory for an internal libpng struct */ -PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)), - PNG_ALLOCATED); +/* Internal base allocator - no messages, NULL on failure to allocate. This + * does, however, call the application provided allocator and that could call + * png_error (although that would be a bug in the application implementation.) + */ +PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_base,(png_const_structrp png_ptr, + png_alloc_size_t size),PNG_ALLOCATED); + +/* Magic to create a struct when there is no struct to call the user supplied + * memory allocators. Because error handling has not been set up the memory + * handlers can't safely call png_error, but this is an obscure and undocumented + * restriction so libpng has to assume that the 'free' handler, at least, might + * call png_error. + */ +PNG_INTERNAL_FUNCTION(png_structp,png_create_png_struct, + (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, + png_error_ptr warn_fn, png_voidp mem_ptr, png_malloc_ptr malloc_fn, + png_free_ptr free_fn),PNG_ALLOCATED); /* Free memory from internal libpng struct */ -PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); - -PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2, - PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)), - PNG_ALLOCATED); -PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, - png_free_ptr free_fn, png_voidp mem_ptr)); +PNG_INTERNAL_FUNCTION(void,png_destroy_png_struct,(png_structrp png_ptr), + PNG_EMPTY); -/* Free any memory that info_ptr points to and reset struct. */ -PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr)); +/* Free an allocated jmp_buf (always succeeds) */ +PNG_INTERNAL_FUNCTION(void,png_free_jmpbuf,(png_structrp png_ptr),PNG_EMPTY); /* Function to allocate memory for zlib. PNGAPI is disallowed. */ -PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items, - uInt size)),PNG_ALLOCATED); +PNG_INTERNAL_FUNCTION(voidpf,png_zalloc,(voidpf png_ptr, uInt items, uInt size), + PNG_ALLOCATED); /* Function to free memory for zlib. PNGAPI is disallowed. */ -PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); +PNG_INTERNAL_FUNCTION(void,png_zfree,(voidpf png_ptr, voidpf ptr),PNG_EMPTY); /* Next four functions are used internally as callbacks. PNGCBAPI is required * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to * PNGCBAPI at 1.5.0 */ -PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); +PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_read_data,(png_structp png_ptr, + png_bytep data, png_size_t length),PNG_EMPTY); #ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t length)); +PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_push_fill_buffer,(png_structp png_ptr, + png_bytep buffer, png_size_t length),PNG_EMPTY); #endif -PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); +PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_write_data,(png_structp png_ptr, + png_bytep data, png_size_t length),PNG_EMPTY); #ifdef PNG_WRITE_FLUSH_SUPPORTED # ifdef PNG_STDIO_SUPPORTED -PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_flush,(png_structp png_ptr), + PNG_EMPTY); # endif #endif /* Reset the CRC variable */ -PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_reset_crc,(png_structrp png_ptr),PNG_EMPTY); /* Write the "data" buffer to whatever output you are using */ -PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, - png_const_bytep data, png_size_t length)); +PNG_INTERNAL_FUNCTION(void,png_write_data,(png_structrp png_ptr, + png_const_bytep data, png_size_t length),PNG_EMPTY); /* Read and check the PNG file signature */ -PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_read_sig,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); /* Read the chunk header (length + type name) */ -PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(png_uint_32,png_read_chunk_header,(png_structrp png_ptr), + PNG_EMPTY); /* Read data from whatever input you are using into the "data" buffer */ -PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); +PNG_INTERNAL_FUNCTION(void,png_read_data,(png_structrp png_ptr, png_bytep data, + png_size_t length),PNG_EMPTY); /* Read bytes into buf, and update png_ptr->crc */ -PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, - png_size_t length)); - -/* Decompress data in a chunk that uses compression */ -#if defined(PNG_READ_COMPRESSED_TEXT_SUPPORTED) -PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, - int comp_type, png_size_t chunklength, png_size_t prefix_length, - png_size_t *data_length)); -#endif +PNG_INTERNAL_FUNCTION(void,png_crc_read,(png_structrp png_ptr, png_bytep buf, + png_uint_32 length),PNG_EMPTY); /* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ -PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); +PNG_INTERNAL_FUNCTION(int,png_crc_finish,(png_structrp png_ptr, + png_uint_32 skip),PNG_EMPTY); /* Read the CRC from the file and compare it to the libpng calculated CRC */ -PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(int,png_crc_error,(png_structrp png_ptr),PNG_EMPTY); /* Calculate the CRC over a section of data. Note that we are only * passing a maximum of 64K on systems that have this as a memory limit, * since this is the maximum buffer size we can specify. */ -PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, - png_const_bytep ptr, png_size_t length)); +PNG_INTERNAL_FUNCTION(void,png_calculate_crc,(png_structrp png_ptr, + png_const_bytep ptr, png_size_t length),PNG_EMPTY); #ifdef PNG_WRITE_FLUSH_SUPPORTED -PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_flush,(png_structrp png_ptr),PNG_EMPTY); #endif /* Write various chunks */ /* Write the IHDR chunk, and update the png_struct with the necessary * information. */ -PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, - png_uint_32 height, - int bit_depth, int color_type, int compression_method, int filter_method, - int interlace_method)); - -PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, - png_const_colorp palette, png_uint_32 num_pal)); +PNG_INTERNAL_FUNCTION(void,png_write_IHDR,(png_structrp png_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, + int compression_method, int filter_method, int interlace_method),PNG_EMPTY); + +PNG_INTERNAL_FUNCTION(void,png_write_PLTE,(png_structrp png_ptr, + png_const_colorp palette, png_uint_32 num_pal),PNG_EMPTY); + +PNG_INTERNAL_FUNCTION(void,png_compress_IDAT,(png_structrp png_ptr, + png_const_bytep row_data, png_alloc_size_t row_data_length, int flush), + PNG_EMPTY); -PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_write_IEND,(png_structrp png_ptr),PNG_EMPTY); #ifdef PNG_WRITE_gAMA_SUPPORTED -# ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); -# endif -# ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, - png_fixed_point file_gamma)); -# endif +PNG_INTERNAL_FUNCTION(void,png_write_gAMA_fixed,(png_structrp png_ptr, + png_fixed_point file_gamma),PNG_EMPTY); #endif #ifdef PNG_WRITE_sBIT_SUPPORTED -PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, - png_const_color_8p sbit, int color_type)); +PNG_INTERNAL_FUNCTION(void,png_write_sBIT,(png_structrp png_ptr, + png_const_color_8p sbit, int color_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_cHRM_SUPPORTED -# ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, - double white_x, double white_y, - double red_x, double red_y, double green_x, double green_y, - double blue_x, double blue_y)); -# endif -PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); +PNG_INTERNAL_FUNCTION(void,png_write_cHRM_fixed,(png_structrp png_ptr, + const png_xy *xy), PNG_EMPTY); + /* The xy value must have been previously validated */ #endif #ifdef PNG_WRITE_sRGB_SUPPORTED -PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, - int intent)); +PNG_INTERNAL_FUNCTION(void,png_write_sRGB,(png_structrp png_ptr, + int intent),PNG_EMPTY); #endif #ifdef PNG_WRITE_iCCP_SUPPORTED -PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, - png_const_charp name, int compression_type, - png_const_charp profile, int proflen)); - /* Note to maintainer: profile should be png_bytep */ +PNG_INTERNAL_FUNCTION(void,png_write_iCCP,(png_structrp png_ptr, + png_const_charp name, png_const_bytep profile), PNG_EMPTY); + /* The profile must have been previously validated for correctness, the + * length comes from the first four bytes. Only the base, deflate, + * compression is supported. + */ #endif #ifdef PNG_WRITE_sPLT_SUPPORTED -PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, - png_const_sPLT_tp palette)); +PNG_INTERNAL_FUNCTION(void,png_write_sPLT,(png_structrp png_ptr, + png_const_sPLT_tp palette),PNG_EMPTY); #endif #ifdef PNG_WRITE_tRNS_SUPPORTED -PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_write_tRNS,(png_structrp png_ptr, png_const_bytep trans, png_const_color_16p values, int number, - int color_type)); + int color_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_bKGD_SUPPORTED -PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, - png_const_color_16p values, int color_type)); +PNG_INTERNAL_FUNCTION(void,png_write_bKGD,(png_structrp png_ptr, + png_const_color_16p values, int color_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_hIST_SUPPORTED -PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, - png_const_uint_16p hist, int num_hist)); +PNG_INTERNAL_FUNCTION(void,png_write_hIST,(png_structrp png_ptr, + png_const_uint_16p hist, int num_hist),PNG_EMPTY); #endif /* Chunks that have keywords */ -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ - defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) -PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, - png_const_charp key, png_charpp new_key)); -#endif - #ifdef PNG_WRITE_tEXt_SUPPORTED -PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key, - png_const_charp text, png_size_t text_len)); +PNG_INTERNAL_FUNCTION(void,png_write_tEXt,(png_structrp png_ptr, + png_const_charp key, png_const_charp text, png_size_t text_len),PNG_EMPTY); #endif #ifdef PNG_WRITE_zTXt_SUPPORTED -PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key, - png_const_charp text, png_size_t text_len, int compression)); +PNG_INTERNAL_FUNCTION(void,png_write_zTXt,(png_structrp png_ptr, png_const_charp key, + png_const_charp text, png_size_t text_len, int compression),PNG_EMPTY); #endif #ifdef PNG_WRITE_iTXt_SUPPORTED -PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_write_iTXt,(png_structrp png_ptr, int compression, png_const_charp key, png_const_charp lang, - png_const_charp lang_key, png_const_charp text)); + png_const_charp lang_key, png_const_charp text),PNG_EMPTY); #endif #ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ -PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, - png_infop info_ptr, png_const_textp text_ptr, int num_text)); +PNG_INTERNAL_FUNCTION(int,png_set_text_2,(png_const_structrp png_ptr, + png_inforp info_ptr, png_const_textp text_ptr, int num_text),PNG_EMPTY); #endif #ifdef PNG_WRITE_oFFs_SUPPORTED -PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, - png_int_32 x_offset, png_int_32 y_offset, int unit_type)); +PNG_INTERNAL_FUNCTION(void,png_write_oFFs,(png_structrp png_ptr, + png_int_32 x_offset, png_int_32 y_offset, int unit_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_pCAL_SUPPORTED -PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, +PNG_INTERNAL_FUNCTION(void,png_write_pCAL,(png_structrp png_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, - png_const_charp units, png_charpp params)); + png_const_charp units, png_charpp params),PNG_EMPTY); #endif #ifdef PNG_WRITE_pHYs_SUPPORTED -PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_write_pHYs,(png_structrp png_ptr, png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, - int unit_type)); + int unit_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_tIME_SUPPORTED -PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, - png_const_timep mod_time)); +PNG_INTERNAL_FUNCTION(void,png_write_tIME,(png_structrp png_ptr, + png_const_timep mod_time),PNG_EMPTY); #endif #ifdef PNG_WRITE_sCAL_SUPPORTED -PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, - int unit, png_const_charp width, png_const_charp height)); +PNG_INTERNAL_FUNCTION(void,png_write_sCAL_s,(png_structrp png_ptr, + int unit, png_const_charp width, png_const_charp height),PNG_EMPTY); #endif /* Called when finished processing a row of data */ -PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_write_finish_row,(png_structrp png_ptr),PNG_EMPTY); /* Internal use only. Called before first row of data */ -PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_write_start_row,(png_structrp png_ptr),PNG_EMPTY); /* Combine a row of data, dealing with alpha, etc. if requested. 'row' is an * array of png_ptr->width pixels. If the image is not interlaced or this * is the final pass this just does a png_memcpy, otherwise the "display" flag @@ -967,466 +1001,494 @@ */ #ifndef PNG_USE_COMPILE_TIME_MASKS # define PNG_USE_COMPILE_TIME_MASKS 1 #endif -PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, - int display)); +PNG_INTERNAL_FUNCTION(void,png_combine_row,(png_const_structrp png_ptr, + png_bytep row, int display),PNG_EMPTY); #ifdef PNG_READ_INTERLACING_SUPPORTED /* Expand an interlaced row: the 'row_info' describes the pass data that has * been read in and must correspond to the pixels in 'row', the pixels are * expanded (moved apart) in 'row' to match the final layout, when doing this * the pixels are *replicated* to the intervening space. This is essential for * the correct operation of png_combine_row, above. */ -PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass, png_uint_32 transformations)); +PNG_INTERNAL_FUNCTION(void,png_do_read_interlace,(png_row_infop row_info, + png_bytep row, int pass, png_uint_32 transformations),PNG_EMPTY); #endif /* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Grab pixels out of a row for an interlaced pass */ -PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass)); +PNG_INTERNAL_FUNCTION(void,png_do_write_interlace,(png_row_infop row_info, + png_bytep row, int pass),PNG_EMPTY); #endif /* Unfilter a row: check the filter value before calling this, there is no point * calling it for PNG_FILTER_VALUE_NONE. */ -PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop row_info, - png_bytep row, png_const_bytep prev_row, int filter)); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row,(png_structrp pp, png_row_infop row_info, + png_bytep row, png_const_bytep prev_row, int filter),PNG_EMPTY); -PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_sub3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_sub4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_avg3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_avg4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_paeth3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_paeth4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_up_neon,(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub3_neon,(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub4_neon,(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg3_neon,(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg4_neon,(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth3_neon,(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_neon,(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row),PNG_EMPTY); /* Choose the best filter to use and filter the row data */ -PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, - png_row_infop row_info)); +PNG_INTERNAL_FUNCTION(void,png_write_find_filter,(png_structrp png_ptr, + png_row_infop row_info),PNG_EMPTY); + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_read_IDAT_data,(png_structrp png_ptr, + png_bytep output, png_alloc_size_t avail_out),PNG_EMPTY); + /* Read 'avail_out' bytes of data from the IDAT stream. If the output buffer + * is NULL the function checks, instead, for the end of the stream. In this + * case a benign error will be issued if the stream end is not found or if + * extra data has to be consumed. + */ +PNG_INTERNAL_FUNCTION(void,png_read_finish_IDAT,(png_structrp png_ptr), + PNG_EMPTY); + /* This cleans up when the IDAT LZ stream does not end when the last image + * byte is read; there is still some pending input. + */ +PNG_INTERNAL_FUNCTION(void,png_read_finish_row,(png_structrp png_ptr), + PNG_EMPTY); /* Finish a row while reading, dealing with interlacing passes, etc. */ -PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); +#endif /* Initialize the row buffers, etc. */ -PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_read_start_row,(png_structrp png_ptr),PNG_EMPTY); #ifdef PNG_READ_TRANSFORMS_SUPPORTED /* Optional call to update the users info structure */ -PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_read_transform_info,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); #endif /* These are the functions that do the transformations */ #ifdef PNG_READ_FILLER_SUPPORTED -PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 filler, png_uint_32 flags)); +PNG_INTERNAL_FUNCTION(void,png_do_read_filler,(png_row_infop row_info, + png_bytep row, png_uint_32 filler, png_uint_32 flags),PNG_EMPTY); #endif #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED -PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_read_swap_alpha,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED -PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_write_swap_alpha,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED -PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_read_invert_alpha,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED -PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_write_invert_alpha,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info, - png_bytep row, int at_start)); +PNG_INTERNAL_FUNCTION(void,png_do_strip_channel,(png_row_infop row_info, + png_bytep row, int at_start),PNG_EMPTY); #endif #ifdef PNG_16BIT_SUPPORTED #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_swap,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #endif #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ defined(PNG_WRITE_PACKSWAP_SUPPORTED) -PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_packswap,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, - png_row_infop row_info, png_bytep row)); +PNG_INTERNAL_FUNCTION(int,png_do_rgb_to_gray,(png_structrp png_ptr, + png_row_infop row_info, png_bytep row),PNG_EMPTY); #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED -PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_gray_to_rgb,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_READ_PACK_SUPPORTED -PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_unpack,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_READ_SHIFT_SUPPORTED -PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_8p sig_bits)); +PNG_INTERNAL_FUNCTION(void,png_do_unshift,(png_row_infop row_info, + png_bytep row, png_const_color_8p sig_bits),PNG_EMPTY); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_invert,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED -PNG_EXTERN void png_do_scale_16_to_8 PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_scale_16_to_8,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED -PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_chop,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED -PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info, +PNG_INTERNAL_FUNCTION(void,png_do_quantize,(png_row_infop row_info, png_bytep row, png_const_bytep palette_lookup, - png_const_bytep quantize_lookup)); + png_const_bytep quantize_lookup),PNG_EMPTY); # ifdef PNG_CORRECT_PALETTE_SUPPORTED -PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette)); +PNG_INTERNAL_FUNCTION(void,png_correct_palette,(png_structrp png_ptr, + png_colorp palette, int num_palette),PNG_EMPTY); # endif #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_bgr,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #ifdef PNG_WRITE_PACK_SUPPORTED -PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 bit_depth)); +PNG_INTERNAL_FUNCTION(void,png_do_pack,(png_row_infop row_info, + png_bytep row, png_uint_32 bit_depth),PNG_EMPTY); #endif #ifdef PNG_WRITE_SHIFT_SUPPORTED -PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_8p bit_depth)); +PNG_INTERNAL_FUNCTION(void,png_do_shift,(png_row_infop row_info, + png_bytep row, png_const_color_8p bit_depth),PNG_EMPTY); #endif #if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ defined(PNG_READ_ALPHA_MODE_SUPPORTED) -PNG_EXTERN void png_do_compose PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_do_compose,(png_row_infop row_info, + png_bytep row, png_structrp png_ptr),PNG_EMPTY); #endif #ifdef PNG_READ_GAMMA_SUPPORTED -PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_do_gamma,(png_row_infop row_info, + png_bytep row, png_structrp png_ptr),PNG_EMPTY); #endif #ifdef PNG_READ_ALPHA_MODE_SUPPORTED -PNG_EXTERN void png_do_encode_alpha PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_do_encode_alpha,(png_row_infop row_info, + png_bytep row, png_structrp png_ptr),PNG_EMPTY); #endif #ifdef PNG_READ_EXPAND_SUPPORTED -PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, +PNG_INTERNAL_FUNCTION(void,png_do_expand_palette,(png_row_infop row_info, png_bytep row, png_const_colorp palette, png_const_bytep trans, - int num_trans)); -PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_16p trans_color)); + int num_trans),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_do_expand,(png_row_infop row_info, + png_bytep row, png_const_color_16p trans_color),PNG_EMPTY); #endif #ifdef PNG_READ_EXPAND_16_SUPPORTED -PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_expand_16,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif /* The following decodes the appropriate chunks, and does error correction, * then calls the appropriate callback for the chunk if it is valid. */ /* Decode the IHDR chunk */ -PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_IHDR,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_handle_PLTE,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_handle_IEND,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #ifdef PNG_READ_bKGD_SUPPORTED -PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_bKGD,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_cHRM_SUPPORTED -PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_cHRM,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_gAMA_SUPPORTED -PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_gAMA,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_hIST_SUPPORTED -PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_hIST,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_iCCP_SUPPORTED -PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_iCCP,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif /* PNG_READ_iCCP_SUPPORTED */ #ifdef PNG_READ_iTXt_SUPPORTED -PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_iTXt,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_oFFs_SUPPORTED -PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_oFFs,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_pCAL_SUPPORTED -PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_pCAL,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_pHYs_SUPPORTED -PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_pHYs,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_sBIT_SUPPORTED -PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_sBIT,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_sCAL_SUPPORTED -PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_sCAL,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_sPLT_SUPPORTED -PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_sPLT,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif /* PNG_READ_sPLT_SUPPORTED */ #ifdef PNG_READ_sRGB_SUPPORTED -PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_sRGB,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_tEXt_SUPPORTED -PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_tEXt,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_tIME_SUPPORTED -PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_tIME,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_tRNS_SUPPORTED -PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_tRNS,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_zTXt_SUPPORTED -PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_zTXt,(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length),PNG_EMPTY); #endif -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -#endif +PNG_INTERNAL_FUNCTION(void,png_handle_unknown,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); -PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, - png_uint_32 chunk_name)); +PNG_INTERNAL_FUNCTION(void,png_check_chunk_name,(png_structrp png_ptr, + png_uint_32 chunk_name),PNG_EMPTY); #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED /* Exactly as png_handle_as_unknown() except that the argument is a 32-bit chunk * name, not a string. */ -PNG_EXTERN int png_chunk_unknown_handling PNGARG((png_structp png_ptr, - png_uint_32 chunk_name)); +PNG_INTERNAL_FUNCTION(int,png_chunk_unknown_handling,(png_structrp png_ptr, + png_uint_32 chunk_name),PNG_EMPTY); #endif /* Handle the transformations for reading and writing */ #ifdef PNG_READ_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr, - png_row_infop row_info)); +PNG_INTERNAL_FUNCTION(void,png_do_read_transformations,(png_structrp png_ptr, + png_row_infop row_info),PNG_EMPTY); #endif #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr, - png_row_infop row_info)); +PNG_INTERNAL_FUNCTION(void,png_do_write_transformations,(png_structrp png_ptr, + png_row_infop row_info),PNG_EMPTY); #endif #ifdef PNG_READ_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_init_read_transformations,(png_structrp png_ptr),PNG_EMPTY); #endif #ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, - png_uint_32 length)); -PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); -PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_push_read_chunk,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_sig,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_check_crc,(png_structrp png_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_crc_skip,(png_structrp png_ptr, + png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_crc_finish,(png_structrp png_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_save_buffer,(png_structrp png_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_restore_buffer,(png_structrp png_ptr, + png_bytep buffer, png_size_t buffer_length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_IDAT,(png_structrp png_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_process_IDAT_data,(png_structrp png_ptr, + png_bytep buffer, png_size_t buffer_length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_process_row,(png_structrp png_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_handle_unknown,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_have_info,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_have_end,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_have_row,(png_structrp png_ptr, png_bytep row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_end,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_process_some_data,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_push_finish_row,(png_structrp png_ptr),PNG_EMPTY); # ifdef PNG_READ_tEXt_SUPPORTED -PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_push_handle_tEXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_tEXt,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); # endif # ifdef PNG_READ_zTXt_SUPPORTED -PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_push_handle_zTXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_zTXt,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); # endif # ifdef PNG_READ_iTXt_SUPPORTED -PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_push_handle_iTXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_iTXt,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); # endif #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ #ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); -PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_read_intrapixel,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_do_write_intrapixel,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); +#endif + +/* Added at libpng version 1.6.0 */ +#ifdef PNG_GAMMA_SUPPORTED +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_gamma,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_fixed_point gAMA, int preferred), + PNG_EMPTY); + +PNG_INTERNAL_FUNCTION(void,png_colorspace_sync_info,(png_const_structrp png_ptr, + png_inforp info_ptr), PNG_EMPTY); + /* Synchronize the info 'valid' flags with the colorspace */ + +PNG_INTERNAL_FUNCTION(void,png_colorspace_sync,(png_const_structrp png_ptr, + png_inforp info_ptr), PNG_EMPTY); + /* Copy the png_struct colorspace to the info_struct and call the above to + * synchronize the flags. Checks for NULL info_ptr and does nothing. + */ #endif /* Added at libpng version 1.4.0 */ -#ifdef PNG_CHECK_cHRM_SUPPORTED -PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -#endif - -#ifdef PNG_CHECK_cHRM_SUPPORTED -/* Added at libpng version 1.2.34 and 1.4.0 */ -/* Currently only used by png_check_cHRM_fixed */ -PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, - unsigned long *hi_product, unsigned long *lo_product)); -#endif - -#ifdef PNG_cHRM_SUPPORTED -/* Added at libpng version 1.5.5 */ -typedef struct png_xy -{ - png_fixed_point redx, redy; - png_fixed_point greenx, greeny; - png_fixed_point bluex, bluey; - png_fixed_point whitex, whitey; -} png_xy; +#ifdef PNG_COLORSPACE_SUPPORTED +/* These internal functions are for maintaining the colorspace structure within + * a png_info or png_struct (or, indeed, both). + */ +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_chromaticities, + (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_xy *xy, + int preferred), PNG_EMPTY); + +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_endpoints, + (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_XYZ *XYZ, + int preferred), PNG_EMPTY); + +#ifdef PNG_sRGB_SUPPORTED +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_sRGB,(png_const_structrp png_ptr, + png_colorspacerp colorspace, int intent, int preferred), PNG_EMPTY); +#endif /* sRGB */ + +#ifdef PNG_iCCP_SUPPORTED +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_ICC,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, + png_uint_32 profile_length, png_const_bytep profile, int preferred), + PNG_EMPTY); + /* The 'name' is used for information only */ + +/* Routines for checking parts of an ICC profile. */ +PNG_INTERNAL_FUNCTION(int,png_icc_check_length,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, + png_uint_32 profile_length), PNG_EMPTY); +PNG_INTERNAL_FUNCTION(int,png_icc_check_header,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, + png_uint_32 profile_length, + png_const_bytep profile /* first 132 bytes only */), PNG_EMPTY); +PNG_INTERNAL_FUNCTION(int,png_icc_check_tag_table,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, + png_uint_32 profile_length, + png_const_bytep profile /* header plus whole tag table */), PNG_EMPTY); +PNG_INTERNAL_FUNCTION(int,png_icc_set_gAMA_and_cHRM,( + png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_const_bytep profile, uLong adler, int preferred), + PNG_EMPTY); + /* 'adler' is the Adler32 checksum of the uncompressed profile data, it may + * be 0 to indicate that it is not available. It is used, if provided, as a + * fast check on the profile when checking to see if it is sRGB. + */ +#endif /* iCCP */ -typedef struct png_XYZ -{ - png_fixed_point redX, redY, redZ; - png_fixed_point greenX, greenY, greenZ; - png_fixed_point blueX, blueY, blueZ; -} png_XYZ; - -/* The conversion APIs return 0 on success, non-zero on a parameter error. They - * allow conversion between the above representations of a color encoding. When - * converting from XYZ end points to chromaticities the absolute magnitude of - * the end points is lost, when converting back the sum of the Y values of the - * three end points will be 1.0 - */ -PNG_EXTERN int png_xy_from_XYZ PNGARG((png_xy *xy, png_XYZ XYZ)); -PNG_EXTERN int png_XYZ_from_xy PNGARG((png_XYZ *XYZ, png_xy xy)); -PNG_EXTERN int png_XYZ_from_xy_checked PNGARG((png_structp png_ptr, - png_XYZ *XYZ, png_xy xy)); -#endif +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_colorspace_set_rgb_coefficients, + (png_structrp png_ptr), PNG_EMPTY); + /* Set the rgb_to_gray coefficients from the colorspace Y values */ +#endif /* READ_RGB_TO_GRAY */ +#endif /* COLORSPACE */ /* Added at libpng version 1.4.0 */ -PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_check_IHDR,(png_const_structrp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, - int filter_type)); + int filter_type),PNG_EMPTY); /* Added at libpng version 1.5.10 */ #if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED) -PNG_EXTERN void png_do_check_palette_indexes PNGARG((png_structp png_ptr, - png_row_infop row_info)); +PNG_INTERNAL_FUNCTION(void,png_do_check_palette_indexes, + (png_structrp png_ptr, png_row_infop row_info),PNG_EMPTY); #endif -/* Free all memory used by the read (old method - NOT DLL EXPORTED) */ -PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr, png_infop end_info_ptr)); - -/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ -PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr)); - -#ifdef USE_FAR_KEYWORD /* memory model conversion function */ -PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr, - int check)); -#endif /* USE_FAR_KEYWORD */ - #if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) -PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_fixed_error,(png_const_structrp png_ptr, png_const_charp name),PNG_NORETURN); #endif /* Puts 'string' into 'buffer' at buffer[pos], taking care never to overwrite * the end. Always leaves the buffer nul terminated. Never errors out (and * there is no error code.) */ -PNG_EXTERN size_t png_safecat(png_charp buffer, size_t bufsize, size_t pos, - png_const_charp string); +PNG_INTERNAL_FUNCTION(size_t,png_safecat,(png_charp buffer, size_t bufsize, + size_t pos, png_const_charp string),PNG_EMPTY); /* Various internal functions to handle formatted warning messages, currently * only implemented for warnings. */ @@ -1435,10 +1497,10 @@ * and end pointer (which should point just *beyond* the end of the buffer!) * Returns the pointer to the start of the formatted string. This utility only * does unsigned values. */ -PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end, - int format, png_alloc_size_t number); +PNG_INTERNAL_FUNCTION(png_charp,png_format_number,(png_const_charp start, + png_charp end, int format, png_alloc_size_t number),PNG_EMPTY); /* Convenience macro that takes an array: */ #define PNG_FORMAT_NUMBER(buffer,format,number) \ png_format_number(buffer, buffer + (sizeof buffer), format, number) @@ -1460,56 +1522,90 @@ #ifdef PNG_WARNINGS_SUPPORTED /* New defines and members adding in libpng-1.5.4 */ # define PNG_WARNING_PARAMETER_SIZE 32 -# define PNG_WARNING_PARAMETER_COUNT 8 +# define PNG_WARNING_PARAMETER_COUNT 8 /* Maximum 9; see pngerror.c */ /* An l-value of this type has to be passed to the APIs below to cache the * values of the parameters to a formatted warning message. */ typedef char png_warning_parameters[PNG_WARNING_PARAMETER_COUNT][ PNG_WARNING_PARAMETER_SIZE]; -PNG_EXTERN void png_warning_parameter(png_warning_parameters p, int number, - png_const_charp string); +PNG_INTERNAL_FUNCTION(void,png_warning_parameter,(png_warning_parameters p, + int number, png_const_charp string),PNG_EMPTY); /* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters, * including the trailing '\0'. */ -PNG_EXTERN void png_warning_parameter_unsigned(png_warning_parameters p, - int number, int format, png_alloc_size_t value); +PNG_INTERNAL_FUNCTION(void,png_warning_parameter_unsigned, + (png_warning_parameters p, int number, int format, png_alloc_size_t value), + PNG_EMPTY); /* Use png_alloc_size_t because it is an unsigned type as big as any we * need to output. Use the following for a signed value. */ -PNG_EXTERN void png_warning_parameter_signed(png_warning_parameters p, - int number, int format, png_int_32 value); +PNG_INTERNAL_FUNCTION(void,png_warning_parameter_signed, + (png_warning_parameters p, int number, int format, png_int_32 value), + PNG_EMPTY); -PNG_EXTERN void png_formatted_warning(png_structp png_ptr, - png_warning_parameters p, png_const_charp message); +PNG_INTERNAL_FUNCTION(void,png_formatted_warning,(png_const_structrp png_ptr, + png_warning_parameters p, png_const_charp message),PNG_EMPTY); /* 'message' follows the X/Open approach of using @1, @2 to insert * parameters previously supplied using the above functions. Errors in - * specifying the paramters will simple result in garbage substitutions. + * specifying the parameters will simple result in garbage substitutions. + */ +#endif + +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +/* Application errors (new in 1.6); use these functions (declared below) for + * errors in the parameters or order of API function calls on read. The + * 'warning' should be used for an error that can be handled completely, the + * 'error' for one which can be handled safely but which may lose application + * information or settings. + * + * By default these both result in a png_error call prior to release, while in a + * released version the 'warning' is just a warning. However if the application + * explicitly disables benign errors (explicitly permitting the code to lose + * information) they both turn into warnings. + * + * If benign errors aren't supported they end up as the corresponding base call + * (png_warning or png_error.) */ +PNG_INTERNAL_FUNCTION(void,png_app_warning,(png_const_structrp png_ptr, + png_const_charp message),PNG_EMPTY); + /* The application provided invalid parameters to an API function or called + * an API function at the wrong time, libpng can completely recovered. + */ + +PNG_INTERNAL_FUNCTION(void,png_app_error,(png_const_structrp png_ptr, + png_const_charp message),PNG_EMPTY); + /* As above but libpng will ignore the call, or attempt some other partial + * recovery from the error. + */ +#else +# define png_app_warning(pp,s) png_warning(pp,s) +# define png_app_error(pp,s) png_error(pp,s) #endif /* ASCII to FP interfaces, currently only implemented if sCAL * support is required. */ #if defined(PNG_READ_sCAL_SUPPORTED) /* MAX_DIGITS is actually the maximum number of characters in an sCAL * width or height, derived from the precision (number of significant - * digits - a build time settable option) and assumpitions about the + * digits - a build time settable option) and assumptions about the * maximum ridiculous exponent. */ #define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/) #ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii, - png_size_t size, double fp, unsigned int precision)); +PNG_INTERNAL_FUNCTION(void,png_ascii_from_fp,(png_const_structrp png_ptr, + png_charp ascii, png_size_t size, double fp, unsigned int precision), + PNG_EMPTY); #endif /* FLOATING_POINT */ #ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr, - png_charp ascii, png_size_t size, png_fixed_point fp)); +PNG_INTERNAL_FUNCTION(void,png_ascii_from_fixed,(png_const_structrp png_ptr, + png_charp ascii, png_size_t size, png_fixed_point fp),PNG_EMPTY); #endif /* FIXED_POINT */ #endif /* READ_sCAL */ #if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) @@ -1599,19 +1695,19 @@ * the parser again (from the start, with state 0) but with a string * that omits the last character (i.e. set the size to the index of * the problem character.) This has not been tested within libpng. */ -PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string, - png_size_t size, int *statep, png_size_tp whereami)); +PNG_INTERNAL_FUNCTION(int,png_check_fp_number,(png_const_charp string, + png_size_t size, int *statep, png_size_tp whereami),PNG_EMPTY); /* This is the same but it checks a complete string and returns true * only if it just contains a floating point number. As of 1.5.4 this * function also returns the state at the end of parsing the number if * it was valid (otherwise it returns 0.) This can be used for testing * for negative or zero values using the sticky flag. */ -PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string, - png_size_t size)); +PNG_INTERNAL_FUNCTION(int,png_check_fp_string,(png_const_charp string, + png_size_t size),PNG_EMPTY); #endif /* pCAL || sCAL */ #if defined(PNG_READ_GAMMA_SUPPORTED) ||\ defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED) @@ -1620,31 +1716,33 @@ * if there is an overflow. The result is a boolean - false (0) * for overflow, true (1) if no overflow, in which case *res * holds the result. */ -PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a, - png_int_32 multiplied_by, png_int_32 divided_by)); +PNG_INTERNAL_FUNCTION(int,png_muldiv,(png_fixed_point_p res, png_fixed_point a, + png_int_32 multiplied_by, png_int_32 divided_by),PNG_EMPTY); #endif #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) /* Same deal, but issue a warning on overflow and return 0. */ -PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr, - png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by)); +PNG_INTERNAL_FUNCTION(png_fixed_point,png_muldiv_warn, + (png_const_structrp png_ptr, png_fixed_point a, png_int_32 multiplied_by, + png_int_32 divided_by),PNG_EMPTY); #endif #ifdef PNG_READ_GAMMA_SUPPORTED /* Calculate a reciprocal - used for gamma values. This returns * 0 if the argument is 0 in order to maintain an undefined value, * there are no warnings. */ -PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a)); +PNG_INTERNAL_FUNCTION(png_fixed_point,png_reciprocal,(png_fixed_point a), + PNG_EMPTY); /* The same but gives a reciprocal of the product of two fixed point * values. Accuracy is suitable for gamma calculations but this is * not exact - use png_muldiv for that. */ -PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a, - png_fixed_point b)); +PNG_INTERNAL_FUNCTION(png_fixed_point,png_reciprocal2,(png_fixed_point a, + png_fixed_point b),PNG_EMPTY); #endif #ifdef PNG_READ_GAMMA_SUPPORTED /* Internal fixed point gamma correction. These APIs are called as @@ -1653,20 +1751,73 @@ * * While the input is an 'unsigned' value it must actually be the * correct bit value - 0..255 or 0..65535 as required. */ -PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr, - unsigned int value, png_fixed_point gamma_value)); -PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value)); -PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value, - png_fixed_point gamma_value)); -PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value, - png_fixed_point gamma_value)); -PNG_EXTERN void png_destroy_gamma_table(png_structp png_ptr); -PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, - int bit_depth)); +PNG_INTERNAL_FUNCTION(png_uint_16,png_gamma_correct,(png_structrp png_ptr, + unsigned int value, png_fixed_point gamma_value),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(int,png_gamma_significant,(png_fixed_point gamma_value), + PNG_EMPTY); +PNG_INTERNAL_FUNCTION(png_uint_16,png_gamma_16bit_correct,(unsigned int value, + png_fixed_point gamma_value),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(png_byte,png_gamma_8bit_correct,(unsigned int value, + png_fixed_point gamma_value),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_destroy_gamma_table,(png_structrp png_ptr), + PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_build_gamma_table,(png_structrp png_ptr, + int bit_depth),PNG_EMPTY); +#endif + +/* SIMPLIFIED READ/WRITE SUPPORT */ +#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ + defined PNG_SIMPLIFIED_WRITE_SUPPORTED +/* The internal structure that png_image::opaque points to. */ +typedef struct png_control +{ + png_structp png_ptr; + png_infop info_ptr; + png_voidp error_buf; /* Always a jmp_buf at present. */ + + png_const_bytep memory; /* Memory buffer. */ + png_size_t size; /* Size of the memory buffer. */ + + unsigned int for_write :1; /* Otherwise it is a read structure */ + unsigned int owned_file :1; /* We own the file in io_ptr */ +} png_control; + +/* Return the pointer to the jmp_buf from a png_control: necessary because C + * does not reveal the type of the elements of jmp_buf. + */ +#ifdef __cplusplus +# define png_control_jmp_buf(pc) (((jmp_buf*)((pc)->error_buf))[0]) +#else +# define png_control_jmp_buf(pc) ((pc)->error_buf) #endif +/* Utility to safely execute a piece of libpng code catching and logging any + * errors that might occur. Returns true on success, false on failure (either + * of the function or as a result of a png_error.) + */ +PNG_INTERNAL_FUNCTION(void,png_safe_error,(png_structp png_ptr, + png_const_charp error_message),PNG_NORETURN); + +#ifdef PNG_WARNINGS_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_safe_warning,(png_structp png_ptr, + png_const_charp warning_message),PNG_EMPTY); +#else +# define png_safe_warning 0/*dummy argument*/ +#endif + +PNG_INTERNAL_FUNCTION(int,png_safe_execute,(png_imagep image, + int (*function)(png_voidp), png_voidp arg),PNG_EMPTY); + +/* Utility to log an error, this also cleans up the png_image, the function + * always returns 0 (false). + */ +PNG_INTERNAL_FUNCTION(int,png_image_error,(png_imagep image, + png_const_charp error_message),PNG_EMPTY); + +#endif /* SIMPLIFIED READ/WRITE */ + /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ #include "pngdebug.h" diff -ru4NwbB libpng-1.5.10/pngread.c libpng-1.6.0beta22/pngread.c --- libpng-1.5.10/pngread.c 2012-03-29 00:06:54.575981702 -0500 +++ libpng-1.6.0beta22/pngread.c 2012-05-23 12:30:56.146746457 -0500 @@ -1,8 +1,8 @@ /* pngread.c - read a PNG file * - * Last changed in libpng 1.5.10 [March 8, 2012] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -14,20 +14,25 @@ * read a PNG file or stream. */ #include "pngpriv.h" +#if defined PNG_SIMPLIFIED_READ_SUPPORTED && defined PNG_STDIO_SUPPORTED +# include +#endif #ifdef PNG_READ_SUPPORTED /* Create a PNG structure for reading, and allocate any memory needed. */ PNG_FUNCTION(png_structp,PNGAPI png_create_read_struct,(png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) { - -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); +#ifndef PNG_USER_MEM_SUPPORTED + png_structp png_ptr = png_create_png_struct(user_png_ver, error_ptr, + error_fn, warn_fn, NULL, NULL, NULL); +#else + return png_create_read_struct_2(user_png_ver, error_ptr, error_fn, + warn_fn, NULL, NULL, NULL); } /* Alternate create PNG structure for reading, and allocate any memory * needed. @@ -36,133 +41,42 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) { + png_structp png_ptr = png_create_png_struct(user_png_ver, error_ptr, + error_fn, warn_fn, mem_ptr, malloc_fn, free_fn); #endif /* PNG_USER_MEM_SUPPORTED */ -#ifdef PNG_SETJMP_SUPPORTED - volatile -#endif - png_structp png_ptr; - volatile int png_cleanup_needed = 0; - -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf tmp_jmpbuf; -#endif -#endif - - png_debug(1, "in png_create_read_struct"); + if (png_ptr != NULL) + { + png_ptr->mode = PNG_IS_READ_STRUCT; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - malloc_fn, mem_ptr); -#else - png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); + /* Added in libpng-1.6.0; this can be used to detect a read structure if + * required (it will be zero in a write structure.) + */ +# ifdef PNG_SEQUENTIAL_READ_SUPPORTED + png_ptr->IDAT_read_size = PNG_IDAT_READ_SIZE; #endif - if (png_ptr == NULL) - return (NULL); - - /* Added at libpng-1.2.6 */ -#ifdef PNG_USER_LIMITS_SUPPORTED - png_ptr->user_width_max = PNG_USER_WIDTH_MAX; - png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; - - /* Added at libpng-1.2.43 and 1.4.0 */ - png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; - /* Added at libpng-1.2.43 and 1.4.1 */ - png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; -#endif +# ifdef PNG_BENIGN_READ_ERRORS_SUPPORTED + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; -#ifdef PNG_SETJMP_SUPPORTED -/* Applications that neglect to set up their own setjmp() and then - * encounter a png_error() will longjmp here. Since the jmpbuf is - * then meaningless we abort instead of returning. + /* In stable builds only warn if an application error can be completely + * handled. */ -#ifdef USE_FAR_KEYWORD - if (setjmp(tmp_jmpbuf)) -#else - if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */ -#endif - PNG_ABORT(); -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); -#endif -#endif /* PNG_SETJMP_SUPPORTED */ - -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); +# if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC + png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN; #endif - - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - /* Call the general version checker (shared with read and write code): */ - if (!png_user_version_check(png_ptr, user_png_ver)) - png_cleanup_needed = 1; - - if (!png_cleanup_needed) - { - /* Initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size); - - if (png_ptr->zbuf == NULL) - png_cleanup_needed = 1; - } - - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - - if (!png_cleanup_needed) - { - switch (inflateInit(&png_ptr->zstream)) - { - case Z_OK: - break; /* Do nothing */ - - case Z_MEM_ERROR: - png_warning(png_ptr, "zlib memory error"); - png_cleanup_needed = 1; - break; - - case Z_STREAM_ERROR: - png_warning(png_ptr, "zlib stream error"); - png_cleanup_needed = 1; - break; - - case Z_VERSION_ERROR: - png_warning(png_ptr, "zlib version error"); - png_cleanup_needed = 1; - break; - - default: png_warning(png_ptr, "Unknown zlib error"); - png_cleanup_needed = 1; - } - } - - if (png_cleanup_needed) - { - /* Clean up PNG structure and deallocate any memory. */ - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, - (png_free_ptr)free_fn, (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); #endif - return (NULL); - } - - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; + /* TODO: delay this, it can be done in png_init_io (if the app doesn't + * do it itself) avoiding setting the default function if it is not + * required. + */ png_set_read_fn(png_ptr, NULL, NULL); + } - - return (png_ptr); + return png_ptr; } #ifdef PNG_SEQUENTIAL_READ_SUPPORTED @@ -174,9 +88,9 @@ * here. The application can then have access to the signature bytes we * read if it is determined that this isn't a valid PNG file. */ void PNGAPI -png_read_info(png_structp png_ptr, png_infop info_ptr) +png_read_info(png_structrp png_ptr, png_inforp info_ptr) { png_debug(1, "in png_read_info"); if (png_ptr == NULL || info_ptr == NULL) @@ -337,15 +251,16 @@ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ /* Optional call to update the users info_ptr structure */ void PNGAPI -png_read_update_info(png_structp png_ptr, png_infop info_ptr) +png_read_update_info(png_structrp png_ptr, png_inforp info_ptr) { png_debug(1, "in png_read_update_info"); - if (png_ptr == NULL) - return; - + if (png_ptr != NULL) + { + if ((png_ptr->flags & PNG_FLAG_ROW_INIT) == 0) + { png_read_start_row(png_ptr); #ifdef PNG_READ_TRANSFORMS_SUPPORTED png_read_transform_info(png_ptr, info_ptr); @@ -353,30 +268,43 @@ PNG_UNUSED(info_ptr) #endif } + /* New in 1.6.0 this avoids the bug of doing the initializations twice */ + else + png_app_error(png_ptr, + "png_read_update_info/png_start_read_image: duplicate call"); + } +} + #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Initialize palette, background, etc, after transformations * are set, but before any reading takes place. This allows * the user to obtain a gamma-corrected palette, for example. * If the user doesn't call this, we will do it ourselves. */ void PNGAPI -png_start_read_image(png_structp png_ptr) +png_start_read_image(png_structrp png_ptr) { png_debug(1, "in png_start_read_image"); if (png_ptr != NULL) + { + if ((png_ptr->flags & PNG_FLAG_ROW_INIT) == 0) png_read_start_row(png_ptr); + + /* New in 1.6.0 this avoids the bug of doing the initializations twice */ + else + png_app_error(png_ptr, + "png_start_read_image/png_read_update_info: duplicate call"); + } } #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ #ifdef PNG_SEQUENTIAL_READ_SUPPORTED void PNGAPI -png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) +png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row) { - int ret; - png_row_info row_info; if (png_ptr == NULL) return; @@ -527,51 +456,10 @@ if (!(png_ptr->mode & PNG_HAVE_IDAT)) png_error(png_ptr, "Invalid attempt to read row data"); - png_ptr->zstream.next_out = png_ptr->row_buf; - png_ptr->zstream.avail_out = - (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth, - png_ptr->iwidth) + 1); - - do - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_crc_finish(png_ptr, 0); - - png_ptr->idat_size = png_read_chunk_header(png_ptr); - if (png_ptr->chunk_name != png_IDAT) - png_error(png_ptr, "Not enough image data"); - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - png_crc_read(png_ptr, png_ptr->zbuf, - (png_size_t)png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - - if (ret == Z_STREAM_END) - { - if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_benign_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression error"); - - } while (png_ptr->zstream.avail_out); + /* Fill the row with IDAT data: */ + png_read_IDAT_data(png_ptr, png_ptr->row_buf, row_info.rowbytes + 1); if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE) { if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST) @@ -671,9 +560,9 @@ * [*] png_handle_alpha() does not exist yet, as of this version of libpng */ void PNGAPI -png_read_rows(png_structp png_ptr, png_bytepp row, +png_read_rows(png_structrp png_ptr, png_bytepp row, png_bytepp display_row, png_uint_32 num_rows) { png_uint_32 i; png_bytepp rp; @@ -726,9 +615,9 @@ * * [*] png_handle_alpha() does not exist yet, as of this version of libpng */ void PNGAPI -png_read_image(png_structp png_ptr, png_bytepp image) +png_read_image(png_structrp png_ptr, png_bytepp image) { png_uint_32 i, image_height; int pass, j; png_bytepp rp; @@ -791,16 +680,19 @@ * file, will verify the end is accurate, and will read any comments * or time information at the end of the file, if info is not NULL. */ void PNGAPI -png_read_end(png_structp png_ptr, png_infop info_ptr) +png_read_end(png_structrp png_ptr, png_inforp info_ptr) { png_debug(1, "in png_read_end"); if (png_ptr == NULL) return; - png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ + /* If png_read_end is called in the middle of reading the rows there may + * still be pending IDAT data and an owned zstream. Deal with this here. + */ + png_read_finish_IDAT(png_ptr); #ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED /* Report invalid palette index; added at libng-1.5.10 */ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && @@ -937,114 +829,21 @@ } while (!(png_ptr->mode & PNG_HAVE_IEND)); } #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ -/* Free all memory used by the read */ -void PNGAPI -png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, - png_infopp end_info_ptr_ptr) -{ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL, end_info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; - png_voidp mem_ptr = NULL; -#endif - - png_debug(1, "in png_destroy_read_struct"); - - if (png_ptr_ptr != NULL) - png_ptr = *png_ptr_ptr; - if (png_ptr == NULL) - return; - -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; - mem_ptr = png_ptr->mem_ptr; -#endif - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (end_info_ptr_ptr != NULL) - end_info_ptr = *end_info_ptr_ptr; - - png_read_destroy(png_ptr, info_ptr, end_info_ptr); - - if (info_ptr != NULL) - { -#ifdef PNG_TEXT_SUPPORTED - png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1); -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = NULL; - } - - if (end_info_ptr != NULL) - { -#ifdef PNG_READ_TEXT_SUPPORTED - png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1); -#endif -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)end_info_ptr); -#endif - *end_info_ptr_ptr = NULL; - } - - if (png_ptr != NULL) +/* Free all memory used in the read struct */ +static void +png_read_destroy(png_structrp png_ptr) { -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = NULL; - } -} - -/* Free all memory used by the read (old method) */ -void /* PRIVATE */ -png_read_destroy(png_structp png_ptr, png_infop info_ptr, - png_infop end_info_ptr) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; -#endif - png_error_ptr error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_error_ptr warning_fn; -#endif - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - png_debug(1, "in png_read_destroy"); - if (info_ptr != NULL) - png_info_destroy(png_ptr, info_ptr); - - if (end_info_ptr != NULL) - png_info_destroy(png_ptr, end_info_ptr); - #ifdef PNG_READ_GAMMA_SUPPORTED png_destroy_gamma_table(png_ptr); #endif - png_free(png_ptr, png_ptr->zbuf); png_free(png_ptr, png_ptr->big_row_buf); png_free(png_ptr, png_ptr->big_prev_row); - png_free(png_ptr, png_ptr->chunkdata); + png_free(png_ptr, png_ptr->read_buffer); #ifdef PNG_READ_QUANTIZE_SUPPORTED png_free(png_ptr, png_ptr->palette_lookup); png_free(png_ptr, png_ptr->quantize_index); @@ -1060,55 +859,57 @@ png_free(png_ptr, png_ptr->trans_alpha); png_ptr->free_me &= ~PNG_FREE_TRNS; #endif -#ifdef PNG_READ_hIST_SUPPORTED - if (png_ptr->free_me & PNG_FREE_HIST) - png_free(png_ptr, png_ptr->hist); - png_ptr->free_me &= ~PNG_FREE_HIST; -#endif - inflateEnd(&png_ptr->zstream); #ifdef PNG_PROGRESSIVE_READ_SUPPORTED png_free(png_ptr, png_ptr->save_buffer); #endif - /* Save the important info out of the png_struct, in case it is - * being used again. - */ -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED + png_free(png_ptr, png_ptr->unknown_chunk.data); #endif - error_fn = png_ptr->error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - warning_fn = png_ptr->warning_fn; -#endif - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + png_free(png_ptr, png_ptr->chunk_list); #endif - png_memset(png_ptr, 0, png_sizeof(png_struct)); + /* NOTE: the 'setjmp' buffer may still be allocated and the memory and error + * callbacks are still set at this point. They are required to complete the + * destruction of the png_struct itself. + */ +} - png_ptr->error_fn = error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_ptr->warning_fn = warning_fn; -#endif - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif +/* Free all memory used by the read */ +void PNGAPI +png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, + png_infopp end_info_ptr_ptr) +{ + png_structrp png_ptr = NULL; -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); -#endif + png_debug(1, "in png_destroy_read_struct"); + + if (png_ptr_ptr != NULL) + png_ptr = *png_ptr_ptr; + + if (png_ptr == NULL) + return; + + /* libpng 1.6.0: use the API to destroy info structs to ensure consistent + * behavior. Prior to 1.6.0 libpng did extra 'info' destruction in this API. + * The extra was, apparently, unnecessary yet this hides memory leak bugs. + */ + png_destroy_info_struct(png_ptr, end_info_ptr_ptr); + png_destroy_info_struct(png_ptr, info_ptr_ptr); + *png_ptr_ptr = NULL; + png_read_destroy(png_ptr); + png_destroy_png_struct(png_ptr); } void PNGAPI -png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn) +png_set_read_status_fn(png_structrp png_ptr, png_read_status_ptr read_row_fn) { if (png_ptr == NULL) return; @@ -1118,9 +919,9 @@ #ifdef PNG_SEQUENTIAL_READ_SUPPORTED #ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI -png_read_png(png_structp png_ptr, png_infop info_ptr, +png_read_png(png_structrp png_ptr, png_inforp info_ptr, int transforms, voidp params) { int row; @@ -1301,5 +1102,2852 @@ } #endif /* PNG_INFO_IMAGE_SUPPORTED */ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +/* SIMPLIFIED READ + * + * This code currently relies on the sequential reader, though it could easily + * be made to work with the progressive one. + */ +/* Arguments to png_image_finish_read: */ + +/* Encoding of PNG data (used by the color-map code) */ +/* TODO: change these, dang, ANSI-C reserves the 'E' namespace. */ +# define E_NOTSET 0 /* File encoding not yet known */ +# define E_sRGB 1 /* 8-bit encoded to sRGB gamma */ +# define E_LINEAR 2 /* 16-bit linear: not encoded, NOT pre-multiplied! */ +# define E_FILE 3 /* 8-bit encoded to file gamma, not sRGB or linear */ +# define E_LINEAR8 4 /* 8-bit linear: only from a file value */ + +/* Color-map processing: after libpng has run on the PNG image further + * processing may be needed to conver the data to color-map indicies. + */ +#define PNG_CMAP_NONE 0 +#define PNG_CMAP_GA 1 /* Process GA data to a color-map with alpha */ +#define PNG_CMAP_TRANS 2 /* Process GA data to a background index */ +#define PNG_CMAP_RGB 3 /* Process RGB data */ +#define PNG_CMAP_RGB_ALPHA 4 /* Process RGBA data */ + +/* The following document where the background is for each processing case. */ +#define PNG_CMAP_NONE_BACKGROUND 256 +#define PNG_CMAP_GA_BACKGROUND 231 +#define PNG_CMAP_TRANS_BACKGROUND 254 +#define PNG_CMAP_RGB_BACKGROUND 256 +#define PNG_CMAP_RGB_ALPHA_BACKGROUND 216 + +typedef struct +{ + /* Arguments: */ + png_imagep image; + png_voidp buffer; + png_int_32 row_stride; + png_voidp colormap; + png_const_colorp background; + /* Local variables: */ + png_voidp local_row; + png_voidp first_row; + ptrdiff_t row_bytes; /* step between rows */ + int file_encoding; /* E_ values above */ + png_fixed_point gamma_to_linear; /* For E_FILE, reciprocal of gamma */ + int colormap_processing; /* PNG_CMAP_ values above */ +} png_image_read_control; + +/* Do all the *safe* initialization - 'safe' means that png_error won't be + * called, so setting up the jmp_buf is not required. This means that anything + * called from here must *not* call png_malloc - it has to call png_malloc_warn + * instead so that control is returned safely back to this routine. + */ +static int +png_image_read_init(png_imagep image) +{ + if (image->opaque == NULL) + { + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, image, + png_safe_error, png_safe_warning); + + /* And set the rest of the structure to NULL to ensure that the various + * fields are consistent. + */ + memset(image, 0, sizeof *image); + image->version = PNG_IMAGE_VERSION; + + if (png_ptr != NULL) + { + png_infop info_ptr = png_create_info_struct(png_ptr); + + if (info_ptr != NULL) + { + png_controlp control = png_voidcast(png_controlp, + png_malloc_warn(png_ptr, sizeof *control)); + + if (control != NULL) + { + png_memset(control, 0, sizeof *control); + + control->png_ptr = png_ptr; + control->info_ptr = info_ptr; + control->for_write = 0; + + image->opaque = control; + return 1; + } + + /* Error clean up */ + png_destroy_info_struct(png_ptr, &info_ptr); + } + + png_destroy_read_struct(&png_ptr, NULL, NULL); + } + + return png_image_error(image, "png_image_read: out of memory"); + } + + return png_image_error(image, "png_image_read: opaque pointer not NULL"); +} + +/* Utility to find the base format of a PNG file from a png_struct. */ +static png_uint_32 +png_image_format(png_structrp png_ptr) +{ + png_uint_32 format = 0; + + if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) + format |= PNG_FORMAT_FLAG_COLOR; + + if (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) + format |= PNG_FORMAT_FLAG_ALPHA; + + /* Use png_ptr here, not info_ptr, because by examination png_handle_tRNS + * sets the png_struct fields; that's all we are interested in here. The + * precise interaction with an app call to png_set_tRNS and PNG file reading + * is unclear. + */ + else if (png_ptr->num_trans > 0) + format |= PNG_FORMAT_FLAG_ALPHA; + + if (png_ptr->bit_depth == 16) + format |= PNG_FORMAT_FLAG_LINEAR; + + if (png_ptr->color_type & PNG_COLOR_MASK_PALETTE) + format |= PNG_FORMAT_FLAG_COLORMAP; + + return format; +} + +/* Is the given gamma significantly different from sRGB? The test is the same + * one used in pngrtran.c when deciding whether to do gamma correction. The + * arithmetic optimizes the division by using the fact that the inverse of the + * file sRGB gamma is 2.2 + */ +static int +png_gamma_not_sRGB(png_fixed_point g) +{ + if (g < PNG_FP_1) + { + /* An uninitialized gamma is assumed to be sRGB for the simplified API. */ + if (g == 0) + return 0; + + return png_gamma_significant((g * 11 + 2)/5 /* i.e. *2.2, rounded */); + } + + return 1; +} + +/* Do the main body of a 'png_image_begin_read' function; read the PNG file + * header and fill in all the information. This is executed in a safe context, + * unlike the init routine above. + */ +static int +png_image_read_header(png_voidp argument) +{ + png_imagep image = png_voidcast(png_imagep, argument); + png_structrp png_ptr = image->opaque->png_ptr; + png_inforp info_ptr = image->opaque->info_ptr; + + png_set_benign_errors(png_ptr, 1/*warn*/); + png_read_info(png_ptr, info_ptr); + + /* Do this the fast way; just read directly out of png_struct. */ + image->width = png_ptr->width; + image->height = png_ptr->height; + + { + png_uint_32 format = png_image_format(png_ptr); + + image->format = format; + +#ifdef PNG_COLORSPACE_SUPPORTED + /* Does the colorspace match sRGB? If there is no color endpoint + * (colorant) information assume yes, otherwise require the + * 'ENDPOINTS_MATCHE_sRGB' colorspace flag to have been set. If the + * colorspace has been determined to be invalid ignore it. + */ + if ((format & PNG_FORMAT_FLAG_COLOR) != 0 && ((png_ptr->colorspace.flags + & (PNG_COLORSPACE_HAVE_ENDPOINTS|PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB| + PNG_COLORSPACE_INVALID)) == PNG_COLORSPACE_HAVE_ENDPOINTS)) + image->flags |= PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB; +#endif + } + + /* We need the maximum number of entries regardless of the format the + * application sets here. + */ + { + png_uint_32 cmap_entries; + + switch (png_ptr->color_type) + { + case PNG_COLOR_TYPE_GRAY: + cmap_entries = 1U << png_ptr->bit_depth; + break; + + case PNG_COLOR_TYPE_PALETTE: + cmap_entries = png_ptr->num_palette; + break; + + default: + cmap_entries = 256; + break; + } + + if (cmap_entries > 256) + cmap_entries = 256; + + image->colormap_entries = cmap_entries; + } + + return 1; +} + +#ifdef PNG_STDIO_SUPPORTED +int PNGAPI +png_image_begin_read_from_stdio(png_imagep image, FILE* file) +{ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (file != NULL) + { + if (png_image_read_init(image)) + { + /* This is slightly evil, but png_init_io doesn't do anything other + * than this and we haven't changed the standard IO functions so + * this saves a 'safe' function. + */ + image->opaque->png_ptr->io_ptr = file; + return png_safe_execute(image, png_image_read_header, image); + } + } + + else + return png_image_error(image, + "png_image_begin_read_from_stdio: invalid argument"); + } + + return 0; +} + +int PNGAPI +png_image_begin_read_from_file(png_imagep image, const char *file_name) +{ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (file_name != NULL) + { + FILE *fp = fopen(file_name, "rb"); + + if (fp != NULL) + { + if (png_image_read_init(image)) + { + image->opaque->png_ptr->io_ptr = fp; + image->opaque->owned_file = 1; + return png_safe_execute(image, png_image_read_header, image); + } + + /* Clean up: just the opened file. */ + (void)fclose(fp); + } + + else + return png_image_error(image, strerror(errno)); + } + + else + return png_image_error(image, + "png_image_begin_read_from_file: invalid argument"); + } + + return 0; +} +#endif /* PNG_STDIO_SUPPORTED */ + +static void PNGCBAPI +png_image_memory_read(png_structp png_ptr, png_bytep out, png_size_t need) +{ + if (png_ptr != NULL) + { + png_imagep image = png_voidcast(png_imagep, png_ptr->io_ptr); + if (image != NULL) + { + png_controlp cp = image->opaque; + if (cp != NULL) + { + png_const_bytep memory = cp->memory; + png_size_t size = cp->size; + + if (memory != NULL && size >= need) + { + png_memcpy(out, memory, need); + cp->memory = memory + need; + cp->size = size - need; + return; + } + + png_error(png_ptr, "read beyond end of data"); + } + } + + png_error(png_ptr, "invalid memory read"); + } +} + +int PNGAPI png_image_begin_read_from_memory(png_imagep image, + png_const_voidp memory, png_size_t size) +{ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (memory != NULL && size > 0) + { + if (png_image_read_init(image)) + { + /* Now set the IO functions to read from the memory buffer and + * store it into io_ptr. Again do this in-place to avoid calling a + * libpng function that requires error handling. + */ + image->opaque->memory = png_voidcast(png_const_bytep, memory); + image->opaque->size = size; + image->opaque->png_ptr->io_ptr = image; + image->opaque->png_ptr->read_data_fn = png_image_memory_read; + + return png_safe_execute(image, png_image_read_header, image); + } + } + + else + return png_image_error(image, + "png_image_begin_read_from_memory: invalid argument"); + } + + return 0; +} + +/* Utility function to skip chunks that are not used by the simplified image + * read functions and an appropriate macro to call it. + */ +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +static void +png_image_skip_unused_chunks(png_structrp png_ptr) +{ + /* Prepare the reader to ignore all recognized chunks whose data will not + * be used, i.e., all chunks recognized by libpng except for those + * involved in basic image reading: + * + * IHDR, PLTE, IDAT, IEND + * + * Or image data handling: + * + * tRNS, bKGD, gAMA, cHRM, sRGB, iCCP and sBIT. + * + * This provides a small performance improvement and eliminates any + * potential vulnerability to security problems in the unused chunks. + * + * TODO: make it so that this is an explicit list to process, not a list + * to ignore? + */ + { + static PNG_CONST png_byte chunks_to_ignore[] = { + 104, 73, 83, 84, '\0', /* hIST */ + 105, 84, 88, 116, '\0', /* iTXt */ + 111, 70, 70, 115, '\0', /* oFFs */ + 112, 67, 65, 76, '\0', /* pCAL */ + 112, 72, 89, 115, '\0', /* pHYs */ + 115, 67, 65, 76, '\0', /* sCAL */ + 115, 80, 76, 84, '\0', /* sPLT */ + 116, 69, 88, 116, '\0', /* tEXt */ + 116, 73, 77, 69, '\0', /* tIME */ + 122, 84, 88, 116, '\0' /* zTXt */ + }; + + /* Ignore unknown chunks */ + png_set_keep_unknown_chunks(png_ptr, 1 /* PNG_HANDLE_CHUNK_NEVER */, + NULL, 0); + + /* Ignore known but unused chunks */ + png_set_keep_unknown_chunks(png_ptr, 1 /* PNG_HANDLE_CHUNK_NEVER */, + chunks_to_ignore, (sizeof chunks_to_ignore)/5); + } +} + +# define PNG_SKIP_CHUNKS(p) png_image_skip_unused_chunks(p) +#else +# define PNG_SKIP_CHUNKS(p) ((void)0) +#endif /* PNG_HANDLE_AS_UNKNOWN_SUPPORTED */ + +/* The following macro gives the exact rounded answer for all values in the + * range 0..255 (it actually divides by 51.2, but the rounding still generates + * the correct numbers 0..5 + */ +#define PNG_DIV51(v8) (((v8) * 5 + 130) >> 8) + +/* Utility functions to make particular color-maps */ +static void +set_file_encoding(png_image_read_control *display) +{ + png_fixed_point g = display->image->opaque->png_ptr->colorspace.gamma; + if (png_gamma_significant(g)) + { + if (png_gamma_not_sRGB(g)) + { + display->file_encoding = E_FILE; + display->gamma_to_linear = png_reciprocal(g); + } + + else + display->file_encoding = E_sRGB; + } + + else + display->file_encoding = E_LINEAR8; +} + +static unsigned int +decode_gamma(png_image_read_control *display, png_uint_32 value, int encoding) +{ + if (encoding == E_FILE) /* double check */ + encoding = display->file_encoding; + + if (encoding == E_NOTSET) /* must be the file encoding */ + { + set_file_encoding(display); + encoding = display->file_encoding; + } + + switch (encoding) + { + case E_FILE: + value = png_gamma_16bit_correct(value*257, display->gamma_to_linear); + break; + + case E_sRGB: + value = png_sRGB_table[value]; + break; + + case E_LINEAR: + break; + + case E_LINEAR8: + value *= 257; + break; + + default: + png_error(display->image->opaque->png_ptr, + "unexpected encoding (internal error)"); + break; + } + + return value; +} + +static png_uint_32 +png_colormap_compose(png_image_read_control *display, + png_uint_32 foreground, int foreground_encoding, png_uint_32 alpha, + png_uint_32 background, int encoding) +{ + /* The file value is composed on the background, the background has the given + * encoding and so does the result, the file is encoded with E_FILE and the + * file and alpha are 8-bit values. The (output) encoding will always be + * E_LINEAR or E_sRGB. + */ + png_uint_32 f = decode_gamma(display, foreground, foreground_encoding); + png_uint_32 b = decode_gamma(display, background, encoding); + + /* The alpha is always an 8-bit value (it comes from the palette), the value + * scaled by 255 is what PNG_sRGB_FROM_LINEAR requires. + */ + f = f * alpha + b * (255-alpha); + + if (encoding == E_LINEAR) + { + /* Scale to 65535; divide by 255, approximately (in fact this is extremely + * accurate, it divides by 255.00000005937181414556, with no overflow.) + */ + f *= 257; /* Now scaled by 65535 */ + f += f >> 16; + f = (f+32768) >> 16; + } + + else /* E_sRGB */ + f = PNG_sRGB_FROM_LINEAR(f); + + return f; +} + +/* NOTE: E_LINEAR values to this routine must be 16-bit, but E_FILE values must + * be 8-bit. + */ +static void +png_create_colormap_entry(png_image_read_control *display, + png_uint_32 ip, png_uint_32 red, png_uint_32 green, png_uint_32 blue, + png_uint_32 alpha, int encoding) +{ + png_imagep image = display->image; + const int output_encoding = (image->format & PNG_FORMAT_FLAG_LINEAR) ? + E_LINEAR : E_sRGB; + const int convert_to_Y = (image->format & PNG_FORMAT_FLAG_COLOR) == 0 && + (red != green || green != blue); + + if (ip > 255) + png_error(image->opaque->png_ptr, "color-map index out of range"); + + /* Update the cache with whether the file gamma is significantly different + * from sRGB. + */ + if (encoding == E_FILE) + { + if (display->file_encoding == E_NOTSET) + set_file_encoding(display); + + /* Note that the cached value may be E_FILE too, but if it is then the + * gamma_to_linear member has been set. + */ + encoding = display->file_encoding; + } + + if (encoding == E_FILE) + { + png_fixed_point g = display->gamma_to_linear; + + red = png_gamma_16bit_correct(red*257, g); + green = png_gamma_16bit_correct(green*257, g); + blue = png_gamma_16bit_correct(blue*257, g); + + if (convert_to_Y || output_encoding == E_LINEAR) + { + alpha *= 257; + encoding = E_LINEAR; + } + + else + { + red = PNG_sRGB_FROM_LINEAR(red * 255); + green = PNG_sRGB_FROM_LINEAR(green * 255); + blue = PNG_sRGB_FROM_LINEAR(blue * 255); + encoding = E_sRGB; + } + } + + else if (encoding == E_LINEAR8) + { + /* This encoding occurs quite frequently in test cases because PngSuite + * includes a gAMA 1.0 chunk with most images. + */ + red *= 257; + green *= 257; + blue *= 257; + alpha *= 257; + encoding = E_LINEAR; + } + + else if (encoding == E_sRGB && (convert_to_Y || output_encoding == E_LINEAR)) + { + /* The values are 8-bit sRGB values, but must be converted to 16-bit + * linear. + */ + red = png_sRGB_table[red]; + green = png_sRGB_table[green]; + blue = png_sRGB_table[blue]; + alpha *= 257; + encoding = E_LINEAR; + } + + /* This is set if the color isn't gray but the output is. */ + if (encoding == E_LINEAR) + { + if (convert_to_Y) + { + /* NOTE: these values are copied from png_do_rgb_to_gray */ + png_uint_32 y = (png_uint_32)6968 * red + (png_uint_32)23434 * green + + (png_uint_32)2366 * blue; + + if (output_encoding == E_LINEAR) + y = (y + 16384) >> 15; + + else + { + /* y is scaled by 32768, we need it scaled by 255: */ + y = (y + 128) >> 8; + y *= 255; + y = PNG_sRGB_FROM_LINEAR((y + 64) >> 7); + encoding = E_sRGB; + } + + blue = red = green = y; + } + + else if (output_encoding == E_sRGB) + { + red = PNG_sRGB_FROM_LINEAR(red * 255); + green = PNG_sRGB_FROM_LINEAR(green * 255); + blue = PNG_sRGB_FROM_LINEAR(blue * 255); + alpha = PNG_DIV257(alpha); + encoding = E_sRGB; + } + } + + if (encoding != output_encoding) + png_error(image->opaque->png_ptr, "bad encoding (internal error)"); + + /* Store the value. */ + { +# ifdef PNG_FORMAT_BGR_SUPPORTED + const int afirst = (image->format & PNG_FORMAT_FLAG_AFIRST) != 0 && + (image->format & PNG_FORMAT_FLAG_ALPHA) != 0; +# else +# define afirst 0 +# endif +# ifdef PNG_FORMAT_BGR_SUPPORTED + const int bgr = (image->format & PNG_FORMAT_FLAG_BGR) ? 2 : 0; +# else +# define bgr 0 +# endif + + if (output_encoding == E_LINEAR) + { + png_uint_16p entry = png_voidcast(png_uint_16p, display->colormap); + + entry += ip * PNG_IMAGE_SAMPLE_CHANNELS(image->format); + + /* The linear 16-bit values must be pre-multiplied by the alpha channel + * value, if less than 65535 (this is, effectively, composite on black + * if the alpha channel is removed.) + */ + switch (PNG_IMAGE_SAMPLE_CHANNELS(image->format)) + { + case 4: + entry[afirst ? 0 : 3] = (png_uint_16)alpha; + /* FALL THROUGH */ + + case 3: + if (alpha < 65535) + { + if (alpha > 0) + { + blue = (blue * alpha + 32767U)/65535U; + green = (green * alpha + 32767U)/65535U; + red = (red * alpha + 32767U)/65535U; + } + + else + red = green = blue = 0; + } + entry[afirst + (2 ^ bgr)] = (png_uint_16)blue; + entry[afirst + 1] = (png_uint_16)green; + entry[afirst + bgr] = (png_uint_16)red; + break; + + case 2: + entry[1 ^ afirst] = (png_uint_16)alpha; + /* FALL THROUGH */ + + case 1: + if (alpha < 65535) + { + if (alpha > 0) + green = (green * alpha + 32767U)/65535U; + + else + green = 0; + } + entry[afirst] = (png_uint_16)green; + break; + + default: + break; + } + } + + else /* output encoding is E_sRGB */ + { + png_bytep entry = png_voidcast(png_bytep, display->colormap); + + entry += ip * PNG_IMAGE_SAMPLE_CHANNELS(image->format); + + switch (PNG_IMAGE_SAMPLE_CHANNELS(image->format)) + { + case 4: + entry[afirst ? 0 : 3] = (png_byte)alpha; + case 3: + entry[afirst + (2 ^ bgr)] = (png_byte)blue; + entry[afirst + 1] = (png_byte)green; + entry[afirst + bgr] = (png_byte)red; + break; + + case 2: + entry[1 ^ afirst] = (png_byte)alpha; + case 1: + entry[afirst] = (png_byte)green; + break; + + default: + break; + } + } + +# ifdef afirst +# undef afirst +# endif +# ifdef bgr +# undef bgr +# endif + } +} + +static int +make_gray_file_colormap(png_image_read_control *display) +{ + unsigned int i; + + for (i=0; i<256; ++i) + png_create_colormap_entry(display, i, i, i, i, 255, E_FILE); + + return i; +} + +static int +make_gray_colormap(png_image_read_control *display) +{ + unsigned int i; + + for (i=0; i<256; ++i) + png_create_colormap_entry(display, i, i, i, i, 255, E_sRGB); + + return i; +} +#define PNG_GRAY_COLORMAP_ENTRIES 256 + +static int +make_ga_colormap(png_image_read_control *display) +{ + unsigned int i, a; + + /* Alpha is retained, the output will be a color-map with entries + * selected by six levels of alpha. One transparent entry, 6 gray + * levels for all the intermediate alpha values, leaving 230 entries + * for the opaque grays. The color-map entries are the six values + * [0..5]*51, the GA processing uses PNG_DIV51(value) to find the + * relevant entry. + * + * if (alpha > 229) // opaque + * { + * // The 231 entries are selected to make the math below work: + * base = 0; + * entry = (231 * gray + 128) >> 8; + * } + * else if (alpha < 26) // transparent + * { + * base = 231; + * entry = 0; + * } + * else // partially opaque + * { + * base = 226 + 6 * PNG_DIV51(alpha); + * entry = PNG_DIV51(gray); + * } + */ + i = 0; + while (i < 231) + { + unsigned int gray = (i * 256 + 115) / 231; + png_create_colormap_entry(display, i++, gray, gray, gray, 255, E_sRGB); + } + + /* 255 is used here for the component values for consistency with the code + * that undoes premultiplication in pngwrite.c. + */ + png_create_colormap_entry(display, i++, 255, 255, 255, 0, E_sRGB); + + for (a=1; a<5; ++a) + { + unsigned int g; + + for (g=0; g<6; ++g) + png_create_colormap_entry(display, i++, g*51, g*51, g*51, a*51, + E_sRGB); + } + + return i; +} + +#define PNG_GA_COLORMAP_ENTRIES 256 + +static int +make_rgb_colormap(png_image_read_control *display) +{ + unsigned int i, r; + + /* Build a 6x6x6 opaque RGB cube */ + for (i=r=0; r<6; ++r) + { + unsigned int g; + + for (g=0; g<6; ++g) + { + unsigned int b; + + for (b=0; b<6; ++b) + png_create_colormap_entry(display, i++, r*51, g*51, b*51, 255, + E_sRGB); + } + } + + return i; +} + +#define PNG_RGB_COLORMAP_ENTRIES 216 + +/* Return a palette index to the above palette given three 8-bit sRGB values. */ +#define PNG_RGB_INDEX(r,g,b) \ + ((png_byte)(6 * (6 * PNG_DIV51(r) + PNG_DIV51(g)) + PNG_DIV51(b))) + +static int +png_image_read_colormap(png_voidp argument) +{ + png_image_read_control *display = + png_voidcast(png_image_read_control*, argument); + const png_imagep image = display->image; + + const png_structrp png_ptr = image->opaque->png_ptr; + const png_uint_32 output_format = image->format; + const int output_encoding = (output_format & PNG_FORMAT_FLAG_LINEAR) ? + E_LINEAR : E_sRGB; + + unsigned int cmap_entries; + unsigned int output_processing; /* Output processing option */ + unsigned int data_encoding = E_NOTSET; /* Encoding libpng must produce */ + + /* Background information; the background color and the index of this color + * in the color-map if it exists (else 256). + */ + unsigned int background_index = 256; + png_uint_32 back_r, back_g, back_b; + + /* Flags to accumulate things that need to be done to the input. */ + int expand_tRNS = 0; + + /* Exclude the NYI feature of compositing onto a color-mapped buffer; it is + * very difficult to do, the results look awful, and it is difficult to see + * what possible use it is because the application can't control the + * color-map. + */ + if (((png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0 || + png_ptr->num_trans > 0) /* alpha in input */ && + ((output_format & PNG_FORMAT_FLAG_ALPHA) == 0) /* no alpha in output */) + { + if (output_encoding == E_LINEAR) /* compose on black */ + back_b = back_g = back_r = 0; + + else if (display->background == NULL /* no way to remove it */) + png_error(png_ptr, + "a background color must be supplied to remove alpha/transparency"); + + /* Get a copy of the background color (this avoids repeating the checks + * below.) The encoding is 8-bit sRGB or 16-bit linear, depending on the + * output format. + */ + else + { + back_g = display->background->green; + if (output_format & PNG_FORMAT_FLAG_COLOR) + { + back_r = display->background->red; + back_b = display->background->blue; + } + else + back_b = back_r = back_g; + } + } + + else if (output_encoding == E_LINEAR) + back_b = back_r = back_g = 65535; + + else + back_b = back_r = back_g = 255; + + /* Decide what to do based on the PNG color type of the input data. The + * utility function png_create_colormap_entry deals with most aspects of the + * output transformations; this code works out how to produce bytes of + * color-map entries from the original format. + */ + switch (png_ptr->color_type) + { + case PNG_COLOR_TYPE_GRAY: + if (png_ptr->bit_depth <= 8) + { + /* There at most 256 colors in the output, regardless of + * transparency. + */ + unsigned int step, i, val, trans = 256/*ignore*/, back_alpha = 0; + + cmap_entries = 1U << png_ptr->bit_depth; + if (cmap_entries > image->colormap_entries) + png_error(png_ptr, "gray[8] color-map: too few entries"); + + step = 255 / (cmap_entries - 1); + output_processing = PNG_CMAP_NONE; + + /* If there is a tRNS chunk then this either selects a transparent + * value or, if the output has no alpha, the background color. + */ + if (png_ptr->num_trans > 0) + { + trans = png_ptr->trans_color.gray; + + if ((output_format & PNG_FORMAT_FLAG_ALPHA) == 0) + back_alpha = output_encoding == E_LINEAR ? 65535 : 255; + } + + /* png_create_colormap_entry just takes an RGBA and writes the + * corresponding color-map entry using the format from 'image', + * including the required convertion to sRGB or linear as + * appropriate. The input values are always either sRGB (if the + * gamma correction flag is 0) or 0..255 scaled file encoded values + * (if the function must gamma correct them). + */ + for (i=val=0; ibit_depth < 8) + png_set_packing(png_ptr); + } + + else /* bit depth is 16 */ + { + /* The 16-bit input values can be converted directly to 8-bit gamma + * encoded values; however, if a tRNS chunk is present 257 color-map + * entries are required. This means that the extra entry requires + * special processing; add an alpha channel, sacrifice gray level + * 254 and convert transparent (alpha==0) entries to that. + * + * Use libpng to chop the data to 8 bits. Convert it to sRGB at the + * same time to minimize quality loss. If a tRNS chunk is present + * this means libpng must handle it too; otherwise it is impossible + * to do the exact match on the 16-bit value. + * + * If the output has no alpha channel *and* the background color is + * gray then it is possible to let libpng handle the substitution by + * ensuring that the corresponding gray level matches the background + * color exactly. + */ + data_encoding = E_sRGB; + + if (PNG_GRAY_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "gray[16] color-map: too few entries"); + + cmap_entries = make_gray_colormap(display); + + if (png_ptr->num_trans > 0) + { + unsigned int back_alpha; + + if (output_format & PNG_FORMAT_FLAG_ALPHA) + back_alpha = 0; + + else + { + if (back_r == back_g && back_g == back_b) + { + /* Background is gray; no special processing will be + * required. + */ + png_color_16 c; + png_uint_32 gray = back_g; + + if (output_encoding == E_LINEAR) + { + gray = PNG_sRGB_FROM_LINEAR(gray * 255); + + /* And make sure the corresponding palette entry + * matches. + */ + png_create_colormap_entry(display, gray, back_g, back_g, + back_g, 65535, E_LINEAR); + } + + /* The background passed to libpng, however, must be the + * sRGB value. + */ + c.index = 0; /*unused*/ + c.gray = c.red = c.green = c.blue = (png_uint_16)gray; + + /* NOTE: does this work without expanding tRNS to alpha? + * It should be the color->gray case below apparently + * doesn't. + */ + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + + output_processing = PNG_CMAP_NONE; + break; + } + + back_alpha = output_encoding == E_LINEAR ? 65535 : 255; + } + + /* output_processing means that the libpng-processed row will be + * 8-bit GA and it has to be processing to single byte color-map + * values. Entry 254 is replaced by either a completely + * transparent entry or by the background color at full + * precision (and the background color is not a simple gray leve + * in this case.) + */ + expand_tRNS = 1; + output_processing = PNG_CMAP_TRANS; + background_index = 254; + + /* And set (overwrite) color-map entry 254 to the actual + * background color at full precision. + */ + png_create_colormap_entry(display, 254, back_r, back_g, back_b, + back_alpha, output_encoding); + } + + else + output_processing = PNG_CMAP_NONE; + } + break; + + case PNG_COLOR_TYPE_GRAY_ALPHA: + /* 8-bit or 16-bit PNG with two channels - gray and alpha. A minimum + * of 65536 combinations. If, however, the alpha channel is to be + * removed there are only 256 possibilities if the background is gray. + * (Otherwise there is a subset of the 65536 possibilities defined by + * the triangle between black, white and the background color.) + * + * Reduce 16-bit files to 8-bit and sRGB encode the result. No need to + * worry about tRNS matching - tRNS is ignored if there is an alpha + * channel. + */ + data_encoding = E_sRGB; + + if (output_format & PNG_FORMAT_FLAG_ALPHA) + { + if (PNG_GA_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "gray+alpha color-map: too few entries"); + + cmap_entries = make_ga_colormap(display); + + background_index = PNG_CMAP_GA_BACKGROUND; + output_processing = PNG_CMAP_GA; + } + + else /* alpha is removed */ + { + /* Alpha must be removed as the PNG data is processed when the + * background is a color because the G and A channels are + * independent and the vector addition (non-parallel vectors) is a + * 2-D problem. + * + * This can be reduced to the same algorithm as above by making a + * colormap containing gray levels (for the opaque grays), a + * background entry (for a transparent pixel) and a set of four six + * level color values, one set for each intermediate alpha value. + * See the comments in make_ga_colormap for how this works in the + * per-pixel processing. + * + * If the background is gray, however, we only need a 256 entry gray + * level color map. It is sufficient to make the entry generated + * for the background color be exactly the color specified. + */ + if ((output_format & PNG_FORMAT_FLAG_COLOR) == 0 || + (back_r == back_g && back_g == back_b)) + { + /* Background is gray; no special processing will be required. */ + png_color_16 c; + png_uint_32 gray = back_g; + + if (PNG_GRAY_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "gray-alpha color-map: too few entries"); + + cmap_entries = make_gray_colormap(display); + + if (output_encoding == E_LINEAR) + { + gray = PNG_sRGB_FROM_LINEAR(gray * 255); + + /* And make sure the corresponding palette entry matches. */ + png_create_colormap_entry(display, gray, back_g, back_g, + back_g, 65535, E_LINEAR); + } + + /* The background passed to libpng, however, must be the sRGB + * value. + */ + c.index = 0; /*unused*/ + c.gray = c.red = c.green = c.blue = (png_uint_16)gray; + + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + + output_processing = PNG_CMAP_NONE; + } + + else + { + png_uint_32 i, a; + + /* This is the same as png_make_ga_colormap, above, except that + * the entries are all opaque. + */ + if (PNG_GA_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "ga-alpha color-map: too few entries"); + + i = 0; + while (i < 231) + { + png_uint_32 gray = (i * 256 + 115) / 231; + png_create_colormap_entry(display, i++, gray, gray, gray, + 255, E_sRGB); + } + + /* NOTE: this preserves the full precision of the application + * background color. + */ + background_index = i; + png_create_colormap_entry(display, i++, back_r, back_g, back_b, + output_encoding == E_LINEAR ? 65535U : 255U, output_encoding); + + /* For non-opaque input composite on the sRGB background - this + * requires inverting the encoding for each component. The input + * is still converted to the sRGB encoding because this is a + * reasonable approximate to the logarithmic curve of human + * visual sensitivity, at least over the narrow range which PNG + * represents. Consequently 'G' is always sRGB encoded, while + * 'A' is linear. We need the linear background colors. + */ + if (output_encoding == E_sRGB) /* else already linear */ + { + /* This may produce a value not exactly matching the + * background, but that's ok because these numbers are only + * used when alpha != 0 + */ + back_r = png_sRGB_table[back_r]; + back_g = png_sRGB_table[back_g]; + back_b = png_sRGB_table[back_b]; + } + + for (a=1; a<5; ++a) + { + unsigned int g; + + /* PNG_sRGB_FROM_LINEAR expects a 16-bit linear value scaled + * by an 8-bit alpha value (0..255). + */ + png_uint_32 alpha = 51 * a; + png_uint_32 back_rx = (255-alpha) * back_r; + png_uint_32 back_gx = (255-alpha) * back_g; + png_uint_32 back_bx = (255-alpha) * back_b; + + for (g=0; g<6; ++g) + { + png_uint_32 gray = png_sRGB_table[g*51] * alpha; + + png_create_colormap_entry(display, i++, + PNG_sRGB_FROM_LINEAR(gray + back_rx), + PNG_sRGB_FROM_LINEAR(gray + back_gx), + PNG_sRGB_FROM_LINEAR(gray + back_bx), 255, E_sRGB); + } + } + + cmap_entries = i; + output_processing = PNG_CMAP_GA; + } + } + break; + + case PNG_COLOR_TYPE_RGB: + case PNG_COLOR_TYPE_RGB_ALPHA: + /* Exclude the case where the output is gray; we can always handle this + * with the cases above. + */ + if ((output_format & PNG_FORMAT_FLAG_COLOR) == 0) + { + /* The color-map will be grayscale, so we may as well convert the + * input RGB values to a simple grayscale and use the grayscale + * code above. + * + * NOTE: calling this apparently damages the recognition of the + * transparent color in background color handling; call + * png_set_tRNS_to_alpha before png_set_background_fixed. + */ + png_set_rgb_to_gray_fixed(png_ptr, PNG_ERROR_ACTION_NONE, -1, + -1); + data_encoding = E_sRGB; + + /* The output will now be one or two 8-bit gray or gray+alpha + * channels. The more complex case arises when the input has alpha. + */ + if ((png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + png_ptr->num_trans > 0) && + (output_format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + /* Both input and output have an alpha channel, so no background + * processing is required; just map the GA bytes to the right + * color-map entry. + */ + expand_tRNS = 1; + + if (PNG_GA_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "rgb[ga] color-map: too few entries"); + + cmap_entries = make_ga_colormap(display); + background_index = PNG_CMAP_GA_BACKGROUND; + output_processing = PNG_CMAP_GA; + } + + else + { + /* Either the input or the output has no alpha channel, so there + * will be no non-opaque pixels in the color-map; it will just be + * grayscale. + */ + if (PNG_GRAY_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "rgb[gray] color-map: too few entries"); + + /* Ideally this code would use libpng to do the gamma correction, + * but if an input alpha channel is to be removed we will hit the + * libpng bug in gamma+compose+rgb-to-gray (the double gamma + * correction bug). Fix this by dropping the gamma correction in + * this case and doing it in the palette; this will result in + * duplicate palette entries, but that's better than the + * alternative of double gamma correction. + */ + if ((png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + png_ptr->num_trans > 0) && + png_gamma_not_sRGB(png_ptr->colorspace.gamma)) + { + cmap_entries = make_gray_file_colormap(display); + data_encoding = E_FILE; + } + + else + cmap_entries = make_gray_colormap(display); + + /* But if the input has alpha or transparency it must be removed + */ + if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + png_ptr->num_trans > 0) + { + png_color_16 c; + png_uint_32 gray = back_g; + + /* We need to ensure that the application background exists in + * the colormap and that completely transparent pixels map to + * it. Achieve this simply by ensuring that the entry + * selected for the background really is the background color. + */ + if (data_encoding == E_FILE) /* from the fixup above */ + { + /* The app supplied a gray which is in output_encoding, we + * need to convert it to a value of the input (E_FILE) + * encoding then set this palette entry to the required + * output encoding. + */ + if (output_encoding == E_sRGB) + gray = png_sRGB_table[gray]; /* now E_LINEAR */ + + gray = PNG_DIV257(png_gamma_16bit_correct(gray, + png_ptr->colorspace.gamma)); /* now E_FILE */ + + /* And make sure the corresponding palette entry contains + * exactly the required sRGB value. + */ + png_create_colormap_entry(display, gray, back_g, back_g, + back_g, 0/*unused*/, output_encoding); + } + + else if (output_encoding == E_LINEAR) + { + gray = PNG_sRGB_FROM_LINEAR(gray * 255); + + /* And make sure the corresponding palette entry matches. + */ + png_create_colormap_entry(display, gray, back_g, back_g, + back_g, 0/*unused*/, E_LINEAR); + } + + /* The background passed to libpng, however, must be the + * output (normally sRGB) value. + */ + c.index = 0; /*unused*/ + c.gray = c.red = c.green = c.blue = (png_uint_16)gray; + + /* NOTE: the following is apparently a bug in libpng. Without + * it the transparent color recognition in + * png_set_background_fixed seems to go wrong. + */ + expand_tRNS = 1; + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + } + + output_processing = PNG_CMAP_NONE; + } + } + + else /* output is color */ + { + /* We could use png_quantize here so long as there is no transparent + * color or alpha; png_quantize ignores alpha. Easier overall just + * to do it once and using PNG_DIV51 on the 6x6x6 reduced RGB cube. + * Consequently we always want libpng to produce sRGB data. + */ + data_encoding = E_sRGB; + + /* Is there any transparency or alpha? */ + if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + png_ptr->num_trans > 0) + { + /* Is there alpha in the output too? If so all four channels are + * processed into a special RGB cube with alpha support. + */ + if (output_format & PNG_FORMAT_FLAG_ALPHA) + { + png_uint_32 r; + + if (PNG_RGB_COLORMAP_ENTRIES+1+27 > image->colormap_entries) + png_error(png_ptr, "rgb+alpha color-map: too few entries"); + + cmap_entries = make_rgb_colormap(display); + + /* Add a transparent entry. */ + png_create_colormap_entry(display, cmap_entries, 255, 255, + 255, 0, E_sRGB); + + /* This is stored as the background index for the processing + * algorithm. + */ + background_index = cmap_entries++; + + /* Add 27 r,g,b entries each with alpha 0.5. */ + for (r=0; r<256; r = (r << 1) | 0x7f) + { + png_uint_32 g; + + for (g=0; g<256; g = (g << 1) | 0x7f) + { + png_uint_32 b; + + /* This generates components with the values 0, 127 and + * 255 + */ + for (b=0; b<256; b = (b << 1) | 0x7f) + png_create_colormap_entry(display, cmap_entries++, + r, g, b, 128, E_sRGB); + } + } + + expand_tRNS = 1; + output_processing = PNG_CMAP_RGB_ALPHA; + } + + else + { + /* Alpha/transparency must be removed. The background must + * exist in the color map (achieved by setting adding it after + * the 666 color-map). If the standard processing code will + * pick up this entry automatically that's all that is + * required; libpng can be called to do the background + * processing. + */ + unsigned int sample_size = + PNG_IMAGE_SAMPLE_SIZE(output_format); + png_uint_32 r, g, b; /* sRGB background */ + + if (PNG_RGB_COLORMAP_ENTRIES+1+27 > image->colormap_entries) + png_error(png_ptr, "rgb-alpha color-map: too few entries"); + + cmap_entries = make_rgb_colormap(display); + + png_create_colormap_entry(display, cmap_entries, back_r, + back_g, back_b, 0/*unused*/, output_encoding); + + if (output_encoding == E_LINEAR) + { + r = PNG_sRGB_FROM_LINEAR(back_r * 255); + g = PNG_sRGB_FROM_LINEAR(back_g * 255); + b = PNG_sRGB_FROM_LINEAR(back_b * 255); + } + + else + { + r = back_r; + g = back_g; + b = back_g; + } + + /* Compare the newly-created color-map entry with the one the + * PNG_CMAP_RGB algorithm will use. If the two entries don't + * match, add the new one and set this as the background index. + */ + if (memcmp((png_const_bytep)display->colormap + + sample_size * cmap_entries, + (png_const_bytep)display->colormap + + sample_size * PNG_RGB_INDEX(r,g,b), + sample_size) != 0) + { + /* The background color must be added. */ + background_index = cmap_entries++; + + /* Add 27 r,g,b entries each with created by composing with + * the background at alpha 0.5. + */ + for (r=0; r<256; r = (r << 1) | 0x7f) + { + for (g=0; g<256; g = (g << 1) | 0x7f) + { + /* This generates components with the values 0, 127 + * and 255 + */ + for (b=0; b<256; b = (b << 1) | 0x7f) + png_create_colormap_entry(display, cmap_entries++, + png_colormap_compose(display, r, E_sRGB, 128, + back_r, output_encoding), + png_colormap_compose(display, g, E_sRGB, 128, + back_g, output_encoding), + png_colormap_compose(display, b, E_sRGB, 128, + back_b, output_encoding), + 0/*unused*/, output_encoding); + } + } + + expand_tRNS = 1; + output_processing = PNG_CMAP_RGB_ALPHA; + } + + else /* background color is in the standard color-map */ + { + png_color_16 c; + + c.index = 0; /*unused*/ + c.red = (png_uint_16)back_r; + c.gray = c.green = (png_uint_16)back_g; + c.blue = (png_uint_16)back_b; + + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + + output_processing = PNG_CMAP_RGB; + } + } + } + + else /* no alpha or transparency in the input */ + { + /* Alpha in the output is irrelevant, simply map the opaque input + * pixels to the 6x6x6 color-map. + */ + if (PNG_RGB_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "rgb color-map: too few entries"); + + cmap_entries = make_rgb_colormap(display); + output_processing = PNG_CMAP_RGB; + } + } + break; + + case PNG_COLOR_TYPE_PALETTE: + /* It's already got a color-map. It may be necessary to eliminate the + * tRNS entries though. + */ + { + unsigned int num_trans = png_ptr->num_trans; + png_const_bytep trans = num_trans > 0 ? png_ptr->trans_alpha : NULL; + png_const_colorp colormap = png_ptr->palette; + const int do_background = trans != NULL && + (output_format & PNG_FORMAT_FLAG_ALPHA) == 0; + unsigned int i; + + /* Just in case: */ + if (trans == NULL) + num_trans = 0; + + output_processing = PNG_CMAP_NONE; + data_encoding = E_FILE; /* Don't change from color-map indicies */ + cmap_entries = png_ptr->num_palette; + if (cmap_entries > 256) + cmap_entries = 256; + + if (cmap_entries > image->colormap_entries) + png_error(png_ptr, "palette color-map: too few entries"); + + for (i=0; i < cmap_entries; ++i) + { + if (do_background && i < num_trans && trans[i] < 255) + { + if (trans[i] == 0) + png_create_colormap_entry(display, i, back_r, back_g, + back_b, 0, output_encoding); + + else + { + /* Must compose the PNG file color in the color-map entry + * on the sRGB color in 'back'. + */ + png_create_colormap_entry(display, i, + png_colormap_compose(display, colormap[i].red, E_FILE, + trans[i], back_r, output_encoding), + png_colormap_compose(display, colormap[i].green, E_FILE, + trans[i], back_g, output_encoding), + png_colormap_compose(display, colormap[i].blue, E_FILE, + trans[i], back_b, output_encoding), + output_encoding == E_LINEAR ? trans[i] * 257U : + trans[i], + output_encoding); + } + } + + else + png_create_colormap_entry(display, i, colormap[i].red, + colormap[i].green, colormap[i].blue, + i < num_trans ? trans[i] : 255U, E_FILE/*8-bit*/); + } + + /* The PNG data may have indicies packed in fewer than 8 bits, it + * must be expanded if so. + */ + if (png_ptr->bit_depth < 8) + png_set_packing(png_ptr); + } + break; + + default: + png_error(png_ptr, "invalid PNG color type"); + /*NOT REACHED*/ + break; + } + + /* Now deal with the output processing */ + if (expand_tRNS && png_ptr->num_trans > 0 && + (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) == 0) + png_set_tRNS_to_alpha(png_ptr); + + switch (data_encoding) + { + default: + png_error(png_ptr, "bad data option (internal error)"); + break; + + case E_sRGB: + /* Change to 8-bit sRGB */ + png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, PNG_GAMMA_sRGB); + /* FALL THROUGH */ + + case E_FILE: + if (png_ptr->bit_depth > 8) + png_set_scale_16(png_ptr); + break; + } + + if (cmap_entries > 256 || cmap_entries > image->colormap_entries) + png_error(png_ptr, "color map overflow (BAD internal error)"); + + image->colormap_entries = cmap_entries; + + /* Double check using the recorded background index */ + switch (output_processing) + { + case PNG_CMAP_NONE: + if (background_index != PNG_CMAP_NONE_BACKGROUND) + goto bad_background; + break; + + case PNG_CMAP_GA: + if (background_index != PNG_CMAP_GA_BACKGROUND) + goto bad_background; + break; + + case PNG_CMAP_TRANS: + if (background_index >= cmap_entries || + background_index != PNG_CMAP_TRANS_BACKGROUND) + goto bad_background; + break; + + case PNG_CMAP_RGB: + if (background_index != PNG_CMAP_RGB_BACKGROUND) + goto bad_background; + break; + + case PNG_CMAP_RGB_ALPHA: + if (background_index != PNG_CMAP_RGB_ALPHA_BACKGROUND) + goto bad_background; + break; + + default: + png_error(png_ptr, "bad processing option (internal error)"); + + bad_background: + png_error(png_ptr, "bad background index (internal error)"); + } + + display->colormap_processing = output_processing; + + return 1/*ok*/; +} + +/* The final part of the color-map read called from png_image_finish_read. */ +static int +png_image_read_and_map(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + int passes; + + /* Called when the libpng data must be transformed into the color-mapped + * form. There is a local row buffer in display->local and this routine must + * do the interlace handling. + */ + switch (png_ptr->interlaced) + { + case PNG_INTERLACE_NONE: + passes = 1; + break; + + case PNG_INTERLACE_ADAM7: + passes = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + passes = 0; + png_error(png_ptr, "unknown interlace type"); + } + + { + png_uint_32 height = image->height; + png_uint_32 width = image->width; + int proc = display->colormap_processing; + png_bytep first_row = png_voidcast(png_bytep, display->first_row); + ptrdiff_t step_row = display->row_bytes; + int pass; + + for (pass = 0; pass < passes; ++pass) + { + unsigned int startx, stepx, stepy; + png_uint_32 y; + + if (png_ptr->interlaced == PNG_INTERLACE_ADAM7) + { + /* The row may be empty for a short image: */ + if (PNG_PASS_COLS(width, pass) == 0) + continue; + + startx = PNG_PASS_START_COL(pass); + stepx = PNG_PASS_COL_OFFSET(pass); + y = PNG_PASS_START_ROW(pass); + stepy = PNG_PASS_ROW_OFFSET(pass); + } + + else + { + y = 0; + startx = 0; + stepx = stepy = 1; + } + + for (; ylocal_row); + png_bytep outrow = first_row + y * step_row; + png_const_bytep end_row = outrow + width; + + /* Read read the libpng data into the temporary buffer. */ + png_read_row(png_ptr, inrow, NULL); + + /* Now process the row according to the processing option, note + * that the caller verifies that the format of the libpng output + * data is as required. + */ + outrow += startx; + switch (proc) + { + case PNG_CMAP_GA: + for (; outrow < end_row; outrow += stepx) + { + /* The data is always in the PNG order */ + unsigned int gray = *inrow++; + unsigned int alpha = *inrow++; + unsigned int entry; + + /* NOTE: this code is copied as a comment in + * make_ga_colormap above. Please update the + * comment if you change this code! + */ + if (alpha > 229) /* opaque */ + { + entry = (231 * gray + 128) >> 8; + } + else if (alpha < 26) /* transparent */ + { + entry = 231; + } + else /* partially opaque */ + { + entry = 226 + 6 * PNG_DIV51(alpha) + PNG_DIV51(gray); + } + + *outrow = (png_byte)entry; + } + break; + + case PNG_CMAP_TRANS: + for (; outrow < end_row; outrow += stepx) + { + png_byte gray = *inrow++; + png_byte alpha = *inrow++; + + if (alpha == 0) + *outrow = PNG_CMAP_TRANS_BACKGROUND; + + else if (gray != PNG_CMAP_TRANS_BACKGROUND) + *outrow = gray; + + else + *outrow = (png_byte)(PNG_CMAP_TRANS_BACKGROUND+1); + } + break; + + case PNG_CMAP_RGB: + for (; outrow < end_row; outrow += stepx) + { + *outrow = PNG_RGB_INDEX(inrow[0], inrow[1], inrow[2]); + inrow += 3; + } + break; + + case PNG_CMAP_RGB_ALPHA: + for (; outrow < end_row; outrow += stepx) + { + unsigned int alpha = inrow[3]; + + /* Because the alpha entries only hold alpha==0.5 values + * split the processing at alpha==0.25 (64) and 0.75 + * (196). + */ + + if (alpha >= 196) + *outrow = PNG_RGB_INDEX(inrow[0], inrow[1], + inrow[2]); + + else if (alpha < 64) + *outrow = PNG_CMAP_RGB_ALPHA_BACKGROUND; + + else + { + /* Likewise there are three entries for each of r, g + * and b. We could select the entry by popcount on + * the top two bits on those architectures that + * support it, this is what the code below does, + * crudely. + */ + unsigned int back_i = PNG_CMAP_RGB_ALPHA_BACKGROUND+1; + + /* Here are how the values map: + * + * 0x00 .. 0x3f -> 0 + * 0x40 .. 0xbf -> 1 + * 0xc0 .. 0xff -> 2 + * + * So, as above with the explicit alpha checks, the + * breakpoints are at 64 and 196. + */ + if (inrow[0] & 0x80) back_i += 9; /* red */ + if (inrow[0] & 0x40) back_i += 9; + if (inrow[0] & 0x80) back_i += 3; /* green */ + if (inrow[0] & 0x40) back_i += 3; + if (inrow[0] & 0x80) back_i += 1; /* blue */ + if (inrow[0] & 0x40) back_i += 1; + + *outrow = (png_byte)back_i; + } + + inrow += 4; + } + break; + + default: + break; + } + } + } + } + + return 1; +} + +static int +png_image_read_colormapped(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_controlp control = image->opaque; + png_structrp png_ptr = control->png_ptr; + png_inforp info_ptr = control->info_ptr; + + int passes = 0; /* As a flag */ + + PNG_SKIP_CHUNKS(png_ptr); + + /* Update the 'info' structure and make sure the result is as required; first + * make sure to turn on the interlace handling if it will be required + * (because it can't be turned on *after* the call to png_read_update_info!) + */ + if (display->colormap_processing == PNG_CMAP_NONE) + passes = png_set_interlace_handling(png_ptr); + + png_read_update_info(png_ptr, info_ptr); + + /* The expected output can be deduced from the colormap_processing option. */ + switch (display->colormap_processing) + { + case PNG_CMAP_NONE: + /* Output must be one channel and one byte per pixel, the output + * encoding can be anything. + */ + if ((info_ptr->color_type == PNG_COLOR_TYPE_PALETTE || + info_ptr->color_type == PNG_COLOR_TYPE_GRAY) && + info_ptr->bit_depth == 8) + break; + + goto bad_output; + + case PNG_CMAP_TRANS: + case PNG_CMAP_GA: + /* Output must be two channels and the 'G' one must be sRGB, the latter + * can be checked with an exact number because it should have been set + * to this number above! + */ + if (info_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA && + info_ptr->bit_depth == 8 && + png_ptr->screen_gamma == PNG_GAMMA_sRGB && + image->colormap_entries == 256) + break; + + goto bad_output; + + case PNG_CMAP_RGB: + /* Output must be 8-bit sRGB encoded RGB */ + if (info_ptr->color_type == PNG_COLOR_TYPE_RGB && + info_ptr->bit_depth == 8 && + png_ptr->screen_gamma == PNG_GAMMA_sRGB && + image->colormap_entries == 216) + break; + + goto bad_output; + + case PNG_CMAP_RGB_ALPHA: + /* Output must be 8-bit sRGB encoded RGBA */ + if (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA && + info_ptr->bit_depth == 8 && + png_ptr->screen_gamma == PNG_GAMMA_sRGB && + image->colormap_entries == 244 /* 216 + 1 + 27 */) + break; + + /* goto bad_output; */ + /* FALL THROUGH */ + + default: + bad_output: + png_error(png_ptr, "bad color-map processing (internal error)"); + } + + /* Now read the rows. Do this here if it is possible to read directly into + * the output buffer, otherwise allocate a local row buffer of the maximum + * size libpng requires and call the relevant processing routine safely. + */ + { + png_voidp first_row = display->buffer; + ptrdiff_t row_bytes = display->row_stride; + + /* The following expression is designed to work correctly whether it gives + * a signed or an unsigned result. + */ + if (row_bytes < 0) + { + char *ptr = png_voidcast(char*, first_row); + ptr += (image->height-1) * (-row_bytes); + first_row = png_voidcast(png_voidp, ptr); + } + + display->first_row = first_row; + display->row_bytes = row_bytes; + } + + if (passes == 0) + { + int result; + png_voidp row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, info_ptr)); + + display->local_row = row; + result = png_safe_execute(image, png_image_read_and_map, display); + display->local_row = NULL; + png_free(png_ptr, row); + + return result; + } + + else + { + png_alloc_size_t row_bytes = display->row_bytes; + + while (--passes >= 0) + { + png_uint_32 y = image->height; + png_bytep row = png_voidcast(png_bytep, display->first_row); + + while (y-- > 0) + { + png_read_row(png_ptr, row, NULL); + row += row_bytes; + } + } + + return 1; + } +} + +/* Just the row reading part of png_image_read. */ +static int +png_image_read_composite(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + int passes; + + switch (png_ptr->interlaced) + { + case PNG_INTERLACE_NONE: + passes = 1; + break; + + case PNG_INTERLACE_ADAM7: + passes = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + passes = 0; + png_error(png_ptr, "unknown interlace type"); + } + + { + png_uint_32 height = image->height; + png_uint_32 width = image->width; + ptrdiff_t step_row = display->row_bytes; + unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) ? 3 : 1; + int pass; + + for (pass = 0; pass < passes; ++pass) + { + unsigned int startx, stepx, stepy; + png_uint_32 y; + + if (png_ptr->interlaced == PNG_INTERLACE_ADAM7) + { + /* The row may be empty for a short image: */ + if (PNG_PASS_COLS(width, pass) == 0) + continue; + + startx = PNG_PASS_START_COL(pass) * channels; + stepx = PNG_PASS_COL_OFFSET(pass) * channels; + y = PNG_PASS_START_ROW(pass); + stepy = PNG_PASS_ROW_OFFSET(pass); + } + + else + { + y = 0; + startx = 0; + stepx = channels; + stepy = 1; + } + + for (; ylocal_row); + png_bytep outrow; + png_const_bytep end_row; + + /* Read the row, which is packed: */ + png_read_row(png_ptr, inrow, NULL); + + outrow = png_voidcast(png_bytep, display->first_row); + outrow += y * step_row; + end_row = outrow + width * channels; + + /* Now do the composition on each pixel in this row. */ + outrow += startx; + for (; outrow < end_row; outrow += stepx) + { + png_byte alpha = inrow[channels]; + + if (alpha > 0) /* else no change to the output */ + { + unsigned int c; + + for (c=0; cimage; + png_structrp png_ptr = image->opaque->png_ptr; + png_inforp info_ptr = image->opaque->info_ptr; + png_uint_32 height = image->height; + png_uint_32 width = image->width; + int pass, passes; + + /* Double check the convoluted logic below. We expect to get here with + * libpng doing rgb to gray and gamma correction but background processing + * left to the png_image_read_background function. The rows libpng produce + * might be 8 or 16-bit but should always have two channels; gray plus alpha. + */ + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == 0) + png_error(png_ptr, "lost rgb to gray"); + + if ((png_ptr->transformations & PNG_COMPOSE) != 0) + png_error(png_ptr, "unexpected compose"); + + if (png_get_channels(png_ptr, info_ptr) != 2) + png_error(png_ptr, "lost/gained channels"); + + /* Expect the 8-bit case to always remove the alpha channel */ + if ((image->format & PNG_FORMAT_FLAG_LINEAR) == 0 && + (image->format & PNG_FORMAT_FLAG_ALPHA) != 0) + png_error(png_ptr, "unexpected 8-bit transformation"); + + switch (png_ptr->interlaced) + { + case PNG_INTERLACE_NONE: + passes = 1; + break; + + case PNG_INTERLACE_ADAM7: + passes = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + passes = 0; + png_error(png_ptr, "unknown interlace type"); + } + + switch (png_get_bit_depth(png_ptr, info_ptr)) + { + default: + png_error(png_ptr, "unexpected bit depth"); + break; + + case 8: + /* 8-bit sRGB gray values with an alpha channel; the alpha channel is + * to be removed by composing on a backgroundi: either the row if + * display->background is NULL or display->background->green if not. + * Unlike the code above ALPHA_OPTIMIZED has *not* been done. + */ + { + png_bytep first_row = png_voidcast(png_bytep, display->first_row); + ptrdiff_t step_row = display->row_bytes; + + for (pass = 0; pass < passes; ++pass) + { + png_bytep row = png_voidcast(png_bytep, + display->first_row); + unsigned int startx, stepx, stepy; + png_uint_32 y; + + if (png_ptr->interlaced == PNG_INTERLACE_ADAM7) + { + /* The row may be empty for a short image: */ + if (PNG_PASS_COLS(width, pass) == 0) + continue; + + startx = PNG_PASS_START_COL(pass); + stepx = PNG_PASS_COL_OFFSET(pass); + y = PNG_PASS_START_ROW(pass); + stepy = PNG_PASS_ROW_OFFSET(pass); + } + + else + { + y = 0; + startx = 0; + stepx = stepy = 1; + } + + if (display->background == NULL) + { + for (; ylocal_row); + png_bytep outrow = first_row + y * step_row; + png_const_bytep end_row = outrow + width; + + /* Read the row, which is packed: */ + png_read_row(png_ptr, inrow, NULL); + + /* Now do the composition on each pixel in this row. */ + outrow += startx; + for (; outrow < end_row; outrow += stepx) + { + png_byte alpha = inrow[1]; + + if (alpha > 0) /* else no change to the output */ + { + png_uint_32 component = inrow[0]; + + if (alpha < 255) /* else just use component */ + { + /* Since PNG_OPTIMIZED_ALPHA was not set it is + * necessary to invert the sRGB transfer + * function and multiply the alpha out. + */ + component = png_sRGB_table[component] * alpha; + component += png_sRGB_table[outrow[0]] * + (255-alpha); + component = PNG_sRGB_FROM_LINEAR(component); + } + + outrow[0] = (png_byte)component; + } + + inrow += 2; /* gray and alpha channel */ + } + } + } + + else /* constant background value */ + { + png_byte background8 = display->background->green; + png_uint_16 background = png_sRGB_table[background8]; + + for (; ylocal_row); + png_bytep outrow = first_row + y * step_row; + png_const_bytep end_row = outrow + width; + + /* Read the row, which is packed: */ + png_read_row(png_ptr, inrow, NULL); + + /* Now do the composition on each pixel in this row. */ + outrow += startx; + for (; outrow < end_row; outrow += stepx) + { + png_byte alpha = inrow[1]; + + if (alpha > 0) /* else use background */ + { + png_uint_32 component = inrow[0]; + + if (alpha < 255) /* else just use component */ + { + component = png_sRGB_table[component] * alpha; + component += background * (255-alpha); + component = PNG_sRGB_FROM_LINEAR(component); + } + + outrow[0] = (png_byte)component; + } + + else + outrow[0] = background8; + + inrow += 2; /* gray and alpha channel */ + } + + row += display->row_bytes; + } + } + } + } + break; + + case 16: + /* 16-bit linear with pre-multiplied alpha; the pre-multiplication must + * still be done and, maybe, the alpha channel removed. This code also + * handles the alpha-first option. + */ + { + png_uint_16p first_row = png_voidcast(png_uint_16p, + display->first_row); + /* The division by two is safe because the caller passed in a + * stride which was multiplied by 2 (below) to get row_bytes. + */ + ptrdiff_t step_row = display->row_bytes / 2; + int preserve_alpha = (image->format & PNG_FORMAT_FLAG_ALPHA) != 0; + unsigned int outchannels = 1+preserve_alpha; + int swap_alpha = 0; + + if (preserve_alpha && (image->format & PNG_FORMAT_FLAG_AFIRST)) + swap_alpha = 1; + + for (pass = 0; pass < passes; ++pass) + { + unsigned int startx, stepx, stepy; + png_uint_32 y; + + /* The 'x' start and step are adjusted to output components here. + */ + if (png_ptr->interlaced == PNG_INTERLACE_ADAM7) + { + /* The row may be empty for a short image: */ + if (PNG_PASS_COLS(width, pass) == 0) + continue; + + startx = PNG_PASS_START_COL(pass) * outchannels; + stepx = PNG_PASS_COL_OFFSET(pass) * outchannels; + y = PNG_PASS_START_ROW(pass); + stepy = PNG_PASS_ROW_OFFSET(pass); + } + + else + { + y = 0; + startx = 0; + stepx = outchannels; + stepy = 1; + } + + for (; ylocal_row), NULL); + inrow = png_voidcast(png_const_uint_16p, display->local_row); + + /* Now do the pre-multiplication on each pixel in this row. + */ + outrow += startx; + for (; outrow < end_row; outrow += stepx) + { + png_uint_32 component = inrow[0]; + png_uint_16 alpha = inrow[1]; + + if (alpha > 0) /* else 0 */ + { + if (alpha < 65535) /* else just use component */ + { + component *= alpha; + component += 32767; + component /= 65535; + } + } + + else + component = 0; + + outrow[swap_alpha] = (png_uint_16)component; + if (preserve_alpha) + outrow[1 ^ swap_alpha] = alpha; + + inrow += 2; /* components and alpha channel */ + } + } + } + } + break; + } + + return 1; +} + +/* The guts of png_image_finish_read as a png_safe_execute callback. */ +static int +png_image_read_direct(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + png_inforp info_ptr = image->opaque->info_ptr; + + png_uint_32 format = image->format; + int linear = (format & PNG_FORMAT_FLAG_LINEAR) != 0; + int do_local_compose = 0; + int do_local_background = 0; /* to avoid double gamma correction bug */ + int passes = 0; + + /* Add transforms to ensure the correct output format is produced then check + * that the required implementation support is there. Always expand; always + * need 8 bits minimum, no palette and expanded tRNS. + */ + png_set_expand(png_ptr); + + /* Now check the format to see if it was modified. */ + { + png_uint_32 base_format = png_image_format(png_ptr) & + ~PNG_FORMAT_FLAG_COLORMAP /* removed by png_set_expand */; + png_uint_32 change = format ^ base_format; + png_fixed_point output_gamma; + int mode; /* alpha mode */ + + /* Do this first so that we have a record if rgb to gray is happening. */ + if (change & PNG_FORMAT_FLAG_COLOR) + { + /* gray<->color transformation required. */ + if (format & PNG_FORMAT_FLAG_COLOR) + png_set_gray_to_rgb(png_ptr); + + else + { + /* libpng can't do both rgb to gray and + * background/pre-multiplication if there is also significant gamma + * correction, because both operations require linear colors and + * the code only supports one transform doing the gamma correction. + * Handle this by doing the pre-multiplication or background + * operation in this code, if necessary. + * + * TODO: fix this by rewriting pngrtran.c (!) + * + * For the moment (given that fixing this in pngrtran.c is an + * enormous change) 'do_local_background' is used to indicate that + * the problem exists. + */ + if (base_format & PNG_FORMAT_FLAG_ALPHA) + do_local_background = 1/*maybe*/; + + png_set_rgb_to_gray_fixed(png_ptr, PNG_ERROR_ACTION_NONE, + PNG_RGB_TO_GRAY_DEFAULT, PNG_RGB_TO_GRAY_DEFAULT); + } + + change &= ~PNG_FORMAT_FLAG_COLOR; + } + + /* Set the gamma appropriately, linear for 16-bit input, sRGB otherwise. + */ + { + png_fixed_point input_gamma_default; + + if (base_format & PNG_FORMAT_FLAG_LINEAR) + input_gamma_default = PNG_GAMMA_LINEAR; + else + input_gamma_default = PNG_DEFAULT_sRGB; + + /* Call png_set_alpha_mode to set the default for the input gamma; the + * output gamma is set by a second call below. + */ + png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, input_gamma_default); + } + + if (linear) + { + /* If there *is* an alpha channel in the input it must be multiplied + * out; use PNG_ALPHA_STANDARD, otherwise just use PNG_ALPHA_PNG. + */ + if (base_format & PNG_FORMAT_FLAG_ALPHA) + mode = PNG_ALPHA_STANDARD; /* associated alpha */ + + else + mode = PNG_ALPHA_PNG; + + output_gamma = PNG_GAMMA_LINEAR; + } + + else + { + mode = PNG_ALPHA_PNG; + output_gamma = PNG_DEFAULT_sRGB; + } + + /* If 'do_local_background' is set check for the presence of gamma + * correction; this is part of the work-round for the libpng bug + * described above. + * + * TODO: fix libpng and remove this. + */ + if (do_local_background) + { + png_fixed_point gtest; + + /* This is 'png_gamma_threshold' from pngrtran.c; the test used for + * gamma correction, the screen gamma hasn't been set on png_struct + * yet; it's set below. png_struct::gamma, however, is set to the + * final value. + */ + if (png_muldiv(>est, output_gamma, png_ptr->colorspace.gamma, + PNG_FP_1) && !png_gamma_significant(gtest)) + do_local_background = 0; + + else if (mode == PNG_ALPHA_STANDARD) + { + do_local_background = 2/*required*/; + mode = PNG_ALPHA_PNG; /* prevent libpng doing it */ + } + + /* else leave as 1 for the checks below */ + } + + /* If the bit-depth changes then handle that here. */ + if (change & PNG_FORMAT_FLAG_LINEAR) + { + if (linear /*16-bit output*/) + png_set_expand_16(png_ptr); + + else /* 8-bit output */ + png_set_scale_16(png_ptr); + + change &= ~PNG_FORMAT_FLAG_LINEAR; + } + + /* Now the background/alpha channel changes. */ + if (change & PNG_FORMAT_FLAG_ALPHA) + { + /* Removing an alpha channel requires composition for the 8-bit + * formats; for the 16-bit it is already done, above, by the + * pre-multiplication and the channel just needs to be stripped. + */ + if (base_format & PNG_FORMAT_FLAG_ALPHA) + { + /* If RGB->gray is happening the alpha channel must be left and the + * operation completed locally. + * + * TODO: fix libpng and remove this. + */ + if (do_local_background) + do_local_background = 2/*required*/; + + /* 16-bit output: just remove the channel */ + else if (linear) /* compose on black (well, pre-multiply) */ + png_set_strip_alpha(png_ptr); + + /* 8-bit output: do an appropriate compose */ + else if (display->background != NULL) + { + png_color_16 c; + + c.index = 0; /*unused*/ + c.red = display->background->red; + c.green = display->background->green; + c.blue = display->background->blue; + c.gray = display->background->green; + + /* This is always an 8-bit sRGB value, using the 'green' channel + * for gray is much better than calculating the luminance here; + * we can get off-by-one errors in that calculation relative to + * the app expectations and that will show up in transparent + * pixels. + */ + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + } + + else /* compose on row: implemented below. */ + { + do_local_compose = 1; + /* This leaves the alpha channel in the output, so it has to be + * removed by the code below. Set the encoding to the 'OPTIMIZE' + * one so the code only has to hack on the pixels that require + * composition. + */ + mode = PNG_ALPHA_OPTIMIZED; + } + } + + else /* output needs an alpha channel */ + { + /* This is tricky because it happens before the swap operation has + * been accomplished; however, the swap does *not* swap the added + * alpha channel (weird API), so it must be added in the correct + * place. + */ + png_uint_32 filler; /* opaque filler */ + int where; + + if (linear) + filler = 65535; + + else + filler = 255; + +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + { + where = PNG_FILLER_BEFORE; + change &= ~PNG_FORMAT_FLAG_AFIRST; + } + + else +# endif + where = PNG_FILLER_AFTER; + + png_set_add_alpha(png_ptr, filler, where); + } + + /* This stops the (irrelevant) call to swap_alpha below. */ + change &= ~PNG_FORMAT_FLAG_ALPHA; + } + + /* Now set the alpha mode correctly; this is always done, even if there is + * no alpha channel in either the input or the output because it correctly + * sets the output gamma. + */ + png_set_alpha_mode_fixed(png_ptr, mode, output_gamma); + +# ifdef PNG_FORMAT_BGR_SUPPORTED + if (change & PNG_FORMAT_FLAG_BGR) + { + /* Check only the output format; PNG is never BGR; don't do this if + * the output is gray, but fix up the 'format' value in that case. + */ + if (format & PNG_FORMAT_FLAG_COLOR) + png_set_bgr(png_ptr); + + else + format &= ~PNG_FORMAT_FLAG_BGR; + + change &= ~PNG_FORMAT_FLAG_BGR; + } +# endif + +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (change & PNG_FORMAT_FLAG_AFIRST) + { + /* Only relevant if there is an alpha channel - it's particularly + * important to handle this correctly because do_local_compose may + * be set above and then libpng will keep the alpha channel for this + * code to remove. + */ + if (format & PNG_FORMAT_FLAG_ALPHA) + { + /* Disable this if doing a local background, + * TODO: remove this when local background is no longer required. + */ + if (do_local_background != 2) + png_set_swap_alpha(png_ptr); + } + + else + format &= ~PNG_FORMAT_FLAG_AFIRST; + + change &= ~PNG_FORMAT_FLAG_AFIRST; + } +# endif + + /* If the *output* is 16-bit then we need to check for a byte-swap on this + * architecture. + */ + if (linear) + { + PNG_CONST png_uint_16 le = 0x0001; + + if (*(png_const_bytep)&le) + png_set_swap(png_ptr); + } + + /* If change is not now 0 some transformation is missing - error out. */ + if (change) + png_error(png_ptr, "png_read_image: unsupported transformation"); + } + + PNG_SKIP_CHUNKS(png_ptr); + + /* Update the 'info' structure and make sure the result is as required; first + * make sure to turn on the interlace handling if it will be required + * (because it can't be turned on *after* the call to png_read_update_info!) + * + * TODO: remove the do_local_background fixup below. + */ + if (!do_local_compose && do_local_background != 2) + passes = png_set_interlace_handling(png_ptr); + + png_read_update_info(png_ptr, info_ptr); + + { + png_uint_32 info_format = 0; + + if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) + info_format |= PNG_FORMAT_FLAG_COLOR; + + if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) + { + /* do_local_compose removes this channel below. */ + if (!do_local_compose) + { + /* do_local_background does the same if required. */ + if (do_local_background != 2 || + (format & PNG_FORMAT_FLAG_ALPHA) != 0) + info_format |= PNG_FORMAT_FLAG_ALPHA; + } + } + + else if (do_local_compose) /* internal error */ + png_error(png_ptr, "png_image_read: alpha channel lost"); + + if (info_ptr->bit_depth == 16) + info_format |= PNG_FORMAT_FLAG_LINEAR; + +# ifdef PNG_FORMAT_BGR_SUPPORTED + if (png_ptr->transformations & PNG_BGR) + info_format |= PNG_FORMAT_FLAG_BGR; +# endif + +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (do_local_background == 2) + { + if (format & PNG_FORMAT_FLAG_AFIRST) + info_format |= PNG_FORMAT_FLAG_AFIRST; + } + + if ((png_ptr->transformations & PNG_SWAP_ALPHA) != 0 || + ((png_ptr->transformations & PNG_ADD_ALPHA) != 0 && + (png_ptr->flags & PNG_FLAG_FILLER_AFTER) == 0)) + { + if (do_local_background == 2) + png_error(png_ptr, "unexpected alpha swap transformation"); + + info_format |= PNG_FORMAT_FLAG_AFIRST; + } +# endif + + /* This is actually an internal error. */ + if (info_format != format) + png_error(png_ptr, "png_read_image: invalid transformations"); + } + + /* Now read the rows. If do_local_compose is set then it is necessary to use + * a local row buffer. The output will be GA, RGBA or BGRA and must be + * converted to G, RGB or BGR as appropriate. The 'local_row' member of the + * display acts as a flag. + */ + { + png_voidp first_row = display->buffer; + ptrdiff_t row_bytes = display->row_stride; + + if (linear) + row_bytes *= 2; + + /* The following expression is designed to work correctly whether it gives + * a signed or an unsigned result. + */ + if (row_bytes < 0) + { + char *ptr = png_voidcast(char*, first_row); + ptr += (image->height-1) * (-row_bytes); + first_row = png_voidcast(png_voidp, ptr); + } + + display->first_row = first_row; + display->row_bytes = row_bytes; + } + + if (do_local_compose) + { + int result; + png_voidp row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, info_ptr)); + + display->local_row = row; + result = png_safe_execute(image, png_image_read_composite, display); + display->local_row = NULL; + png_free(png_ptr, row); + + return result; + } + + else if (do_local_background == 2) + { + int result; + png_voidp row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, info_ptr)); + + display->local_row = row; + result = png_safe_execute(image, png_image_read_background, display); + display->local_row = NULL; + png_free(png_ptr, row); + + return result; + } + + else + { + png_alloc_size_t row_bytes = display->row_bytes; + + while (--passes >= 0) + { + png_uint_32 y = image->height; + png_bytep row = png_voidcast(png_bytep, display->first_row); + + while (y-- > 0) + { + png_read_row(png_ptr, row, NULL); + row += row_bytes; + } + } + + return 1; + } +} + +int PNGAPI +png_image_finish_read(png_imagep image, png_const_colorp background, + void *buffer, png_int_32 row_stride, void *colormap) +{ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + png_uint_32 check; + + if (row_stride == 0) + row_stride = PNG_IMAGE_ROW_STRIDE(*image); + + if (row_stride < 0) + check = -row_stride; + + else + check = row_stride; + + if (image->opaque != NULL && buffer != NULL && + check >= PNG_IMAGE_ROW_STRIDE(*image)) + { + if ((image->format & PNG_FORMAT_FLAG_COLORMAP) == 0 || + (image->colormap_entries > 0 && colormap != NULL)) + { + int result; + png_image_read_control display; + + png_memset(&display, 0, sizeof display); + display.image = image; + display.buffer = buffer; + display.row_stride = row_stride; + display.colormap = colormap; + display.background = background; + display.local_row = NULL; + + /* Choose the correct 'end' routine; for the color-map case all the + * setup has already been done. + */ + if (image->format & PNG_FORMAT_FLAG_COLORMAP) + result = + png_safe_execute(image, png_image_read_colormap, &display) && + png_safe_execute(image, png_image_read_colormapped, &display); + + else + result = + png_safe_execute(image, png_image_read_direct, &display); + + png_image_free(image); + return result; + } + + else + return png_image_error(image, + "png_image_finish_read[color-map]: no color-map"); + } + + else + return png_image_error(image, + "png_image_finish_read: invalid argument"); + } + + return 0; +} + +#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */ #endif /* PNG_READ_SUPPORTED */ diff -ru4NwbB libpng-1.5.10/pngrio.c libpng-1.6.0beta22/pngrio.c --- libpng-1.5.10/pngrio.c 2012-03-29 00:06:54.581526324 -0500 +++ libpng-1.6.0beta22/pngrio.c 2012-05-23 12:30:56.152514462 -0500 @@ -1,9 +1,9 @@ /* pngrio.c - functions for data input * - * Last changed in libpng 1.5.0 [January 6, 2011] - * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * * This code is released under the libpng license. @@ -28,9 +28,9 @@ * buffering if you are using unbuffered reads. This should never be asked * to read more then 64K on a 16 bit machine. */ void /* PRIVATE */ -png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) +png_read_data(png_structrp png_ptr, png_bytep data, png_size_t length) { png_debug1(4, "reading %d bytes", (int)length); if (png_ptr->read_data_fn != NULL) @@ -45,9 +45,8 @@ * not reading from a standard C stream, you should create a replacement * read_data function and use it at run time with png_set_read_fn(), rather * than changing the library. */ -# ifndef USE_FAR_KEYWORD void PNGCBAPI png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; @@ -57,70 +56,13 @@ /* fread() returns 0 on error, so it is OK to store this in a png_size_t * instead of an int, which is what fread() actually returns. */ - check = fread(data, 1, length, (png_FILE_p)png_ptr->io_ptr); + check = fread(data, 1, length, png_voidcast(png_FILE_p, png_ptr->io_ptr)); if (check != length) png_error(png_ptr, "Read Error"); } -# else -/* This is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void PNGCBAPI -png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_size_t check; - png_byte *n_data; - png_FILE_p io_ptr; - - if (png_ptr == NULL) - return; - - /* Check if data really is near. If so, use usual code. */ - n_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - - if ((png_bytep)n_data == data) - { - check = fread(n_data, 1, length, io_ptr); - } - - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t read, remaining, err; - check = 0; - remaining = length; - - do - { - read = MIN(NEAR_BUF_SIZE, remaining); - err = fread(buf, 1, read, io_ptr); - png_memcpy(data, buf, read); /* copy far buffer to near buffer */ - - if (err != read) - break; - - else - check += err; - - data += read; - remaining -= read; - } - while (remaining != 0); - } - - if ((png_uint_32)check != (png_uint_32)length) - png_error(png_ptr, "read Error"); -} -# endif #endif /* This function allows the application to supply a new input function * for libpng if standard C streams aren't being used. @@ -141,9 +83,9 @@ * May be NULL, in which case libpng's default function will * be used. */ void PNGAPI -png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, +png_set_read_fn(png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr read_data_fn) { if (png_ptr == NULL) return; diff -ru4NwbB libpng-1.5.10/pngrtran.c libpng-1.6.0beta22/pngrtran.c --- libpng-1.5.10/pngrtran.c 2012-03-29 00:06:54.612484275 -0500 +++ libpng-1.6.0beta22/pngrtran.c 2012-05-23 12:30:56.170801458 -0500 @@ -1,8 +1,8 @@ /* pngrtran.c - transforms the data in a row for PNG readers * - * Last changed in libpng 1.5.10 [March 8, 2012] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -21,9 +21,9 @@ #ifdef PNG_READ_SUPPORTED /* Set the action on getting a CRC error for an ancillary or critical chunk. */ void PNGAPI -png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action) +png_set_crc_action(png_structrp png_ptr, int crit_action, int ancil_action) { png_debug(1, "in png_set_crc_action"); if (png_ptr == NULL) @@ -87,18 +87,48 @@ break; } } +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +/* Is it OK to set a transformation now? Only if png_start_read_image or + * png_read_update_info have not been called. It is not necessary for the IHDR + * to have been read in all cases, the parameter allows for this check too. + */ +static int +png_rtran_ok(png_structrp png_ptr, int need_IHDR) +{ + if (png_ptr != NULL) + { + if (png_ptr->flags & PNG_FLAG_ROW_INIT) + png_app_error(png_ptr, + "invalid after png_start_read_image or png_read_update_info"); + + else if (need_IHDR && (png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_app_error(png_ptr, "invalid before the PNG header has been read"); + + else + { + /* Turn on failure to initialize correctly for all transforms. */ + png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; + + return 1; /* Ok */ + } + } + + return 0; /* no png_error possible! */ +} +#endif + #ifdef PNG_READ_BACKGROUND_SUPPORTED /* Handle alpha and tRNS via a background color */ void PNGFAPI -png_set_background_fixed(png_structp png_ptr, +png_set_background_fixed(png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, int need_expand, png_fixed_point background_gamma) { png_debug(1, "in png_set_background_fixed"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0) || background_color == NULL) return; if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN) { @@ -109,10 +139,9 @@ png_ptr->transformations |= PNG_COMPOSE | PNG_STRIP_ALPHA; png_ptr->transformations &= ~PNG_ENCODE_ALPHA; png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; - png_memcpy(&(png_ptr->background), background_color, - png_sizeof(png_color_16)); + png_ptr->background = *background_color; png_ptr->background_gamma = background_gamma; png_ptr->background_gamma_type = (png_byte)(background_gamma_code); if (need_expand) png_ptr->transformations |= PNG_BACKGROUND_EXPAND; @@ -121,9 +150,9 @@ } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_background(png_structp png_ptr, +png_set_background(png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, int need_expand, double background_gamma) { png_set_background_fixed(png_ptr, background_color, background_gamma_code, @@ -137,13 +166,13 @@ * TRANSFORM and API behavior to be somewhat consistent, and it's simpler. */ #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED void PNGAPI -png_set_scale_16(png_structp png_ptr) +png_set_scale_16(png_structrp png_ptr) { png_debug(1, "in png_set_scale_16"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; png_ptr->transformations |= PNG_SCALE_16_TO_8; } @@ -151,35 +180,35 @@ #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED /* Chop 16-bit depth files to 8-bit depth */ void PNGAPI -png_set_strip_16(png_structp png_ptr) +png_set_strip_16(png_structrp png_ptr) { png_debug(1, "in png_set_strip_16"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; png_ptr->transformations |= PNG_16_TO_8; } #endif #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED void PNGAPI -png_set_strip_alpha(png_structp png_ptr) +png_set_strip_alpha(png_structrp png_ptr) { png_debug(1, "in png_set_strip_alpha"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; png_ptr->transformations |= PNG_STRIP_ALPHA; } #endif #if defined(PNG_READ_ALPHA_MODE_SUPPORTED) || defined(PNG_READ_GAMMA_SUPPORTED) static png_fixed_point -translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma, +translate_gamma_flags(png_structrp png_ptr, png_fixed_point output_gamma, int is_screen) { /* Check for flag values. The main reason for having the old Mac value as a * flag is that it is pretty near impossible to work out what the correct @@ -214,9 +243,9 @@ } # ifdef PNG_FLOATING_POINT_SUPPORTED static png_fixed_point -convert_gamma_value(png_structp png_ptr, double output_gamma) +convert_gamma_value(png_structrp png_ptr, double output_gamma) { /* The following silently ignores cases where fixed point (times 100,000) * gamma values are passed to the floating point API. This is safe and it * means the fixed point constants work just fine with the floating point @@ -239,17 +268,17 @@ #endif /* READ_ALPHA_MODE || READ_GAMMA */ #ifdef PNG_READ_ALPHA_MODE_SUPPORTED void PNGFAPI -png_set_alpha_mode_fixed(png_structp png_ptr, int mode, +png_set_alpha_mode_fixed(png_structrp png_ptr, int mode, png_fixed_point output_gamma) { int compose = 0; png_fixed_point file_gamma; png_debug(1, "in png_set_alpha_mode"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; output_gamma = translate_gamma_flags(png_ptr, output_gamma, 1/*screen*/); @@ -319,10 +348,13 @@ /* Only set the default gamma if the file gamma has not been set (this has * the side effect that the gamma in a second call to png_set_alpha_mode will * be ignored.) */ - if (png_ptr->gamma == 0) - png_ptr->gamma = file_gamma; + if (png_ptr->colorspace.gamma == 0) + { + png_ptr->colorspace.gamma = file_gamma; + png_ptr->colorspace.flags |= PNG_COLORSPACE_HAVE_GAMMA; + } /* But always set the output gamma: */ png_ptr->screen_gamma = output_gamma; @@ -332,9 +364,9 @@ if (compose) { /* And obtain alpha pre-multiplication by composing on black: */ png_memset(&png_ptr->background, 0, sizeof png_ptr->background); - png_ptr->background_gamma = png_ptr->gamma; /* just in case */ + png_ptr->background_gamma = png_ptr->colorspace.gamma; /* just in case */ png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_FILE; png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND; if (png_ptr->transformations & PNG_COMPOSE) @@ -342,16 +374,13 @@ "conflicting calls to set alpha mode and background"); png_ptr->transformations |= PNG_COMPOSE; } - - /* New API, make sure apps call the correct initializers: */ - png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_alpha_mode(png_structp png_ptr, int mode, double output_gamma) +png_set_alpha_mode(png_structrp png_ptr, int mode, double output_gamma) { png_set_alpha_mode_fixed(png_ptr, mode, convert_gamma_value(png_ptr, output_gamma)); } @@ -369,23 +398,23 @@ */ typedef struct png_dsort_struct { - struct png_dsort_struct FAR * next; + struct png_dsort_struct * next; png_byte left; png_byte right; } png_dsort; -typedef png_dsort FAR * png_dsortp; -typedef png_dsort FAR * FAR * png_dsortpp; +typedef png_dsort * png_dsortp; +typedef png_dsort * * png_dsortpp; void PNGAPI -png_set_quantize(png_structp png_ptr, png_colorp palette, +png_set_quantize(png_structrp png_ptr, png_colorp palette, int num_palette, int maximum_colors, png_const_uint_16p histogram, int full_quantize) { png_debug(1, "in png_set_quantize"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; png_ptr->transformations |= PNG_QUANTIZE; @@ -765,49 +794,49 @@ #endif /* PNG_READ_QUANTIZE_SUPPORTED */ #ifdef PNG_READ_GAMMA_SUPPORTED void PNGFAPI -png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma, +png_set_gamma_fixed(png_structrp png_ptr, png_fixed_point scrn_gamma, png_fixed_point file_gamma) { png_debug(1, "in png_set_gamma_fixed"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; /* New in libpng-1.5.4 - reserve particular negative values as flags. */ scrn_gamma = translate_gamma_flags(png_ptr, scrn_gamma, 1/*screen*/); file_gamma = translate_gamma_flags(png_ptr, file_gamma, 0/*file*/); -#if PNG_LIBPNG_VER >= 10600 /* Checking the gamma values for being >0 was added in 1.5.4 along with the * premultiplied alpha support; this actually hides an undocumented feature * of the previous implementation which allowed gamma processing to be * disabled in background handling. There is no evidence (so far) that this * was being used; however, png_set_background itself accepted and must still * accept '0' for the gamma value it takes, because it isn't always used. * * Since this is an API change (albeit a very minor one that removes an - * undocumented API feature) it will not be made until libpng-1.6.0. + * undocumented API feature) the following checks were only enabled in + * libpng-1.6.0. */ if (file_gamma <= 0) png_error(png_ptr, "invalid file gamma in png_set_gamma"); if (scrn_gamma <= 0) png_error(png_ptr, "invalid screen gamma in png_set_gamma"); -#endif /* Set the gamma values unconditionally - this overrides the value in the PNG * file if a gAMA chunk was present. png_set_alpha_mode provides a * different, easier, way to default the file gamma. */ - png_ptr->gamma = file_gamma; + png_ptr->colorspace.gamma = file_gamma; + png_ptr->colorspace.flags |= PNG_COLORSPACE_HAVE_GAMMA; png_ptr->screen_gamma = scrn_gamma; } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma) +png_set_gamma(png_structrp png_ptr, double scrn_gamma, double file_gamma) { png_set_gamma_fixed(png_ptr, convert_gamma_value(png_ptr, scrn_gamma), convert_gamma_value(png_ptr, file_gamma)); } @@ -819,17 +848,16 @@ * less than 8-bit depth to 8-bit depth, and expand tRNS chunks * to alpha channels. */ void PNGAPI -png_set_expand(png_structp png_ptr) +png_set_expand(png_structrp png_ptr) { png_debug(1, "in png_set_expand"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; } /* GRR 19990627: the following three functions currently are identical * to png_set_expand(). However, it is entirely reasonable that someone @@ -850,89 +878,84 @@ */ /* Expand paletted images to RGB. */ void PNGAPI -png_set_palette_to_rgb(png_structp png_ptr) +png_set_palette_to_rgb(png_structrp png_ptr) { png_debug(1, "in png_set_palette_to_rgb"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; } /* Expand grayscale images of less than 8-bit depth to 8 bits. */ void PNGAPI -png_set_expand_gray_1_2_4_to_8(png_structp png_ptr) +png_set_expand_gray_1_2_4_to_8(png_structrp png_ptr) { png_debug(1, "in png_set_expand_gray_1_2_4_to_8"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; png_ptr->transformations |= PNG_EXPAND; - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; } - - /* Expand tRNS chunks to alpha channels. */ void PNGAPI -png_set_tRNS_to_alpha(png_structp png_ptr) +png_set_tRNS_to_alpha(png_structrp png_ptr) { png_debug(1, "in png_set_tRNS_to_alpha"); + if (!png_rtran_ok(png_ptr, 0)) + return; + png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; } #endif /* defined(PNG_READ_EXPAND_SUPPORTED) */ #ifdef PNG_READ_EXPAND_16_SUPPORTED /* Expand to 16-bit channels, expand the tRNS chunk too (because otherwise * it may not work correctly.) */ void PNGAPI -png_set_expand_16(png_structp png_ptr) +png_set_expand_16(png_structrp png_ptr) { png_debug(1, "in png_set_expand_16"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; png_ptr->transformations |= (PNG_EXPAND_16 | PNG_EXPAND | PNG_EXPAND_tRNS); - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; - - /* New API, make sure apps call the correct initializers: */ - png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; } #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED void PNGAPI -png_set_gray_to_rgb(png_structp png_ptr) +png_set_gray_to_rgb(png_structrp png_ptr) { png_debug(1, "in png_set_gray_to_rgb"); - if (png_ptr != NULL) - { + if (!png_rtran_ok(png_ptr, 0)) + return; + /* Because rgb must be 8 bits or more: */ png_set_expand_gray_1_2_4_to_8(png_ptr); png_ptr->transformations |= PNG_GRAY_TO_RGB; - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; - } } #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED void PNGFAPI -png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, +png_set_rgb_to_gray_fixed(png_structrp png_ptr, int error_action, png_fixed_point red, png_fixed_point green) { png_debug(1, "in png_set_rgb_to_gray"); - if (png_ptr == NULL) + /* Need the IHDR here because of the check on color_type below. */ + /* TODO: fix this */ + if (!png_rtran_ok(png_ptr, 1)) return; switch(error_action) { @@ -956,12 +980,15 @@ #ifdef PNG_READ_EXPAND_SUPPORTED png_ptr->transformations |= PNG_EXPAND; #else { - png_warning(png_ptr, + /* Make this an error in 1.6 because otherwise the application may assume + * that it just worked and get a memory overwrite. + */ + png_error(png_ptr, "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED"); - png_ptr->transformations &= ~PNG_RGB_TO_GRAY; + /* png_ptr->transformations &= ~PNG_RGB_TO_GRAY; */ } #endif { if (red >= 0 && green >= 0 && red + green <= PNG_FP_1) @@ -983,9 +1010,9 @@ else { if (red >= 0 && green >= 0) - png_warning(png_ptr, + png_app_warning(png_ptr, "ignoring out of range rgb_to_gray coefficients"); /* Use the defaults, from the cHRM chunk if set, else the historical * values which are close to the sRGB/HDTV/ITU-Rec 709 values. See @@ -1009,31 +1036,28 @@ * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image. */ void PNGAPI -png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red, +png_set_rgb_to_gray(png_structrp png_ptr, int error_action, double red, double green) { - if (png_ptr == NULL) - return; - png_set_rgb_to_gray_fixed(png_ptr, error_action, png_fixed(png_ptr, red, "rgb to gray red coefficient"), png_fixed(png_ptr, green, "rgb to gray green coefficient")); } #endif /* FLOATING POINT */ -#endif +#endif /* RGB_TO_GRAY */ #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) void PNGAPI -png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr +png_set_read_user_transform_fn(png_structrp png_ptr, png_user_transform_ptr read_user_transform_fn) { png_debug(1, "in png_set_read_user_transform_fn"); - if (png_ptr == NULL) + if (!png_rtran_ok(png_ptr, 0)) return; #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED png_ptr->transformations |= PNG_USER_TRANSFORM; @@ -1073,9 +1097,9 @@ * The intent is that these two routines should have palette or rgb operations * extracted from 'png_init_read_transformations'. */ static void /* PRIVATE */ -png_init_palette_transformations(png_structp png_ptr) +png_init_palette_transformations(png_structrp png_ptr) { /* Called to handle the (input) palette case. In png_do_read_transformations * the first step is to expand the palette if requested, so this code must * take care to only make changes that are invariant with respect to the @@ -1156,9 +1180,9 @@ #endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ } static void /* PRIVATE */ -png_init_rgb_transformations(png_structp png_ptr) +png_init_rgb_transformations(png_structrp png_ptr) { /* Added to libpng-1.5.4: check the color type to determine whether there * is any alpha or transparency in the image and simply cancel the * background and alpha mode stuff if there isn't. @@ -1241,9 +1265,9 @@ #endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ } void /* PRIVATE */ -png_init_read_transformations(png_structp png_ptr) +png_init_read_transformations(png_structrp png_ptr) { png_debug(1, "in png_init_read_transformations"); /* This internal function is called from png_read_start_row in pngrutil.c @@ -1266,36 +1290,39 @@ * required. */ int gamma_correction = 0; - if (png_ptr->gamma != 0) /* has been set */ + if (png_ptr->colorspace.gamma != 0) /* has been set */ { if (png_ptr->screen_gamma != 0) /* screen set too */ - gamma_correction = png_gamma_threshold(png_ptr->gamma, + gamma_correction = png_gamma_threshold(png_ptr->colorspace.gamma, png_ptr->screen_gamma); else /* Assume the output matches the input; a long time default behavior * of libpng, although the standard has nothing to say about this. */ - png_ptr->screen_gamma = png_reciprocal(png_ptr->gamma); + png_ptr->screen_gamma = png_reciprocal(png_ptr->colorspace.gamma); } else if (png_ptr->screen_gamma != 0) /* The converse - assume the file matches the screen, note that this * perhaps undesireable default can (from 1.5.4) be changed by calling * png_set_alpha_mode (even if the alpha handling mode isn't required * or isn't changed from the default.) */ - png_ptr->gamma = png_reciprocal(png_ptr->screen_gamma); + png_ptr->colorspace.gamma = png_reciprocal(png_ptr->screen_gamma); else /* neither are set */ /* Just in case the following prevents any processing - file and screen * are both assumed to be linear and there is no way to introduce a * third gamma value other than png_set_background with 'UNIQUE', and, * prior to 1.5.4 */ - png_ptr->screen_gamma = png_ptr->gamma = PNG_FP_1; + png_ptr->screen_gamma = png_ptr->colorspace.gamma = PNG_FP_1; + + /* We have a gamma value now. */ + png_ptr->colorspace.flags |= PNG_COLORSPACE_HAVE_GAMMA; /* Now turn the gamma transformation on or off as appropriate. Notice * that PNG_GAMMA just refers to the file->screen correction. Alpha * composition may independently cause gamma correction because it needs @@ -1375,11 +1402,18 @@ png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; } #endif -#if defined(PNG_READ_EXPAND_SUPPORTED) && \ - defined(PNG_READ_BACKGROUND_SUPPORTED) && \ - defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Make sure the coefficients for the rgb to gray convertion are set + * appropriately. + */ + if (png_ptr->transformations & PNG_RGB_TO_GRAY) + png_colorspace_set_rgb_coefficients(png_ptr); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +#if defined PNG_READ_EXPAND_SUPPORTED && defined PNG_READ_BACKGROUND_SUPPORTED /* Detect gray background and attempt to enable optimization for * gray --> RGB case. * * Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or @@ -1419,9 +1453,10 @@ png_ptr->background.gray = png_ptr->background.red; } } } -#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED (etc) */ +#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ +#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED */ /* For indexed PNG data (PNG_COLOR_TYPE_PALETTE) many of the transformations * can be performed directly on the palette, and some (such as rgb to gray) * can be optimized inside the palette. This is particularly true of the @@ -1455,9 +1490,9 @@ * * NOTE: this discards the low 16 bits of the user supplied background * color, but until expand_16 works properly there is no choice! */ -# define CHOP(x) (x)=((png_uint_16)(((png_uint_32)(x)*255+32895) >> 16)) +# define CHOP(x) (x)=((png_uint_16)PNG_DIV257(x)) CHOP(png_ptr->background.red); CHOP(png_ptr->background.green); CHOP(png_ptr->background.blue); CHOP(png_ptr->background.gray); @@ -1515,12 +1550,12 @@ * tables. */ if ((png_ptr->transformations & PNG_GAMMA) || ((png_ptr->transformations & PNG_RGB_TO_GRAY) - && (png_gamma_significant(png_ptr->gamma) || + && (png_gamma_significant(png_ptr->colorspace.gamma) || png_gamma_significant(png_ptr->screen_gamma))) || ((png_ptr->transformations & PNG_COMPOSE) - && (png_gamma_significant(png_ptr->gamma) + && (png_gamma_significant(png_ptr->colorspace.gamma) || png_gamma_significant(png_ptr->screen_gamma) # ifdef PNG_READ_BACKGROUND_SUPPORTED || (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_UNIQUE && png_gamma_significant(png_ptr->background_gamma)) @@ -1575,10 +1610,10 @@ gs = PNG_FP_1; break; case PNG_BACKGROUND_GAMMA_FILE: - g = png_reciprocal(png_ptr->gamma); - gs = png_reciprocal2(png_ptr->gamma, + g = png_reciprocal(png_ptr->colorspace.gamma); + gs = png_reciprocal2(png_ptr->colorspace.gamma, png_ptr->screen_gamma); break; case PNG_BACKGROUND_GAMMA_UNIQUE: @@ -1684,10 +1719,11 @@ /* gs = PNG_FP_1; */ break; case PNG_BACKGROUND_GAMMA_FILE: - g = png_reciprocal(png_ptr->gamma); - gs = png_reciprocal2(png_ptr->gamma, png_ptr->screen_gamma); + g = png_reciprocal(png_ptr->colorspace.gamma); + gs = png_reciprocal2(png_ptr->colorspace.gamma, + png_ptr->screen_gamma); break; case PNG_BACKGROUND_GAMMA_UNIQUE: g = png_reciprocal(png_ptr->background_gamma); @@ -1769,10 +1805,10 @@ png_colorp palette = png_ptr->palette; int num_palette = png_ptr->num_palette; int i; - /*NOTE: there are other transformations that should probably be in here - * too. + /* NOTE: there are other transformations that should probably be in + * here too. */ for (i = 0; i < num_palette; i++) { palette[i].red = png_ptr->gamma_table[palette[i].red]; @@ -1876,9 +1912,9 @@ * info should be updated so a PNG file could be written with it, * assuming the transformations result in valid PNG data. */ void /* PRIVATE */ -png_read_transform_info(png_structp png_ptr, png_infop info_ptr) +png_read_transform_info(png_structrp png_ptr, png_inforp info_ptr) { png_debug(1, "in png_read_transform_info"); #ifdef PNG_READ_EXPAND_SUPPORTED @@ -1927,10 +1963,14 @@ /* The following used to be conditional on PNG_GAMMA (prior to 1.5.4), * however it seems that the code in png_init_read_transformations, which has * been called before this from png_read_update_info->png_read_start_row * sometimes does the gamma transform and cancels the flag. + * + * TODO: this looks wrong; the info_ptr should end up with a gamma equal to + * the screen_gamma value. The following probably results in weirdness if + * the info_ptr is used by the app after the rows have been read. */ - info_ptr->gamma = png_ptr->gamma; + info_ptr->colorspace.gamma = png_ptr->colorspace.gamma; #endif if (info_ptr->bit_depth == 16) { @@ -2076,9 +2116,9 @@ * and is very touchy. If you add a transformation, take care to * decide how it fits in with the other transformations here. */ void /* PRIVATE */ -png_do_read_transformations(png_structp png_ptr, png_row_infop row_info) +png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info) { png_debug(1, "in png_do_read_transformations"); if (png_ptr->row_buf == NULL) @@ -2091,10 +2131,11 @@ } /* The following is debugging; prior to 1.5.4 the code was never compiled in; * in 1.5.4 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro - * PNG_WARN_UNINITIALIZED_ROW removed. In 1.5 the new flag is set only for - * selected new APIs to ensure that there is no API change. + * PNG_WARN_UNINITIALIZED_ROW removed. In 1.6 the new flag is set only for + * all transformations, however in practice the ROW_INIT always gets done on + * demand, if necessary. */ if ((png_ptr->flags & PNG_FLAG_DETECT_UNINITIALIZED) != 0 && !(png_ptr->flags & PNG_FLAG_ROW_INIT)) { @@ -3222,9 +3263,9 @@ * calculated to make the sum 32768. This will result in different rounding * to that used above. */ int /* PRIVATE */ -png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) +png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row) { int rgb_error = 0; @@ -3482,9 +3523,9 @@ * "background" is already in the screen gamma, while "background_1" is * at a gamma of 1.0. Paletted files have already been taken care of. */ void /* PRIVATE */ -png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) +png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { #ifdef PNG_READ_GAMMA_SUPPORTED png_const_bytep gamma_table = png_ptr->gamma_table; png_const_bytep gamma_from_1 = png_ptr->gamma_from_1; @@ -3518,10 +3559,11 @@ { if ((png_uint_16)((*sp >> shift) & 0x01) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0x7f7f >> (7 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } if (!shift) { @@ -3546,19 +3588,21 @@ { if ((png_uint_16)((*sp >> shift) & 0x03) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0x3f3f >> (6 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } else { - png_byte p = (png_byte)((*sp >> shift) & 0x03); - png_byte g = (png_byte)((gamma_table [p | (p << 2) | - (p << 4) | (p << 6)] >> 6) & 0x03); - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(g << shift); + unsigned int p = (*sp >> shift) & 0x03; + unsigned int g = (gamma_table [p | (p << 2) | + (p << 4) | (p << 6)] >> 6) & 0x03; + unsigned int tmp = *sp & (0x3f3f >> (6 - shift)); + tmp |= g << shift; + *sp = (png_byte)(tmp & 0xff); } if (!shift) { @@ -3580,10 +3624,11 @@ { if ((png_uint_16)((*sp >> shift) & 0x03) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0x3f3f >> (6 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } if (!shift) { @@ -3609,19 +3654,21 @@ { if ((png_uint_16)((*sp >> shift) & 0x0f) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0xf0f >> (4 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } else { - png_byte p = (png_byte)((*sp >> shift) & 0x0f); - png_byte g = (png_byte)((gamma_table[p | - (p << 4)] >> 4) & 0x0f); - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(g << shift); + unsigned int p = (*sp >> shift) & 0x0f; + unsigned int g = (gamma_table[p | (p << 4)] >> 4) & + 0x0f; + unsigned int tmp = *sp & (0xf0f >> (4 - shift)); + tmp |= g << shift; + *sp = (png_byte)(tmp & 0xff); } if (!shift) { @@ -3643,10 +3690,11 @@ { if ((png_uint_16)((*sp >> shift) & 0x0f) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0xf0f >> (4 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } if (!shift) { @@ -4194,9 +4242,9 @@ * is 16, use gamma_16_table and gamma_shift. Build these with * build_gamma_table(). */ void /* PRIVATE */ -png_do_gamma(png_row_infop row_info, png_bytep row, png_structp png_ptr) +png_do_gamma(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { png_const_bytep gamma_table = png_ptr->gamma_table; png_const_uint_16pp gamma_16_table = png_ptr->gamma_16_table; int gamma_shift = png_ptr->gamma_shift; @@ -4395,9 +4443,9 @@ * linear.) Called only with color types that have an alpha channel. Needs the * from_1 tables. */ void /* PRIVATE */ -png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structp png_ptr) +png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { png_uint_32 row_width = row_info->width; png_debug(1, "in png_do_encode_alpha"); @@ -4627,17 +4675,17 @@ { if (row_info->color_type == PNG_COLOR_TYPE_GRAY) { - png_uint_16 gray = (png_uint_16)(trans_color ? trans_color->gray : 0); + unsigned int gray = trans_color ? trans_color->gray : 0; if (row_info->bit_depth < 8) { switch (row_info->bit_depth) { case 1: { - gray = (png_uint_16)((gray & 0x01) * 0xff); + gray = (gray & 0x01) * 0xff; sp = row + (png_size_t)((row_width - 1) >> 3); dp = row + (png_size_t)row_width - 1; shift = 7 - (int)((row_width + 7) & 0x07); for (i = 0; i < row_width; i++) @@ -4663,9 +4711,9 @@ } case 2: { - gray = (png_uint_16)((gray & 0x03) * 0x55); + gray = (gray & 0x03) * 0x55; sp = row + (png_size_t)((row_width - 1) >> 2); dp = row + (png_size_t)row_width - 1; shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); for (i = 0; i < row_width; i++) @@ -4688,9 +4736,9 @@ } case 4: { - gray = (png_uint_16)((gray & 0x0f) * 0x11); + gray = (gray & 0x0f) * 0x11; sp = row + (png_size_t)((row_width - 1) >> 1); dp = row + (png_size_t)row_width - 1; shift = (int)((1 - ((row_width + 1) & 0x01)) << 2); for (i = 0; i < row_width; i++) @@ -4741,10 +4789,10 @@ } else if (row_info->bit_depth == 16) { - png_byte gray_high = (png_byte)((gray >> 8) & 0xff); - png_byte gray_low = (png_byte)(gray & 0xff); + unsigned int gray_high = (gray >> 8) & 0xff; + unsigned int gray_low = gray & 0xff; sp = row + row_info->rowbytes - 1; dp = row + (row_info->rowbytes << 1) - 1; for (i = 0; i < row_width; i++) { diff -ru4NwbB libpng-1.5.10/pngrutil.c libpng-1.6.0beta22/pngrutil.c --- libpng-1.5.10/pngrutil.c 2012-03-29 00:06:54.628335185 -0500 +++ libpng-1.6.0beta22/pngrutil.c 2012-05-23 12:30:56.187519714 -0500 @@ -1,8 +1,8 @@ /* pngrutil.c - utilities to read a PNG file * - * Last changed in libpng 1.5.10 [March 8, 2012] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -20,9 +20,9 @@ #define png_strtod(p,a,b) strtod(a,b) png_uint_32 PNGAPI -png_get_uint_31(png_structp png_ptr, png_const_bytep buf) +png_get_uint_31(png_const_structrp png_ptr, png_const_bytep buf) { png_uint_32 uval = png_get_uint_32(buf); if (uval > PNG_UINT_31_MAX) @@ -39,9 +39,9 @@ */ #define PNG_FIXED_ERROR (-1) static png_fixed_point /* PRIVATE */ -png_get_fixed_point(png_structp png_ptr, png_const_bytep buf) +png_get_fixed_point(png_structrp png_ptr, png_const_bytep buf) { png_uint_32 uval = png_get_uint_32(buf); if (uval <= PNG_UINT_31_MAX) @@ -113,9 +113,9 @@ #endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */ /* Read and check the PNG file signature */ void /* PRIVATE */ -png_read_sig(png_structp png_ptr, png_infop info_ptr) +png_read_sig(png_structrp png_ptr, png_inforp info_ptr) { png_size_t num_checked, num_to_check; /* Exit if the user application does not expect a signature. */ @@ -148,9 +148,9 @@ /* Read the chunk header (length + type name). * Put the type name into png_ptr->chunk_name, and return the length. */ png_uint_32 /* PRIVATE */ -png_read_chunk_header(png_structp png_ptr) +png_read_chunk_header(png_structrp png_ptr) { png_byte buf[8]; png_uint_32 length; @@ -185,9 +185,9 @@ } /* Read data, and (optionally) run it through the CRC. */ void /* PRIVATE */ -png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length) +png_crc_read(png_structrp png_ptr, png_bytep buf, png_uint_32 length) { if (png_ptr == NULL) return; @@ -200,21 +200,24 @@ * things up, we may calculate the CRC on the data and print a message. * Returns '1' if there was a CRC error, '0' otherwise. */ int /* PRIVATE */ -png_crc_finish(png_structp png_ptr, png_uint_32 skip) +png_crc_finish(png_structrp png_ptr, png_uint_32 skip) { - png_size_t i; - png_size_t istop = png_ptr->zbuf_size; - - for (i = (png_size_t)skip; i > istop; i -= istop) + /* The size of the local buffer for inflate is a good guess as to a + * reasonable size to use for buffering reads from the application. + */ + while (skip > 0) { - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - } + png_uint_32 len; + png_byte tmpbuf[PNG_INFLATE_BUF_SIZE]; - if (i) - { - png_crc_read(png_ptr, png_ptr->zbuf, i); + len = sizeof tmpbuf; + if (len > skip) + len = skip; + skip -= len; + + png_crc_read(png_ptr, tmpbuf, len); } if (png_crc_error(png_ptr)) { @@ -240,9 +243,9 @@ /* Compare the CRC stored in the PNG file with that calculated by libpng from * the data it has read thus far. */ int /* PRIVATE */ -png_crc_error(png_structp png_ptr) +png_crc_error(png_structrp png_ptr) { png_byte crc_bytes[4]; png_uint_32 crc; int need_crc = 1; @@ -276,250 +279,502 @@ else return (0); } -#ifdef PNG_READ_COMPRESSED_TEXT_SUPPORTED -static png_size_t -png_inflate(png_structp png_ptr, png_bytep data, png_size_t size, - png_bytep output, png_size_t output_size) -{ - png_size_t count = 0; - - /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't - * even necessarily handle 65536 bytes) because the type uInt is "16 bits or - * more". Consequently it is necessary to chunk the input to zlib. This - * code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the maximum value - * that can be stored in a uInt.) It is possible to set ZLIB_IO_MAX to a - * lower value in pngpriv.h and this may sometimes have a performance - * advantage, because it forces access of the input data to be separated from - * at least some of the use by some period of time. +/* Manage the read buffer; this simply reallocates the buffer if it is not small + * enough (or if it is not allocated). The routine returns a pointer to the + * buffer, if an error occurs and 'warn' is set the routine returns NULL, else + * it will call png_error (via png_malloc) on failure. (warn == 2 means + * 'silent'). */ - png_ptr->zstream.next_in = data; - /* avail_in is set below from 'size' */ - png_ptr->zstream.avail_in = 0; +static png_bytep +png_read_buffer(png_structrp png_ptr, png_alloc_size_t new_size, int warn) +{ + png_bytep buffer = png_ptr->read_buffer; - while (1) + if (buffer != NULL && new_size > png_ptr->read_buffer_size) { - int ret, avail; + png_ptr->read_buffer = NULL; + png_ptr->read_buffer = NULL; + png_ptr->read_buffer_size = 0; + png_free(png_ptr, buffer); + buffer = NULL; + } - /* The setting of 'avail_in' used to be outside the loop; by setting it - * inside it is possible to chunk the input to zlib and simply rely on - * zlib to advance the 'next_in' pointer. This allows arbitrary amounts o - * data to be passed through zlib at the unavoidable cost of requiring a - * window save (memcpy of up to 32768 output bytes) every ZLIB_IO_MAX - * input bytes. - */ - if (png_ptr->zstream.avail_in == 0 && size > 0) + if (buffer == NULL) { - if (size <= ZLIB_IO_MAX) + buffer = png_voidcast(png_bytep, png_malloc_base(png_ptr, new_size)); + + if (buffer != NULL) { - /* The value is less than ZLIB_IO_MAX so the cast is safe: */ - png_ptr->zstream.avail_in = (uInt)size; - size = 0; + png_ptr->read_buffer = buffer; + png_ptr->read_buffer_size = new_size; } - else + else if (warn < 2) /* else silent */ { - png_ptr->zstream.avail_in = ZLIB_IO_MAX; - size -= ZLIB_IO_MAX; + (warn ? png_chunk_warning : png_chunk_error)(png_ptr, + "insufficient memory to read chunk"); + } } + + return buffer; } - /* Reset the output buffer each time round - we empty it - * after every inflate call. +/* png_inflate_claim: claim the zstream for some nefarious purpose that involves + * decompression. Returns Z_OK on success, else a zlib error code. It checks + * the owner but, in final release builds, just issues a warning if some other + * chunk apparently owns the stream. Prior to release it does a png_error. */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = png_ptr->zbuf_size; +static int +png_inflate_claim(png_structrp png_ptr, png_uint_32 owner, int window_bits) +{ + if (png_ptr->zowner != 0) + { + char msg[64]; - ret = inflate(&png_ptr->zstream, Z_NO_FLUSH); - avail = png_ptr->zbuf_size - png_ptr->zstream.avail_out; + PNG_STRING_FROM_CHUNK(msg, png_ptr->zowner); + /* So the message that results is " using zstream"; this is an + * internal error, but is very useful for debugging. i18n requirements + * are minimal. + */ + (void)png_safecat(msg, sizeof msg, 4, " using zstream"); +# if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC + png_chunk_warning(png_ptr, msg); + png_ptr->zowner = 0; +# else + png_chunk_error(png_ptr, msg); +# endif + } - /* First copy/count any new output - but only if we didn't - * get an error code. + /* Implementation note: unlike 'png_deflate_claim' this internal function + * does not take the size of the data as an argument. Some efficiency could + * be gained by using this when it is known *if* the zlib stream itself does + * not record the number, however this is a chimera: the original writer of + * the PNG may have selected a lower window size, and we really must follow + * that because, for systems with with limited capabilities, we would + * otherwise reject the applications attempts to use a smaller window size. + * (zlib doesn't have an interface to say "this or lower"!) + * + * inflateReset2 was added to zlib 1.2.4; before this the window could not be + * reset, therefore it is necessary to always allocate the maximum window + * size with earlier zlibs just in case later compressed chunks need it. + */ + { + int ret; /* zlib return code */ + + /* Set this for safety, just in case the previous owner left pointers to + * memory allocations. */ - if ((ret == Z_OK || ret == Z_STREAM_END) && avail > 0) + png_ptr->zstream.next_in = NULL; + png_ptr->zstream.avail_in = 0; + png_ptr->zstream.next_out = NULL; + png_ptr->zstream.avail_out = 0; + + if (png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) { - png_size_t space = avail; /* > 0, see above */ +# if ZLIB_VERNUM < 0x1240 + PNG_UNUSED(window_bits) + ret = inflateReset(&png_ptr->zstream); +# else + ret = inflateReset2(&png_ptr->zstream, window_bits); +# endif + } - if (output != 0 && output_size > count) + else { - png_size_t copy = output_size - count; +# if ZLIB_VERNUM < 0x1240 + ret = inflateInit(&png_ptr->zstream); +# else + ret = inflateInit2(&png_ptr->zstream, window_bits); +# endif + + if (ret == Z_OK) + png_ptr->flags |= PNG_FLAG_ZSTREAM_INITIALIZED; + } + + if (ret == Z_OK) + png_ptr->zowner = owner; - if (space < copy) - copy = space; + else + png_zstream_error(png_ptr, ret); - png_memcpy(output + count, png_ptr->zbuf, copy); + return ret; } - count += space; } - if (ret == Z_OK) - continue; +#ifdef PNG_READ_COMPRESSED_TEXT_SUPPORTED +/* png_inflate now returns zlib error codes including Z_OK and Z_STREAM_END to + * allow the caller to do multiple calls if required. If the 'finish' flag is + * set Z_FINISH will be passed to the final inflate() call and Z_STREAM_END must + * be returned or there has been a problem, otherwise Z_SYNC_FLUSH is used and + * Z_OK or Z_STREAM_END will be returned on success. + * + * The input and output sizes are updated to the actual amounts of data consumed + * or written, not the amount available (as in a z_stream). The data pointers + * are not changed, so the next input is (data+input_size) and the next + * available output is (output+output_size). + */ +static int +png_inflate(png_structrp png_ptr, png_uint_32 owner, int finish, + /* INPUT: */ png_const_bytep input, png_uint_32p input_size_ptr, + /* OUTPUT: */ png_bytep output, png_alloc_size_t *output_size_ptr) +{ + if (png_ptr->zowner == owner) /* Else not claimed */ + { + int ret; + png_alloc_size_t avail_out = *output_size_ptr; + png_uint_32 avail_in = *input_size_ptr; - /* Termination conditions - always reset the zstream, it - * must be left in inflateInit state. + /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it + * can't even necessarily handle 65536 bytes) because the type uInt is + * "16 bits or more". Consequently it is necessary to chunk the input to + * zlib. This code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the + * maximum value that can be stored in a uInt.) It is possible to set + * ZLIB_IO_MAX to a lower value in pngpriv.h and this may sometimes have + * a performance advantage, because it reduces the amount of data accessed + * at each step and that may give the OS more time to page it in. */ + png_ptr->zstream.next_in = PNGZ_INPUT_CAST(input); + /* avail_in and avail_out are set below from 'size' */ png_ptr->zstream.avail_in = 0; - inflateReset(&png_ptr->zstream); - - if (ret == Z_STREAM_END) - return count; /* NOTE: may be zero. */ + png_ptr->zstream.avail_out = 0; - /* Now handle the error codes - the API always returns 0 - * and the error message is dumped into the uncompressed - * buffer if available. + /* Read directly into the output if it is available (this is set to + * a local buffer below if output is NULL). */ -# ifdef PNG_WARNINGS_SUPPORTED + if (output != NULL) + png_ptr->zstream.next_out = output; + + do { - png_const_charp msg; + uInt avail; + Byte local_buffer[PNG_INFLATE_BUF_SIZE]; - if (png_ptr->zstream.msg != 0) - msg = png_ptr->zstream.msg; + /* zlib INPUT BUFFER */ + /* The setting of 'avail_in' used to be outside the loop; by setting it + * inside it is possible to chunk the input to zlib and simply rely on + * zlib to advance the 'next_in' pointer. This allows arbitrary + * amounts of data to be passed through zlib at the unavoidable cost of + * requiring a window save (png_memcpy of up to 32768 output bytes) + * every ZLIB_IO_MAX input bytes. + */ + avail_in += png_ptr->zstream.avail_in; /* not consumed last time */ - else switch (ret) - { - case Z_BUF_ERROR: - msg = "Buffer error in compressed datastream"; - break; + avail = ZLIB_IO_MAX; - case Z_DATA_ERROR: - msg = "Data error in compressed datastream"; - break; + if (avail_in < avail) + avail = (uInt)avail_in; /* safe: < than ZLIB_IO_MAX */ - default: - msg = "Incomplete compressed datastream"; - break; + avail_in -= avail; + png_ptr->zstream.avail_in = avail; + + /* zlib OUTPUT BUFFER */ + avail_out += png_ptr->zstream.avail_out; /* not written last time */ + + avail = ZLIB_IO_MAX; /* maximum zlib can process */ + + if (output == NULL) + { + /* Reset the output buffer each time round if output is NULL and + * make available the full buffer, up to 'remaining_space' + */ + png_ptr->zstream.next_out = local_buffer; + if (sizeof local_buffer < avail) + avail = sizeof local_buffer; } - png_chunk_warning(png_ptr, msg); + if (avail_out < avail) + avail = (uInt)avail_out; /* safe: < ZLIB_IO_MAX */ + + png_ptr->zstream.avail_out = avail; + avail_out -= avail; + + /* zlib inflate call */ + /* In fact 'avail_out' may be 0 at this point, that happens at the end + * of the read when the final LZ end code was not passed at the end of + * the previous chunk of input data. Tell zlib if we have reached the + * end of the output buffer. + */ + ret = inflate(&png_ptr->zstream, avail_out > 0 ? Z_NO_FLUSH : + (finish ? Z_FINISH : Z_SYNC_FLUSH)); + } while (ret == Z_OK); + + /* For safety kill the local buffer pointer now */ + if (output == NULL) + png_ptr->zstream.next_out = NULL; + + /* Claw back the 'size' and 'remaining_space' byte counts. */ + avail_in += png_ptr->zstream.avail_in; + avail_out += png_ptr->zstream.avail_out; + + /* Update the input and output sizes; the updated values are the amount + * consumed or written, effectively the inverse of what zlib uses. + */ + if (avail_out > 0) + *output_size_ptr -= avail_out; + + if (avail_in > 0) + *input_size_ptr -= avail_in; + + /* Ensure png_ptr->zstream.msg is set (even in the success case!) */ + png_zstream_error(png_ptr, ret); + return ret; } -# endif - /* 0 means an error - notice that this code simply ignores - * zero length compressed chunks as a result. + else + { + /* This is a bad internal error. The recovery assigns to the zstream msg + * pointer, which is not owned by the caller, but this is safe; it's only + * used on errors! */ - return 0; + png_ptr->zstream.msg = PNGZ_MSG_CAST("zstream unclaimed"); + return Z_STREAM_ERROR; } } /* - * Decompress trailing data in a chunk. The assumption is that chunkdata + * Decompress trailing data in a chunk. The assumption is that read_buffer * points at an allocated area holding the contents of a chunk with a * trailing compressed part. What we get back is an allocated area * holding the original prefix part and an uncompressed version of the * trailing part (the malloc area passed in is freed). */ -void /* PRIVATE */ -png_decompress_chunk(png_structp png_ptr, int comp_type, - png_size_t chunklength, - png_size_t prefix_size, png_size_t *newlength) +static int +png_decompress_chunk(png_structrp png_ptr, + png_uint_32 chunklength, png_uint_32 prefix_size, + png_alloc_size_t *newlength /* must be initialized to the maximum! */, + int terminate /*add a '\0' to the end of the uncompressed data*/) { - /* The caller should guarantee this */ - if (prefix_size > chunklength) - { - /* The recovery is to delete the chunk. */ - png_warning(png_ptr, "invalid chunklength"); - prefix_size = 0; /* To delete everything */ - } + /* TODO: implement different limits for different types of chunk. + * + * The caller supplies *newlength set to the maximum length of the + * uncompressed data, but this routine allocates space for the prefix and + * maybe a '\0' terminator too. We have to assume that 'prefix_size' is + * limited only by the maximum chunk size. + */ + png_alloc_size_t limit = PNG_SIZE_MAX; + +# ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED + if (png_ptr->user_chunk_malloc_max > 0 && + png_ptr->user_chunk_malloc_max < limit) + limit = png_ptr->user_chunk_malloc_max; +# elif PNG_USER_CHUNK_MALLOC_MAX > 0 + if (PNG_USER_CHUNK_MALLOC_MAX < limit) + limit = PNG_USER_CHUNK_MALLOC_MAX; +# endif - else if (comp_type == PNG_COMPRESSION_TYPE_BASE) + if (limit >= prefix_size + (terminate != 0)) { - png_size_t expanded_size = png_inflate(png_ptr, - (png_bytep)(png_ptr->chunkdata + prefix_size), - chunklength - prefix_size, - 0, /* output */ - 0); /* output size */ + int ret; + + limit -= prefix_size + (terminate != 0); - /* Now check the limits on this chunk - if the limit fails the - * compressed data will be removed, the prefix will remain. + if (limit < *newlength) + *newlength = limit; + + /* Now try to claim the stream; the 'warn' setting causes zlib to be told + * to use the maximum window size during inflate; this hides errors in the + * deflate header window bits value which is used if '0' is passed. In + * fact this only has an effect with zlib versions 1.2.4 and later - see + * the comments in png_inflate_claim above. */ - if (prefix_size >= (~(png_size_t)0) - 1 || - expanded_size >= (~(png_size_t)0) - 1 - prefix_size -#ifdef PNG_USER_LIMITS_SUPPORTED - || (png_ptr->user_chunk_malloc_max && - (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1)) -#else - || ((PNG_USER_CHUNK_MALLOC_MAX > 0) && - prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1) -#endif - ) - png_warning(png_ptr, "Exceeded size limit while expanding chunk"); + ret = png_inflate_claim(png_ptr, png_ptr->chunk_name, + png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN ? 15 : 0); + + if (ret == Z_OK) + { + png_uint_32 lzsize = chunklength - prefix_size; + + ret = png_inflate(png_ptr, png_ptr->chunk_name, 1/*finish*/, + /* input: */ png_ptr->read_buffer + prefix_size, &lzsize, + /* output: */ NULL, newlength); - /* If the size is zero either there was an error and a message - * has already been output (warning) or the size really is zero - * and we have nothing to do - the code will exit through the - * error case below. - */ - else if (expanded_size > 0) - { - /* Success (maybe) - really uncompress the chunk. */ - png_size_t new_size = 0; - png_charp text = (png_charp)png_malloc_warn(png_ptr, - prefix_size + expanded_size + 1); + if (ret == Z_STREAM_END) + { + /* Use 'inflateReset' here, not 'inflateReset2' because this + * preserves the previously decided window size (otherwise it would + * be necessary to store the previous window size.) In practice + * this doesn't matter anyway, because png_inflate will call inflate + * with Z_FINISH in almost all cases, so the window will not be + * maintained. + */ + if (inflateReset(&png_ptr->zstream) == Z_OK) + { + /* Because of the limit checks above we know that the new, + * expanded, size will fit in a size_t (let alone an + * png_alloc_size_t). Use png_malloc_base here to avoid an + * extra OOM message. + */ + png_alloc_size_t new_size = *newlength; + png_alloc_size_t buffer_size = prefix_size + new_size + + (terminate != 0); + png_bytep text = png_voidcast(png_bytep, png_malloc_base(png_ptr, + buffer_size)); if (text != NULL) { - png_memcpy(text, png_ptr->chunkdata, prefix_size); - new_size = png_inflate(png_ptr, - (png_bytep)(png_ptr->chunkdata + prefix_size), - chunklength - prefix_size, - (png_bytep)(text + prefix_size), expanded_size); - text[prefix_size + expanded_size] = 0; /* just in case */ - - if (new_size == expanded_size) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = text; - *newlength = prefix_size + expanded_size; - return; /* The success return! */ + ret = png_inflate(png_ptr, png_ptr->chunk_name, 1/*finish*/, + png_ptr->read_buffer + prefix_size, &lzsize, + text + prefix_size, newlength); + + if (ret == Z_STREAM_END) + { + if (new_size == *newlength) + { + if (terminate) + text[prefix_size + *newlength] = 0; + + if (prefix_size > 0) + png_memcpy(text, png_ptr->read_buffer, prefix_size); + + { + png_bytep old_ptr = png_ptr->read_buffer; + + png_ptr->read_buffer = text; + png_ptr->read_buffer_size = buffer_size; + text = old_ptr; /* freed below */ + } } - png_warning(png_ptr, "png_inflate logic error"); + else + { + /* The size changed on the second read, there can be no + * guarantee that anything is correct at this point. + * The 'msg' pointer has been set to "unexpected end of + * LZ stream", which is fine, but return an error code + * that the caller won't accept. + */ + ret = PNG_UNEXPECTED_ZLIB_RETURN; + } + } + + else if (ret == Z_OK) + ret = PNG_UNEXPECTED_ZLIB_RETURN; /* for safety */ + + /* Free the text pointer (this is the old read_buffer on + * success) + */ png_free(png_ptr, text); + + /* This really is very benign, but it's still an error because + * the extra space may otherwise be used as a Trojan Horse. + */ + if (ret == Z_STREAM_END && + chunklength - prefix_size != lzsize) + png_chunk_benign_error(png_ptr, "extra compressed data"); } else - png_warning(png_ptr, "Not enough memory to decompress chunk"); + { + /* Out of memory allocating the buffer */ + ret = Z_MEM_ERROR; + png_zstream_error(png_ptr, Z_MEM_ERROR); } } - else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */ + else { - PNG_WARNING_PARAMETERS(p) - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, comp_type); - png_formatted_warning(png_ptr, p, "Unknown compression type @1"); + /* inflateReset failed, store the error message */ + png_zstream_error(png_ptr, ret); - /* The recovery is to simply drop the data. */ + if (ret == Z_STREAM_END) + ret = PNG_UNEXPECTED_ZLIB_RETURN; } + } + + else if (ret == Z_OK) + ret = PNG_UNEXPECTED_ZLIB_RETURN; + + /* Release the claimed stream */ + png_ptr->zowner = 0; + } + + else /* the claim failed */ if (ret == Z_STREAM_END) /* impossible! */ + ret = PNG_UNEXPECTED_ZLIB_RETURN; + + return ret; + } + + else + { + /* Application/configuration limits exceeded */ + png_zstream_error(png_ptr, Z_MEM_ERROR); + return Z_MEM_ERROR; + } +} +#endif /* PNG_READ_COMPRESSED_TEXT_SUPPORTED */ - /* Generic error return - leave the prefix, delete the compressed - * data, reallocate the chunkdata to remove the potentially large - * amount of compressed data. +#ifdef PNG_READ_iCCP_SUPPORTED +/* Perform a partial read and decompress, producing 'avail_out' bytes and + * reading from the current chunk as required. */ +static int +png_inflate_read(png_structrp png_ptr, png_bytep read_buffer, uInt read_size, + png_uint_32p chunk_bytes, png_bytep next_out, png_alloc_size_t *out_size, + int finish) +{ + if (png_ptr->zowner == png_ptr->chunk_name) { - png_charp text = (png_charp)png_malloc_warn(png_ptr, prefix_size + 1); + int ret; - if (text != NULL) + /* next_in and avail_in must have been initialized by the caller. */ + png_ptr->zstream.next_out = next_out; + png_ptr->zstream.avail_out = 0; /* set in the loop */ + + do { - if (prefix_size > 0) - png_memcpy(text, png_ptr->chunkdata, prefix_size); + if (png_ptr->zstream.avail_in == 0) + { + if (read_size > *chunk_bytes) + read_size = (uInt)*chunk_bytes; + *chunk_bytes -= read_size; + + if (read_size > 0) + png_crc_read(png_ptr, read_buffer, read_size); + + png_ptr->zstream.next_in = read_buffer; + png_ptr->zstream.avail_in = read_size; + } - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = text; + if (png_ptr->zstream.avail_out == 0) + { + uInt avail = ZLIB_IO_MAX; + if (avail > *out_size) + avail = (uInt)*out_size; + *out_size -= avail; - /* This is an extra zero in the 'uncompressed' part. */ - *(png_ptr->chunkdata + prefix_size) = 0x00; + png_ptr->zstream.avail_out = avail; } - /* Ignore a malloc error here - it is safe. */ + + /* Use Z_SYNC_FLUSH when there is no more chunk data to ensure that all + * the available output is produced; this allows reading of truncated + * streams. + */ + ret = inflate(&png_ptr->zstream, + *chunk_bytes > 0 ? Z_NO_FLUSH : (finish ? Z_FINISH : Z_SYNC_FLUSH)); } + while (ret == Z_OK && (*out_size > 0 || png_ptr->zstream.avail_out > 0)); + + *out_size += png_ptr->zstream.avail_out; + png_ptr->zstream.avail_out = 0; /* Should not be required, but is safe */ - *newlength = prefix_size; + /* Ensure the error message pointer is always set: */ + png_zstream_error(png_ptr, ret); + return ret; } -#endif /* PNG_READ_COMPRESSED_TEXT_SUPPORTED */ + + else + { + png_ptr->zstream.msg = PNGZ_MSG_CAST("zstream unclaimed"); + return Z_STREAM_ERROR; + } +} +#endif /* Read and check the IDHR chunk */ void /* PRIVATE */ -png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_IHDR(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[13]; png_uint_32 width, height; int bit_depth, color_type, compression_type, filter_type; @@ -527,13 +782,13 @@ png_debug(1, "in png_handle_IHDR"); if (png_ptr->mode & PNG_HAVE_IHDR) - png_error(png_ptr, "Out of place IHDR"); + png_chunk_error(png_ptr, "out of place"); /* Check the length */ if (length != 13) - png_error(png_ptr, "Invalid IHDR chunk"); + png_chunk_error(png_ptr, "invalid"); png_ptr->mode |= PNG_HAVE_IHDR; png_crc_read(png_ptr, buf, 13); @@ -592,9 +847,9 @@ } /* Read and check the palette */ void /* PRIVATE */ -png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_PLTE(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_color palette[PNG_MAX_PALETTE_LENGTH]; int num, i; #ifdef PNG_POINTER_INDEXING_SUPPORTED @@ -603,27 +858,34 @@ png_debug(1, "in png_handle_PLTE"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before PLTE"); + png_chunk_error(png_ptr, "missing IHDR"); + + /* Moved to before the 'after IDAT' check below because otherwise duplicate + * PLTE chunks are potentially ignored (the spec says there shall not be more + * than one PLTE, the error is not treated as benign, so this check trumps + * the requirement that PLTE appears before IDAT.) + */ + else if (png_ptr->mode & PNG_HAVE_PLTE) + png_chunk_error(png_ptr, "duplicate"); else if (png_ptr->mode & PNG_HAVE_IDAT) { - png_warning(png_ptr, "Invalid PLTE after IDAT"); + /* This is benign because the non-benign error happened before, when an + * IDAT was encountered in a color-mapped image with no PLTE. + */ png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (png_ptr->mode & PNG_HAVE_PLTE) - png_error(png_ptr, "Duplicate PLTE chunk"); - png_ptr->mode |= PNG_HAVE_PLTE; if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR)) { - png_warning(png_ptr, - "Ignoring PLTE chunk in grayscale PNG"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "ignored in grayscale PNG"); return; } #ifndef PNG_READ_OPT_PLTE_SUPPORTED @@ -635,21 +897,20 @@ #endif if (length > 3*PNG_MAX_PALETTE_LENGTH || length % 3) { - if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) - { - png_warning(png_ptr, "Invalid palette chunk"); png_crc_finish(png_ptr, length); - return; - } + + if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) + png_chunk_benign_error(png_ptr, "invalid"); else - { - png_error(png_ptr, "Invalid palette chunk"); - } + png_chunk_error(png_ptr, "invalid"); + + return; } + /* The cast is safe because 'length' is less than 3*PNG_MAX_PALETTE_LENGTH */ num = (int)length / 3; #ifdef PNG_POINTER_INDEXING_SUPPORTED for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++) @@ -692,8 +953,12 @@ /* If we don't want to use the data from an ancillary chunk, * we have two options: an error abort, or a warning and we * ignore the data in this chunk (which should be OK, since * it's considered ancillary for a RGB or RGBA image). + * + * IMPLEMENTATION NOTE: this is only here because png_crc_finish uses the + * chunk type to determine whether to check the ancillary or the critical + * flags. */ if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE)) { if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) @@ -715,92 +980,96 @@ } } #endif + /* TODO: png_set_PLTE has the side effect of setting png_ptr->palette to its + * own copy of the palette. This has the side effect that when png_start_row + * is called (this happens after any call to png_read_update_info) the + * info_ptr palette gets changed. This is extremely unexpected and + * confusing. + * + * Fix this by not sharing the palette in this way. + */ png_set_PLTE(png_ptr, info_ptr, palette, num); + /* The three chunks, bKGD, hIST and tRNS *must* appear after PLTE and before + * IDAT. Prior to 1.6.0 this was not checked; instead the code merely + * checked the apparent validity of a tRNS chunk inserted before PLTE on a + * palette PNG. 1.6.0 attempts to rigorously follow the standard and + * therefore does a benign error if the erroneous condition is detected *and* + * cancels the tRNS if the benign error returns. The alternative is to + * amend the standard since it would be rather hypocritical of the standards + * maintainers to ignore it. + */ #ifdef PNG_READ_tRNS_SUPPORTED - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) - { - if (png_ptr->num_trans > (png_uint_16)num) + if (png_ptr->num_trans > 0 || + (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS) != 0)) { - png_warning(png_ptr, "Truncating incorrect tRNS chunk length"); - png_ptr->num_trans = (png_uint_16)num; - } + /* Cancel this because otherwise it would be used if the transforms + * require it. Don't cancel the 'valid' flag because this would prevent + * detection of duplicate chunks. + */ + png_ptr->num_trans = 0; - if (info_ptr->num_trans > (png_uint_16)num) - { - png_warning(png_ptr, "Truncating incorrect info tRNS chunk length"); - info_ptr->num_trans = (png_uint_16)num; - } - } + if (info_ptr != NULL) + info_ptr->num_trans = 0; + + png_chunk_benign_error(png_ptr, "tRNS must be after"); } #endif +#ifdef PNG_READ_hIST_SUPPORTED + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) != 0) + png_chunk_benign_error(png_ptr, "hIST must be after"); +#endif + +#ifdef PNG_READ_bKGD_SUPPORTED + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) != 0) + png_chunk_benign_error(png_ptr, "bKGD must be after"); +#endif } void /* PRIVATE */ -png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_IEND(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_debug(1, "in png_handle_IEND"); if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT)) - { - png_error(png_ptr, "No image in file"); - } + png_chunk_error(png_ptr, "out of place"); png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND); - if (length != 0) - { - png_warning(png_ptr, "Incorrect IEND chunk length"); - } - png_crc_finish(png_ptr, length); - PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ + if (length != 0) + png_chunk_benign_error(png_ptr, "invalid"); + + PNG_UNUSED(info_ptr) } #ifdef PNG_READ_gAMA_SUPPORTED void /* PRIVATE */ -png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_gAMA(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_fixed_point igamma; png_byte buf[4]; png_debug(1, "in png_handle_gAMA"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before gAMA"); + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if (png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) { - png_warning(png_ptr, "Invalid gAMA after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place gAMA chunk"); - - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) -#ifdef PNG_READ_sRGB_SUPPORTED - && !(info_ptr->valid & PNG_INFO_sRGB) -#endif - ) - { - png_warning(png_ptr, "Duplicate gAMA chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } if (length != 4) { - png_warning(png_ptr, "Incorrect gAMA chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 4); @@ -809,83 +1078,74 @@ return; igamma = png_get_fixed_point(NULL, buf); - /* Check for zero gamma or an error. */ + /* The gAMA value is unsigned (and is a power law correction, so 0 is + * meaningless.) + */ if (igamma <= 0) { - png_warning(png_ptr, - "Ignoring gAMA chunk with out of range gamma"); - + png_chunk_benign_error(png_ptr, "out of range"); return; } -# ifdef PNG_READ_sRGB_SUPPORTED - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) - { - if (PNG_OUT_OF_RANGE(igamma, 45500, 500)) + /* If a colorspace error has already been output skip this chunk */ + if (png_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) + return; + + if (png_ptr->colorspace.flags & PNG_COLORSPACE_FROM_gAMA) { - PNG_WARNING_PARAMETERS(p) - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, igamma); - png_formatted_warning(png_ptr, p, - "Ignoring incorrect gAMA value @1 when sRGB is also present"); + png_ptr->colorspace.flags |= PNG_COLORSPACE_INVALID; + png_colorspace_sync(png_ptr, info_ptr); + + png_chunk_benign_error(png_ptr, "duplicate"); return; } - } -# endif /* PNG_READ_sRGB_SUPPORTED */ -# ifdef PNG_READ_GAMMA_SUPPORTED - /* Gamma correction on read is supported. */ - png_ptr->gamma = igamma; -# endif - /* And set the 'info' structure members. */ - png_set_gAMA_fixed(png_ptr, info_ptr, igamma); + png_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_gAMA; + (void)png_colorspace_set_gamma(png_ptr, &png_ptr->colorspace, igamma, + 1/*prefer gAMA values*/); + png_colorspace_sync(png_ptr, info_ptr); } #endif #ifdef PNG_READ_sBIT_SUPPORTED void /* PRIVATE */ -png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_sBIT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_size_t truelen; + unsigned int truelen; png_byte buf[4]; png_debug(1, "in png_handle_sBIT"); buf[0] = buf[1] = buf[2] = buf[3] = 0; if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sBIT"); + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if (png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) { - png_warning(png_ptr, "Invalid sBIT after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (png_ptr->mode & PNG_HAVE_PLTE) - { - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sBIT chunk"); - } - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)) { - png_warning(png_ptr, "Duplicate sBIT chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) truelen = 3; else - truelen = (png_size_t)png_ptr->channels; + truelen = png_ptr->channels; if (length != truelen || length > 4) { - png_warning(png_ptr, "Incorrect sBIT chunk length"); + png_chunk_benign_error(png_ptr, "invalid"); png_crc_finish(png_ptr, length); return; } @@ -916,469 +1176,436 @@ #endif #ifdef PNG_READ_cHRM_SUPPORTED void /* PRIVATE */ -png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_cHRM(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[32]; - png_fixed_point x_white, y_white, x_red, y_red, x_green, y_green, x_blue, - y_blue; + png_xy xy; png_debug(1, "in png_handle_cHRM"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before cHRM"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid cHRM after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place cHRM chunk"); + png_chunk_error(png_ptr, "missing IHDR"); - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM) -# ifdef PNG_READ_sRGB_SUPPORTED - && !(info_ptr->valid & PNG_INFO_sRGB) -# endif - ) + else if (png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) { - png_warning(png_ptr, "Duplicate cHRM chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } if (length != 32) { - png_warning(png_ptr, "Incorrect cHRM chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 32); if (png_crc_finish(png_ptr, 0)) return; - x_white = png_get_fixed_point(NULL, buf); - y_white = png_get_fixed_point(NULL, buf + 4); - x_red = png_get_fixed_point(NULL, buf + 8); - y_red = png_get_fixed_point(NULL, buf + 12); - x_green = png_get_fixed_point(NULL, buf + 16); - y_green = png_get_fixed_point(NULL, buf + 20); - x_blue = png_get_fixed_point(NULL, buf + 24); - y_blue = png_get_fixed_point(NULL, buf + 28); - - if (x_white == PNG_FIXED_ERROR || - y_white == PNG_FIXED_ERROR || - x_red == PNG_FIXED_ERROR || - y_red == PNG_FIXED_ERROR || - x_green == PNG_FIXED_ERROR || - y_green == PNG_FIXED_ERROR || - x_blue == PNG_FIXED_ERROR || - y_blue == PNG_FIXED_ERROR) - { - png_warning(png_ptr, "Ignoring cHRM chunk with negative chromaticities"); - return; - } + xy.whitex = png_get_fixed_point(NULL, buf); + xy.whitey = png_get_fixed_point(NULL, buf + 4); + xy.redx = png_get_fixed_point(NULL, buf + 8); + xy.redy = png_get_fixed_point(NULL, buf + 12); + xy.greenx = png_get_fixed_point(NULL, buf + 16); + xy.greeny = png_get_fixed_point(NULL, buf + 20); + xy.bluex = png_get_fixed_point(NULL, buf + 24); + xy.bluey = png_get_fixed_point(NULL, buf + 28); -#ifdef PNG_READ_sRGB_SUPPORTED - if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB)) + if (xy.whitex == PNG_FIXED_ERROR || + xy.whitey == PNG_FIXED_ERROR || + xy.redx == PNG_FIXED_ERROR || + xy.redy == PNG_FIXED_ERROR || + xy.greenx == PNG_FIXED_ERROR || + xy.greeny == PNG_FIXED_ERROR || + xy.bluex == PNG_FIXED_ERROR || + xy.bluey == PNG_FIXED_ERROR) { - if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) || - PNG_OUT_OF_RANGE(y_white, 32900, 1000) || - PNG_OUT_OF_RANGE(x_red, 64000, 1000) || - PNG_OUT_OF_RANGE(y_red, 33000, 1000) || - PNG_OUT_OF_RANGE(x_green, 30000, 1000) || - PNG_OUT_OF_RANGE(y_green, 60000, 1000) || - PNG_OUT_OF_RANGE(x_blue, 15000, 1000) || - PNG_OUT_OF_RANGE(y_blue, 6000, 1000)) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, x_white); - png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_fixed, y_white); - png_warning_parameter_signed(p, 3, PNG_NUMBER_FORMAT_fixed, x_red); - png_warning_parameter_signed(p, 4, PNG_NUMBER_FORMAT_fixed, y_red); - png_warning_parameter_signed(p, 5, PNG_NUMBER_FORMAT_fixed, x_green); - png_warning_parameter_signed(p, 6, PNG_NUMBER_FORMAT_fixed, y_green); - png_warning_parameter_signed(p, 7, PNG_NUMBER_FORMAT_fixed, x_blue); - png_warning_parameter_signed(p, 8, PNG_NUMBER_FORMAT_fixed, y_blue); - - png_formatted_warning(png_ptr, p, - "Ignoring incorrect cHRM white(@1,@2) r(@3,@4)g(@5,@6)b(@7,@8) " - "when sRGB is also present"); - } + png_chunk_benign_error(png_ptr, "invalid values"); return; } -#endif /* PNG_READ_sRGB_SUPPORTED */ - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - /* Store the _white values as default coefficients for the rgb to gray - * operation if it is supported. Check if the transform is already set to - * avoid destroying the transform values. - */ - if (!png_ptr->rgb_to_gray_coefficients_set) - { - /* png_set_background has not been called and we haven't seen an sRGB - * chunk yet. Find the XYZ of the three end points. - */ - png_XYZ XYZ; - png_xy xy; - - xy.redx = x_red; - xy.redy = y_red; - xy.greenx = x_green; - xy.greeny = y_green; - xy.bluex = x_blue; - xy.bluey = y_blue; - xy.whitex = x_white; - xy.whitey = y_white; - - if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) - { - /* The success case, because XYZ_from_xy normalises to a reference - * white Y of 1.0 we just need to scale the numbers. This should - * always work just fine. It is an internal error if this overflows. - */ - { - png_fixed_point r, g, b; - if (png_muldiv(&r, XYZ.redY, 32768, PNG_FP_1) && - r >= 0 && r <= 32768 && - png_muldiv(&g, XYZ.greenY, 32768, PNG_FP_1) && - g >= 0 && g <= 32768 && - png_muldiv(&b, XYZ.blueY, 32768, PNG_FP_1) && - b >= 0 && b <= 32768 && - r+g+b <= 32769) - { - /* We allow 0 coefficients here. r+g+b may be 32769 if two or - * all of the coefficients were rounded up. Handle this by - * reducing the *largest* coefficient by 1; this matches the - * approach used for the default coefficients in pngrtran.c - */ - int add = 0; - if (r+g+b > 32768) - add = -1; - else if (r+g+b < 32768) - add = 1; + /* If a colorspace error has already been output skip this chunk */ + if (png_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) + return; - if (add != 0) + if (png_ptr->colorspace.flags & PNG_COLORSPACE_FROM_cHRM) { - if (g >= r && g >= b) - g += add; - else if (r >= g && r >= b) - r += add; - else - b += add; - } - - /* Check for an internal error. */ - if (r+g+b != 32768) - png_error(png_ptr, - "internal error handling cHRM coefficients"); - - png_ptr->rgb_to_gray_red_coeff = (png_uint_16)r; - png_ptr->rgb_to_gray_green_coeff = (png_uint_16)g; + png_ptr->colorspace.flags |= PNG_COLORSPACE_INVALID; + png_colorspace_sync(png_ptr, info_ptr); + png_chunk_benign_error(png_ptr, "duplicate"); + return; } - /* This is a png_error at present even though it could be ignored - - * it should never happen, but it is important that if it does, the - * bug is fixed. - */ - else - png_error(png_ptr, "internal error handling cHRM->XYZ"); - } - } - } -#endif - - png_set_cHRM_fixed(png_ptr, info_ptr, x_white, y_white, x_red, y_red, - x_green, y_green, x_blue, y_blue); + png_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; + (void)png_colorspace_set_chromaticities(png_ptr, &png_ptr->colorspace, &xy, + 1/*prefer cHRM values*/); + png_colorspace_sync(png_ptr, info_ptr); } #endif #ifdef PNG_READ_sRGB_SUPPORTED void /* PRIVATE */ -png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_sRGB(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - int intent; - png_byte buf[1]; + png_byte intent; png_debug(1, "in png_handle_sRGB"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sRGB"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sRGB after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sRGB chunk"); + png_chunk_error(png_ptr, "missing IHDR"); - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) + else if (png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) { - png_warning(png_ptr, "Duplicate sRGB chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } if (length != 1) { - png_warning(png_ptr, "Incorrect sRGB chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } - png_crc_read(png_ptr, buf, 1); + png_crc_read(png_ptr, &intent, 1); if (png_crc_finish(png_ptr, 0)) return; - intent = buf[0]; - /* Check for bad intent */ if (intent >= PNG_sRGB_INTENT_LAST) { - png_warning(png_ptr, "Unknown sRGB intent"); + png_chunk_benign_error(png_ptr, "Unknown sRGB intent"); return; } -#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)) - { - if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500, 500)) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, - info_ptr->gamma); + /* If a colorspace error has already been output skip this chunk */ + if (png_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) + return; - png_formatted_warning(png_ptr, p, - "Ignoring incorrect gAMA value @1 when sRGB is also present"); - } + /* Only one sRGB or iCCP chunk is allowed, use the HAVE_INTENT flag to detect + * this. + */ + if (png_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_INTENT) + { + png_ptr->colorspace.flags |= PNG_COLORSPACE_INVALID; + png_colorspace_sync(png_ptr, info_ptr); + png_chunk_benign_error(png_ptr, "too many profiles"); + return; } -#endif /* PNG_READ_gAMA_SUPPORTED */ -#ifdef PNG_READ_cHRM_SUPPORTED - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_red, 64000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_green, 60000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000)) - { - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); - } -#endif /* PNG_READ_cHRM_SUPPORTED */ - - /* This is recorded for use when handling the cHRM chunk above. An sRGB - * chunk unconditionally overwrites the coefficients for grayscale conversion - * too. - */ - png_ptr->is_sRGB = 1; - -# ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - /* Don't overwrite user supplied values: */ - if (!png_ptr->rgb_to_gray_coefficients_set) - { - /* These numbers come from the sRGB specification (or, since one has to - * pay much money to get a copy, the wikipedia sRGB page) the - * chromaticity values quoted have been inverted to get the reverse - * transformation from RGB to XYZ and the 'Y' coefficients scaled by - * 32768 (then rounded). - * - * sRGB and ITU Rec-709 both truncate the values for the D65 white - * point to four digits and, even though it actually stores five - * digits, the PNG spec gives the truncated value. + /* Do not override gAMA or cHRM from the PNG file; just check they match. + * This is because we write a cHRM which corresponds to D65, however there is + * an issue with CMMs that assume a D50 environment that requires adaptation + * of the white point. This way at least it is possible to supply an + * adapated value (so long as it is within the tolerance limits for a match + * against the D65 chromaticities.) * - * This means that when the chromaticities are converted back to XYZ - * end points we end up with (6968,23435,2366), which, as described in - * pngrtran.c, would overflow. If the five digit precision and up is - * used we get, instead: - * - * 6968*R + 23435*G + 2365*B - * - * (Notice that this rounds the blue coefficient down, rather than the - * choice used in pngrtran.c which is to round the green one down.) - */ - png_ptr->rgb_to_gray_red_coeff = 6968; /* 0.212639005871510 */ - png_ptr->rgb_to_gray_green_coeff = 23434; /* 0.715168678767756 */ - /* png_ptr->rgb_to_gray_blue_coeff = 2366; 0.072192315360734 */ - - /* The following keeps the cHRM chunk from destroying the - * coefficients again in the event that it follows the sRGB chunk. + * TODO: get expert opinions on this issue */ - png_ptr->rgb_to_gray_coefficients_set = 1; - } -# endif - - png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent); + (void)png_colorspace_set_sRGB(png_ptr, &png_ptr->colorspace, intent, 0); + png_colorspace_sync(png_ptr, info_ptr); } #endif /* PNG_READ_sRGB_SUPPORTED */ #ifdef PNG_READ_iCCP_SUPPORTED void /* PRIVATE */ -png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -/* Note: this does not properly handle chunks that are > 64K under DOS */ +png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) +/* Note: this does not properly handle profiles that are > 64K under DOS */ { - png_byte compression_type; - png_bytep pC; - png_charp profile; - png_uint_32 skip = 0; - png_uint_32 profile_size; - png_alloc_size_t profile_length; - png_size_t slength, prefix_length, data_length; + png_const_charp errmsg = NULL; /* error message output, or no error */ + int finished = 0; /* crc checked */ png_debug(1, "in png_handle_iCCP"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before iCCP"); + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if (png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) { - png_warning(png_ptr, "Invalid iCCP after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place iCCP chunk"); + /* Consistent with all the above colorspace handling an obviously *invalid* + * chunk is just ignored, so does not invalidate the color space. An + * alternative is to set the 'invalid' flags at the start of this routine + * and only clear them in they were not set before and all the tests pass. + * The minimum 'deflate' stream is assumed to be just the 2 byte header and 4 + * byte checksum. The keyword must be one character and there is a + * terminator (0) byte and the compression method. + */ + if (length < 9) + { + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "too short"); + return; + } - if ((png_ptr->mode & PNG_HAVE_iCCP) || (info_ptr != NULL && - (info_ptr->valid & (PNG_INFO_iCCP|PNG_INFO_sRGB)))) + /* If a colorspace error has already been output skip this chunk */ + if (png_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) { - png_warning(png_ptr, "Duplicate iCCP chunk"); png_crc_finish(png_ptr, length); return; } - png_ptr->mode |= PNG_HAVE_iCCP; + /* Only one sRGB or iCCP chunk is allowed, use the HAVE_INTENT flag to detect + * this. + */ + if ((png_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_INTENT) == 0) + { + uInt read_length, keyword_length; + char keyword[81]; -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) + /* Find the keyword; the keyword plus separator and compression method + * bytes can be at most 81 characters long. + */ + read_length = 81; /* maximum */ + if (read_length > length) + read_length = (uInt)length; + + png_crc_read(png_ptr, (png_bytep)keyword, read_length); + length -= read_length; + + keyword_length = 0; + while (keyword_length < 80 && keyword_length < read_length && + keyword[keyword_length] != 0) + ++keyword_length; + + /* TODO: make the keyword checking common */ + if (keyword_length >= 1 && keyword_length <= 79) { - png_warning(png_ptr, "iCCP chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif + /* We only understand '0' compression - deflate - so if we get a + * different value we can't safely decode the chunk. + */ + if (keyword_length+1 < read_length && + keyword[keyword_length+1] == PNG_COMPRESSION_TYPE_BASE) + { + read_length -= keyword_length+2; - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + if (png_inflate_claim(png_ptr, png_iCCP, + png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN ? 15 : 0) == Z_OK) + { + Byte profile_header[132]; + Byte local_buffer[PNG_INFLATE_BUF_SIZE]; + png_alloc_size_t size = sizeof profile_header; - if (png_crc_finish(png_ptr, skip)) + png_ptr->zstream.next_in = (Bytef*)keyword + (keyword_length+2); + png_ptr->zstream.avail_in = read_length; + (void)png_inflate_read(png_ptr, local_buffer, + sizeof local_buffer, &length, profile_header, &size, + 0/*finish: don't, because the output is too small*/); + + if (size == 0) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + /* We have the ICC profile header; do the basic header checks. + */ + const png_uint_32 profile_length = + png_get_uint_32(profile_header); - png_ptr->chunkdata[slength] = 0x00; + if (png_icc_check_length(png_ptr, &png_ptr->colorspace, + keyword, profile_length)) + { + /* The length is apparently ok, so we can check the 132 + * byte header. + */ + if (png_icc_check_header(png_ptr, &png_ptr->colorspace, + keyword, profile_length, profile_header)) + { + /* Now read the tag table; a variable size buffer is + * needed at this point, allocate one for the whole + * profile. The header check has already validated + * that none of these stuff will overflow. + */ + const png_uint_32 tag_count = png_get_uint_32( + profile_header+128); + png_bytep profile = png_read_buffer(png_ptr, + profile_length, 2/*silent*/); - for (profile = png_ptr->chunkdata; *profile; profile++) - /* Empty loop to find end of name */ ; + if (profile != NULL) + { + memcpy(profile, profile_header, + sizeof profile_header); - ++profile; + size = 12 * tag_count; - /* There should be at least one zero (the compression type byte) - * following the separator, and we should be on it + (void)png_inflate_read(png_ptr, local_buffer, + sizeof local_buffer, &length, + profile + (sizeof profile_header), &size, 0); + + /* Still expect a a buffer error because we expect + * there to be some tag data! */ - if (profile >= png_ptr->chunkdata + slength - 1) + if (size == 0) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "Malformed iCCP chunk"); - return; - } + if (png_icc_check_tag_table(png_ptr, + &png_ptr->colorspace, keyword, profile_length, + profile)) + { + /* The profile has been validated for basic + * security issues, so read the whole thing in. + */ + size = profile_length - (sizeof profile_header) + - 12 * tag_count; + + (void)png_inflate_read(png_ptr, local_buffer, + sizeof local_buffer, &length, + profile + (sizeof profile_header) + + 12 * tag_count, &size, 1/*finish*/); - /* Compression_type should always be zero */ - compression_type = *profile++; + if (length > 0 && !(png_ptr->flags & + PNG_FLAG_BENIGN_ERRORS_WARN)) + errmsg = "extra compressed data"; - if (compression_type) + /* But otherwise allow extra data: */ + else if (size == 0) { - png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk"); - compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8 - wrote nonzero) */ + int ok; + + if (length > 0) + { + /* This can be handled completely, so + * keep going. + */ + png_chunk_warning(png_ptr, + "extra compressed data"); } - prefix_length = profile - png_ptr->chunkdata; - png_decompress_chunk(png_ptr, compression_type, - slength, prefix_length, &data_length); + png_crc_finish(png_ptr, length); + finished = 1; - profile_length = data_length - prefix_length; + /* Set the gAMA and cHRM information, this + * checks for a known sRGB profile. The + * result is 0 on error. + */ + ok = png_icc_set_gAMA_and_cHRM(png_ptr, + &png_ptr->colorspace, keyword, profile, + png_ptr->zstream.adler, + 0/*prefer explicit gAMA/cHRM*/); - if (prefix_length > data_length || profile_length < 4) + /* Steal the profile for info_ptr. */ + if (ok && info_ptr != NULL) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "Profile size field missing from iCCP chunk"); - return; + png_free_data(png_ptr, info_ptr, + PNG_FREE_ICCP, 0); + + info_ptr->iccp_name = png_voidcast(char*, + png_malloc_base(png_ptr, + keyword_length+1)); + if (info_ptr->iccp_name != NULL) + { + memcpy(info_ptr->iccp_name, keyword, + keyword_length+1); + info_ptr->iccp_proflen = + profile_length; + info_ptr->iccp_profile = profile; + png_ptr->read_buffer = NULL; /*steal*/ + info_ptr->free_me |= PNG_FREE_ICCP; + info_ptr->valid |= PNG_INFO_iCCP; } - /* Check the profile_size recorded in the first 32 bits of the ICC profile */ - pC = (png_bytep)(png_ptr->chunkdata + prefix_length); - profile_size = ((*(pC )) << 24) | - ((*(pC + 1)) << 16) | - ((*(pC + 2)) << 8) | - ((*(pC + 3)) ); + else + { + png_ptr->colorspace.flags |= + PNG_COLORSPACE_INVALID; + errmsg = "out of memory"; + } + } - /* NOTE: the following guarantees that 'profile_length' fits into 32 bits, - * because profile_size is a 32 bit value. + /* else the profile remains in the read + * buffer which gets reused for subsequent + * chunks. */ - if (profile_size < profile_length) - profile_length = profile_size; - /* And the following guarantees that profile_size == profile_length. */ - if (profile_size > profile_length) + if (info_ptr != NULL) + png_colorspace_sync(png_ptr, info_ptr); + + if (errmsg == NULL && ok) { - PNG_WARNING_PARAMETERS(p) + png_ptr->zowner = 0; + return; + } + + /* else png_icc_set_gAMA_and_cHRM has + * already output an error. + */ + } - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + else if (size > 0) + errmsg = "truncated"; - png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_u, profile_size); - png_warning_parameter_unsigned(p, 2, PNG_NUMBER_FORMAT_u, profile_length); - png_formatted_warning(png_ptr, p, - "Ignoring iCCP chunk with declared size = @1 and actual length = @2"); - return; + else + errmsg = png_ptr->zstream.msg; + } + + /* else png_icc_check_tag_table output an error */ + } + + else /* profile truncated */ + errmsg = png_ptr->zstream.msg; + } + + else + errmsg = "out of memory"; + } + + /* else png_icc_check_header output an error */ } - png_set_iCCP(png_ptr, info_ptr, png_ptr->chunkdata, - compression_type, (png_bytep)png_ptr->chunkdata + prefix_length, - profile_size); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + /* else png_icc_check_length output an error */ + } + + else /* profile truncated */ + errmsg = png_ptr->zstream.msg; + + /* Release the stream */ + png_ptr->zowner = 0; + } + + else /* png_inflate_claim failed */ + errmsg = png_ptr->zstream.msg; + } + + else + errmsg = "bad compression method"; /* or missing */ + } + + else + errmsg = "bad keyword"; + } + + else + errmsg = "too many profiles"; + + /* Failure: the reason is in 'errmsg' */ + if (!finished) + png_crc_finish(png_ptr, length); + + png_ptr->colorspace.flags |= PNG_COLORSPACE_INVALID; + png_colorspace_sync(png_ptr, info_ptr); + if (errmsg != NULL) /* else already output */ + png_chunk_benign_error(png_ptr, errmsg); } #endif /* PNG_READ_iCCP_SUPPORTED */ #ifdef PNG_READ_sPLT_SUPPORTED void /* PRIVATE */ -png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_sPLT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) /* Note: this does not properly handle chunks that are > 64K under DOS */ { - png_bytep entry_start; + png_bytep entry_start, buffer; png_sPLT_t new_palette; png_sPLT_entryp pp; png_uint_32 data_length; int entry_size, i; png_uint_32 skip = 0; - png_size_t slength; png_uint_32 dl; png_size_t max_dl; png_debug(1, "in png_handle_sPLT"); @@ -1402,74 +1628,68 @@ } #endif if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sPLT"); + png_chunk_error(png_ptr, "missing IHDR"); else if (png_ptr->mode & PNG_HAVE_IDAT) { - png_warning(png_ptr, "Invalid sPLT after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } #ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) + if (length > 65535U) { - png_warning(png_ptr, "sPLT chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "too large to fit in memory"); + return; } #endif - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); + buffer = png_read_buffer(png_ptr, length+1, 2/*silent*/); + if (buffer == NULL) + { + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of memory"); + return; + } + /* WARNING: this may break if size_t is less than 32 bits; it is assumed * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a * potential breakage point if the types in pngconf.h aren't exactly right. */ - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; return; - } - png_ptr->chunkdata[slength] = 0x00; + buffer[length] = 0; - for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start; - entry_start++) + for (entry_start = buffer; *entry_start; entry_start++) /* Empty loop to find end of name */ ; ++entry_start; /* A sample depth should follow the separator, and we should be on it */ - if (entry_start > (png_bytep)png_ptr->chunkdata + slength - 2) + if (entry_start > buffer + length - 2) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_warning(png_ptr, "malformed sPLT chunk"); return; } new_palette.depth = *entry_start++; entry_size = (new_palette.depth == 8 ? 6 : 10); /* This must fit in a png_uint_32 because it is derived from the original - * chunk data length (and use 'length', not 'slength' here for clarity - - * they are guaranteed to be the same, see the tests above.) + * chunk data length. */ - data_length = length - (png_uint_32)(entry_start - - (png_bytep)png_ptr->chunkdata); + data_length = length - (png_uint_32)(entry_start - buffer); /* Integrity-check the data length */ if (data_length % entry_size) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_warning(png_ptr, "sPLT chunk has bad length"); return; } @@ -1542,40 +1762,38 @@ } #endif /* Discard all chunk data except the name and stash that */ - new_palette.name = png_ptr->chunkdata; + new_palette.name = (png_charp)buffer; png_set_sPLT(png_ptr, info_ptr, &new_palette, 1); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_free(png_ptr, new_palette.entries); } #endif /* PNG_READ_sPLT_SUPPORTED */ #ifdef PNG_READ_tRNS_SUPPORTED void /* PRIVATE */ -png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_tRNS(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte readbuf[PNG_MAX_PALETTE_LENGTH]; png_debug(1, "in png_handle_tRNS"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tRNS"); + png_chunk_error(png_ptr, "missing IHDR"); else if (png_ptr->mode & PNG_HAVE_IDAT) { - png_warning(png_ptr, "Invalid tRNS after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) { - png_warning(png_ptr, "Duplicate tRNS chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) @@ -1583,10 +1801,10 @@ png_byte buf[2]; if (length != 2) { - png_warning(png_ptr, "Incorrect tRNS chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 2); @@ -1599,14 +1817,14 @@ png_byte buf[6]; if (length != 6) { - png_warning(png_ptr, "Incorrect tRNS chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } - png_crc_read(png_ptr, buf, (png_size_t)length); + png_crc_read(png_ptr, buf, length); png_ptr->num_trans = 1; png_ptr->trans_color.red = png_get_uint_16(buf); png_ptr->trans_color.green = png_get_uint_16(buf + 2); png_ptr->trans_color.blue = png_get_uint_16(buf + 4); @@ -1615,35 +1833,30 @@ else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { if (!(png_ptr->mode & PNG_HAVE_PLTE)) { - /* Should be an error, but we can cope with it. */ - png_warning(png_ptr, "Missing PLTE before tRNS"); - } - - if (length > (png_uint_32)png_ptr->num_palette || - length > PNG_MAX_PALETTE_LENGTH) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); + /* TODO: is this actually an error in the ISO spec? */ png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - if (length == 0) + if (length > png_ptr->num_palette || length > PNG_MAX_PALETTE_LENGTH || + length == 0) { - png_warning(png_ptr, "Zero length tRNS chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } - png_crc_read(png_ptr, readbuf, (png_size_t)length); + png_crc_read(png_ptr, readbuf, length); png_ptr->num_trans = (png_uint_16)length; } else { - png_warning(png_ptr, "tRNS chunk not allowed with alpha channel"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid with alpha channel"); return; } if (png_crc_finish(png_ptr, 0)) @@ -1651,45 +1864,43 @@ png_ptr->num_trans = 0; return; } + /* TODO: this is a horrible side effect in the palette case because the + * png_struct ends up with a pointer to the tRNS buffer owned by the + * png_info. Fix this. + */ png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans, &(png_ptr->trans_color)); } #endif #ifdef PNG_READ_bKGD_SUPPORTED void /* PRIVATE */ -png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_bKGD(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_size_t truelen; + unsigned int truelen; png_byte buf[6]; png_color_16 background; png_debug(1, "in png_handle_bKGD"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before bKGD"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid bKGD after IDAT"); - png_crc_finish(png_ptr, length); - return; - } + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) + else if ((png_ptr->mode & PNG_HAVE_IDAT) || + (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + !(png_ptr->mode & PNG_HAVE_PLTE))) { - png_warning(png_ptr, "Missing PLTE before bKGD"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)) { - png_warning(png_ptr, "Duplicate bKGD chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) @@ -1702,10 +1913,10 @@ truelen = 2; if (length != truelen) { - png_warning(png_ptr, "Incorrect bKGD chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, truelen); @@ -1725,9 +1936,9 @@ if (info_ptr && info_ptr->num_palette) { if (buf[0] >= info_ptr->num_palette) { - png_warning(png_ptr, "Incorrect bKGD chunk index value"); + png_chunk_benign_error(png_ptr, "invalid index"); return; } background.red = (png_uint_16)png_ptr->palette[buf[0]].red; @@ -1764,49 +1975,41 @@ #endif #ifdef PNG_READ_hIST_SUPPORTED void /* PRIVATE */ -png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_hIST(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { unsigned int num, i; png_uint_16 readbuf[PNG_MAX_PALETTE_LENGTH]; png_debug(1, "in png_handle_hIST"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before hIST"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid hIST after IDAT"); - png_crc_finish(png_ptr, length); - return; - } + png_chunk_error(png_ptr, "missing IHDR"); - else if (!(png_ptr->mode & PNG_HAVE_PLTE)) + else if ((png_ptr->mode & PNG_HAVE_IDAT) || !(png_ptr->mode & PNG_HAVE_PLTE)) { - png_warning(png_ptr, "Missing PLTE before hIST"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)) { - png_warning(png_ptr, "Duplicate hIST chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } - if (length > 2*PNG_MAX_PALETTE_LENGTH || - length != (unsigned int) (2*png_ptr->num_palette)) + num = length / 2 ; + + if (num != png_ptr->num_palette || num > PNG_MAX_PALETTE_LENGTH) { - png_warning(png_ptr, "Incorrect hIST chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } - num = length / 2 ; - for (i = 0; i < num; i++) { png_byte buf[2]; @@ -1822,37 +2025,37 @@ #endif #ifdef PNG_READ_pHYs_SUPPORTED void /* PRIVATE */ -png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_pHYs(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[9]; png_uint_32 res_x, res_y; int unit_type; png_debug(1, "in png_handle_pHYs"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pHYs"); + png_chunk_error(png_ptr, "missing IHDR"); else if (png_ptr->mode & PNG_HAVE_IDAT) { - png_warning(png_ptr, "Invalid pHYs after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { - png_warning(png_ptr, "Duplicate pHYs chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (length != 9) { - png_warning(png_ptr, "Incorrect pHYs chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 9); @@ -1868,37 +2071,37 @@ #endif #ifdef PNG_READ_oFFs_SUPPORTED void /* PRIVATE */ -png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_oFFs(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[9]; png_int_32 offset_x, offset_y; int unit_type; png_debug(1, "in png_handle_oFFs"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before oFFs"); + png_chunk_error(png_ptr, "missing IHDR"); else if (png_ptr->mode & PNG_HAVE_IDAT) { - png_warning(png_ptr, "Invalid oFFs after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { - png_warning(png_ptr, "Duplicate oFFs chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (length != 9) { - png_warning(png_ptr, "Incorrect oFFs chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 9); @@ -1915,73 +2118,66 @@ #ifdef PNG_READ_pCAL_SUPPORTED /* Read the pCAL chunk (described in the PNG Extensions document) */ void /* PRIVATE */ -png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_pCAL(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_int_32 X0, X1; png_byte type, nparams; - png_charp buf, units, endptr; + png_bytep buffer, buf, units, endptr; png_charpp params; - png_size_t slength; int i; png_debug(1, "in png_handle_pCAL"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pCAL"); + png_chunk_error(png_ptr, "missing IHDR"); else if (png_ptr->mode & PNG_HAVE_IDAT) { - png_warning(png_ptr, "Invalid pCAL after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)) { - png_warning(png_ptr, "Duplicate pCAL chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } png_debug1(2, "Allocating and reading pCAL chunk data (%u bytes)", length + 1); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); - if (png_ptr->chunkdata == NULL) + buffer = png_read_buffer(png_ptr, length+1, 2/*silent*/); + + if (buffer == NULL) { - png_warning(png_ptr, "No memory for pCAL purpose"); + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of memory"); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; return; - } - png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ + buffer[length] = 0; /* Null terminate the last string */ png_debug(3, "Finding end of pCAL purpose string"); - for (buf = png_ptr->chunkdata; *buf; buf++) + for (buf = buffer; *buf; buf++) /* Empty loop */ ; - endptr = png_ptr->chunkdata + slength; + endptr = buffer + length; /* We need to have at least 12 bytes after the purpose string * in order to get the parameter information. */ if (endptr <= buf + 12) { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + png_chunk_benign_error(png_ptr, "invalid"); return; } png_debug(3, "Reading pCAL X0, X1, type, nparams, and units"); @@ -1999,129 +2195,115 @@ (type == PNG_EQUATION_BASE_E && nparams != 3) || (type == PNG_EQUATION_ARBITRARY && nparams != 3) || (type == PNG_EQUATION_HYPERBOLIC && nparams != 4)) { - png_warning(png_ptr, "Invalid pCAL parameters for equation type"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + png_chunk_benign_error(png_ptr, "invalid parameter count"); return; } else if (type >= PNG_EQUATION_LAST) { - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); + png_chunk_benign_error(png_ptr, "unrecognized equation type"); } for (buf = units; *buf; buf++) /* Empty loop to move past the units string. */ ; png_debug(3, "Allocating pCAL parameters array"); - params = (png_charpp)png_malloc_warn(png_ptr, - (png_size_t)(nparams * png_sizeof(png_charp))); + params = png_voidcast(png_charpp, png_malloc_warn(png_ptr, + nparams * png_sizeof(png_charp))); if (params == NULL) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "No memory for pCAL params"); + png_chunk_benign_error(png_ptr, "out of memory"); return; } /* Get pointers to the start of each parameter string. */ - for (i = 0; i < (int)nparams; i++) + for (i = 0; i < nparams; i++) { buf++; /* Skip the null string terminator from previous parameter. */ png_debug1(3, "Reading pCAL parameter %d", i); - for (params[i] = buf; buf <= endptr && *buf != 0x00; buf++) + for (params[i] = (png_charp)buf; buf <= endptr && *buf != 0; buf++) /* Empty loop to move past each parameter string */ ; /* Make sure we haven't run out of data yet */ if (buf > endptr) { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_free(png_ptr, params); + png_chunk_benign_error(png_ptr, "invalid data"); return; } } - png_set_pCAL(png_ptr, info_ptr, png_ptr->chunkdata, X0, X1, type, nparams, - units, params); + png_set_pCAL(png_ptr, info_ptr, (png_charp)buffer, X0, X1, type, nparams, + (png_charp)units, params); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_free(png_ptr, params); } #endif #ifdef PNG_READ_sCAL_SUPPORTED /* Read the sCAL chunk */ void /* PRIVATE */ -png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_sCAL(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_size_t slength, i; + png_bytep buffer; + png_size_t i; int state; png_debug(1, "in png_handle_sCAL"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sCAL"); + png_chunk_error(png_ptr, "missing IHDR"); else if (png_ptr->mode & PNG_HAVE_IDAT) { - png_warning(png_ptr, "Invalid sCAL after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) { - png_warning(png_ptr, "Duplicate sCAL chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } /* Need unit type, width, \0, height: minimum 4 bytes */ else if (length < 4) { - png_warning(png_ptr, "sCAL chunk too short"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_debug1(2, "Allocating and reading sCAL chunk data (%u bytes)", length + 1); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + buffer = png_read_buffer(png_ptr, length+1, 2/*silent*/); - if (png_ptr->chunkdata == NULL) + if (buffer == NULL) { - png_warning(png_ptr, "Out of memory while processing sCAL chunk"); + png_chunk_benign_error(png_ptr, "out of memory"); png_crc_finish(png_ptr, length); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ + png_crc_read(png_ptr, buffer, length); + buffer[length] = 0; /* Null terminate the last string */ if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; return; - } /* Validate the unit. */ - if (png_ptr->chunkdata[0] != 1 && png_ptr->chunkdata[0] != 2) + if (buffer[0] != 1 && buffer[0] != 2) { - png_warning(png_ptr, "Invalid sCAL ignored: invalid unit"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + png_chunk_benign_error(png_ptr, "invalid unit"); return; } /* Validate the ASCII numbers, need two ASCII numbers separated by @@ -2129,66 +2311,61 @@ */ i = 1; state = 0; - if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || - i >= slength || png_ptr->chunkdata[i++] != 0) - png_warning(png_ptr, "Invalid sCAL chunk ignored: bad width format"); + if (!png_check_fp_number((png_const_charp)buffer, length, &state, &i) || + i >= length || buffer[i++] != 0) + png_chunk_benign_error(png_ptr, "bad width format"); else if (!PNG_FP_IS_POSITIVE(state)) - png_warning(png_ptr, "Invalid sCAL chunk ignored: non-positive width"); + png_chunk_benign_error(png_ptr, "non-positive width"); else { png_size_t heighti = i; state = 0; - if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || - i != slength) - png_warning(png_ptr, "Invalid sCAL chunk ignored: bad height format"); + if (!png_check_fp_number((png_const_charp)buffer, length, &state, &i) || + i != length) + png_chunk_benign_error(png_ptr, "bad height format"); else if (!PNG_FP_IS_POSITIVE(state)) - png_warning(png_ptr, - "Invalid sCAL chunk ignored: non-positive height"); + png_chunk_benign_error(png_ptr, "non-positive height"); else /* This is the (only) success case. */ - png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0], - png_ptr->chunkdata+1, png_ptr->chunkdata+heighti); + png_set_sCAL_s(png_ptr, info_ptr, buffer[0], + (png_charp)buffer+1, (png_charp)buffer+heighti); } - - /* Clean up - just free the temporarily allocated buffer. */ - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; } #endif #ifdef PNG_READ_tIME_SUPPORTED void /* PRIVATE */ -png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_tIME(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[7]; png_time mod_time; png_debug(1, "in png_handle_tIME"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Out of place tIME chunk"); + png_chunk_error(png_ptr, "missing IHDR"); else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)) { - png_warning(png_ptr, "Duplicate tIME chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (png_ptr->mode & PNG_HAVE_IDAT) png_ptr->mode |= PNG_AFTER_IDAT; if (length != 7) { - png_warning(png_ptr, "Incorrect tIME chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 7); @@ -2209,16 +2386,15 @@ #ifdef PNG_READ_tEXt_SUPPORTED /* Note: this does not properly handle chunks that are > 64K under DOS */ void /* PRIVATE */ -png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_tEXt(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_textp text_ptr; + png_text text_info; + png_bytep buffer; png_charp key; png_charp text; png_uint_32 skip = 0; - png_size_t slength; - int ret; png_debug(1, "in png_handle_tEXt"); #ifdef PNG_USER_LIMITS_SUPPORTED @@ -2231,100 +2407,73 @@ } if (--png_ptr->user_chunk_cache_max == 1) { - png_warning(png_ptr, "No space in chunk cache for tEXt"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "no space in chunk cache"); return; } } #endif if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tEXt"); + png_chunk_error(png_ptr, "missing IHDR"); if (png_ptr->mode & PNG_HAVE_IDAT) png_ptr->mode |= PNG_AFTER_IDAT; #ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) + if (length > 65535U) { - png_warning(png_ptr, "tEXt chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "too large to fit in memory"); + return; } #endif - png_free(png_ptr, png_ptr->chunkdata); - - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + buffer = png_read_buffer(png_ptr, length+1, 1/*warn*/); - if (png_ptr->chunkdata == NULL) + if (buffer == NULL) { - png_warning(png_ptr, "No memory to process text chunk"); + png_chunk_benign_error(png_ptr, "out of memory"); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; return; - } - key = png_ptr->chunkdata; - - key[slength] = 0x00; + key = (png_charp)buffer; + key[length] = 0; for (text = key; *text; text++) /* Empty loop to find end of key */ ; - if (text != key + slength) + if (text != key + length) text++; - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); - - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process text chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr->key = key; - text_ptr->lang = NULL; - text_ptr->lang_key = NULL; - text_ptr->itxt_length = 0; - text_ptr->text = text; - text_ptr->text_length = png_strlen(text); - - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_free(png_ptr, text_ptr); + text_info.compression = PNG_TEXT_COMPRESSION_NONE; + text_info.key = key; + text_info.lang = NULL; + text_info.lang_key = NULL; + text_info.itxt_length = 0; + text_info.text = text; + text_info.text_length = png_strlen(text); - if (ret) + if (png_set_text_2(png_ptr, info_ptr, &text_info, 1)) png_warning(png_ptr, "Insufficient memory to process text chunk"); } #endif #ifdef PNG_READ_zTXt_SUPPORTED /* Note: this does not correctly handle chunks that are > 64K under DOS */ void /* PRIVATE */ -png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_zTXt(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_textp text_ptr; - png_charp text; - int comp_type; - int ret; - png_size_t slength, prefix_len, data_len; + png_const_charp errmsg = NULL; + png_bytep buffer; + png_uint_32 keyword_length; png_debug(1, "in png_handle_zTXt"); #ifdef PNG_USER_LIMITS_SUPPORTED @@ -2337,125 +2486,103 @@ } if (--png_ptr->user_chunk_cache_max == 1) { - png_warning(png_ptr, "No space in chunk cache for zTXt"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "no space in chunk cache"); return; } } #endif if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before zTXt"); + png_chunk_error(png_ptr, "missing IHDR"); if (png_ptr->mode & PNG_HAVE_IDAT) png_ptr->mode |= PNG_AFTER_IDAT; -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - * there is no hard and fast rule to tell us where to stop. - */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "zTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; - } -#endif - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + buffer = png_read_buffer(png_ptr, length, 2/*silent*/); - if (png_ptr->chunkdata == NULL) + if (buffer == NULL) { - png_warning(png_ptr, "Out of memory processing zTXt chunk"); + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of memory"); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; return; - } - png_ptr->chunkdata[slength] = 0x00; + /* TODO: also check that the keyword contents match the spec! */ + for (keyword_length = 0; + keyword_length < length && buffer[keyword_length] != 0; + ++keyword_length) + /* Empty loop to find end of name */ ; - for (text = png_ptr->chunkdata; *text; text++) - /* Empty loop */ ; + if (keyword_length > 79 || keyword_length < 1) + errmsg = "bad keyword"; - /* zTXt must have some text after the chunkdataword */ - if (text >= png_ptr->chunkdata + slength - 2) - { - png_warning(png_ptr, "Truncated zTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + /* zTXt must have some LZ data after the keyword, although it may expand to + * zero bytes; we need a '\0' at the end of the keyword, the compression type + * then the LZ data: + */ + else if (keyword_length + 3 > length) + errmsg = "truncated"; + + else if (buffer[keyword_length+1] != PNG_COMPRESSION_TYPE_BASE) + errmsg = "unknown compression type"; else { - comp_type = *(++text); + png_alloc_size_t uncompressed_length = PNG_SIZE_MAX; - if (comp_type != PNG_TEXT_COMPRESSION_zTXt) + /* TODO: at present png_decompress_chunk imposes a single application + * level memory limit, this should be split to different values for iCCP + * and text chunks. + */ + if (png_decompress_chunk(png_ptr, length, keyword_length+2, + &uncompressed_length, 1/*terminate*/) == Z_STREAM_END) { - png_warning(png_ptr, "Unknown compression type in zTXt chunk"); - comp_type = PNG_TEXT_COMPRESSION_zTXt; - } - - text++; /* Skip the compression_method byte */ - } + png_text text; - prefix_len = text - png_ptr->chunkdata; - - png_decompress_chunk(png_ptr, comp_type, - (png_size_t)length, prefix_len, &data_len); + /* It worked; png_ptr->read_buffer now looks like a tEXt chunk except + * for the extra compression type byte and the fact that it isn't + * necessarily '\0' terminated. + */ + buffer = png_ptr->read_buffer; + buffer[uncompressed_length+(keyword_length+2)] = 0; - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); + text.compression = PNG_TEXT_COMPRESSION_zTXt; + text.key = (png_charp)buffer; + text.text = (png_charp)(buffer + keyword_length+2); + text.text_length = uncompressed_length; + text.itxt_length = 0; + text.lang = NULL; + text.lang_key = NULL; - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process zTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; + if (png_set_text_2(png_ptr, info_ptr, &text, 1)) + errmsg = "insufficient memory"; } - text_ptr->compression = comp_type; - text_ptr->key = png_ptr->chunkdata; - text_ptr->lang = NULL; - text_ptr->lang_key = NULL; - text_ptr->itxt_length = 0; - text_ptr->text = png_ptr->chunkdata + prefix_len; - text_ptr->text_length = data_len; - - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + else + errmsg = png_ptr->zstream.msg; + } - if (ret) - png_error(png_ptr, "Insufficient memory to store zTXt chunk"); + if (errmsg != NULL) + png_chunk_benign_error(png_ptr, errmsg); } #endif #ifdef PNG_READ_iTXt_SUPPORTED /* Note: this does not correctly handle chunks that are > 64K under DOS */ void /* PRIVATE */ -png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_iTXt(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_textp text_ptr; - png_charp key, lang, text, lang_key; - int comp_flag; - int comp_type = 0; - int ret; - png_size_t slength, prefix_len, data_len; + png_const_charp errmsg = NULL; + png_bytep buffer; + png_uint_32 prefix_length; png_debug(1, "in png_handle_iTXt"); #ifdef PNG_USER_LIMITS_SUPPORTED @@ -2468,150 +2595,133 @@ } if (--png_ptr->user_chunk_cache_max == 1) { - png_warning(png_ptr, "No space in chunk cache for iTXt"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "no space in chunk cache"); return; } } #endif if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before iTXt"); + png_chunk_error(png_ptr, "missing IHDR"); if (png_ptr->mode & PNG_HAVE_IDAT) png_ptr->mode |= PNG_AFTER_IDAT; -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - * there is no hard and fast rule to tell us where to stop. - */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "iTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; - } -#endif - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + buffer = png_read_buffer(png_ptr, length+1, 1/*warn*/); - if (png_ptr->chunkdata == NULL) + if (buffer == NULL) { - png_warning(png_ptr, "No memory to process iTXt chunk"); + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of memory"); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; return; - } - png_ptr->chunkdata[slength] = 0x00; + /* First the keyword. */ + for (prefix_length=0; + prefix_length < length && buffer[prefix_length] != 0; + ++prefix_length) + /* Empty loop */ ; + + /* Perform a basic check on the keyword length here. */ + if (prefix_length > 79 || prefix_length < 1) + errmsg = "bad keyword"; + + /* Expect keyword, compression flag, compression type, language, translated + * keyword (both may be empty but are 0 terminated) then the text, which may + * be empty. + */ + else if (prefix_length + 5 > length) + errmsg = "truncated"; + + else if (buffer[prefix_length+1] == 0 || + (buffer[prefix_length+1] == 1 && + buffer[prefix_length+2] == PNG_COMPRESSION_TYPE_BASE)) + { + int compressed = buffer[prefix_length+1] != 0; + png_uint_32 language_offset, translated_keyword_offset; + png_alloc_size_t uncompressed_length = 0; + + /* Now the language tag */ + prefix_length += 3; + language_offset = prefix_length; - for (lang = png_ptr->chunkdata; *lang; lang++) + for (; prefix_length < length && buffer[prefix_length] != 0; + ++prefix_length) /* Empty loop */ ; - lang++; /* Skip NUL separator */ + /* WARNING: the length may be invalid here, this is checked below. */ + translated_keyword_offset = ++prefix_length; - /* iTXt must have a language tag (possibly empty), two compression bytes, - * translated keyword (possibly empty), and possibly some text after the - * keyword - */ + for (; prefix_length < length && buffer[prefix_length] != 0; + ++prefix_length) + /* Empty loop */ ; - if (lang >= png_ptr->chunkdata + slength - 3) - { - png_warning(png_ptr, "Truncated iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + /* prefix_length should now be at the trailing '\0' of the translated + * keyword, but it may already be over the end. None of this arithmetic + * can overflow because chunks are at most 2^31 bytes long, but on 16-bit + * systems the available allocaton may overflow. + */ + ++prefix_length; - else - { - comp_flag = *lang++; - comp_type = *lang++; - } + if (!compressed && prefix_length <= length) + uncompressed_length = length - prefix_length; - if (comp_type || (comp_flag && comp_flag != PNG_TEXT_COMPRESSION_zTXt)) + else if (compressed && prefix_length < length) { - png_warning(png_ptr, "Unknown iTXt compression type or method"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - for (lang_key = lang; *lang_key; lang_key++) - /* Empty loop */ ; + uncompressed_length = PNG_SIZE_MAX; - lang_key++; /* Skip NUL separator */ + /* TODO: at present png_decompress_chunk imposes a single application + * level memory limit, this should be split to different values for + * iCCP and text chunks. + */ + if (png_decompress_chunk(png_ptr, length, prefix_length, + &uncompressed_length, 1/*terminate*/) == Z_STREAM_END) + buffer = png_ptr->read_buffer; - if (lang_key >= png_ptr->chunkdata + slength) - { - png_warning(png_ptr, "Truncated iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; + else + errmsg = png_ptr->zstream.msg; } - for (text = lang_key; *text; text++) - /* Empty loop */ ; - - text++; /* Skip NUL separator */ + else + errmsg = "truncated"; - if (text >= png_ptr->chunkdata + slength) + if (errmsg == NULL) { - png_warning(png_ptr, "Malformed iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + png_text text; - prefix_len = text - png_ptr->chunkdata; + buffer[uncompressed_length+prefix_length] = 0; - key=png_ptr->chunkdata; - - if (comp_flag) - png_decompress_chunk(png_ptr, comp_type, - (size_t)length, prefix_len, &data_len); + if (compressed) + text.compression = PNG_ITXT_COMPRESSION_NONE; else - data_len = png_strlen(png_ptr->chunkdata + prefix_len); + text.compression = PNG_ITXT_COMPRESSION_zTXt; - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); + text.key = (png_charp)buffer; + text.lang = (png_charp)buffer + language_offset; + text.lang_key = (png_charp)buffer + translated_keyword_offset; + text.text = (png_charp)buffer + prefix_length; + text.text_length = 0; + text.itxt_length = uncompressed_length; - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; + if (png_set_text_2(png_ptr, info_ptr, &text, 1)) + errmsg = "insufficient memory"; + } } - text_ptr->compression = (int)comp_flag + 1; - text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key); - text_ptr->lang = png_ptr->chunkdata + (lang - key); - text_ptr->itxt_length = data_len; - text_ptr->text_length = 0; - text_ptr->key = png_ptr->chunkdata; - text_ptr->text = png_ptr->chunkdata + prefix_len; - - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + else + errmsg = "bad compression info"; - if (ret) - png_error(png_ptr, "Insufficient memory to store iTXt chunk"); + if (errmsg != NULL) + png_chunk_benign_error(png_ptr, errmsg); } #endif /* This function is called when we haven't found a handler for a @@ -2620,9 +2730,10 @@ * -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which * case it will be saved away to be written out later. */ void /* PRIVATE */ -png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length) { png_uint_32 skip = 0; png_debug(1, "in png_handle_unknown"); @@ -2637,10 +2748,10 @@ } if (--png_ptr->user_chunk_cache_max == 1) { - png_warning(png_ptr, "No space in chunk cache for unknown chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "no space in chunk cache"); return; } } #endif @@ -2673,11 +2784,12 @@ { #ifdef PNG_MAX_MALLOC_64K if (length > 65535) { - png_warning(png_ptr, "unknown chunk too large to fit in memory"); - skip = length - 65535; - length = 65535; + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, + "unknown chunk too large to fit in memory"); + return; } #endif /* TODO: this code is very close to the unknown handling in pngpread.c, @@ -2756,9 +2868,9 @@ * ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97)) */ void /* PRIVATE */ -png_check_chunk_name(png_structp png_ptr, png_uint_32 chunk_name) +png_check_chunk_name(png_structrp png_ptr, png_uint_32 chunk_name) { int i; png_debug(1, "in png_check_chunk_name"); @@ -2781,9 +2893,9 @@ * (dp) is filled from the start by replicating the available pixels. If * 'display' is false only those pixels present in the pass are filled in. */ void /* PRIVATE */ -png_combine_row(png_structp png_ptr, png_bytep dp, int display) +png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display) { unsigned int pixel_depth = png_ptr->transformed_pixel_depth; png_const_bytep sp = png_ptr->row_buf + 1; png_uint_32 row_width = png_ptr->width; @@ -3148,10 +3260,11 @@ png_isaligned(sp, png_uint_32) && bytes_to_copy % sizeof (png_uint_32) == 0 && bytes_to_jump % sizeof (png_uint_32) == 0) { - png_uint_32p dp32 = (png_uint_32p)dp; - png_const_uint_32p sp32 = (png_const_uint_32p)sp; + png_uint_32p dp32 = png_aligncast(png_uint_32p,dp); + png_const_uint_32p sp32 = png_aligncastconst( + png_const_uint_32p, sp); unsigned int skip = (bytes_to_jump-bytes_to_copy) / sizeof (png_uint_32); do @@ -3189,10 +3302,11 @@ * not too large. */ else { - png_uint_16p dp16 = (png_uint_16p)dp; - png_const_uint_16p sp16 = (png_const_uint_16p)sp; + png_uint_16p dp16 = png_aligncast(png_uint_16p, dp); + png_const_uint_16p sp16 = png_aligncastconst( + png_const_uint_16p, sp); unsigned int skip = (bytes_to_jump-bytes_to_copy) / sizeof (png_uint_16); do @@ -3313,10 +3427,11 @@ { v = (png_byte)((*sp >> sshift) & 0x01); for (j = 0; j < jstop; j++) { - *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); + unsigned int tmp = *dp & (0x7f7f >> (7 - dshift)); + tmp |= v << dshift; + *dp = (png_byte)(tmp & 0xff); if (dshift == s_end) { dshift = s_start; @@ -3375,10 +3490,11 @@ v = (png_byte)((*sp >> sshift) & 0x03); for (j = 0; j < jstop; j++) { - *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); + unsigned int tmp = *dp & (0x3f3f >> (6 - dshift)); + tmp |= v << dshift; + *dp = (png_byte)(tmp & 0xff); if (dshift == s_end) { dshift = s_start; @@ -3436,10 +3552,11 @@ int j; for (j = 0; j < jstop; j++) { - *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); + unsigned int tmp = *dp & (0xf0f >> (4 - dshift)); + tmp |= v << dshift; + *dp = (png_byte)(tmp & 0xff); if (dshift == s_end) { dshift = s_start; @@ -3692,9 +3809,9 @@ } #endif /* __linux__ */ static void -png_init_filter_functions_neon(png_structp pp, unsigned int bpp) +png_init_filter_functions_neon(png_structrp pp, unsigned int bpp) { #ifdef __linux__ if (!png_have_hwcap(HWCAP_NEON)) return; @@ -3720,9 +3837,9 @@ } #endif /* PNG_ARM_NEON */ static void -png_init_filter_functions(png_structp pp) +png_init_filter_functions(png_structrp pp) { unsigned int bpp = (pp->pixel_depth + 7) >> 3; pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub; @@ -3740,9 +3857,9 @@ #endif } void /* PRIVATE */ -png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row, +png_read_filter_row(png_structrp pp, png_row_infop row_info, png_bytep row, png_const_bytep prev_row, int filter) { if (pp->read_filter[0] == NULL) png_init_filter_functions(pp); @@ -3751,9 +3868,183 @@ } #ifdef PNG_SEQUENTIAL_READ_SUPPORTED void /* PRIVATE */ -png_read_finish_row(png_structp png_ptr) +png_read_IDAT_data(png_structrp png_ptr, png_bytep output, + png_alloc_size_t avail_out) +{ + /* Loop reading IDATs and decompressing the result into output[avail_out] */ + png_ptr->zstream.next_out = output; + png_ptr->zstream.avail_out = 0; /* safety: set below */ + + if (output == NULL) + avail_out = 0; + + do + { + int ret; + png_byte tmpbuf[PNG_INFLATE_BUF_SIZE]; + + if (png_ptr->zstream.avail_in == 0) + { + uInt avail_in; + png_bytep buffer; + + while (png_ptr->idat_size == 0) + { + png_crc_finish(png_ptr, 0); + + png_ptr->idat_size = png_read_chunk_header(png_ptr); + /* This is an error even in the 'check' case because the code just + * consumed a non-IDAT header. + */ + if (png_ptr->chunk_name != png_IDAT) + png_error(png_ptr, "Not enough image data"); + } + + avail_in = png_ptr->IDAT_read_size; + + if (avail_in > png_ptr->idat_size) + avail_in = (uInt)png_ptr->idat_size; + + /* A PNG with a gradually increasing IDAT size will defeat this attempt + * to minimize memory usage by causing lots of re-allocs, but + * realistically doing IDAT_read_size re-allocs is not likely to be a + * big problem. + */ + buffer = png_read_buffer(png_ptr, avail_in, 0/*error*/); + + png_crc_read(png_ptr, buffer, avail_in); + png_ptr->idat_size -= avail_in; + + png_ptr->zstream.next_in = buffer; + png_ptr->zstream.avail_in = avail_in; + } + + /* And set up the output side. */ + if (output != NULL) /* standard read */ + { + uInt out = ZLIB_IO_MAX; + + if (out > avail_out) + out = (uInt)avail_out; + + avail_out -= out; + png_ptr->zstream.avail_out = out; + } + + else /* check for end */ + { + png_ptr->zstream.next_out = tmpbuf; + png_ptr->zstream.avail_out = sizeof tmpbuf; + } + + /* Use NO_FLUSH; this gives zlib the maximum opportunity to optimize the + * process. If the LZ stream is truncated the sequential reader will + * terminally damage the stream, above, by reading the chunk header of the + * following chunk (it then exits with png_error). + * + * TODO: deal more elegantly with truncated IDAT lists. + */ + ret = inflate(&png_ptr->zstream, Z_NO_FLUSH); + + /* Take the unconsumed output back (so, in the 'check' case this just + * counts up). + */ + avail_out += png_ptr->zstream.avail_out; + png_ptr->zstream.avail_out = 0; + + if (ret == Z_STREAM_END) + { + /* Do this for safety; we won't read any more into this row. */ + png_ptr->zstream.next_out = NULL; + + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; + + if (png_ptr->zstream.avail_in > 0 || png_ptr->idat_size > 0) + png_chunk_benign_error(png_ptr, "Extra compressed data"); + break; + } + + if (ret != Z_OK) + { + png_zstream_error(png_ptr, ret); + + if (output != NULL) + png_chunk_error(png_ptr, png_ptr->zstream.msg); + + else /* checking */ + { + png_chunk_benign_error(png_ptr, png_ptr->zstream.msg); + return; + } + } + } while (avail_out > 0); + + if (avail_out > 0) + { + /* The stream ended before the image; this is the same as too few IDATs so + * should be handled the same way. + */ + if (output != NULL) + png_error(png_ptr, "Not enough image data"); + + else /* checking */ + png_chunk_benign_error(png_ptr, "Too much image data"); + } +} + +void /* PRIVATE */ +png_read_finish_IDAT(png_structrp png_ptr) +{ + /* We don't need any more data and the stream should have ended, however the + * LZ end code may actually not have been processed. In this case we must + * read it otherwise stray unread IDAT data or, more likely, an IDAT chunk + * may still remain to be consumed. + */ + if (!(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)) + { + /* The NULL causes png_read_IDAT_data to swallow any remaining bytes in + * the compressed stream, but the stream may be damaged too, so even after + * this call we may need to terminate the zstream ownership. + */ + png_read_IDAT_data(png_ptr, NULL, 0); + png_ptr->zstream.next_out = NULL; /* safety */ + + /* Now clear everything out for safety; the following may not have been + * done. + */ + if (!(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)) + { + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; + } + } + + /* If the zstream has not been released do it now *and* terminate the reading + * of the final IDAT chunk. + */ + if (png_ptr->zowner == png_IDAT) + { + /* Always do this; the pointers otherwise point into the read buffer. */ + png_ptr->zstream.next_in = NULL; + png_ptr->zstream.avail_in = 0; + + /* Now we no longer own the zstream. */ + png_ptr->zowner = 0; + + /* The slightly weird semantics of the sequential IDAT reading is that we + * are always in or at the end of an IDAT chunk, so we always need to do a + * crc_finish here. If idat_size is non-zero we also need to read the + * spurious bytes at the end of the chunk now. + */ + (void)png_crc_finish(png_ptr, png_ptr->idat_size); + } +} + +void /* PRIVATE */ +png_read_finish_row(png_structrp png_ptr) { #ifdef PNG_READ_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ @@ -3814,78 +4105,15 @@ return; } #endif /* PNG_READ_INTERLACING_SUPPORTED */ - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - { - char extra; - int ret; - - png_ptr->zstream.next_out = (Byte *)&extra; - png_ptr->zstream.avail_out = (uInt)1; - - for (;;) - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_crc_finish(png_ptr, 0); - png_ptr->idat_size = png_read_chunk_header(png_ptr); - if (png_ptr->chunk_name != png_IDAT) - png_error(png_ptr, "Not enough image data"); - } - - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - - if (ret == Z_STREAM_END) - { - if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_warning(png_ptr, "Extra compressed data"); - - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression Error"); - - if (!(png_ptr->zstream.avail_out)) - { - png_warning(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - } - png_ptr->zstream.avail_out = 0; - } - - if (png_ptr->idat_size || png_ptr->zstream.avail_in) - png_warning(png_ptr, "Extra compression data"); - - inflateReset(&png_ptr->zstream); - - png_ptr->mode |= PNG_AFTER_IDAT; + /* Here after at the end of the last row of the last pass. */ + png_read_finish_IDAT(png_ptr); } #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ void /* PRIVATE */ -png_read_start_row(png_structp png_ptr) +png_read_start_row(png_structrp png_ptr) { #ifdef PNG_READ_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ @@ -3905,9 +4133,9 @@ int max_pixel_depth; png_size_t row_bytes; png_debug(1, "in png_read_start_row"); - png_ptr->zstream.avail_in = 0; + #ifdef PNG_READ_TRANSFORMS_SUPPORTED png_init_read_transformations(png_ptr); #endif #ifdef PNG_READ_INTERLACING_SUPPORTED @@ -4153,7 +4381,28 @@ png_debug1(3, "rowbytes = %lu,", (unsigned long)png_ptr->rowbytes); png_debug1(3, "irowbytes = %lu", (unsigned long)PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1); + /* The sequential reader needs a buffer for IDAT, but the progressive reader + * does not, so free the read buffer now regardless; the sequential reader + * reallocates it on demand. + */ + if (png_ptr->read_buffer) + { + png_bytep buffer = png_ptr->read_buffer; + + png_ptr->read_buffer_size = 0; + png_ptr->read_buffer = NULL; + png_free(png_ptr, buffer); + } + + /* Finally claim the zstream for the inflate of the IDAT data, use the bits + * value from the stream (note that this will result in a fatal error if the + * IDAT stream has a bogus deflate header window_bits value, but this should + * not be happening any longer!) + */ + if (png_inflate_claim(png_ptr, png_IDAT, 0) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); + png_ptr->flags |= PNG_FLAG_ROW_INIT; } #endif /* PNG_READ_SUPPORTED */ diff -ru4NwbB libpng-1.5.10/pngset.c libpng-1.6.0beta22/pngset.c --- libpng-1.5.10/pngset.c 2012-03-29 00:06:54.637034941 -0500 +++ libpng-1.6.0beta22/pngset.c 2012-05-23 12:30:56.196818949 -0500 @@ -1,8 +1,8 @@ /* pngset.c - storage of image information into info struct * - * Last changed in libpng 1.5.10 [(PENDING RELEASE)] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -21,60 +21,60 @@ #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #ifdef PNG_bKGD_SUPPORTED void PNGAPI -png_set_bKGD(png_structp png_ptr, png_infop info_ptr, +png_set_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, png_const_color_16p background) { png_debug1(1, "in %s storage function", "bKGD"); - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || background == NULL) return; - png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16)); + info_ptr->background = *background; info_ptr->valid |= PNG_INFO_bKGD; } #endif #ifdef PNG_cHRM_SUPPORTED void PNGFAPI -png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, +png_set_cHRM_fixed(png_const_structrp png_ptr, png_inforp info_ptr, png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, png_fixed_point blue_y) { + png_xy xy; + png_debug1(1, "in %s storage function", "cHRM fixed"); if (png_ptr == NULL || info_ptr == NULL) return; -# ifdef PNG_CHECK_cHRM_SUPPORTED - if (png_check_cHRM_fixed(png_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) -# endif - { - info_ptr->x_white = white_x; - info_ptr->y_white = white_y; - info_ptr->x_red = red_x; - info_ptr->y_red = red_y; - info_ptr->x_green = green_x; - info_ptr->y_green = green_y; - info_ptr->x_blue = blue_x; - info_ptr->y_blue = blue_y; - info_ptr->valid |= PNG_INFO_cHRM; - } + xy.redx = red_x; + xy.redy = red_y; + xy.greenx = green_x; + xy.greeny = green_y; + xy.bluex = blue_x; + xy.bluey = blue_y; + xy.whitex = white_x; + xy.whitey = white_y; + + if (png_colorspace_set_chromaticities(png_ptr, &info_ptr->colorspace, &xy, + 2/* override with app values*/)) + info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; + + png_colorspace_sync_info(png_ptr, info_ptr); } void PNGFAPI -png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr, +png_set_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, png_fixed_point int_red_Z, png_fixed_point int_green_X, png_fixed_point int_green_Y, png_fixed_point int_green_Z, png_fixed_point int_blue_X, png_fixed_point int_blue_Y, png_fixed_point int_blue_Z) { png_XYZ XYZ; - png_xy xy; png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); if (png_ptr == NULL || info_ptr == NULL) @@ -89,18 +89,17 @@ XYZ.blueX = int_blue_X; XYZ.blueY = int_blue_Y; XYZ.blueZ = int_blue_Z; - if (png_xy_from_XYZ(&xy, XYZ)) - png_error(png_ptr, "XYZ values out of representable range"); + if (png_colorspace_set_endpoints(png_ptr, &info_ptr->colorspace, &XYZ, 2)) + info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; - png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy, - xy.greenx, xy.greeny, xy.bluex, xy.bluey); + png_colorspace_sync_info(png_ptr, info_ptr); } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_cHRM(png_structp png_ptr, png_infop info_ptr, +png_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, double white_x, double white_y, double red_x, double red_y, double green_x, double green_y, double blue_x, double blue_y) { png_set_cHRM_fixed(png_ptr, info_ptr, @@ -114,9 +113,9 @@ png_fixed(png_ptr, blue_y, "cHRM Blue Y")); } void PNGAPI -png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X, +png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X, double red_Y, double red_Z, double green_X, double green_Y, double green_Z, double blue_X, double blue_Y, double blue_Z) { png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, @@ -135,10 +134,10 @@ #endif /* PNG_cHRM_SUPPORTED */ #ifdef PNG_gAMA_SUPPORTED void PNGFAPI -png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point - file_gamma) +png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr, + png_fixed_point file_gamma) { png_debug1(1, "in %s storage function", "gAMA"); if (png_ptr == NULL || info_ptr == NULL) @@ -148,24 +147,27 @@ * occur. Since the fixed point representation is assymetrical it is * possible for 1/gamma to overflow the limit of 21474 and this means the * gamma value must be at least 5/100000 and hence at most 20000.0. For * safety the limits here are a little narrower. The values are 0.00016 to - * 6250.0, which are truly ridiculous gammma values (and will produce + * 6250.0, which are truly ridiculous gamma values (and will produce * displays that are all black or all white.) */ if (file_gamma < 16 || file_gamma > 625000000) - png_warning(png_ptr, "Out of range gamma value ignored"); + png_app_error(png_ptr, "Out of range gamma value ignored"); else { - info_ptr->gamma = file_gamma; - info_ptr->valid |= PNG_INFO_gAMA; + if (png_colorspace_set_gamma(png_ptr, &info_ptr->colorspace, file_gamma, + 2/* overrided with app value */)) + info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_gAMA; + + png_colorspace_sync_info(png_ptr, info_ptr); } } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) +png_set_gAMA(png_const_structrp png_ptr, png_inforp info_ptr, double file_gamma) { png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, "png_set_gAMA")); } @@ -173,9 +175,10 @@ #endif #ifdef PNG_hIST_SUPPORTED void PNGAPI -png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist) +png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr, + png_const_uint_16p hist) { int i; png_debug1(1, "in %s storage function", "hIST"); @@ -196,28 +199,28 @@ /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in * version 1.2.1 */ - png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)); + info_ptr->hist = png_voidcast(png_uint_16p, png_malloc_warn(png_ptr, + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16))); - if (png_ptr->hist == NULL) + if (info_ptr->hist == NULL) { png_warning(png_ptr, "Insufficient memory for hIST chunk data"); return; } + info_ptr->free_me |= PNG_FREE_HIST; + for (i = 0; i < info_ptr->num_palette; i++) - png_ptr->hist[i] = hist[i]; + info_ptr->hist[i] = hist[i]; - info_ptr->hist = png_ptr->hist; info_ptr->valid |= PNG_INFO_hIST; - info_ptr->free_me |= PNG_FREE_HIST; } #endif void PNGAPI -png_set_IHDR(png_structp png_ptr, png_infop info_ptr, +png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type) { @@ -265,9 +268,9 @@ } #ifdef PNG_oFFs_SUPPORTED void PNGAPI -png_set_oFFs(png_structp png_ptr, png_infop info_ptr, +png_set_oFFs(png_const_structrp png_ptr, png_inforp info_ptr, png_int_32 offset_x, png_int_32 offset_y, int unit_type) { png_debug1(1, "in %s storage function", "oFFs"); @@ -282,18 +285,19 @@ #endif #ifdef PNG_pCAL_SUPPORTED void PNGAPI -png_set_pCAL(png_structp png_ptr, png_infop info_ptr, +png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_const_charp units, png_charpp params) { png_size_t length; int i; png_debug1(1, "in %s storage function", "pCAL"); - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL + || (nparams > 0 && params == NULL)) return; length = png_strlen(purpose) + 1; png_debug1(3, "allocating purpose for info (%lu bytes)", @@ -304,14 +308,19 @@ /* Check that the type matches the specification. */ if (type < 0 || type > 3) png_error(png_ptr, "Invalid pCAL equation type"); + if (nparams < 0 || nparams > 255) + png_error(png_ptr, "Invalid pCAL parameter count"); + /* Validate params[nparams] */ for (i=0; ipcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); + info_ptr->pcal_purpose = png_voidcast(png_charp, + png_malloc_warn(png_ptr, length)); if (info_ptr->pcal_purpose == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL purpose"); @@ -329,9 +338,10 @@ length = png_strlen(units) + 1; png_debug1(3, "allocating units for info (%lu bytes)", (unsigned long)length); - info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); + info_ptr->pcal_units = png_voidcast(png_charp, + png_malloc_warn(png_ptr, length)); if (info_ptr->pcal_units == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL units"); @@ -339,10 +349,10 @@ } png_memcpy(info_ptr->pcal_units, units, length); - info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, - (png_size_t)((nparams + 1) * png_sizeof(png_charp))); + info_ptr->pcal_params = png_voidcast(png_charpp, png_malloc_warn(png_ptr, + (png_size_t)((nparams + 1) * png_sizeof(png_charp)))); if (info_ptr->pcal_params == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL params"); @@ -374,9 +384,9 @@ #endif #ifdef PNG_sCAL_SUPPORTED void PNGAPI -png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, +png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr, int unit, png_const_charp swidth, png_const_charp sheight) { png_size_t lengthw = 0, lengthh = 0; @@ -404,9 +414,10 @@ ++lengthw; png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); - info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw); + info_ptr->scal_s_width = png_voidcast(png_charp, + png_malloc_warn(png_ptr, lengthw)); if (info_ptr->scal_s_width == NULL) { png_warning(png_ptr, "Memory allocation failed while processing sCAL"); @@ -418,9 +429,10 @@ ++lengthh; png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); - info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh); + info_ptr->scal_s_height = png_voidcast(png_charp, + png_malloc_warn(png_ptr, lengthh)); if (info_ptr->scal_s_height == NULL) { png_free (png_ptr, info_ptr->scal_s_width); @@ -437,10 +449,10 @@ } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, - double height) +png_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit, + double width, double height) { png_debug1(1, "in %s storage function", "sCAL"); /* Check the arguments. */ @@ -467,9 +479,9 @@ # endif # ifdef PNG_FIXED_POINT_SUPPORTED void PNGAPI -png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, +png_set_sCAL_fixed(png_const_structrp png_ptr, png_inforp info_ptr, int unit, png_fixed_point width, png_fixed_point height) { png_debug1(1, "in %s storage function", "sCAL"); @@ -496,9 +508,9 @@ #endif #ifdef PNG_pHYs_SUPPORTED void PNGAPI -png_set_pHYs(png_structp png_ptr, png_infop info_ptr, +png_set_pHYs(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type) { png_debug1(1, "in %s storage function", "pHYs"); @@ -512,15 +524,15 @@ } #endif void PNGAPI -png_set_PLTE(png_structp png_ptr, png_infop info_ptr, +png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr, png_const_colorp palette, int num_palette) { png_debug1(1, "in %s storage function", "PLTE"); - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || palette == NULL) return; if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) { @@ -536,17 +548,20 @@ /* It may not actually be necessary to set png_ptr->palette here; * we do it for backward compatibility with the way the png_handle_tRNS * function used to do the allocation. + * + * 1.6.0: the above statement appears to be incorrect; something has to set + * the palette inside png_struct on read. */ png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead * of num_palette entries, in case of an invalid PNG file that has * too-large sample values. */ - png_ptr->palette = (png_colorp)png_calloc(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); + png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr, + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color))); png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); info_ptr->palette = png_ptr->palette; info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; @@ -557,65 +572,61 @@ } #ifdef PNG_sBIT_SUPPORTED void PNGAPI -png_set_sBIT(png_structp png_ptr, png_infop info_ptr, +png_set_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, png_const_color_8p sig_bit) { png_debug1(1, "in %s storage function", "sBIT"); - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || sig_bit == NULL) return; - png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8)); + info_ptr->sig_bit = *sig_bit; info_ptr->valid |= PNG_INFO_sBIT; } #endif #ifdef PNG_sRGB_SUPPORTED void PNGAPI -png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent) +png_set_sRGB(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) { png_debug1(1, "in %s storage function", "sRGB"); if (png_ptr == NULL || info_ptr == NULL) return; - info_ptr->srgb_intent = (png_byte)srgb_intent; - info_ptr->valid |= PNG_INFO_sRGB; + (void)png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent, + 2/* app value overrides*/); + + png_colorspace_sync_info(png_ptr, info_ptr); } void PNGAPI -png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, +png_set_sRGB_gAMA_and_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) { png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); if (png_ptr == NULL || info_ptr == NULL) return; - png_set_sRGB(png_ptr, info_ptr, srgb_intent); - -# ifdef PNG_gAMA_SUPPORTED - png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); -# endif + if (png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent, + 2/* app value overrides*/)) + { + /* And cause the gAMA and cHRM to be written too */ + info_ptr->colorspace.flags |= + PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; + } -# ifdef PNG_cHRM_SUPPORTED - png_set_cHRM_fixed(png_ptr, info_ptr, - /* color x y */ - /* white */ 31270, 32900, - /* red */ 64000, 33000, - /* green */ 30000, 60000, - /* blue */ 15000, 6000 - ); -# endif /* cHRM */ + png_colorspace_sync_info(png_ptr, info_ptr); } #endif /* sRGB */ #ifdef PNG_iCCP_SUPPORTED void PNGAPI -png_set_iCCP(png_structp png_ptr, png_infop info_ptr, +png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr, png_const_charp name, int compression_type, png_const_bytep profile, png_uint_32 proflen) { png_charp new_iccp_name; @@ -626,48 +637,67 @@ if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) return; + if (compression_type != PNG_COMPRESSION_TYPE_BASE) + png_app_error(png_ptr, "Invalid iCCP compression method"); + + /* Set the colorspace first because this validates the profile; do not + * override previously set app cHRM or gAMA here (because likely as not the + * application knows better than libpng what the correct values are.) + */ + { + int result = png_colorspace_set_ICC(png_ptr, &info_ptr->colorspace, name, + proflen, profile, 0/* do *not* override the app cHRM or gAMA */); + + png_colorspace_sync_info(png_ptr, info_ptr); + + /* Don't do any of the copying if the profile was bad, or inconsistent. */ + if (!result) + return; + + /* But do write the gAMA and cHRM chunks from the profile. */ + info_ptr->colorspace.flags |= + PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; + } + length = png_strlen(name)+1; - new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); + new_iccp_name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length)); if (new_iccp_name == NULL) { - png_warning(png_ptr, "Insufficient memory to process iCCP chunk"); + png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk"); return; } png_memcpy(new_iccp_name, name, length); - new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen); + new_iccp_profile = png_voidcast(png_bytep, + png_malloc_warn(png_ptr, proflen)); if (new_iccp_profile == NULL) { png_free (png_ptr, new_iccp_name); - png_warning(png_ptr, + png_benign_error(png_ptr, "Insufficient memory to process iCCP profile"); return; } - png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); + png_memcpy(new_iccp_profile, profile, proflen); png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); info_ptr->iccp_proflen = proflen; info_ptr->iccp_name = new_iccp_name; info_ptr->iccp_profile = new_iccp_profile; - /* Compression is always zero but is here so the API and info structure - * does not have to change if we introduce multiple compression types - */ - info_ptr->iccp_compression = (png_byte)compression_type; info_ptr->free_me |= PNG_FREE_ICCP; info_ptr->valid |= PNG_INFO_iCCP; } #endif #ifdef PNG_TEXT_SUPPORTED void PNGAPI -png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, - int num_text) +png_set_text(png_const_structrp png_ptr, png_inforp info_ptr, + png_const_textp text_ptr, int num_text) { int ret; ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); @@ -675,9 +705,9 @@ png_error(png_ptr, "Insufficient memory to store text"); } int /* PRIVATE */ -png_set_text_2(png_structp png_ptr, png_infop info_ptr, +png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr, png_const_textp text_ptr, int num_text) { int i; @@ -864,13 +894,14 @@ #endif #ifdef PNG_tIME_SUPPORTED void PNGAPI -png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) +png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr, + png_const_timep mod_time) { png_debug1(1, "in %s storage function", "tIME"); - if (png_ptr == NULL || info_ptr == NULL || + if (png_ptr == NULL || info_ptr == NULL || mod_time == NULL || (png_ptr->mode & PNG_WROTE_tIME)) return; if (mod_time->month == 0 || mod_time->month > 12 || @@ -881,16 +912,16 @@ png_warning(png_ptr, "Ignoring invalid time value"); return; } - png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time)); + info_ptr->mod_time = *mod_time; info_ptr->valid |= PNG_INFO_tIME; } #endif #ifdef PNG_tRNS_SUPPORTED void PNGAPI -png_set_tRNS(png_structp png_ptr, png_infop info_ptr, +png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) { png_debug1(1, "in %s storage function", "tRNS"); @@ -901,15 +932,19 @@ { /* It may not actually be necessary to set png_ptr->trans_alpha here; * we do it for backward compatibility with the way the png_handle_tRNS * function used to do the allocation. + * + * 1.6.0: The above statement is incorrect; png_handle_tRNS effectively + * relies on png_set_tRNS storing the information in png_struct + * (otherwise it won't be there for the code in pngrtran.c). */ png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ - png_ptr->trans_alpha = info_ptr->trans_alpha = - (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH); + png_ptr->trans_alpha = info_ptr->trans_alpha = png_voidcast(png_bytep, + png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH)); if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); } @@ -918,18 +953,17 @@ { int sample_max = (1 << info_ptr->bit_depth); if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && - (int)trans_color->gray > sample_max) || + trans_color->gray > sample_max) || (info_ptr->color_type == PNG_COLOR_TYPE_RGB && - ((int)trans_color->red > sample_max || - (int)trans_color->green > sample_max || - (int)trans_color->blue > sample_max))) + (trans_color->red > sample_max || + trans_color->green > sample_max || + trans_color->blue > sample_max))) png_warning(png_ptr, "tRNS chunk has out-of-range samples for bit_depth"); - png_memcpy(&(info_ptr->trans_color), trans_color, - png_sizeof(png_color_16)); + info_ptr->trans_color = *trans_color; if (num_trans == 0) num_trans = 1; } @@ -945,10 +979,10 @@ #endif #ifdef PNG_sPLT_SUPPORTED void PNGAPI -png_set_sPLT(png_structp png_ptr, - png_infop info_ptr, png_const_sPLT_tp entries, int nentries) +png_set_sPLT(png_const_structrp png_ptr, + png_inforp info_ptr, png_const_sPLT_tp entries, int nentries) /* * entries - array of png_sPLT_t structures * to be added to the list of palettes * in the info structure. @@ -959,14 +993,14 @@ { png_sPLT_tp np; int i; - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || + entries == NULL) return; - np = (png_sPLT_tp)png_malloc_warn(png_ptr, - (info_ptr->splt_palettes_num + nentries) * - (png_size_t)png_sizeof(png_sPLT_t)); + np = png_voidcast(png_sPLT_tp, png_malloc_warn(png_ptr, + (info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t))); if (np == NULL) { png_warning(png_ptr, "No memory for sPLT palettes"); @@ -978,16 +1012,28 @@ png_free(png_ptr, info_ptr->splt_palettes); info_ptr->splt_palettes=NULL; + /* TODO: fix this, it apparently leaves NULL entries in the event of OOM + * below. + */ for (i = 0; i < nentries; i++) { png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; png_const_sPLT_tp from = entries + i; png_size_t length; + /* In event of error below the name and entries fields must be set to + * NULL, otherwise libpng will crash later on while trying to free the + * uninitialized pointers. + */ + png_memset(to, 0, sizeof *to); + + if (from->name == NULL || from->entries == NULL) + continue; + length = png_strlen(from->name) + 1; - to->name = (png_charp)png_malloc_warn(png_ptr, length); + to->name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length)); if (to->name == NULL) { png_warning(png_ptr, @@ -995,15 +1041,14 @@ continue; } png_memcpy(to->name, from->name, length); - to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, - from->nentries * png_sizeof(png_sPLT_entry)); + to->entries = png_voidcast(png_sPLT_entryp, png_malloc_warn(png_ptr, + from->nentries * png_sizeof(png_sPLT_entry))); if (to->entries == NULL) { - png_warning(png_ptr, - "Out of memory while processing sPLT chunk"); + png_warning(png_ptr, "Out of memory while processing sPLT chunk"); png_free(png_ptr, to->name); to->name = NULL; continue; } @@ -1023,20 +1068,20 @@ #endif /* PNG_sPLT_SUPPORTED */ #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED void PNGAPI -png_set_unknown_chunks(png_structp png_ptr, - png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) +png_set_unknown_chunks(png_const_structrp png_ptr, + png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) { png_unknown_chunkp np; int i; if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) return; - np = (png_unknown_chunkp)png_malloc_warn(png_ptr, + np = png_voidcast(png_unknown_chunkp, png_malloc_warn(png_ptr, (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) * - png_sizeof(png_unknown_chunk)); + png_sizeof(png_unknown_chunk))); if (np == NULL) { png_warning(png_ptr, @@ -1060,9 +1105,9 @@ to->name[png_sizeof(to->name)-1] = '\0'; to->size = from->size; /* Note our location in the read or write sequence */ - to->location = (png_byte)(png_ptr->mode & 0xff); + to->location = (png_byte)png_ptr->mode; if (from->size == 0) to->data=NULL; @@ -1088,9 +1133,9 @@ info_ptr->free_me |= PNG_FREE_UNKN; } void PNGAPI -png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, +png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location) { if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < info_ptr->unknown_chunks_num) @@ -1100,33 +1145,32 @@ #ifdef PNG_MNG_FEATURES_SUPPORTED png_uint_32 PNGAPI -png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) +png_permit_mng_features (png_structrp png_ptr, png_uint_32 mng_features) { png_debug(1, "in png_permit_mng_features"); if (png_ptr == NULL) - return (png_uint_32)0; + return 0; - png_ptr->mng_features_permitted = - (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); + png_ptr->mng_features_permitted = mng_features & PNG_ALL_MNG_FEATURES; - return (png_uint_32)png_ptr->mng_features_permitted; + return png_ptr->mng_features_permitted; } #endif #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED void PNGAPI -png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep - chunk_list, int num_chunks) +png_set_keep_unknown_chunks(png_structrp png_ptr, int keep, + png_const_bytep chunk_list, int num_chunksIn) { png_bytep new_list, p; - int i, old_num_chunks; + unsigned int i, num_chunks, old_num_chunks; if (png_ptr == NULL) return; - if (num_chunks == 0) + if (num_chunksIn <= 0) { if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; @@ -1144,22 +1188,24 @@ if (chunk_list == NULL) return; + /* The argument is >0 */ + num_chunks = (unsigned int)num_chunksIn; + old_num_chunks = png_ptr->num_chunk_list; - new_list=(png_bytep)png_malloc(png_ptr, - (png_size_t)(5*(num_chunks + old_num_chunks))); + new_list = png_voidcast(png_bytep, png_malloc(png_ptr, + 5 * (num_chunks + old_num_chunks))); if (png_ptr->chunk_list != NULL) { - png_memcpy(new_list, png_ptr->chunk_list, - (png_size_t)(5*old_num_chunks)); + png_memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); png_free(png_ptr, png_ptr->chunk_list); png_ptr->chunk_list=NULL; } png_memcpy(new_list + 5*old_num_chunks, chunk_list, - (png_size_t)(5*num_chunks)); + 5*(unsigned int)num_chunks); for (p = new_list + 5*old_num_chunks + 4, i = 0; izbuf); + if (size == 0 || size > PNG_UINT_31_MAX) + png_error(png_ptr, "invalid compression buffer size"); - if (size > ZLIB_IO_MAX) +# ifdef PNG_SEQUENTIAL_READ_SUPPORTED + if (png_ptr->mode & PNG_IS_READ_STRUCT) { - png_warning(png_ptr, "Attempt to set buffer size beyond max ignored"); - png_ptr->zbuf_size = ZLIB_IO_MAX; - size = ZLIB_IO_MAX; /* must fit */ + png_ptr->IDAT_read_size = (png_uint_32)size; /* checked above */ + return; } +# endif - else - png_ptr->zbuf_size = (uInt)size; +# ifdef PNG_WRITE_SUPPORTED + if (!(png_ptr->mode & PNG_IS_READ_STRUCT)) + { + if (png_ptr->zowner != 0) + { + png_warning(png_ptr, + "Compression buffer size cannot be changed because it is in use"); + return; + } - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); + if (size > ZLIB_IO_MAX) + { + png_warning(png_ptr, + "Compression buffer size limited to system maximum"); + size = ZLIB_IO_MAX; /* must fit */ + } - /* The following ensures a relatively safe failure if this gets called while - * the buffer is actually in use. + else if (size < 6) + { + /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH + * if this is permitted. */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = 0; - png_ptr->zstream.avail_in = 0; + png_warning(png_ptr, + "Compression buffer size cannot be reduced below 6"); + return; + } + + if (png_ptr->zbuffer_size != size) + { + png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); + png_ptr->zbuffer_size = (uInt)size; + } + } +# endif } void PNGAPI -png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) +png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask) { if (png_ptr && info_ptr) info_ptr->valid &= ~mask; } @@ -1238,13 +1310,12 @@ info_ptr->valid &= ~mask; } - #ifdef PNG_SET_USER_LIMITS_SUPPORTED /* This function was added to libpng 1.2.6 */ void PNGAPI -png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, +png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max) { /* Images with dimensions larger than these limits will be * rejected by png_set_IHDR(). To accept any PNG datastream @@ -1258,18 +1329,17 @@ } /* This function was added to libpng 1.4.0 */ void PNGAPI -png_set_chunk_cache_max (png_structp png_ptr, - png_uint_32 user_chunk_cache_max) +png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max) { if (png_ptr) png_ptr->user_chunk_cache_max = user_chunk_cache_max; } /* This function was added to libpng 1.4.1 */ void PNGAPI -png_set_chunk_malloc_max (png_structp png_ptr, +png_set_chunk_malloc_max (png_structrp png_ptr, png_alloc_size_t user_chunk_malloc_max) { if (png_ptr) png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; @@ -1278,28 +1348,36 @@ #ifdef PNG_BENIGN_ERRORS_SUPPORTED void PNGAPI -png_set_benign_errors(png_structp png_ptr, int allowed) +png_set_benign_errors(png_structrp png_ptr, int allowed) { png_debug(1, "in png_set_benign_errors"); + /* If allowed is 1, png_benign_error() is treated as a warning. + * + * If allowed is 0, png_benign_error() is treated as an error (which + * is the default behavior if png_set_benign_errors() is not called). + */ + if (allowed) - png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN | + PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN; else - png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN; + png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN | + PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN); } #endif /* PNG_BENIGN_ERRORS_SUPPORTED */ -#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED +#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED /* Do not report invalid palette index; added at libng-1.5.10 */ void PNGAPI -png_set_check_for_invalid_index(png_structp png_ptr, int allowed) +png_set_check_for_invalid_index(png_structrp png_ptr, int allowed) { png_debug(1, "in png_set_check_for_invalid_index"); - if (allowed) + if (allowed > 0) png_ptr->num_palette_max = 0; else png_ptr->num_palette_max = -1; diff -ru4NwbB libpng-1.5.10/pngstruct.h libpng-1.6.0beta22/pngstruct.h --- libpng-1.5.10/pngstruct.h 2012-03-29 00:06:54.503385638 -0500 +++ libpng-1.6.0beta22/pngstruct.h 2012-05-23 12:30:56.064538396 -0500 @@ -1,12 +1,12 @@ /* pngstruct.h - header file for PNG reference library * - * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * - * Last changed in libpng 1.5.9 [(PENDING RELEASE)] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer * and license in png.h @@ -23,15 +23,130 @@ /* zlib.h defines the structure z_stream, an instance of which is included * in this structure and is required for decompressing the LZ compressed * data in PNG files. */ +#ifndef ZLIB_CONST + /* We must ensure that zlib uses 'const' in declarations. */ +# define ZLIB_CONST +#endif #include "zlib.h" +#ifdef const + /* zlib.h sometimes #defines const to nothing, undo this. */ +# undef const +#endif + +/* zlib.h has mediocre z_const use before 1.2.6, this stuff is for compatibility + * with older builds. + */ +#if ZLIB_VERNUM < 0x1260 +# define PNGZ_MSG_CAST(s) png_constcast(char*,s) +# define PNGZ_INPUT_CAST(b) png_constcast(png_bytep,b) +#else +# define PNGZ_MSG_CAST(s) (s) +# define PNGZ_INPUT_CAST(b) (b) +#endif + +/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib + * can handle at once. This type need be no larger than 16 bits (so maximum of + * 65535), this define allows us to discover how big it is, but limited by the + * maximuum for png_size_t. The value can be overriden in a library build + * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably + * lower value (e.g. 255 works). A lower value may help memory usage (slightly) + * and may even improve performance on some systems (and degrade it on others.) + */ +#ifndef ZLIB_IO_MAX +# define ZLIB_IO_MAX ((uInt)-1) +#endif + +#ifdef PNG_WRITE_SUPPORTED +/* The type of a compression buffer list used by the write code. */ +typedef struct png_compression_buffer +{ + struct png_compression_buffer *next; + png_byte output[1]; /* actually zbuf_size */ +} png_compression_buffer, *png_compression_bufferp; + +#define PNG_COMPRESSION_BUFFER_SIZE(pp)\ + (offsetof(png_compression_buffer, output) + (pp)->zbuffer_size) +#endif + +/* Colorspace support; structures used in png_struct, png_info and in internal + * functions to hold and communicate information about the color space. + * + * PNG_COLORSPACE_SUPPORTED is only required if the application will perform + * colorspace corrections, otherwise all the colorspace information can be + * skipped and the size of libpng can be reduced (significantly) by compiling + * out the colorspace support. + */ +#ifdef PNG_COLORSPACE_SUPPORTED +/* The chromaticities of the red, green and blue colorants and the chromaticity + * of the corresponding white point (i.e. of rgb(1.0,1.0,1.0)). + */ +typedef struct png_xy +{ + png_fixed_point redx, redy; + png_fixed_point greenx, greeny; + png_fixed_point bluex, bluey; + png_fixed_point whitex, whitey; +} png_xy; + +/* The same data as above but encoded as CIE XYZ values. When this data comes + * from chromaticities the sum of the Y values is assumed to be 1.0 + */ +typedef struct png_XYZ +{ + png_fixed_point redX, redY, redZ; + png_fixed_point greenX, greenY, greenZ; + png_fixed_point blueX, blueY, blueZ; +} png_XYZ; +#endif /* COLORSPACE */ + +#if defined PNG_COLORSPACE_SUPPORTED || defined PNG_GAMMA_SUPPORTED +/* A colorspace is all the above plus, potentially, profile information, + * however at present libpng does not use the profile internally so it is only + * stored in the png_info struct (if iCCP is supported.) The rendering intent + * is retained here and is checked. + * + * The file gamma encoding information is also stored here and gamma correction + * is done by libpng, whereas color correction must currently be done by the + * application. + */ +typedef struct png_colorspace +{ +#ifdef PNG_GAMMA_SUPPORTED + png_fixed_point gamma; /* File gamma */ +#endif + +#ifdef PNG_COLORSPACE_SUPPORTED + png_xy end_points_xy; /* End points as chromaticities */ + png_XYZ end_points_XYZ; /* End points as CIE XYZ colorant values */ + png_uint_16 rendering_intent; /* Rendering intent of a profile */ +#endif + + /* Flags are always defined to simplify the code. */ + png_uint_16 flags; /* As defined below */ +} png_colorspace, * PNG_RESTRICT png_colorspacerp; + +typedef const png_colorspace * PNG_RESTRICT png_const_colorspacerp; + +#define PNG_COLORSPACE_HAVE_GAMMA 0x0001 +#define PNG_COLORSPACE_HAVE_ENDPOINTS 0x0002 +#define PNG_COLORSPACE_HAVE_INTENT 0x0004 +#define PNG_COLORSPACE_FROM_gAMA 0x0008 +#define PNG_COLORSPACE_FROM_cHRM 0x0010 +#define PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB 0x0020 +#define PNG_COLORSPACE_MATCHES_sRGB 0x0040 /* exact match on profile */ +#define PNG_COLORSPACE_INVALID 0x8000 +#define PNG_COLORSPACE_CANCEL(flags) (0xffff ^ (flags)) +#endif /* COLORSPACE || GAMMA */ struct png_struct_def { #ifdef PNG_SETJMP_SUPPORTED - jmp_buf longjmp_buffer; /* used in png_error */ + jmp_buf jmp_buf_local; /* New name in 1.6.0 for jmp_buf in png_struct */ png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */ + jmp_buf *jmp_buf_ptr; /* passed to longjmp_fn */ + size_t jmp_buf_size; /* size of the above, if allocated */ #endif png_error_ptr error_fn; /* function for printing errors and aborting */ #ifdef PNG_WARNINGS_SUPPORTED png_error_ptr warning_fn; /* function for printing warnings */ @@ -62,41 +177,38 @@ png_uint_32 mode; /* tells us where we are in the PNG file */ png_uint_32 flags; /* flags indicating various things to libpng */ png_uint_32 transformations; /* which transformations to perform */ - z_stream zstream; /* pointer to decompression structure (below) */ - png_bytep zbuf; /* buffer for zlib */ - uInt zbuf_size; /* size of zbuf (typically 65536) */ -#ifdef PNG_WRITE_SUPPORTED - -/* Added in 1.5.4: state to keep track of whether the zstream has been - * initialized and if so whether it is for IDAT or some other chunk. - */ -#define PNG_ZLIB_UNINITIALIZED 0 -#define PNG_ZLIB_FOR_IDAT 1 -#define PNG_ZLIB_FOR_TEXT 2 /* anything other than IDAT */ -#define PNG_ZLIB_USE_MASK 3 /* bottom two bits */ -#define PNG_ZLIB_IN_USE 4 /* a flag value */ + png_uint_32 zowner; /* ID (chunk type) of zstream owner, 0 if none */ + z_stream zstream; /* decompression structure */ - png_uint_32 zlib_state; /* State of zlib initialization */ -/* End of material added at libpng 1.5.4 */ +#ifdef PNG_WRITE_SUPPORTED + png_compression_bufferp zbuffer_list; /* Created on demand during write */ + uInt zbuffer_size; /* size of the actual buffer */ int zlib_level; /* holds zlib compression level */ int zlib_method; /* holds zlib compression method */ int zlib_window_bits; /* holds zlib compression window bits */ int zlib_mem_level; /* holds zlib compression memory level */ int zlib_strategy; /* holds zlib compression strategy */ #endif /* Added at libpng 1.5.4 */ -#if defined(PNG_WRITE_COMPRESSED_TEXT_SUPPORTED) || \ - defined(PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED) +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED int zlib_text_level; /* holds zlib compression level */ int zlib_text_method; /* holds zlib compression method */ int zlib_text_window_bits; /* holds zlib compression window bits */ int zlib_text_mem_level; /* holds zlib compression memory level */ int zlib_text_strategy; /* holds zlib compression strategy */ #endif /* End of material added at libpng 1.5.4 */ +/* Added at libpng 1.6.0 */ +#ifdef PNG_WRITE_SUPPORTED + int zlib_set_level; /* Actual values set into the zstream on write */ + int zlib_set_method; + int zlib_set_window_bits; + int zlib_set_mem_level; + int zlib_set_strategy; +#endif png_uint_32 width; /* width of image in pixels */ png_uint_32 height; /* height of image in pixels */ png_uint_32 num_rows; /* number of rows in current pass */ @@ -110,12 +222,14 @@ */ png_bytep row_buf; /* buffer to save current (unfiltered) row. * This is a pointer into big_row_buf */ +#ifdef PNG_WRITE_SUPPORTED png_bytep sub_row; /* buffer to save "sub" row when filtering */ png_bytep up_row; /* buffer to save "up" row when filtering */ png_bytep avg_row; /* buffer to save "avg" row when filtering */ png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */ +#endif png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */ png_uint_32 idat_size; /* current IDAT size for read */ png_uint_32 crc; /* current chunk CRC value */ @@ -143,11 +257,8 @@ png_byte maximum_pixel_depth; /* pixel depth used for the row buffers */ png_byte transformed_pixel_depth; /* pixel depth after read/write transforms */ - png_byte io_chunk_string[5]; - /* string name of chunk */ - #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) png_uint_16 filler; /* filler bytes for pixel expansion */ #endif @@ -168,9 +279,8 @@ #endif #ifdef PNG_READ_GAMMA_SUPPORTED int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */ - png_fixed_point gamma; /* file gamma value */ png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */ png_bytep gamma_table; /* gamma table for 8-bit depth files */ png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */ @@ -232,12 +342,8 @@ png_bytep palette_lookup; /* lookup table for quantizing */ png_bytep quantize_index; /* index translation for palette files */ #endif -#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED) - png_uint_16p hist; /* histogram */ -#endif - #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED png_byte heuristic_method; /* heuristic for row filter selection */ png_byte num_prev_filters; /* number of weights for previous rows */ png_bytep prev_filters; /* filter type(s) of previous row(s) */ @@ -246,11 +352,13 @@ png_uint_16p filter_costs; /* relative filter calculation cost */ png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */ #endif +#if PNG_LIBPNG_VER < 10700 #ifdef PNG_TIME_RFC1123_SUPPORTED char time_buffer[29]; /* String to hold RFC 1123 time text */ #endif +#endif /* New members added in libpng-1.0.6 */ png_uint_32 free_me; /* flags items libpng is responsible for freeing */ @@ -260,17 +368,12 @@ png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */ #endif #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - int num_chunk_list; + unsigned int num_chunk_list; png_bytep chunk_list; #endif -#ifdef PNG_READ_sRGB_SUPPORTED - /* Added in 1.5.5 to record an sRGB chunk in the png. */ - png_byte is_sRGB; -#endif - /* New members added in libpng-1.0.3 */ #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED png_byte rgb_to_gray_status; /* Added in libpng 1.5.5 to record setting of coefficients: */ @@ -332,17 +435,27 @@ #endif /* New member added in libpng-1.0.25 and 1.2.17 */ #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - /* Storage for unknown chunk that the library doesn't recognize. */ + /* Temporary storage for unknown chunk that the library doesn't recognize, + * used while reading the chunk. + */ +#ifdef PNG_READ_SUPPORTED png_unknown_chunk unknown_chunk; #endif +#endif /* New member added in libpng-1.2.26 */ png_size_t old_big_row_buf_size; +#ifdef PNG_READ_SUPPORTED /* New member added in libpng-1.2.30 */ - png_charp chunkdata; /* buffer for reading chunk data */ + png_bytep read_buffer; /* buffer for reading chunk data */ + png_alloc_size_t read_buffer_size; /* current size of the buffer */ +#endif +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED + uInt IDAT_read_size; /* limit on read buffer size for IDAT */ +#endif #ifdef PNG_IO_STATE_SUPPORTED /* New member added in libpng-1.4.0 */ png_uint_32 io_state; @@ -352,6 +465,12 @@ png_bytep big_prev_row; void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info, png_bytep row, png_const_bytep prev_row); + +#ifdef PNG_READ_SUPPORTED +#if defined PNG_COLORSPACE_SUPPORTED || defined PNG_GAMMA_SUPPORTED + png_colorspace colorspace; +#endif +#endif }; #endif /* PNGSTRUCT_H */ diff -ru4NwbB libpng-1.5.10/pngtest.c libpng-1.6.0beta22/pngtest.c --- libpng-1.5.10/pngtest.c 2012-03-29 00:06:54.646988879 -0500 +++ libpng-1.6.0beta22/pngtest.c 2012-05-23 12:30:56.206331477 -0500 @@ -1,9 +1,9 @@ /* pngtest.c - a simple test program to test libpng * - * Last changed in libpng 1.5.6 [November 3, 2011] - * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * * This code is released under the libpng license. @@ -66,19 +66,8 @@ #if !PNG_DEBUG # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */ #endif -/* The code uses memcmp and memcpy on large objects (typically row pointers) so - * it is necessary to do soemthing special on certain architectures, note that - * the actual support for this was effectively removed in 1.4, so only the - * memory remains in this program: - */ -#define CVT_PTR(ptr) (ptr) -#define CVT_PTR_NOCHECK(ptr) (ptr) -#define png_memcmp memcmp -#define png_memcpy memcpy -#define png_memset memset - /* Turn on CPU timing #define PNGTEST_TIMING */ @@ -99,10 +88,8 @@ static int verbose = 0; static int strict = 0; -int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname)); - #ifdef __TURBOC__ #include #endif @@ -119,11 +106,9 @@ static int status_pass = 1; static int status_dots_requested = 0; static int status_dots = 1; -void PNGCBAPI -read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass); -void PNGCBAPI +static void PNGCBAPI read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) { if (png_ptr == NULL || row_number > PNG_UINT_31_MAX) return; @@ -145,11 +130,9 @@ fprintf(stdout, "r"); } -void PNGCBAPI -write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass); -void PNGCBAPI +static void PNGCBAPI write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) { if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7) return; @@ -163,11 +146,9 @@ * but merely examine the row filters. We set this to 256 rather than * 5 in case illegal filter values are present.) */ static png_uint_32 filters_used[256]; -void PNGCBAPI -count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data); -void PNGCBAPI +static void PNGCBAPI count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data) { if (png_ptr != NULL && row_info != NULL) ++filters_used[*(data - 1)]; @@ -180,11 +161,9 @@ */ static png_uint_32 zero_samples; -void PNGCBAPI -count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data); -void PNGCBAPI +static void PNGCBAPI count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data) { png_bytep dp = data; if (png_ptr == NULL) @@ -343,9 +322,8 @@ png_error(png_ptr, "Bad I/O state or buffer size"); } #endif -#ifndef USE_FAR_KEYWORD static void PNGCBAPI pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check = 0; @@ -368,61 +346,8 @@ #ifdef PNG_IO_STATE_SUPPORTED pngtest_check_io_state(png_ptr, length, PNG_IO_READING); #endif } -#else -/* This is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void PNGCBAPI -pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_size_t check; - png_byte *n_data; - png_FILE_p io_ptr; - - /* Check if data really is near. If so, use usual code. */ - n_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr)); - if ((png_bytep)n_data == data) - { - check = fread(n_data, 1, length, io_ptr); - } - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t read, remaining, err; - check = 0; - remaining = length; - - do - { - read = MIN(NEAR_BUF_SIZE, remaining); - err = fread(buf, 1, 1, io_ptr); - png_memcpy(data, buf, read); /* Copy far buffer to near buffer */ - if (err != read) - break; - else - check += err; - data += read; - remaining -= read; - } - while (remaining != 0); - } - - if (check != length) - png_error(png_ptr, "Read Error"); - -#ifdef PNG_IO_STATE_SUPPORTED - pngtest_check_io_state(png_ptr, length, PNG_IO_READING); -#endif -} -#endif /* USE_FAR_KEYWORD */ #ifdef PNG_WRITE_FLUSH_SUPPORTED static void PNGCBAPI pngtest_flush(png_structp png_ptr) @@ -436,9 +361,8 @@ * not writing to a standard C stream, you should create a replacement * write_data function and use it at run time with png_set_write_fn(), rather * than changing the library. */ -#ifndef USE_FAR_KEYWORD static void PNGCBAPI pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; @@ -453,65 +377,8 @@ #ifdef PNG_IO_STATE_SUPPORTED pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING); #endif } -#else -/* This is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void PNGCBAPI -pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_size_t check; - png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */ - png_FILE_p io_ptr; - - /* Check if data really is near. If so, use usual code. */ - near_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr)); - - if ((png_bytep)near_data == data) - { - check = fwrite(near_data, 1, length, io_ptr); - } - - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t written, remaining, err; - check = 0; - remaining = length; - - do - { - written = MIN(NEAR_BUF_SIZE, remaining); - png_memcpy(buf, data, written); /* Copy far buffer to near buffer */ - err = fwrite(buf, 1, written, io_ptr); - if (err != written) - break; - else - check += err; - data += written; - remaining -= written; - } - while (remaining != 0); - } - - if (check != length) - { - png_error(png_ptr, "Write Error"); - } - -#ifdef PNG_IO_STATE_SUPPORTED - pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING); -#endif -} -#endif /* USE_FAR_KEYWORD */ /* This function is called when there is a warning, but the library thinks * it can continue anyway. Replacement functions don't have to do anything * here if you don't want to. In the default configuration, png_ptr is @@ -562,11 +429,11 @@ typedef struct memory_information { png_alloc_size_t size; png_voidp pointer; - struct memory_information FAR *next; + struct memory_information *next; } memory_information; -typedef memory_information FAR *memory_infop; +typedef memory_information *memory_infop; static memory_infop pinformation = NULL; static int current_allocation = 0; static int maximum_allocation = 0; @@ -620,9 +487,9 @@ pinfo->next = pinformation; pinformation = pinfo; /* Make sure the caller isn't assuming zeroed memory. */ - png_memset(pinfo->pointer, 0xdd, pinfo->size); + memset(pinfo->pointer, 0xdd, pinfo->size); if (verbose) printf("png_malloc %lu bytes at %p\n", (unsigned long)size, pinfo->pointer); @@ -647,9 +514,9 @@ } /* Unlink the element from the list. */ { - memory_infop FAR *ppinfo = &pinformation; + memory_infop *ppinfo = &pinformation; for (;;) { memory_infop pinfo = *ppinfo; @@ -661,9 +528,9 @@ if (current_allocation < 0) fprintf(STDERR, "Duplicate free of memory\n"); /* We must free the list element too, but first kill the memory that is to be freed. */ - png_memset(ptr, 0x55, pinfo->size); + memset(ptr, 0x55, pinfo->size); png_free_default(png_ptr, pinfo); pinfo = NULL; break; } @@ -758,9 +625,9 @@ #endif /* END of code to demonstrate user chunk support */ /* Test one file */ -int +static int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) { static png_FILE_p fpin; static png_FILE_p fpout; /* "static" prevents setjmp corruption */ @@ -779,13 +646,8 @@ png_uint_32 y; png_uint_32 width, height; int num_pass, pass; int bit_depth, color_type; -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf tmp_jmpbuf; -#endif -#endif char inbuf[256], outbuf[256]; row_buf = NULL; @@ -849,13 +711,9 @@ #endif #ifdef PNG_SETJMP_SUPPORTED pngtest_debug("Setting jmpbuf for read struct"); -#ifdef USE_FAR_KEYWORD - if (setjmp(tmp_jmpbuf)) -#else if (setjmp(png_jmpbuf(read_ptr))) -#endif { fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname); png_free(read_ptr, row_buf); row_buf = NULL; @@ -867,20 +725,13 @@ FCLOSE(fpin); FCLOSE(fpout); return (1); } -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(read_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); -#endif #ifdef PNG_WRITE_SUPPORTED pngtest_debug("Setting jmpbuf for write struct"); -#ifdef USE_FAR_KEYWORD - if (setjmp(tmp_jmpbuf)) -#else if (setjmp(png_jmpbuf(write_ptr))) -#endif { fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname); png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); png_destroy_info_struct(write_ptr, &write_end_info_ptr); @@ -890,15 +741,22 @@ FCLOSE(fpin); FCLOSE(fpout); return (1); } - -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(write_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); -#endif #endif #endif + if (strict) + { + /* Treat png_benign_error() as errors on read */ + png_set_benign_errors(read_ptr, 0); + + /* Treat them as errors on write */ + png_set_benign_errors(write_ptr, 0); + + /* if strict is not set, then both are treated as warnings. */ + } + pngtest_debug("Initializing input and output streams"); #ifdef PNG_STDIO_SUPPORTED png_init_io(read_ptr, fpin); # ifdef PNG_WRITE_SUPPORTED @@ -1164,9 +1022,18 @@ { pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text); if (verbose) - printf("\n Text compression=%d\n", text_ptr->compression); + { + int i; + + printf("\n"); + for (i=0; i 0) { pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text); + + if (verbose) + { + int i; + + printf("\n"); + for (i=0; iinterlaced) @@ -114,9 +114,9 @@ * for 48-bit input data, as well as to avoid problems with some compilers * that don't like bytes as parameters. */ void PNGAPI -png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc) +png_set_filler(png_structrp png_ptr, png_uint_32 filler, int filler_loc) { png_debug(1, "in png_set_filler"); if (png_ptr == NULL) @@ -151,9 +151,9 @@ } /* Added to libpng-1.2.7 */ void PNGAPI -png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc) +png_set_add_alpha(png_structrp png_ptr, png_uint_32 filler, int filler_loc) { png_debug(1, "in png_set_add_alpha"); if (png_ptr == NULL) @@ -167,9 +167,9 @@ #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) void PNGAPI -png_set_swap_alpha(png_structp png_ptr) +png_set_swap_alpha(png_structrp png_ptr) { png_debug(1, "in png_set_swap_alpha"); if (png_ptr == NULL) @@ -181,9 +181,9 @@ #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) void PNGAPI -png_set_invert_alpha(png_structp png_ptr) +png_set_invert_alpha(png_structrp png_ptr) { png_debug(1, "in png_set_invert_alpha"); if (png_ptr == NULL) @@ -194,9 +194,9 @@ #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) void PNGAPI -png_set_invert_mono(png_structp png_ptr) +png_set_invert_mono(png_structrp png_ptr) { png_debug(1, "in png_set_invert_mono"); if (png_ptr == NULL) @@ -622,9 +622,9 @@ #if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED) /* Added at libpng-1.5.10 */ void /* PRIVATE */ -png_do_check_palette_indexes(png_structp png_ptr, png_row_infop row_info) +png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info) { if (png_ptr->num_palette < (1 << row_info->bit_depth) && png_ptr->num_palette_max >= 0) { @@ -725,9 +725,9 @@ #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED void PNGAPI -png_set_user_transform_info(png_structp png_ptr, png_voidp +png_set_user_transform_info(png_structrp png_ptr, png_voidp user_transform_ptr, int user_transform_depth, int user_transform_channels) { png_debug(1, "in png_set_user_transform_info"); @@ -745,20 +745,20 @@ * are called. */ #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED png_voidp PNGAPI -png_get_user_transform_ptr(png_const_structp png_ptr) +png_get_user_transform_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) return (NULL); - return ((png_voidp)png_ptr->user_transform_ptr); + return png_ptr->user_transform_ptr; } #endif #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED png_uint_32 PNGAPI -png_get_current_row_number(png_const_structp png_ptr) +png_get_current_row_number(png_const_structrp png_ptr) { /* See the comments in png.h - this is the sub-image row when reading and * interlaced image. */ @@ -768,9 +768,9 @@ return PNG_UINT_32_MAX; /* help the app not to fail silently */ } png_byte PNGAPI -png_get_current_pass_number(png_const_structp png_ptr) +png_get_current_pass_number(png_const_structrp png_ptr) { if (png_ptr != NULL) return png_ptr->pass; return 8; /* invalid */ diff -ru4NwbB libpng-1.5.10/pngwio.c libpng-1.6.0beta22/pngwio.c --- libpng-1.5.10/pngwio.c 2012-03-29 00:06:54.660251743 -0500 +++ libpng-1.6.0beta22/pngwio.c 2012-05-23 12:30:56.219444522 -0500 @@ -1,9 +1,9 @@ /* pngwio.c - functions for data output * - * Last changed in libpng 1.5.0 [January 6, 2011] - * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * * This code is released under the libpng license. @@ -29,13 +29,14 @@ * to write more than 64K on a 16 bit machine. */ void /* PRIVATE */ -png_write_data(png_structp png_ptr, png_const_bytep data, png_size_t length) +png_write_data(png_structrp png_ptr, png_const_bytep data, png_size_t length) { /* NOTE: write_data_fn must not change the buffer! */ if (png_ptr->write_data_fn != NULL ) - (*(png_ptr->write_data_fn))(png_ptr, (png_bytep)data, length); + (*(png_ptr->write_data_fn))(png_ptr, png_constcast(png_bytep,data), + length); else png_error(png_ptr, "Call to NULL write function"); } @@ -45,9 +46,8 @@ * not writing to a standard C stream, you should create a replacement * write_data function and use it at run time with png_set_write_fn(), rather * than changing the library. */ -#ifndef USE_FAR_KEYWORD void PNGCBAPI png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; @@ -59,75 +59,17 @@ if (check != length) png_error(png_ptr, "Write Error"); } -#else -/* This is the model-independent version. Since the standard I/O library - * can't handle far buffers in the medium and small models, we have to copy - * the data. - */ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -void PNGCBAPI -png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */ - png_FILE_p io_ptr; - - if (png_ptr == NULL) - return; - - /* Check if data really is near. If so, use usual code. */ - near_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - - if ((png_bytep)near_data == data) - { - check = fwrite(near_data, 1, length, io_ptr); - } - - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t written, remaining, err; - check = 0; - remaining = length; - - do - { - written = MIN(NEAR_BUF_SIZE, remaining); - png_memcpy(buf, data, written); /* Copy far buffer to near buffer */ - err = fwrite(buf, 1, written, io_ptr); - - if (err != written) - break; - - else - check += err; - - data += written; - remaining -= written; - } - while (remaining != 0); - } - - if (check != length) - png_error(png_ptr, "Write Error"); -} - -#endif #endif /* This function is called to output any data pending writing (normally * to disk). After png_flush is called, there should be no data pending * writing in any buffers. */ #ifdef PNG_WRITE_FLUSH_SUPPORTED void /* PRIVATE */ -png_flush(png_structp png_ptr) +png_flush(png_structrp png_ptr) { if (png_ptr->output_flush_fn != NULL) (*(png_ptr->output_flush_fn))(png_ptr); } @@ -140,9 +82,9 @@ if (png_ptr == NULL) return; - io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr)); + io_ptr = png_voidcast(png_FILE_p, (png_ptr->io_ptr)); fflush(io_ptr); } # endif #endif @@ -176,9 +118,9 @@ * a good idea if io_ptr does not point to a standard * *FILE structure. */ void PNGAPI -png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, +png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn) { if (png_ptr == NULL) return; @@ -218,37 +160,5 @@ "Can't set both read_data_fn and write_data_fn in the" " same structure"); } } - -#ifdef USE_FAR_KEYWORD -# ifdef _MSC_VER -void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check) -{ - void *near_ptr; - void FAR *far_ptr; - FP_OFF(near_ptr) = FP_OFF(ptr); - far_ptr = (void FAR *)near_ptr; - - if (check != 0) - if (FP_SEG(ptr) != FP_SEG(far_ptr)) - png_error(png_ptr, "segment lost in conversion"); - - return(near_ptr); -} -# else -void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check) -{ - void *near_ptr; - void FAR *far_ptr; - near_ptr = (void FAR *)ptr; - far_ptr = (void FAR *)near_ptr; - - if (check != 0) - if (far_ptr != ptr) - png_error(png_ptr, "segment lost in conversion"); - - return(near_ptr); -} -# endif -#endif #endif /* PNG_WRITE_SUPPORTED */ diff -ru4NwbB libpng-1.5.10/pngwrite.c libpng-1.6.0beta22/pngwrite.c --- libpng-1.5.10/pngwrite.c 2012-03-29 00:06:54.669727590 -0500 +++ libpng-1.6.0beta22/pngwrite.c 2012-05-23 12:30:56.230511348 -0500 @@ -1,8 +1,8 @@ /* pngwrite.c - general routines to write a PNG file * - * Last changed in libpng 1.5.10 [March 8, 2012] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -11,8 +11,11 @@ * and license in png.h */ #include "pngpriv.h" +#if defined PNG_SIMPLIFIED_WRITE_SUPPORTED && defined PNG_STDIO_SUPPORTED +# include +#endif #ifdef PNG_WRITE_SUPPORTED /* Writes all the PNG information. This is the suggested way to use the @@ -24,9 +27,9 @@ * write a plain PNG file. If you have long comments, I suggest writing * them in png_write_end(), and compressing them. */ void PNGAPI -png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) +png_write_info_before_PLTE(png_structrp png_ptr, png_const_inforp info_ptr) { png_debug(1, "in png_write_info_before_PLTE"); if (png_ptr == NULL || info_ptr == NULL) @@ -56,34 +59,70 @@ 0); #endif /* The rest of these check to see if the valid field has the appropriate * flag set, and if it does, writes the chunk. + * + * 1.6.0: COLORSPACE support controls the writing of these chunks too, and + * the chunks will be written if the WRITE routine is there and information + * is available in the COLORSPACE. (See png_colorspace_sync_info in png.c + * for where the valid flags get set.) + * + * Under certain circumstances the colorspace can be invalidated without + * syncing the info_struct 'valid' flags; this happens if libpng detects and + * error and calls png_error while the color space is being set, yet the + * application continues writing the PNG. So check the 'invalid' flag here + * too. */ +#ifdef PNG_GAMMA_SUPPORTED #ifdef PNG_WRITE_gAMA_SUPPORTED - if (info_ptr->valid & PNG_INFO_gAMA) - png_write_gAMA_fixed(png_ptr, info_ptr->gamma); + if (!(info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) && + (info_ptr->colorspace.flags & PNG_COLORSPACE_FROM_gAMA) && + (info_ptr->valid & PNG_INFO_gAMA)) + png_write_gAMA_fixed(png_ptr, info_ptr->colorspace.gamma); +# endif #endif + +#ifdef PNG_COLORSPACE_SUPPORTED + /* Write only one of sRGB or an ICC profile. If a profile was supplied + * and it matches one of the known sRGB ones issue a warning. + */ +# ifdef PNG_WRITE_iCCP_SUPPORTED + if (!(info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) && + (info_ptr->valid & PNG_INFO_iCCP)) + { #ifdef PNG_WRITE_sRGB_SUPPORTED if (info_ptr->valid & PNG_INFO_sRGB) - png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent); + png_app_warning(png_ptr, + "profile matches sRGB but writing iCCP instead"); #endif -#ifdef PNG_WRITE_iCCP_SUPPORTED - if (info_ptr->valid & PNG_INFO_iCCP) - png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE, - (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen); + png_write_iCCP(png_ptr, info_ptr->iccp_name, + info_ptr->iccp_profile); + } +# ifdef PNG_WRITE_sRGB_SUPPORTED + else #endif +# endif + +# ifdef PNG_WRITE_sRGB_SUPPORTED + if (!(info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) && + (info_ptr->valid & PNG_INFO_sRGB)) + png_write_sRGB(png_ptr, info_ptr->colorspace.rendering_intent); +# endif /* WRITE_sRGB */ +#endif /* COLORSPACE */ + #ifdef PNG_WRITE_sBIT_SUPPORTED if (info_ptr->valid & PNG_INFO_sBIT) png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type); #endif + +#ifdef PNG_COLORSPACE_SUPPORTED #ifdef PNG_WRITE_cHRM_SUPPORTED - if (info_ptr->valid & PNG_INFO_cHRM) - png_write_cHRM_fixed(png_ptr, - info_ptr->x_white, info_ptr->y_white, - info_ptr->x_red, info_ptr->y_red, - info_ptr->x_green, info_ptr->y_green, - info_ptr->x_blue, info_ptr->y_blue); + if (!(info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) && + (info_ptr->colorspace.flags & PNG_COLORSPACE_FROM_cHRM) && + (info_ptr->valid & PNG_INFO_cHRM)) + png_write_cHRM_fixed(png_ptr, &info_ptr->colorspace.end_points_xy); +# endif #endif #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED if (info_ptr->unknown_chunks_num) @@ -118,9 +157,9 @@ } } void PNGAPI -png_write_info(png_structp png_ptr, png_infop info_ptr) +png_write_info(png_structrp png_ptr, png_const_inforp info_ptr) { #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) int i; #endif @@ -294,9 +333,9 @@ * in png_write_info(), do not write them again here. If you have long * comments, I suggest writing them here, and compressing them. */ void PNGAPI -png_write_end(png_structp png_ptr, png_infop info_ptr) +png_write_end(png_structrp png_ptr, png_inforp info_ptr) { png_debug(1, "in png_write_end"); if (png_ptr == NULL) @@ -421,9 +460,9 @@ #ifdef PNG_CONVERT_tIME_SUPPORTED /* "tm" structure is not supported on WindowsCE */ void PNGAPI -png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime) +png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm * ttime) { png_debug(1, "in png_convert_from_struct_tm"); ptime->year = (png_uint_16)(1900 + ttime->tm_year); @@ -450,106 +489,74 @@ PNG_FUNCTION(png_structp,PNGAPI png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) { -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); +#ifndef PNG_USER_MEM_SUPPORTED + png_structrp png_ptr = png_create_png_struct(user_png_ver, error_ptr, + error_fn, warn_fn, NULL, NULL, NULL); +#else + return png_create_write_struct_2(user_png_ver, error_ptr, error_fn, + warn_fn, NULL, NULL, NULL); } /* Alternate initialize png_ptr structure, and allocate any memory needed */ -static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */ - PNG_FUNCTION(png_structp,PNGAPI png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) { + png_structrp png_ptr = png_create_png_struct(user_png_ver, error_ptr, + error_fn, warn_fn, mem_ptr, malloc_fn, free_fn); #endif /* PNG_USER_MEM_SUPPORTED */ - volatile int png_cleanup_needed = 0; -#ifdef PNG_SETJMP_SUPPORTED - volatile -#endif - png_structp png_ptr; -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf tmp_jmpbuf; -#endif -#endif - - png_debug(1, "in png_create_write_struct"); -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr); -#else - png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); -#endif /* PNG_USER_MEM_SUPPORTED */ - if (png_ptr == NULL) - return (NULL); + /* Set the zlib control values to defaults; they can be overridden by the + * application after the struct has been created. + */ + png_ptr->zbuffer_size = PNG_ZBUF_SIZE; - /* Added at libpng-1.2.6 */ -#ifdef PNG_SET_USER_LIMITS_SUPPORTED - png_ptr->user_width_max = PNG_USER_WIDTH_MAX; - png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; + png_ptr->zlib_strategy = Z_FILTERED; /* may be overridden if no filters */ + png_ptr->zlib_level = Z_DEFAULT_COMPRESSION; + png_ptr->zlib_mem_level = 8; + png_ptr->zlib_window_bits = 15; + png_ptr->zlib_method = 8; + +#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED + png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; + png_ptr->zlib_text_level = Z_DEFAULT_COMPRESSION; + png_ptr->zlib_text_mem_level = 8; + png_ptr->zlib_text_window_bits = 15; + png_ptr->zlib_text_method = 8; +#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ + + /* This is a highly dubious configuration option; by default it is off, but + * it may be appropriate for private builds that are testing extensions not + * conformant to the current specification, or of applications that must not + * fail to write at all costs! + */ +# ifdef PNG_BENIGN_WRITE_ERRORS_SUPPORTED + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; + /* In stable builds only warn if an application error can be completely + * handled. + */ #endif -#ifdef PNG_SETJMP_SUPPORTED -/* Applications that neglect to set up their own setjmp() and then - * encounter a png_error() will longjmp here. Since the jmpbuf is - * then meaningless we abort instead of returning. + /* App warnings are warnings in release (or release candidate) builds but + * are errors during development. */ -#ifdef USE_FAR_KEYWORD - if (setjmp(tmp_jmpbuf)) -#else - if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */ -#endif -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); +# if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC + png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN; #endif - PNG_ABORT(); -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); -#endif /* PNG_USER_MEM_SUPPORTED */ - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - if (!png_user_version_check(png_ptr, user_png_ver)) - png_cleanup_needed = 1; - - /* Initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - if (!png_cleanup_needed) - { - png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, - png_ptr->zbuf_size); - if (png_ptr->zbuf == NULL) - png_cleanup_needed = 1; - } - - if (png_cleanup_needed) + if (png_ptr != NULL) { - /* Clean up PNG structure and deallocate any memory. */ - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, - (png_free_ptr)free_fn, (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - return (NULL); - } - + /* TODO: delay this, it can be done in png_init_io() (if the app doesn't + * do it itself) avoiding setting the default function if it is not + * required. + */ png_set_write_fn(png_ptr, NULL, NULL, NULL); + } -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - png_reset_filter_heuristics(png_ptr); -#endif - - return (png_ptr); + return png_ptr; } /* Write a few rows of image data. If the image is interlaced, @@ -557,9 +564,9 @@ * have called png_set_interlace_handling(), you will have to * "write" the image seven times. */ void PNGAPI -png_write_rows(png_structp png_ptr, png_bytepp row, +png_write_rows(png_structrp png_ptr, png_bytepp row, png_uint_32 num_rows) { png_uint_32 i; /* row counter */ png_bytepp rp; /* row pointer */ @@ -579,9 +586,9 @@ /* Write the image. You only need to call this function once, even * if you are writing an interlaced image. */ void PNGAPI -png_write_image(png_structp png_ptr, png_bytepp image) +png_write_image(png_structrp png_ptr, png_bytepp image) { png_uint_32 i; /* row index */ int pass, num_pass; /* pass variables */ png_bytepp rp; /* points to current row */ @@ -611,9 +618,9 @@ } /* Called by user to write a row of image data */ void PNGAPI -png_write_row(png_structp png_ptr, png_const_bytep row) +png_write_row(png_structrp png_ptr, png_const_bytep row) { /* 1.5.6: moved from png_struct to be a local structure: */ png_row_info row_info; @@ -819,9 +826,9 @@ #ifdef PNG_WRITE_FLUSH_SUPPORTED /* Set the automatic flush interval or 0 to turn flushing off */ void PNGAPI -png_set_flush(png_structp png_ptr, int nrows) +png_set_flush(png_structrp png_ptr, int nrows) { png_debug(1, "in png_set_flush"); if (png_ptr == NULL) @@ -831,12 +838,10 @@ } /* Flush the current output buffers now */ void PNGAPI -png_write_flush(png_structp png_ptr) +png_write_flush(png_structrp png_ptr) { - int wrote_IDAT; - png_debug(1, "in png_write_flush"); if (png_ptr == NULL) return; @@ -844,135 +849,30 @@ /* We have already written out all of the data */ if (png_ptr->row_number >= png_ptr->num_rows) return; - do - { - int ret; - - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_SYNC_FLUSH); - wrote_IDAT = 0; - - /* Check for compression errors */ - if (ret != Z_OK) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - - if (!(png_ptr->zstream.avail_out)) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - wrote_IDAT = 1; - } - } while (wrote_IDAT == 1); - - /* If there is any data left to be output, write it into a new IDAT */ - if (png_ptr->zbuf_size != png_ptr->zstream.avail_out) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - } + png_compress_IDAT(png_ptr, NULL, 0, Z_SYNC_FLUSH); png_ptr->flush_rows = 0; png_flush(png_ptr); } #endif /* PNG_WRITE_FLUSH_SUPPORTED */ -/* Free all memory used by the write */ -void PNGAPI -png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) -{ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; - png_voidp mem_ptr = NULL; -#endif - - png_debug(1, "in png_destroy_write_struct"); - - if (png_ptr_ptr != NULL) - png_ptr = *png_ptr_ptr; - -#ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr != NULL) - { - free_fn = png_ptr->free_fn; - mem_ptr = png_ptr->mem_ptr; - } -#endif - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (info_ptr != NULL) - { - if (png_ptr != NULL) - { - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->num_chunk_list = 0; - } -#endif - } - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED +static void png_reset_filter_heuristics(png_structrp png_ptr); /* forward decl */ #endif - *info_ptr_ptr = NULL; - } - if (png_ptr != NULL) +/* Free any memory used in png_ptr struct without freeing the struct itself. */ +static void +png_write_destroy(png_structrp png_ptr) { - png_write_destroy(png_ptr); -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = NULL; - } -} - - -/* Free any memory used in png_ptr struct (old method) */ -void /* PRIVATE */ -png_write_destroy(png_structp png_ptr) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; /* Save jump buffer */ -#endif - png_error_ptr error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_error_ptr warning_fn; -#endif - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - png_debug(1, "in png_write_destroy"); /* Free any memory zlib uses */ - if (png_ptr->zlib_state != PNG_ZLIB_UNINITIALIZED) + if (png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) deflateEnd(&png_ptr->zstream); /* Free our memory. png_free checks NULL for us. */ - png_free(png_ptr, png_ptr->zbuf); + png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); png_free(png_ptr, png_ptr->row_buf); #ifdef PNG_WRITE_FILTER_SUPPORTED png_free(png_ptr, png_ptr->prev_row); png_free(png_ptr, png_ptr->sub_row); @@ -987,41 +887,48 @@ png_free(png_ptr, png_ptr->filter_costs); png_free(png_ptr, png_ptr->inv_filter_costs); #endif -#ifdef PNG_SETJMP_SUPPORTED - /* Reset structure */ - png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + png_free(png_ptr, png_ptr->chunk_list); #endif - error_fn = png_ptr->error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - warning_fn = png_ptr->warning_fn; -#endif - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif + /* The error handling and memory handling information is left intact at this + * point: the jmp_buf may still have to be freed. See png_destroy_png_struct + * for how this happens. + */ +} - png_memset(png_ptr, 0, png_sizeof(png_struct)); +/* Free all memory used by the write. + * In libpng 1.6.0 this API changed quietly to no longer accept a NULL value for + * *png_ptr_ptr. Prior to 1.6.0 it would accept such a value and it would free + * the passed in info_structs but it would quietly fail to free any of the data + * inside them. In 1.6.0 it quietly does nothing (it has to be quiet because it + * has no png_ptr.) + */ +void PNGAPI +png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) +{ + png_debug(1, "in png_destroy_write_struct"); - png_ptr->error_fn = error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_ptr->warning_fn = warning_fn; -#endif - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif + if (png_ptr_ptr != NULL) + { + png_structrp png_ptr = *png_ptr_ptr; -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); -#endif + if (png_ptr != NULL) /* added in libpng 1.6.0 */ + { + png_destroy_info_struct(png_ptr, info_ptr_ptr); + + *png_ptr_ptr = NULL; + png_write_destroy(png_ptr); + png_destroy_png_struct(png_ptr); + } + } } /* Allow the application to select one or more row filters to use. */ void PNGAPI -png_set_filter(png_structp png_ptr, int method, int filters) +png_set_filter(png_structrp png_ptr, int method, int filters) { png_debug(1, "in png_set_filter"); if (png_ptr == NULL) @@ -1154,9 +1061,9 @@ */ #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */ /* Convenience reset API. */ static void -png_reset_filter_heuristics(png_structp png_ptr) +png_reset_filter_heuristics(png_structrp png_ptr) { /* Clear out any old values in the 'weights' - this must be done because if * the app calls set_filter_heuristics multiple times with different * 'num_weights' values we would otherwise potentially have wrong sized @@ -1187,9 +1094,9 @@ /* Leave the filter_costs - this array is fixed size. */ } static int -png_init_filter_heuristics(png_structp png_ptr, int heuristic_method, +png_init_filter_heuristics(png_structrp png_ptr, int heuristic_method, int num_weights) { if (png_ptr == NULL) return 0; @@ -1270,9 +1177,9 @@ /* Provide floating and fixed point APIs */ #ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, +png_set_filter_heuristics(png_structrp png_ptr, int heuristic_method, int num_weights, png_const_doublep filter_weights, png_const_doublep filter_costs) { png_debug(1, "in png_set_filter_heuristics"); @@ -1325,9 +1232,9 @@ #endif /* FLOATING_POINT */ #ifdef PNG_FIXED_POINT_SUPPORTED void PNGAPI -png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method, +png_set_filter_heuristics_fixed(png_structrp png_ptr, int heuristic_method, int num_weights, png_const_fixed_point_p filter_weights, png_const_fixed_point_p filter_costs) { png_debug(1, "in png_set_filter_heuristics_fixed"); @@ -1391,154 +1298,151 @@ #endif /* FIXED_POINT */ #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ void PNGAPI -png_set_compression_level(png_structp png_ptr, int level) +png_set_compression_level(png_structrp png_ptr, int level) { png_debug(1, "in png_set_compression_level"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL; png_ptr->zlib_level = level; } void PNGAPI -png_set_compression_mem_level(png_structp png_ptr, int mem_level) +png_set_compression_mem_level(png_structrp png_ptr, int mem_level) { png_debug(1, "in png_set_compression_mem_level"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL; png_ptr->zlib_mem_level = mem_level; } void PNGAPI -png_set_compression_strategy(png_structp png_ptr, int strategy) +png_set_compression_strategy(png_structrp png_ptr, int strategy) { png_debug(1, "in png_set_compression_strategy"); if (png_ptr == NULL) return; + /* The flag setting here prevents the libpng dynamic selection of strategy. + */ png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY; png_ptr->zlib_strategy = strategy; } /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a * smaller value of window_bits if it can do so safely. */ void PNGAPI -png_set_compression_window_bits(png_structp png_ptr, int window_bits) +png_set_compression_window_bits(png_structrp png_ptr, int window_bits) { if (png_ptr == NULL) return; + /* Prior to 1.6.0 this would warn but then set the window_bits value, this + * meant that negative window bits values could be selected which would cause + * libpng to write a non-standard PNG file with raw deflate or gzip + * compressed IDAT or ancilliary chunks. Such files can be read and there is + * no warning on read, so this seems like a very bad idea. + */ if (window_bits > 15) + { png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); + window_bits = 15; + } else if (window_bits < 8) - png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); - -#ifndef WBITS_8_OK - /* Avoid libpng bug with 256-byte windows */ - if (window_bits == 8) { - png_warning(png_ptr, "Compression window is being reset to 512"); - window_bits = 9; + png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); + window_bits = 8; } -#endif - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS; png_ptr->zlib_window_bits = window_bits; } void PNGAPI -png_set_compression_method(png_structp png_ptr, int method) +png_set_compression_method(png_structrp png_ptr, int method) { png_debug(1, "in png_set_compression_method"); if (png_ptr == NULL) return; + /* This would produce an invalid PNG file if it worked, but it doesn't and + * deflate will fault it, so it is harmless to just warn here. + */ if (method != 8) png_warning(png_ptr, "Only compression method 8 is supported by PNG"); - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD; png_ptr->zlib_method = method; } /* The following were added to libpng-1.5.4 */ #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED void PNGAPI -png_set_text_compression_level(png_structp png_ptr, int level) +png_set_text_compression_level(png_structrp png_ptr, int level) { png_debug(1, "in png_set_text_compression_level"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_LEVEL; png_ptr->zlib_text_level = level; } void PNGAPI -png_set_text_compression_mem_level(png_structp png_ptr, int mem_level) +png_set_text_compression_mem_level(png_structrp png_ptr, int mem_level) { png_debug(1, "in png_set_text_compression_mem_level"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL; png_ptr->zlib_text_mem_level = mem_level; } void PNGAPI -png_set_text_compression_strategy(png_structp png_ptr, int strategy) +png_set_text_compression_strategy(png_structrp png_ptr, int strategy) { png_debug(1, "in png_set_text_compression_strategy"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_STRATEGY; png_ptr->zlib_text_strategy = strategy; } /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a * smaller value of window_bits if it can do so safely. */ void PNGAPI -png_set_text_compression_window_bits(png_structp png_ptr, int window_bits) +png_set_text_compression_window_bits(png_structrp png_ptr, int window_bits) { if (png_ptr == NULL) return; if (window_bits > 15) + { png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); + window_bits = 15; + } else if (window_bits < 8) - png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); - -#ifndef WBITS_8_OK - /* Avoid libpng bug with 256-byte windows */ - if (window_bits == 8) { - png_warning(png_ptr, "Text compression window is being reset to 512"); - window_bits = 9; + png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); + window_bits = 8; } -#endif - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS; png_ptr->zlib_text_window_bits = window_bits; } void PNGAPI -png_set_text_compression_method(png_structp png_ptr, int method) +png_set_text_compression_method(png_structrp png_ptr, int method) { png_debug(1, "in png_set_text_compression_method"); if (png_ptr == NULL) @@ -1546,16 +1450,15 @@ if (method != 8) png_warning(png_ptr, "Only compression method 8 is supported by PNG"); - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_METHOD; png_ptr->zlib_text_method = method; } #endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ /* end of API added to libpng-1.5.4 */ void PNGAPI -png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn) +png_set_write_status_fn(png_structrp png_ptr, png_write_status_ptr write_row_fn) { if (png_ptr == NULL) return; @@ -1563,9 +1466,9 @@ } #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED void PNGAPI -png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr +png_set_write_user_transform_fn(png_structrp png_ptr, png_user_transform_ptr write_user_transform_fn) { png_debug(1, "in png_set_write_user_transform_fn"); @@ -1579,9 +1482,9 @@ #ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI -png_write_png(png_structp png_ptr, png_infop info_ptr, +png_write_png(png_structrp png_ptr, png_inforp info_ptr, int transforms, voidp params) { if (png_ptr == NULL || info_ptr == NULL) return; @@ -1663,5 +1566,765 @@ PNG_UNUSED(transforms) /* Quiet compiler warnings */ PNG_UNUSED(params) } #endif + + +#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED +#ifdef PNG_STDIO_SUPPORTED /* currently required for png_image_write_* */ +/* Initialize the write structure - general purpose utility. */ +static int +png_image_write_init(png_imagep image) +{ + png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, image, + png_safe_error, png_safe_warning); + + if (png_ptr != NULL) + { + png_infop info_ptr = png_create_info_struct(png_ptr); + + if (info_ptr != NULL) + { + png_controlp control = png_voidcast(png_controlp, + png_malloc_warn(png_ptr, sizeof *control)); + + if (control != NULL) + { + png_memset(control, 0, sizeof *control); + + control->png_ptr = png_ptr; + control->info_ptr = info_ptr; + control->for_write = 1; + + image->opaque = control; + return 1; + } + + /* Error clean up */ + png_destroy_info_struct(png_ptr, &info_ptr); + } + + png_destroy_write_struct(&png_ptr, NULL); + } + + return png_image_error(image, "png_image_read: out of memory"); +} + +/* Arguments to png_image_write_main: */ +typedef struct +{ + /* Arguments: */ + png_imagep image; + png_const_voidp buffer; + png_int_32 row_stride; + png_const_voidp colormap; + int convert_to_8bit; + /* Local variables: */ + png_const_voidp first_row; + ptrdiff_t row_bytes; + png_voidp local_row; +} png_image_write_control; + +/* Write png_uint_16 input to a 16-bit PNG; the png_ptr has already been set to + * do any necessary byte swapping. The component order is defined by the + * png_image format value. + */ +static int +png_write_image_16bit(png_voidp argument) +{ + png_image_write_control *display = png_voidcast(png_image_write_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + + png_const_uint_16p input_row = png_voidcast(png_const_uint_16p, + display->first_row); + png_uint_16p output_row = png_voidcast(png_uint_16p, display->local_row); + png_uint_16p row_end; + const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) ? 3 : 1; + int aindex = 0; + png_uint_32 y = image->height; + + if (image->format & PNG_FORMAT_FLAG_ALPHA) + { + if (image->format & PNG_FORMAT_FLAG_AFIRST) + { + aindex = -1; + ++input_row; /* To point to the first component */ + ++output_row; + } + + else + aindex = channels; + } + + else + png_error(png_ptr, "png_write_image: internal call error"); + + /* Work out the output row end and count over this, note that the increment + * above to 'row' means that row_end can actually be beyond the end of the + * row; this is correct. + */ + row_end = output_row + image->width * (channels+1); + + while (y-- > 0) + { + png_const_uint_16p in_ptr = input_row; + png_uint_16p out_ptr = output_row; + + while (out_ptr < row_end) + { + const png_uint_16 alpha = in_ptr[aindex]; + png_uint_32 reciprocal = 0; + int c; + + out_ptr[aindex] = alpha; + + /* Calculate a reciprocal. The correct calculation is simply + * component/alpha*65535 << 15. (I.e. 15 bits of precision); this + * allows correct rounding by adding .5 before the shift. 'reciprocal' + * is only initialized when required. + */ + if (alpha > 0 && alpha < 65535) + reciprocal = ((0xffff<<15)+(alpha>>1))/alpha; + + c = channels; + do /* always at least one channel */ + { + png_uint_16 component = *in_ptr++; + + /* The following gives 65535 for an alpha of 0, which is fine, + * otherwise if 0/0 is represented as some other value there is more + * likely to be a discontinuity which will probably damage + * compression when moving from a fully transparent area to a + * nearly transparent one. (The assumption here is that opaque + * areas tend not to be 0 intensity.) + */ + if (component >= alpha) + component = 65535; + + /* component 0 && alpha < 65535) + { + png_uint_32 calc = component * reciprocal; + calc += 16384; /* round to nearest */ + component = (png_uint_16)(calc >> 15); + } + + *out_ptr++ = component; + } + while (--c > 0); + + /* Skip to next component (skip the intervening alpha channel) */ + ++in_ptr; + ++out_ptr; + } + + png_write_row(png_ptr, png_voidcast(png_const_bytep, display->local_row)); + input_row += display->row_bytes/(sizeof (png_uint_16)); + } + + return 1; +} + +/* Given 16-bit input (1 to 4 channels) write 8-bit output. If an alpha channel + * is present it must be removed from the components, the components are then + * written in sRGB encoding. No components are added or removed. + * + * Calculate an alpha reciprocal to reverse pre-multiplication. As above the + * calculation can be done to 15 bits of accuracy; however, the output needs to + * be scaled in the range 0..255*65535, so include that scaling here. + */ +#define UNP_RECIPROCAL(alpha) ((((0xffff*0xff)<<7)+(alpha>>1))/alpha) + +static png_byte +png_unpremultiply(png_uint_32 component, png_uint_32 alpha, + png_uint_32 reciprocal/*from the above macro*/) +{ + /* The following gives 1.0 for an alpha of 0, which is fine, otherwise if 0/0 + * is represented as some other value there is more likely to be a + * discontinuity which will probably damage compression when moving from a + * fully transparent area to a nearly transparent one. (The assumption here + * is that opaque areas tend not to be 0 intensity.) + * + * There is a rounding problem here; if alpha is less than 128 it will end up + * as 0 when scaled to 8 bits. To avoid introducing spurious colors into the + * output change for this too. + */ + if (component >= alpha || alpha < 128) + return 255; + + /* component 0) + { + /* The test is that alpha/257 (rounded) is less than 255, the first value + * that becomes 255 is 65407. + * NOTE: this must agree with the PNG_DIV257 macro (which must, therefore, + * be exact!) [Could also test reciprocal != 0] + */ + if (alpha < 65407) + { + component *= reciprocal; + component += 64; /* round to nearest */ + component >>= 7; + } + + else + component *= 255; + + /* Convert the component to sRGB. */ + return (png_byte)PNG_sRGB_FROM_LINEAR(component); + } + + else + return 0; +} + +static int +png_write_image_8bit(png_voidp argument) +{ + png_image_write_control *display = png_voidcast(png_image_write_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + + png_const_uint_16p input_row = png_voidcast(png_const_uint_16p, + display->first_row); + png_bytep output_row = png_voidcast(png_bytep, display->local_row); + png_uint_32 y = image->height; + const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) ? 3 : 1; + + if (image->format & PNG_FORMAT_FLAG_ALPHA) + { + png_bytep row_end; + int aindex; + + if (image->format & PNG_FORMAT_FLAG_AFIRST) + { + aindex = -1; + ++input_row; /* To point to the first component */ + ++output_row; + } + + else + aindex = channels; + + /* Use row_end in place of a loop counter: */ + row_end = output_row + image->width * (channels+1); + + while (y-- > 0) + { + png_const_uint_16p in_ptr = input_row; + png_bytep out_ptr = output_row; + + while (out_ptr < row_end) + { + png_uint_16 alpha = in_ptr[aindex]; + png_byte alphabyte = (png_byte)PNG_DIV257(alpha); + png_uint_32 reciprocal = 0; + int c; + + /* Scale and write the alpha channel. */ + out_ptr[aindex] = alphabyte; + + if (alphabyte > 0 && alphabyte < 255) + reciprocal = UNP_RECIPROCAL(alpha); + + c = channels; + do /* always at least one channel */ + *out_ptr++ = png_unpremultiply(*in_ptr++, alpha, reciprocal); + while (--c > 0); + + /* Skip to next component (skip the intervening alpha channel) */ + ++in_ptr; + ++out_ptr; + } /* while out_ptr < row_end */ + + png_write_row(png_ptr, png_voidcast(png_const_bytep, + display->local_row)); + input_row += display->row_bytes/(sizeof (png_uint_16)); + } /* while y */ + } + + else + { + /* No alpha channel, so the row_end really is the end of the row and it + * is sufficient to loop over the components one by one. + */ + png_bytep row_end = output_row + image->width * channels; + + while (y-- > 0) + { + png_const_uint_16p in_ptr = input_row; + png_bytep out_ptr = output_row; + + while (out_ptr < row_end) + { + png_uint_32 component = *in_ptr++; + + component *= 255; + *out_ptr++ = (png_byte)PNG_sRGB_FROM_LINEAR(component); + } + + png_write_row(png_ptr, output_row); + input_row += display->row_bytes/(sizeof (png_uint_16)); + } + } + + return 1; +} + +static void +png_image_set_PLTE(png_image_write_control *display) +{ + const png_imagep image = display->image; + const void *cmap = display->colormap; + const int entries = image->colormap_entries > 256 ? 256 : + (int)image->colormap_entries; + + /* NOTE: the caller must check for cmap != NULL and entries != 0 */ + const png_uint_32 format = image->format; + const int channels = PNG_IMAGE_SAMPLE_CHANNELS(format); + +# ifdef PNG_FORMAT_BGR_SUPPORTED + const int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 && + (format & PNG_FORMAT_FLAG_ALPHA) != 0; +# else +# define afirst 0 +# endif + +# ifdef PNG_FORMAT_BGR_SUPPORTED + const int bgr = (format & PNG_FORMAT_FLAG_BGR) ? 2 : 0; +# else +# define bgr 0 +# endif + + int i, num_trans; + png_color palette[256]; + png_byte tRNS[256]; + + memset(tRNS, 255, sizeof tRNS); + memset(palette, 0, sizeof palette); + + for (i=num_trans=0; i= 3) /* RGB */ + { + palette[i].blue = (png_byte)PNG_sRGB_FROM_LINEAR(255 * + entry[(2 ^ bgr)]); + palette[i].green = (png_byte)PNG_sRGB_FROM_LINEAR(255 * + entry[1]); + palette[i].red = (png_byte)PNG_sRGB_FROM_LINEAR(255 * + entry[bgr]); + } + + else /* Gray */ + palette[i].blue = palette[i].red = palette[i].green = + (png_byte)PNG_sRGB_FROM_LINEAR(255 * *entry); + } + + else /* alpha */ + { + png_uint_16 alpha = entry[afirst ? 0 : channels-1]; + png_byte alphabyte = (png_byte)PNG_DIV257(alpha); + png_uint_32 reciprocal = 0; + + /* Calculate a reciprocal, as in the png_write_image_8bit code above + * this is designed to produce a value scaled to 255*65535 when + * divided by 128 (i.e. asr 7). + */ + if (alphabyte > 0 && alphabyte < 255) + reciprocal = (((0xffff*0xff)<<7)+(alpha>>1))/alpha; + + tRNS[i] = alphabyte; + if (alphabyte < 255) + num_trans = i+1; + + if (channels >= 3) /* RGB */ + { + palette[i].blue = png_unpremultiply(entry[afirst + (2 ^ bgr)], + alpha, reciprocal); + palette[i].green = png_unpremultiply(entry[afirst + 1], alpha, + reciprocal); + palette[i].red = png_unpremultiply(entry[afirst + bgr], alpha, + reciprocal); + } + + else /* gray */ + palette[i].blue = palette[i].red = palette[i].green = + png_unpremultiply(entry[afirst], alpha, reciprocal); + } + } + + else /* Color-map has sRGB values */ + { + png_const_bytep entry = png_voidcast(png_const_bytep, cmap); + + entry += i * channels; + + switch (channels) + { + case 4: + tRNS[i] = entry[afirst ? 0 : 3]; + if (tRNS[i] < 255) + num_trans = i+1; + /* FALL THROUGH */ + case 3: + palette[i].blue = entry[afirst + (2 ^ bgr)]; + palette[i].green = entry[afirst + 1]; + palette[i].red = entry[afirst + bgr]; + break; + + case 2: + tRNS[i] = entry[1 ^ afirst]; + if (tRNS[i] < 255) + num_trans = i+1; + /* FALL THROUGH */ + case 1: + palette[i].blue = palette[i].red = palette[i].green = + entry[afirst]; + break; + + default: + break; + } + } + } + +# ifdef afirst +# undef afirst +# endif +# ifdef bgr +# undef bgr +# endif + + png_set_PLTE(image->opaque->png_ptr, image->opaque->info_ptr, palette, + entries); + + if (num_trans > 0) + png_set_tRNS(image->opaque->png_ptr, image->opaque->info_ptr, tRNS, + num_trans, NULL); + + image->colormap_entries = entries; +} + +static int +png_image_write_main(png_voidp argument) +{ + png_image_write_control *display = png_voidcast(png_image_write_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + png_inforp info_ptr = image->opaque->info_ptr; + png_uint_32 format = image->format; + + int colormap = (format & PNG_FORMAT_FLAG_COLORMAP) != 0; + int linear = !colormap && (format & PNG_FORMAT_FLAG_LINEAR) != 0; /* input */ + int alpha = !colormap && (format & PNG_FORMAT_FLAG_ALPHA) != 0; + int write_16bit = linear && !colormap && !display->convert_to_8bit; + +# ifdef PNG_BENIGN_ERRORS_SUPPORTED + /* Make sure we error out on any bad situation */ + png_set_benign_errors(png_ptr, 0/*error*/); +# endif + + /* Default the 'row_stride' parameter if required. */ + if (display->row_stride == 0) + display->row_stride = PNG_IMAGE_ROW_STRIDE(*image); + + /* Set the required transforms then write the rows in the correct order. */ + if (format & PNG_FORMAT_FLAG_COLORMAP) + { + if (display->colormap != NULL && image->colormap_entries > 0) + { + png_uint_32 entries = image->colormap_entries; + + png_set_IHDR(png_ptr, info_ptr, image->width, image->height, + entries > 16 ? 8 : (entries > 4 ? 4 : (entries > 2 ? 2 : 1)), + PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + png_image_set_PLTE(display); + } + + else + png_error(image->opaque->png_ptr, + "no color-map for color-mapped image"); + } + + else + png_set_IHDR(png_ptr, info_ptr, image->width, image->height, + write_16bit ? 16 : 8, + ((format & PNG_FORMAT_FLAG_COLOR) ? PNG_COLOR_MASK_COLOR : 0) + + ((format & PNG_FORMAT_FLAG_ALPHA) ? PNG_COLOR_MASK_ALPHA : 0), + PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + /* Counter-intuitively the data transformations must be called *after* + * png_write_info, not before as in the read code, but the 'set' functions + * must still be called before. Just set the color space information, never + * write an interlaced image. + */ + + if (write_16bit) + { + /* The gamma here is 1.0 (linear) and the cHRM chunk matches sRGB. */ + png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_LINEAR); + + if (!(image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB)) + png_set_cHRM_fixed(png_ptr, info_ptr, + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 + ); + } + + else if (!(image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB)) + png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_PERCEPTUAL); + + /* Else writing an 8-bit file and the *colors* aren't sRGB, but the 8-bit + * space must still be gamma encoded. + */ + else + png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); + + /* Write the file header. */ + png_write_info(png_ptr, info_ptr); + + /* Now set up the data transformations (*after* the header is written), + * remove the handled transformations from the 'format' flags for checking. + * + * First check for a little endian system if writing 16 bit files. + */ + if (write_16bit) + { + PNG_CONST png_uint_16 le = 0x0001; + + if (*(png_const_bytep)&le) + png_set_swap(png_ptr); + } + +# ifdef PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED + if (format & PNG_FORMAT_FLAG_BGR) + { + if (!colormap && (format & PNG_FORMAT_FLAG_COLOR) != 0) + png_set_bgr(png_ptr); + format &= ~PNG_FORMAT_FLAG_BGR; + } +# endif + +# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + { + if (!colormap && (format & PNG_FORMAT_FLAG_ALPHA) != 0) + png_set_swap_alpha(png_ptr); + format &= ~PNG_FORMAT_FLAG_AFIRST; + } +# endif + + /* If there are 16 or fewer color-map entries we wrote a lower bit depth + * above, but the application data is still byte packed. + */ + if (colormap && image->colormap_entries <= 16) + png_set_packing(png_ptr); + + /* That should have handled all (both) the transforms. */ + if ((format & ~(png_uint_32)(PNG_FORMAT_FLAG_COLOR | PNG_FORMAT_FLAG_LINEAR | + PNG_FORMAT_FLAG_ALPHA | PNG_FORMAT_FLAG_COLORMAP)) != 0) + png_error(png_ptr, "png_write_image: unsupported transformation"); + + { + png_const_bytep row = png_voidcast(png_const_bytep, display->buffer); + ptrdiff_t row_bytes = display->row_stride; + + if (linear) + row_bytes *= sizeof (png_uint_16); + + if (row_bytes < 0) + row += (image->height-1) * (-row_bytes); + + display->first_row = row; + display->row_bytes = row_bytes; + } + + /* Apply 'fast' options if the flag is set. */ + if ((image->flags & PNG_IMAGE_FLAG_FAST) != 0) + { + png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_NO_FILTERS); + /* NOTE: determined by experiment using pngstest, this reflects some + * balance between the time to write the image once and the time to read + * it about 50 times. The speed-up in pngstest was about 10-20% of the + * total (user) time on a heavily loaded system. + */ + png_set_compression_level(png_ptr, 3); + } + + /* Check for the cases that currently require a pre-transform on the row + * before it is written. This only applies when the input is 16-bit and + * either there is an alpha channel or it is converted to 8-bit. + */ + if ((linear && alpha) || (!colormap && display->convert_to_8bit)) + { + png_bytep row = png_voidcast(png_bytep, png_malloc(png_ptr, + png_get_rowbytes(png_ptr, info_ptr))); + int result; + + display->local_row = row; + if (write_16bit) + result = png_safe_execute(image, png_write_image_16bit, display); + else + result = png_safe_execute(image, png_write_image_8bit, display); + display->local_row = NULL; + + png_free(png_ptr, row); + + /* Skip the 'write_end' on error: */ + if (!result) + return 0; + } + + /* Otherwise this is the case where the input is in a format currently + * supported by the rest of the libpng write code; call it directly. + */ + else + { + png_const_bytep row = png_voidcast(png_const_bytep, display->first_row); + ptrdiff_t row_bytes = display->row_bytes; + png_uint_32 y = image->height; + + while (y-- > 0) + { + png_write_row(png_ptr, row); + row += row_bytes; + } + } + + png_write_end(png_ptr, info_ptr); + return 1; +} + +int PNGAPI +png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit, + const void *buffer, png_int_32 row_stride, const void *colormap) +{ + /* Write the image to the given (FILE*). */ + if (image != NULL || image->version != PNG_IMAGE_VERSION) + { + if (file != NULL) + { + if (png_image_write_init(image)) + { + png_image_write_control display; + int result; + + /* This is slightly evil, but png_init_io doesn't do anything other + * than this and we haven't changed the standard IO functions so + * this saves a 'safe' function. + */ + image->opaque->png_ptr->io_ptr = file; + + png_memset(&display, 0, sizeof display); + display.image = image; + display.buffer = buffer; + display.row_stride = row_stride; + display.colormap = colormap; + display.convert_to_8bit = convert_to_8bit; + + result = png_safe_execute(image, png_image_write_main, &display); + png_image_free(image); + return result; + } + + else + return 0; + } + + else + return png_image_error(image, + "png_image_write_to_stdio: invalid argument"); + } + + else + return 0; +} + +int PNGAPI +png_image_write_to_file(png_imagep image, const char *file_name, + int convert_to_8bit, const void *buffer, png_int_32 row_stride, + const void *colormap) +{ + /* Write the image to the named file. */ + if (image != NULL || image->version != PNG_IMAGE_VERSION) + { + if (file_name != NULL) + { + FILE *fp = fopen(file_name, "wb"); + + if (fp != NULL) + { + if (png_image_write_to_stdio(image, fp, convert_to_8bit, buffer, + row_stride, colormap)) + { + int error; /* from fflush/fclose */ + + /* Make sure the file is flushed correctly. */ + if (fflush(fp) == 0 && ferror(fp) == 0) + { + if (fclose(fp) == 0) + return 1; + + error = errno; /* from fclose */ + } + + else + { + error = errno; /* from fflush or ferror */ + (void)fclose(fp); + } + + (void)remove(file_name); + /* The image has already been cleaned up; this is just used to + * set the error (because the original write succeeded). + */ + return png_image_error(image, strerror(error)); + } + + else + { + /* Clean up: just the opened file. */ + (void)fclose(fp); + (void)remove(file_name); + return 0; + } + } + + else + return png_image_error(image, strerror(errno)); + } + + else + return png_image_error(image, + "png_image_write_to_file: invalid argument"); + } + + else + return 0; +} +#endif /* PNG_STDIO_SUPPORTED */ +#endif /* SIMPLIFIED_WRITE */ #endif /* PNG_WRITE_SUPPORTED */ diff -ru4NwbB libpng-1.5.10/pngwtran.c libpng-1.6.0beta22/pngwtran.c --- libpng-1.5.10/pngwtran.c 2012-03-29 00:06:54.676645577 -0500 +++ libpng-1.6.0beta22/pngwtran.c 2012-05-23 12:30:56.237473002 -0500 @@ -1,9 +1,9 @@ /* pngwtran.c - transforms the data in a row for PNG writers * - * Last changed in libpng 1.5.6 [November 3, 2011] - * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] + * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * * This code is released under the libpng license. @@ -19,9 +19,9 @@ /* Transform the data according to the user's wishes. The order of * transformations is significant. */ void /* PRIVATE */ -png_do_write_transformations(png_structp png_ptr, png_row_infop row_info) +png_do_write_transformations(png_structrp png_ptr, png_row_infop row_info) { png_debug(1, "in png_do_write_transformations"); if (png_ptr == NULL) @@ -286,9 +286,9 @@ if (row_info->bit_depth < 8) { png_bytep bp = row; png_size_t i; - png_byte mask; + unsigned int mask; png_size_t row_bytes = row_info->rowbytes; if (bit_depth->gray == 1 && row_info->bit_depth == 2) mask = 0x55; @@ -300,22 +300,24 @@ mask = 0xff; for (i = 0; i < row_bytes; i++, bp++) { - png_uint_16 v; int j; + unsigned int v, out; v = *bp; - *bp = 0; + out = 0; for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0]) { if (j > 0) - *bp |= (png_byte)((v << j) & 0xff); + out |= v << j; else - *bp |= (png_byte)((v >> (-j)) & mask); + out |= (v >> (-j)) & mask; } + + *bp = (png_byte)(out & 0xff); } } else if (row_info->bit_depth == 8) @@ -326,23 +328,25 @@ for (i = 0; i < istop; i++, bp++) { - png_uint_16 v; + const unsigned int c = i%channels; int j; - int c = (int)(i%channels); + unsigned int v, out; v = *bp; - *bp = 0; + out = 0; for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c]) { if (j > 0) - *bp |= (png_byte)((v << j) & 0xff); + out |= v << j; else - *bp |= (png_byte)((v >> (-j)) & 0xff); + out |= v >> (-j); } + + *bp = (png_byte)(out & 0xff); } } else @@ -352,24 +356,24 @@ png_uint_32 istop = channels * row_info->width; for (bp = row, i = 0; i < istop; i++) { - int c = (int)(i%channels); - png_uint_16 value, v; + const unsigned int c = i%channels; int j; + unsigned int value, v; - v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1)); + v = png_get_uint_16(bp); value = 0; for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c]) { if (j > 0) - value |= (png_uint_16)((v << j) & (png_uint_16)0xffff); + value |= v << j; else - value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff); + value |= v >> (-j); } - *bp++ = (png_byte)(value >> 8); + *bp++ = (png_byte)((value >> 8) & 0xff); *bp++ = (png_byte)(value & 0xff); } } } diff -ru4NwbB libpng-1.5.10/pngwutil.c libpng-1.6.0beta22/pngwutil.c --- libpng-1.5.10/pngwutil.c 2012-03-29 00:06:54.689775945 -0500 +++ libpng-1.6.0beta22/pngwutil.c 2012-05-23 12:30:56.250246559 -0500 @@ -1,8 +1,8 @@ /* pngwutil.c - utilities to write a PNG file * - * Last changed in libpng 1.5.10 [March 8, 2012] + * Last changed in libpng 1.6.0 [(PENDING RELEASE)] * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -64,9 +64,9 @@ * we should call png_set_sig_bytes() to tell libpng how many of the * bytes have already been written. */ void PNGAPI -png_write_sig(png_structp png_ptr) +png_write_sig(png_structrp png_ptr) { png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; #ifdef PNG_IO_STATE_SUPPORTED @@ -86,9 +86,9 @@ * The total_length is the sum of the lengths of all the data you will be * passing in png_write_chunk_data(). */ static void -png_write_chunk_header(png_structp png_ptr, png_uint_32 chunk_name, +png_write_chunk_header(png_structrp png_ptr, png_uint_32 chunk_name, png_uint_32 length) { png_byte buf[8]; @@ -128,9 +128,9 @@ #endif } void PNGAPI -png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_string, +png_write_chunk_start(png_structrp png_ptr, png_const_bytep chunk_string, png_uint_32 length) { png_write_chunk_header(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), length); } @@ -140,9 +140,9 @@ * sum of the lengths from these calls *must* add up to the total_length * given to png_write_chunk_header(). */ void PNGAPI -png_write_chunk_data(png_structp png_ptr, png_const_bytep data, +png_write_chunk_data(png_structrp png_ptr, png_const_bytep data, png_size_t length) { /* Write the data, and run the CRC over it */ if (png_ptr == NULL) @@ -160,9 +160,9 @@ } /* Finish a chunk started with png_write_chunk_header(). */ void PNGAPI -png_write_chunk_end(png_structp png_ptr) +png_write_chunk_end(png_structrp png_ptr) { png_byte buf[4]; if (png_ptr == NULL) return; @@ -189,16 +189,16 @@ * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end() * functions instead. */ static void -png_write_complete_chunk(png_structp png_ptr, png_uint_32 chunk_name, +png_write_complete_chunk(png_structrp png_ptr, png_uint_32 chunk_name, png_const_bytep data, png_size_t length) { if (png_ptr == NULL) return; /* On 64 bit architectures 'length' may not fit in a png_uint_32. */ - if (length > PNG_UINT_32_MAX) + if (length > PNG_UINT_31_MAX) png_error(png_ptr, "length exceeds PNG maxima"); png_write_chunk_header(png_ptr, chunk_name, (png_uint_32)length); png_write_chunk_data(png_ptr, data, length); @@ -206,476 +206,569 @@ } /* This is the API that calls the internal function above. */ void PNGAPI -png_write_chunk(png_structp png_ptr, png_const_bytep chunk_string, +png_write_chunk(png_structrp png_ptr, png_const_bytep chunk_string, png_const_bytep data, png_size_t length) { png_write_complete_chunk(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), data, length); } -/* Initialize the compressor for the appropriate type of compression. */ -static void -png_zlib_claim(png_structp png_ptr, png_uint_32 state) +/* This is used below to find the size of an image to pass to png_deflate_claim, + * so it only needs to be accurate if the size is less than 16384 bytes (the + * point at which a lower LZ window size can be used.) + */ +static png_alloc_size_t +png_image_size(png_structrp png_ptr) { - if (!(png_ptr->zlib_state & PNG_ZLIB_IN_USE)) + /* Only return sizes up to the maximum of a png_uint_32, do this by limiting + * the width and height used to 15 bits. + */ + png_uint_32 h = png_ptr->height; + + if (png_ptr->rowbytes < 32768 && h < 32768) { - /* If already initialized for 'state' do not re-init. */ - if (png_ptr->zlib_state != state) + if (png_ptr->interlaced) { - int ret = Z_OK; - png_const_charp who = "-"; + /* Interlacing makes the image larger because of the replication of + * both the filter byte and the padding to a byte boundary. + */ + png_uint_32 w = png_ptr->width; + unsigned int pd = png_ptr->pixel_depth; + png_alloc_size_t cbBase; + int pass; - /* If actually initialized for another state do a deflateEnd. */ - if (png_ptr->zlib_state != PNG_ZLIB_UNINITIALIZED) + for (cbBase=0, pass=0; pass<=6; ++pass) { - ret = deflateEnd(&png_ptr->zstream); - who = "end"; - png_ptr->zlib_state = PNG_ZLIB_UNINITIALIZED; + png_uint_32 pw = PNG_PASS_COLS(w, pass); + + if (pw > 0) + cbBase += (PNG_ROWBYTES(pd, pw)+1) * PNG_PASS_ROWS(h, pass); } - /* zlib itself detects an incomplete state on deflateEnd */ - if (ret == Z_OK) switch (state) - { -# ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED - case PNG_ZLIB_FOR_TEXT: - ret = deflateInit2(&png_ptr->zstream, - png_ptr->zlib_text_level, png_ptr->zlib_text_method, - png_ptr->zlib_text_window_bits, - png_ptr->zlib_text_mem_level, png_ptr->zlib_text_strategy); - who = "text"; - break; -# endif + return cbBase; + } - case PNG_ZLIB_FOR_IDAT: - ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level, - png_ptr->zlib_method, png_ptr->zlib_window_bits, - png_ptr->zlib_mem_level, png_ptr->zlib_strategy); - who = "IDAT"; - break; + else + return (png_ptr->rowbytes+1) * h; + } - default: - png_error(png_ptr, "invalid zlib state"); + else + return 0xffffffffU; } - if (ret == Z_OK) - png_ptr->zlib_state = state; +#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED + /* This is the code to hack the first two bytes of the deflate stream (the + * deflate header) to correct the windowBits value to match the actual data + * size. Note that the second argument is the *uncompressed* size but the + * first argument is the *compressed* data (and it must be deflate + * compressed.) + */ +static void +optimize_cmf(png_bytep data, png_alloc_size_t data_size) +{ + /* Optimize the CMF field in the zlib stream. The resultant zlib stream is + * still compliant to the stream specification. + */ + if (data_size <= 16384) /* else windowBits must be 15 */ + { + unsigned int z_cmf = data[0]; /* zlib compression method and flags */ - else /* an error in deflateEnd or deflateInit2 */ + if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) { - size_t pos = 0; - char msg[64]; + unsigned int z_cinfo; + unsigned int half_z_window_size; - pos = png_safecat(msg, sizeof msg, pos, - "zlib failed to initialize compressor ("); - pos = png_safecat(msg, sizeof msg, pos, who); + z_cinfo = z_cmf >> 4; + half_z_window_size = 1U << (z_cinfo + 7); - switch (ret) + if (data_size <= half_z_window_size) /* else no change */ { - case Z_VERSION_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") version error"); - break; + unsigned int tmp; - case Z_STREAM_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") stream error"); - break; + do + { + half_z_window_size >>= 1; + --z_cinfo; + } + while (z_cinfo > 0 && data_size <= half_z_window_size); - case Z_MEM_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") memory error"); - break; + z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); - default: - pos = png_safecat(msg, sizeof msg, pos, ") unknown error"); - break; + data[0] = (png_byte)z_cmf; + tmp = data[1] & 0xe0; + tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; + data[1] = (png_byte)tmp; + } } - - png_error(png_ptr, msg); } } +#else +# define optimize_cmf(dp,dl) ((void)0) +#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ + +/* Initialize the compressor for the appropriate type of compression. */ +static int +png_deflate_claim(png_structrp png_ptr, png_uint_32 owner, + png_alloc_size_t data_size) +{ + if (png_ptr->zowner != 0) + { + char msg[64]; + + PNG_STRING_FROM_CHUNK(msg, owner); + msg[4] = ':'; + msg[5] = ' '; + PNG_STRING_FROM_CHUNK(msg+6, png_ptr->zowner); + /* So the message that results is " using zstream"; this is an + * internal error, but is very useful for debugging. i18n requirements + * are minimal. + */ + (void)png_safecat(msg, sizeof msg, 10, " using zstream"); +# if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC + png_warning(png_ptr, msg); - /* Here on success, claim the zstream: */ - png_ptr->zlib_state |= PNG_ZLIB_IN_USE; + /* Attempt sane error recovery */ + if (png_ptr->zowner == png_IDAT) /* don't steal from IDAT */ + { + png_ptr->zstream.msg = PNGZ_MSG_CAST("in use by IDAT"); + return Z_STREAM_ERROR; } - else - png_error(png_ptr, "zstream already in use (internal error)"); + png_ptr->zowner = 0; +# else + png_error(png_ptr, msg); +# endif } -/* The opposite: release the stream. It is also reset, this API will warn on - * error but will not fail. - */ -static void -png_zlib_release(png_structp png_ptr) { - if (png_ptr->zlib_state & PNG_ZLIB_IN_USE) + int level = png_ptr->zlib_level; + int method = png_ptr->zlib_method; + int windowBits = png_ptr->zlib_window_bits; + int memLevel = png_ptr->zlib_mem_level; + int strategy; /* set below */ + int ret; /* zlib return code */ + + if (owner == png_IDAT) { - int ret = deflateReset(&png_ptr->zstream); + if (png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY) + strategy = png_ptr->zlib_strategy; - png_ptr->zlib_state &= ~PNG_ZLIB_IN_USE; + else if (png_ptr->do_filter != PNG_FILTER_NONE) + strategy = Z_FILTERED; - if (ret != Z_OK) + else + strategy = Z_DEFAULT_STRATEGY; + } + + else { - png_const_charp err; - PNG_WARNING_PARAMETERS(p) +# ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED + level = png_ptr->zlib_text_level; + method = png_ptr->zlib_text_method; + windowBits = png_ptr->zlib_text_window_bits; + memLevel = png_ptr->zlib_text_mem_level; + strategy = png_ptr->zlib_text_strategy; +# else + /* If customization is not supported the values all come from the + * IDAT values except for the strategy, which is fixed to the + * default. (This is the pre-1.6.0 behavior too, although it was + * implemented in a very different way.) + */ + strategy = Z_DEFAULT_STRATEGY; +# endif + } - switch (ret) + /* Adjust 'windowBits' down if larger than 'data_size'; to stop this + * happening just pass 32768 as the data_size parameter. Notice that zlib + * requires an extra 262 bytes in the window in addition to the data to be + * able to see the whole of the data, so if data_size+262 takes us to the + * next windowBits size we need to fix up the value later. (Because even + * though deflate needs the extra window, inflate does not!) + */ + if (data_size <= 16384) { - case Z_VERSION_ERROR: - err = "version"; - break; + /* IMPLEMENTATION NOTE: this 'half_window_size' stuff is only here to + * work round a Microsoft Visual C misbehavior which, contrary to C-90, + * widens the result of the following shift to 64-bits if (and, + * apparently, only if) it is used in a test. + */ + unsigned int half_window_size = 1U << (windowBits-1); - case Z_STREAM_ERROR: - err = "stream"; - break; + while (data_size + 262 <= half_window_size) + { + half_window_size >>= 1; + --windowBits; + } + } - case Z_MEM_ERROR: - err = "memory"; - break; + /* Check against the previous initialized values, if any. */ + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) && + (png_ptr->zlib_set_level != level || + png_ptr->zlib_set_method != method || + png_ptr->zlib_set_window_bits != windowBits || + png_ptr->zlib_set_mem_level != memLevel || + png_ptr->zlib_set_strategy != strategy)) + { + if (deflateEnd(&png_ptr->zstream) != Z_OK) + png_warning(png_ptr, "deflateEnd failed (ignored)"); - default: - err = "unknown"; - break; + png_ptr->flags &= ~PNG_FLAG_ZSTREAM_INITIALIZED; } - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, ret); - png_warning_parameter(p, 2, err); + /* For safety clear out the input and output pointers (currently zlib + * doesn't use them on Init, but it might in the future). + */ + png_ptr->zstream.next_in = NULL; + png_ptr->zstream.avail_in = 0; + png_ptr->zstream.next_out = NULL; + png_ptr->zstream.avail_out = 0; + + /* Now initialize if required, setting the new parameters, otherwise just + * to a simple reset to the previous parameters. + */ + if (png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) + ret = deflateReset(&png_ptr->zstream); - if (png_ptr->zstream.msg) - err = png_ptr->zstream.msg; else - err = "[no zlib message]"; - - png_warning_parameter(p, 3, err); + { + ret = deflateInit2(&png_ptr->zstream, level, method, windowBits, + memLevel, strategy); - png_formatted_warning(png_ptr, p, - "zlib failed to reset compressor: @1(@2): @3"); - } + if (ret == Z_OK) + png_ptr->flags |= PNG_FLAG_ZSTREAM_INITIALIZED; } + /* The return code is from either deflateReset or deflateInit2; they have + * pretty much the same set of error codes. + */ + if (ret == Z_OK) + png_ptr->zowner = owner; + else - png_warning(png_ptr, "zstream not in use (internal error)"); + png_zstream_error(png_ptr, ret); + + return ret; + } } #ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED /* This pair of functions encapsulates the operation of (a) compressing a * text string, and (b) issuing it later as a series of chunk data writes. * The compression_state structure is shared context for these functions - * set up by the caller in order to make the whole mess thread-safe. + * set up by the caller to allow access to the relevant local variables. + * + * compression_buffer (new in 1.6.0) is just a linked list of zbuffer_size + * temporary buffers. From 1.6.0 it is retained in png_struct so that it will + * be correctly freed in the event of a write error (previous implementations + * just leaked memory.) */ - typedef struct { png_const_bytep input; /* The uncompressed input data */ - png_size_t input_len; /* Its length */ - int num_output_ptr; /* Number of output pointers used */ - int max_output_ptr; /* Size of output_ptr */ - png_bytep *output_ptr; /* Array of pointers to output */ + png_alloc_size_t input_len; /* Its length */ + png_uint_32 output_len; /* Final compressed length */ + png_byte output[1024]; /* First block of output */ } compression_state; -/* Compress given text into storage in the png_ptr structure */ -static int /* PRIVATE */ -png_text_compress(png_structp png_ptr, - png_const_charp text, png_size_t text_len, int compression, - compression_state *comp) -{ - int ret; - - comp->num_output_ptr = 0; - comp->max_output_ptr = 0; - comp->output_ptr = NULL; - comp->input = NULL; - comp->input_len = text_len; - - /* We may just want to pass the text right through */ - if (compression == PNG_TEXT_COMPRESSION_NONE) +static void +png_text_compress_init(compression_state *comp, png_const_bytep input, + png_alloc_size_t input_len) { - comp->input = (png_const_bytep)text; - return((int)text_len); + comp->input = input; + comp->input_len = input_len; + comp->output_len = 0; } - if (compression >= PNG_TEXT_COMPRESSION_LAST) +void /* PRIVATE */ +png_free_buffer_list(png_structrp png_ptr, png_compression_bufferp *listp) { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, - compression); - png_formatted_warning(png_ptr, p, "Unknown compression type @1"); - } - - /* We can't write the chunk until we find out how much data we have, - * which means we need to run the compressor first and save the - * output. This shouldn't be a problem, as the vast majority of - * comments should be reasonable, but we will set up an array of - * malloc'd pointers to be sure. - * - * If we knew the application was well behaved, we could simplify this - * greatly by assuming we can always malloc an output buffer large - * enough to hold the compressed text ((1001 * text_len / 1000) + 12) - * and malloc this directly. The only time this would be a bad idea is - * if we can't malloc more than 64K and we have 64K of random input - * data, or if the input string is incredibly large (although this - * wouldn't cause a failure, just a slowdown due to swapping). - */ - png_zlib_claim(png_ptr, PNG_ZLIB_FOR_TEXT); - - /* Set up the compression buffers */ - /* TODO: the following cast hides a potential overflow problem. */ - png_ptr->zstream.avail_in = (uInt)text_len; - - /* NOTE: assume zlib doesn't overwrite the input */ - png_ptr->zstream.next_in = (Bytef *)text; - png_ptr->zstream.avail_out = png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; + png_compression_bufferp list = *listp; - /* This is the same compression loop as in png_write_row() */ - do + if (list != NULL) { - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); + *listp = NULL; - if (ret != Z_OK) + do { - /* Error */ - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); + png_compression_bufferp next = list->next; - else - png_error(png_ptr, "zlib error"); + png_free(png_ptr, list); + list = next; + } + while (list != NULL); + } } - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - /* Make sure the output array has room */ - if (comp->num_output_ptr >= comp->max_output_ptr) +/* Compress the data in the compression state input */ +static int +png_text_compress(png_structrp png_ptr, png_uint_32 chunk_name, + compression_state *comp, png_uint_32 prefix_len) { - int old_max; + int ret; - old_max = comp->max_output_ptr; - comp->max_output_ptr = comp->num_output_ptr + 4; - if (comp->output_ptr != NULL) - { - png_bytepp old_ptr; + /* To find the length of the output it is necessary to first compress the + * input, the result is buffered rather than using the two-pass algorithm + * that is used on the inflate side; deflate is assumed to be slower and a + * PNG writer is assumed to have more memory available than a PNG reader. + * + * IMPLEMENTATION NOTE: the zlib API deflateBound() can be used to find an + * upper limit on the output size, but it is always bigger than the input + * size so it is likely to be more efficient to use this linked-list + * approach. + */ + ret = png_deflate_claim(png_ptr, chunk_name, comp->input_len); - old_ptr = comp->output_ptr; + if (ret != Z_OK) + return ret; - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t) - (comp->max_output_ptr * png_sizeof(png_charpp))); + /* Set up the compression buffers, we need a loop here to avoid overflowing a + * uInt. Use ZLIB_IO_MAX to limit the input. The output is always limited + * by the output buffer size, so there is no need to check that. Since this + * is ANSI-C we know that an 'int', hence a uInt, is always at least 16 bits + * in size. + */ + { + png_compression_bufferp *end = &png_ptr->zbuffer_list; + png_alloc_size_t input_len = comp->input_len; /* may be zero! */ + png_uint_32 output_len; + + /* zlib updates these for us: */ + png_ptr->zstream.next_in = PNGZ_INPUT_CAST(comp->input); + png_ptr->zstream.avail_in = 0; /* Set below */ + png_ptr->zstream.next_out = comp->output; + png_ptr->zstream.avail_out = sizeof comp->output; - png_memcpy(comp->output_ptr, old_ptr, old_max - * png_sizeof(png_charp)); + output_len = png_ptr->zstream.avail_out; - png_free(png_ptr, old_ptr); - } - else - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t) - (comp->max_output_ptr * png_sizeof(png_charp))); - } - - /* Save the data */ - comp->output_ptr[comp->num_output_ptr] = - (png_bytep)png_malloc(png_ptr, - (png_alloc_size_t)png_ptr->zbuf_size); + do + { + uInt avail_in = ZLIB_IO_MAX; - png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); + if (avail_in > input_len) + avail_in = (uInt)input_len; - comp->num_output_ptr++; + input_len -= avail_in; - /* and reset the buffer */ - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - } - /* Continue until we don't have any more to compress */ - } while (png_ptr->zstream.avail_in); + png_ptr->zstream.avail_in = avail_in; - /* Finish the compression */ - do + if (png_ptr->zstream.avail_out == 0) { - /* Tell zlib we are finished */ - ret = deflate(&png_ptr->zstream, Z_FINISH); + png_compression_buffer *next; - if (ret == Z_OK) - { - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) + /* Chunk data is limited to 2^31 bytes in length, so the prefix + * length must be counted here. + */ + if (output_len + prefix_len > PNG_UINT_31_MAX) { - /* Check to make sure our output array has room */ - if (comp->num_output_ptr >= comp->max_output_ptr) + ret = Z_MEM_ERROR; + break; + } + + /* Need a new (malloc'ed) buffer, but there may be one present + * already. + */ + next = *end; + if (next == NULL) { - int old_max; + next = png_voidcast(png_compression_bufferp, png_malloc_base + (png_ptr, PNG_COMPRESSION_BUFFER_SIZE(png_ptr))); - old_max = comp->max_output_ptr; - comp->max_output_ptr = comp->num_output_ptr + 4; - if (comp->output_ptr != NULL) + if (next == NULL) { - png_bytepp old_ptr; + ret = Z_MEM_ERROR; + break; + } - old_ptr = comp->output_ptr; + /* Link in this buffer (so that it will be freed later) */ + next->next = NULL; + *end = next; + } + + png_ptr->zstream.next_out = next->output; + png_ptr->zstream.avail_out = png_ptr->zbuffer_size; + output_len += png_ptr->zstream.avail_out; - /* This could be optimized to realloc() */ - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t)(comp->max_output_ptr * - png_sizeof(png_charp))); + /* Move 'end' to the next buffer pointer. */ + end = &next->next; + } - png_memcpy(comp->output_ptr, old_ptr, - old_max * png_sizeof(png_charp)); + /* Compress the data */ + ret = deflate(&png_ptr->zstream, + input_len > 0 ? Z_NO_FLUSH : Z_FINISH); - png_free(png_ptr, old_ptr); + /* Claw back input data that was not consumed (because avail_in is + * reset above every time round the loop). + */ + input_len += png_ptr->zstream.avail_in; + png_ptr->zstream.avail_in = 0; /* safety */ } + while (ret == Z_OK); - else - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t)(comp->max_output_ptr * - png_sizeof(png_charp))); + /* There may be some space left in the last output buffer, this needs to + * be subtracted from output_len. + */ + output_len -= png_ptr->zstream.avail_out; + png_ptr->zstream.avail_out = 0; /* safety */ + comp->output_len = output_len; + + /* Now double check the output length, put in a custom message if it is + * too long. Otherwise ensure the z_stream::msg pointer is set to + * something. + */ + if (output_len + prefix_len >= PNG_UINT_31_MAX) + { + png_ptr->zstream.msg = PNGZ_MSG_CAST("compressed data too long"); + ret = Z_MEM_ERROR; } - /* Save the data */ - comp->output_ptr[comp->num_output_ptr] = - (png_bytep)png_malloc(png_ptr, - (png_alloc_size_t)png_ptr->zbuf_size); + else + png_zstream_error(png_ptr, ret); - png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); + /* Reset zlib for another zTXt/iTXt or image data */ + png_ptr->zowner = 0; - comp->num_output_ptr++; + /* The only success case is Z_STREAM_END, input_len must be 0, if not this + * is an internal error. + */ + if (ret == Z_STREAM_END && input_len == 0) + { + /* Fix up the deflate header, if required */ + optimize_cmf(comp->output, comp->input_len); - /* and reset the buffer pointers */ - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - } + /* But Z_OK is returned, not Z_STREAM_END; this allows the claim + * function above to return Z_STREAM_END on an error (though it never + * does in the current versions of zlib.) + */ + return Z_OK; } - else if (ret != Z_STREAM_END) - { - /* We got an error */ - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); else - png_error(png_ptr, "zlib error"); + return ret; } - } while (ret != Z_STREAM_END); - - /* Text length is number of buffers plus last buffer */ - text_len = png_ptr->zbuf_size * comp->num_output_ptr; - - if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) - text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out; - - return((int)text_len); } /* Ship the compressed text out via chunk writes */ -static void /* PRIVATE */ -png_write_compressed_data_out(png_structp png_ptr, compression_state *comp, - png_size_t data_len) +static void +png_write_compressed_data_out(png_structrp png_ptr, compression_state *comp) { - int i; + png_uint_32 output_len = comp->output_len; + png_const_bytep output = comp->output; + png_uint_32 avail = sizeof comp->output; + png_compression_buffer *next = png_ptr->zbuffer_list; - /* Handle the no-compression case */ - if (comp->input) + for (;;) { - png_write_chunk_data(png_ptr, comp->input, data_len); + if (avail > output_len) + avail = output_len; - return; - } + png_write_chunk_data(png_ptr, output, avail); -#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED - /* The zbuf_size test is because the code below doesn't work if zbuf_size is - * '1'; simply skip it to avoid memory overwrite. - */ - if (data_len >= 2 && comp->input_len < 16384 && png_ptr->zbuf_size > 1) - { - unsigned int z_cmf; /* zlib compression method and flags */ + output_len -= avail; - /* Optimize the CMF field in the zlib stream. This hack of the zlib - * stream is compliant to the stream specification. - */ + if (output_len == 0 || next == NULL) + break; - if (comp->num_output_ptr) - z_cmf = comp->output_ptr[0][0]; - else - z_cmf = png_ptr->zbuf[0]; + avail = png_ptr->zbuffer_size; + output = next->output; + next = next->next; + } - if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) - { - unsigned int z_cinfo; - unsigned int half_z_window_size; - png_size_t uncompressed_text_size = comp->input_len; + /* This is an internal error; 'next' must have been NULL! */ + if (output_len > 0) + png_error(png_ptr, "error writing ancilliary chunked compressed data"); +} +#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ - z_cinfo = z_cmf >> 4; - half_z_window_size = 1 << (z_cinfo + 7); +#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ + defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) +/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, + * and if invalid, correct the keyword rather than discarding the entire + * chunk. The PNG 1.0 specification requires keywords 1-79 characters in + * length, forbids leading or trailing whitespace, multiple internal spaces, + * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. + * + * The 'new_key' buffer must be 80 characters in size (for the keyword plus a + * trailing '\0'). If this routine returns 0 then there was no keyword, or a + * valid one could not be generated, and the caller must png_error. + */ +static png_uint_32 +png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key) +{ + png_const_charp orig_key = key; + png_uint_32 key_len = 0; + int bad_character = 0; + int space = 1; - while (uncompressed_text_size <= half_z_window_size && - half_z_window_size >= 256) + png_debug(1, "in png_check_keyword"); + + if (key == NULL) { - z_cinfo--; - half_z_window_size >>= 1; + *new_key = 0; + return 0; } - z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); - - if (comp->num_output_ptr) + while (*key && key_len < 79) { + png_byte ch = (png_byte)(0xff & *key++); - if (comp->output_ptr[0][0] != z_cmf) - { - int tmp; + if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/)) + *new_key++ = ch, ++key_len, space = 0; - comp->output_ptr[0][0] = (png_byte)z_cmf; - tmp = comp->output_ptr[0][1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - comp->output_ptr[0][1] = (png_byte)tmp; - } - } - else + else if (!space) { - int tmp; + /* A space or an invalid character when one wasn't seen immediately + * before; output just a space. + */ + *new_key++ = 32, ++key_len, space = 1; - png_ptr->zbuf[0] = (png_byte)z_cmf; - tmp = png_ptr->zbuf[1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - png_ptr->zbuf[1] = (png_byte)tmp; - } + /* If the character was not a space then it is invalid. */ + if (ch != 32) + bad_character = ch; } - else - png_error(png_ptr, - "Invalid zlib compression method or flags in non-IDAT chunk"); + else if (!bad_character) + bad_character = ch; /* just skip it, record the first error */ } -#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ - /* Write saved output buffers, if any */ - for (i = 0; i < comp->num_output_ptr; i++) + if (key_len > 0 && space) /* trailing space */ { - png_write_chunk_data(png_ptr, comp->output_ptr[i], - (png_size_t)png_ptr->zbuf_size); - - png_free(png_ptr, comp->output_ptr[i]); + --key_len, --new_key; + if (!bad_character) + bad_character = 32; } - if (comp->max_output_ptr != 0) - png_free(png_ptr, comp->output_ptr); + /* Terminate the keyword */ + *new_key = 0; - /* Write anything left in zbuf */ - if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size) - png_write_chunk_data(png_ptr, png_ptr->zbuf, - (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out)); + if (key_len == 0) + return 0; - /* Reset zlib for another zTXt/iTXt or image data */ - png_zlib_release(png_ptr); + /* Try to only output one warning per keyword: */ + if (*key) /* keyword too long */ + png_warning(png_ptr, "keyword truncated"); + + else if (bad_character) + { + PNG_WARNING_PARAMETERS(p) + + png_warning_parameter(p, 1, orig_key); + png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_02x, bad_character); + + png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'"); } -#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ + + return key_len; +} +#endif /* Write the IHDR chunk, and update the png_struct with the necessary * information. Note that the rest of this code depends upon this * information being correct. */ void /* PRIVATE */ -png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, +png_write_IHDR(png_structrp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int compression_type, int filter_type, int interlace_type) { png_byte buf[13]; /* Buffer to store the IHDR info */ @@ -820,13 +913,8 @@ /* Write the chunk */ png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13); - /* Initialize zlib with PNG info */ - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - if (!(png_ptr->do_filter)) { if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE || png_ptr->bit_depth < 8) @@ -835,66 +923,17 @@ else png_ptr->do_filter = PNG_ALL_FILTERS; } - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY)) - { - if (png_ptr->do_filter != PNG_FILTER_NONE) - png_ptr->zlib_strategy = Z_FILTERED; - - else - png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY; - } - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL)) - png_ptr->zlib_level = Z_DEFAULT_COMPRESSION; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL)) - png_ptr->zlib_mem_level = 8; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS)) - png_ptr->zlib_window_bits = 15; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD)) - png_ptr->zlib_method = 8; - -#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED -#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_STRATEGY)) - png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_LEVEL)) - png_ptr->zlib_text_level = png_ptr->zlib_level; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL)) - png_ptr->zlib_text_mem_level = png_ptr->zlib_mem_level; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS)) - png_ptr->zlib_text_window_bits = png_ptr->zlib_window_bits; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_METHOD)) - png_ptr->zlib_text_method = png_ptr->zlib_method; -#else - png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; - png_ptr->zlib_text_level = png_ptr->zlib_level; - png_ptr->zlib_text_mem_level = png_ptr->zlib_mem_level; - png_ptr->zlib_text_window_bits = png_ptr->zlib_window_bits; - png_ptr->zlib_text_method = png_ptr->zlib_method; -#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ -#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ - - /* Record that the compressor has not yet been initialized. */ - png_ptr->zlib_state = PNG_ZLIB_UNINITIALIZED; - png_ptr->mode = PNG_HAVE_IHDR; /* not READY_FOR_ZTXT */ } /* Write the palette. We are careful not to trust png_color to be in the * correct order for PNG, so people can redefine it to any convenient * structure. */ void /* PRIVATE */ -png_write_PLTE(png_structp png_ptr, png_const_colorp palette, +png_write_PLTE(png_structrp png_ptr, png_const_colorp palette, png_uint_32 num_pal) { png_uint_32 i; png_const_colorp pal_ptr; @@ -960,96 +999,165 @@ png_write_chunk_end(png_ptr); png_ptr->mode |= PNG_HAVE_PLTE; } -/* Write an IDAT chunk */ +/* This is similar to png_text_compress, above, except that it does not require + * all of the data at once and, instead of buffering the compressed result, + * writes it as IDAT chunks. Unlike png_text_compress it *can* png_error out + * because it calls the write interface. As a result it does its own error + * reporting and does not return an error code. In the event of error it will + * just call png_error. The input data length may exceed 32-bits. The 'flush' + * parameter is exactly the same as that to deflate, with the following + * meanings: + * + * Z_NO_FLUSH: normal incremental output of compressed data + * Z_SYNC_FLUSH: do a SYNC_FLUSH, used by png_write_flush + * Z_FINISH: this is the end of the input, do a Z_FINISH and clean up + * + * The routine manages the acquire and release of the png_ptr->zstream by + * checking and (at the end) clearing png_ptr->zowner, it does some sanity + * checks on the 'mode' flags while doing this. + */ void /* PRIVATE */ -png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length) +png_compress_IDAT(png_structrp png_ptr, png_const_bytep input, + png_alloc_size_t input_len, int flush) { - png_debug(1, "in png_write_IDAT"); - -#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED - if (!(png_ptr->mode & PNG_HAVE_IDAT) && - png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE) + if (png_ptr->zowner != png_IDAT) { - /* Optimize the CMF field in the zlib stream. This hack of the zlib - * stream is compliant to the stream specification. + /* First time. Ensure we have a temporary buffer for compression and + * trim the buffer list if it has more than one entry to free memory. */ - unsigned int z_cmf = data[0]; /* zlib compression method and flags */ - - if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) + if (png_ptr->zbuffer_list == NULL) { - /* Avoid memory underflows and multiplication overflows. - * - * The conditions below are practically always satisfied; - * however, they still must be checked. + png_ptr->zbuffer_list = png_voidcast(png_compression_bufferp, + png_malloc(png_ptr, PNG_COMPRESSION_BUFFER_SIZE(png_ptr))); + png_ptr->zbuffer_list->next = NULL; + } + + else + png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list->next); + + /* It is a terminal error if we can't claim the zstream. */ + if (png_deflate_claim(png_ptr, png_IDAT, png_image_size(png_ptr)) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); + + /* The output state is maintained in png_ptr->zstream, so it must be + * initialized here after the claim. + */ + png_ptr->zstream.next_out = png_ptr->zbuffer_list->output; + png_ptr->zstream.avail_out = png_ptr->zbuffer_size; + } + + /* Now loop reading and writing until all the input is consumed or an error + * terminates the operation. The _out values are maintained across calls to + * this function, but the input must be reset each time. */ - if (length >= 2 && - png_ptr->height < 16384 && png_ptr->width < 16384) + png_ptr->zstream.next_in = PNGZ_INPUT_CAST(input); + png_ptr->zstream.avail_in = 0; /* set below */ + for (;;) { - /* Compute the maximum possible length of the datastream */ + int ret; + + /* INPUT: from the row data */ + uInt avail = ZLIB_IO_MAX; + + if (avail > input_len) + avail = (uInt)input_len; /* safe because of the check */ + + png_ptr->zstream.avail_in = avail; + input_len -= avail; - /* Number of pixels, plus for each row a filter byte - * and possibly a padding byte, so increase the maximum - * size to account for these. + ret = deflate(&png_ptr->zstream, input_len > 0 ? Z_NO_FLUSH : flush); + + /* Include as-yet unconsumed input */ + input_len += png_ptr->zstream.avail_in; + png_ptr->zstream.avail_in = 0; + + /* OUTPUT: write complete IDAT chunks when avail_out drops to zero, note + * that these two zstream fields are preserved across the calls, therefore + * there is no need to set these up on entry to the loop. */ - unsigned int z_cinfo; - unsigned int half_z_window_size; - png_uint_32 uncompressed_idat_size = png_ptr->height * - ((png_ptr->width * - png_ptr->channels * png_ptr->bit_depth + 15) >> 3); - - /* If it's interlaced, each block of 8 rows is sent as up to - * 14 rows, i.e., 6 additional rows, each with a filter byte - * and possibly a padding byte + if (png_ptr->zstream.avail_out == 0) + { + png_bytep data = png_ptr->zbuffer_list->output; + uInt size = png_ptr->zbuffer_size; + + /* Write an IDAT containing the data then reset the buffer. The + * first IDAT may need deflate header optimization. */ - if (png_ptr->interlaced) - uncompressed_idat_size += ((png_ptr->height + 7)/8) * - (png_ptr->bit_depth < 8 ? 12 : 6); +# ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED + if (!(png_ptr->mode & PNG_HAVE_IDAT) && + png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE) + optimize_cmf(data, png_image_size(png_ptr)); +# endif - z_cinfo = z_cmf >> 4; - half_z_window_size = 1 << (z_cinfo + 7); + png_write_complete_chunk(png_ptr, png_IDAT, data, size); + png_ptr->mode |= PNG_HAVE_IDAT; - while (uncompressed_idat_size <= half_z_window_size && - half_z_window_size >= 256) - { - z_cinfo--; - half_z_window_size >>= 1; - } + png_ptr->zstream.next_out = data; + png_ptr->zstream.avail_out = size; - z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); + /* For SYNC_FLUSH or FINISH it is essential to keep calling zlib with + * the same flush parameter until it has finished output, for NO_FLUSH + * it doesn't matter. + */ + if (ret == Z_OK && flush != Z_NO_FLUSH) + continue; + } - if (data[0] != z_cmf) + /* The order of these checks doesn't matter much; it just effect which + * possible error might be detected if multiple things go wrong at once. + */ + if (ret == Z_OK) /* most likely return code! */ { - int tmp; - data[0] = (png_byte)z_cmf; - tmp = data[1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - data[1] = (png_byte)tmp; + /* If all the input has been consumed then just return. If Z_FINISH + * was used as the flush parameter something has gone wrong if we get + * here. + */ + if (input_len == 0) + { + if (flush == Z_FINISH) + png_error(png_ptr, "Z_OK on Z_FINISH with output space"); + + return; } } + + else if (ret == Z_STREAM_END && flush == Z_FINISH) + { + /* This is the end of the IDAT data; any pending output must be + * flushed. For small PNG files we may still be at the beginning. + */ + png_bytep data = png_ptr->zbuffer_list->output; + uInt size = png_ptr->zbuffer_size - png_ptr->zstream.avail_out; + +# ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED + if (!(png_ptr->mode & PNG_HAVE_IDAT) && + png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE) + optimize_cmf(data, png_image_size(png_ptr)); +# endif + + png_write_complete_chunk(png_ptr, png_IDAT, data, size); + png_ptr->zstream.avail_out = 0; + png_ptr->zstream.next_out = NULL; + png_ptr->mode |= PNG_HAVE_IDAT | PNG_AFTER_IDAT; + + png_ptr->zowner = 0; /* Release the stream */ + return; } else - png_error(png_ptr, - "Invalid zlib compression method or flags in IDAT"); + { + /* This is an error condition. */ + png_zstream_error(png_ptr, ret); + png_error(png_ptr, png_ptr->zstream.msg); + } } -#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ - - png_write_complete_chunk(png_ptr, png_IDAT, data, length); - png_ptr->mode |= PNG_HAVE_IDAT; - - /* Prior to 1.5.4 this code was replicated in every caller (except at the - * end, where it isn't technically necessary). Since this function has - * flushed the data we can safely reset the zlib output buffer here. - */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; } /* Write an IEND chunk */ void /* PRIVATE */ -png_write_IEND(png_structp png_ptr) +png_write_IEND(png_structrp png_ptr) { png_debug(1, "in png_write_IEND"); png_write_complete_chunk(png_ptr, png_IEND, NULL, (png_size_t)0); @@ -1058,9 +1166,9 @@ #ifdef PNG_WRITE_gAMA_SUPPORTED /* Write a gAMA chunk */ void /* PRIVATE */ -png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma) +png_write_gAMA_fixed(png_structrp png_ptr, png_fixed_point file_gamma) { png_byte buf[4]; png_debug(1, "in png_write_gAMA"); @@ -1073,9 +1181,9 @@ #ifdef PNG_WRITE_sRGB_SUPPORTED /* Write a sRGB chunk */ void /* PRIVATE */ -png_write_sRGB(png_structp png_ptr, int srgb_intent) +png_write_sRGB(png_structrp png_ptr, int srgb_intent) { png_byte buf[1]; png_debug(1, "in png_write_sRGB"); @@ -1091,96 +1199,72 @@ #ifdef PNG_WRITE_iCCP_SUPPORTED /* Write an iCCP chunk */ void /* PRIVATE */ -png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type, - png_const_charp profile, int profile_len) +png_write_iCCP(png_structrp png_ptr, png_const_charp name, + png_const_bytep profile) { - png_size_t name_len; - png_charp new_name; + png_uint_32 name_len; + png_uint_32 profile_len; + png_byte new_name[81]; /* 1 byte for the compression byte */ compression_state comp; - int embedded_profile_len = 0; png_debug(1, "in png_write_iCCP"); - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; - comp.input_len = 0; - - if ((name_len = png_check_keyword(png_ptr, name, &new_name)) == 0) - return; - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - png_warning(png_ptr, "Unknown compression type in iCCP chunk"); - + /* These are all internal problems: the profile should have been checked + * before when it was stored. + */ if (profile == NULL) - profile_len = 0; + png_error(png_ptr, "No profile for iCCP chunk"); /* internal error */ - if (profile_len > 3) - embedded_profile_len = - ((*( (png_const_bytep)profile ))<<24) | - ((*( (png_const_bytep)profile + 1))<<16) | - ((*( (png_const_bytep)profile + 2))<< 8) | - ((*( (png_const_bytep)profile + 3)) ); + profile_len = png_get_uint_32(profile); - if (embedded_profile_len < 0) - { - png_warning(png_ptr, - "Embedded profile length in iCCP chunk is negative"); + if (profile_len < 132) + png_error(png_ptr, "ICC profile too short"); - png_free(png_ptr, new_name); - return; - } + if (profile_len & 0x03) + png_error(png_ptr, "ICC profile length invalid (not a multiple of 4)"); - if (profile_len < embedded_profile_len) { - png_warning(png_ptr, - "Embedded profile length too large in iCCP chunk"); + png_uint_32 embedded_profile_len = png_get_uint_32(profile); - png_free(png_ptr, new_name); - return; + if (profile_len != embedded_profile_len) + png_error(png_ptr, "Profile length does not match profile"); } - if (profile_len > embedded_profile_len) - { - png_warning(png_ptr, - "Truncating profile to actual length in iCCP chunk"); + name_len = png_check_keyword(png_ptr, name, new_name); - profile_len = embedded_profile_len; - } + if (name_len == 0) + png_error(png_ptr, "iCCP: invalid keyword"); - if (profile_len) - profile_len = png_text_compress(png_ptr, profile, - (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp); + new_name[++name_len] = PNG_COMPRESSION_TYPE_BASE; /* Make sure we include the NULL after the name and the compression type */ - png_write_chunk_header(png_ptr, png_iCCP, - (png_uint_32)(name_len + profile_len + 2)); + ++name_len; - new_name[name_len + 1] = 0x00; + png_text_compress_init(&comp, profile, profile_len); - png_write_chunk_data(png_ptr, (png_bytep)new_name, - (png_size_t)(name_len + 2)); + /* Allow for keyword terminator and compression byte */ + if (png_text_compress(png_ptr, png_iCCP, &comp, name_len) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); - if (profile_len) - { - png_write_compressed_data_out(png_ptr, &comp, profile_len); - } + png_write_chunk_header(png_ptr, png_iCCP, name_len + comp.output_len); + + png_write_chunk_data(png_ptr, new_name, name_len); + + png_write_compressed_data_out(png_ptr, &comp); png_write_chunk_end(png_ptr); - png_free(png_ptr, new_name); } #endif #ifdef PNG_WRITE_sPLT_SUPPORTED /* Write a sPLT chunk */ void /* PRIVATE */ -png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) +png_write_sPLT(png_structrp png_ptr, png_const_sPLT_tp spalette) { - png_size_t name_len; - png_charp new_name; + png_uint_32 name_len; + png_byte new_name[80]; png_byte entrybuf[10]; png_size_t entry_size = (spalette->depth == 8 ? 6 : 10); png_size_t palette_size = entry_size * spalette->nentries; png_sPLT_entryp ep; @@ -1189,10 +1273,12 @@ #endif png_debug(1, "in png_write_sPLT"); - if ((name_len = png_check_keyword(png_ptr,spalette->name, &new_name))==0) - return; + name_len = png_check_keyword(png_ptr, spalette->name, new_name); + + if (name_len == 0) + png_error(png_ptr, "sPLT: invalid keyword"); /* Make sure we include the NULL after the name */ png_write_chunk_header(png_ptr, png_sPLT, (png_uint_32)(name_len + 2 + palette_size)); @@ -1223,9 +1309,9 @@ png_save_uint_16(entrybuf + 6, ep->alpha); png_save_uint_16(entrybuf + 8, ep->frequency); } - png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size); + png_write_chunk_data(png_ptr, entrybuf, entry_size); } #else ep=spalette->entries; for (i = 0; i>spalette->nentries; i++) @@ -1247,21 +1333,20 @@ png_save_uint_16(entrybuf + 6, ep[i].alpha); png_save_uint_16(entrybuf + 8, ep[i].frequency); } - png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size); + png_write_chunk_data(png_ptr, entrybuf, entry_size); } #endif png_write_chunk_end(png_ptr); - png_free(png_ptr, new_name); } #endif #ifdef PNG_WRITE_sBIT_SUPPORTED /* Write the sBIT chunk */ void /* PRIVATE */ -png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type) +png_write_sBIT(png_structrp png_ptr, png_const_color_8p sbit, int color_type) { png_byte buf[4]; png_size_t size; @@ -1318,44 +1403,35 @@ #ifdef PNG_WRITE_cHRM_SUPPORTED /* Write the cHRM chunk */ void /* PRIVATE */ -png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, - png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, - png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, - png_fixed_point blue_y) +png_write_cHRM_fixed(png_structrp png_ptr, const png_xy *xy) { png_byte buf[32]; png_debug(1, "in png_write_cHRM"); /* Each value is saved in 1/100,000ths */ -#ifdef PNG_CHECK_cHRM_SUPPORTED - if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y, - green_x, green_y, blue_x, blue_y)) -#endif - { - png_save_uint_32(buf, (png_uint_32)white_x); - png_save_uint_32(buf + 4, (png_uint_32)white_y); + png_save_int_32(buf, xy->whitex); + png_save_int_32(buf + 4, xy->whitey); - png_save_uint_32(buf + 8, (png_uint_32)red_x); - png_save_uint_32(buf + 12, (png_uint_32)red_y); + png_save_int_32(buf + 8, xy->redx); + png_save_int_32(buf + 12, xy->redy); - png_save_uint_32(buf + 16, (png_uint_32)green_x); - png_save_uint_32(buf + 20, (png_uint_32)green_y); + png_save_int_32(buf + 16, xy->greenx); + png_save_int_32(buf + 20, xy->greeny); - png_save_uint_32(buf + 24, (png_uint_32)blue_x); - png_save_uint_32(buf + 28, (png_uint_32)blue_y); + png_save_int_32(buf + 24, xy->bluex); + png_save_int_32(buf + 28, xy->bluey); - png_write_complete_chunk(png_ptr, png_cHRM, buf, (png_size_t)32); - } + png_write_complete_chunk(png_ptr, png_cHRM, buf, 32); } #endif #ifdef PNG_WRITE_tRNS_SUPPORTED /* Write the tRNS chunk */ void /* PRIVATE */ -png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, +png_write_tRNS(png_structrp png_ptr, png_const_bytep trans_alpha, png_const_color_16p tran, int num_trans, int color_type) { png_byte buf[6]; @@ -1417,9 +1493,9 @@ #ifdef PNG_WRITE_bKGD_SUPPORTED /* Write the background chunk */ void /* PRIVATE */ -png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) +png_write_bKGD(png_structrp png_ptr, png_const_color_16p back, int color_type) { png_byte buf[6]; png_debug(1, "in png_write_bKGD"); @@ -1479,9 +1555,9 @@ #ifdef PNG_WRITE_hIST_SUPPORTED /* Write the histogram */ void /* PRIVATE */ -png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist) +png_write_hIST(png_structrp png_ptr, png_const_uint_16p hist, int num_hist) { int i; png_byte buf[3]; @@ -1507,236 +1583,97 @@ png_write_chunk_end(png_ptr); } #endif -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ - defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) -/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, - * and if invalid, correct the keyword rather than discarding the entire - * chunk. The PNG 1.0 specification requires keywords 1-79 characters in - * length, forbids leading or trailing whitespace, multiple internal spaces, - * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. - * - * The new_key is allocated to hold the corrected keyword and must be freed - * by the calling routine. This avoids problems with trying to write to - * static keywords without having to have duplicate copies of the strings. - */ -png_size_t /* PRIVATE */ -png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key) -{ - png_size_t key_len; - png_const_charp ikp; - png_charp kp, dp; - int kflag; - int kwarn=0; - - png_debug(1, "in png_check_keyword"); - - *new_key = NULL; - - if (key == NULL || (key_len = png_strlen(key)) == 0) - { - png_warning(png_ptr, "zero length keyword"); - return ((png_size_t)0); - } - - png_debug1(2, "Keyword to be checked is '%s'", key); - - *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2)); - - if (*new_key == NULL) - { - png_warning(png_ptr, "Out of memory while procesing keyword"); - return ((png_size_t)0); - } - - /* Replace non-printing characters with a blank and print a warning */ - for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++) - { - if ((png_byte)*ikp < 0x20 || - ((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1)) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_02x, - (png_byte)*ikp); - png_formatted_warning(png_ptr, p, "invalid keyword character 0x@1"); - *dp = ' '; - } - - else - { - *dp = *ikp; - } - } - *dp = '\0'; - - /* Remove any trailing white space. */ - kp = *new_key + key_len - 1; - if (*kp == ' ') - { - png_warning(png_ptr, "trailing spaces removed from keyword"); - - while (*kp == ' ') - { - *(kp--) = '\0'; - key_len--; - } - } - - /* Remove any leading white space. */ - kp = *new_key; - if (*kp == ' ') - { - png_warning(png_ptr, "leading spaces removed from keyword"); - - while (*kp == ' ') - { - kp++; - key_len--; - } - } - - png_debug1(2, "Checking for multiple internal spaces in '%s'", kp); - - /* Remove multiple internal spaces. */ - for (kflag = 0, dp = *new_key; *kp != '\0'; kp++) - { - if (*kp == ' ' && kflag == 0) - { - *(dp++) = *kp; - kflag = 1; - } - - else if (*kp == ' ') - { - key_len--; - kwarn = 1; - } - - else - { - *(dp++) = *kp; - kflag = 0; - } - } - *dp = '\0'; - if (kwarn) - png_warning(png_ptr, "extra interior spaces removed from keyword"); - - if (key_len == 0) - { - png_free(png_ptr, *new_key); - png_warning(png_ptr, "Zero length keyword"); - } - - if (key_len > 79) - { - png_warning(png_ptr, "keyword length must be 1 - 79 characters"); - (*new_key)[79] = '\0'; - key_len = 79; - } - - return (key_len); -} -#endif - #ifdef PNG_WRITE_tEXt_SUPPORTED /* Write a tEXt chunk */ void /* PRIVATE */ -png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text, +png_write_tEXt(png_structrp png_ptr, png_const_charp key, png_const_charp text, png_size_t text_len) { - png_size_t key_len; - png_charp new_key; + png_uint_32 key_len; + png_byte new_key[80]; png_debug(1, "in png_write_tEXt"); - if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0) - return; + key_len = png_check_keyword(png_ptr, key, new_key); + + if (key_len == 0) + png_error(png_ptr, "tEXt: invalid keyword"); if (text == NULL || *text == '\0') text_len = 0; else text_len = png_strlen(text); + if (text_len > PNG_UINT_31_MAX - (key_len+1)) + png_error(png_ptr, "tEXt: text too long"); + /* Make sure we include the 0 after the key */ png_write_chunk_header(png_ptr, png_tEXt, - (png_uint_32)(key_len + text_len + 1)); + (png_uint_32)/*checked above*/(key_len + text_len + 1)); /* * We leave it to the application to meet PNG-1.0 requirements on the * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, - (png_size_t)(key_len + 1)); + png_write_chunk_data(png_ptr, new_key, key_len + 1); if (text_len) - png_write_chunk_data(png_ptr, (png_const_bytep)text, - (png_size_t)text_len); + png_write_chunk_data(png_ptr, (png_const_bytep)text, text_len); png_write_chunk_end(png_ptr); - png_free(png_ptr, new_key); } #endif #ifdef PNG_WRITE_zTXt_SUPPORTED /* Write a compressed text chunk */ void /* PRIVATE */ -png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text, +png_write_zTXt(png_structrp png_ptr, png_const_charp key, png_const_charp text, png_size_t text_len, int compression) { - png_size_t key_len; - png_byte buf; - png_charp new_key; + png_uint_32 key_len; + png_byte new_key[81]; compression_state comp; png_debug(1, "in png_write_zTXt"); + PNG_UNUSED(text_len); /* Always use strlen */ - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; - comp.input_len = 0; - - if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0) + if (compression == PNG_TEXT_COMPRESSION_NONE) { - png_free(png_ptr, new_key); + png_write_tEXt(png_ptr, key, text, 0); return; } - if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE) - { - png_write_tEXt(png_ptr, new_key, text, (png_size_t)0); - png_free(png_ptr, new_key); - return; - } + if (compression != PNG_TEXT_COMPRESSION_zTXt) + png_error(png_ptr, "zTXt: invalid compression type"); - text_len = png_strlen(text); + key_len = png_check_keyword(png_ptr, key, new_key); - /* Compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression, - &comp); + if (key_len == 0) + png_error(png_ptr, "zTXt: invalid keyword"); - /* Write start of chunk */ - png_write_chunk_header(png_ptr, png_zTXt, - (png_uint_32)(key_len+text_len + 2)); + /* Add the compression method and 1 for the keyword separator. */ + new_key[++key_len] = PNG_COMPRESSION_TYPE_BASE; + ++key_len; - /* Write key */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, - (png_size_t)(key_len + 1)); + /* Compute the compressed data; do it now for the length */ + png_text_compress_init(&comp, (png_const_bytep)text, + text == NULL ? 0 : strlen(text)); - png_free(png_ptr, new_key); + if (png_text_compress(png_ptr, png_zTXt, &comp, key_len) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); - buf = (png_byte)compression; + /* Write start of chunk */ + png_write_chunk_header(png_ptr, png_zTXt, key_len + comp.output_len); - /* Write compression */ - png_write_chunk_data(png_ptr, &buf, (png_size_t)1); + /* Write key */ + png_write_chunk_data(png_ptr, new_key, key_len); /* Write the compressed data */ - png_write_compressed_data_out(png_ptr, &comp, text_len); + png_write_compressed_data_out(png_ptr, &comp); /* Close the chunk */ png_write_chunk_end(png_ptr); } @@ -1744,102 +1681,106 @@ #ifdef PNG_WRITE_iTXt_SUPPORTED /* Write an iTXt chunk */ void /* PRIVATE */ -png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key, +png_write_iTXt(png_structrp png_ptr, int compression, png_const_charp key, png_const_charp lang, png_const_charp lang_key, png_const_charp text) { - png_size_t lang_len, key_len, lang_key_len, text_len; - png_charp new_lang; - png_charp new_key = NULL; - png_byte cbuf[2]; + png_uint_32 key_len, prefix_len; + png_size_t lang_len, lang_key_len; + png_byte new_key[82]; compression_state comp; png_debug(1, "in png_write_iTXt"); - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; + key_len = png_check_keyword(png_ptr, key, new_key); - if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0) - return; + if (key_len == 0) + png_error(png_ptr, "iTXt: invalid keyword"); - if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang)) == 0) + /* Set the compression flag */ + switch (compression) { - png_warning(png_ptr, "Empty language field in iTXt chunk"); - new_lang = NULL; - lang_len = 0; - } - - if (lang_key == NULL) - lang_key_len = 0; - - else - lang_key_len = png_strlen(lang_key); - - if (text == NULL) - text_len = 0; - - else - text_len = png_strlen(text); - - /* Compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression - 2, - &comp); + case PNG_ITXT_COMPRESSION_NONE: + case PNG_TEXT_COMPRESSION_NONE: + compression = new_key[++key_len] = 0; /* no compression */ + break; + case PNG_TEXT_COMPRESSION_zTXt: + case PNG_ITXT_COMPRESSION_zTXt: + compression = new_key[++key_len] = 1; /* compressed */ + break; - /* Make sure we include the compression flag, the compression byte, - * and the NULs after the key, lang, and lang_key parts - */ + default: + png_error(png_ptr, "iTXt: invalid compression"); + } - png_write_chunk_header(png_ptr, png_iTXt, (png_uint_32)( - 5 /* comp byte, comp flag, terminators for key, lang and lang_key */ - + key_len - + lang_len - + lang_key_len - + text_len)); + new_key[++key_len] = PNG_COMPRESSION_TYPE_BASE; + ++key_len; /* for the keywod separator */ /* We leave it to the application to meet PNG-1.0 requirements on the * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of - * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. + * any non-Latin-1 characters except for NEWLINE. ISO PNG, however, + * specifies that the text is UTF-8 and this really doesn't require any + * checking. + * * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. + * + * TODO: validate the language tag correctly (see the spec.) */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, (png_size_t)(key_len + 1)); + if (lang == NULL) lang = ""; /* empty language is valid */ + lang_len = strlen(lang)+1; + if (lang_key == NULL) lang_key = ""; /* may be empty */ + lang_key_len = strlen(lang_key)+1; + if (text == NULL) text = ""; /* may be empty */ - /* Set the compression flag */ - if (compression == PNG_ITXT_COMPRESSION_NONE || - compression == PNG_TEXT_COMPRESSION_NONE) - cbuf[0] = 0; + prefix_len = key_len; + if (lang_len > PNG_UINT_31_MAX-prefix_len) + prefix_len = PNG_UINT_31_MAX; + else + prefix_len = (png_uint_32)(prefix_len + lang_len); - else /* compression == PNG_ITXT_COMPRESSION_zTXt */ - cbuf[0] = 1; + if (lang_key_len > PNG_UINT_31_MAX-prefix_len) + prefix_len = PNG_UINT_31_MAX; + else + prefix_len = (png_uint_32)(prefix_len + lang_key_len); - /* Set the compression method */ - cbuf[1] = 0; + png_text_compress_init(&comp, (png_const_bytep)text, strlen(text)); - png_write_chunk_data(png_ptr, cbuf, (png_size_t)2); + if (compression) + { + if (png_text_compress(png_ptr, png_iTXt, &comp, prefix_len) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); + } - cbuf[0] = 0; - png_write_chunk_data(png_ptr, (new_lang ? (png_const_bytep)new_lang : cbuf), - (png_size_t)(lang_len + 1)); + else + { + if (comp.input_len > PNG_UINT_31_MAX-prefix_len) + png_error(png_ptr, "iTXt: uncompressed text too long"); + } - png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf), - (png_size_t)(lang_key_len + 1)); + png_write_chunk_header(png_ptr, png_iTXt, comp.output_len + prefix_len); - png_write_compressed_data_out(png_ptr, &comp, text_len); + png_write_chunk_data(png_ptr, new_key, key_len); - png_write_chunk_end(png_ptr); + png_write_chunk_data(png_ptr, (png_const_bytep)lang, lang_len); - png_free(png_ptr, new_key); - png_free(png_ptr, new_lang); + png_write_chunk_data(png_ptr, (png_const_bytep)lang_key, lang_key_len); + + if (compression) + png_write_compressed_data_out(png_ptr, &comp); + + else + png_write_chunk_data(png_ptr, (png_const_bytep)text, comp.input_len); + + png_write_chunk_end(png_ptr); } #endif #ifdef PNG_WRITE_oFFs_SUPPORTED /* Write the oFFs chunk */ void /* PRIVATE */ -png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, +png_write_oFFs(png_structrp png_ptr, png_int_32 x_offset, png_int_32 y_offset, int unit_type) { png_byte buf[9]; @@ -1857,24 +1798,31 @@ #endif #ifdef PNG_WRITE_pCAL_SUPPORTED /* Write the pCAL chunk (described in the PNG extensions document) */ void /* PRIVATE */ -png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, +png_write_pCAL(png_structrp png_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_const_charp units, png_charpp params) { - png_size_t purpose_len, units_len, total_len; + png_uint_32 purpose_len; + png_size_t units_len, total_len; png_size_tp params_len; png_byte buf[10]; - png_charp new_purpose; + png_byte new_purpose[80]; int i; png_debug1(1, "in png_write_pCAL (%d parameters)", nparams); if (type >= PNG_EQUATION_LAST) - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); + png_error(png_ptr, "Unrecognized equation type for pCAL chunk"); + + purpose_len = png_check_keyword(png_ptr, purpose, new_purpose); + + if (purpose_len == 0) + png_error(png_ptr, "pCAL: invalid keyword"); + + ++purpose_len; /* terminator */ - purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1; png_debug1(3, "pCAL purpose length = %d", (int)purpose_len); units_len = png_strlen(units) + (nparams == 0 ? 0 : 1); png_debug1(3, "pCAL units length = %d", (int)units_len); total_len = purpose_len + units_len + 10; @@ -1894,18 +1842,16 @@ } png_debug1(3, "pCAL total length = %d", (int)total_len); png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len); - png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose, purpose_len); + png_write_chunk_data(png_ptr, new_purpose, purpose_len); png_save_int_32(buf, X0); png_save_int_32(buf + 4, X1); buf[8] = (png_byte)type; buf[9] = (png_byte)nparams; png_write_chunk_data(png_ptr, buf, (png_size_t)10); png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len); - png_free(png_ptr, new_purpose); - for (i = 0; i < nparams; i++) { png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]); } @@ -1917,9 +1863,9 @@ #ifdef PNG_WRITE_sCAL_SUPPORTED /* Write the sCAL chunk */ void /* PRIVATE */ -png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width, +png_write_sCAL_s(png_structrp png_ptr, int unit, png_const_charp width, png_const_charp height) { png_byte buf[64]; png_size_t wlen, hlen, total_len; @@ -1947,9 +1893,9 @@ #ifdef PNG_WRITE_pHYs_SUPPORTED /* Write the pHYs chunk */ void /* PRIVATE */ -png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, +png_write_pHYs(png_structrp png_ptr, png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, int unit_type) { png_byte buf[9]; @@ -1971,9 +1917,9 @@ /* Write the tIME chunk. Use either png_convert_from_struct_tm() * or png_convert_from_time_t(), or fill in the structure yourself. */ void /* PRIVATE */ -png_write_tIME(png_structp png_ptr, png_const_timep mod_time) +png_write_tIME(png_structrp png_ptr, png_const_timep mod_time) { png_byte buf[7]; png_debug(1, "in png_write_tIME"); @@ -1998,9 +1944,9 @@ #endif /* Initializes the row writing capability of libpng */ void /* PRIVATE */ -png_write_start_row(png_structp png_ptr) +png_write_start_row(png_structrp png_ptr) { #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ @@ -2100,17 +2046,13 @@ { png_ptr->num_rows = png_ptr->height; png_ptr->usr_width = png_ptr->width; } - - png_zlib_claim(png_ptr, PNG_ZLIB_FOR_IDAT); - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; } /* Internal use only. Called when finished processing a row of data. */ void /* PRIVATE */ -png_write_finish_row(png_structp png_ptr) +png_write_finish_row(png_structrp png_ptr) { #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ @@ -2126,10 +2068,8 @@ /* Offset to next interlace block in the y direction */ static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; #endif - int ret; - png_debug(1, "in png_write_finish_row"); /* Next row */ png_ptr->row_number++; @@ -2189,44 +2129,9 @@ #endif /* If we get here, we've just written the last row, so we need to flush the compressor */ - do - { - /* Tell the compressor we are done */ - ret = deflate(&png_ptr->zstream, Z_FINISH); - - /* Check for an error */ - if (ret == Z_OK) - { - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - } - - else if (ret != Z_STREAM_END) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - } while (ret != Z_STREAM_END); - - /* Write any extra space */ - if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) - { - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size - - png_ptr->zstream.avail_out); - } - - png_zlib_release(png_ptr); - png_ptr->zstream.data_type = Z_BINARY; + png_compress_IDAT(png_ptr, NULL, 0, Z_FINISH); } #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Pick out the correct pixels for the interlace pass. @@ -2412,17 +2317,17 @@ /* This filters the row, chooses which filter to use, if it has not already * been specified by the application, and then writes the row out with the * chosen filter. */ -static void png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, +static void png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row, png_size_t row_bytes); #define PNG_MAXSUM (((png_uint_32)(-1)) >> 1) #define PNG_HISHIFT 10 #define PNG_LOMASK ((png_uint_32)0xffffL) #define PNG_HIMASK ((png_uint_32)(~PNG_LOMASK >> PNG_HISHIFT)) void /* PRIVATE */ -png_write_find_filter(png_structp png_ptr, png_row_infop row_info) +png_write_find_filter(png_structrp png_ptr, png_row_infop row_info) { png_bytep best_row; #ifdef PNG_WRITE_FILTER_SUPPORTED png_bytep prev_row, row_buf; @@ -3091,68 +2996,16 @@ /* Do the actual writing of a previously filtered row. */ static void -png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, - png_size_t avail/*includes filter byte*/) +png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row, + png_size_t full_row_length/*includes filter byte*/) { png_debug(1, "in png_write_filtered_row"); png_debug1(2, "filter = %d", filtered_row[0]); - /* Set up the zlib input buffer */ - - png_ptr->zstream.next_in = filtered_row; - png_ptr->zstream.avail_in = 0; - /* Repeat until we have compressed all the data */ - do - { - int ret; /* Return of zlib */ - - /* Record the number of bytes available - zlib supports at least 65535 - * bytes at one step, depending on the size of the zlib type 'uInt', the - * maximum size zlib can write at once is ZLIB_IO_MAX (from pngpriv.h). - * Use this because on 16 bit systems 'rowbytes' can be up to 65536 (i.e. - * one more than 16 bits) and, in this case 'rowbytes+1' can overflow a - * uInt. ZLIB_IO_MAX can be safely reduced to cause zlib to be called - * with smaller chunks of data. - */ - if (png_ptr->zstream.avail_in == 0) - { - if (avail > ZLIB_IO_MAX) - { - png_ptr->zstream.avail_in = ZLIB_IO_MAX; - avail -= ZLIB_IO_MAX; - } - else - { - /* So this will fit in the available uInt space: */ - png_ptr->zstream.avail_in = (uInt)avail; - avail = 0; - } - } - - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); - - /* Check for compression errors */ - if (ret != Z_OK) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - - /* See if it is time to write another IDAT */ - if (!(png_ptr->zstream.avail_out)) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - } - /* Repeat until all data has been compressed */ - } while (avail > 0 || png_ptr->zstream.avail_in > 0); + png_compress_IDAT(png_ptr, filtered_row, full_row_length, Z_NO_FLUSH); /* Swap the current and previous rows */ if (png_ptr->prev_row != NULL) { diff -ru4NwbB libpng-1.5.10/projects/owatcom/libpng.wpj libpng-1.6.0beta22/projects/owatcom/libpng.wpj --- libpng-1.5.10/projects/owatcom/libpng.wpj 2011-12-03 19:57:08.558182000 -0600 +++ libpng-1.6.0beta22/projects/owatcom/libpng.wpj 2011-12-03 20:19:19.000000000 -0600 @@ -6,9 +6,9 @@ WRect 256 0 8960 -9284 +9294 2 MProject 3 MCommand @@ -24,9 +24,9 @@ 4 MCommand 19 @type pngconfig.inf -3 +4 5 WFileName 10 libpng.tgt @@ -38,55 +38,75 @@ WFileName 12 pngvalid.tgt 8 -WVList -3 +WFileName +12 +pngstest.tgt 9 -VComponent +WVList +4 10 +VComponent +11 WRect 0 0 -5632 -4164 +5638 +4174 0 0 -11 +12 WFileName 10 libpng.tgt 0 0 -12 -VComponent 13 +VComponent +14 WRect 1280 -1540 -5632 -4164 +1550 +5638 +4174 0 0 -14 +15 WFileName 11 pngtest.tgt 0 1 -15 -VComponent 16 +VComponent +17 WRect -518 -487 -5632 -4164 +524 +497 +5638 +4174 0 0 -17 +18 WFileName 12 pngvalid.tgt 0 1 -9 +19 +VComponent +20 +WRect +2054 +2701 +5674 +4232 +0 +0 +21 +WFileName +12 +pngstest.tgt +0 +1 +19 diff -ru4NwbB libpng-1.5.10/projects/owatcom/pngstest.tgt libpng-1.6.0beta22/projects/owatcom/pngstest.tgt --- libpng-1.5.10/projects/owatcom/pngstest.tgt 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/projects/owatcom/pngstest.tgt 2012-03-18 22:26:24.787392000 -0500 @@ -0,0 +1,219 @@ +40 +targetIdent +0 +MProject +1 +MComponent +0 +2 +WString +4 +NEXE +3 +WString +5 +nc2en +1 +0 +0 +4 +MCommand +0 +5 +MCommand +1118 +pngstest --strict --log ../../contrib/pngsuite/basn0g01.png ../../contrib/pngsuite/basn0g02.png ../../contrib/pngsuite/basn0g04.png ../../contrib/pngsuite/basn0g08.png ../../contrib/pngsuite/basn0g16.png ../../contrib/pngsuite/basn2c08.png ../../contrib/pngsuite/basn2c16.png ../../contrib/pngsuite/basn3p01.png ../../contrib/pngsuite/basn3p02.png ../../contrib/pngsuite/basn3p04.png ../../contrib/pngsuite/basn3p08.png ../../contrib/pngsuite/basn4a08.png ../../contrib/pngsuite/basn4a16.png ../../contrib/pngsuite/basn6a08.png ../../contrib/pngsuite/basn6a16.png ../../contrib/pngsuite/ftbbn0g04.png ../../contrib/pngsuite/ftbbn0g01.png ../../contrib/pngsuite/ftbbn0g02.png ../../contrib/pngsuite/ftbbn2c16.png ../../contrib/pngsuite/ftbbn3p08.png ../../contrib/pngsuite/ftbgn2c16.png ../../contrib/pngsuite/ftbgn3p08.png ../../contrib/pngsuite/ftbrn2c08.png ../../contrib/pngsuite/ftbwn0g16.png ../../contrib/pngsuite/ftbwn3p08.png ../../contrib/pngsuite/ftbyn3p08.png ../../contrib/pngsuite/ftp0n0g08.png ../../contrib/pngsuite/ftp0n2c08.png ../../contrib/pngsuite/ftp0n3p08.png ../../contrib/pngsuite/ftp1n3p08.png +6 +MItem +12 +pngstest.exe +7 +WString +4 +NEXE +8 +WVList +6 +9 +MVState +10 +WString +7 +WINLINK +11 +WString +11 +?????Stack: +1 +12 +WString +4 +768k +0 +13 +MVState +14 +WString +7 +WINLINK +15 +WString +28 +?????Library directories(;): +1 +16 +WString +8 +$(%zlib) +0 +17 +MVState +18 +WString +7 +WINLINK +19 +WString +18 +?????Libraries(,): +1 +20 +WString +19 +libpng.lib zlib.lib +0 +21 +MVState +22 +WString +7 +WINLINK +23 +WString +11 +?????Stack: +0 +24 +WString +4 +768k +0 +25 +MVState +26 +WString +7 +WINLINK +27 +WString +28 +?????Library directories(;): +0 +28 +WString +8 +$(%zlib) +0 +29 +MVState +30 +WString +7 +WINLINK +31 +WString +18 +?????Libraries(,): +0 +32 +WString +19 +libpng.lib zlib.lib +0 +33 +WVList +1 +34 +ActionStates +35 +WString +4 +&Run +36 +WVList +0 +-1 +1 +1 +0 +37 +WPickList +2 +38 +MItem +3 +*.c +39 +WString +4 +COBJ +40 +WVList +2 +41 +MVState +42 +WString +3 +WCC +43 +WString +25 +n????Include directories: +1 +44 +WString +39 +"$(%zlib);$(%watcom)/h;$(%watcom)/h/nt" +0 +45 +MVState +46 +WString +3 +WCC +47 +WString +25 +n????Include directories: +0 +48 +WString +39 +"$(%zlib);$(%watcom)/h;$(%watcom)/h/nt" +0 +49 +WVList +0 +-1 +1 +1 +0 +50 +MItem +33 +..\..\contrib\libtests\pngstest.c +51 +WString +4 +COBJ +52 +WVList +0 +53 +WVList +0 +38 +1 +1 +0 diff -ru4NwbB libpng-1.5.10/projects/visualc71/README.txt libpng-1.6.0beta22/projects/visualc71/README.txt --- libpng-1.5.10/projects/visualc71/README.txt 2010-08-26 15:07:32.000000000 -0500 +++ libpng-1.6.0beta22/projects/visualc71/README.txt 2011-11-26 18:08:14.000000000 -0600 @@ -36,11 +36,11 @@ 6) Select "Build | Build Solution (Ctrl-Shift-B)" This project builds the libpng binaries as follows: -* Win32_DLL_Release\libpng15.dll DLL build -* Win32_DLL_Debug\libpng15d.dll DLL build (debug version) -* Win32_DLL_VB\libpng15vb.dll DLL build for Visual Basic, using stdcall +* Win32_DLL_Release\libpng16.dll DLL build +* Win32_DLL_Debug\libpng16d.dll DLL build (debug version) +* Win32_DLL_VB\libpng16vb.dll DLL build for Visual Basic, using stdcall * Win32_LIB_Release\libpng.lib static build * Win32_LIB_Debug\libpngd.lib static build (debug version) Notes: diff -ru4NwbB libpng-1.5.10/projects/vstudio/libpng/libpng.vcxproj libpng-1.6.0beta22/projects/vstudio/libpng/libpng.vcxproj --- libpng-1.5.10/projects/vstudio/libpng/libpng.vcxproj 2012-03-29 00:06:56.868162840 -0500 +++ libpng-1.6.0beta22/projects/vstudio/libpng/libpng.vcxproj 2012-05-23 12:30:58.677372850 -0500 @@ -62,25 +62,25 @@ false - $(ProjectName)15 + $(ProjectName)16 false - $(ProjectName)15 + $(ProjectName)16 false - $(ProjectName)15 + $(ProjectName)16 false - $(ProjectName)15 + $(ProjectName)16 Use @@ -105,9 +105,9 @@ Windows true zlib.lib - 15 + 16 $(OutDir) @@ -162,9 +162,9 @@ true true true zlib.lib - 15 + 16 $(OutDir) diff -ru4NwbB libpng-1.5.10/projects/vstudio/pngstest/pngstest.vcxproj libpng-1.6.0beta22/projects/vstudio/pngstest/pngstest.vcxproj --- libpng-1.5.10/projects/vstudio/pngstest/pngstest.vcxproj 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/projects/vstudio/pngstest/pngstest.vcxproj 2012-03-18 22:22:30.732420000 -0500 @@ -0,0 +1,218 @@ + + + + + Debug Library + Win32 + + + Debug + Win32 + + + Release Library + Win32 + + + Release + Win32 + + + + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8} + Win32Proj + pngstest + + + + + Application + Unicode + + + Application + Unicode + + + Application + Unicode + + + Application + Unicode + + + + + + + + + + + + + + + + + + + false + + + + false + + + + false + + + + false + + + + + NotUsing + Level4 + false + ProgramDatabase + Disabled + EnableFastChecks + WIN32;_DEBUG;_CONSOLE;PNG_USE_DLL;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996;4127 + false + true + true + true + false + true + false + + + Console + true + libpng16.lib;zlib.lib + $(OutDir) + + + Executing libpng simplified API test program + "$(OutDir)pngstest.exe" --strict --log --touch "$(IntDir)pngstest.out" ../../../contrib/pngsuite/basn0g01.png ../../../contrib/pngsuite/basn0g02.png ../../../contrib/pngsuite/basn0g04.png ../../../contrib/pngsuite/basn0g08.png ../../../contrib/pngsuite/basn0g16.png ../../../contrib/pngsuite/basn2c08.png ../../../contrib/pngsuite/basn2c16.png ../../../contrib/pngsuite/basn3p01.png ../../../contrib/pngsuite/basn3p02.png ../../../contrib/pngsuite/basn3p04.png ../../../contrib/pngsuite/basn3p08.png ../../../contrib/pngsuite/basn4a08.png ../../../contrib/pngsuite/basn4a16.png ../../../contrib/pngsuite/basn6a08.png ../../../contrib/pngsuite/basn6a16.png ../../../contrib/pngsuite/ftbbn0g01.png ../../../contrib/pngsuite/ftbbn0g02.png ../../../contrib/pngsuite/ftbbn0g04.png ../../../contrib/pngsuite/ftbbn2c16.png ../../../contrib/pngsuite/ftbbn3p08.png ../../../contrib/pngsuite/ftbgn2c16.png ../../../contrib/pngsuite/ftbgn3p08.png ../../../contrib/pngsuite/ftbrn2c08.png ../../../contrib/pngsuite/ftbwn0g16.png ../../../contrib/pngsuite/ftbwn3p08.png ../../../contrib/pngsuite/ftbyn3p08.png ../../../contrib/pngsuite/ftp0n0g08.png ../../../contrib/pngsuite/ftp0n2c08.png ../../../contrib/pngsuite/ftp0n3p08.png ../../../contrib/pngsuite/ftp1n3p08.png + $(IntDir)pngstest.out + $(OutDir)pngstest.exe + + + + + NotUsing + Level4 + false + ProgramDatabase + Disabled + EnableFastChecks + MultiThreadedDebug + WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996;4127 + false + true + true + true + false + true + false + + + Console + true + libpng16.lib;zlib.lib + $(OutDir) + + + Executing libpng simplified API test program + "$(OutDir)pngstest.exe" --strict --log --touch "$(IntDir)pngstest.out" ../../../contrib/pngsuite/basn0g01.png ../../../contrib/pngsuite/basn0g02.png ../../../contrib/pngsuite/basn0g04.png ../../../contrib/pngsuite/basn0g08.png ../../../contrib/pngsuite/basn0g16.png ../../../contrib/pngsuite/basn2c08.png ../../../contrib/pngsuite/basn2c16.png ../../../contrib/pngsuite/basn3p01.png ../../../contrib/pngsuite/basn3p02.png ../../../contrib/pngsuite/basn3p04.png ../../../contrib/pngsuite/basn3p08.png ../../../contrib/pngsuite/basn4a08.png ../../../contrib/pngsuite/basn4a16.png ../../../contrib/pngsuite/basn6a08.png ../../../contrib/pngsuite/basn6a16.png ../../../contrib/pngsuite/ftbbn0g01.png ../../../contrib/pngsuite/ftbbn0g02.png ../../../contrib/pngsuite/ftbbn0g04.png ../../../contrib/pngsuite/ftbbn2c16.png ../../../contrib/pngsuite/ftbbn3p08.png ../../../contrib/pngsuite/ftbgn2c16.png ../../../contrib/pngsuite/ftbgn3p08.png ../../../contrib/pngsuite/ftbrn2c08.png ../../../contrib/pngsuite/ftbwn0g16.png ../../../contrib/pngsuite/ftbwn3p08.png ../../../contrib/pngsuite/ftbyn3p08.png ../../../contrib/pngsuite/ftp0n0g08.png ../../../contrib/pngsuite/ftp0n2c08.png ../../../contrib/pngsuite/ftp0n3p08.png ../../../contrib/pngsuite/ftp1n3p08.png + $(IntDir)pngstest.out + $(OutDir)pngstest.exe + + + + + Level4 + NotUsing + ProgramDatabase + Full + false + true + WIN32;NDEBUG;_CONSOLE;PNG_USE_DLL;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996;4127 + false + true + true + false + true + true + false + + + Console + true + true + true + libpng16.lib;zlib.lib + $(OutDir) + UseLinkTimeCodeGeneration + + + Executing libpng simplified API test program + "$(OutDir)pngstest.exe" --strict --log --touch "$(IntDir)pngstest.out" ../../../contrib/pngsuite/basn0g01.png ../../../contrib/pngsuite/basn0g02.png ../../../contrib/pngsuite/basn0g04.png ../../../contrib/pngsuite/basn0g08.png ../../../contrib/pngsuite/basn0g16.png ../../../contrib/pngsuite/basn2c08.png ../../../contrib/pngsuite/basn2c16.png ../../../contrib/pngsuite/basn3p01.png ../../../contrib/pngsuite/basn3p02.png ../../../contrib/pngsuite/basn3p04.png ../../../contrib/pngsuite/basn3p08.png ../../../contrib/pngsuite/basn4a08.png ../../../contrib/pngsuite/basn4a16.png ../../../contrib/pngsuite/basn6a08.png ../../../contrib/pngsuite/basn6a16.png ../../../contrib/pngsuite/ftbbn0g01.png ../../../contrib/pngsuite/ftbbn0g02.png ../../../contrib/pngsuite/ftbbn0g04.png ../../../contrib/pngsuite/ftbbn2c16.png ../../../contrib/pngsuite/ftbbn3p08.png ../../../contrib/pngsuite/ftbgn2c16.png ../../../contrib/pngsuite/ftbgn3p08.png ../../../contrib/pngsuite/ftbrn2c08.png ../../../contrib/pngsuite/ftbwn0g16.png ../../../contrib/pngsuite/ftbwn3p08.png ../../../contrib/pngsuite/ftbyn3p08.png ../../../contrib/pngsuite/ftp0n0g08.png ../../../contrib/pngsuite/ftp0n2c08.png ../../../contrib/pngsuite/ftp0n3p08.png ../../../contrib/pngsuite/ftp1n3p08.png + $(IntDir)pngstest.out + $(OutDir)pngstest.exe + + + + + Level4 + NotUsing + ProgramDatabase + Full + MultiThreaded + false + true + WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996;4127 + false + true + true + false + true + true + false + + + Console + true + true + true + libpng16.lib;zlib.lib + $(OutDir) + UseLinkTimeCodeGeneration + + + Executing libpng simplified API test program + "$(OutDir)pngstest.exe" --strict --log --touch "$(IntDir)pngstest.out" ../../../contrib/pngsuite/basn0g01.png ../../../contrib/pngsuite/basn0g02.png ../../../contrib/pngsuite/basn0g04.png ../../../contrib/pngsuite/basn0g08.png ../../../contrib/pngsuite/basn0g16.png ../../../contrib/pngsuite/basn2c08.png ../../../contrib/pngsuite/basn2c16.png ../../../contrib/pngsuite/basn3p01.png ../../../contrib/pngsuite/basn3p02.png ../../../contrib/pngsuite/basn3p04.png ../../../contrib/pngsuite/basn3p08.png ../../../contrib/pngsuite/basn4a08.png ../../../contrib/pngsuite/basn4a16.png ../../../contrib/pngsuite/basn6a08.png ../../../contrib/pngsuite/basn6a16.png ../../../contrib/pngsuite/ftbbn0g01.png ../../../contrib/pngsuite/ftbbn0g02.png ../../../contrib/pngsuite/ftbbn0g04.png ../../../contrib/pngsuite/ftbbn2c16.png ../../../contrib/pngsuite/ftbbn3p08.png ../../../contrib/pngsuite/ftbgn2c16.png ../../../contrib/pngsuite/ftbgn3p08.png ../../../contrib/pngsuite/ftbrn2c08.png ../../../contrib/pngsuite/ftbwn0g16.png ../../../contrib/pngsuite/ftbwn3p08.png ../../../contrib/pngsuite/ftbyn3p08.png ../../../contrib/pngsuite/ftp0n0g08.png ../../../contrib/pngsuite/ftp0n2c08.png ../../../contrib/pngsuite/ftp0n3p08.png ../../../contrib/pngsuite/ftp1n3p08.png + $(IntDir)pngstest.out + $(OutDir)pngstest.exe + + + + + + + + + diff -ru4NwbB libpng-1.5.10/projects/vstudio/pngtest/pngtest.vcxproj libpng-1.6.0beta22/projects/vstudio/pngtest/pngtest.vcxproj --- libpng-1.5.10/projects/vstudio/pngtest/pngtest.vcxproj 2012-03-29 00:06:56.879114196 -0500 +++ libpng-1.6.0beta22/projects/vstudio/pngtest/pngtest.vcxproj 2012-05-23 12:30:58.688326495 -0500 @@ -94,9 +94,9 @@ Console true - libpng15.lib + libpng16.lib $(OutDir) Executing PNG test program @@ -127,9 +127,9 @@ Console true - libpng15.lib;zlib.lib + libpng16.lib;zlib.lib $(OutDir) Executing PNG test program @@ -162,9 +162,9 @@ true true true UseLinkTimeCodeGeneration - libpng15.lib + libpng16.lib $(OutDir) Executing PNG test program @@ -197,9 +197,9 @@ Console true true true - libpng15.lib;zlib.lib + libpng16.lib;zlib.lib UseLinkTimeCodeGeneration $(OutDir) diff -ru4NwbB libpng-1.5.10/projects/vstudio/pngvalid/pngvalid.vcxproj libpng-1.6.0beta22/projects/vstudio/pngvalid/pngvalid.vcxproj --- libpng-1.5.10/projects/vstudio/pngvalid/pngvalid.vcxproj 2012-03-29 00:06:56.890137387 -0500 +++ libpng-1.6.0beta22/projects/vstudio/pngvalid/pngvalid.vcxproj 2012-05-23 12:30:58.699070951 -0500 @@ -94,9 +94,9 @@ Console true - libpng15.lib;zlib.lib + libpng16.lib;zlib.lib $(OutDir) Executing PNG validation program @@ -127,9 +127,9 @@ Console true - libpng15.lib;zlib.lib + libpng16.lib;zlib.lib $(OutDir) Executing PNG validation program @@ -161,9 +161,9 @@ Console true true true - libpng15.lib;zlib.lib + libpng16.lib;zlib.lib $(OutDir) UseLinkTimeCodeGeneration @@ -197,9 +197,9 @@ Console true true true - libpng15.lib;zlib.lib + libpng16.lib;zlib.lib $(OutDir) UseLinkTimeCodeGeneration diff -ru4NwbB libpng-1.5.10/projects/vstudio/readme.txt libpng-1.6.0beta22/projects/vstudio/readme.txt --- libpng-1.5.10/projects/vstudio/readme.txt 2012-03-29 00:06:56.848316817 -0500 +++ libpng-1.6.0beta22/projects/vstudio/readme.txt 2012-05-23 12:30:58.657276062 -0500 @@ -39,9 +39,9 @@ problems. If you don't use the Visual Studio defaults your application must still be built with the default runtime option (/MD). If, for some reason, it is not then your -application will crash inside libpng15.dll as soon as libpng tries to read +application will crash inside libpng16.dll as soon as libpng tries to read from a file handle you pass in. If you do not want to use the DLL, for example for a very small application, the 'release library' configuration may be more appropriate. This is built diff -ru4NwbB libpng-1.5.10/projects/vstudio/vstudio.sln libpng-1.6.0beta22/projects/vstudio/vstudio.sln --- libpng-1.5.10/projects/vstudio/vstudio.sln 2011-11-23 09:00:02.985074000 -0600 +++ libpng-1.6.0beta22/projects/vstudio/vstudio.sln 2011-11-16 11:53:54.000000000 -0600 @@ -23,8 +23,15 @@ EndProjectSection EndProject Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pnglibconf", "pnglibconf\pnglibconf.vcxproj", "{EB33566E-DA7F-4D28-9077-88C0B7C77E35}" EndProject +Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pngstest", "pngstest\pngstest.vcxproj", "{277AC57F-313B-4D06-B119-A3CDB672D2FF}" + ProjectSection(ProjectDependencies) = postProject + {60F89955-91C6-3A36-8000-13C592FEC2DF} = {60F89955-91C6-3A36-8000-13C592FEC2DF} + {EB33566E-DA7F-4D28-9077-88C0B7C77E35} = {EB33566E-DA7F-4D28-9077-88C0B7C77E35} + {D6973076-9317-4EF2-A0B8-B7A18AC0713E} = {D6973076-9317-4EF2-A0B8-B7A18AC0713E} + EndProjectSection +EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution Debug Library|Win32 = Debug Library|Win32 Debug|Win32 = Debug|Win32 diff -ru4NwbB libpng-1.5.10/projects/vstudio/zlib/zlib.vcxproj libpng-1.6.0beta22/projects/vstudio/zlib/zlib.vcxproj --- libpng-1.5.10/projects/vstudio/zlib/zlib.vcxproj 2011-08-16 19:34:41.000000000 -0500 +++ libpng-1.6.0beta22/projects/vstudio/zlib/zlib.vcxproj 2012-02-02 08:11:36.000000000 -0600 @@ -83,14 +83,15 @@ true - WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions) + WIN32;_DEBUG;_WINDOWS;Z_SOLO;%(PreprocessorDefinitions) MultiThreadedDebug TurnOffAllWarnings ProgramDatabase Disabled true + true MachineX86 true @@ -98,13 +99,14 @@ - WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions) + WIN32;_DEBUG;_WINDOWS;Z_SOLO;%(PreprocessorDefinitions) TurnOffAllWarnings ProgramDatabase Disabled true + true MachineX86 true @@ -122,8 +124,9 @@ true true true MultiThreaded + WIN32;NDEBUG;_WINDOWS;Z_SOLO;%(PreprocessorDefinitions) MachineX86 true @@ -143,32 +146,21 @@ false true true true + WIN32;NDEBUG;_WINDOWS;Z_SOLO;%(PreprocessorDefinitions) MachineX86 true Windows + true + true true - - - WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions) - Level3 - ProgramDatabase - - - MachineX86 - true - Windows - true - true - - diff -ru4NwbB libpng-1.5.10/scripts/README.txt libpng-1.6.0beta22/scripts/README.txt --- libpng-1.5.10/scripts/README.txt 2012-03-29 00:06:56.395041675 -0500 +++ libpng-1.6.0beta22/scripts/README.txt 2012-05-23 12:30:58.110816356 -0500 @@ -72,6 +72,16 @@ symbols.def => Used for symbol versioning symbols.dfn => Used for symbol versioning vers.dfn => Used for symbol versioning + libtool.m4 => Used by autoconf tools + ltoptions.m4 => Used by autoconf tools + ltsugar.m4 => Used by autoconf tools + ltversion.m4 => Used by autoconf tools + lt~obsolete.m4 => Used by autoconf tools + + intprefix.dfn => Used by autoconf tools + macro.lst => Used by autoconf tools + prefix.dfn => Used by autoconf tools + Further information can be found in comments in the individual makefiles. diff -ru4NwbB libpng-1.5.10/scripts/checksym.awk libpng-1.6.0beta22/scripts/checksym.awk --- libpng-1.5.10/scripts/checksym.awk 2010-12-07 14:33:57.000000000 -0600 +++ libpng-1.6.0beta22/scripts/checksym.awk 2011-12-08 09:08:52.000000000 -0600 @@ -4,10 +4,11 @@ # # awk -f checksym.awk official-def list-to-check # # Output is a file in the current directory called 'symbols.new', -# stdout holds error messages. Error code indicates success or -# failure. +# the value of the awk variable "of" (which can be changed on the +# command line if required.) stdout holds error messages. Error +# code indicates success or failure. # # NOTE: this is a pure, old fashioned, awk script. It will # work with any awk @@ -20,8 +21,9 @@ lasto = 0 # last ordinal value from png.h mastero = 0 # highest ordinal in master file symbolo = 0 # highest ordinal in png.h missing = "error"# log an error on missing symbols + of="symbols.new" # default to a fixed name } # Read existing definitions from the master file (the first # file on the command line.) This must be a def file and it @@ -150,12 +152,12 @@ } # Finally generate symbols.new if (symbol[o] != "") - print " " symbol[o], "@" o > "symbols.new" + print " " symbol[o], "@" o > of } if (err != 0) { - print "*** A new list is in symbols.new ***" + print "*** A new list is in", of, "***" exit 1 } } diff -ru4NwbB libpng-1.5.10/scripts/intprefix.dfn libpng-1.6.0beta22/scripts/intprefix.dfn --- libpng-1.5.10/scripts/intprefix.dfn 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/scripts/intprefix.dfn 2012-01-31 20:27:16.000000000 -0600 @@ -0,0 +1,19 @@ + +/* intprefix.dfn - generate an unprefixed internal symbol list + * + * Last changed in libpng version 1.6.0 [January 30, 2012] + * Copyright (c) 2012 Glenn Randers-Pehrson + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#define PNG_INTERNAL_DATA(type, name, array)\ + PNG_DEFN_MAGIC-name-PNG_DEFN_END + +#define PNG_INTERNAL_FUNCTION(type, name, args, attributes)\ + PNG_DEFN_MAGIC-name-PNG_DEFN_END + +#define PNGPREFIX_H /* self generation */ +#include "../pngpriv.h" diff -ru4NwbB libpng-1.5.10/scripts/libtool.m4 libpng-1.6.0beta22/scripts/libtool.m4 --- libpng-1.5.10/scripts/libtool.m4 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/scripts/libtool.m4 2012-05-23 12:30:58.201006409 -0500 @@ -0,0 +1,7982 @@ +# libtool.m4 - Configure libtool for the host system. -*-Autoconf-*- +# +# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, +# 2006, 2007, 2008, 2009, 2010, 2011 Free Software +# Foundation, Inc. +# Written by Gordon Matzigkeit, 1996 +# +# This file is free software; the Free Software Foundation gives +# unlimited permission to copy and/or distribute it, with or without +# modifications, as long as this notice is preserved. + +m4_define([_LT_COPYING], [dnl +# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, +# 2006, 2007, 2008, 2009, 2010, 2011 Free Software +# Foundation, Inc. +# Written by Gordon Matzigkeit, 1996 +# +# This file is part of GNU Libtool. +# +# GNU Libtool is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. +# +# As a special exception to the GNU General Public License, +# if you distribute this file as part of a program or library that +# is built using GNU Libtool, you may include this file under the +# same distribution terms that you use for the rest of that program. +# +# GNU Libtool is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Libtool; see the file COPYING. If not, a copy +# can be downloaded from http://www.gnu.org/licenses/gpl.html, or +# obtained by writing to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +]) + +# serial 57 LT_INIT + + +# LT_PREREQ(VERSION) +# ------------------ +# Complain and exit if this libtool version is less that VERSION. +m4_defun([LT_PREREQ], +[m4_if(m4_version_compare(m4_defn([LT_PACKAGE_VERSION]), [$1]), -1, + [m4_default([$3], + [m4_fatal([Libtool version $1 or higher is required], + 63)])], + [$2])]) + + +# _LT_CHECK_BUILDDIR +# ------------------ +# Complain if the absolute build directory name contains unusual characters +m4_defun([_LT_CHECK_BUILDDIR], +[case `pwd` in + *\ * | *\ *) + AC_MSG_WARN([Libtool does not cope well with whitespace in `pwd`]) ;; +esac +]) + + +# LT_INIT([OPTIONS]) +# ------------------ +AC_DEFUN([LT_INIT], +[AC_PREREQ([2.58])dnl We use AC_INCLUDES_DEFAULT +AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl +AC_BEFORE([$0], [LT_LANG])dnl +AC_BEFORE([$0], [LT_OUTPUT])dnl +AC_BEFORE([$0], [LTDL_INIT])dnl +m4_require([_LT_CHECK_BUILDDIR])dnl + +dnl Autoconf doesn't catch unexpanded LT_ macros by default: +m4_pattern_forbid([^_?LT_[A-Z_]+$])dnl +m4_pattern_allow([^(_LT_EOF|LT_DLGLOBAL|LT_DLLAZY_OR_NOW|LT_MULTI_MODULE)$])dnl +dnl aclocal doesn't pull ltoptions.m4, ltsugar.m4, or ltversion.m4 +dnl unless we require an AC_DEFUNed macro: +AC_REQUIRE([LTOPTIONS_VERSION])dnl +AC_REQUIRE([LTSUGAR_VERSION])dnl +AC_REQUIRE([LTVERSION_VERSION])dnl +AC_REQUIRE([LTOBSOLETE_VERSION])dnl +m4_require([_LT_PROG_LTMAIN])dnl + +_LT_SHELL_INIT([SHELL=${CONFIG_SHELL-/bin/sh}]) + +dnl Parse OPTIONS +_LT_SET_OPTIONS([$0], [$1]) + +# This can be used to rebuild libtool when needed +LIBTOOL_DEPS="$ltmain" + +# Always use our own libtool. +LIBTOOL='$(SHELL) $(top_builddir)/libtool' +AC_SUBST(LIBTOOL)dnl + +_LT_SETUP + +# Only expand once: +m4_define([LT_INIT]) +])# LT_INIT + +# Old names: +AU_ALIAS([AC_PROG_LIBTOOL], [LT_INIT]) +AU_ALIAS([AM_PROG_LIBTOOL], [LT_INIT]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_PROG_LIBTOOL], []) +dnl AC_DEFUN([AM_PROG_LIBTOOL], []) + + +# _LT_CC_BASENAME(CC) +# ------------------- +# Calculate cc_basename. Skip known compiler wrappers and cross-prefix. +m4_defun([_LT_CC_BASENAME], +[for cc_temp in $1""; do + case $cc_temp in + compile | *[[\\/]]compile | ccache | *[[\\/]]ccache ) ;; + distcc | *[[\\/]]distcc | purify | *[[\\/]]purify ) ;; + \-*) ;; + *) break;; + esac +done +cc_basename=`$ECHO "$cc_temp" | $SED "s%.*/%%; s%^$host_alias-%%"` +]) + + +# _LT_FILEUTILS_DEFAULTS +# ---------------------- +# It is okay to use these file commands and assume they have been set +# sensibly after `m4_require([_LT_FILEUTILS_DEFAULTS])'. +m4_defun([_LT_FILEUTILS_DEFAULTS], +[: ${CP="cp -f"} +: ${MV="mv -f"} +: ${RM="rm -f"} +])# _LT_FILEUTILS_DEFAULTS + + +# _LT_SETUP +# --------- +m4_defun([_LT_SETUP], +[AC_REQUIRE([AC_CANONICAL_HOST])dnl +AC_REQUIRE([AC_CANONICAL_BUILD])dnl +AC_REQUIRE([_LT_PREPARE_SED_QUOTE_VARS])dnl +AC_REQUIRE([_LT_PROG_ECHO_BACKSLASH])dnl + +_LT_DECL([], [PATH_SEPARATOR], [1], [The PATH separator for the build system])dnl +dnl +_LT_DECL([], [host_alias], [0], [The host system])dnl +_LT_DECL([], [host], [0])dnl +_LT_DECL([], [host_os], [0])dnl +dnl +_LT_DECL([], [build_alias], [0], [The build system])dnl +_LT_DECL([], [build], [0])dnl +_LT_DECL([], [build_os], [0])dnl +dnl +AC_REQUIRE([AC_PROG_CC])dnl +AC_REQUIRE([LT_PATH_LD])dnl +AC_REQUIRE([LT_PATH_NM])dnl +dnl +AC_REQUIRE([AC_PROG_LN_S])dnl +test -z "$LN_S" && LN_S="ln -s" +_LT_DECL([], [LN_S], [1], [Whether we need soft or hard links])dnl +dnl +AC_REQUIRE([LT_CMD_MAX_LEN])dnl +_LT_DECL([objext], [ac_objext], [0], [Object file suffix (normally "o")])dnl +_LT_DECL([], [exeext], [0], [Executable file suffix (normally "")])dnl +dnl +m4_require([_LT_FILEUTILS_DEFAULTS])dnl +m4_require([_LT_CHECK_SHELL_FEATURES])dnl +m4_require([_LT_PATH_CONVERSION_FUNCTIONS])dnl +m4_require([_LT_CMD_RELOAD])dnl +m4_require([_LT_CHECK_MAGIC_METHOD])dnl +m4_require([_LT_CHECK_SHAREDLIB_FROM_LINKLIB])dnl +m4_require([_LT_CMD_OLD_ARCHIVE])dnl +m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl +m4_require([_LT_WITH_SYSROOT])dnl + +_LT_CONFIG_LIBTOOL_INIT([ +# See if we are running on zsh, and set the options which allow our +# commands through without removal of \ escapes INIT. +if test -n "\${ZSH_VERSION+set}" ; then + setopt NO_GLOB_SUBST +fi +]) +if test -n "${ZSH_VERSION+set}" ; then + setopt NO_GLOB_SUBST +fi + +_LT_CHECK_OBJDIR + +m4_require([_LT_TAG_COMPILER])dnl + +case $host_os in +aix3*) + # AIX sometimes has problems with the GCC collect2 program. For some + # reason, if we set the COLLECT_NAMES environment variable, the problems + # vanish in a puff of smoke. + if test "X${COLLECT_NAMES+set}" != Xset; then + COLLECT_NAMES= + export COLLECT_NAMES + fi + ;; +esac + +# Global variables: +ofile=libtool +can_build_shared=yes + +# All known linkers require a `.a' archive for static linking (except MSVC, +# which needs '.lib'). +libext=a + +with_gnu_ld="$lt_cv_prog_gnu_ld" + +old_CC="$CC" +old_CFLAGS="$CFLAGS" + +# Set sane defaults for various variables +test -z "$CC" && CC=cc +test -z "$LTCC" && LTCC=$CC +test -z "$LTCFLAGS" && LTCFLAGS=$CFLAGS +test -z "$LD" && LD=ld +test -z "$ac_objext" && ac_objext=o + +_LT_CC_BASENAME([$compiler]) + +# Only perform the check for file, if the check method requires it +test -z "$MAGIC_CMD" && MAGIC_CMD=file +case $deplibs_check_method in +file_magic*) + if test "$file_magic_cmd" = '$MAGIC_CMD'; then + _LT_PATH_MAGIC + fi + ;; +esac + +# Use C for the default configuration in the libtool script +LT_SUPPORTED_TAG([CC]) +_LT_LANG_C_CONFIG +_LT_LANG_DEFAULT_CONFIG +_LT_CONFIG_COMMANDS +])# _LT_SETUP + + +# _LT_PREPARE_SED_QUOTE_VARS +# -------------------------- +# Define a few sed substitution that help us do robust quoting. +m4_defun([_LT_PREPARE_SED_QUOTE_VARS], +[# Backslashify metacharacters that are still active within +# double-quoted strings. +sed_quote_subst='s/\([["`$\\]]\)/\\\1/g' + +# Same as above, but do not quote variable references. +double_quote_subst='s/\([["`\\]]\)/\\\1/g' + +# Sed substitution to delay expansion of an escaped shell variable in a +# double_quote_subst'ed string. +delay_variable_subst='s/\\\\\\\\\\\$/\\\\\\$/g' + +# Sed substitution to delay expansion of an escaped single quote. +delay_single_quote_subst='s/'\''/'\'\\\\\\\'\''/g' + +# Sed substitution to avoid accidental globbing in evaled expressions +no_glob_subst='s/\*/\\\*/g' +]) + +# _LT_PROG_LTMAIN +# --------------- +# Note that this code is called both from `configure', and `config.status' +# now that we use AC_CONFIG_COMMANDS to generate libtool. Notably, +# `config.status' has no value for ac_aux_dir unless we are using Automake, +# so we pass a copy along to make sure it has a sensible value anyway. +m4_defun([_LT_PROG_LTMAIN], +[m4_ifdef([AC_REQUIRE_AUX_FILE], [AC_REQUIRE_AUX_FILE([ltmain.sh])])dnl +_LT_CONFIG_LIBTOOL_INIT([ac_aux_dir='$ac_aux_dir']) +ltmain="$ac_aux_dir/ltmain.sh" +])# _LT_PROG_LTMAIN + + +## ------------------------------------- ## +## Accumulate code for creating libtool. ## +## ------------------------------------- ## + +# So that we can recreate a full libtool script including additional +# tags, we accumulate the chunks of code to send to AC_CONFIG_COMMANDS +# in macros and then make a single call at the end using the `libtool' +# label. + + +# _LT_CONFIG_LIBTOOL_INIT([INIT-COMMANDS]) +# ---------------------------------------- +# Register INIT-COMMANDS to be passed to AC_CONFIG_COMMANDS later. +m4_define([_LT_CONFIG_LIBTOOL_INIT], +[m4_ifval([$1], + [m4_append([_LT_OUTPUT_LIBTOOL_INIT], + [$1 +])])]) + +# Initialize. +m4_define([_LT_OUTPUT_LIBTOOL_INIT]) + + +# _LT_CONFIG_LIBTOOL([COMMANDS]) +# ------------------------------ +# Register COMMANDS to be passed to AC_CONFIG_COMMANDS later. +m4_define([_LT_CONFIG_LIBTOOL], +[m4_ifval([$1], + [m4_append([_LT_OUTPUT_LIBTOOL_COMMANDS], + [$1 +])])]) + +# Initialize. +m4_define([_LT_OUTPUT_LIBTOOL_COMMANDS]) + + +# _LT_CONFIG_SAVE_COMMANDS([COMMANDS], [INIT_COMMANDS]) +# ----------------------------------------------------- +m4_defun([_LT_CONFIG_SAVE_COMMANDS], +[_LT_CONFIG_LIBTOOL([$1]) +_LT_CONFIG_LIBTOOL_INIT([$2]) +]) + + +# _LT_FORMAT_COMMENT([COMMENT]) +# ----------------------------- +# Add leading comment marks to the start of each line, and a trailing +# full-stop to the whole comment if one is not present already. +m4_define([_LT_FORMAT_COMMENT], +[m4_ifval([$1], [ +m4_bpatsubst([m4_bpatsubst([$1], [^ *], [# ])], + [['`$\]], [\\\&])]m4_bmatch([$1], [[!?.]$], [], [.]) +)]) + + + +## ------------------------ ## +## FIXME: Eliminate VARNAME ## +## ------------------------ ## + + +# _LT_DECL([CONFIGNAME], VARNAME, VALUE, [DESCRIPTION], [IS-TAGGED?]) +# ------------------------------------------------------------------- +# CONFIGNAME is the name given to the value in the libtool script. +# VARNAME is the (base) name used in the configure script. +# VALUE may be 0, 1 or 2 for a computed quote escaped value based on +# VARNAME. Any other value will be used directly. +m4_define([_LT_DECL], +[lt_if_append_uniq([lt_decl_varnames], [$2], [, ], + [lt_dict_add_subkey([lt_decl_dict], [$2], [libtool_name], + [m4_ifval([$1], [$1], [$2])]) + lt_dict_add_subkey([lt_decl_dict], [$2], [value], [$3]) + m4_ifval([$4], + [lt_dict_add_subkey([lt_decl_dict], [$2], [description], [$4])]) + lt_dict_add_subkey([lt_decl_dict], [$2], + [tagged?], [m4_ifval([$5], [yes], [no])])]) +]) + + +# _LT_TAGDECL([CONFIGNAME], VARNAME, VALUE, [DESCRIPTION]) +# -------------------------------------------------------- +m4_define([_LT_TAGDECL], [_LT_DECL([$1], [$2], [$3], [$4], [yes])]) + + +# lt_decl_tag_varnames([SEPARATOR], [VARNAME1...]) +# ------------------------------------------------ +m4_define([lt_decl_tag_varnames], +[_lt_decl_filter([tagged?], [yes], $@)]) + + +# _lt_decl_filter(SUBKEY, VALUE, [SEPARATOR], [VARNAME1..]) +# --------------------------------------------------------- +m4_define([_lt_decl_filter], +[m4_case([$#], + [0], [m4_fatal([$0: too few arguments: $#])], + [1], [m4_fatal([$0: too few arguments: $#: $1])], + [2], [lt_dict_filter([lt_decl_dict], [$1], [$2], [], lt_decl_varnames)], + [3], [lt_dict_filter([lt_decl_dict], [$1], [$2], [$3], lt_decl_varnames)], + [lt_dict_filter([lt_decl_dict], $@)])[]dnl +]) + + +# lt_decl_quote_varnames([SEPARATOR], [VARNAME1...]) +# -------------------------------------------------- +m4_define([lt_decl_quote_varnames], +[_lt_decl_filter([value], [1], $@)]) + + +# lt_decl_dquote_varnames([SEPARATOR], [VARNAME1...]) +# --------------------------------------------------- +m4_define([lt_decl_dquote_varnames], +[_lt_decl_filter([value], [2], $@)]) + + +# lt_decl_varnames_tagged([SEPARATOR], [VARNAME1...]) +# --------------------------------------------------- +m4_define([lt_decl_varnames_tagged], +[m4_assert([$# <= 2])dnl +_$0(m4_quote(m4_default([$1], [[, ]])), + m4_ifval([$2], [[$2]], [m4_dquote(lt_decl_tag_varnames)]), + m4_split(m4_normalize(m4_quote(_LT_TAGS)), [ ]))]) +m4_define([_lt_decl_varnames_tagged], +[m4_ifval([$3], [lt_combine([$1], [$2], [_], $3)])]) + + +# lt_decl_all_varnames([SEPARATOR], [VARNAME1...]) +# ------------------------------------------------ +m4_define([lt_decl_all_varnames], +[_$0(m4_quote(m4_default([$1], [[, ]])), + m4_if([$2], [], + m4_quote(lt_decl_varnames), + m4_quote(m4_shift($@))))[]dnl +]) +m4_define([_lt_decl_all_varnames], +[lt_join($@, lt_decl_varnames_tagged([$1], + lt_decl_tag_varnames([[, ]], m4_shift($@))))dnl +]) + + +# _LT_CONFIG_STATUS_DECLARE([VARNAME]) +# ------------------------------------ +# Quote a variable value, and forward it to `config.status' so that its +# declaration there will have the same value as in `configure'. VARNAME +# must have a single quote delimited value for this to work. +m4_define([_LT_CONFIG_STATUS_DECLARE], +[$1='`$ECHO "$][$1" | $SED "$delay_single_quote_subst"`']) + + +# _LT_CONFIG_STATUS_DECLARATIONS +# ------------------------------ +# We delimit libtool config variables with single quotes, so when +# we write them to config.status, we have to be sure to quote all +# embedded single quotes properly. In configure, this macro expands +# each variable declared with _LT_DECL (and _LT_TAGDECL) into: +# +# ='`$ECHO "$" | $SED "$delay_single_quote_subst"`' +m4_defun([_LT_CONFIG_STATUS_DECLARATIONS], +[m4_foreach([_lt_var], m4_quote(lt_decl_all_varnames), + [m4_n([_LT_CONFIG_STATUS_DECLARE(_lt_var)])])]) + + +# _LT_LIBTOOL_TAGS +# ---------------- +# Output comment and list of tags supported by the script +m4_defun([_LT_LIBTOOL_TAGS], +[_LT_FORMAT_COMMENT([The names of the tagged configurations supported by this script])dnl +available_tags="_LT_TAGS"dnl +]) + + +# _LT_LIBTOOL_DECLARE(VARNAME, [TAG]) +# ----------------------------------- +# Extract the dictionary values for VARNAME (optionally with TAG) and +# expand to a commented shell variable setting: +# +# # Some comment about what VAR is for. +# visible_name=$lt_internal_name +m4_define([_LT_LIBTOOL_DECLARE], +[_LT_FORMAT_COMMENT(m4_quote(lt_dict_fetch([lt_decl_dict], [$1], + [description])))[]dnl +m4_pushdef([_libtool_name], + m4_quote(lt_dict_fetch([lt_decl_dict], [$1], [libtool_name])))[]dnl +m4_case(m4_quote(lt_dict_fetch([lt_decl_dict], [$1], [value])), + [0], [_libtool_name=[$]$1], + [1], [_libtool_name=$lt_[]$1], + [2], [_libtool_name=$lt_[]$1], + [_libtool_name=lt_dict_fetch([lt_decl_dict], [$1], [value])])[]dnl +m4_ifval([$2], [_$2])[]m4_popdef([_libtool_name])[]dnl +]) + + +# _LT_LIBTOOL_CONFIG_VARS +# ----------------------- +# Produce commented declarations of non-tagged libtool config variables +# suitable for insertion in the LIBTOOL CONFIG section of the `libtool' +# script. Tagged libtool config variables (even for the LIBTOOL CONFIG +# section) are produced by _LT_LIBTOOL_TAG_VARS. +m4_defun([_LT_LIBTOOL_CONFIG_VARS], +[m4_foreach([_lt_var], + m4_quote(_lt_decl_filter([tagged?], [no], [], lt_decl_varnames)), + [m4_n([_LT_LIBTOOL_DECLARE(_lt_var)])])]) + + +# _LT_LIBTOOL_TAG_VARS(TAG) +# ------------------------- +m4_define([_LT_LIBTOOL_TAG_VARS], +[m4_foreach([_lt_var], m4_quote(lt_decl_tag_varnames), + [m4_n([_LT_LIBTOOL_DECLARE(_lt_var, [$1])])])]) + + +# _LT_TAGVAR(VARNAME, [TAGNAME]) +# ------------------------------ +m4_define([_LT_TAGVAR], [m4_ifval([$2], [$1_$2], [$1])]) + + +# _LT_CONFIG_COMMANDS +# ------------------- +# Send accumulated output to $CONFIG_STATUS. Thanks to the lists of +# variables for single and double quote escaping we saved from calls +# to _LT_DECL, we can put quote escaped variables declarations +# into `config.status', and then the shell code to quote escape them in +# for loops in `config.status'. Finally, any additional code accumulated +# from calls to _LT_CONFIG_LIBTOOL_INIT is expanded. +m4_defun([_LT_CONFIG_COMMANDS], +[AC_PROVIDE_IFELSE([LT_OUTPUT], + dnl If the libtool generation code has been placed in $CONFIG_LT, + dnl instead of duplicating it all over again into config.status, + dnl then we will have config.status run $CONFIG_LT later, so it + dnl needs to know what name is stored there: + [AC_CONFIG_COMMANDS([libtool], + [$SHELL $CONFIG_LT || AS_EXIT(1)], [CONFIG_LT='$CONFIG_LT'])], + dnl If the libtool generation code is destined for config.status, + dnl expand the accumulated commands and init code now: + [AC_CONFIG_COMMANDS([libtool], + [_LT_OUTPUT_LIBTOOL_COMMANDS], [_LT_OUTPUT_LIBTOOL_COMMANDS_INIT])]) +])#_LT_CONFIG_COMMANDS + + +# Initialize. +m4_define([_LT_OUTPUT_LIBTOOL_COMMANDS_INIT], +[ + +# The HP-UX ksh and POSIX shell print the target directory to stdout +# if CDPATH is set. +(unset CDPATH) >/dev/null 2>&1 && unset CDPATH + +sed_quote_subst='$sed_quote_subst' +double_quote_subst='$double_quote_subst' +delay_variable_subst='$delay_variable_subst' +_LT_CONFIG_STATUS_DECLARATIONS +LTCC='$LTCC' +LTCFLAGS='$LTCFLAGS' +compiler='$compiler_DEFAULT' + +# A function that is used when there is no print builtin or printf. +func_fallback_echo () +{ + eval 'cat <<_LTECHO_EOF +\$[]1 +_LTECHO_EOF' +} + +# Quote evaled strings. +for var in lt_decl_all_varnames([[ \ +]], lt_decl_quote_varnames); do + case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in + *[[\\\\\\\`\\"\\\$]]*) + eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED \\"\\\$sed_quote_subst\\"\\\`\\\\\\"" + ;; + *) + eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\"" + ;; + esac +done + +# Double-quote double-evaled strings. +for var in lt_decl_all_varnames([[ \ +]], lt_decl_dquote_varnames); do + case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in + *[[\\\\\\\`\\"\\\$]]*) + eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED -e \\"\\\$double_quote_subst\\" -e \\"\\\$sed_quote_subst\\" -e \\"\\\$delay_variable_subst\\"\\\`\\\\\\"" + ;; + *) + eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\"" + ;; + esac +done + +_LT_OUTPUT_LIBTOOL_INIT +]) + +# _LT_GENERATED_FILE_INIT(FILE, [COMMENT]) +# ------------------------------------ +# Generate a child script FILE with all initialization necessary to +# reuse the environment learned by the parent script, and make the +# file executable. If COMMENT is supplied, it is inserted after the +# `#!' sequence but before initialization text begins. After this +# macro, additional text can be appended to FILE to form the body of +# the child script. The macro ends with non-zero status if the +# file could not be fully written (such as if the disk is full). +m4_ifdef([AS_INIT_GENERATED], +[m4_defun([_LT_GENERATED_FILE_INIT],[AS_INIT_GENERATED($@)])], +[m4_defun([_LT_GENERATED_FILE_INIT], +[m4_require([AS_PREPARE])]dnl +[m4_pushdef([AS_MESSAGE_LOG_FD])]dnl +[lt_write_fail=0 +cat >$1 <<_ASEOF || lt_write_fail=1 +#! $SHELL +# Generated by $as_me. +$2 +SHELL=\${CONFIG_SHELL-$SHELL} +export SHELL +_ASEOF +cat >>$1 <<\_ASEOF || lt_write_fail=1 +AS_SHELL_SANITIZE +_AS_PREPARE +exec AS_MESSAGE_FD>&1 +_ASEOF +test $lt_write_fail = 0 && chmod +x $1[]dnl +m4_popdef([AS_MESSAGE_LOG_FD])])])# _LT_GENERATED_FILE_INIT + +# LT_OUTPUT +# --------- +# This macro allows early generation of the libtool script (before +# AC_OUTPUT is called), incase it is used in configure for compilation +# tests. +AC_DEFUN([LT_OUTPUT], +[: ${CONFIG_LT=./config.lt} +AC_MSG_NOTICE([creating $CONFIG_LT]) +_LT_GENERATED_FILE_INIT(["$CONFIG_LT"], +[# Run this file to recreate a libtool stub with the current configuration.]) + +cat >>"$CONFIG_LT" <<\_LTEOF +lt_cl_silent=false +exec AS_MESSAGE_LOG_FD>>config.log +{ + echo + AS_BOX([Running $as_me.]) +} >&AS_MESSAGE_LOG_FD + +lt_cl_help="\ +\`$as_me' creates a local libtool stub from the current configuration, +for use in further configure time tests before the real libtool is +generated. + +Usage: $[0] [[OPTIONS]] + + -h, --help print this help, then exit + -V, --version print version number, then exit + -q, --quiet do not print progress messages + -d, --debug don't remove temporary files + +Report bugs to ." + +lt_cl_version="\ +m4_ifset([AC_PACKAGE_NAME], [AC_PACKAGE_NAME ])config.lt[]dnl +m4_ifset([AC_PACKAGE_VERSION], [ AC_PACKAGE_VERSION]) +configured by $[0], generated by m4_PACKAGE_STRING. + +Copyright (C) 2011 Free Software Foundation, Inc. +This config.lt script is free software; the Free Software Foundation +gives unlimited permision to copy, distribute and modify it." + +while test $[#] != 0 +do + case $[1] in + --version | --v* | -V ) + echo "$lt_cl_version"; exit 0 ;; + --help | --h* | -h ) + echo "$lt_cl_help"; exit 0 ;; + --debug | --d* | -d ) + debug=: ;; + --quiet | --q* | --silent | --s* | -q ) + lt_cl_silent=: ;; + + -*) AC_MSG_ERROR([unrecognized option: $[1] +Try \`$[0] --help' for more information.]) ;; + + *) AC_MSG_ERROR([unrecognized argument: $[1] +Try \`$[0] --help' for more information.]) ;; + esac + shift +done + +if $lt_cl_silent; then + exec AS_MESSAGE_FD>/dev/null +fi +_LTEOF + +cat >>"$CONFIG_LT" <<_LTEOF +_LT_OUTPUT_LIBTOOL_COMMANDS_INIT +_LTEOF + +cat >>"$CONFIG_LT" <<\_LTEOF +AC_MSG_NOTICE([creating $ofile]) +_LT_OUTPUT_LIBTOOL_COMMANDS +AS_EXIT(0) +_LTEOF +chmod +x "$CONFIG_LT" + +# configure is writing to config.log, but config.lt does its own redirection, +# appending to config.log, which fails on DOS, as config.log is still kept +# open by configure. Here we exec the FD to /dev/null, effectively closing +# config.log, so it can be properly (re)opened and appended to by config.lt. +lt_cl_success=: +test "$silent" = yes && + lt_config_lt_args="$lt_config_lt_args --quiet" +exec AS_MESSAGE_LOG_FD>/dev/null +$SHELL "$CONFIG_LT" $lt_config_lt_args || lt_cl_success=false +exec AS_MESSAGE_LOG_FD>>config.log +$lt_cl_success || AS_EXIT(1) +])# LT_OUTPUT + + +# _LT_CONFIG(TAG) +# --------------- +# If TAG is the built-in tag, create an initial libtool script with a +# default configuration from the untagged config vars. Otherwise add code +# to config.status for appending the configuration named by TAG from the +# matching tagged config vars. +m4_defun([_LT_CONFIG], +[m4_require([_LT_FILEUTILS_DEFAULTS])dnl +_LT_CONFIG_SAVE_COMMANDS([ + m4_define([_LT_TAG], m4_if([$1], [], [C], [$1]))dnl + m4_if(_LT_TAG, [C], [ + # See if we are running on zsh, and set the options which allow our + # commands through without removal of \ escapes. + if test -n "${ZSH_VERSION+set}" ; then + setopt NO_GLOB_SUBST + fi + + cfgfile="${ofile}T" + trap "$RM \"$cfgfile\"; exit 1" 1 2 15 + $RM "$cfgfile" + + cat <<_LT_EOF >> "$cfgfile" +#! $SHELL + +# `$ECHO "$ofile" | sed 's%^.*/%%'` - Provide generalized library-building support services. +# Generated automatically by $as_me ($PACKAGE$TIMESTAMP) $VERSION +# Libtool was configured on host `(hostname || uname -n) 2>/dev/null | sed 1q`: +# NOTE: Changes made to this file will be lost: look at ltmain.sh. +# +_LT_COPYING +_LT_LIBTOOL_TAGS + +# ### BEGIN LIBTOOL CONFIG +_LT_LIBTOOL_CONFIG_VARS +_LT_LIBTOOL_TAG_VARS +# ### END LIBTOOL CONFIG + +_LT_EOF + + case $host_os in + aix3*) + cat <<\_LT_EOF >> "$cfgfile" +# AIX sometimes has problems with the GCC collect2 program. For some +# reason, if we set the COLLECT_NAMES environment variable, the problems +# vanish in a puff of smoke. +if test "X${COLLECT_NAMES+set}" != Xset; then + COLLECT_NAMES= + export COLLECT_NAMES +fi +_LT_EOF + ;; + esac + + _LT_PROG_LTMAIN + + # We use sed instead of cat because bash on DJGPP gets confused if + # if finds mixed CR/LF and LF-only lines. Since sed operates in + # text mode, it properly converts lines to CR/LF. This bash problem + # is reportedly fixed, but why not run on old versions too? + sed '$q' "$ltmain" >> "$cfgfile" \ + || (rm -f "$cfgfile"; exit 1) + + _LT_PROG_REPLACE_SHELLFNS + + mv -f "$cfgfile" "$ofile" || + (rm -f "$ofile" && cp "$cfgfile" "$ofile" && rm -f "$cfgfile") + chmod +x "$ofile" +], +[cat <<_LT_EOF >> "$ofile" + +dnl Unfortunately we have to use $1 here, since _LT_TAG is not expanded +dnl in a comment (ie after a #). +# ### BEGIN LIBTOOL TAG CONFIG: $1 +_LT_LIBTOOL_TAG_VARS(_LT_TAG) +# ### END LIBTOOL TAG CONFIG: $1 +_LT_EOF +])dnl /m4_if +], +[m4_if([$1], [], [ + PACKAGE='$PACKAGE' + VERSION='$VERSION' + TIMESTAMP='$TIMESTAMP' + RM='$RM' + ofile='$ofile'], []) +])dnl /_LT_CONFIG_SAVE_COMMANDS +])# _LT_CONFIG + + +# LT_SUPPORTED_TAG(TAG) +# --------------------- +# Trace this macro to discover what tags are supported by the libtool +# --tag option, using: +# autoconf --trace 'LT_SUPPORTED_TAG:$1' +AC_DEFUN([LT_SUPPORTED_TAG], []) + + +# C support is built-in for now +m4_define([_LT_LANG_C_enabled], []) +m4_define([_LT_TAGS], []) + + +# LT_LANG(LANG) +# ------------- +# Enable libtool support for the given language if not already enabled. +AC_DEFUN([LT_LANG], +[AC_BEFORE([$0], [LT_OUTPUT])dnl +m4_case([$1], + [C], [_LT_LANG(C)], + [C++], [_LT_LANG(CXX)], + [Go], [_LT_LANG(GO)], + [Java], [_LT_LANG(GCJ)], + [Fortran 77], [_LT_LANG(F77)], + [Fortran], [_LT_LANG(FC)], + [Windows Resource], [_LT_LANG(RC)], + [m4_ifdef([_LT_LANG_]$1[_CONFIG], + [_LT_LANG($1)], + [m4_fatal([$0: unsupported language: "$1"])])])dnl +])# LT_LANG + + +# _LT_LANG(LANGNAME) +# ------------------ +m4_defun([_LT_LANG], +[m4_ifdef([_LT_LANG_]$1[_enabled], [], + [LT_SUPPORTED_TAG([$1])dnl + m4_append([_LT_TAGS], [$1 ])dnl + m4_define([_LT_LANG_]$1[_enabled], [])dnl + _LT_LANG_$1_CONFIG($1)])dnl +])# _LT_LANG + + +m4_ifndef([AC_PROG_GO], [ +############################################################ +# NOTE: This macro has been submitted for inclusion into # +# GNU Autoconf as AC_PROG_GO. When it is available in # +# a released version of Autoconf we should remove this # +# macro and use it instead. # +############################################################ +m4_defun([AC_PROG_GO], +[AC_LANG_PUSH(Go)dnl +AC_ARG_VAR([GOC], [Go compiler command])dnl +AC_ARG_VAR([GOFLAGS], [Go compiler flags])dnl +_AC_ARG_VAR_LDFLAGS()dnl +AC_CHECK_TOOL(GOC, gccgo) +if test -z "$GOC"; then + if test -n "$ac_tool_prefix"; then + AC_CHECK_PROG(GOC, [${ac_tool_prefix}gccgo], [${ac_tool_prefix}gccgo]) + fi +fi +if test -z "$GOC"; then + AC_CHECK_PROG(GOC, gccgo, gccgo, false) +fi +])#m4_defun +])#m4_ifndef + + +# _LT_LANG_DEFAULT_CONFIG +# ----------------------- +m4_defun([_LT_LANG_DEFAULT_CONFIG], +[AC_PROVIDE_IFELSE([AC_PROG_CXX], + [LT_LANG(CXX)], + [m4_define([AC_PROG_CXX], defn([AC_PROG_CXX])[LT_LANG(CXX)])]) + +AC_PROVIDE_IFELSE([AC_PROG_F77], + [LT_LANG(F77)], + [m4_define([AC_PROG_F77], defn([AC_PROG_F77])[LT_LANG(F77)])]) + +AC_PROVIDE_IFELSE([AC_PROG_FC], + [LT_LANG(FC)], + [m4_define([AC_PROG_FC], defn([AC_PROG_FC])[LT_LANG(FC)])]) + +dnl The call to [A][M_PROG_GCJ] is quoted like that to stop aclocal +dnl pulling things in needlessly. +AC_PROVIDE_IFELSE([AC_PROG_GCJ], + [LT_LANG(GCJ)], + [AC_PROVIDE_IFELSE([A][M_PROG_GCJ], + [LT_LANG(GCJ)], + [AC_PROVIDE_IFELSE([LT_PROG_GCJ], + [LT_LANG(GCJ)], + [m4_ifdef([AC_PROG_GCJ], + [m4_define([AC_PROG_GCJ], defn([AC_PROG_GCJ])[LT_LANG(GCJ)])]) + m4_ifdef([A][M_PROG_GCJ], + [m4_define([A][M_PROG_GCJ], defn([A][M_PROG_GCJ])[LT_LANG(GCJ)])]) + m4_ifdef([LT_PROG_GCJ], + [m4_define([LT_PROG_GCJ], defn([LT_PROG_GCJ])[LT_LANG(GCJ)])])])])]) + +AC_PROVIDE_IFELSE([AC_PROG_GO], + [LT_LANG(GO)], + [m4_define([AC_PROG_GO], defn([AC_PROG_GO])[LT_LANG(GO)])]) + +AC_PROVIDE_IFELSE([LT_PROG_RC], + [LT_LANG(RC)], + [m4_define([LT_PROG_RC], defn([LT_PROG_RC])[LT_LANG(RC)])]) +])# _LT_LANG_DEFAULT_CONFIG + +# Obsolete macros: +AU_DEFUN([AC_LIBTOOL_CXX], [LT_LANG(C++)]) +AU_DEFUN([AC_LIBTOOL_F77], [LT_LANG(Fortran 77)]) +AU_DEFUN([AC_LIBTOOL_FC], [LT_LANG(Fortran)]) +AU_DEFUN([AC_LIBTOOL_GCJ], [LT_LANG(Java)]) +AU_DEFUN([AC_LIBTOOL_RC], [LT_LANG(Windows Resource)]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_LIBTOOL_CXX], []) +dnl AC_DEFUN([AC_LIBTOOL_F77], []) +dnl AC_DEFUN([AC_LIBTOOL_FC], []) +dnl AC_DEFUN([AC_LIBTOOL_GCJ], []) +dnl AC_DEFUN([AC_LIBTOOL_RC], []) + + +# _LT_TAG_COMPILER +# ---------------- +m4_defun([_LT_TAG_COMPILER], +[AC_REQUIRE([AC_PROG_CC])dnl + +_LT_DECL([LTCC], [CC], [1], [A C compiler])dnl +_LT_DECL([LTCFLAGS], [CFLAGS], [1], [LTCC compiler flags])dnl +_LT_TAGDECL([CC], [compiler], [1], [A language specific compiler])dnl +_LT_TAGDECL([with_gcc], [GCC], [0], [Is the compiler the GNU compiler?])dnl + +# If no C compiler was specified, use CC. +LTCC=${LTCC-"$CC"} + +# If no C compiler flags were specified, use CFLAGS. +LTCFLAGS=${LTCFLAGS-"$CFLAGS"} + +# Allow CC to be a program name with arguments. +compiler=$CC +])# _LT_TAG_COMPILER + + +# _LT_COMPILER_BOILERPLATE +# ------------------------ +# Check for compiler boilerplate output or warnings with +# the simple compiler test code. +m4_defun([_LT_COMPILER_BOILERPLATE], +[m4_require([_LT_DECL_SED])dnl +ac_outfile=conftest.$ac_objext +echo "$lt_simple_compile_test_code" >conftest.$ac_ext +eval "$ac_compile" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err +_lt_compiler_boilerplate=`cat conftest.err` +$RM conftest* +])# _LT_COMPILER_BOILERPLATE + + +# _LT_LINKER_BOILERPLATE +# ---------------------- +# Check for linker boilerplate output or warnings with +# the simple link test code. +m4_defun([_LT_LINKER_BOILERPLATE], +[m4_require([_LT_DECL_SED])dnl +ac_outfile=conftest.$ac_objext +echo "$lt_simple_link_test_code" >conftest.$ac_ext +eval "$ac_link" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err +_lt_linker_boilerplate=`cat conftest.err` +$RM -r conftest* +])# _LT_LINKER_BOILERPLATE + +# _LT_REQUIRED_DARWIN_CHECKS +# ------------------------- +m4_defun_once([_LT_REQUIRED_DARWIN_CHECKS],[ + case $host_os in + rhapsody* | darwin*) + AC_CHECK_TOOL([DSYMUTIL], [dsymutil], [:]) + AC_CHECK_TOOL([NMEDIT], [nmedit], [:]) + AC_CHECK_TOOL([LIPO], [lipo], [:]) + AC_CHECK_TOOL([OTOOL], [otool], [:]) + AC_CHECK_TOOL([OTOOL64], [otool64], [:]) + _LT_DECL([], [DSYMUTIL], [1], + [Tool to manipulate archived DWARF debug symbol files on Mac OS X]) + _LT_DECL([], [NMEDIT], [1], + [Tool to change global to local symbols on Mac OS X]) + _LT_DECL([], [LIPO], [1], + [Tool to manipulate fat objects and archives on Mac OS X]) + _LT_DECL([], [OTOOL], [1], + [ldd/readelf like tool for Mach-O binaries on Mac OS X]) + _LT_DECL([], [OTOOL64], [1], + [ldd/readelf like tool for 64 bit Mach-O binaries on Mac OS X 10.4]) + + AC_CACHE_CHECK([for -single_module linker flag],[lt_cv_apple_cc_single_mod], + [lt_cv_apple_cc_single_mod=no + if test -z "${LT_MULTI_MODULE}"; then + # By default we will add the -single_module flag. You can override + # by either setting the environment variable LT_MULTI_MODULE + # non-empty at configure time, or by adding -multi_module to the + # link flags. + rm -rf libconftest.dylib* + echo "int foo(void){return 1;}" > conftest.c + echo "$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \ +-dynamiclib -Wl,-single_module conftest.c" >&AS_MESSAGE_LOG_FD + $LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \ + -dynamiclib -Wl,-single_module conftest.c 2>conftest.err + _lt_result=$? + # If there is a non-empty error log, and "single_module" + # appears in it, assume the flag caused a linker warning + if test -s conftest.err && $GREP single_module conftest.err; then + cat conftest.err >&AS_MESSAGE_LOG_FD + # Otherwise, if the output was created with a 0 exit code from + # the compiler, it worked. + elif test -f libconftest.dylib && test $_lt_result -eq 0; then + lt_cv_apple_cc_single_mod=yes + else + cat conftest.err >&AS_MESSAGE_LOG_FD + fi + rm -rf libconftest.dylib* + rm -f conftest.* + fi]) + + AC_CACHE_CHECK([for -exported_symbols_list linker flag], + [lt_cv_ld_exported_symbols_list], + [lt_cv_ld_exported_symbols_list=no + save_LDFLAGS=$LDFLAGS + echo "_main" > conftest.sym + LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym" + AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])], + [lt_cv_ld_exported_symbols_list=yes], + [lt_cv_ld_exported_symbols_list=no]) + LDFLAGS="$save_LDFLAGS" + ]) + + AC_CACHE_CHECK([for -force_load linker flag],[lt_cv_ld_force_load], + [lt_cv_ld_force_load=no + cat > conftest.c << _LT_EOF +int forced_loaded() { return 2;} +_LT_EOF + echo "$LTCC $LTCFLAGS -c -o conftest.o conftest.c" >&AS_MESSAGE_LOG_FD + $LTCC $LTCFLAGS -c -o conftest.o conftest.c 2>&AS_MESSAGE_LOG_FD + echo "$AR cru libconftest.a conftest.o" >&AS_MESSAGE_LOG_FD + $AR cru libconftest.a conftest.o 2>&AS_MESSAGE_LOG_FD + echo "$RANLIB libconftest.a" >&AS_MESSAGE_LOG_FD + $RANLIB libconftest.a 2>&AS_MESSAGE_LOG_FD + cat > conftest.c << _LT_EOF +int main() { return 0;} +_LT_EOF + echo "$LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a" >&AS_MESSAGE_LOG_FD + $LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a 2>conftest.err + _lt_result=$? + if test -s conftest.err && $GREP force_load conftest.err; then + cat conftest.err >&AS_MESSAGE_LOG_FD + elif test -f conftest && test $_lt_result -eq 0 && $GREP forced_load conftest >/dev/null 2>&1 ; then + lt_cv_ld_force_load=yes + else + cat conftest.err >&AS_MESSAGE_LOG_FD + fi + rm -f conftest.err libconftest.a conftest conftest.c + rm -rf conftest.dSYM + ]) + case $host_os in + rhapsody* | darwin1.[[012]]) + _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;; + darwin1.*) + _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; + darwin*) # darwin 5.x on + # if running on 10.5 or later, the deployment target defaults + # to the OS version, if on x86, and 10.4, the deployment + # target defaults to 10.4. Don't you love it? + case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in + 10.0,*86*-darwin8*|10.0,*-darwin[[91]]*) + _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; + 10.[[012]]*) + _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; + 10.*) + _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; + esac + ;; + esac + if test "$lt_cv_apple_cc_single_mod" = "yes"; then + _lt_dar_single_mod='$single_module' + fi + if test "$lt_cv_ld_exported_symbols_list" = "yes"; then + _lt_dar_export_syms=' ${wl}-exported_symbols_list,$output_objdir/${libname}-symbols.expsym' + else + _lt_dar_export_syms='~$NMEDIT -s $output_objdir/${libname}-symbols.expsym ${lib}' + fi + if test "$DSYMUTIL" != ":" && test "$lt_cv_ld_force_load" = "no"; then + _lt_dsymutil='~$DSYMUTIL $lib || :' + else + _lt_dsymutil= + fi + ;; + esac +]) + + +# _LT_DARWIN_LINKER_FEATURES([TAG]) +# --------------------------------- +# Checks for linker and compiler features on darwin +m4_defun([_LT_DARWIN_LINKER_FEATURES], +[ + m4_require([_LT_REQUIRED_DARWIN_CHECKS]) + _LT_TAGVAR(archive_cmds_need_lc, $1)=no + _LT_TAGVAR(hardcode_direct, $1)=no + _LT_TAGVAR(hardcode_automatic, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported + if test "$lt_cv_ld_force_load" = "yes"; then + _LT_TAGVAR(whole_archive_flag_spec, $1)='`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience ${wl}-force_load,$conv\"; done; func_echo_all \"$new_convenience\"`' + m4_case([$1], [F77], [_LT_TAGVAR(compiler_needs_object, $1)=yes], + [FC], [_LT_TAGVAR(compiler_needs_object, $1)=yes]) + else + _LT_TAGVAR(whole_archive_flag_spec, $1)='' + fi + _LT_TAGVAR(link_all_deplibs, $1)=yes + _LT_TAGVAR(allow_undefined_flag, $1)="$_lt_dar_allow_undefined" + case $cc_basename in + ifort*) _lt_dar_can_shared=yes ;; + *) _lt_dar_can_shared=$GCC ;; + esac + if test "$_lt_dar_can_shared" = "yes"; then + output_verbose_link_cmd=func_echo_all + _LT_TAGVAR(archive_cmds, $1)="\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod${_lt_dsymutil}" + _LT_TAGVAR(module_cmds, $1)="\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags${_lt_dsymutil}" + _LT_TAGVAR(archive_expsym_cmds, $1)="sed 's,^,_,' < \$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring ${_lt_dar_single_mod}${_lt_dar_export_syms}${_lt_dsymutil}" + _LT_TAGVAR(module_expsym_cmds, $1)="sed -e 's,^,_,' < \$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags${_lt_dar_export_syms}${_lt_dsymutil}" + m4_if([$1], [CXX], +[ if test "$lt_cv_apple_cc_single_mod" != "yes"; then + _LT_TAGVAR(archive_cmds, $1)="\$CC -r -keep_private_externs -nostdlib -o \${lib}-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \${lib}-master.o \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring${_lt_dsymutil}" + _LT_TAGVAR(archive_expsym_cmds, $1)="sed 's,^,_,' < \$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -r -keep_private_externs -nostdlib -o \${lib}-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \${lib}-master.o \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring${_lt_dar_export_syms}${_lt_dsymutil}" + fi +],[]) + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi +]) + +# _LT_SYS_MODULE_PATH_AIX([TAGNAME]) +# ---------------------------------- +# Links a minimal program and checks the executable +# for the system default hardcoded library path. In most cases, +# this is /usr/lib:/lib, but when the MPI compilers are used +# the location of the communication and MPI libs are included too. +# If we don't find anything, use the default library path according +# to the aix ld manual. +# Store the results from the different compilers for each TAGNAME. +# Allow to override them for all tags through lt_cv_aix_libpath. +m4_defun([_LT_SYS_MODULE_PATH_AIX], +[m4_require([_LT_DECL_SED])dnl +if test "${lt_cv_aix_libpath+set}" = set; then + aix_libpath=$lt_cv_aix_libpath +else + AC_CACHE_VAL([_LT_TAGVAR([lt_cv_aix_libpath_], [$1])], + [AC_LINK_IFELSE([AC_LANG_PROGRAM],[ + lt_aix_libpath_sed='[ + /Import File Strings/,/^$/ { + /^0/ { + s/^0 *\([^ ]*\) *$/\1/ + p + } + }]' + _LT_TAGVAR([lt_cv_aix_libpath_], [$1])=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` + # Check for a 64-bit object if we didn't find anything. + if test -z "$_LT_TAGVAR([lt_cv_aix_libpath_], [$1])"; then + _LT_TAGVAR([lt_cv_aix_libpath_], [$1])=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` + fi],[]) + if test -z "$_LT_TAGVAR([lt_cv_aix_libpath_], [$1])"; then + _LT_TAGVAR([lt_cv_aix_libpath_], [$1])="/usr/lib:/lib" + fi + ]) + aix_libpath=$_LT_TAGVAR([lt_cv_aix_libpath_], [$1]) +fi +])# _LT_SYS_MODULE_PATH_AIX + + +# _LT_SHELL_INIT(ARG) +# ------------------- +m4_define([_LT_SHELL_INIT], +[m4_divert_text([M4SH-INIT], [$1 +])])# _LT_SHELL_INIT + + + +# _LT_PROG_ECHO_BACKSLASH +# ----------------------- +# Find how we can fake an echo command that does not interpret backslash. +# In particular, with Autoconf 2.60 or later we add some code to the start +# of the generated configure script which will find a shell with a builtin +# printf (which we can use as an echo command). +m4_defun([_LT_PROG_ECHO_BACKSLASH], +[ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' +ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO +ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO + +AC_MSG_CHECKING([how to print strings]) +# Test print first, because it will be a builtin if present. +if test "X`( print -r -- -n ) 2>/dev/null`" = X-n && \ + test "X`print -r -- $ECHO 2>/dev/null`" = "X$ECHO"; then + ECHO='print -r --' +elif test "X`printf %s $ECHO 2>/dev/null`" = "X$ECHO"; then + ECHO='printf %s\n' +else + # Use this function as a fallback that always works. + func_fallback_echo () + { + eval 'cat <<_LTECHO_EOF +$[]1 +_LTECHO_EOF' + } + ECHO='func_fallback_echo' +fi + +# func_echo_all arg... +# Invoke $ECHO with all args, space-separated. +func_echo_all () +{ + $ECHO "$*" +} + +case "$ECHO" in + printf*) AC_MSG_RESULT([printf]) ;; + print*) AC_MSG_RESULT([print -r]) ;; + *) AC_MSG_RESULT([cat]) ;; +esac + +m4_ifdef([_AS_DETECT_SUGGESTED], +[_AS_DETECT_SUGGESTED([ + test -n "${ZSH_VERSION+set}${BASH_VERSION+set}" || ( + ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' + ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO + ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO + PATH=/empty FPATH=/empty; export PATH FPATH + test "X`printf %s $ECHO`" = "X$ECHO" \ + || test "X`print -r -- $ECHO`" = "X$ECHO" )])]) + +_LT_DECL([], [SHELL], [1], [Shell to use when invoking shell scripts]) +_LT_DECL([], [ECHO], [1], [An echo program that protects backslashes]) +])# _LT_PROG_ECHO_BACKSLASH + + +# _LT_WITH_SYSROOT +# ---------------- +AC_DEFUN([_LT_WITH_SYSROOT], +[AC_MSG_CHECKING([for sysroot]) +AC_ARG_WITH([sysroot], +[ --with-sysroot[=DIR] Search for dependent libraries within DIR + (or the compiler's sysroot if not specified).], +[], [with_sysroot=no]) + +dnl lt_sysroot will always be passed unquoted. We quote it here +dnl in case the user passed a directory name. +lt_sysroot= +case ${with_sysroot} in #( + yes) + if test "$GCC" = yes; then + lt_sysroot=`$CC --print-sysroot 2>/dev/null` + fi + ;; #( + /*) + lt_sysroot=`echo "$with_sysroot" | sed -e "$sed_quote_subst"` + ;; #( + no|'') + ;; #( + *) + AC_MSG_RESULT([${with_sysroot}]) + AC_MSG_ERROR([The sysroot must be an absolute path.]) + ;; +esac + + AC_MSG_RESULT([${lt_sysroot:-no}]) +_LT_DECL([], [lt_sysroot], [0], [The root where to search for ]dnl +[dependent libraries, and in which our libraries should be installed.])]) + +# _LT_ENABLE_LOCK +# --------------- +m4_defun([_LT_ENABLE_LOCK], +[AC_ARG_ENABLE([libtool-lock], + [AS_HELP_STRING([--disable-libtool-lock], + [avoid locking (might break parallel builds)])]) +test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes + +# Some flags need to be propagated to the compiler or linker for good +# libtool support. +case $host in +ia64-*-hpux*) + # Find out which ABI we are using. + echo 'int i;' > conftest.$ac_ext + if AC_TRY_EVAL(ac_compile); then + case `/usr/bin/file conftest.$ac_objext` in + *ELF-32*) + HPUX_IA64_MODE="32" + ;; + *ELF-64*) + HPUX_IA64_MODE="64" + ;; + esac + fi + rm -rf conftest* + ;; +*-*-irix6*) + # Find out which ABI we are using. + echo '[#]line '$LINENO' "configure"' > conftest.$ac_ext + if AC_TRY_EVAL(ac_compile); then + if test "$lt_cv_prog_gnu_ld" = yes; then + case `/usr/bin/file conftest.$ac_objext` in + *32-bit*) + LD="${LD-ld} -melf32bsmip" + ;; + *N32*) + LD="${LD-ld} -melf32bmipn32" + ;; + *64-bit*) + LD="${LD-ld} -melf64bmip" + ;; + esac + else + case `/usr/bin/file conftest.$ac_objext` in + *32-bit*) + LD="${LD-ld} -32" + ;; + *N32*) + LD="${LD-ld} -n32" + ;; + *64-bit*) + LD="${LD-ld} -64" + ;; + esac + fi + fi + rm -rf conftest* + ;; + +x86_64-*kfreebsd*-gnu|x86_64-*linux*|ppc*-*linux*|powerpc*-*linux*| \ +s390*-*linux*|s390*-*tpf*|sparc*-*linux*) + # Find out which ABI we are using. + echo 'int i;' > conftest.$ac_ext + if AC_TRY_EVAL(ac_compile); then + case `/usr/bin/file conftest.o` in + *32-bit*) + case $host in + x86_64-*kfreebsd*-gnu) + LD="${LD-ld} -m elf_i386_fbsd" + ;; + x86_64-*linux*) + LD="${LD-ld} -m elf_i386" + ;; + ppc64-*linux*|powerpc64-*linux*) + LD="${LD-ld} -m elf32ppclinux" + ;; + s390x-*linux*) + LD="${LD-ld} -m elf_s390" + ;; + sparc64-*linux*) + LD="${LD-ld} -m elf32_sparc" + ;; + esac + ;; + *64-bit*) + case $host in + x86_64-*kfreebsd*-gnu) + LD="${LD-ld} -m elf_x86_64_fbsd" + ;; + x86_64-*linux*) + LD="${LD-ld} -m elf_x86_64" + ;; + ppc*-*linux*|powerpc*-*linux*) + LD="${LD-ld} -m elf64ppc" + ;; + s390*-*linux*|s390*-*tpf*) + LD="${LD-ld} -m elf64_s390" + ;; + sparc*-*linux*) + LD="${LD-ld} -m elf64_sparc" + ;; + esac + ;; + esac + fi + rm -rf conftest* + ;; + +*-*-sco3.2v5*) + # On SCO OpenServer 5, we need -belf to get full-featured binaries. + SAVE_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -belf" + AC_CACHE_CHECK([whether the C compiler needs -belf], lt_cv_cc_needs_belf, + [AC_LANG_PUSH(C) + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[]])],[lt_cv_cc_needs_belf=yes],[lt_cv_cc_needs_belf=no]) + AC_LANG_POP]) + if test x"$lt_cv_cc_needs_belf" != x"yes"; then + # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf + CFLAGS="$SAVE_CFLAGS" + fi + ;; +*-*solaris*) + # Find out which ABI we are using. + echo 'int i;' > conftest.$ac_ext + if AC_TRY_EVAL(ac_compile); then + case `/usr/bin/file conftest.o` in + *64-bit*) + case $lt_cv_prog_gnu_ld in + yes*) + case $host in + i?86-*-solaris*) + LD="${LD-ld} -m elf_x86_64" + ;; + sparc*-*-solaris*) + LD="${LD-ld} -m elf64_sparc" + ;; + esac + # GNU ld 2.21 introduced _sol2 emulations. Use them if available. + if ${LD-ld} -V | grep _sol2 >/dev/null 2>&1; then + LD="${LD-ld}_sol2" + fi + ;; + *) + if ${LD-ld} -64 -r -o conftest2.o conftest.o >/dev/null 2>&1; then + LD="${LD-ld} -64" + fi + ;; + esac + ;; + esac + fi + rm -rf conftest* + ;; +esac + +need_locks="$enable_libtool_lock" +])# _LT_ENABLE_LOCK + + +# _LT_PROG_AR +# ----------- +m4_defun([_LT_PROG_AR], +[AC_CHECK_TOOLS(AR, [ar], false) +: ${AR=ar} +: ${AR_FLAGS=cru} +_LT_DECL([], [AR], [1], [The archiver]) +_LT_DECL([], [AR_FLAGS], [1], [Flags to create an archive]) + +AC_CACHE_CHECK([for archiver @FILE support], [lt_cv_ar_at_file], + [lt_cv_ar_at_file=no + AC_COMPILE_IFELSE([AC_LANG_PROGRAM], + [echo conftest.$ac_objext > conftest.lst + lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >&AS_MESSAGE_LOG_FD' + AC_TRY_EVAL([lt_ar_try]) + if test "$ac_status" -eq 0; then + # Ensure the archiver fails upon bogus file names. + rm -f conftest.$ac_objext libconftest.a + AC_TRY_EVAL([lt_ar_try]) + if test "$ac_status" -ne 0; then + lt_cv_ar_at_file=@ + fi + fi + rm -f conftest.* libconftest.a + ]) + ]) + +if test "x$lt_cv_ar_at_file" = xno; then + archiver_list_spec= +else + archiver_list_spec=$lt_cv_ar_at_file +fi +_LT_DECL([], [archiver_list_spec], [1], + [How to feed a file listing to the archiver]) +])# _LT_PROG_AR + + +# _LT_CMD_OLD_ARCHIVE +# ------------------- +m4_defun([_LT_CMD_OLD_ARCHIVE], +[_LT_PROG_AR + +AC_CHECK_TOOL(STRIP, strip, :) +test -z "$STRIP" && STRIP=: +_LT_DECL([], [STRIP], [1], [A symbol stripping program]) + +AC_CHECK_TOOL(RANLIB, ranlib, :) +test -z "$RANLIB" && RANLIB=: +_LT_DECL([], [RANLIB], [1], + [Commands used to install an old-style archive]) + +# Determine commands to create old-style static archives. +old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs' +old_postinstall_cmds='chmod 644 $oldlib' +old_postuninstall_cmds= + +if test -n "$RANLIB"; then + case $host_os in + openbsd*) + old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB -t \$tool_oldlib" + ;; + *) + old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB \$tool_oldlib" + ;; + esac + old_archive_cmds="$old_archive_cmds~\$RANLIB \$tool_oldlib" +fi + +case $host_os in + darwin*) + lock_old_archive_extraction=yes ;; + *) + lock_old_archive_extraction=no ;; +esac +_LT_DECL([], [old_postinstall_cmds], [2]) +_LT_DECL([], [old_postuninstall_cmds], [2]) +_LT_TAGDECL([], [old_archive_cmds], [2], + [Commands used to build an old-style archive]) +_LT_DECL([], [lock_old_archive_extraction], [0], + [Whether to use a lock for old archive extraction]) +])# _LT_CMD_OLD_ARCHIVE + + +# _LT_COMPILER_OPTION(MESSAGE, VARIABLE-NAME, FLAGS, +# [OUTPUT-FILE], [ACTION-SUCCESS], [ACTION-FAILURE]) +# ---------------------------------------------------------------- +# Check whether the given compiler option works +AC_DEFUN([_LT_COMPILER_OPTION], +[m4_require([_LT_FILEUTILS_DEFAULTS])dnl +m4_require([_LT_DECL_SED])dnl +AC_CACHE_CHECK([$1], [$2], + [$2=no + m4_if([$4], , [ac_outfile=conftest.$ac_objext], [ac_outfile=$4]) + echo "$lt_simple_compile_test_code" > conftest.$ac_ext + lt_compiler_flag="$3" + # Insert the option either (1) after the last *FLAGS variable, or + # (2) before a word containing "conftest.", or (3) at the end. + # Note that $ac_compile itself does not contain backslashes and begins + # with a dollar sign (not a hyphen), so the echo should work correctly. + # The option is referenced via a variable to avoid confusing sed. + lt_compile=`echo "$ac_compile" | $SED \ + -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \ + -e 's: [[^ ]]*conftest\.: $lt_compiler_flag&:; t' \ + -e 's:$: $lt_compiler_flag:'` + (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&AS_MESSAGE_LOG_FD) + (eval "$lt_compile" 2>conftest.err) + ac_status=$? + cat conftest.err >&AS_MESSAGE_LOG_FD + echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD + if (exit $ac_status) && test -s "$ac_outfile"; then + # The compiler can only warn and ignore the option if not recognized + # So say no if there are warnings other than the usual output. + $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp + $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2 + if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then + $2=yes + fi + fi + $RM conftest* +]) + +if test x"[$]$2" = xyes; then + m4_if([$5], , :, [$5]) +else + m4_if([$6], , :, [$6]) +fi +])# _LT_COMPILER_OPTION + +# Old name: +AU_ALIAS([AC_LIBTOOL_COMPILER_OPTION], [_LT_COMPILER_OPTION]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_LIBTOOL_COMPILER_OPTION], []) + + +# _LT_LINKER_OPTION(MESSAGE, VARIABLE-NAME, FLAGS, +# [ACTION-SUCCESS], [ACTION-FAILURE]) +# ---------------------------------------------------- +# Check whether the given linker option works +AC_DEFUN([_LT_LINKER_OPTION], +[m4_require([_LT_FILEUTILS_DEFAULTS])dnl +m4_require([_LT_DECL_SED])dnl +AC_CACHE_CHECK([$1], [$2], + [$2=no + save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS $3" + echo "$lt_simple_link_test_code" > conftest.$ac_ext + if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then + # The linker can only warn and ignore the option if not recognized + # So say no if there are warnings + if test -s conftest.err; then + # Append any errors to the config.log. + cat conftest.err 1>&AS_MESSAGE_LOG_FD + $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp + $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2 + if diff conftest.exp conftest.er2 >/dev/null; then + $2=yes + fi + else + $2=yes + fi + fi + $RM -r conftest* + LDFLAGS="$save_LDFLAGS" +]) + +if test x"[$]$2" = xyes; then + m4_if([$4], , :, [$4]) +else + m4_if([$5], , :, [$5]) +fi +])# _LT_LINKER_OPTION + +# Old name: +AU_ALIAS([AC_LIBTOOL_LINKER_OPTION], [_LT_LINKER_OPTION]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_LIBTOOL_LINKER_OPTION], []) + + +# LT_CMD_MAX_LEN +#--------------- +AC_DEFUN([LT_CMD_MAX_LEN], +[AC_REQUIRE([AC_CANONICAL_HOST])dnl +# find the maximum length of command line arguments +AC_MSG_CHECKING([the maximum length of command line arguments]) +AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [dnl + i=0 + teststring="ABCD" + + case $build_os in + msdosdjgpp*) + # On DJGPP, this test can blow up pretty badly due to problems in libc + # (any single argument exceeding 2000 bytes causes a buffer overrun + # during glob expansion). Even if it were fixed, the result of this + # check would be larger than it should be. + lt_cv_sys_max_cmd_len=12288; # 12K is about right + ;; + + gnu*) + # Under GNU Hurd, this test is not required because there is + # no limit to the length of command line arguments. + # Libtool will interpret -1 as no limit whatsoever + lt_cv_sys_max_cmd_len=-1; + ;; + + cygwin* | mingw* | cegcc*) + # On Win9x/ME, this test blows up -- it succeeds, but takes + # about 5 minutes as the teststring grows exponentially. + # Worse, since 9x/ME are not pre-emptively multitasking, + # you end up with a "frozen" computer, even though with patience + # the test eventually succeeds (with a max line length of 256k). + # Instead, let's just punt: use the minimum linelength reported by + # all of the supported platforms: 8192 (on NT/2K/XP). + lt_cv_sys_max_cmd_len=8192; + ;; + + mint*) + # On MiNT this can take a long time and run out of memory. + lt_cv_sys_max_cmd_len=8192; + ;; + + amigaos*) + # On AmigaOS with pdksh, this test takes hours, literally. + # So we just punt and use a minimum line length of 8192. + lt_cv_sys_max_cmd_len=8192; + ;; + + netbsd* | freebsd* | openbsd* | darwin* | dragonfly*) + # This has been around since 386BSD, at least. Likely further. + if test -x /sbin/sysctl; then + lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax` + elif test -x /usr/sbin/sysctl; then + lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax` + else + lt_cv_sys_max_cmd_len=65536 # usable default for all BSDs + fi + # And add a safety zone + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` + ;; + + interix*) + # We know the value 262144 and hardcode it with a safety zone (like BSD) + lt_cv_sys_max_cmd_len=196608 + ;; + + os2*) + # The test takes a long time on OS/2. + lt_cv_sys_max_cmd_len=8192 + ;; + + osf*) + # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure + # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not + # nice to cause kernel panics so lets avoid the loop below. + # First set a reasonable default. + lt_cv_sys_max_cmd_len=16384 + # + if test -x /sbin/sysconfig; then + case `/sbin/sysconfig -q proc exec_disable_arg_limit` in + *1*) lt_cv_sys_max_cmd_len=-1 ;; + esac + fi + ;; + sco3.2v5*) + lt_cv_sys_max_cmd_len=102400 + ;; + sysv5* | sco5v6* | sysv4.2uw2*) + kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null` + if test -n "$kargmax"; then + lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[[ ]]//'` + else + lt_cv_sys_max_cmd_len=32768 + fi + ;; + *) + lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null` + if test -n "$lt_cv_sys_max_cmd_len"; then + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` + else + # Make teststring a little bigger before we do anything with it. + # a 1K string should be a reasonable start. + for i in 1 2 3 4 5 6 7 8 ; do + teststring=$teststring$teststring + done + SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}} + # If test is not a shell built-in, we'll probably end up computing a + # maximum length that is only half of the actual maximum length, but + # we can't tell. + while { test "X"`env echo "$teststring$teststring" 2>/dev/null` \ + = "X$teststring$teststring"; } >/dev/null 2>&1 && + test $i != 17 # 1/2 MB should be enough + do + i=`expr $i + 1` + teststring=$teststring$teststring + done + # Only check the string length outside the loop. + lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1` + teststring= + # Add a significant safety factor because C++ compilers can tack on + # massive amounts of additional arguments before passing them to the + # linker. It appears as though 1/2 is a usable value. + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2` + fi + ;; + esac +]) +if test -n $lt_cv_sys_max_cmd_len ; then + AC_MSG_RESULT($lt_cv_sys_max_cmd_len) +else + AC_MSG_RESULT(none) +fi +max_cmd_len=$lt_cv_sys_max_cmd_len +_LT_DECL([], [max_cmd_len], [0], + [What is the maximum length of a command?]) +])# LT_CMD_MAX_LEN + +# Old name: +AU_ALIAS([AC_LIBTOOL_SYS_MAX_CMD_LEN], [LT_CMD_MAX_LEN]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_LIBTOOL_SYS_MAX_CMD_LEN], []) + + +# _LT_HEADER_DLFCN +# ---------------- +m4_defun([_LT_HEADER_DLFCN], +[AC_CHECK_HEADERS([dlfcn.h], [], [], [AC_INCLUDES_DEFAULT])dnl +])# _LT_HEADER_DLFCN + + +# _LT_TRY_DLOPEN_SELF (ACTION-IF-TRUE, ACTION-IF-TRUE-W-USCORE, +# ACTION-IF-FALSE, ACTION-IF-CROSS-COMPILING) +# ---------------------------------------------------------------- +m4_defun([_LT_TRY_DLOPEN_SELF], +[m4_require([_LT_HEADER_DLFCN])dnl +if test "$cross_compiling" = yes; then : + [$4] +else + lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 + lt_status=$lt_dlunknown + cat > conftest.$ac_ext <<_LT_EOF +[#line $LINENO "configure" +#include "confdefs.h" + +#if HAVE_DLFCN_H +#include +#endif + +#include + +#ifdef RTLD_GLOBAL +# define LT_DLGLOBAL RTLD_GLOBAL +#else +# ifdef DL_GLOBAL +# define LT_DLGLOBAL DL_GLOBAL +# else +# define LT_DLGLOBAL 0 +# endif +#endif + +/* We may have to define LT_DLLAZY_OR_NOW in the command line if we + find out it does not work in some platform. */ +#ifndef LT_DLLAZY_OR_NOW +# ifdef RTLD_LAZY +# define LT_DLLAZY_OR_NOW RTLD_LAZY +# else +# ifdef DL_LAZY +# define LT_DLLAZY_OR_NOW DL_LAZY +# else +# ifdef RTLD_NOW +# define LT_DLLAZY_OR_NOW RTLD_NOW +# else +# ifdef DL_NOW +# define LT_DLLAZY_OR_NOW DL_NOW +# else +# define LT_DLLAZY_OR_NOW 0 +# endif +# endif +# endif +# endif +#endif + +/* When -fvisbility=hidden is used, assume the code has been annotated + correspondingly for the symbols needed. */ +#if defined(__GNUC__) && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3)) +int fnord () __attribute__((visibility("default"))); +#endif + +int fnord () { return 42; } +int main () +{ + void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW); + int status = $lt_dlunknown; + + if (self) + { + if (dlsym (self,"fnord")) status = $lt_dlno_uscore; + else + { + if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore; + else puts (dlerror ()); + } + /* dlclose (self); */ + } + else + puts (dlerror ()); + + return status; +}] +_LT_EOF + if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext} 2>/dev/null; then + (./conftest; exit; ) >&AS_MESSAGE_LOG_FD 2>/dev/null + lt_status=$? + case x$lt_status in + x$lt_dlno_uscore) $1 ;; + x$lt_dlneed_uscore) $2 ;; + x$lt_dlunknown|x*) $3 ;; + esac + else : + # compilation failed + $3 + fi +fi +rm -fr conftest* +])# _LT_TRY_DLOPEN_SELF + + +# LT_SYS_DLOPEN_SELF +# ------------------ +AC_DEFUN([LT_SYS_DLOPEN_SELF], +[m4_require([_LT_HEADER_DLFCN])dnl +if test "x$enable_dlopen" != xyes; then + enable_dlopen=unknown + enable_dlopen_self=unknown + enable_dlopen_self_static=unknown +else + lt_cv_dlopen=no + lt_cv_dlopen_libs= + + case $host_os in + beos*) + lt_cv_dlopen="load_add_on" + lt_cv_dlopen_libs= + lt_cv_dlopen_self=yes + ;; + + mingw* | pw32* | cegcc*) + lt_cv_dlopen="LoadLibrary" + lt_cv_dlopen_libs= + ;; + + cygwin*) + lt_cv_dlopen="dlopen" + lt_cv_dlopen_libs= + ;; + + darwin*) + # if libdl is installed we need to link against it + AC_CHECK_LIB([dl], [dlopen], + [lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"],[ + lt_cv_dlopen="dyld" + lt_cv_dlopen_libs= + lt_cv_dlopen_self=yes + ]) + ;; + + *) + AC_CHECK_FUNC([shl_load], + [lt_cv_dlopen="shl_load"], + [AC_CHECK_LIB([dld], [shl_load], + [lt_cv_dlopen="shl_load" lt_cv_dlopen_libs="-ldld"], + [AC_CHECK_FUNC([dlopen], + [lt_cv_dlopen="dlopen"], + [AC_CHECK_LIB([dl], [dlopen], + [lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"], + [AC_CHECK_LIB([svld], [dlopen], + [lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-lsvld"], + [AC_CHECK_LIB([dld], [dld_link], + [lt_cv_dlopen="dld_link" lt_cv_dlopen_libs="-ldld"]) + ]) + ]) + ]) + ]) + ]) + ;; + esac + + if test "x$lt_cv_dlopen" != xno; then + enable_dlopen=yes + else + enable_dlopen=no + fi + + case $lt_cv_dlopen in + dlopen) + save_CPPFLAGS="$CPPFLAGS" + test "x$ac_cv_header_dlfcn_h" = xyes && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H" + + save_LDFLAGS="$LDFLAGS" + wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\" + + save_LIBS="$LIBS" + LIBS="$lt_cv_dlopen_libs $LIBS" + + AC_CACHE_CHECK([whether a program can dlopen itself], + lt_cv_dlopen_self, [dnl + _LT_TRY_DLOPEN_SELF( + lt_cv_dlopen_self=yes, lt_cv_dlopen_self=yes, + lt_cv_dlopen_self=no, lt_cv_dlopen_self=cross) + ]) + + if test "x$lt_cv_dlopen_self" = xyes; then + wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\" + AC_CACHE_CHECK([whether a statically linked program can dlopen itself], + lt_cv_dlopen_self_static, [dnl + _LT_TRY_DLOPEN_SELF( + lt_cv_dlopen_self_static=yes, lt_cv_dlopen_self_static=yes, + lt_cv_dlopen_self_static=no, lt_cv_dlopen_self_static=cross) + ]) + fi + + CPPFLAGS="$save_CPPFLAGS" + LDFLAGS="$save_LDFLAGS" + LIBS="$save_LIBS" + ;; + esac + + case $lt_cv_dlopen_self in + yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;; + *) enable_dlopen_self=unknown ;; + esac + + case $lt_cv_dlopen_self_static in + yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;; + *) enable_dlopen_self_static=unknown ;; + esac +fi +_LT_DECL([dlopen_support], [enable_dlopen], [0], + [Whether dlopen is supported]) +_LT_DECL([dlopen_self], [enable_dlopen_self], [0], + [Whether dlopen of programs is supported]) +_LT_DECL([dlopen_self_static], [enable_dlopen_self_static], [0], + [Whether dlopen of statically linked programs is supported]) +])# LT_SYS_DLOPEN_SELF + +# Old name: +AU_ALIAS([AC_LIBTOOL_DLOPEN_SELF], [LT_SYS_DLOPEN_SELF]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_LIBTOOL_DLOPEN_SELF], []) + + +# _LT_COMPILER_C_O([TAGNAME]) +# --------------------------- +# Check to see if options -c and -o are simultaneously supported by compiler. +# This macro does not hard code the compiler like AC_PROG_CC_C_O. +m4_defun([_LT_COMPILER_C_O], +[m4_require([_LT_DECL_SED])dnl +m4_require([_LT_FILEUTILS_DEFAULTS])dnl +m4_require([_LT_TAG_COMPILER])dnl +AC_CACHE_CHECK([if $compiler supports -c -o file.$ac_objext], + [_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)], + [_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=no + $RM -r conftest 2>/dev/null + mkdir conftest + cd conftest + mkdir out + echo "$lt_simple_compile_test_code" > conftest.$ac_ext + + lt_compiler_flag="-o out/conftest2.$ac_objext" + # Insert the option either (1) after the last *FLAGS variable, or + # (2) before a word containing "conftest.", or (3) at the end. + # Note that $ac_compile itself does not contain backslashes and begins + # with a dollar sign (not a hyphen), so the echo should work correctly. + lt_compile=`echo "$ac_compile" | $SED \ + -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \ + -e 's: [[^ ]]*conftest\.: $lt_compiler_flag&:; t' \ + -e 's:$: $lt_compiler_flag:'` + (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&AS_MESSAGE_LOG_FD) + (eval "$lt_compile" 2>out/conftest.err) + ac_status=$? + cat out/conftest.err >&AS_MESSAGE_LOG_FD + echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD + if (exit $ac_status) && test -s out/conftest2.$ac_objext + then + # The compiler can only warn and ignore the option if not recognized + # So say no if there are warnings + $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp + $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2 + if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then + _LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=yes + fi + fi + chmod u+w . 2>&AS_MESSAGE_LOG_FD + $RM conftest* + # SGI C++ compiler will create directory out/ii_files/ for + # template instantiation + test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files + $RM out/* && rmdir out + cd .. + $RM -r conftest + $RM conftest* +]) +_LT_TAGDECL([compiler_c_o], [lt_cv_prog_compiler_c_o], [1], + [Does compiler simultaneously support -c and -o options?]) +])# _LT_COMPILER_C_O + + +# _LT_COMPILER_FILE_LOCKS([TAGNAME]) +# ---------------------------------- +# Check to see if we can do hard links to lock some files if needed +m4_defun([_LT_COMPILER_FILE_LOCKS], +[m4_require([_LT_ENABLE_LOCK])dnl +m4_require([_LT_FILEUTILS_DEFAULTS])dnl +_LT_COMPILER_C_O([$1]) + +hard_links="nottested" +if test "$_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)" = no && test "$need_locks" != no; then + # do not overwrite the value of need_locks provided by the user + AC_MSG_CHECKING([if we can lock with hard links]) + hard_links=yes + $RM conftest* + ln conftest.a conftest.b 2>/dev/null && hard_links=no + touch conftest.a + ln conftest.a conftest.b 2>&5 || hard_links=no + ln conftest.a conftest.b 2>/dev/null && hard_links=no + AC_MSG_RESULT([$hard_links]) + if test "$hard_links" = no; then + AC_MSG_WARN([`$CC' does not support `-c -o', so `make -j' may be unsafe]) + need_locks=warn + fi +else + need_locks=no +fi +_LT_DECL([], [need_locks], [1], [Must we lock files when doing compilation?]) +])# _LT_COMPILER_FILE_LOCKS + + +# _LT_CHECK_OBJDIR +# ---------------- +m4_defun([_LT_CHECK_OBJDIR], +[AC_CACHE_CHECK([for objdir], [lt_cv_objdir], +[rm -f .libs 2>/dev/null +mkdir .libs 2>/dev/null +if test -d .libs; then + lt_cv_objdir=.libs +else + # MS-DOS does not allow filenames that begin with a dot. + lt_cv_objdir=_libs +fi +rmdir .libs 2>/dev/null]) +objdir=$lt_cv_objdir +_LT_DECL([], [objdir], [0], + [The name of the directory that contains temporary libtool files])dnl +m4_pattern_allow([LT_OBJDIR])dnl +AC_DEFINE_UNQUOTED(LT_OBJDIR, "$lt_cv_objdir/", + [Define to the sub-directory in which libtool stores uninstalled libraries.]) +])# _LT_CHECK_OBJDIR + + +# _LT_LINKER_HARDCODE_LIBPATH([TAGNAME]) +# -------------------------------------- +# Check hardcoding attributes. +m4_defun([_LT_LINKER_HARDCODE_LIBPATH], +[AC_MSG_CHECKING([how to hardcode library paths into programs]) +_LT_TAGVAR(hardcode_action, $1)= +if test -n "$_LT_TAGVAR(hardcode_libdir_flag_spec, $1)" || + test -n "$_LT_TAGVAR(runpath_var, $1)" || + test "X$_LT_TAGVAR(hardcode_automatic, $1)" = "Xyes" ; then + + # We can hardcode non-existent directories. + if test "$_LT_TAGVAR(hardcode_direct, $1)" != no && + # If the only mechanism to avoid hardcoding is shlibpath_var, we + # have to relink, otherwise we might link with an installed library + # when we should be linking with a yet-to-be-installed one + ## test "$_LT_TAGVAR(hardcode_shlibpath_var, $1)" != no && + test "$_LT_TAGVAR(hardcode_minus_L, $1)" != no; then + # Linking always hardcodes the temporary library directory. + _LT_TAGVAR(hardcode_action, $1)=relink + else + # We can link without hardcoding, and we can hardcode nonexisting dirs. + _LT_TAGVAR(hardcode_action, $1)=immediate + fi +else + # We cannot hardcode anything, or else we can only hardcode existing + # directories. + _LT_TAGVAR(hardcode_action, $1)=unsupported +fi +AC_MSG_RESULT([$_LT_TAGVAR(hardcode_action, $1)]) + +if test "$_LT_TAGVAR(hardcode_action, $1)" = relink || + test "$_LT_TAGVAR(inherit_rpath, $1)" = yes; then + # Fast installation is not supported + enable_fast_install=no +elif test "$shlibpath_overrides_runpath" = yes || + test "$enable_shared" = no; then + # Fast installation is not necessary + enable_fast_install=needless +fi +_LT_TAGDECL([], [hardcode_action], [0], + [How to hardcode a shared library path into an executable]) +])# _LT_LINKER_HARDCODE_LIBPATH + + +# _LT_CMD_STRIPLIB +# ---------------- +m4_defun([_LT_CMD_STRIPLIB], +[m4_require([_LT_DECL_EGREP]) +striplib= +old_striplib= +AC_MSG_CHECKING([whether stripping libraries is possible]) +if test -n "$STRIP" && $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then + test -z "$old_striplib" && old_striplib="$STRIP --strip-debug" + test -z "$striplib" && striplib="$STRIP --strip-unneeded" + AC_MSG_RESULT([yes]) +else +# FIXME - insert some real tests, host_os isn't really good enough + case $host_os in + darwin*) + if test -n "$STRIP" ; then + striplib="$STRIP -x" + old_striplib="$STRIP -S" + AC_MSG_RESULT([yes]) + else + AC_MSG_RESULT([no]) + fi + ;; + *) + AC_MSG_RESULT([no]) + ;; + esac +fi +_LT_DECL([], [old_striplib], [1], [Commands to strip libraries]) +_LT_DECL([], [striplib], [1]) +])# _LT_CMD_STRIPLIB + + +# _LT_SYS_DYNAMIC_LINKER([TAG]) +# ----------------------------- +# PORTME Fill in your ld.so characteristics +m4_defun([_LT_SYS_DYNAMIC_LINKER], +[AC_REQUIRE([AC_CANONICAL_HOST])dnl +m4_require([_LT_DECL_EGREP])dnl +m4_require([_LT_FILEUTILS_DEFAULTS])dnl +m4_require([_LT_DECL_OBJDUMP])dnl +m4_require([_LT_DECL_SED])dnl +m4_require([_LT_CHECK_SHELL_FEATURES])dnl +AC_MSG_CHECKING([dynamic linker characteristics]) +m4_if([$1], + [], [ +if test "$GCC" = yes; then + case $host_os in + darwin*) lt_awk_arg="/^libraries:/,/LR/" ;; + *) lt_awk_arg="/^libraries:/" ;; + esac + case $host_os in + mingw* | cegcc*) lt_sed_strip_eq="s,=\([[A-Za-z]]:\),\1,g" ;; + *) lt_sed_strip_eq="s,=/,/,g" ;; + esac + lt_search_path_spec=`$CC -print-search-dirs | awk $lt_awk_arg | $SED -e "s/^libraries://" -e $lt_sed_strip_eq` + case $lt_search_path_spec in + *\;*) + # if the path contains ";" then we assume it to be the separator + # otherwise default to the standard path separator (i.e. ":") - it is + # assumed that no part of a normal pathname contains ";" but that should + # okay in the real world where ";" in dirpaths is itself problematic. + lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED 's/;/ /g'` + ;; + *) + lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED "s/$PATH_SEPARATOR/ /g"` + ;; + esac + # Ok, now we have the path, separated by spaces, we can step through it + # and add multilib dir if necessary. + lt_tmp_lt_search_path_spec= + lt_multi_os_dir=`$CC $CPPFLAGS $CFLAGS $LDFLAGS -print-multi-os-directory 2>/dev/null` + for lt_sys_path in $lt_search_path_spec; do + if test -d "$lt_sys_path/$lt_multi_os_dir"; then + lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path/$lt_multi_os_dir" + else + test -d "$lt_sys_path" && \ + lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path" + fi + done + lt_search_path_spec=`$ECHO "$lt_tmp_lt_search_path_spec" | awk ' +BEGIN {RS=" "; FS="/|\n";} { + lt_foo=""; + lt_count=0; + for (lt_i = NF; lt_i > 0; lt_i--) { + if ($lt_i != "" && $lt_i != ".") { + if ($lt_i == "..") { + lt_count++; + } else { + if (lt_count == 0) { + lt_foo="/" $lt_i lt_foo; + } else { + lt_count--; + } + } + } + } + if (lt_foo != "") { lt_freq[[lt_foo]]++; } + if (lt_freq[[lt_foo]] == 1) { print lt_foo; } +}'` + # AWK program above erroneously prepends '/' to C:/dos/paths + # for these hosts. + case $host_os in + mingw* | cegcc*) lt_search_path_spec=`$ECHO "$lt_search_path_spec" |\ + $SED 's,/\([[A-Za-z]]:\),\1,g'` ;; + esac + sys_lib_search_path_spec=`$ECHO "$lt_search_path_spec" | $lt_NL2SP` +else + sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib" +fi]) +library_names_spec= +libname_spec='lib$name' +soname_spec= +shrext_cmds=".so" +postinstall_cmds= +postuninstall_cmds= +finish_cmds= +finish_eval= +shlibpath_var= +shlibpath_overrides_runpath=unknown +version_type=none +dynamic_linker="$host_os ld.so" +sys_lib_dlsearch_path_spec="/lib /usr/lib" +need_lib_prefix=unknown +hardcode_into_libs=no + +# when you set need_version to no, make sure it does not cause -set_version +# flags to be left without arguments +need_version=unknown + +case $host_os in +aix3*) + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='${libname}${release}${shared_ext}$versuffix $libname.a' + shlibpath_var=LIBPATH + + # AIX 3 has no versioning support, so we append a major version to the name. + soname_spec='${libname}${release}${shared_ext}$major' + ;; + +aix[[4-9]]*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + hardcode_into_libs=yes + if test "$host_cpu" = ia64; then + # AIX 5 supports IA64 + library_names_spec='${libname}${release}${shared_ext}$major ${libname}${release}${shared_ext}$versuffix $libname${shared_ext}' + shlibpath_var=LD_LIBRARY_PATH + else + # With GCC up to 2.95.x, collect2 would create an import file + # for dependence libraries. The import file would start with + # the line `#! .'. This would cause the generated library to + # depend on `.', always an invalid library. This was fixed in + # development snapshots of GCC prior to 3.0. + case $host_os in + aix4 | aix4.[[01]] | aix4.[[01]].*) + if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)' + echo ' yes ' + echo '#endif'; } | ${CC} -E - | $GREP yes > /dev/null; then + : + else + can_build_shared=no + fi + ;; + esac + # AIX (on Power*) has no versioning support, so currently we can not hardcode correct + # soname into executable. Probably we can add versioning support to + # collect2, so additional links can be useful in future. + if test "$aix_use_runtimelinking" = yes; then + # If using run time linking (on AIX 4.2 or later) use lib.so + # instead of lib.a to let people know that these are not + # typical AIX shared libraries. + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + else + # We preserve .a as extension for shared libraries through AIX4.2 + # and later when we are not doing run time linking. + library_names_spec='${libname}${release}.a $libname.a' + soname_spec='${libname}${release}${shared_ext}$major' + fi + shlibpath_var=LIBPATH + fi + ;; + +amigaos*) + case $host_cpu in + powerpc) + # Since July 2007 AmigaOS4 officially supports .so libraries. + # When compiling the executable, add -use-dynld -Lsobjs: to the compileline. + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + ;; + m68k) + library_names_spec='$libname.ixlibrary $libname.a' + # Create ${libname}_ixlibrary.a entries in /sys/libs. + finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`func_echo_all "$lib" | $SED '\''s%^.*/\([[^/]]*\)\.ixlibrary$%\1%'\''`; test $RM /sys/libs/${libname}_ixlibrary.a; $show "cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a"; cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a || exit 1; done' + ;; + esac + ;; + +beos*) + library_names_spec='${libname}${shared_ext}' + dynamic_linker="$host_os ld.so" + shlibpath_var=LIBRARY_PATH + ;; + +bsdi[[45]]*) + version_type=linux # correct to gnu/linux during the next big refactor + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir' + shlibpath_var=LD_LIBRARY_PATH + sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib" + sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib" + # the default ld.so.conf also contains /usr/contrib/lib and + # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow + # libtool to hard-code these into programs + ;; + +cygwin* | mingw* | pw32* | cegcc*) + version_type=windows + shrext_cmds=".dll" + need_version=no + need_lib_prefix=no + + case $GCC,$cc_basename in + yes,*) + # gcc + library_names_spec='$libname.dll.a' + # DLL is installed to $(libdir)/../bin by postinstall_cmds + postinstall_cmds='base_file=`basename \${file}`~ + dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\${base_file}'\''i; echo \$dlname'\''`~ + dldir=$destdir/`dirname \$dlpath`~ + test -d \$dldir || mkdir -p \$dldir~ + $install_prog $dir/$dlname \$dldir/$dlname~ + chmod a+x \$dldir/$dlname~ + if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then + eval '\''$striplib \$dldir/$dlname'\'' || exit \$?; + fi' + postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~ + dlpath=$dir/\$dldll~ + $RM \$dlpath' + shlibpath_overrides_runpath=yes + + case $host_os in + cygwin*) + # Cygwin DLLs use 'cyg' prefix rather than 'lib' + soname_spec='`echo ${libname} | sed -e 's/^lib/cyg/'``echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext}' +m4_if([$1], [],[ + sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/lib/w32api"]) + ;; + mingw* | cegcc*) + # MinGW DLLs use traditional 'lib' prefix + soname_spec='${libname}`echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext}' + ;; + pw32*) + # pw32 DLLs use 'pw' prefix rather than 'lib' + library_names_spec='`echo ${libname} | sed -e 's/^lib/pw/'``echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext}' + ;; + esac + dynamic_linker='Win32 ld.exe' + ;; + + *,cl*) + # Native MSVC + libname_spec='$name' + soname_spec='${libname}`echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext}' + library_names_spec='${libname}.dll.lib' + + case $build_os in + mingw*) + sys_lib_search_path_spec= + lt_save_ifs=$IFS + IFS=';' + for lt_path in $LIB + do + IFS=$lt_save_ifs + # Let DOS variable expansion print the short 8.3 style file name. + lt_path=`cd "$lt_path" 2>/dev/null && cmd //C "for %i in (".") do @echo %~si"` + sys_lib_search_path_spec="$sys_lib_search_path_spec $lt_path" + done + IFS=$lt_save_ifs + # Convert to MSYS style. + sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | sed -e 's|\\\\|/|g' -e 's| \\([[a-zA-Z]]\\):| /\\1|g' -e 's|^ ||'` + ;; + cygwin*) + # Convert to unix form, then to dos form, then back to unix form + # but this time dos style (no spaces!) so that the unix form looks + # like /cygdrive/c/PROGRA~1:/cygdr... + sys_lib_search_path_spec=`cygpath --path --unix "$LIB"` + sys_lib_search_path_spec=`cygpath --path --dos "$sys_lib_search_path_spec" 2>/dev/null` + sys_lib_search_path_spec=`cygpath --path --unix "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"` + ;; + *) + sys_lib_search_path_spec="$LIB" + if $ECHO "$sys_lib_search_path_spec" | [$GREP ';[c-zC-Z]:/' >/dev/null]; then + # It is most probably a Windows format PATH. + sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e 's/;/ /g'` + else + sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"` + fi + # FIXME: find the short name or the path components, as spaces are + # common. (e.g. "Program Files" -> "PROGRA~1") + ;; + esac + + # DLL is installed to $(libdir)/../bin by postinstall_cmds + postinstall_cmds='base_file=`basename \${file}`~ + dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\${base_file}'\''i; echo \$dlname'\''`~ + dldir=$destdir/`dirname \$dlpath`~ + test -d \$dldir || mkdir -p \$dldir~ + $install_prog $dir/$dlname \$dldir/$dlname' + postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~ + dlpath=$dir/\$dldll~ + $RM \$dlpath' + shlibpath_overrides_runpath=yes + dynamic_linker='Win32 link.exe' + ;; + + *) + # Assume MSVC wrapper + library_names_spec='${libname}`echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext} $libname.lib' + dynamic_linker='Win32 ld.exe' + ;; + esac + # FIXME: first we should search . and the directory the executable is in + shlibpath_var=PATH + ;; + +darwin* | rhapsody*) + dynamic_linker="$host_os dyld" + version_type=darwin + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${major}$shared_ext ${libname}$shared_ext' + soname_spec='${libname}${release}${major}$shared_ext' + shlibpath_overrides_runpath=yes + shlibpath_var=DYLD_LIBRARY_PATH + shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`' +m4_if([$1], [],[ + sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/local/lib"]) + sys_lib_dlsearch_path_spec='/usr/local/lib /lib /usr/lib' + ;; + +dgux*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname$shared_ext' + soname_spec='${libname}${release}${shared_ext}$major' + shlibpath_var=LD_LIBRARY_PATH + ;; + +freebsd* | dragonfly*) + # DragonFly does not have aout. When/if they implement a new + # versioning mechanism, adjust this. + if test -x /usr/bin/objformat; then + objformat=`/usr/bin/objformat` + else + case $host_os in + freebsd[[23]].*) objformat=aout ;; + *) objformat=elf ;; + esac + fi + version_type=freebsd-$objformat + case $version_type in + freebsd-elf*) + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext} $libname${shared_ext}' + need_version=no + need_lib_prefix=no + ;; + freebsd-*) + library_names_spec='${libname}${release}${shared_ext}$versuffix $libname${shared_ext}$versuffix' + need_version=yes + ;; + esac + shlibpath_var=LD_LIBRARY_PATH + case $host_os in + freebsd2.*) + shlibpath_overrides_runpath=yes + ;; + freebsd3.[[01]]* | freebsdelf3.[[01]]*) + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + ;; + freebsd3.[[2-9]]* | freebsdelf3.[[2-9]]* | \ + freebsd4.[[0-5]] | freebsdelf4.[[0-5]] | freebsd4.1.1 | freebsdelf4.1.1) + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + ;; + *) # from 4.6 on, and DragonFly + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + ;; + esac + ;; + +gnu*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}${major} ${libname}${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + ;; + +haiku*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + dynamic_linker="$host_os runtime_loader" + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}${major} ${libname}${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + shlibpath_var=LIBRARY_PATH + shlibpath_overrides_runpath=yes + sys_lib_dlsearch_path_spec='/boot/home/config/lib /boot/common/lib /boot/system/lib' + hardcode_into_libs=yes + ;; + +hpux9* | hpux10* | hpux11*) + # Give a soname corresponding to the major version so that dld.sl refuses to + # link against other versions. + version_type=sunos + need_lib_prefix=no + need_version=no + case $host_cpu in + ia64*) + shrext_cmds='.so' + hardcode_into_libs=yes + dynamic_linker="$host_os dld.so" + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes # Unless +noenvvar is specified. + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + if test "X$HPUX_IA64_MODE" = X32; then + sys_lib_search_path_spec="/usr/lib/hpux32 /usr/local/lib/hpux32 /usr/local/lib" + else + sys_lib_search_path_spec="/usr/lib/hpux64 /usr/local/lib/hpux64" + fi + sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec + ;; + hppa*64*) + shrext_cmds='.sl' + hardcode_into_libs=yes + dynamic_linker="$host_os dld.sl" + shlibpath_var=LD_LIBRARY_PATH # How should we handle SHLIB_PATH + shlibpath_overrides_runpath=yes # Unless +noenvvar is specified. + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + sys_lib_search_path_spec="/usr/lib/pa20_64 /usr/ccs/lib/pa20_64" + sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec + ;; + *) + shrext_cmds='.sl' + dynamic_linker="$host_os dld.sl" + shlibpath_var=SHLIB_PATH + shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + ;; + esac + # HP-UX runs *really* slowly unless shared libraries are mode 555, ... + postinstall_cmds='chmod 555 $lib' + # or fails outright, so override atomically: + install_override_mode=555 + ;; + +interix[[3-9]]*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + ;; + +irix5* | irix6* | nonstopux*) + case $host_os in + nonstopux*) version_type=nonstopux ;; + *) + if test "$lt_cv_prog_gnu_ld" = yes; then + version_type=linux # correct to gnu/linux during the next big refactor + else + version_type=irix + fi ;; + esac + need_lib_prefix=no + need_version=no + soname_spec='${libname}${release}${shared_ext}$major' + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${release}${shared_ext} $libname${shared_ext}' + case $host_os in + irix5* | nonstopux*) + libsuff= shlibsuff= + ;; + *) + case $LD in # libtool.m4 will add one of these switches to LD + *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ") + libsuff= shlibsuff= libmagic=32-bit;; + *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ") + libsuff=32 shlibsuff=N32 libmagic=N32;; + *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ") + libsuff=64 shlibsuff=64 libmagic=64-bit;; + *) libsuff= shlibsuff= libmagic=never-match;; + esac + ;; + esac + shlibpath_var=LD_LIBRARY${shlibsuff}_PATH + shlibpath_overrides_runpath=no + sys_lib_search_path_spec="/usr/lib${libsuff} /lib${libsuff} /usr/local/lib${libsuff}" + sys_lib_dlsearch_path_spec="/usr/lib${libsuff} /lib${libsuff}" + hardcode_into_libs=yes + ;; + +# No shared lib support for Linux oldld, aout, or coff. +linux*oldld* | linux*aout* | linux*coff*) + dynamic_linker=no + ;; + +# This must be glibc/ELF. +linux* | k*bsd*-gnu | kopensolaris*-gnu) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + + # Some binutils ld are patched to set DT_RUNPATH + AC_CACHE_VAL([lt_cv_shlibpath_overrides_runpath], + [lt_cv_shlibpath_overrides_runpath=no + save_LDFLAGS=$LDFLAGS + save_libdir=$libdir + eval "libdir=/foo; wl=\"$_LT_TAGVAR(lt_prog_compiler_wl, $1)\"; \ + LDFLAGS=\"\$LDFLAGS $_LT_TAGVAR(hardcode_libdir_flag_spec, $1)\"" + AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])], + [AS_IF([ ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null], + [lt_cv_shlibpath_overrides_runpath=yes])]) + LDFLAGS=$save_LDFLAGS + libdir=$save_libdir + ]) + shlibpath_overrides_runpath=$lt_cv_shlibpath_overrides_runpath + + # This implies no fast_install, which is unacceptable. + # Some rework will be needed to allow for fast_install + # before this can be enabled. + hardcode_into_libs=yes + + # Append ld.so.conf contents to the search path + if test -f /etc/ld.so.conf; then + lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \[$]2)); skip = 1; } { if (!skip) print \[$]0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[ ]*hwcap[ ]/d;s/[:, ]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;s/"//g;/^$/d' | tr '\n' ' '` + sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra" + fi + + # We used to test for /lib/ld.so.1 and disable shared libraries on + # powerpc, because MkLinux only supported shared libraries with the + # GNU dynamic linker. Since this was broken with cross compilers, + # most powerpc-linux boxes support dynamic linking these days and + # people can always --disable-shared, the test was removed, and we + # assume the GNU/Linux dynamic linker is in use. + dynamic_linker='GNU/Linux ld.so' + ;; + +netbsd*) + version_type=sunos + need_lib_prefix=no + need_version=no + if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix' + finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir' + dynamic_linker='NetBSD (a.out) ld.so' + else + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + dynamic_linker='NetBSD ld.elf_so' + fi + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + ;; + +newsos6) + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + ;; + +*nto* | *qnx*) + version_type=qnx + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + dynamic_linker='ldqnx.so' + ;; + +openbsd*) + version_type=sunos + sys_lib_dlsearch_path_spec="/usr/lib" + need_lib_prefix=no + # Some older versions of OpenBSD (3.3 at least) *do* need versioned libs. + case $host_os in + openbsd3.3 | openbsd3.3.*) need_version=yes ;; + *) need_version=no ;; + esac + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix' + finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir' + shlibpath_var=LD_LIBRARY_PATH + if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then + case $host_os in + openbsd2.[[89]] | openbsd2.[[89]].*) + shlibpath_overrides_runpath=no + ;; + *) + shlibpath_overrides_runpath=yes + ;; + esac + else + shlibpath_overrides_runpath=yes + fi + ;; + +os2*) + libname_spec='$name' + shrext_cmds=".dll" + need_lib_prefix=no + library_names_spec='$libname${shared_ext} $libname.a' + dynamic_linker='OS/2 ld.exe' + shlibpath_var=LIBPATH + ;; + +osf3* | osf4* | osf5*) + version_type=osf + need_lib_prefix=no + need_version=no + soname_spec='${libname}${release}${shared_ext}$major' + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + shlibpath_var=LD_LIBRARY_PATH + sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib" + sys_lib_dlsearch_path_spec="$sys_lib_search_path_spec" + ;; + +rdos*) + dynamic_linker=no + ;; + +solaris*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + # ldd complains unless libraries are executable + postinstall_cmds='chmod +x $lib' + ;; + +sunos4*) + version_type=sunos + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix' + finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + if test "$with_gnu_ld" = yes; then + need_lib_prefix=no + fi + need_version=yes + ;; + +sysv4 | sysv4.3*) + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + shlibpath_var=LD_LIBRARY_PATH + case $host_vendor in + sni) + shlibpath_overrides_runpath=no + need_lib_prefix=no + runpath_var=LD_RUN_PATH + ;; + siemens) + need_lib_prefix=no + ;; + motorola) + need_lib_prefix=no + need_version=no + shlibpath_overrides_runpath=no + sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib' + ;; + esac + ;; + +sysv4*MP*) + if test -d /usr/nec ;then + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='$libname${shared_ext}.$versuffix $libname${shared_ext}.$major $libname${shared_ext}' + soname_spec='$libname${shared_ext}.$major' + shlibpath_var=LD_LIBRARY_PATH + fi + ;; + +sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) + version_type=freebsd-elf + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext} $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + if test "$with_gnu_ld" = yes; then + sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib' + else + sys_lib_search_path_spec='/usr/ccs/lib /usr/lib' + case $host_os in + sco3.2v5*) + sys_lib_search_path_spec="$sys_lib_search_path_spec /lib" + ;; + esac + fi + sys_lib_dlsearch_path_spec='/usr/lib' + ;; + +tpf*) + # TPF is a cross-target only. Preferred cross-host = GNU/Linux. + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + ;; + +uts4*) + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' + soname_spec='${libname}${release}${shared_ext}$major' + shlibpath_var=LD_LIBRARY_PATH + ;; + +*) + dynamic_linker=no + ;; +esac +AC_MSG_RESULT([$dynamic_linker]) +test "$dynamic_linker" = no && can_build_shared=no + +variables_saved_for_relink="PATH $shlibpath_var $runpath_var" +if test "$GCC" = yes; then + variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH" +fi + +if test "${lt_cv_sys_lib_search_path_spec+set}" = set; then + sys_lib_search_path_spec="$lt_cv_sys_lib_search_path_spec" +fi +if test "${lt_cv_sys_lib_dlsearch_path_spec+set}" = set; then + sys_lib_dlsearch_path_spec="$lt_cv_sys_lib_dlsearch_path_spec" +fi + +_LT_DECL([], [variables_saved_for_relink], [1], + [Variables whose values should be saved in libtool wrapper scripts and + restored at link time]) +_LT_DECL([], [need_lib_prefix], [0], + [Do we need the "lib" prefix for modules?]) +_LT_DECL([], [need_version], [0], [Do we need a version for libraries?]) +_LT_DECL([], [version_type], [0], [Library versioning type]) +_LT_DECL([], [runpath_var], [0], [Shared library runtime path variable]) +_LT_DECL([], [shlibpath_var], [0],[Shared library path variable]) +_LT_DECL([], [shlibpath_overrides_runpath], [0], + [Is shlibpath searched before the hard-coded library search path?]) +_LT_DECL([], [libname_spec], [1], [Format of library name prefix]) +_LT_DECL([], [library_names_spec], [1], + [[List of archive names. First name is the real one, the rest are links. + The last name is the one that the linker finds with -lNAME]]) +_LT_DECL([], [soname_spec], [1], + [[The coded name of the library, if different from the real name]]) +_LT_DECL([], [install_override_mode], [1], + [Permission mode override for installation of shared libraries]) +_LT_DECL([], [postinstall_cmds], [2], + [Command to use after installation of a shared archive]) +_LT_DECL([], [postuninstall_cmds], [2], + [Command to use after uninstallation of a shared archive]) +_LT_DECL([], [finish_cmds], [2], + [Commands used to finish a libtool library installation in a directory]) +_LT_DECL([], [finish_eval], [1], + [[As "finish_cmds", except a single script fragment to be evaled but + not shown]]) +_LT_DECL([], [hardcode_into_libs], [0], + [Whether we should hardcode library paths into libraries]) +_LT_DECL([], [sys_lib_search_path_spec], [2], + [Compile-time system search path for libraries]) +_LT_DECL([], [sys_lib_dlsearch_path_spec], [2], + [Run-time system search path for libraries]) +])# _LT_SYS_DYNAMIC_LINKER + + +# _LT_PATH_TOOL_PREFIX(TOOL) +# -------------------------- +# find a file program which can recognize shared library +AC_DEFUN([_LT_PATH_TOOL_PREFIX], +[m4_require([_LT_DECL_EGREP])dnl +AC_MSG_CHECKING([for $1]) +AC_CACHE_VAL(lt_cv_path_MAGIC_CMD, +[case $MAGIC_CMD in +[[\\/*] | ?:[\\/]*]) + lt_cv_path_MAGIC_CMD="$MAGIC_CMD" # Let the user override the test with a path. + ;; +*) + lt_save_MAGIC_CMD="$MAGIC_CMD" + lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR +dnl $ac_dummy forces splitting on constant user-supplied paths. +dnl POSIX.2 word splitting is done only on the output of word expansions, +dnl not every word. This closes a longstanding sh security hole. + ac_dummy="m4_if([$2], , $PATH, [$2])" + for ac_dir in $ac_dummy; do + IFS="$lt_save_ifs" + test -z "$ac_dir" && ac_dir=. + if test -f $ac_dir/$1; then + lt_cv_path_MAGIC_CMD="$ac_dir/$1" + if test -n "$file_magic_test_file"; then + case $deplibs_check_method in + "file_magic "*) + file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"` + MAGIC_CMD="$lt_cv_path_MAGIC_CMD" + if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null | + $EGREP "$file_magic_regex" > /dev/null; then + : + else + cat <<_LT_EOF 1>&2 + +*** Warning: the command libtool uses to detect shared libraries, +*** $file_magic_cmd, produces output that libtool cannot recognize. +*** The result is that libtool may fail to recognize shared libraries +*** as such. This will affect the creation of libtool libraries that +*** depend on shared libraries, but programs linked with such libtool +*** libraries will work regardless of this problem. Nevertheless, you +*** may want to report the problem to your system manager and/or to +*** bug-libtool@gnu.org + +_LT_EOF + fi ;; + esac + fi + break + fi + done + IFS="$lt_save_ifs" + MAGIC_CMD="$lt_save_MAGIC_CMD" + ;; +esac]) +MAGIC_CMD="$lt_cv_path_MAGIC_CMD" +if test -n "$MAGIC_CMD"; then + AC_MSG_RESULT($MAGIC_CMD) +else + AC_MSG_RESULT(no) +fi +_LT_DECL([], [MAGIC_CMD], [0], + [Used to examine libraries when file_magic_cmd begins with "file"])dnl +])# _LT_PATH_TOOL_PREFIX + +# Old name: +AU_ALIAS([AC_PATH_TOOL_PREFIX], [_LT_PATH_TOOL_PREFIX]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_PATH_TOOL_PREFIX], []) + + +# _LT_PATH_MAGIC +# -------------- +# find a file program which can recognize a shared library +m4_defun([_LT_PATH_MAGIC], +[_LT_PATH_TOOL_PREFIX(${ac_tool_prefix}file, /usr/bin$PATH_SEPARATOR$PATH) +if test -z "$lt_cv_path_MAGIC_CMD"; then + if test -n "$ac_tool_prefix"; then + _LT_PATH_TOOL_PREFIX(file, /usr/bin$PATH_SEPARATOR$PATH) + else + MAGIC_CMD=: + fi +fi +])# _LT_PATH_MAGIC + + +# LT_PATH_LD +# ---------- +# find the pathname to the GNU or non-GNU linker +AC_DEFUN([LT_PATH_LD], +[AC_REQUIRE([AC_PROG_CC])dnl +AC_REQUIRE([AC_CANONICAL_HOST])dnl +AC_REQUIRE([AC_CANONICAL_BUILD])dnl +m4_require([_LT_DECL_SED])dnl +m4_require([_LT_DECL_EGREP])dnl +m4_require([_LT_PROG_ECHO_BACKSLASH])dnl + +AC_ARG_WITH([gnu-ld], + [AS_HELP_STRING([--with-gnu-ld], + [assume the C compiler uses GNU ld @<:@default=no@:>@])], + [test "$withval" = no || with_gnu_ld=yes], + [with_gnu_ld=no])dnl + +ac_prog=ld +if test "$GCC" = yes; then + # Check if gcc -print-prog-name=ld gives a path. + AC_MSG_CHECKING([for ld used by $CC]) + case $host in + *-*-mingw*) + # gcc leaves a trailing carriage return which upsets mingw + ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;; + *) + ac_prog=`($CC -print-prog-name=ld) 2>&5` ;; + esac + case $ac_prog in + # Accept absolute paths. + [[\\/]]* | ?:[[\\/]]*) + re_direlt='/[[^/]][[^/]]*/\.\./' + # Canonicalize the pathname of ld + ac_prog=`$ECHO "$ac_prog"| $SED 's%\\\\%/%g'` + while $ECHO "$ac_prog" | $GREP "$re_direlt" > /dev/null 2>&1; do + ac_prog=`$ECHO $ac_prog| $SED "s%$re_direlt%/%"` + done + test -z "$LD" && LD="$ac_prog" + ;; + "") + # If it fails, then pretend we aren't using GCC. + ac_prog=ld + ;; + *) + # If it is relative, then search for the first ld in PATH. + with_gnu_ld=unknown + ;; + esac +elif test "$with_gnu_ld" = yes; then + AC_MSG_CHECKING([for GNU ld]) +else + AC_MSG_CHECKING([for non-GNU ld]) +fi +AC_CACHE_VAL(lt_cv_path_LD, +[if test -z "$LD"; then + lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR + for ac_dir in $PATH; do + IFS="$lt_save_ifs" + test -z "$ac_dir" && ac_dir=. + if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then + lt_cv_path_LD="$ac_dir/$ac_prog" + # Check to see if the program is GNU ld. I'd rather use --version, + # but apparently some variants of GNU ld only accept -v. + # Break only if it was the GNU/non-GNU ld that we prefer. + case `"$lt_cv_path_LD" -v 2>&1 &1 /dev/null 2>&1; then + lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL' + lt_cv_file_magic_cmd='func_win32_libid' + else + # Keep this pattern in sync with the one in func_win32_libid. + lt_cv_deplibs_check_method='file_magic file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)' + lt_cv_file_magic_cmd='$OBJDUMP -f' + fi + ;; + +cegcc*) + # use the weaker test based on 'objdump'. See mingw*. + lt_cv_deplibs_check_method='file_magic file format pe-arm-.*little(.*architecture: arm)?' + lt_cv_file_magic_cmd='$OBJDUMP -f' + ;; + +darwin* | rhapsody*) + lt_cv_deplibs_check_method=pass_all + ;; + +freebsd* | dragonfly*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then + case $host_cpu in + i*86 ) + # Not sure whether the presence of OpenBSD here was a mistake. + # Let's accept both of them until this is cleared up. + lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD|DragonFly)/i[[3-9]]86 (compact )?demand paged shared library' + lt_cv_file_magic_cmd=/usr/bin/file + lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*` + ;; + esac + else + lt_cv_deplibs_check_method=pass_all + fi + ;; + +gnu*) + lt_cv_deplibs_check_method=pass_all + ;; + +haiku*) + lt_cv_deplibs_check_method=pass_all + ;; + +hpux10.20* | hpux11*) + lt_cv_file_magic_cmd=/usr/bin/file + case $host_cpu in + ia64*) + lt_cv_deplibs_check_method='file_magic (s[[0-9]][[0-9]][[0-9]]|ELF-[[0-9]][[0-9]]) shared object file - IA64' + lt_cv_file_magic_test_file=/usr/lib/hpux32/libc.so + ;; + hppa*64*) + [lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF[ -][0-9][0-9])(-bit)?( [LM]SB)? shared object( file)?[, -]* PA-RISC [0-9]\.[0-9]'] + lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl + ;; + *) + lt_cv_deplibs_check_method='file_magic (s[[0-9]][[0-9]][[0-9]]|PA-RISC[[0-9]]\.[[0-9]]) shared library' + lt_cv_file_magic_test_file=/usr/lib/libc.sl + ;; + esac + ;; + +interix[[3-9]]*) + # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here + lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so|\.a)$' + ;; + +irix5* | irix6* | nonstopux*) + case $LD in + *-32|*"-32 ") libmagic=32-bit;; + *-n32|*"-n32 ") libmagic=N32;; + *-64|*"-64 ") libmagic=64-bit;; + *) libmagic=never-match;; + esac + lt_cv_deplibs_check_method=pass_all + ;; + +# This must be glibc/ELF. +linux* | k*bsd*-gnu | kopensolaris*-gnu) + lt_cv_deplibs_check_method=pass_all + ;; + +netbsd*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then + lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|_pic\.a)$' + else + lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so|_pic\.a)$' + fi + ;; + +newos6*) + lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (executable|dynamic lib)' + lt_cv_file_magic_cmd=/usr/bin/file + lt_cv_file_magic_test_file=/usr/lib/libnls.so + ;; + +*nto* | *qnx*) + lt_cv_deplibs_check_method=pass_all + ;; + +openbsd*) + if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then + lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|\.so|_pic\.a)$' + else + lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|_pic\.a)$' + fi + ;; + +osf3* | osf4* | osf5*) + lt_cv_deplibs_check_method=pass_all + ;; + +rdos*) + lt_cv_deplibs_check_method=pass_all + ;; + +solaris*) + lt_cv_deplibs_check_method=pass_all + ;; + +sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) + lt_cv_deplibs_check_method=pass_all + ;; + +sysv4 | sysv4.3*) + case $host_vendor in + motorola) + lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (shared object|dynamic lib) M[[0-9]][[0-9]]* Version [[0-9]]' + lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*` + ;; + ncr) + lt_cv_deplibs_check_method=pass_all + ;; + sequent) + lt_cv_file_magic_cmd='/bin/file' + lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[LM]]SB (shared object|dynamic lib )' + ;; + sni) + lt_cv_file_magic_cmd='/bin/file' + lt_cv_deplibs_check_method="file_magic ELF [[0-9]][[0-9]]*-bit [[LM]]SB dynamic lib" + lt_cv_file_magic_test_file=/lib/libc.so + ;; + siemens) + lt_cv_deplibs_check_method=pass_all + ;; + pc) + lt_cv_deplibs_check_method=pass_all + ;; + esac + ;; + +tpf*) + lt_cv_deplibs_check_method=pass_all + ;; +esac +]) + +file_magic_glob= +want_nocaseglob=no +if test "$build" = "$host"; then + case $host_os in + mingw* | pw32*) + if ( shopt | grep nocaseglob ) >/dev/null 2>&1; then + want_nocaseglob=yes + else + file_magic_glob=`echo aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ | $SED -e "s/\(..\)/s\/[[\1]]\/[[\1]]\/g;/g"` + fi + ;; + esac +fi + +file_magic_cmd=$lt_cv_file_magic_cmd +deplibs_check_method=$lt_cv_deplibs_check_method +test -z "$deplibs_check_method" && deplibs_check_method=unknown + +_LT_DECL([], [deplibs_check_method], [1], + [Method to check whether dependent libraries are shared objects]) +_LT_DECL([], [file_magic_cmd], [1], + [Command to use when deplibs_check_method = "file_magic"]) +_LT_DECL([], [file_magic_glob], [1], + [How to find potential files when deplibs_check_method = "file_magic"]) +_LT_DECL([], [want_nocaseglob], [1], + [Find potential files using nocaseglob when deplibs_check_method = "file_magic"]) +])# _LT_CHECK_MAGIC_METHOD + + +# LT_PATH_NM +# ---------- +# find the pathname to a BSD- or MS-compatible name lister +AC_DEFUN([LT_PATH_NM], +[AC_REQUIRE([AC_PROG_CC])dnl +AC_CACHE_CHECK([for BSD- or MS-compatible name lister (nm)], lt_cv_path_NM, +[if test -n "$NM"; then + # Let the user override the test. + lt_cv_path_NM="$NM" +else + lt_nm_to_check="${ac_tool_prefix}nm" + if test -n "$ac_tool_prefix" && test "$build" = "$host"; then + lt_nm_to_check="$lt_nm_to_check nm" + fi + for lt_tmp_nm in $lt_nm_to_check; do + lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR + for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do + IFS="$lt_save_ifs" + test -z "$ac_dir" && ac_dir=. + tmp_nm="$ac_dir/$lt_tmp_nm" + if test -f "$tmp_nm" || test -f "$tmp_nm$ac_exeext" ; then + # Check to see if the nm accepts a BSD-compat flag. + # Adding the `sed 1q' prevents false positives on HP-UX, which says: + # nm: unknown option "B" ignored + # Tru64's nm complains that /dev/null is an invalid object file + case `"$tmp_nm" -B /dev/null 2>&1 | sed '1q'` in + */dev/null* | *'Invalid file or object type'*) + lt_cv_path_NM="$tmp_nm -B" + break + ;; + *) + case `"$tmp_nm" -p /dev/null 2>&1 | sed '1q'` in + */dev/null*) + lt_cv_path_NM="$tmp_nm -p" + break + ;; + *) + lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but + continue # so that we can try to find one that supports BSD flags + ;; + esac + ;; + esac + fi + done + IFS="$lt_save_ifs" + done + : ${lt_cv_path_NM=no} +fi]) +if test "$lt_cv_path_NM" != "no"; then + NM="$lt_cv_path_NM" +else + # Didn't find any BSD compatible name lister, look for dumpbin. + if test -n "$DUMPBIN"; then : + # Let the user override the test. + else + AC_CHECK_TOOLS(DUMPBIN, [dumpbin "link -dump"], :) + case `$DUMPBIN -symbols /dev/null 2>&1 | sed '1q'` in + *COFF*) + DUMPBIN="$DUMPBIN -symbols" + ;; + *) + DUMPBIN=: + ;; + esac + fi + AC_SUBST([DUMPBIN]) + if test "$DUMPBIN" != ":"; then + NM="$DUMPBIN" + fi +fi +test -z "$NM" && NM=nm +AC_SUBST([NM]) +_LT_DECL([], [NM], [1], [A BSD- or MS-compatible name lister])dnl + +AC_CACHE_CHECK([the name lister ($NM) interface], [lt_cv_nm_interface], + [lt_cv_nm_interface="BSD nm" + echo "int some_variable = 0;" > conftest.$ac_ext + (eval echo "\"\$as_me:$LINENO: $ac_compile\"" >&AS_MESSAGE_LOG_FD) + (eval "$ac_compile" 2>conftest.err) + cat conftest.err >&AS_MESSAGE_LOG_FD + (eval echo "\"\$as_me:$LINENO: $NM \\\"conftest.$ac_objext\\\"\"" >&AS_MESSAGE_LOG_FD) + (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out) + cat conftest.err >&AS_MESSAGE_LOG_FD + (eval echo "\"\$as_me:$LINENO: output\"" >&AS_MESSAGE_LOG_FD) + cat conftest.out >&AS_MESSAGE_LOG_FD + if $GREP 'External.*some_variable' conftest.out > /dev/null; then + lt_cv_nm_interface="MS dumpbin" + fi + rm -f conftest*]) +])# LT_PATH_NM + +# Old names: +AU_ALIAS([AM_PROG_NM], [LT_PATH_NM]) +AU_ALIAS([AC_PROG_NM], [LT_PATH_NM]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AM_PROG_NM], []) +dnl AC_DEFUN([AC_PROG_NM], []) + +# _LT_CHECK_SHAREDLIB_FROM_LINKLIB +# -------------------------------- +# how to determine the name of the shared library +# associated with a specific link library. +# -- PORTME fill in with the dynamic library characteristics +m4_defun([_LT_CHECK_SHAREDLIB_FROM_LINKLIB], +[m4_require([_LT_DECL_EGREP]) +m4_require([_LT_DECL_OBJDUMP]) +m4_require([_LT_DECL_DLLTOOL]) +AC_CACHE_CHECK([how to associate runtime and link libraries], +lt_cv_sharedlib_from_linklib_cmd, +[lt_cv_sharedlib_from_linklib_cmd='unknown' + +case $host_os in +cygwin* | mingw* | pw32* | cegcc*) + # two different shell functions defined in ltmain.sh + # decide which to use based on capabilities of $DLLTOOL + case `$DLLTOOL --help 2>&1` in + *--identify-strict*) + lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib + ;; + *) + lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib_fallback + ;; + esac + ;; +*) + # fallback: assume linklib IS sharedlib + lt_cv_sharedlib_from_linklib_cmd="$ECHO" + ;; +esac +]) +sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd +test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO + +_LT_DECL([], [sharedlib_from_linklib_cmd], [1], + [Command to associate shared and link libraries]) +])# _LT_CHECK_SHAREDLIB_FROM_LINKLIB + + +# _LT_PATH_MANIFEST_TOOL +# ---------------------- +# locate the manifest tool +m4_defun([_LT_PATH_MANIFEST_TOOL], +[AC_CHECK_TOOL(MANIFEST_TOOL, mt, :) +test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt +AC_CACHE_CHECK([if $MANIFEST_TOOL is a manifest tool], [lt_cv_path_mainfest_tool], + [lt_cv_path_mainfest_tool=no + echo "$as_me:$LINENO: $MANIFEST_TOOL '-?'" >&AS_MESSAGE_LOG_FD + $MANIFEST_TOOL '-?' 2>conftest.err > conftest.out + cat conftest.err >&AS_MESSAGE_LOG_FD + if $GREP 'Manifest Tool' conftest.out > /dev/null; then + lt_cv_path_mainfest_tool=yes + fi + rm -f conftest*]) +if test "x$lt_cv_path_mainfest_tool" != xyes; then + MANIFEST_TOOL=: +fi +_LT_DECL([], [MANIFEST_TOOL], [1], [Manifest tool])dnl +])# _LT_PATH_MANIFEST_TOOL + + +# LT_LIB_M +# -------- +# check for math library +AC_DEFUN([LT_LIB_M], +[AC_REQUIRE([AC_CANONICAL_HOST])dnl +LIBM= +case $host in +*-*-beos* | *-*-cegcc* | *-*-cygwin* | *-*-haiku* | *-*-pw32* | *-*-darwin*) + # These system don't have libm, or don't need it + ;; +*-ncr-sysv4.3*) + AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw") + AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm") + ;; +*) + AC_CHECK_LIB(m, cos, LIBM="-lm") + ;; +esac +AC_SUBST([LIBM]) +])# LT_LIB_M + +# Old name: +AU_ALIAS([AC_CHECK_LIBM], [LT_LIB_M]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_CHECK_LIBM], []) + + +# _LT_COMPILER_NO_RTTI([TAGNAME]) +# ------------------------------- +m4_defun([_LT_COMPILER_NO_RTTI], +[m4_require([_LT_TAG_COMPILER])dnl + +_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)= + +if test "$GCC" = yes; then + case $cc_basename in + nvcc*) + _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -Xcompiler -fno-builtin' ;; + *) + _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -fno-builtin' ;; + esac + + _LT_COMPILER_OPTION([if $compiler supports -fno-rtti -fno-exceptions], + lt_cv_prog_compiler_rtti_exceptions, + [-fno-rtti -fno-exceptions], [], + [_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)="$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1) -fno-rtti -fno-exceptions"]) +fi +_LT_TAGDECL([no_builtin_flag], [lt_prog_compiler_no_builtin_flag], [1], + [Compiler flag to turn off builtin functions]) +])# _LT_COMPILER_NO_RTTI + + +# _LT_CMD_GLOBAL_SYMBOLS +# ---------------------- +m4_defun([_LT_CMD_GLOBAL_SYMBOLS], +[AC_REQUIRE([AC_CANONICAL_HOST])dnl +AC_REQUIRE([AC_PROG_CC])dnl +AC_REQUIRE([AC_PROG_AWK])dnl +AC_REQUIRE([LT_PATH_NM])dnl +AC_REQUIRE([LT_PATH_LD])dnl +m4_require([_LT_DECL_SED])dnl +m4_require([_LT_DECL_EGREP])dnl +m4_require([_LT_TAG_COMPILER])dnl + +# Check for command to grab the raw symbol name followed by C symbol from nm. +AC_MSG_CHECKING([command to parse $NM output from $compiler object]) +AC_CACHE_VAL([lt_cv_sys_global_symbol_pipe], +[ +# These are sane defaults that work on at least a few old systems. +# [They come from Ultrix. What could be older than Ultrix?!! ;)] + +# Character class describing NM global symbol codes. +symcode='[[BCDEGRST]]' + +# Regexp to match symbols that can be accessed directly from C. +sympat='\([[_A-Za-z]][[_A-Za-z0-9]]*\)' + +# Define system-specific variables. +case $host_os in +aix*) + symcode='[[BCDT]]' + ;; +cygwin* | mingw* | pw32* | cegcc*) + symcode='[[ABCDGISTW]]' + ;; +hpux*) + if test "$host_cpu" = ia64; then + symcode='[[ABCDEGRST]]' + fi + ;; +irix* | nonstopux*) + symcode='[[BCDEGRST]]' + ;; +osf*) + symcode='[[BCDEGQRST]]' + ;; +solaris*) + symcode='[[BDRT]]' + ;; +sco3.2v5*) + symcode='[[DT]]' + ;; +sysv4.2uw2*) + symcode='[[DT]]' + ;; +sysv5* | sco5v6* | unixware* | OpenUNIX*) + symcode='[[ABDT]]' + ;; +sysv4) + symcode='[[DFNSTU]]' + ;; +esac + +# If we're using GNU nm, then use its standard symbol codes. +case `$NM -V 2>&1` in +*GNU* | *'with BFD'*) + symcode='[[ABCDGIRSTW]]' ;; +esac + +# Transform an extracted symbol line into a proper C declaration. +# Some systems (esp. on ia64) link data and code symbols differently, +# so use this general approach. +lt_cv_sys_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern int \1();/p' -e 's/^$symcode* .* \(.*\)$/extern char \1;/p'" + +# Transform an extracted symbol line into symbol name and symbol address +lt_cv_sys_global_symbol_to_c_name_address="sed -n -e 's/^: \([[^ ]]*\)[[ ]]*$/ {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([[^ ]]*\) \([[^ ]]*\)$/ {\"\2\", (void *) \&\2},/p'" +lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n -e 's/^: \([[^ ]]*\)[[ ]]*$/ {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([[^ ]]*\) \(lib[[^ ]]*\)$/ {\"\2\", (void *) \&\2},/p' -e 's/^$symcode* \([[^ ]]*\) \([[^ ]]*\)$/ {\"lib\2\", (void *) \&\2},/p'" + +# Handle CRLF in mingw tool chain +opt_cr= +case $build_os in +mingw*) + opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp + ;; +esac + +# Try without a prefix underscore, then with it. +for ac_symprfx in "" "_"; do + + # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol. + symxfrm="\\1 $ac_symprfx\\2 \\2" + + # Write the raw and C identifiers. + if test "$lt_cv_nm_interface" = "MS dumpbin"; then + # Fake it for dumpbin and say T for any non-static function + # and D for any global variable. + # Also find C++ and __fastcall symbols from MSVC++, + # which start with @ or ?. + lt_cv_sys_global_symbol_pipe="$AWK ['"\ +" {last_section=section; section=\$ 3};"\ +" /^COFF SYMBOL TABLE/{for(i in hide) delete hide[i]};"\ +" /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\ +" \$ 0!~/External *\|/{next};"\ +" / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\ +" {if(hide[section]) next};"\ +" {f=0}; \$ 0~/\(\).*\|/{f=1}; {printf f ? \"T \" : \"D \"};"\ +" {split(\$ 0, a, /\||\r/); split(a[2], s)};"\ +" s[1]~/^[@?]/{print s[1], s[1]; next};"\ +" s[1]~prfx {split(s[1],t,\"@\"); print t[1], substr(t[1],length(prfx))}"\ +" ' prfx=^$ac_symprfx]" + else + lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[[ ]]\($symcode$symcode*\)[[ ]][[ ]]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'" + fi + lt_cv_sys_global_symbol_pipe="$lt_cv_sys_global_symbol_pipe | sed '/ __gnu_lto/d'" + + # Check to see that the pipe works correctly. + pipe_works=no + + rm -f conftest* + cat > conftest.$ac_ext <<_LT_EOF +#ifdef __cplusplus +extern "C" { +#endif +char nm_test_var; +void nm_test_func(void); +void nm_test_func(void){} +#ifdef __cplusplus +} +#endif +int main(){nm_test_var='a';nm_test_func();return(0);} +_LT_EOF + + if AC_TRY_EVAL(ac_compile); then + # Now try to grab the symbols. + nlist=conftest.nm + if AC_TRY_EVAL(NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) && test -s "$nlist"; then + # Try sorting and uniquifying the output. + if sort "$nlist" | uniq > "$nlist"T; then + mv -f "$nlist"T "$nlist" + else + rm -f "$nlist"T + fi + + # Make sure that we snagged all the symbols we need. + if $GREP ' nm_test_var$' "$nlist" >/dev/null; then + if $GREP ' nm_test_func$' "$nlist" >/dev/null; then + cat <<_LT_EOF > conftest.$ac_ext +/* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */ +#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) +/* DATA imports from DLLs on WIN32 con't be const, because runtime + relocations are performed -- see ld's documentation on pseudo-relocs. */ +# define LT@&t@_DLSYM_CONST +#elif defined(__osf__) +/* This system does not cope well with relocations in const data. */ +# define LT@&t@_DLSYM_CONST +#else +# define LT@&t@_DLSYM_CONST const +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +_LT_EOF + # Now generate the symbol file. + eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext' + + cat <<_LT_EOF >> conftest.$ac_ext + +/* The mapping between symbol names and symbols. */ +LT@&t@_DLSYM_CONST struct { + const char *name; + void *address; +} +lt__PROGRAM__LTX_preloaded_symbols[[]] = +{ + { "@PROGRAM@", (void *) 0 }, +_LT_EOF + $SED "s/^$symcode$symcode* \(.*\) \(.*\)$/ {\"\2\", (void *) \&\2},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext + cat <<\_LT_EOF >> conftest.$ac_ext + {0, (void *) 0} +}; + +/* This works around a problem in FreeBSD linker */ +#ifdef FREEBSD_WORKAROUND +static const void *lt_preloaded_setup() { + return lt__PROGRAM__LTX_preloaded_symbols; +} +#endif + +#ifdef __cplusplus +} +#endif +_LT_EOF + # Now try linking the two files. + mv conftest.$ac_objext conftstm.$ac_objext + lt_globsym_save_LIBS=$LIBS + lt_globsym_save_CFLAGS=$CFLAGS + LIBS="conftstm.$ac_objext" + CFLAGS="$CFLAGS$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)" + if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext}; then + pipe_works=yes + fi + LIBS=$lt_globsym_save_LIBS + CFLAGS=$lt_globsym_save_CFLAGS + else + echo "cannot find nm_test_func in $nlist" >&AS_MESSAGE_LOG_FD + fi + else + echo "cannot find nm_test_var in $nlist" >&AS_MESSAGE_LOG_FD + fi + else + echo "cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD + fi + else + echo "$progname: failed program was:" >&AS_MESSAGE_LOG_FD + cat conftest.$ac_ext >&5 + fi + rm -rf conftest* conftst* + + # Do not use the global_symbol_pipe unless it works. + if test "$pipe_works" = yes; then + break + else + lt_cv_sys_global_symbol_pipe= + fi +done +]) +if test -z "$lt_cv_sys_global_symbol_pipe"; then + lt_cv_sys_global_symbol_to_cdecl= +fi +if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then + AC_MSG_RESULT(failed) +else + AC_MSG_RESULT(ok) +fi + +# Response file support. +if test "$lt_cv_nm_interface" = "MS dumpbin"; then + nm_file_list_spec='@' +elif $NM --help 2>/dev/null | grep '[[@]]FILE' >/dev/null; then + nm_file_list_spec='@' +fi + +_LT_DECL([global_symbol_pipe], [lt_cv_sys_global_symbol_pipe], [1], + [Take the output of nm and produce a listing of raw symbols and C names]) +_LT_DECL([global_symbol_to_cdecl], [lt_cv_sys_global_symbol_to_cdecl], [1], + [Transform the output of nm in a proper C declaration]) +_LT_DECL([global_symbol_to_c_name_address], + [lt_cv_sys_global_symbol_to_c_name_address], [1], + [Transform the output of nm in a C name address pair]) +_LT_DECL([global_symbol_to_c_name_address_lib_prefix], + [lt_cv_sys_global_symbol_to_c_name_address_lib_prefix], [1], + [Transform the output of nm in a C name address pair when lib prefix is needed]) +_LT_DECL([], [nm_file_list_spec], [1], + [Specify filename containing input files for $NM]) +]) # _LT_CMD_GLOBAL_SYMBOLS + + +# _LT_COMPILER_PIC([TAGNAME]) +# --------------------------- +m4_defun([_LT_COMPILER_PIC], +[m4_require([_LT_TAG_COMPILER])dnl +_LT_TAGVAR(lt_prog_compiler_wl, $1)= +_LT_TAGVAR(lt_prog_compiler_pic, $1)= +_LT_TAGVAR(lt_prog_compiler_static, $1)= + +m4_if([$1], [CXX], [ + # C++ specific cases for pic, static, wl, etc. + if test "$GXX" = yes; then + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' + + case $host_os in + aix*) + # All AIX code is PIC. + if test "$host_cpu" = ia64; then + # AIX 5 now supports IA64 processor + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + fi + ;; + + amigaos*) + case $host_cpu in + powerpc) + # see comment about AmigaOS4 .so support + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + ;; + m68k) + # FIXME: we need at least 68020 code to build shared libraries, but + # adding the `-m68020' flag to GCC prevents building anything better, + # like `-m68040'. + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4' + ;; + esac + ;; + + beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*) + # PIC is the default for these OSes. + ;; + mingw* | cygwin* | os2* | pw32* | cegcc*) + # This hack is so that the source file can tell whether it is being + # built for inclusion in a dll (and should export symbols for example). + # Although the cygwin gcc ignores -fPIC, still need this for old-style + # (--disable-auto-import) libraries + m4_if([$1], [GCJ], [], + [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) + ;; + darwin* | rhapsody*) + # PIC is the default on this platform + # Common symbols not allowed in MH_DYLIB files + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common' + ;; + *djgpp*) + # DJGPP does not support shared libraries at all + _LT_TAGVAR(lt_prog_compiler_pic, $1)= + ;; + haiku*) + # PIC is the default for Haiku. + # The "-static" flag exists, but is broken. + _LT_TAGVAR(lt_prog_compiler_static, $1)= + ;; + interix[[3-9]]*) + # Interix 3.x gcc -fpic/-fPIC options generate broken code. + # Instead, we relocate shared libraries at runtime. + ;; + sysv4*MP*) + if test -d /usr/nec; then + _LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic + fi + ;; + hpux*) + # PIC is the default for 64-bit PA HP-UX, but not for 32-bit + # PA HP-UX. On IA64 HP-UX, PIC is the default but the pic flag + # sets the default TLS model and affects inlining. + case $host_cpu in + hppa*64*) + ;; + *) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + ;; + esac + ;; + *qnx* | *nto*) + # QNX uses GNU C++, but need to define -shared option too, otherwise + # it will coredump. + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' + ;; + *) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + ;; + esac + else + case $host_os in + aix[[4-9]]*) + # All AIX code is PIC. + if test "$host_cpu" = ia64; then + # AIX 5 now supports IA64 processor + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + else + _LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp' + fi + ;; + chorus*) + case $cc_basename in + cxch68*) + # Green Hills C++ Compiler + # _LT_TAGVAR(lt_prog_compiler_static, $1)="--no_auto_instantiation -u __main -u __premain -u _abort -r $COOL_DIR/lib/libOrb.a $MVME_DIR/lib/CC/libC.a $MVME_DIR/lib/classix/libcx.s.a" + ;; + esac + ;; + mingw* | cygwin* | os2* | pw32* | cegcc*) + # This hack is so that the source file can tell whether it is being + # built for inclusion in a dll (and should export symbols for example). + m4_if([$1], [GCJ], [], + [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) + ;; + dgux*) + case $cc_basename in + ec++*) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + ;; + ghcx*) + # Green Hills C++ Compiler + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' + ;; + *) + ;; + esac + ;; + freebsd* | dragonfly*) + # FreeBSD uses GNU C++ + ;; + hpux9* | hpux10* | hpux11*) + case $cc_basename in + CC*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive' + if test "$host_cpu" != ia64; then + _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' + fi + ;; + aCC*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive' + case $host_cpu in + hppa*64*|ia64*) + # +Z the default + ;; + *) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' + ;; + esac + ;; + *) + ;; + esac + ;; + interix*) + # This is c89, which is MS Visual C++ (no shared libs) + # Anyone wants to do a port? + ;; + irix5* | irix6* | nonstopux*) + case $cc_basename in + CC*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' + # CC pic flag -KPIC is the default. + ;; + *) + ;; + esac + ;; + linux* | k*bsd*-gnu | kopensolaris*-gnu) + case $cc_basename in + KCC*) + # KAI C++ Compiler + _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + ;; + ecpc* ) + # old Intel C++ for x86_64 which still supported -KPIC. + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' + ;; + icpc* ) + # Intel C++, used to be incompatible with GCC. + # ICC 10 doesn't accept -KPIC any more. + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' + ;; + pgCC* | pgcpp*) + # Portland Group C++ compiler + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + cxx*) + # Compaq C++ + # Make sure the PIC flag is empty. It appears that all Alpha + # Linux and Compaq Tru64 Unix objects are PIC. + _LT_TAGVAR(lt_prog_compiler_pic, $1)= + _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' + ;; + xlc* | xlC* | bgxl[[cC]]* | mpixl[[cC]]*) + # IBM XL 8.0, 9.0 on PPC and BlueGene + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink' + ;; + *) + case `$CC -V 2>&1 | sed 5q` in + *Sun\ C*) + # Sun C++ 5.9 + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' + ;; + esac + ;; + esac + ;; + lynxos*) + ;; + m88k*) + ;; + mvs*) + case $cc_basename in + cxx*) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-W c,exportall' + ;; + *) + ;; + esac + ;; + netbsd*) + ;; + *qnx* | *nto*) + # QNX uses GNU C++, but need to define -shared option too, otherwise + # it will coredump. + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' + ;; + osf3* | osf4* | osf5*) + case $cc_basename in + KCC*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,' + ;; + RCC*) + # Rational C++ 2.4.1 + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' + ;; + cxx*) + # Digital/Compaq C++ + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + # Make sure the PIC flag is empty. It appears that all Alpha + # Linux and Compaq Tru64 Unix objects are PIC. + _LT_TAGVAR(lt_prog_compiler_pic, $1)= + _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' + ;; + *) + ;; + esac + ;; + psos*) + ;; + solaris*) + case $cc_basename in + CC* | sunCC*) + # Sun C++ 4.2, 5.x and Centerline C++ + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' + ;; + gcx*) + # Green Hills C++ Compiler + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' + ;; + *) + ;; + esac + ;; + sunos4*) + case $cc_basename in + CC*) + # Sun C++ 4.x + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + lcc*) + # Lucid + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' + ;; + *) + ;; + esac + ;; + sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*) + case $cc_basename in + CC*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + esac + ;; + tandem*) + case $cc_basename in + NCC*) + # NonStop-UX NCC 3.20 + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + ;; + *) + ;; + esac + ;; + vxworks*) + ;; + *) + _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no + ;; + esac + fi +], +[ + if test "$GCC" = yes; then + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' + + case $host_os in + aix*) + # All AIX code is PIC. + if test "$host_cpu" = ia64; then + # AIX 5 now supports IA64 processor + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + fi + ;; + + amigaos*) + case $host_cpu in + powerpc) + # see comment about AmigaOS4 .so support + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + ;; + m68k) + # FIXME: we need at least 68020 code to build shared libraries, but + # adding the `-m68020' flag to GCC prevents building anything better, + # like `-m68040'. + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4' + ;; + esac + ;; + + beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*) + # PIC is the default for these OSes. + ;; + + mingw* | cygwin* | pw32* | os2* | cegcc*) + # This hack is so that the source file can tell whether it is being + # built for inclusion in a dll (and should export symbols for example). + # Although the cygwin gcc ignores -fPIC, still need this for old-style + # (--disable-auto-import) libraries + m4_if([$1], [GCJ], [], + [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) + ;; + + darwin* | rhapsody*) + # PIC is the default on this platform + # Common symbols not allowed in MH_DYLIB files + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common' + ;; + + haiku*) + # PIC is the default for Haiku. + # The "-static" flag exists, but is broken. + _LT_TAGVAR(lt_prog_compiler_static, $1)= + ;; + + hpux*) + # PIC is the default for 64-bit PA HP-UX, but not for 32-bit + # PA HP-UX. On IA64 HP-UX, PIC is the default but the pic flag + # sets the default TLS model and affects inlining. + case $host_cpu in + hppa*64*) + # +Z the default + ;; + *) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + ;; + esac + ;; + + interix[[3-9]]*) + # Interix 3.x gcc -fpic/-fPIC options generate broken code. + # Instead, we relocate shared libraries at runtime. + ;; + + msdosdjgpp*) + # Just because we use GCC doesn't mean we suddenly get shared libraries + # on systems that don't support them. + _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no + enable_shared=no + ;; + + *nto* | *qnx*) + # QNX uses GNU C++, but need to define -shared option too, otherwise + # it will coredump. + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' + ;; + + sysv4*MP*) + if test -d /usr/nec; then + _LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic + fi + ;; + + *) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + ;; + esac + + case $cc_basename in + nvcc*) # Cuda Compiler Driver 2.2 + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Xlinker ' + if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then + _LT_TAGVAR(lt_prog_compiler_pic, $1)="-Xcompiler $_LT_TAGVAR(lt_prog_compiler_pic, $1)" + fi + ;; + esac + else + # PORTME Check for flag to pass linker flags through the system compiler. + case $host_os in + aix*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + if test "$host_cpu" = ia64; then + # AIX 5 now supports IA64 processor + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + else + _LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp' + fi + ;; + + mingw* | cygwin* | pw32* | os2* | cegcc*) + # This hack is so that the source file can tell whether it is being + # built for inclusion in a dll (and should export symbols for example). + m4_if([$1], [GCJ], [], + [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) + ;; + + hpux9* | hpux10* | hpux11*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + # PIC is the default for IA64 HP-UX and 64-bit HP-UX, but + # not for PA HP-UX. + case $host_cpu in + hppa*64*|ia64*) + # +Z the default + ;; + *) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' + ;; + esac + # Is there a better lt_prog_compiler_static that works with the bundled CC? + _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive' + ;; + + irix5* | irix6* | nonstopux*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + # PIC (with -KPIC) is the default. + _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' + ;; + + linux* | k*bsd*-gnu | kopensolaris*-gnu) + case $cc_basename in + # old Intel for x86_64 which still supported -KPIC. + ecc*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' + ;; + # icc used to be incompatible with GCC. + # ICC 10 doesn't accept -KPIC any more. + icc* | ifort*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' + ;; + # Lahey Fortran 8.1. + lf95*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='--shared' + _LT_TAGVAR(lt_prog_compiler_static, $1)='--static' + ;; + nagfor*) + # NAG Fortran compiler + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,-Wl,,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + pgcc* | pgf77* | pgf90* | pgf95* | pgfortran*) + # Portland Group compilers (*not* the Pentium gcc compiler, + # which looks to be a dead project) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + ccc*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + # All Alpha code is PIC. + _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' + ;; + xl* | bgxl* | bgf* | mpixl*) + # IBM XL C 8.0/Fortran 10.1, 11.1 on PPC and BlueGene + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink' + ;; + *) + case `$CC -V 2>&1 | sed 5q` in + *Sun\ Ceres\ Fortran* | *Sun*Fortran*\ [[1-7]].* | *Sun*Fortran*\ 8.[[0-3]]*) + # Sun Fortran 8.3 passes all unrecognized flags to the linker + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + _LT_TAGVAR(lt_prog_compiler_wl, $1)='' + ;; + *Sun\ F* | *Sun*Fortran*) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' + ;; + *Sun\ C*) + # Sun C 5.9 + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + ;; + *Intel*\ [[CF]]*Compiler*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' + ;; + *Portland\ Group*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + esac + ;; + esac + ;; + + newsos6) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + + *nto* | *qnx*) + # QNX uses GNU C++, but need to define -shared option too, otherwise + # it will coredump. + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' + ;; + + osf3* | osf4* | osf5*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + # All OSF/1 code is PIC. + _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' + ;; + + rdos*) + _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' + ;; + + solaris*) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + case $cc_basename in + f77* | f90* | f95* | sunf77* | sunf90* | sunf95*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ';; + *) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,';; + esac + ;; + + sunos4*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + + sysv4 | sysv4.2uw2* | sysv4.3*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + + sysv4*MP*) + if test -d /usr/nec ;then + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-Kconform_pic' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + fi + ;; + + sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + + unicos*) + _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' + _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no + ;; + + uts4*) + _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' + _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' + ;; + + *) + _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no + ;; + esac + fi +]) +case $host_os in + # For platforms which do not support PIC, -DPIC is meaningless: + *djgpp*) + _LT_TAGVAR(lt_prog_compiler_pic, $1)= + ;; + *) + _LT_TAGVAR(lt_prog_compiler_pic, $1)="$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])" + ;; +esac + +AC_CACHE_CHECK([for $compiler option to produce PIC], + [_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)], + [_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)=$_LT_TAGVAR(lt_prog_compiler_pic, $1)]) +_LT_TAGVAR(lt_prog_compiler_pic, $1)=$_LT_TAGVAR(lt_cv_prog_compiler_pic, $1) + +# +# Check to make sure the PIC flag actually works. +# +if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then + _LT_COMPILER_OPTION([if $compiler PIC flag $_LT_TAGVAR(lt_prog_compiler_pic, $1) works], + [_LT_TAGVAR(lt_cv_prog_compiler_pic_works, $1)], + [$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])], [], + [case $_LT_TAGVAR(lt_prog_compiler_pic, $1) in + "" | " "*) ;; + *) _LT_TAGVAR(lt_prog_compiler_pic, $1)=" $_LT_TAGVAR(lt_prog_compiler_pic, $1)" ;; + esac], + [_LT_TAGVAR(lt_prog_compiler_pic, $1)= + _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no]) +fi +_LT_TAGDECL([pic_flag], [lt_prog_compiler_pic], [1], + [Additional compiler flags for building library objects]) + +_LT_TAGDECL([wl], [lt_prog_compiler_wl], [1], + [How to pass a linker flag through the compiler]) +# +# Check to make sure the static flag actually works. +# +wl=$_LT_TAGVAR(lt_prog_compiler_wl, $1) eval lt_tmp_static_flag=\"$_LT_TAGVAR(lt_prog_compiler_static, $1)\" +_LT_LINKER_OPTION([if $compiler static flag $lt_tmp_static_flag works], + _LT_TAGVAR(lt_cv_prog_compiler_static_works, $1), + $lt_tmp_static_flag, + [], + [_LT_TAGVAR(lt_prog_compiler_static, $1)=]) +_LT_TAGDECL([link_static_flag], [lt_prog_compiler_static], [1], + [Compiler flag to prevent dynamic linking]) +])# _LT_COMPILER_PIC + + +# _LT_LINKER_SHLIBS([TAGNAME]) +# ---------------------------- +# See if the linker supports building shared libraries. +m4_defun([_LT_LINKER_SHLIBS], +[AC_REQUIRE([LT_PATH_LD])dnl +AC_REQUIRE([LT_PATH_NM])dnl +m4_require([_LT_PATH_MANIFEST_TOOL])dnl +m4_require([_LT_FILEUTILS_DEFAULTS])dnl +m4_require([_LT_DECL_EGREP])dnl +m4_require([_LT_DECL_SED])dnl +m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl +m4_require([_LT_TAG_COMPILER])dnl +AC_MSG_CHECKING([whether the $compiler linker ($LD) supports shared libraries]) +m4_if([$1], [CXX], [ + _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols' + _LT_TAGVAR(exclude_expsyms, $1)=['_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*'] + case $host_os in + aix[[4-9]]*) + # If we're using GNU nm, then we don't want the "-C" option. + # -C means demangle to AIX nm, but means don't demangle with GNU nm + # Also, AIX nm treats weak defined symbols like other global defined + # symbols, whereas GNU nm marks them as "W". + if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then + _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' + else + _LT_TAGVAR(export_symbols_cmds, $1)='$NM -BCpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' + fi + ;; + pw32*) + _LT_TAGVAR(export_symbols_cmds, $1)="$ltdll_cmds" + ;; + cygwin* | mingw* | cegcc*) + case $cc_basename in + cl*) + _LT_TAGVAR(exclude_expsyms, $1)='_NULL_IMPORT_DESCRIPTOR|_IMPORT_DESCRIPTOR_.*' + ;; + *) + _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[[BCDGRS]][[ ]]/s/.*[[ ]]\([[^ ]]*\)/\1 DATA/;s/^.*[[ ]]__nm__\([[^ ]]*\)[[ ]][[^ ]]*/\1 DATA/;/^I[[ ]]/d;/^[[AITW]][[ ]]/s/.* //'\'' | sort | uniq > $export_symbols' + _LT_TAGVAR(exclude_expsyms, $1)=['[_]+GLOBAL_OFFSET_TABLE_|[_]+GLOBAL__[FID]_.*|[_]+head_[A-Za-z0-9_]+_dll|[A-Za-z0-9_]+_dll_iname'] + ;; + esac + ;; + *) + _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols' + ;; + esac +], [ + runpath_var= + _LT_TAGVAR(allow_undefined_flag, $1)= + _LT_TAGVAR(always_export_symbols, $1)=no + _LT_TAGVAR(archive_cmds, $1)= + _LT_TAGVAR(archive_expsym_cmds, $1)= + _LT_TAGVAR(compiler_needs_object, $1)=no + _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no + _LT_TAGVAR(export_dynamic_flag_spec, $1)= + _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols' + _LT_TAGVAR(hardcode_automatic, $1)=no + _LT_TAGVAR(hardcode_direct, $1)=no + _LT_TAGVAR(hardcode_direct_absolute, $1)=no + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)= + _LT_TAGVAR(hardcode_libdir_separator, $1)= + _LT_TAGVAR(hardcode_minus_L, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported + _LT_TAGVAR(inherit_rpath, $1)=no + _LT_TAGVAR(link_all_deplibs, $1)=unknown + _LT_TAGVAR(module_cmds, $1)= + _LT_TAGVAR(module_expsym_cmds, $1)= + _LT_TAGVAR(old_archive_from_new_cmds, $1)= + _LT_TAGVAR(old_archive_from_expsyms_cmds, $1)= + _LT_TAGVAR(thread_safe_flag_spec, $1)= + _LT_TAGVAR(whole_archive_flag_spec, $1)= + # include_expsyms should be a list of space-separated symbols to be *always* + # included in the symbol list + _LT_TAGVAR(include_expsyms, $1)= + # exclude_expsyms can be an extended regexp of symbols to exclude + # it will be wrapped by ` (' and `)$', so one must not match beginning or + # end of line. Example: `a|bc|.*d.*' will exclude the symbols `a' and `bc', + # as well as any symbol that contains `d'. + _LT_TAGVAR(exclude_expsyms, $1)=['_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*'] + # Although _GLOBAL_OFFSET_TABLE_ is a valid symbol C name, most a.out + # platforms (ab)use it in PIC code, but their linkers get confused if + # the symbol is explicitly referenced. Since portable code cannot + # rely on this symbol name, it's probably fine to never include it in + # preloaded symbol tables. + # Exclude shared library initialization/finalization symbols. +dnl Note also adjust exclude_expsyms for C++ above. + extract_expsyms_cmds= + + case $host_os in + cygwin* | mingw* | pw32* | cegcc*) + # FIXME: the MSVC++ port hasn't been tested in a loooong time + # When not using gcc, we currently assume that we are using + # Microsoft Visual C++. + if test "$GCC" != yes; then + with_gnu_ld=no + fi + ;; + interix*) + # we just hope/assume this is gcc and not c89 (= MSVC++) + with_gnu_ld=yes + ;; + openbsd*) + with_gnu_ld=no + ;; + esac + + _LT_TAGVAR(ld_shlibs, $1)=yes + + # On some targets, GNU ld is compatible enough with the native linker + # that we're better off using the native interface for both. + lt_use_gnu_ld_interface=no + if test "$with_gnu_ld" = yes; then + case $host_os in + aix*) + # The AIX port of GNU ld has always aspired to compatibility + # with the native linker. However, as the warning in the GNU ld + # block says, versions before 2.19.5* couldn't really create working + # shared libraries, regardless of the interface used. + case `$LD -v 2>&1` in + *\ \(GNU\ Binutils\)\ 2.19.5*) ;; + *\ \(GNU\ Binutils\)\ 2.[[2-9]]*) ;; + *\ \(GNU\ Binutils\)\ [[3-9]]*) ;; + *) + lt_use_gnu_ld_interface=yes + ;; + esac + ;; + *) + lt_use_gnu_ld_interface=yes + ;; + esac + fi + + if test "$lt_use_gnu_ld_interface" = yes; then + # If archive_cmds runs LD, not CC, wlarc should be empty + wlarc='${wl}' + + # Set some defaults for GNU ld with shared library support. These + # are reset later if shared libraries are not supported. Putting them + # here allows them to be overridden if necessary. + runpath_var=LD_RUN_PATH + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic' + # ancient GNU ld didn't support --whole-archive et. al. + if $LD --help 2>&1 | $GREP 'no-whole-archive' > /dev/null; then + _LT_TAGVAR(whole_archive_flag_spec, $1)="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive' + else + _LT_TAGVAR(whole_archive_flag_spec, $1)= + fi + supports_anon_versioning=no + case `$LD -v 2>&1` in + *GNU\ gold*) supports_anon_versioning=yes ;; + *\ [[01]].* | *\ 2.[[0-9]].* | *\ 2.10.*) ;; # catch versions < 2.11 + *\ 2.11.93.0.2\ *) supports_anon_versioning=yes ;; # RH7.3 ... + *\ 2.11.92.0.12\ *) supports_anon_versioning=yes ;; # Mandrake 8.2 ... + *\ 2.11.*) ;; # other 2.11 versions + *) supports_anon_versioning=yes ;; + esac + + # See if GNU ld supports shared libraries. + case $host_os in + aix[[3-9]]*) + # On AIX/PPC, the GNU linker is very broken + if test "$host_cpu" != ia64; then + _LT_TAGVAR(ld_shlibs, $1)=no + cat <<_LT_EOF 1>&2 + +*** Warning: the GNU linker, at least up to release 2.19, is reported +*** to be unable to reliably create shared libraries on AIX. +*** Therefore, libtool is disabling shared libraries support. If you +*** really care for shared libraries, you may want to install binutils +*** 2.20 or above, or modify your PATH so that a non-GNU linker is found. +*** You will then need to restart the configuration process. + +_LT_EOF + fi + ;; + + amigaos*) + case $host_cpu in + powerpc) + # see comment about AmigaOS4 .so support + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='' + ;; + m68k) + _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(hardcode_minus_L, $1)=yes + ;; + esac + ;; + + beos*) + if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + # Joseph Beckenbach says some releases of gcc + # support --undefined. This deserves some investigation. FIXME + _LT_TAGVAR(archive_cmds, $1)='$CC -nostart $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + + cygwin* | mingw* | pw32* | cegcc*) + # _LT_TAGVAR(hardcode_libdir_flag_spec, $1) is actually meaningless, + # as there is no search path for DLLs. + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-all-symbols' + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + _LT_TAGVAR(always_export_symbols, $1)=no + _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes + _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[[BCDGRS]][[ ]]/s/.*[[ ]]\([[^ ]]*\)/\1 DATA/;s/^.*[[ ]]__nm__\([[^ ]]*\)[[ ]][[^ ]]*/\1 DATA/;/^I[[ ]]/d;/^[[AITW]][[ ]]/s/.* //'\'' | sort | uniq > $export_symbols' + _LT_TAGVAR(exclude_expsyms, $1)=['[_]+GLOBAL_OFFSET_TABLE_|[_]+GLOBAL__[FID]_.*|[_]+head_[A-Za-z0-9_]+_dll|[A-Za-z0-9_]+_dll_iname'] + + if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib' + # If the export-symbols file already is a .def file (1st line + # is EXPORTS), use it as is; otherwise, prepend... + _LT_TAGVAR(archive_expsym_cmds, $1)='if test "x`$SED 1q $export_symbols`" = xEXPORTS; then + cp $export_symbols $output_objdir/$soname.def; + else + echo EXPORTS > $output_objdir/$soname.def; + cat $export_symbols >> $output_objdir/$soname.def; + fi~ + $CC -shared $output_objdir/$soname.def $libobjs $deplibs $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib' + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + + haiku*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(link_all_deplibs, $1)=yes + ;; + + interix[[3-9]]*) + _LT_TAGVAR(hardcode_direct, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + # Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc. + # Instead, shared libraries are loaded at an image base (0x10000000 by + # default) and relocated if they conflict, which is a slow very memory + # consuming and fragmenting process. To avoid this, we pick a random, + # 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link + # time. Moving up from 0x10000000 also allows more sbrk(2) space. + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='sed "s,^,_," $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--retain-symbols-file,$output_objdir/$soname.expsym ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib' + ;; + + gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu) + tmp_diet=no + if test "$host_os" = linux-dietlibc; then + case $cc_basename in + diet\ *) tmp_diet=yes;; # linux-dietlibc with static linking (!diet-dyn) + esac + fi + if $LD --help 2>&1 | $EGREP ': supported targets:.* elf' > /dev/null \ + && test "$tmp_diet" = no + then + tmp_addflag=' $pic_flag' + tmp_sharedflag='-shared' + case $cc_basename,$host_cpu in + pgcc*) # Portland Group C compiler + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` ${wl}--no-whole-archive' + tmp_addflag=' $pic_flag' + ;; + pgf77* | pgf90* | pgf95* | pgfortran*) + # Portland Group f77 and f90 compilers + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` ${wl}--no-whole-archive' + tmp_addflag=' $pic_flag -Mnomain' ;; + ecc*,ia64* | icc*,ia64*) # Intel C compiler on ia64 + tmp_addflag=' -i_dynamic' ;; + efc*,ia64* | ifort*,ia64*) # Intel Fortran compiler on ia64 + tmp_addflag=' -i_dynamic -nofor_main' ;; + ifc* | ifort*) # Intel Fortran compiler + tmp_addflag=' -nofor_main' ;; + lf95*) # Lahey Fortran 8.1 + _LT_TAGVAR(whole_archive_flag_spec, $1)= + tmp_sharedflag='--shared' ;; + xl[[cC]]* | bgxl[[cC]]* | mpixl[[cC]]*) # IBM XL C 8.0 on PPC (deal with xlf below) + tmp_sharedflag='-qmkshrobj' + tmp_addflag= ;; + nvcc*) # Cuda Compiler Driver 2.2 + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` ${wl}--no-whole-archive' + _LT_TAGVAR(compiler_needs_object, $1)=yes + ;; + esac + case `$CC -V 2>&1 | sed 5q` in + *Sun\ C*) # Sun C 5.9 + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` ${wl}--no-whole-archive' + _LT_TAGVAR(compiler_needs_object, $1)=yes + tmp_sharedflag='-G' ;; + *Sun\ F*) # Sun Fortran 8.3 + tmp_sharedflag='-G' ;; + esac + _LT_TAGVAR(archive_cmds, $1)='$CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + + if test "x$supports_anon_versioning" = xyes; then + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~ + cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~ + echo "local: *; };" >> $output_objdir/$libname.ver~ + $CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-version-script ${wl}$output_objdir/$libname.ver -o $lib' + fi + + case $cc_basename in + xlf* | bgf* | bgxlf* | mpixlf*) + # IBM XL Fortran 10.1 on PPC cannot create shared libs itself + _LT_TAGVAR(whole_archive_flag_spec, $1)='--whole-archive$convenience --no-whole-archive' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(archive_cmds, $1)='$LD -shared $libobjs $deplibs $linker_flags -soname $soname -o $lib' + if test "x$supports_anon_versioning" = xyes; then + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~ + cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~ + echo "local: *; };" >> $output_objdir/$libname.ver~ + $LD -shared $libobjs $deplibs $linker_flags -soname $soname -version-script $output_objdir/$libname.ver -o $lib' + fi + ;; + esac + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + + netbsd*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then + _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib' + wlarc= + else + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib' + fi + ;; + + solaris*) + if $LD -v 2>&1 | $GREP 'BFD 2\.8' > /dev/null; then + _LT_TAGVAR(ld_shlibs, $1)=no + cat <<_LT_EOF 1>&2 + +*** Warning: The releases 2.8.* of the GNU linker cannot reliably +*** create shared libraries on Solaris systems. Therefore, libtool +*** is disabling shared libraries support. We urge you to upgrade GNU +*** binutils to release 2.9.1 or newer. Another option is to modify +*** your PATH or compiler configuration so that the native linker is +*** used, and then restart. + +_LT_EOF + elif $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib' + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + + sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX*) + case `$LD -v 2>&1` in + *\ [[01]].* | *\ 2.[[0-9]].* | *\ 2.1[[0-5]].*) + _LT_TAGVAR(ld_shlibs, $1)=no + cat <<_LT_EOF 1>&2 + +*** Warning: Releases of the GNU linker prior to 2.16.91.0.3 can not +*** reliably create shared libraries on SCO systems. Therefore, libtool +*** is disabling shared libraries support. We urge you to upgrade GNU +*** binutils to release 2.16.91.0.3 or newer. Another option is to modify +*** your PATH or compiler configuration so that the native linker is +*** used, and then restart. + +_LT_EOF + ;; + *) + # For security reasons, it is highly recommended that you always + # use absolute paths for naming shared libraries, and exclude the + # DT_RUNPATH tag from executables and libraries. But doing so + # requires that you compile everything twice, which is a pain. + if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib' + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + esac + ;; + + sunos4*) + _LT_TAGVAR(archive_cmds, $1)='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags' + wlarc= + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + *) + if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib' + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + esac + + if test "$_LT_TAGVAR(ld_shlibs, $1)" = no; then + runpath_var= + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)= + _LT_TAGVAR(export_dynamic_flag_spec, $1)= + _LT_TAGVAR(whole_archive_flag_spec, $1)= + fi + else + # PORTME fill in a description of your system's linker (not GNU ld) + case $host_os in + aix3*) + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + _LT_TAGVAR(always_export_symbols, $1)=yes + _LT_TAGVAR(archive_expsym_cmds, $1)='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname' + # Note: this linker hardcodes the directories in LIBPATH if there + # are no directories specified by -L. + _LT_TAGVAR(hardcode_minus_L, $1)=yes + if test "$GCC" = yes && test -z "$lt_prog_compiler_static"; then + # Neither direct hardcoding nor static linking is supported with a + # broken collect2. + _LT_TAGVAR(hardcode_direct, $1)=unsupported + fi + ;; + + aix[[4-9]]*) + if test "$host_cpu" = ia64; then + # On IA64, the linker does run time linking by default, so we don't + # have to do anything special. + aix_use_runtimelinking=no + exp_sym_flag='-Bexport' + no_entry_flag="" + else + # If we're using GNU nm, then we don't want the "-C" option. + # -C means demangle to AIX nm, but means don't demangle with GNU nm + # Also, AIX nm treats weak defined symbols like other global + # defined symbols, whereas GNU nm marks them as "W". + if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then + _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' + else + _LT_TAGVAR(export_symbols_cmds, $1)='$NM -BCpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' + fi + aix_use_runtimelinking=no + + # Test if we are trying to use run time linking or normal + # AIX style linking. If -brtl is somewhere in LDFLAGS, we + # need to do runtime linking. + case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*) + for ld_flag in $LDFLAGS; do + if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl"); then + aix_use_runtimelinking=yes + break + fi + done + ;; + esac + + exp_sym_flag='-bexport' + no_entry_flag='-bnoentry' + fi + + # When large executables or shared objects are built, AIX ld can + # have problems creating the table of contents. If linking a library + # or program results in "error TOC overflow" add -mminimal-toc to + # CXXFLAGS/CFLAGS for g++/gcc. In the cases where that is not + # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS. + + _LT_TAGVAR(archive_cmds, $1)='' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_direct_absolute, $1)=yes + _LT_TAGVAR(hardcode_libdir_separator, $1)=':' + _LT_TAGVAR(link_all_deplibs, $1)=yes + _LT_TAGVAR(file_list_spec, $1)='${wl}-f,' + + if test "$GCC" = yes; then + case $host_os in aix4.[[012]]|aix4.[[012]].*) + # We only want to do this on AIX 4.2 and lower, the check + # below for broken collect2 doesn't work under 4.3+ + collect2name=`${CC} -print-prog-name=collect2` + if test -f "$collect2name" && + strings "$collect2name" | $GREP resolve_lib_name >/dev/null + then + # We have reworked collect2 + : + else + # We have old collect2 + _LT_TAGVAR(hardcode_direct, $1)=unsupported + # It fails to find uninstalled libraries when the uninstalled + # path is not listed in the libpath. Setting hardcode_minus_L + # to unsupported forces relinking + _LT_TAGVAR(hardcode_minus_L, $1)=yes + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)= + fi + ;; + esac + shared_flag='-shared' + if test "$aix_use_runtimelinking" = yes; then + shared_flag="$shared_flag "'${wl}-G' + fi + else + # not using gcc + if test "$host_cpu" = ia64; then + # VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release + # chokes on -Wl,-G. The following line is correct: + shared_flag='-G' + else + if test "$aix_use_runtimelinking" = yes; then + shared_flag='${wl}-G' + else + shared_flag='${wl}-bM:SRE' + fi + fi + fi + + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-bexpall' + # It seems that -bexpall does not export symbols beginning with + # underscore (_), so it is better to generate a list of symbols to export. + _LT_TAGVAR(always_export_symbols, $1)=yes + if test "$aix_use_runtimelinking" = yes; then + # Warning - without using the other runtime loading flags (-brtl), + # -berok will link without error, but may produce a broken library. + _LT_TAGVAR(allow_undefined_flag, $1)='-berok' + # Determine the default libpath from the value encoded in an + # empty executable. + _LT_SYS_MODULE_PATH_AIX([$1]) + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-blibpath:$libdir:'"$aix_libpath" + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags `if test "x${allow_undefined_flag}" != "x"; then func_echo_all "${wl}${allow_undefined_flag}"; else :; fi` '"\${wl}$exp_sym_flag:\$export_symbols $shared_flag" + else + if test "$host_cpu" = ia64; then + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R $libdir:/usr/lib:/lib' + _LT_TAGVAR(allow_undefined_flag, $1)="-z nodefs" + _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags ${wl}${allow_undefined_flag} '"\${wl}$exp_sym_flag:\$export_symbols" + else + # Determine the default libpath from the value encoded in an + # empty executable. + _LT_SYS_MODULE_PATH_AIX([$1]) + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-blibpath:$libdir:'"$aix_libpath" + # Warning - without using the other run time loading flags, + # -berok will link without error, but may produce a broken library. + _LT_TAGVAR(no_undefined_flag, $1)=' ${wl}-bernotok' + _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-berok' + if test "$with_gnu_ld" = yes; then + # We only use this code for GNU lds that support --whole-archive. + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive$convenience ${wl}--no-whole-archive' + else + # Exported symbols can be pulled into shared objects from archives + _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience' + fi + _LT_TAGVAR(archive_cmds_need_lc, $1)=yes + # This is similar to how AIX traditionally builds its shared libraries. + _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs ${wl}-bnoentry $compiler_flags ${wl}-bE:$export_symbols${allow_undefined_flag}~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$soname' + fi + fi + ;; + + amigaos*) + case $host_cpu in + powerpc) + # see comment about AmigaOS4 .so support + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='' + ;; + m68k) + _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(hardcode_minus_L, $1)=yes + ;; + esac + ;; + + bsdi[[45]]*) + _LT_TAGVAR(export_dynamic_flag_spec, $1)=-rdynamic + ;; + + cygwin* | mingw* | pw32* | cegcc*) + # When not using gcc, we currently assume that we are using + # Microsoft Visual C++. + # hardcode_libdir_flag_spec is actually meaningless, as there is + # no search path for DLLs. + case $cc_basename in + cl*) + # Native MSVC + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=' ' + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + _LT_TAGVAR(always_export_symbols, $1)=yes + _LT_TAGVAR(file_list_spec, $1)='@' + # Tell ltmain to make .lib files, not .a files. + libext=lib + # Tell ltmain to make .dll files, not .so files. + shrext_cmds=".dll" + # FIXME: Setting linknames here is a bad hack. + _LT_TAGVAR(archive_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $compiler_flags $deplibs -Wl,-dll~linknames=' + _LT_TAGVAR(archive_expsym_cmds, $1)='if test "x`$SED 1q $export_symbols`" = xEXPORTS; then + sed -n -e 's/\\\\\\\(.*\\\\\\\)/-link\\\ -EXPORT:\\\\\\\1/' -e '1\\\!p' < $export_symbols > $output_objdir/$soname.exp; + else + sed -e 's/\\\\\\\(.*\\\\\\\)/-link\\\ -EXPORT:\\\\\\\1/' < $export_symbols > $output_objdir/$soname.exp; + fi~ + $CC -o $tool_output_objdir$soname $libobjs $compiler_flags $deplibs "@$tool_output_objdir$soname.exp" -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~ + linknames=' + # The linker will not automatically build a static lib if we build a DLL. + # _LT_TAGVAR(old_archive_from_new_cmds, $1)='true' + _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes + _LT_TAGVAR(exclude_expsyms, $1)='_NULL_IMPORT_DESCRIPTOR|_IMPORT_DESCRIPTOR_.*' + _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[[BCDGRS]][[ ]]/s/.*[[ ]]\([[^ ]]*\)/\1,DATA/'\'' | $SED -e '\''/^[[AITW]][[ ]]/s/.*[[ ]]//'\'' | sort | uniq > $export_symbols' + # Don't use ranlib + _LT_TAGVAR(old_postinstall_cmds, $1)='chmod 644 $oldlib' + _LT_TAGVAR(postlink_cmds, $1)='lt_outputfile="@OUTPUT@"~ + lt_tool_outputfile="@TOOL_OUTPUT@"~ + case $lt_outputfile in + *.exe|*.EXE) ;; + *) + lt_outputfile="$lt_outputfile.exe" + lt_tool_outputfile="$lt_tool_outputfile.exe" + ;; + esac~ + if test "$MANIFEST_TOOL" != ":" && test -f "$lt_outputfile.manifest"; then + $MANIFEST_TOOL -manifest "$lt_tool_outputfile.manifest" -outputresource:"$lt_tool_outputfile" || exit 1; + $RM "$lt_outputfile.manifest"; + fi' + ;; + *) + # Assume MSVC wrapper + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=' ' + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + # Tell ltmain to make .lib files, not .a files. + libext=lib + # Tell ltmain to make .dll files, not .so files. + shrext_cmds=".dll" + # FIXME: Setting linknames here is a bad hack. + _LT_TAGVAR(archive_cmds, $1)='$CC -o $lib $libobjs $compiler_flags `func_echo_all "$deplibs" | $SED '\''s/ -lc$//'\''` -link -dll~linknames=' + # The linker will automatically build a .lib file if we build a DLL. + _LT_TAGVAR(old_archive_from_new_cmds, $1)='true' + # FIXME: Should let the user specify the lib program. + _LT_TAGVAR(old_archive_cmds, $1)='lib -OUT:$oldlib$oldobjs$old_deplibs' + _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes + ;; + esac + ;; + + darwin* | rhapsody*) + _LT_DARWIN_LINKER_FEATURES($1) + ;; + + dgux*) + _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor + # support. Future versions do this automatically, but an explicit c++rt0.o + # does not break anything, and helps significantly (at the cost of a little + # extra space). + freebsd2.2*) + _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags /usr/lib/c++rt0.o' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + # Unfortunately, older versions of FreeBSD 2 do not have this feature. + freebsd2.*) + _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_minus_L, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + # FreeBSD 3 and greater uses gcc -shared to do shared libraries. + freebsd* | dragonfly*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + hpux9*) + if test "$GCC" = yes; then + _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -shared $pic_flag ${wl}+b ${wl}$install_libdir -o $output_objdir/$soname $libobjs $deplibs $compiler_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib' + else + _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$LD -b +b $install_libdir -o $output_objdir/$soname $libobjs $deplibs $linker_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib' + fi + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + _LT_TAGVAR(hardcode_direct, $1)=yes + + # hardcode_minus_L: Not really in the search PATH, + # but as the default location of the library. + _LT_TAGVAR(hardcode_minus_L, $1)=yes + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + ;; + + hpux10*) + if test "$GCC" = yes && test "$with_gnu_ld" = no; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags' + else + _LT_TAGVAR(archive_cmds, $1)='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags' + fi + if test "$with_gnu_ld" = no; then + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_direct_absolute, $1)=yes + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + # hardcode_minus_L: Not really in the search PATH, + # but as the default location of the library. + _LT_TAGVAR(hardcode_minus_L, $1)=yes + fi + ;; + + hpux11*) + if test "$GCC" = yes && test "$with_gnu_ld" = no; then + case $host_cpu in + hppa*64*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}+h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags' + ;; + ia64*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags' + ;; + *) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags' + ;; + esac + else + case $host_cpu in + hppa*64*) + _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags' + ;; + ia64*) + _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags' + ;; + *) + m4_if($1, [], [ + # Older versions of the 11.00 compiler do not understand -b yet + # (HP92453-01 A.11.01.20 doesn't, HP92453-01 B.11.X.35175-35176.GP does) + _LT_LINKER_OPTION([if $CC understands -b], + _LT_TAGVAR(lt_cv_prog_compiler__b, $1), [-b], + [_LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags'], + [_LT_TAGVAR(archive_cmds, $1)='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags'])], + [_LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags']) + ;; + esac + fi + if test "$with_gnu_ld" = no; then + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + + case $host_cpu in + hppa*64*|ia64*) + _LT_TAGVAR(hardcode_direct, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + *) + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_direct_absolute, $1)=yes + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + + # hardcode_minus_L: Not really in the search PATH, + # but as the default location of the library. + _LT_TAGVAR(hardcode_minus_L, $1)=yes + ;; + esac + fi + ;; + + irix5* | irix6* | nonstopux*) + if test "$GCC" = yes; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib' + # Try to use the -exported_symbol ld option, if it does not + # work, assume that -exports_file does not work either and + # implicitly export all symbols. + # This should be the same for all languages, so no per-tag cache variable. + AC_CACHE_CHECK([whether the $host_os linker accepts -exported_symbol], + [lt_cv_irix_exported_symbol], + [save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -shared ${wl}-exported_symbol ${wl}foo ${wl}-update_registry ${wl}/dev/null" + AC_LINK_IFELSE( + [AC_LANG_SOURCE( + [AC_LANG_CASE([C], [[int foo (void) { return 0; }]], + [C++], [[int foo (void) { return 0; }]], + [Fortran 77], [[ + subroutine foo + end]], + [Fortran], [[ + subroutine foo + end]])])], + [lt_cv_irix_exported_symbol=yes], + [lt_cv_irix_exported_symbol=no]) + LDFLAGS="$save_LDFLAGS"]) + if test "$lt_cv_irix_exported_symbol" = yes; then + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations ${wl}-exports_file ${wl}$export_symbols -o $lib' + fi + else + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -exports_file $export_symbols -o $lib' + fi + _LT_TAGVAR(archive_cmds_need_lc, $1)='no' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + _LT_TAGVAR(inherit_rpath, $1)=yes + _LT_TAGVAR(link_all_deplibs, $1)=yes + ;; + + netbsd*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then + _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags' # a.out + else + _LT_TAGVAR(archive_cmds, $1)='$LD -shared -o $lib $libobjs $deplibs $linker_flags' # ELF + fi + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + newsos6) + _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + *nto* | *qnx*) + ;; + + openbsd*) + if test -f /usr/libexec/ld.so; then + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + _LT_TAGVAR(hardcode_direct_absolute, $1)=yes + if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags ${wl}-retain-symbols-file,$export_symbols' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + else + case $host_os in + openbsd[[01]].* | openbsd2.[[0-7]] | openbsd2.[[0-7]].*) + _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' + ;; + *) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir' + ;; + esac + fi + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + + os2*) + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(hardcode_minus_L, $1)=yes + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + _LT_TAGVAR(archive_cmds, $1)='$ECHO "LIBRARY $libname INITINSTANCE" > $output_objdir/$libname.def~$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~echo DATA >> $output_objdir/$libname.def~echo " SINGLE NONSHARED" >> $output_objdir/$libname.def~echo EXPORTS >> $output_objdir/$libname.def~emxexp $libobjs >> $output_objdir/$libname.def~$CC -Zdll -Zcrtdll -o $lib $libobjs $deplibs $compiler_flags $output_objdir/$libname.def' + _LT_TAGVAR(old_archive_from_new_cmds, $1)='emximp -o $output_objdir/$libname.a $output_objdir/$libname.def' + ;; + + osf3*) + if test "$GCC" = yes; then + _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*' + _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib' + else + _LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*' + _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib' + fi + _LT_TAGVAR(archive_cmds_need_lc, $1)='no' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + ;; + + osf4* | osf5*) # as osf3* with the addition of -msym flag + if test "$GCC" = yes; then + _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*' + _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $pic_flag $libobjs $deplibs $compiler_flags ${wl}-msym ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + else + _LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*' + _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done; printf "%s\\n" "-hidden">> $lib.exp~ + $CC -shared${allow_undefined_flag} ${wl}-input ${wl}$lib.exp $compiler_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib~$RM $lib.exp' + + # Both c and cxx compiler support -rpath directly + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir' + fi + _LT_TAGVAR(archive_cmds_need_lc, $1)='no' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + ;; + + solaris*) + _LT_TAGVAR(no_undefined_flag, $1)=' -z defs' + if test "$GCC" = yes; then + wlarc='${wl}' + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag ${wl}-z ${wl}text ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $CC -shared $pic_flag ${wl}-z ${wl}text ${wl}-M ${wl}$lib.exp ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' + else + case `$CC -V 2>&1` in + *"Compilers 5.0"*) + wlarc='' + _LT_TAGVAR(archive_cmds, $1)='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp' + ;; + *) + wlarc='${wl}' + _LT_TAGVAR(archive_cmds, $1)='$CC -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $CC -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' + ;; + esac + fi + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + case $host_os in + solaris2.[[0-5]] | solaris2.[[0-5]].*) ;; + *) + # The compiler driver will combine and reorder linker options, + # but understands `-z linker_flag'. GCC discards it without `$wl', + # but is careful enough not to reorder. + # Supported since Solaris 2.6 (maybe 2.5.1?) + if test "$GCC" = yes; then + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract' + else + _LT_TAGVAR(whole_archive_flag_spec, $1)='-z allextract$convenience -z defaultextract' + fi + ;; + esac + _LT_TAGVAR(link_all_deplibs, $1)=yes + ;; + + sunos4*) + if test "x$host_vendor" = xsequent; then + # Use $CC to link under sequent, because it throws in some extra .o + # files that make .init and .fini sections work. + _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h $soname -o $lib $libobjs $deplibs $compiler_flags' + else + _LT_TAGVAR(archive_cmds, $1)='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags' + fi + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_minus_L, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + sysv4) + case $host_vendor in + sni) + _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_direct, $1)=yes # is this really true??? + ;; + siemens) + ## LD is ld it makes a PLAMLIB + ## CC just makes a GrossModule. + _LT_TAGVAR(archive_cmds, $1)='$LD -G -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(reload_cmds, $1)='$CC -r -o $output$reload_objs' + _LT_TAGVAR(hardcode_direct, $1)=no + ;; + motorola) + _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_direct, $1)=no #Motorola manual says yes, but my tests say they lie + ;; + esac + runpath_var='LD_RUN_PATH' + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + sysv4.3*) + _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + _LT_TAGVAR(export_dynamic_flag_spec, $1)='-Bexport' + ;; + + sysv4*MP*) + if test -d /usr/nec; then + _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + runpath_var=LD_RUN_PATH + hardcode_runpath_var=yes + _LT_TAGVAR(ld_shlibs, $1)=yes + fi + ;; + + sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[[01]].[[10]]* | unixware7* | sco3.2v5.0.[[024]]*) + _LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text' + _LT_TAGVAR(archive_cmds_need_lc, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + runpath_var='LD_RUN_PATH' + + if test "$GCC" = yes; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + else + _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + fi + ;; + + sysv5* | sco3.2v5* | sco5v6*) + # Note: We can NOT use -z defs as we might desire, because we do not + # link with -lc, and that would cause any symbols used from libc to + # always be unresolved, which means just about no library would + # ever link correctly. If we're not using GNU ld we use -z text + # though, which does catch some bad symbols but isn't as heavy-handed + # as -z defs. + _LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text' + _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-z,nodefs' + _LT_TAGVAR(archive_cmds_need_lc, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R,$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=':' + _LT_TAGVAR(link_all_deplibs, $1)=yes + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-Bexport' + runpath_var='LD_RUN_PATH' + + if test "$GCC" = yes; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + else + _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + fi + ;; + + uts4*) + _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + + *) + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + esac + + if test x$host_vendor = xsni; then + case $host in + sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*) + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-Blargedynsym' + ;; + esac + fi + fi +]) +AC_MSG_RESULT([$_LT_TAGVAR(ld_shlibs, $1)]) +test "$_LT_TAGVAR(ld_shlibs, $1)" = no && can_build_shared=no + +_LT_TAGVAR(with_gnu_ld, $1)=$with_gnu_ld + +_LT_DECL([], [libext], [0], [Old archive suffix (normally "a")])dnl +_LT_DECL([], [shrext_cmds], [1], [Shared library suffix (normally ".so")])dnl +_LT_DECL([], [extract_expsyms_cmds], [2], + [The commands to extract the exported symbol list from a shared archive]) + +# +# Do we need to explicitly link libc? +# +case "x$_LT_TAGVAR(archive_cmds_need_lc, $1)" in +x|xyes) + # Assume -lc should be added + _LT_TAGVAR(archive_cmds_need_lc, $1)=yes + + if test "$enable_shared" = yes && test "$GCC" = yes; then + case $_LT_TAGVAR(archive_cmds, $1) in + *'~'*) + # FIXME: we may have to deal with multi-command sequences. + ;; + '$CC '*) + # Test whether the compiler implicitly links with -lc since on some + # systems, -lgcc has to come before -lc. If gcc already passes -lc + # to ld, don't add -lc before -lgcc. + AC_CACHE_CHECK([whether -lc should be explicitly linked in], + [lt_cv_]_LT_TAGVAR(archive_cmds_need_lc, $1), + [$RM conftest* + echo "$lt_simple_compile_test_code" > conftest.$ac_ext + + if AC_TRY_EVAL(ac_compile) 2>conftest.err; then + soname=conftest + lib=conftest + libobjs=conftest.$ac_objext + deplibs= + wl=$_LT_TAGVAR(lt_prog_compiler_wl, $1) + pic_flag=$_LT_TAGVAR(lt_prog_compiler_pic, $1) + compiler_flags=-v + linker_flags=-v + verstring= + output_objdir=. + libname=conftest + lt_save_allow_undefined_flag=$_LT_TAGVAR(allow_undefined_flag, $1) + _LT_TAGVAR(allow_undefined_flag, $1)= + if AC_TRY_EVAL(_LT_TAGVAR(archive_cmds, $1) 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1) + then + lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1)=no + else + lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1)=yes + fi + _LT_TAGVAR(allow_undefined_flag, $1)=$lt_save_allow_undefined_flag + else + cat conftest.err 1>&5 + fi + $RM conftest* + ]) + _LT_TAGVAR(archive_cmds_need_lc, $1)=$lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1) + ;; + esac + fi + ;; +esac + +_LT_TAGDECL([build_libtool_need_lc], [archive_cmds_need_lc], [0], + [Whether or not to add -lc for building shared libraries]) +_LT_TAGDECL([allow_libtool_libs_with_static_runtimes], + [enable_shared_with_static_runtimes], [0], + [Whether or not to disallow shared libs when runtime libs are static]) +_LT_TAGDECL([], [export_dynamic_flag_spec], [1], + [Compiler flag to allow reflexive dlopens]) +_LT_TAGDECL([], [whole_archive_flag_spec], [1], + [Compiler flag to generate shared objects directly from archives]) +_LT_TAGDECL([], [compiler_needs_object], [1], + [Whether the compiler copes with passing no objects directly]) +_LT_TAGDECL([], [old_archive_from_new_cmds], [2], + [Create an old-style archive from a shared archive]) +_LT_TAGDECL([], [old_archive_from_expsyms_cmds], [2], + [Create a temporary old-style archive to link instead of a shared archive]) +_LT_TAGDECL([], [archive_cmds], [2], [Commands used to build a shared archive]) +_LT_TAGDECL([], [archive_expsym_cmds], [2]) +_LT_TAGDECL([], [module_cmds], [2], + [Commands used to build a loadable module if different from building + a shared archive.]) +_LT_TAGDECL([], [module_expsym_cmds], [2]) +_LT_TAGDECL([], [with_gnu_ld], [1], + [Whether we are building with GNU ld or not]) +_LT_TAGDECL([], [allow_undefined_flag], [1], + [Flag that allows shared libraries with undefined symbols to be built]) +_LT_TAGDECL([], [no_undefined_flag], [1], + [Flag that enforces no undefined symbols]) +_LT_TAGDECL([], [hardcode_libdir_flag_spec], [1], + [Flag to hardcode $libdir into a binary during linking. + This must work even if $libdir does not exist]) +_LT_TAGDECL([], [hardcode_libdir_separator], [1], + [Whether we need a single "-rpath" flag with a separated argument]) +_LT_TAGDECL([], [hardcode_direct], [0], + [Set to "yes" if using DIR/libNAME${shared_ext} during linking hardcodes + DIR into the resulting binary]) +_LT_TAGDECL([], [hardcode_direct_absolute], [0], + [Set to "yes" if using DIR/libNAME${shared_ext} during linking hardcodes + DIR into the resulting binary and the resulting library dependency is + "absolute", i.e impossible to change by setting ${shlibpath_var} if the + library is relocated]) +_LT_TAGDECL([], [hardcode_minus_L], [0], + [Set to "yes" if using the -LDIR flag during linking hardcodes DIR + into the resulting binary]) +_LT_TAGDECL([], [hardcode_shlibpath_var], [0], + [Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR + into the resulting binary]) +_LT_TAGDECL([], [hardcode_automatic], [0], + [Set to "yes" if building a shared library automatically hardcodes DIR + into the library and all subsequent libraries and executables linked + against it]) +_LT_TAGDECL([], [inherit_rpath], [0], + [Set to yes if linker adds runtime paths of dependent libraries + to runtime path list]) +_LT_TAGDECL([], [link_all_deplibs], [0], + [Whether libtool must link a program against all its dependency libraries]) +_LT_TAGDECL([], [always_export_symbols], [0], + [Set to "yes" if exported symbols are required]) +_LT_TAGDECL([], [export_symbols_cmds], [2], + [The commands to list exported symbols]) +_LT_TAGDECL([], [exclude_expsyms], [1], + [Symbols that should not be listed in the preloaded symbols]) +_LT_TAGDECL([], [include_expsyms], [1], + [Symbols that must always be exported]) +_LT_TAGDECL([], [prelink_cmds], [2], + [Commands necessary for linking programs (against libraries) with templates]) +_LT_TAGDECL([], [postlink_cmds], [2], + [Commands necessary for finishing linking programs]) +_LT_TAGDECL([], [file_list_spec], [1], + [Specify filename containing input files]) +dnl FIXME: Not yet implemented +dnl _LT_TAGDECL([], [thread_safe_flag_spec], [1], +dnl [Compiler flag to generate thread safe objects]) +])# _LT_LINKER_SHLIBS + + +# _LT_LANG_C_CONFIG([TAG]) +# ------------------------ +# Ensure that the configuration variables for a C compiler are suitably +# defined. These variables are subsequently used by _LT_CONFIG to write +# the compiler configuration to `libtool'. +m4_defun([_LT_LANG_C_CONFIG], +[m4_require([_LT_DECL_EGREP])dnl +lt_save_CC="$CC" +AC_LANG_PUSH(C) + +# Source file extension for C test sources. +ac_ext=c + +# Object file extension for compiled C test sources. +objext=o +_LT_TAGVAR(objext, $1)=$objext + +# Code to be used in simple compile tests +lt_simple_compile_test_code="int some_variable = 0;" + +# Code to be used in simple link tests +lt_simple_link_test_code='int main(){return(0);}' + +_LT_TAG_COMPILER +# Save the default compiler, since it gets overwritten when the other +# tags are being tested, and _LT_TAGVAR(compiler, []) is a NOP. +compiler_DEFAULT=$CC + +# save warnings/boilerplate of simple test code +_LT_COMPILER_BOILERPLATE +_LT_LINKER_BOILERPLATE + +## CAVEAT EMPTOR: +## There is no encapsulation within the following macros, do not change +## the running order or otherwise move them around unless you know exactly +## what you are doing... +if test -n "$compiler"; then + _LT_COMPILER_NO_RTTI($1) + _LT_COMPILER_PIC($1) + _LT_COMPILER_C_O($1) + _LT_COMPILER_FILE_LOCKS($1) + _LT_LINKER_SHLIBS($1) + _LT_SYS_DYNAMIC_LINKER($1) + _LT_LINKER_HARDCODE_LIBPATH($1) + LT_SYS_DLOPEN_SELF + _LT_CMD_STRIPLIB + + # Report which library types will actually be built + AC_MSG_CHECKING([if libtool supports shared libraries]) + AC_MSG_RESULT([$can_build_shared]) + + AC_MSG_CHECKING([whether to build shared libraries]) + test "$can_build_shared" = "no" && enable_shared=no + + # On AIX, shared libraries and static libraries use the same namespace, and + # are all built from PIC. + case $host_os in + aix3*) + test "$enable_shared" = yes && enable_static=no + if test -n "$RANLIB"; then + archive_cmds="$archive_cmds~\$RANLIB \$lib" + postinstall_cmds='$RANLIB $lib' + fi + ;; + + aix[[4-9]]*) + if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then + test "$enable_shared" = yes && enable_static=no + fi + ;; + esac + AC_MSG_RESULT([$enable_shared]) + + AC_MSG_CHECKING([whether to build static libraries]) + # Make sure either enable_shared or enable_static is yes. + test "$enable_shared" = yes || enable_static=yes + AC_MSG_RESULT([$enable_static]) + + _LT_CONFIG($1) +fi +AC_LANG_POP +CC="$lt_save_CC" +])# _LT_LANG_C_CONFIG + + +# _LT_LANG_CXX_CONFIG([TAG]) +# -------------------------- +# Ensure that the configuration variables for a C++ compiler are suitably +# defined. These variables are subsequently used by _LT_CONFIG to write +# the compiler configuration to `libtool'. +m4_defun([_LT_LANG_CXX_CONFIG], +[m4_require([_LT_FILEUTILS_DEFAULTS])dnl +m4_require([_LT_DECL_EGREP])dnl +m4_require([_LT_PATH_MANIFEST_TOOL])dnl +if test -n "$CXX" && ( test "X$CXX" != "Xno" && + ( (test "X$CXX" = "Xg++" && `g++ -v >/dev/null 2>&1` ) || + (test "X$CXX" != "Xg++"))) ; then + AC_PROG_CXXCPP +else + _lt_caught_CXX_error=yes +fi + +AC_LANG_PUSH(C++) +_LT_TAGVAR(archive_cmds_need_lc, $1)=no +_LT_TAGVAR(allow_undefined_flag, $1)= +_LT_TAGVAR(always_export_symbols, $1)=no +_LT_TAGVAR(archive_expsym_cmds, $1)= +_LT_TAGVAR(compiler_needs_object, $1)=no +_LT_TAGVAR(export_dynamic_flag_spec, $1)= +_LT_TAGVAR(hardcode_direct, $1)=no +_LT_TAGVAR(hardcode_direct_absolute, $1)=no +_LT_TAGVAR(hardcode_libdir_flag_spec, $1)= +_LT_TAGVAR(hardcode_libdir_separator, $1)= +_LT_TAGVAR(hardcode_minus_L, $1)=no +_LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported +_LT_TAGVAR(hardcode_automatic, $1)=no +_LT_TAGVAR(inherit_rpath, $1)=no +_LT_TAGVAR(module_cmds, $1)= +_LT_TAGVAR(module_expsym_cmds, $1)= +_LT_TAGVAR(link_all_deplibs, $1)=unknown +_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds +_LT_TAGVAR(reload_flag, $1)=$reload_flag +_LT_TAGVAR(reload_cmds, $1)=$reload_cmds +_LT_TAGVAR(no_undefined_flag, $1)= +_LT_TAGVAR(whole_archive_flag_spec, $1)= +_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no + +# Source file extension for C++ test sources. +ac_ext=cpp + +# Object file extension for compiled C++ test sources. +objext=o +_LT_TAGVAR(objext, $1)=$objext + +# No sense in running all these tests if we already determined that +# the CXX compiler isn't working. Some variables (like enable_shared) +# are currently assumed to apply to all compilers on this platform, +# and will be corrupted by setting them based on a non-working compiler. +if test "$_lt_caught_CXX_error" != yes; then + # Code to be used in simple compile tests + lt_simple_compile_test_code="int some_variable = 0;" + + # Code to be used in simple link tests + lt_simple_link_test_code='int main(int, char *[[]]) { return(0); }' + + # ltmain only uses $CC for tagged configurations so make sure $CC is set. + _LT_TAG_COMPILER + + # save warnings/boilerplate of simple test code + _LT_COMPILER_BOILERPLATE + _LT_LINKER_BOILERPLATE + + # Allow CC to be a program name with arguments. + lt_save_CC=$CC + lt_save_CFLAGS=$CFLAGS + lt_save_LD=$LD + lt_save_GCC=$GCC + GCC=$GXX + lt_save_with_gnu_ld=$with_gnu_ld + lt_save_path_LD=$lt_cv_path_LD + if test -n "${lt_cv_prog_gnu_ldcxx+set}"; then + lt_cv_prog_gnu_ld=$lt_cv_prog_gnu_ldcxx + else + $as_unset lt_cv_prog_gnu_ld + fi + if test -n "${lt_cv_path_LDCXX+set}"; then + lt_cv_path_LD=$lt_cv_path_LDCXX + else + $as_unset lt_cv_path_LD + fi + test -z "${LDCXX+set}" || LD=$LDCXX + CC=${CXX-"c++"} + CFLAGS=$CXXFLAGS + compiler=$CC + _LT_TAGVAR(compiler, $1)=$CC + _LT_CC_BASENAME([$compiler]) + + if test -n "$compiler"; then + # We don't want -fno-exception when compiling C++ code, so set the + # no_builtin_flag separately + if test "$GXX" = yes; then + _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -fno-builtin' + else + _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)= + fi + + if test "$GXX" = yes; then + # Set up default GNU C++ configuration + + LT_PATH_LD + + # Check if GNU C++ uses GNU ld as the underlying linker, since the + # archiving commands below assume that GNU ld is being used. + if test "$with_gnu_ld" = yes; then + _LT_TAGVAR(archive_cmds, $1)='$CC $pic_flag -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC $pic_flag -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib' + + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic' + + # If archive_cmds runs LD, not CC, wlarc should be empty + # XXX I think wlarc can be eliminated in ltcf-cxx, but I need to + # investigate it a little bit more. (MM) + wlarc='${wl}' + + # ancient GNU ld didn't support --whole-archive et. al. + if eval "`$CC -print-prog-name=ld` --help 2>&1" | + $GREP 'no-whole-archive' > /dev/null; then + _LT_TAGVAR(whole_archive_flag_spec, $1)="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive' + else + _LT_TAGVAR(whole_archive_flag_spec, $1)= + fi + else + with_gnu_ld=no + wlarc= + + # A generic and very simple default shared library creation + # command for GNU C++ for the case where it uses the native + # linker, instead of GNU ld. If possible, this setting should + # overridden to take advantage of the native linker features on + # the platform it is being used on. + _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib' + fi + + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"' + + else + GXX=no + with_gnu_ld=no + wlarc= + fi + + # PORTME: fill in a description of your system's C++ link characteristics + AC_MSG_CHECKING([whether the $compiler linker ($LD) supports shared libraries]) + _LT_TAGVAR(ld_shlibs, $1)=yes + case $host_os in + aix3*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + aix[[4-9]]*) + if test "$host_cpu" = ia64; then + # On IA64, the linker does run time linking by default, so we don't + # have to do anything special. + aix_use_runtimelinking=no + exp_sym_flag='-Bexport' + no_entry_flag="" + else + aix_use_runtimelinking=no + + # Test if we are trying to use run time linking or normal + # AIX style linking. If -brtl is somewhere in LDFLAGS, we + # need to do runtime linking. + case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*) + for ld_flag in $LDFLAGS; do + case $ld_flag in + *-brtl*) + aix_use_runtimelinking=yes + break + ;; + esac + done + ;; + esac + + exp_sym_flag='-bexport' + no_entry_flag='-bnoentry' + fi + + # When large executables or shared objects are built, AIX ld can + # have problems creating the table of contents. If linking a library + # or program results in "error TOC overflow" add -mminimal-toc to + # CXXFLAGS/CFLAGS for g++/gcc. In the cases where that is not + # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS. + + _LT_TAGVAR(archive_cmds, $1)='' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_direct_absolute, $1)=yes + _LT_TAGVAR(hardcode_libdir_separator, $1)=':' + _LT_TAGVAR(link_all_deplibs, $1)=yes + _LT_TAGVAR(file_list_spec, $1)='${wl}-f,' + + if test "$GXX" = yes; then + case $host_os in aix4.[[012]]|aix4.[[012]].*) + # We only want to do this on AIX 4.2 and lower, the check + # below for broken collect2 doesn't work under 4.3+ + collect2name=`${CC} -print-prog-name=collect2` + if test -f "$collect2name" && + strings "$collect2name" | $GREP resolve_lib_name >/dev/null + then + # We have reworked collect2 + : + else + # We have old collect2 + _LT_TAGVAR(hardcode_direct, $1)=unsupported + # It fails to find uninstalled libraries when the uninstalled + # path is not listed in the libpath. Setting hardcode_minus_L + # to unsupported forces relinking + _LT_TAGVAR(hardcode_minus_L, $1)=yes + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)= + fi + esac + shared_flag='-shared' + if test "$aix_use_runtimelinking" = yes; then + shared_flag="$shared_flag "'${wl}-G' + fi + else + # not using gcc + if test "$host_cpu" = ia64; then + # VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release + # chokes on -Wl,-G. The following line is correct: + shared_flag='-G' + else + if test "$aix_use_runtimelinking" = yes; then + shared_flag='${wl}-G' + else + shared_flag='${wl}-bM:SRE' + fi + fi + fi + + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-bexpall' + # It seems that -bexpall does not export symbols beginning with + # underscore (_), so it is better to generate a list of symbols to + # export. + _LT_TAGVAR(always_export_symbols, $1)=yes + if test "$aix_use_runtimelinking" = yes; then + # Warning - without using the other runtime loading flags (-brtl), + # -berok will link without error, but may produce a broken library. + _LT_TAGVAR(allow_undefined_flag, $1)='-berok' + # Determine the default libpath from the value encoded in an empty + # executable. + _LT_SYS_MODULE_PATH_AIX([$1]) + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-blibpath:$libdir:'"$aix_libpath" + + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags `if test "x${allow_undefined_flag}" != "x"; then func_echo_all "${wl}${allow_undefined_flag}"; else :; fi` '"\${wl}$exp_sym_flag:\$export_symbols $shared_flag" + else + if test "$host_cpu" = ia64; then + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R $libdir:/usr/lib:/lib' + _LT_TAGVAR(allow_undefined_flag, $1)="-z nodefs" + _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags ${wl}${allow_undefined_flag} '"\${wl}$exp_sym_flag:\$export_symbols" + else + # Determine the default libpath from the value encoded in an + # empty executable. + _LT_SYS_MODULE_PATH_AIX([$1]) + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-blibpath:$libdir:'"$aix_libpath" + # Warning - without using the other run time loading flags, + # -berok will link without error, but may produce a broken library. + _LT_TAGVAR(no_undefined_flag, $1)=' ${wl}-bernotok' + _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-berok' + if test "$with_gnu_ld" = yes; then + # We only use this code for GNU lds that support --whole-archive. + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive$convenience ${wl}--no-whole-archive' + else + # Exported symbols can be pulled into shared objects from archives + _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience' + fi + _LT_TAGVAR(archive_cmds_need_lc, $1)=yes + # This is similar to how AIX traditionally builds its shared + # libraries. + _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs ${wl}-bnoentry $compiler_flags ${wl}-bE:$export_symbols${allow_undefined_flag}~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$soname' + fi + fi + ;; + + beos*) + if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + # Joseph Beckenbach says some releases of gcc + # support --undefined. This deserves some investigation. FIXME + _LT_TAGVAR(archive_cmds, $1)='$CC -nostart $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + + chorus*) + case $cc_basename in + *) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + esac + ;; + + cygwin* | mingw* | pw32* | cegcc*) + case $GXX,$cc_basename in + ,cl* | no,cl*) + # Native MSVC + # hardcode_libdir_flag_spec is actually meaningless, as there is + # no search path for DLLs. + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=' ' + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + _LT_TAGVAR(always_export_symbols, $1)=yes + _LT_TAGVAR(file_list_spec, $1)='@' + # Tell ltmain to make .lib files, not .a files. + libext=lib + # Tell ltmain to make .dll files, not .so files. + shrext_cmds=".dll" + # FIXME: Setting linknames here is a bad hack. + _LT_TAGVAR(archive_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $compiler_flags $deplibs -Wl,-dll~linknames=' + _LT_TAGVAR(archive_expsym_cmds, $1)='if test "x`$SED 1q $export_symbols`" = xEXPORTS; then + $SED -n -e 's/\\\\\\\(.*\\\\\\\)/-link\\\ -EXPORT:\\\\\\\1/' -e '1\\\!p' < $export_symbols > $output_objdir/$soname.exp; + else + $SED -e 's/\\\\\\\(.*\\\\\\\)/-link\\\ -EXPORT:\\\\\\\1/' < $export_symbols > $output_objdir/$soname.exp; + fi~ + $CC -o $tool_output_objdir$soname $libobjs $compiler_flags $deplibs "@$tool_output_objdir$soname.exp" -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~ + linknames=' + # The linker will not automatically build a static lib if we build a DLL. + # _LT_TAGVAR(old_archive_from_new_cmds, $1)='true' + _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes + # Don't use ranlib + _LT_TAGVAR(old_postinstall_cmds, $1)='chmod 644 $oldlib' + _LT_TAGVAR(postlink_cmds, $1)='lt_outputfile="@OUTPUT@"~ + lt_tool_outputfile="@TOOL_OUTPUT@"~ + case $lt_outputfile in + *.exe|*.EXE) ;; + *) + lt_outputfile="$lt_outputfile.exe" + lt_tool_outputfile="$lt_tool_outputfile.exe" + ;; + esac~ + func_to_tool_file "$lt_outputfile"~ + if test "$MANIFEST_TOOL" != ":" && test -f "$lt_outputfile.manifest"; then + $MANIFEST_TOOL -manifest "$lt_tool_outputfile.manifest" -outputresource:"$lt_tool_outputfile" || exit 1; + $RM "$lt_outputfile.manifest"; + fi' + ;; + *) + # g++ + # _LT_TAGVAR(hardcode_libdir_flag_spec, $1) is actually meaningless, + # as there is no search path for DLLs. + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-all-symbols' + _LT_TAGVAR(allow_undefined_flag, $1)=unsupported + _LT_TAGVAR(always_export_symbols, $1)=no + _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes + + if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib' + # If the export-symbols file already is a .def file (1st line + # is EXPORTS), use it as is; otherwise, prepend... + _LT_TAGVAR(archive_expsym_cmds, $1)='if test "x`$SED 1q $export_symbols`" = xEXPORTS; then + cp $export_symbols $output_objdir/$soname.def; + else + echo EXPORTS > $output_objdir/$soname.def; + cat $export_symbols >> $output_objdir/$soname.def; + fi~ + $CC -shared -nostdlib $output_objdir/$soname.def $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib' + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + esac + ;; + darwin* | rhapsody*) + _LT_DARWIN_LINKER_FEATURES($1) + ;; + + dgux*) + case $cc_basename in + ec++*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + ghcx*) + # Green Hills C++ Compiler + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + *) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + esac + ;; + + freebsd2.*) + # C++ shared libraries reported to be fairly broken before + # switch to ELF + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + + freebsd-elf*) + _LT_TAGVAR(archive_cmds_need_lc, $1)=no + ;; + + freebsd* | dragonfly*) + # FreeBSD 3 and later use GNU C++ and GNU ld with standard ELF + # conventions + _LT_TAGVAR(ld_shlibs, $1)=yes + ;; + + gnu*) + ;; + + haiku*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(link_all_deplibs, $1)=yes + ;; + + hpux9*) + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_minus_L, $1)=yes # Not in the search PATH, + # but as the default + # location of the library. + + case $cc_basename in + CC*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + aCC*) + _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -b ${wl}+b ${wl}$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib' + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + # + # There doesn't appear to be a way to prevent this compiler from + # explicitly linking system object files so we need to strip them + # from the output so that they don't get included in the library + # dependencies. + output_verbose_link_cmd='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | $EGREP "\-L"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"' + ;; + *) + if test "$GXX" = yes; then + _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -shared -nostdlib $pic_flag ${wl}+b ${wl}$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib' + else + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + esac + ;; + + hpux10*|hpux11*) + if test $with_gnu_ld = no; then + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + + case $host_cpu in + hppa*64*|ia64*) + ;; + *) + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + ;; + esac + fi + case $host_cpu in + hppa*64*|ia64*) + _LT_TAGVAR(hardcode_direct, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + ;; + *) + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_direct_absolute, $1)=yes + _LT_TAGVAR(hardcode_minus_L, $1)=yes # Not in the search PATH, + # but as the default + # location of the library. + ;; + esac + + case $cc_basename in + CC*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + aCC*) + case $host_cpu in + hppa*64*) + _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' + ;; + ia64*) + _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' + ;; + *) + _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' + ;; + esac + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + # + # There doesn't appear to be a way to prevent this compiler from + # explicitly linking system object files so we need to strip them + # from the output so that they don't get included in the library + # dependencies. + output_verbose_link_cmd='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | $GREP "\-L"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"' + ;; + *) + if test "$GXX" = yes; then + if test $with_gnu_ld = no; then + case $host_cpu in + hppa*64*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib -fPIC ${wl}+h ${wl}$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' + ;; + ia64*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $pic_flag ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' + ;; + *) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $pic_flag ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' + ;; + esac + fi + else + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + esac + ;; + + interix[[3-9]]*) + _LT_TAGVAR(hardcode_direct, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + # Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc. + # Instead, shared libraries are loaded at an image base (0x10000000 by + # default) and relocated if they conflict, which is a slow very memory + # consuming and fragmenting process. To avoid this, we pick a random, + # 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link + # time. Moving up from 0x10000000 also allows more sbrk(2) space. + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='sed "s,^,_," $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--retain-symbols-file,$output_objdir/$soname.expsym ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib' + ;; + irix5* | irix6*) + case $cc_basename in + CC*) + # SGI C++ + _LT_TAGVAR(archive_cmds, $1)='$CC -shared -all -multigot $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib' + + # Archives containing C++ object files must be created using + # "CC -ar", where "CC" is the IRIX C++ compiler. This is + # necessary to make sure instantiated templates are included + # in the archive. + _LT_TAGVAR(old_archive_cmds, $1)='$CC -ar -WR,-u -o $oldlib $oldobjs' + ;; + *) + if test "$GXX" = yes; then + if test "$with_gnu_ld" = no; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib' + else + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` -o $lib' + fi + fi + _LT_TAGVAR(link_all_deplibs, $1)=yes + ;; + esac + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + _LT_TAGVAR(inherit_rpath, $1)=yes + ;; + + linux* | k*bsd*-gnu | kopensolaris*-gnu) + case $cc_basename in + KCC*) + # Kuck and Associates, Inc. (KAI) C++ Compiler + + # KCC will only create a shared library if the output file + # ends with ".so" (or ".sl" for HP-UX), so rename the library + # to its proper name (with version) after linking. + _LT_TAGVAR(archive_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\${tempext}\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\${tempext}\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib ${wl}-retain-symbols-file,$export_symbols; mv \$templib $lib' + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + # + # There doesn't appear to be a way to prevent this compiler from + # explicitly linking system object files so we need to strip them + # from the output so that they don't get included in the library + # dependencies. + output_verbose_link_cmd='templist=`$CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1 | $GREP "ld"`; rm -f libconftest$shared_ext; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"' + + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic' + + # Archives containing C++ object files must be created using + # "CC -Bstatic", where "CC" is the KAI C++ compiler. + _LT_TAGVAR(old_archive_cmds, $1)='$CC -Bstatic -o $oldlib $oldobjs' + ;; + icpc* | ecpc* ) + # Intel C++ + with_gnu_ld=yes + # version 8.0 and above of icpc choke on multiply defined symbols + # if we add $predep_objects and $postdep_objects, however 7.1 and + # earlier do not add the objects themselves. + case `$CC -V 2>&1` in + *"Version 7."*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib' + ;; + *) # Version 8.0 or newer + tmp_idyn= + case $host_cpu in + ia64*) tmp_idyn=' -i_dynamic';; + esac + _LT_TAGVAR(archive_cmds, $1)='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib' + ;; + esac + _LT_TAGVAR(archive_cmds_need_lc, $1)=no + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic' + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive$convenience ${wl}--no-whole-archive' + ;; + pgCC* | pgcpp*) + # Portland Group C++ compiler + case `$CC -V` in + *pgCC\ [[1-5]].* | *pgcpp\ [[1-5]].*) + _LT_TAGVAR(prelink_cmds, $1)='tpldir=Template.dir~ + rm -rf $tpldir~ + $CC --prelink_objects --instantiation_dir $tpldir $objs $libobjs $compile_deplibs~ + compile_command="$compile_command `find $tpldir -name \*.o | sort | $NL2SP`"' + _LT_TAGVAR(old_archive_cmds, $1)='tpldir=Template.dir~ + rm -rf $tpldir~ + $CC --prelink_objects --instantiation_dir $tpldir $oldobjs$old_deplibs~ + $AR $AR_FLAGS $oldlib$oldobjs$old_deplibs `find $tpldir -name \*.o | sort | $NL2SP`~ + $RANLIB $oldlib' + _LT_TAGVAR(archive_cmds, $1)='tpldir=Template.dir~ + rm -rf $tpldir~ + $CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~ + $CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | sort | $NL2SP` $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='tpldir=Template.dir~ + rm -rf $tpldir~ + $CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~ + $CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | sort | $NL2SP` $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname ${wl}-retain-symbols-file ${wl}$export_symbols -o $lib' + ;; + *) # Version 6 and above use weak symbols + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname ${wl}-retain-symbols-file ${wl}$export_symbols -o $lib' + ;; + esac + + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}--rpath ${wl}$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic' + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` ${wl}--no-whole-archive' + ;; + cxx*) + # Compaq C++ + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib ${wl}-retain-symbols-file $wl$export_symbols' + + runpath_var=LD_RUN_PATH + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + # + # There doesn't appear to be a way to prevent this compiler from + # explicitly linking system object files so we need to strip them + # from the output so that they don't get included in the library + # dependencies. + output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld"`; templist=`func_echo_all "$templist" | $SED "s/\(^.*ld.*\)\( .*ld .*$\)/\1/"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "X$list" | $Xsed' + ;; + xl* | mpixl* | bgxl*) + # IBM XL 8.0 on PPC, with GNU ld + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic' + _LT_TAGVAR(archive_cmds, $1)='$CC -qmkshrobj $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib' + if test "x$supports_anon_versioning" = xyes; then + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~ + cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~ + echo "local: *; };" >> $output_objdir/$libname.ver~ + $CC -qmkshrobj $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-version-script ${wl}$output_objdir/$libname.ver -o $lib' + fi + ;; + *) + case `$CC -V 2>&1 | sed 5q` in + *Sun\ C*) + # Sun C++ 5.9 + _LT_TAGVAR(no_undefined_flag, $1)=' -zdefs' + _LT_TAGVAR(archive_cmds, $1)='$CC -G${allow_undefined_flag} -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G${allow_undefined_flag} -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-retain-symbols-file ${wl}$export_symbols' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` ${wl}--no-whole-archive' + _LT_TAGVAR(compiler_needs_object, $1)=yes + + # Not sure whether something based on + # $CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1 + # would be better. + output_verbose_link_cmd='func_echo_all' + + # Archives containing C++ object files must be created using + # "CC -xar", where "CC" is the Sun C++ compiler. This is + # necessary to make sure instantiated templates are included + # in the archive. + _LT_TAGVAR(old_archive_cmds, $1)='$CC -xar -o $oldlib $oldobjs' + ;; + esac + ;; + esac + ;; + + lynxos*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + + m88k*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + + mvs*) + case $cc_basename in + cxx*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + *) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + esac + ;; + + netbsd*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then + _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $predep_objects $libobjs $deplibs $postdep_objects $linker_flags' + wlarc= + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + fi + # Workaround some broken pre-1.5 toolchains + output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP conftest.$objext | $SED -e "s:-lgcc -lc -lgcc::"' + ;; + + *nto* | *qnx*) + _LT_TAGVAR(ld_shlibs, $1)=yes + ;; + + openbsd2*) + # C++ shared libraries are fairly broken + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + + openbsd*) + if test -f /usr/libexec/ld.so; then + _LT_TAGVAR(hardcode_direct, $1)=yes + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + _LT_TAGVAR(hardcode_direct_absolute, $1)=yes + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir' + if test -z "`echo __ELF__ | $CC -E - | grep __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-retain-symbols-file,$export_symbols -o $lib' + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E' + _LT_TAGVAR(whole_archive_flag_spec, $1)="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive' + fi + output_verbose_link_cmd=func_echo_all + else + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + + osf3* | osf4* | osf5*) + case $cc_basename in + KCC*) + # Kuck and Associates, Inc. (KAI) C++ Compiler + + # KCC will only create a shared library if the output file + # ends with ".so" (or ".sl" for HP-UX), so rename the library + # to its proper name (with version) after linking. + _LT_TAGVAR(archive_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo "$lib" | $SED -e "s/\${tempext}\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib' + + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + + # Archives containing C++ object files must be created using + # the KAI C++ compiler. + case $host in + osf3*) _LT_TAGVAR(old_archive_cmds, $1)='$CC -Bstatic -o $oldlib $oldobjs' ;; + *) _LT_TAGVAR(old_archive_cmds, $1)='$CC -o $oldlib $oldobjs' ;; + esac + ;; + RCC*) + # Rational C++ 2.4.1 + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + cxx*) + case $host in + osf3*) + _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*' + _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $soname `test -n "$verstring" && func_echo_all "${wl}-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + ;; + *) + _LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*' + _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done~ + echo "-hidden">> $lib.exp~ + $CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname ${wl}-input ${wl}$lib.exp `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib~ + $RM $lib.exp' + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir' + ;; + esac + + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + # + # There doesn't appear to be a way to prevent this compiler from + # explicitly linking system object files so we need to strip them + # from the output so that they don't get included in the library + # dependencies. + output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld" | $GREP -v "ld:"`; templist=`func_echo_all "$templist" | $SED "s/\(^.*ld.*\)\( .*ld.*$\)/\1/"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"' + ;; + *) + if test "$GXX" = yes && test "$with_gnu_ld" = no; then + _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*' + case $host in + osf3*) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib ${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib' + ;; + *) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -nostdlib ${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-msym ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib' + ;; + esac + + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=: + + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"' + + else + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + fi + ;; + esac + ;; + + psos*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + + sunos4*) + case $cc_basename in + CC*) + # Sun C++ 4.x + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + lcc*) + # Lucid + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + *) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + esac + ;; + + solaris*) + case $cc_basename in + CC* | sunCC*) + # Sun C++ 4.2, 5.x and Centerline C++ + _LT_TAGVAR(archive_cmds_need_lc,$1)=yes + _LT_TAGVAR(no_undefined_flag, $1)=' -zdefs' + _LT_TAGVAR(archive_cmds, $1)='$CC -G${allow_undefined_flag} -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $CC -G${allow_undefined_flag} ${wl}-M ${wl}$lib.exp -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp' + + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + case $host_os in + solaris2.[[0-5]] | solaris2.[[0-5]].*) ;; + *) + # The compiler driver will combine and reorder linker options, + # but understands `-z linker_flag'. + # Supported since Solaris 2.6 (maybe 2.5.1?) + _LT_TAGVAR(whole_archive_flag_spec, $1)='-z allextract$convenience -z defaultextract' + ;; + esac + _LT_TAGVAR(link_all_deplibs, $1)=yes + + output_verbose_link_cmd='func_echo_all' + + # Archives containing C++ object files must be created using + # "CC -xar", where "CC" is the Sun C++ compiler. This is + # necessary to make sure instantiated templates are included + # in the archive. + _LT_TAGVAR(old_archive_cmds, $1)='$CC -xar -o $oldlib $oldobjs' + ;; + gcx*) + # Green Hills C++ Compiler + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib' + + # The C++ compiler must be used to create the archive. + _LT_TAGVAR(old_archive_cmds, $1)='$CC $LDFLAGS -archive -o $oldlib $oldobjs' + ;; + *) + # GNU C++ compiler with Solaris linker + if test "$GXX" = yes && test "$with_gnu_ld" = no; then + _LT_TAGVAR(no_undefined_flag, $1)=' ${wl}-z ${wl}defs' + if $CC --version | $GREP -v '^2\.7' > /dev/null; then + _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -nostdlib $LDFLAGS $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $CC -shared $pic_flag -nostdlib ${wl}-M $wl$lib.exp -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp' + + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"' + else + # g++ 2.7 appears to require `-G' NOT `-shared' on this + # platform. + _LT_TAGVAR(archive_cmds, $1)='$CC -G -nostdlib $LDFLAGS $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib' + _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $CC -G -nostdlib ${wl}-M $wl$lib.exp -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp' + + # Commands to make compiler produce verbose output that lists + # what "hidden" libraries, object files and flags are used when + # linking a shared library. + output_verbose_link_cmd='$CC -G $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"' + fi + + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R $wl$libdir' + case $host_os in + solaris2.[[0-5]] | solaris2.[[0-5]].*) ;; + *) + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract' + ;; + esac + fi + ;; + esac + ;; + + sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[[01]].[[10]]* | unixware7* | sco3.2v5.0.[[024]]*) + _LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text' + _LT_TAGVAR(archive_cmds_need_lc, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + runpath_var='LD_RUN_PATH' + + case $cc_basename in + CC*) + _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + ;; + *) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + ;; + esac + ;; + + sysv5* | sco3.2v5* | sco5v6*) + # Note: We can NOT use -z defs as we might desire, because we do not + # link with -lc, and that would cause any symbols used from libc to + # always be unresolved, which means just about no library would + # ever link correctly. If we're not using GNU ld we use -z text + # though, which does catch some bad symbols but isn't as heavy-handed + # as -z defs. + _LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text' + _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-z,nodefs' + _LT_TAGVAR(archive_cmds_need_lc, $1)=no + _LT_TAGVAR(hardcode_shlibpath_var, $1)=no + _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R,$libdir' + _LT_TAGVAR(hardcode_libdir_separator, $1)=':' + _LT_TAGVAR(link_all_deplibs, $1)=yes + _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-Bexport' + runpath_var='LD_RUN_PATH' + + case $cc_basename in + CC*) + _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(old_archive_cmds, $1)='$CC -Tprelink_objects $oldobjs~ + '"$_LT_TAGVAR(old_archive_cmds, $1)" + _LT_TAGVAR(reload_cmds, $1)='$CC -Tprelink_objects $reload_objs~ + '"$_LT_TAGVAR(reload_cmds, $1)" + ;; + *) + _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + ;; + esac + ;; + + tandem*) + case $cc_basename in + NCC*) + # NonStop-UX NCC 3.20 + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + *) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + esac + ;; + + vxworks*) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + + *) + # FIXME: insert proper C++ library support + _LT_TAGVAR(ld_shlibs, $1)=no + ;; + esac + + AC_MSG_RESULT([$_LT_TAGVAR(ld_shlibs, $1)]) + test "$_LT_TAGVAR(ld_shlibs, $1)" = no && can_build_shared=no + + _LT_TAGVAR(GCC, $1)="$GXX" + _LT_TAGVAR(LD, $1)="$LD" + + ## CAVEAT EMPTOR: + ## There is no encapsulation within the following macros, do not change + ## the running order or otherwise move them around unless you know exactly + ## what you are doing... + _LT_SYS_HIDDEN_LIBDEPS($1) + _LT_COMPILER_PIC($1) + _LT_COMPILER_C_O($1) + _LT_COMPILER_FILE_LOCKS($1) + _LT_LINKER_SHLIBS($1) + _LT_SYS_DYNAMIC_LINKER($1) + _LT_LINKER_HARDCODE_LIBPATH($1) + + _LT_CONFIG($1) + fi # test -n "$compiler" + + CC=$lt_save_CC + CFLAGS=$lt_save_CFLAGS + LDCXX=$LD + LD=$lt_save_LD + GCC=$lt_save_GCC + with_gnu_ld=$lt_save_with_gnu_ld + lt_cv_path_LDCXX=$lt_cv_path_LD + lt_cv_path_LD=$lt_save_path_LD + lt_cv_prog_gnu_ldcxx=$lt_cv_prog_gnu_ld + lt_cv_prog_gnu_ld=$lt_save_with_gnu_ld +fi # test "$_lt_caught_CXX_error" != yes + +AC_LANG_POP +])# _LT_LANG_CXX_CONFIG + + +# _LT_FUNC_STRIPNAME_CNF +# ---------------------- +# func_stripname_cnf prefix suffix name +# strip PREFIX and SUFFIX off of NAME. +# PREFIX and SUFFIX must not contain globbing or regex special +# characters, hashes, percent signs, but SUFFIX may contain a leading +# dot (in which case that matches only a dot). +# +# This function is identical to the (non-XSI) version of func_stripname, +# except this one can be used by m4 code that may be executed by configure, +# rather than the libtool script. +m4_defun([_LT_FUNC_STRIPNAME_CNF],[dnl +AC_REQUIRE([_LT_DECL_SED]) +AC_REQUIRE([_LT_PROG_ECHO_BACKSLASH]) +func_stripname_cnf () +{ + case ${2} in + .*) func_stripname_result=`$ECHO "${3}" | $SED "s%^${1}%%; s%\\\\${2}\$%%"`;; + *) func_stripname_result=`$ECHO "${3}" | $SED "s%^${1}%%; s%${2}\$%%"`;; + esac +} # func_stripname_cnf +])# _LT_FUNC_STRIPNAME_CNF + +# _LT_SYS_HIDDEN_LIBDEPS([TAGNAME]) +# --------------------------------- +# Figure out "hidden" library dependencies from verbose +# compiler output when linking a shared library. +# Parse the compiler output and extract the necessary +# objects, libraries and library flags. +m4_defun([_LT_SYS_HIDDEN_LIBDEPS], +[m4_require([_LT_FILEUTILS_DEFAULTS])dnl +AC_REQUIRE([_LT_FUNC_STRIPNAME_CNF])dnl +# Dependencies to place before and after the object being linked: +_LT_TAGVAR(predep_objects, $1)= +_LT_TAGVAR(postdep_objects, $1)= +_LT_TAGVAR(predeps, $1)= +_LT_TAGVAR(postdeps, $1)= +_LT_TAGVAR(compiler_lib_search_path, $1)= + +dnl we can't use the lt_simple_compile_test_code here, +dnl because it contains code intended for an executable, +dnl not a library. It's possible we should let each +dnl tag define a new lt_????_link_test_code variable, +dnl but it's only used here... +m4_if([$1], [], [cat > conftest.$ac_ext <<_LT_EOF +int a; +void foo (void) { a = 0; } +_LT_EOF +], [$1], [CXX], [cat > conftest.$ac_ext <<_LT_EOF +class Foo +{ +public: + Foo (void) { a = 0; } +private: + int a; +}; +_LT_EOF +], [$1], [F77], [cat > conftest.$ac_ext <<_LT_EOF + subroutine foo + implicit none + integer*4 a + a=0 + return + end +_LT_EOF +], [$1], [FC], [cat > conftest.$ac_ext <<_LT_EOF + subroutine foo + implicit none + integer a + a=0 + return + end +_LT_EOF +], [$1], [GCJ], [cat > conftest.$ac_ext <<_LT_EOF +public class foo { + private int a; + public void bar (void) { + a = 0; + } +}; +_LT_EOF +], [$1], [GO], [cat > conftest.$ac_ext <<_LT_EOF +package foo +func foo() { +} +_LT_EOF +]) + +_lt_libdeps_save_CFLAGS=$CFLAGS +case "$CC $CFLAGS " in #( +*\ -flto*\ *) CFLAGS="$CFLAGS -fno-lto" ;; +*\ -fwhopr*\ *) CFLAGS="$CFLAGS -fno-whopr" ;; +*\ -fuse-linker-plugin*\ *) CFLAGS="$CFLAGS -fno-use-linker-plugin" ;; +esac + +dnl Parse the compiler output and extract the necessary +dnl objects, libraries and library flags. +if AC_TRY_EVAL(ac_compile); then + # Parse the compiler output and extract the necessary + # objects, libraries and library flags. + + # Sentinel used to keep track of whether or not we are before + # the conftest object file. + pre_test_object_deps_done=no + + for p in `eval "$output_verbose_link_cmd"`; do + case ${prev}${p} in + + -L* | -R* | -l*) + # Some compilers place space between "-{L,R}" and the path. + # Remove the space. + if test $p = "-L" || + test $p = "-R"; then + prev=$p + continue + fi + + # Expand the sysroot to ease extracting the directories later. + if test -z "$prev"; then + case $p in + -L*) func_stripname_cnf '-L' '' "$p"; prev=-L; p=$func_stripname_result ;; + -R*) func_stripname_cnf '-R' '' "$p"; prev=-R; p=$func_stripname_result ;; + -l*) func_stripname_cnf '-l' '' "$p"; prev=-l; p=$func_stripname_result ;; + esac + fi + case $p in + =*) func_stripname_cnf '=' '' "$p"; p=$lt_sysroot$func_stripname_result ;; + esac + if test "$pre_test_object_deps_done" = no; then + case ${prev} in + -L | -R) + # Internal compiler library paths should come after those + # provided the user. The postdeps already come after the + # user supplied libs so there is no need to process them. + if test -z "$_LT_TAGVAR(compiler_lib_search_path, $1)"; then + _LT_TAGVAR(compiler_lib_search_path, $1)="${prev}${p}" + else + _LT_TAGVAR(compiler_lib_search_path, $1)="${_LT_TAGVAR(compiler_lib_search_path, $1)} ${prev}${p}" + fi + ;; + # The "-l" case would never come before the object being + # linked, so don't bother handling this case. + esac + else + if test -z "$_LT_TAGVAR(postdeps, $1)"; then + _LT_TAGVAR(postdeps, $1)="${prev}${p}" + else + _LT_TAGVAR(postdeps, $1)="${_LT_TAGVAR(postdeps, $1)} ${prev}${p}" + fi + fi + prev= + ;; + + *.lto.$objext) ;; # Ignore GCC LTO objects + *.$objext) + # This assumes that the test object file only shows up + # once in the compiler output. + if test "$p" = "conftest.$objext"; then + pre_test_object_deps_done=yes + continue + fi + + if test "$pre_test_object_deps_done" = no; then + if test -z "$_LT_TAGVAR(predep_objects, $1)"; then + _LT_TAGVAR(predep_objects, $1)="$p" + else + _LT_TAGVAR(predep_objects, $1)="$_LT_TAGVAR(predep_objects, $1) $p" + fi + else + if test -z "$_LT_TAGVAR(postdep_objects, $1)"; then + _LT_TAGVAR(postdep_objects, $1)="$p" + else + _LT_TAGVAR(postdep_objects, $1)="$_LT_TAGVAR(postdep_objects, $1) $p" + fi + fi + ;; + + *) ;; # Ignore the rest. + + esac + done + + # Clean up. + rm -f a.out a.exe +else + echo "libtool.m4: error: problem compiling $1 test program" +fi + +$RM -f confest.$objext +CFLAGS=$_lt_libdeps_save_CFLAGS + +# PORTME: override above test on systems where it is broken +m4_if([$1], [CXX], +[case $host_os in +interix[[3-9]]*) + # Interix 3.5 installs completely hosed .la files for C++, so rather than + # hack all around it, let's just trust "g++" to DTRT. + _LT_TAGVAR(predep_objects,$1)= + _LT_TAGVAR(postdep_objects,$1)= + _LT_TAGVAR(postdeps,$1)= + ;; + +linux*) + case `$CC -V 2>&1 | sed 5q` in + *Sun\ C*) + # Sun C++ 5.9 + + # The more standards-conforming stlport4 library is + # incompatible with the Cstd library. Avoid specifying + # it if it's in CXXFLAGS. Ignore libCrun as + # -library=stlport4 depends on it. + case " $CXX $CXXFLAGS " in + *" -library=stlport4 "*) + solaris_use_stlport4=yes + ;; + esac + + if test "$solaris_use_stlport4" != yes; then + _LT_TAGVAR(postdeps,$1)='-library=Cstd -library=Crun' + fi + ;; + esac + ;; + +solaris*) + case $cc_basename in + CC* | sunCC*) + # The more standards-conforming stlport4 library is + # incompatible with the Cstd library. Avoid specifying + # it if it's in CXXFLAGS. Ignore libCrun as + # -library=stlport4 depends on it. + case " $CXX $CXXFLAGS " in + *" -library=stlport4 "*) + solaris_use_stlport4=yes + ;; + esac + + # Adding this requires a known-good setup of shared libraries for + # Sun compiler versions before 5.6, else PIC objects from an old + # archive will be linked into the output, leading to subtle bugs. + if test "$solaris_use_stlport4" != yes; then + _LT_TAGVAR(postdeps,$1)='-library=Cstd -library=Crun' + fi + ;; + esac + ;; +esac +]) + +case " $_LT_TAGVAR(postdeps, $1) " in +*" -lc "*) _LT_TAGVAR(archive_cmds_need_lc, $1)=no ;; +esac + _LT_TAGVAR(compiler_lib_search_dirs, $1)= +if test -n "${_LT_TAGVAR(compiler_lib_search_path, $1)}"; then + _LT_TAGVAR(compiler_lib_search_dirs, $1)=`echo " ${_LT_TAGVAR(compiler_lib_search_path, $1)}" | ${SED} -e 's! -L! !g' -e 's!^ !!'` +fi +_LT_TAGDECL([], [compiler_lib_search_dirs], [1], + [The directories searched by this compiler when creating a shared library]) +_LT_TAGDECL([], [predep_objects], [1], + [Dependencies to place before and after the objects being linked to + create a shared library]) +_LT_TAGDECL([], [postdep_objects], [1]) +_LT_TAGDECL([], [predeps], [1]) +_LT_TAGDECL([], [postdeps], [1]) +_LT_TAGDECL([], [compiler_lib_search_path], [1], + [The library search path used internally by the compiler when linking + a shared library]) +])# _LT_SYS_HIDDEN_LIBDEPS + + +# _LT_LANG_F77_CONFIG([TAG]) +# -------------------------- +# Ensure that the configuration variables for a Fortran 77 compiler are +# suitably defined. These variables are subsequently used by _LT_CONFIG +# to write the compiler configuration to `libtool'. +m4_defun([_LT_LANG_F77_CONFIG], +[AC_LANG_PUSH(Fortran 77) +if test -z "$F77" || test "X$F77" = "Xno"; then + _lt_disable_F77=yes +fi + +_LT_TAGVAR(archive_cmds_need_lc, $1)=no +_LT_TAGVAR(allow_undefined_flag, $1)= +_LT_TAGVAR(always_export_symbols, $1)=no +_LT_TAGVAR(archive_expsym_cmds, $1)= +_LT_TAGVAR(export_dynamic_flag_spec, $1)= +_LT_TAGVAR(hardcode_direct, $1)=no +_LT_TAGVAR(hardcode_direct_absolute, $1)=no +_LT_TAGVAR(hardcode_libdir_flag_spec, $1)= +_LT_TAGVAR(hardcode_libdir_separator, $1)= +_LT_TAGVAR(hardcode_minus_L, $1)=no +_LT_TAGVAR(hardcode_automatic, $1)=no +_LT_TAGVAR(inherit_rpath, $1)=no +_LT_TAGVAR(module_cmds, $1)= +_LT_TAGVAR(module_expsym_cmds, $1)= +_LT_TAGVAR(link_all_deplibs, $1)=unknown +_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds +_LT_TAGVAR(reload_flag, $1)=$reload_flag +_LT_TAGVAR(reload_cmds, $1)=$reload_cmds +_LT_TAGVAR(no_undefined_flag, $1)= +_LT_TAGVAR(whole_archive_flag_spec, $1)= +_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no + +# Source file extension for f77 test sources. +ac_ext=f + +# Object file extension for compiled f77 test sources. +objext=o +_LT_TAGVAR(objext, $1)=$objext + +# No sense in running all these tests if we already determined that +# the F77 compiler isn't working. Some variables (like enable_shared) +# are currently assumed to apply to all compilers on this platform, +# and will be corrupted by setting them based on a non-working compiler. +if test "$_lt_disable_F77" != yes; then + # Code to be used in simple compile tests + lt_simple_compile_test_code="\ + subroutine t + return + end +" + + # Code to be used in simple link tests + lt_simple_link_test_code="\ + program t + end +" + + # ltmain only uses $CC for tagged configurations so make sure $CC is set. + _LT_TAG_COMPILER + + # save warnings/boilerplate of simple test code + _LT_COMPILER_BOILERPLATE + _LT_LINKER_BOILERPLATE + + # Allow CC to be a program name with arguments. + lt_save_CC="$CC" + lt_save_GCC=$GCC + lt_save_CFLAGS=$CFLAGS + CC=${F77-"f77"} + CFLAGS=$FFLAGS + compiler=$CC + _LT_TAGVAR(compiler, $1)=$CC + _LT_CC_BASENAME([$compiler]) + GCC=$G77 + if test -n "$compiler"; then + AC_MSG_CHECKING([if libtool supports shared libraries]) + AC_MSG_RESULT([$can_build_shared]) + + AC_MSG_CHECKING([whether to build shared libraries]) + test "$can_build_shared" = "no" && enable_shared=no + + # On AIX, shared libraries and static libraries use the same namespace, and + # are all built from PIC. + case $host_os in + aix3*) + test "$enable_shared" = yes && enable_static=no + if test -n "$RANLIB"; then + archive_cmds="$archive_cmds~\$RANLIB \$lib" + postinstall_cmds='$RANLIB $lib' + fi + ;; + aix[[4-9]]*) + if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then + test "$enable_shared" = yes && enable_static=no + fi + ;; + esac + AC_MSG_RESULT([$enable_shared]) + + AC_MSG_CHECKING([whether to build static libraries]) + # Make sure either enable_shared or enable_static is yes. + test "$enable_shared" = yes || enable_static=yes + AC_MSG_RESULT([$enable_static]) + + _LT_TAGVAR(GCC, $1)="$G77" + _LT_TAGVAR(LD, $1)="$LD" + + ## CAVEAT EMPTOR: + ## There is no encapsulation within the following macros, do not change + ## the running order or otherwise move them around unless you know exactly + ## what you are doing... + _LT_COMPILER_PIC($1) + _LT_COMPILER_C_O($1) + _LT_COMPILER_FILE_LOCKS($1) + _LT_LINKER_SHLIBS($1) + _LT_SYS_DYNAMIC_LINKER($1) + _LT_LINKER_HARDCODE_LIBPATH($1) + + _LT_CONFIG($1) + fi # test -n "$compiler" + + GCC=$lt_save_GCC + CC="$lt_save_CC" + CFLAGS="$lt_save_CFLAGS" +fi # test "$_lt_disable_F77" != yes + +AC_LANG_POP +])# _LT_LANG_F77_CONFIG + + +# _LT_LANG_FC_CONFIG([TAG]) +# ------------------------- +# Ensure that the configuration variables for a Fortran compiler are +# suitably defined. These variables are subsequently used by _LT_CONFIG +# to write the compiler configuration to `libtool'. +m4_defun([_LT_LANG_FC_CONFIG], +[AC_LANG_PUSH(Fortran) + +if test -z "$FC" || test "X$FC" = "Xno"; then + _lt_disable_FC=yes +fi + +_LT_TAGVAR(archive_cmds_need_lc, $1)=no +_LT_TAGVAR(allow_undefined_flag, $1)= +_LT_TAGVAR(always_export_symbols, $1)=no +_LT_TAGVAR(archive_expsym_cmds, $1)= +_LT_TAGVAR(export_dynamic_flag_spec, $1)= +_LT_TAGVAR(hardcode_direct, $1)=no +_LT_TAGVAR(hardcode_direct_absolute, $1)=no +_LT_TAGVAR(hardcode_libdir_flag_spec, $1)= +_LT_TAGVAR(hardcode_libdir_separator, $1)= +_LT_TAGVAR(hardcode_minus_L, $1)=no +_LT_TAGVAR(hardcode_automatic, $1)=no +_LT_TAGVAR(inherit_rpath, $1)=no +_LT_TAGVAR(module_cmds, $1)= +_LT_TAGVAR(module_expsym_cmds, $1)= +_LT_TAGVAR(link_all_deplibs, $1)=unknown +_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds +_LT_TAGVAR(reload_flag, $1)=$reload_flag +_LT_TAGVAR(reload_cmds, $1)=$reload_cmds +_LT_TAGVAR(no_undefined_flag, $1)= +_LT_TAGVAR(whole_archive_flag_spec, $1)= +_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no + +# Source file extension for fc test sources. +ac_ext=${ac_fc_srcext-f} + +# Object file extension for compiled fc test sources. +objext=o +_LT_TAGVAR(objext, $1)=$objext + +# No sense in running all these tests if we already determined that +# the FC compiler isn't working. Some variables (like enable_shared) +# are currently assumed to apply to all compilers on this platform, +# and will be corrupted by setting them based on a non-working compiler. +if test "$_lt_disable_FC" != yes; then + # Code to be used in simple compile tests + lt_simple_compile_test_code="\ + subroutine t + return + end +" + + # Code to be used in simple link tests + lt_simple_link_test_code="\ + program t + end +" + + # ltmain only uses $CC for tagged configurations so make sure $CC is set. + _LT_TAG_COMPILER + + # save warnings/boilerplate of simple test code + _LT_COMPILER_BOILERPLATE + _LT_LINKER_BOILERPLATE + + # Allow CC to be a program name with arguments. + lt_save_CC="$CC" + lt_save_GCC=$GCC + lt_save_CFLAGS=$CFLAGS + CC=${FC-"f95"} + CFLAGS=$FCFLAGS + compiler=$CC + GCC=$ac_cv_fc_compiler_gnu + + _LT_TAGVAR(compiler, $1)=$CC + _LT_CC_BASENAME([$compiler]) + + if test -n "$compiler"; then + AC_MSG_CHECKING([if libtool supports shared libraries]) + AC_MSG_RESULT([$can_build_shared]) + + AC_MSG_CHECKING([whether to build shared libraries]) + test "$can_build_shared" = "no" && enable_shared=no + + # On AIX, shared libraries and static libraries use the same namespace, and + # are all built from PIC. + case $host_os in + aix3*) + test "$enable_shared" = yes && enable_static=no + if test -n "$RANLIB"; then + archive_cmds="$archive_cmds~\$RANLIB \$lib" + postinstall_cmds='$RANLIB $lib' + fi + ;; + aix[[4-9]]*) + if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then + test "$enable_shared" = yes && enable_static=no + fi + ;; + esac + AC_MSG_RESULT([$enable_shared]) + + AC_MSG_CHECKING([whether to build static libraries]) + # Make sure either enable_shared or enable_static is yes. + test "$enable_shared" = yes || enable_static=yes + AC_MSG_RESULT([$enable_static]) + + _LT_TAGVAR(GCC, $1)="$ac_cv_fc_compiler_gnu" + _LT_TAGVAR(LD, $1)="$LD" + + ## CAVEAT EMPTOR: + ## There is no encapsulation within the following macros, do not change + ## the running order or otherwise move them around unless you know exactly + ## what you are doing... + _LT_SYS_HIDDEN_LIBDEPS($1) + _LT_COMPILER_PIC($1) + _LT_COMPILER_C_O($1) + _LT_COMPILER_FILE_LOCKS($1) + _LT_LINKER_SHLIBS($1) + _LT_SYS_DYNAMIC_LINKER($1) + _LT_LINKER_HARDCODE_LIBPATH($1) + + _LT_CONFIG($1) + fi # test -n "$compiler" + + GCC=$lt_save_GCC + CC=$lt_save_CC + CFLAGS=$lt_save_CFLAGS +fi # test "$_lt_disable_FC" != yes + +AC_LANG_POP +])# _LT_LANG_FC_CONFIG + + +# _LT_LANG_GCJ_CONFIG([TAG]) +# -------------------------- +# Ensure that the configuration variables for the GNU Java Compiler compiler +# are suitably defined. These variables are subsequently used by _LT_CONFIG +# to write the compiler configuration to `libtool'. +m4_defun([_LT_LANG_GCJ_CONFIG], +[AC_REQUIRE([LT_PROG_GCJ])dnl +AC_LANG_SAVE + +# Source file extension for Java test sources. +ac_ext=java + +# Object file extension for compiled Java test sources. +objext=o +_LT_TAGVAR(objext, $1)=$objext + +# Code to be used in simple compile tests +lt_simple_compile_test_code="class foo {}" + +# Code to be used in simple link tests +lt_simple_link_test_code='public class conftest { public static void main(String[[]] argv) {}; }' + +# ltmain only uses $CC for tagged configurations so make sure $CC is set. +_LT_TAG_COMPILER + +# save warnings/boilerplate of simple test code +_LT_COMPILER_BOILERPLATE +_LT_LINKER_BOILERPLATE + +# Allow CC to be a program name with arguments. +lt_save_CC=$CC +lt_save_CFLAGS=$CFLAGS +lt_save_GCC=$GCC +GCC=yes +CC=${GCJ-"gcj"} +CFLAGS=$GCJFLAGS +compiler=$CC +_LT_TAGVAR(compiler, $1)=$CC +_LT_TAGVAR(LD, $1)="$LD" +_LT_CC_BASENAME([$compiler]) + +# GCJ did not exist at the time GCC didn't implicitly link libc in. +_LT_TAGVAR(archive_cmds_need_lc, $1)=no + +_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds +_LT_TAGVAR(reload_flag, $1)=$reload_flag +_LT_TAGVAR(reload_cmds, $1)=$reload_cmds + +## CAVEAT EMPTOR: +## There is no encapsulation within the following macros, do not change +## the running order or otherwise move them around unless you know exactly +## what you are doing... +if test -n "$compiler"; then + _LT_COMPILER_NO_RTTI($1) + _LT_COMPILER_PIC($1) + _LT_COMPILER_C_O($1) + _LT_COMPILER_FILE_LOCKS($1) + _LT_LINKER_SHLIBS($1) + _LT_LINKER_HARDCODE_LIBPATH($1) + + _LT_CONFIG($1) +fi + +AC_LANG_RESTORE + +GCC=$lt_save_GCC +CC=$lt_save_CC +CFLAGS=$lt_save_CFLAGS +])# _LT_LANG_GCJ_CONFIG + + +# _LT_LANG_GO_CONFIG([TAG]) +# -------------------------- +# Ensure that the configuration variables for the GNU Go compiler +# are suitably defined. These variables are subsequently used by _LT_CONFIG +# to write the compiler configuration to `libtool'. +m4_defun([_LT_LANG_GO_CONFIG], +[AC_REQUIRE([LT_PROG_GO])dnl +AC_LANG_SAVE + +# Source file extension for Go test sources. +ac_ext=go + +# Object file extension for compiled Go test sources. +objext=o +_LT_TAGVAR(objext, $1)=$objext + +# Code to be used in simple compile tests +lt_simple_compile_test_code="package main; func main() { }" + +# Code to be used in simple link tests +lt_simple_link_test_code='package main; func main() { }' + +# ltmain only uses $CC for tagged configurations so make sure $CC is set. +_LT_TAG_COMPILER + +# save warnings/boilerplate of simple test code +_LT_COMPILER_BOILERPLATE +_LT_LINKER_BOILERPLATE + +# Allow CC to be a program name with arguments. +lt_save_CC=$CC +lt_save_CFLAGS=$CFLAGS +lt_save_GCC=$GCC +GCC=yes +CC=${GOC-"gccgo"} +CFLAGS=$GOFLAGS +compiler=$CC +_LT_TAGVAR(compiler, $1)=$CC +_LT_TAGVAR(LD, $1)="$LD" +_LT_CC_BASENAME([$compiler]) + +# Go did not exist at the time GCC didn't implicitly link libc in. +_LT_TAGVAR(archive_cmds_need_lc, $1)=no + +_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds +_LT_TAGVAR(reload_flag, $1)=$reload_flag +_LT_TAGVAR(reload_cmds, $1)=$reload_cmds + +## CAVEAT EMPTOR: +## There is no encapsulation within the following macros, do not change +## the running order or otherwise move them around unless you know exactly +## what you are doing... +if test -n "$compiler"; then + _LT_COMPILER_NO_RTTI($1) + _LT_COMPILER_PIC($1) + _LT_COMPILER_C_O($1) + _LT_COMPILER_FILE_LOCKS($1) + _LT_LINKER_SHLIBS($1) + _LT_LINKER_HARDCODE_LIBPATH($1) + + _LT_CONFIG($1) +fi + +AC_LANG_RESTORE + +GCC=$lt_save_GCC +CC=$lt_save_CC +CFLAGS=$lt_save_CFLAGS +])# _LT_LANG_GO_CONFIG + + +# _LT_LANG_RC_CONFIG([TAG]) +# ------------------------- +# Ensure that the configuration variables for the Windows resource compiler +# are suitably defined. These variables are subsequently used by _LT_CONFIG +# to write the compiler configuration to `libtool'. +m4_defun([_LT_LANG_RC_CONFIG], +[AC_REQUIRE([LT_PROG_RC])dnl +AC_LANG_SAVE + +# Source file extension for RC test sources. +ac_ext=rc + +# Object file extension for compiled RC test sources. +objext=o +_LT_TAGVAR(objext, $1)=$objext + +# Code to be used in simple compile tests +lt_simple_compile_test_code='sample MENU { MENUITEM "&Soup", 100, CHECKED }' + +# Code to be used in simple link tests +lt_simple_link_test_code="$lt_simple_compile_test_code" + +# ltmain only uses $CC for tagged configurations so make sure $CC is set. +_LT_TAG_COMPILER + +# save warnings/boilerplate of simple test code +_LT_COMPILER_BOILERPLATE +_LT_LINKER_BOILERPLATE + +# Allow CC to be a program name with arguments. +lt_save_CC="$CC" +lt_save_CFLAGS=$CFLAGS +lt_save_GCC=$GCC +GCC= +CC=${RC-"windres"} +CFLAGS= +compiler=$CC +_LT_TAGVAR(compiler, $1)=$CC +_LT_CC_BASENAME([$compiler]) +_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=yes + +if test -n "$compiler"; then + : + _LT_CONFIG($1) +fi + +GCC=$lt_save_GCC +AC_LANG_RESTORE +CC=$lt_save_CC +CFLAGS=$lt_save_CFLAGS +])# _LT_LANG_RC_CONFIG + + +# LT_PROG_GCJ +# ----------- +AC_DEFUN([LT_PROG_GCJ], +[m4_ifdef([AC_PROG_GCJ], [AC_PROG_GCJ], + [m4_ifdef([A][M_PROG_GCJ], [A][M_PROG_GCJ], + [AC_CHECK_TOOL(GCJ, gcj,) + test "x${GCJFLAGS+set}" = xset || GCJFLAGS="-g -O2" + AC_SUBST(GCJFLAGS)])])[]dnl +]) + +# Old name: +AU_ALIAS([LT_AC_PROG_GCJ], [LT_PROG_GCJ]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([LT_AC_PROG_GCJ], []) + + +# LT_PROG_GO +# ---------- +AC_DEFUN([LT_PROG_GO], +[AC_CHECK_TOOL(GOC, gccgo,) +]) + + +# LT_PROG_RC +# ---------- +AC_DEFUN([LT_PROG_RC], +[AC_CHECK_TOOL(RC, windres,) +]) + +# Old name: +AU_ALIAS([LT_AC_PROG_RC], [LT_PROG_RC]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([LT_AC_PROG_RC], []) + + +# _LT_DECL_EGREP +# -------------- +# If we don't have a new enough Autoconf to choose the best grep +# available, choose the one first in the user's PATH. +m4_defun([_LT_DECL_EGREP], +[AC_REQUIRE([AC_PROG_EGREP])dnl +AC_REQUIRE([AC_PROG_FGREP])dnl +test -z "$GREP" && GREP=grep +_LT_DECL([], [GREP], [1], [A grep program that handles long lines]) +_LT_DECL([], [EGREP], [1], [An ERE matcher]) +_LT_DECL([], [FGREP], [1], [A literal string matcher]) +dnl Non-bleeding-edge autoconf doesn't subst GREP, so do it here too +AC_SUBST([GREP]) +]) + + +# _LT_DECL_OBJDUMP +# -------------- +# If we don't have a new enough Autoconf to choose the best objdump +# available, choose the one first in the user's PATH. +m4_defun([_LT_DECL_OBJDUMP], +[AC_CHECK_TOOL(OBJDUMP, objdump, false) +test -z "$OBJDUMP" && OBJDUMP=objdump +_LT_DECL([], [OBJDUMP], [1], [An object symbol dumper]) +AC_SUBST([OBJDUMP]) +]) + +# _LT_DECL_DLLTOOL +# ---------------- +# Ensure DLLTOOL variable is set. +m4_defun([_LT_DECL_DLLTOOL], +[AC_CHECK_TOOL(DLLTOOL, dlltool, false) +test -z "$DLLTOOL" && DLLTOOL=dlltool +_LT_DECL([], [DLLTOOL], [1], [DLL creation program]) +AC_SUBST([DLLTOOL]) +]) + +# _LT_DECL_SED +# ------------ +# Check for a fully-functional sed program, that truncates +# as few characters as possible. Prefer GNU sed if found. +m4_defun([_LT_DECL_SED], +[AC_PROG_SED +test -z "$SED" && SED=sed +Xsed="$SED -e 1s/^X//" +_LT_DECL([], [SED], [1], [A sed program that does not truncate output]) +_LT_DECL([], [Xsed], ["\$SED -e 1s/^X//"], + [Sed that helps us avoid accidentally triggering echo(1) options like -n]) +])# _LT_DECL_SED + +m4_ifndef([AC_PROG_SED], [ +############################################################ +# NOTE: This macro has been submitted for inclusion into # +# GNU Autoconf as AC_PROG_SED. When it is available in # +# a released version of Autoconf we should remove this # +# macro and use it instead. # +############################################################ + +m4_defun([AC_PROG_SED], +[AC_MSG_CHECKING([for a sed that does not truncate output]) +AC_CACHE_VAL(lt_cv_path_SED, +[# Loop through the user's path and test for sed and gsed. +# Then use that list of sed's as ones to test for truncation. +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for lt_ac_prog in sed gsed; do + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$lt_ac_prog$ac_exec_ext"; then + lt_ac_sed_list="$lt_ac_sed_list $as_dir/$lt_ac_prog$ac_exec_ext" + fi + done + done +done +IFS=$as_save_IFS +lt_ac_max=0 +lt_ac_count=0 +# Add /usr/xpg4/bin/sed as it is typically found on Solaris +# along with /bin/sed that truncates output. +for lt_ac_sed in $lt_ac_sed_list /usr/xpg4/bin/sed; do + test ! -f $lt_ac_sed && continue + cat /dev/null > conftest.in + lt_ac_count=0 + echo $ECHO_N "0123456789$ECHO_C" >conftest.in + # Check for GNU sed and select it if it is found. + if "$lt_ac_sed" --version 2>&1 < /dev/null | grep 'GNU' > /dev/null; then + lt_cv_path_SED=$lt_ac_sed + break + fi + while true; do + cat conftest.in conftest.in >conftest.tmp + mv conftest.tmp conftest.in + cp conftest.in conftest.nl + echo >>conftest.nl + $lt_ac_sed -e 's/a$//' < conftest.nl >conftest.out || break + cmp -s conftest.out conftest.nl || break + # 10000 chars as input seems more than enough + test $lt_ac_count -gt 10 && break + lt_ac_count=`expr $lt_ac_count + 1` + if test $lt_ac_count -gt $lt_ac_max; then + lt_ac_max=$lt_ac_count + lt_cv_path_SED=$lt_ac_sed + fi + done +done +]) +SED=$lt_cv_path_SED +AC_SUBST([SED]) +AC_MSG_RESULT([$SED]) +])#AC_PROG_SED +])#m4_ifndef + +# Old name: +AU_ALIAS([LT_AC_PROG_SED], [AC_PROG_SED]) +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([LT_AC_PROG_SED], []) + + +# _LT_CHECK_SHELL_FEATURES +# ------------------------ +# Find out whether the shell is Bourne or XSI compatible, +# or has some other useful features. +m4_defun([_LT_CHECK_SHELL_FEATURES], +[AC_MSG_CHECKING([whether the shell understands some XSI constructs]) +# Try some XSI features +xsi_shell=no +( _lt_dummy="a/b/c" + test "${_lt_dummy##*/},${_lt_dummy%/*},${_lt_dummy#??}"${_lt_dummy%"$_lt_dummy"}, \ + = c,a/b,b/c, \ + && eval 'test $(( 1 + 1 )) -eq 2 \ + && test "${#_lt_dummy}" -eq 5' ) >/dev/null 2>&1 \ + && xsi_shell=yes +AC_MSG_RESULT([$xsi_shell]) +_LT_CONFIG_LIBTOOL_INIT([xsi_shell='$xsi_shell']) + +AC_MSG_CHECKING([whether the shell understands "+="]) +lt_shell_append=no +( foo=bar; set foo baz; eval "$[1]+=\$[2]" && test "$foo" = barbaz ) \ + >/dev/null 2>&1 \ + && lt_shell_append=yes +AC_MSG_RESULT([$lt_shell_append]) +_LT_CONFIG_LIBTOOL_INIT([lt_shell_append='$lt_shell_append']) + +if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then + lt_unset=unset +else + lt_unset=false +fi +_LT_DECL([], [lt_unset], [0], [whether the shell understands "unset"])dnl + +# test EBCDIC or ASCII +case `echo X|tr X '\101'` in + A) # ASCII based system + # \n is not interpreted correctly by Solaris 8 /usr/ucb/tr + lt_SP2NL='tr \040 \012' + lt_NL2SP='tr \015\012 \040\040' + ;; + *) # EBCDIC based system + lt_SP2NL='tr \100 \n' + lt_NL2SP='tr \r\n \100\100' + ;; +esac +_LT_DECL([SP2NL], [lt_SP2NL], [1], [turn spaces into newlines])dnl +_LT_DECL([NL2SP], [lt_NL2SP], [1], [turn newlines into spaces])dnl +])# _LT_CHECK_SHELL_FEATURES + + +# _LT_PROG_FUNCTION_REPLACE (FUNCNAME, REPLACEMENT-BODY) +# ------------------------------------------------------ +# In `$cfgfile', look for function FUNCNAME delimited by `^FUNCNAME ()$' and +# '^} FUNCNAME ', and replace its body with REPLACEMENT-BODY. +m4_defun([_LT_PROG_FUNCTION_REPLACE], +[dnl { +sed -e '/^$1 ()$/,/^} # $1 /c\ +$1 ()\ +{\ +m4_bpatsubsts([$2], [$], [\\], [^\([ ]\)], [\\\1]) +} # Extended-shell $1 implementation' "$cfgfile" > $cfgfile.tmp \ + && mv -f "$cfgfile.tmp" "$cfgfile" \ + || (rm -f "$cfgfile" && cp "$cfgfile.tmp" "$cfgfile" && rm -f "$cfgfile.tmp") +test 0 -eq $? || _lt_function_replace_fail=: +]) + + +# _LT_PROG_REPLACE_SHELLFNS +# ------------------------- +# Replace existing portable implementations of several shell functions with +# equivalent extended shell implementations where those features are available.. +m4_defun([_LT_PROG_REPLACE_SHELLFNS], +[if test x"$xsi_shell" = xyes; then + _LT_PROG_FUNCTION_REPLACE([func_dirname], [dnl + case ${1} in + */*) func_dirname_result="${1%/*}${2}" ;; + * ) func_dirname_result="${3}" ;; + esac]) + + _LT_PROG_FUNCTION_REPLACE([func_basename], [dnl + func_basename_result="${1##*/}"]) + + _LT_PROG_FUNCTION_REPLACE([func_dirname_and_basename], [dnl + case ${1} in + */*) func_dirname_result="${1%/*}${2}" ;; + * ) func_dirname_result="${3}" ;; + esac + func_basename_result="${1##*/}"]) + + _LT_PROG_FUNCTION_REPLACE([func_stripname], [dnl + # pdksh 5.2.14 does not do ${X%$Y} correctly if both X and Y are + # positional parameters, so assign one to ordinary parameter first. + func_stripname_result=${3} + func_stripname_result=${func_stripname_result#"${1}"} + func_stripname_result=${func_stripname_result%"${2}"}]) + + _LT_PROG_FUNCTION_REPLACE([func_split_long_opt], [dnl + func_split_long_opt_name=${1%%=*} + func_split_long_opt_arg=${1#*=}]) + + _LT_PROG_FUNCTION_REPLACE([func_split_short_opt], [dnl + func_split_short_opt_arg=${1#??} + func_split_short_opt_name=${1%"$func_split_short_opt_arg"}]) + + _LT_PROG_FUNCTION_REPLACE([func_lo2o], [dnl + case ${1} in + *.lo) func_lo2o_result=${1%.lo}.${objext} ;; + *) func_lo2o_result=${1} ;; + esac]) + + _LT_PROG_FUNCTION_REPLACE([func_xform], [ func_xform_result=${1%.*}.lo]) + + _LT_PROG_FUNCTION_REPLACE([func_arith], [ func_arith_result=$(( $[*] ))]) + + _LT_PROG_FUNCTION_REPLACE([func_len], [ func_len_result=${#1}]) +fi + +if test x"$lt_shell_append" = xyes; then + _LT_PROG_FUNCTION_REPLACE([func_append], [ eval "${1}+=\\${2}"]) + + _LT_PROG_FUNCTION_REPLACE([func_append_quoted], [dnl + func_quote_for_eval "${2}" +dnl m4 expansion turns \\\\ into \\, and then the shell eval turns that into \ + eval "${1}+=\\\\ \\$func_quote_for_eval_result"]) + + # Save a `func_append' function call where possible by direct use of '+=' + sed -e 's%func_append \([[a-zA-Z_]]\{1,\}\) "%\1+="%g' $cfgfile > $cfgfile.tmp \ + && mv -f "$cfgfile.tmp" "$cfgfile" \ + || (rm -f "$cfgfile" && cp "$cfgfile.tmp" "$cfgfile" && rm -f "$cfgfile.tmp") + test 0 -eq $? || _lt_function_replace_fail=: +else + # Save a `func_append' function call even when '+=' is not available + sed -e 's%func_append \([[a-zA-Z_]]\{1,\}\) "%\1="$\1%g' $cfgfile > $cfgfile.tmp \ + && mv -f "$cfgfile.tmp" "$cfgfile" \ + || (rm -f "$cfgfile" && cp "$cfgfile.tmp" "$cfgfile" && rm -f "$cfgfile.tmp") + test 0 -eq $? || _lt_function_replace_fail=: +fi + +if test x"$_lt_function_replace_fail" = x":"; then + AC_MSG_WARN([Unable to substitute extended shell functions in $ofile]) +fi +]) + +# _LT_PATH_CONVERSION_FUNCTIONS +# ----------------------------- +# Determine which file name conversion functions should be used by +# func_to_host_file (and, implicitly, by func_to_host_path). These are needed +# for certain cross-compile configurations and native mingw. +m4_defun([_LT_PATH_CONVERSION_FUNCTIONS], +[AC_REQUIRE([AC_CANONICAL_HOST])dnl +AC_REQUIRE([AC_CANONICAL_BUILD])dnl +AC_MSG_CHECKING([how to convert $build file names to $host format]) +AC_CACHE_VAL(lt_cv_to_host_file_cmd, +[case $host in + *-*-mingw* ) + case $build in + *-*-mingw* ) # actually msys + lt_cv_to_host_file_cmd=func_convert_file_msys_to_w32 + ;; + *-*-cygwin* ) + lt_cv_to_host_file_cmd=func_convert_file_cygwin_to_w32 + ;; + * ) # otherwise, assume *nix + lt_cv_to_host_file_cmd=func_convert_file_nix_to_w32 + ;; + esac + ;; + *-*-cygwin* ) + case $build in + *-*-mingw* ) # actually msys + lt_cv_to_host_file_cmd=func_convert_file_msys_to_cygwin + ;; + *-*-cygwin* ) + lt_cv_to_host_file_cmd=func_convert_file_noop + ;; + * ) # otherwise, assume *nix + lt_cv_to_host_file_cmd=func_convert_file_nix_to_cygwin + ;; + esac + ;; + * ) # unhandled hosts (and "normal" native builds) + lt_cv_to_host_file_cmd=func_convert_file_noop + ;; +esac +]) +to_host_file_cmd=$lt_cv_to_host_file_cmd +AC_MSG_RESULT([$lt_cv_to_host_file_cmd]) +_LT_DECL([to_host_file_cmd], [lt_cv_to_host_file_cmd], + [0], [convert $build file names to $host format])dnl + +AC_MSG_CHECKING([how to convert $build file names to toolchain format]) +AC_CACHE_VAL(lt_cv_to_tool_file_cmd, +[#assume ordinary cross tools, or native build. +lt_cv_to_tool_file_cmd=func_convert_file_noop +case $host in + *-*-mingw* ) + case $build in + *-*-mingw* ) # actually msys + lt_cv_to_tool_file_cmd=func_convert_file_msys_to_w32 + ;; + esac + ;; +esac +]) +to_tool_file_cmd=$lt_cv_to_tool_file_cmd +AC_MSG_RESULT([$lt_cv_to_tool_file_cmd]) +_LT_DECL([to_tool_file_cmd], [lt_cv_to_tool_file_cmd], + [0], [convert $build files to toolchain format])dnl +])# _LT_PATH_CONVERSION_FUNCTIONS diff -ru4NwbB libpng-1.5.10/scripts/ltoptions.m4 libpng-1.6.0beta22/scripts/ltoptions.m4 --- libpng-1.5.10/scripts/ltoptions.m4 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/scripts/ltoptions.m4 2012-01-26 23:08:09.000000000 -0600 @@ -0,0 +1,384 @@ +# Helper functions for option handling. -*- Autoconf -*- +# +# Copyright (C) 2004, 2005, 2007, 2008, 2009 Free Software Foundation, +# Inc. +# Written by Gary V. Vaughan, 2004 +# +# This file is free software; the Free Software Foundation gives +# unlimited permission to copy and/or distribute it, with or without +# modifications, as long as this notice is preserved. + +# serial 7 ltoptions.m4 + +# This is to help aclocal find these macros, as it can't see m4_define. +AC_DEFUN([LTOPTIONS_VERSION], [m4_if([1])]) + + +# _LT_MANGLE_OPTION(MACRO-NAME, OPTION-NAME) +# ------------------------------------------ +m4_define([_LT_MANGLE_OPTION], +[[_LT_OPTION_]m4_bpatsubst($1__$2, [[^a-zA-Z0-9_]], [_])]) + + +# _LT_SET_OPTION(MACRO-NAME, OPTION-NAME) +# --------------------------------------- +# Set option OPTION-NAME for macro MACRO-NAME, and if there is a +# matching handler defined, dispatch to it. Other OPTION-NAMEs are +# saved as a flag. +m4_define([_LT_SET_OPTION], +[m4_define(_LT_MANGLE_OPTION([$1], [$2]))dnl +m4_ifdef(_LT_MANGLE_DEFUN([$1], [$2]), + _LT_MANGLE_DEFUN([$1], [$2]), + [m4_warning([Unknown $1 option `$2'])])[]dnl +]) + + +# _LT_IF_OPTION(MACRO-NAME, OPTION-NAME, IF-SET, [IF-NOT-SET]) +# ------------------------------------------------------------ +# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise. +m4_define([_LT_IF_OPTION], +[m4_ifdef(_LT_MANGLE_OPTION([$1], [$2]), [$3], [$4])]) + + +# _LT_UNLESS_OPTIONS(MACRO-NAME, OPTION-LIST, IF-NOT-SET) +# ------------------------------------------------------- +# Execute IF-NOT-SET unless all options in OPTION-LIST for MACRO-NAME +# are set. +m4_define([_LT_UNLESS_OPTIONS], +[m4_foreach([_LT_Option], m4_split(m4_normalize([$2])), + [m4_ifdef(_LT_MANGLE_OPTION([$1], _LT_Option), + [m4_define([$0_found])])])[]dnl +m4_ifdef([$0_found], [m4_undefine([$0_found])], [$3 +])[]dnl +]) + + +# _LT_SET_OPTIONS(MACRO-NAME, OPTION-LIST) +# ---------------------------------------- +# OPTION-LIST is a space-separated list of Libtool options associated +# with MACRO-NAME. If any OPTION has a matching handler declared with +# LT_OPTION_DEFINE, dispatch to that macro; otherwise complain about +# the unknown option and exit. +m4_defun([_LT_SET_OPTIONS], +[# Set options +m4_foreach([_LT_Option], m4_split(m4_normalize([$2])), + [_LT_SET_OPTION([$1], _LT_Option)]) + +m4_if([$1],[LT_INIT],[ + dnl + dnl Simply set some default values (i.e off) if boolean options were not + dnl specified: + _LT_UNLESS_OPTIONS([LT_INIT], [dlopen], [enable_dlopen=no + ]) + _LT_UNLESS_OPTIONS([LT_INIT], [win32-dll], [enable_win32_dll=no + ]) + dnl + dnl If no reference was made to various pairs of opposing options, then + dnl we run the default mode handler for the pair. For example, if neither + dnl `shared' nor `disable-shared' was passed, we enable building of shared + dnl archives by default: + _LT_UNLESS_OPTIONS([LT_INIT], [shared disable-shared], [_LT_ENABLE_SHARED]) + _LT_UNLESS_OPTIONS([LT_INIT], [static disable-static], [_LT_ENABLE_STATIC]) + _LT_UNLESS_OPTIONS([LT_INIT], [pic-only no-pic], [_LT_WITH_PIC]) + _LT_UNLESS_OPTIONS([LT_INIT], [fast-install disable-fast-install], + [_LT_ENABLE_FAST_INSTALL]) + ]) +])# _LT_SET_OPTIONS + + +## --------------------------------- ## +## Macros to handle LT_INIT options. ## +## --------------------------------- ## + +# _LT_MANGLE_DEFUN(MACRO-NAME, OPTION-NAME) +# ----------------------------------------- +m4_define([_LT_MANGLE_DEFUN], +[[_LT_OPTION_DEFUN_]m4_bpatsubst(m4_toupper([$1__$2]), [[^A-Z0-9_]], [_])]) + + +# LT_OPTION_DEFINE(MACRO-NAME, OPTION-NAME, CODE) +# ----------------------------------------------- +m4_define([LT_OPTION_DEFINE], +[m4_define(_LT_MANGLE_DEFUN([$1], [$2]), [$3])[]dnl +])# LT_OPTION_DEFINE + + +# dlopen +# ------ +LT_OPTION_DEFINE([LT_INIT], [dlopen], [enable_dlopen=yes +]) + +AU_DEFUN([AC_LIBTOOL_DLOPEN], +[_LT_SET_OPTION([LT_INIT], [dlopen]) +AC_DIAGNOSE([obsolete], +[$0: Remove this warning and the call to _LT_SET_OPTION when you +put the `dlopen' option into LT_INIT's first parameter.]) +]) + +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_LIBTOOL_DLOPEN], []) + + +# win32-dll +# --------- +# Declare package support for building win32 dll's. +LT_OPTION_DEFINE([LT_INIT], [win32-dll], +[enable_win32_dll=yes + +case $host in +*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-cegcc*) + AC_CHECK_TOOL(AS, as, false) + AC_CHECK_TOOL(DLLTOOL, dlltool, false) + AC_CHECK_TOOL(OBJDUMP, objdump, false) + ;; +esac + +test -z "$AS" && AS=as +_LT_DECL([], [AS], [1], [Assembler program])dnl + +test -z "$DLLTOOL" && DLLTOOL=dlltool +_LT_DECL([], [DLLTOOL], [1], [DLL creation program])dnl + +test -z "$OBJDUMP" && OBJDUMP=objdump +_LT_DECL([], [OBJDUMP], [1], [Object dumper program])dnl +])# win32-dll + +AU_DEFUN([AC_LIBTOOL_WIN32_DLL], +[AC_REQUIRE([AC_CANONICAL_HOST])dnl +_LT_SET_OPTION([LT_INIT], [win32-dll]) +AC_DIAGNOSE([obsolete], +[$0: Remove this warning and the call to _LT_SET_OPTION when you +put the `win32-dll' option into LT_INIT's first parameter.]) +]) + +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_LIBTOOL_WIN32_DLL], []) + + +# _LT_ENABLE_SHARED([DEFAULT]) +# ---------------------------- +# implement the --enable-shared flag, and supports the `shared' and +# `disable-shared' LT_INIT options. +# DEFAULT is either `yes' or `no'. If omitted, it defaults to `yes'. +m4_define([_LT_ENABLE_SHARED], +[m4_define([_LT_ENABLE_SHARED_DEFAULT], [m4_if($1, no, no, yes)])dnl +AC_ARG_ENABLE([shared], + [AS_HELP_STRING([--enable-shared@<:@=PKGS@:>@], + [build shared libraries @<:@default=]_LT_ENABLE_SHARED_DEFAULT[@:>@])], + [p=${PACKAGE-default} + case $enableval in + yes) enable_shared=yes ;; + no) enable_shared=no ;; + *) + enable_shared=no + # Look at the argument we got. We use all the common list separators. + lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," + for pkg in $enableval; do + IFS="$lt_save_ifs" + if test "X$pkg" = "X$p"; then + enable_shared=yes + fi + done + IFS="$lt_save_ifs" + ;; + esac], + [enable_shared=]_LT_ENABLE_SHARED_DEFAULT) + + _LT_DECL([build_libtool_libs], [enable_shared], [0], + [Whether or not to build shared libraries]) +])# _LT_ENABLE_SHARED + +LT_OPTION_DEFINE([LT_INIT], [shared], [_LT_ENABLE_SHARED([yes])]) +LT_OPTION_DEFINE([LT_INIT], [disable-shared], [_LT_ENABLE_SHARED([no])]) + +# Old names: +AC_DEFUN([AC_ENABLE_SHARED], +[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[shared]) +]) + +AC_DEFUN([AC_DISABLE_SHARED], +[_LT_SET_OPTION([LT_INIT], [disable-shared]) +]) + +AU_DEFUN([AM_ENABLE_SHARED], [AC_ENABLE_SHARED($@)]) +AU_DEFUN([AM_DISABLE_SHARED], [AC_DISABLE_SHARED($@)]) + +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AM_ENABLE_SHARED], []) +dnl AC_DEFUN([AM_DISABLE_SHARED], []) + + + +# _LT_ENABLE_STATIC([DEFAULT]) +# ---------------------------- +# implement the --enable-static flag, and support the `static' and +# `disable-static' LT_INIT options. +# DEFAULT is either `yes' or `no'. If omitted, it defaults to `yes'. +m4_define([_LT_ENABLE_STATIC], +[m4_define([_LT_ENABLE_STATIC_DEFAULT], [m4_if($1, no, no, yes)])dnl +AC_ARG_ENABLE([static], + [AS_HELP_STRING([--enable-static@<:@=PKGS@:>@], + [build static libraries @<:@default=]_LT_ENABLE_STATIC_DEFAULT[@:>@])], + [p=${PACKAGE-default} + case $enableval in + yes) enable_static=yes ;; + no) enable_static=no ;; + *) + enable_static=no + # Look at the argument we got. We use all the common list separators. + lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," + for pkg in $enableval; do + IFS="$lt_save_ifs" + if test "X$pkg" = "X$p"; then + enable_static=yes + fi + done + IFS="$lt_save_ifs" + ;; + esac], + [enable_static=]_LT_ENABLE_STATIC_DEFAULT) + + _LT_DECL([build_old_libs], [enable_static], [0], + [Whether or not to build static libraries]) +])# _LT_ENABLE_STATIC + +LT_OPTION_DEFINE([LT_INIT], [static], [_LT_ENABLE_STATIC([yes])]) +LT_OPTION_DEFINE([LT_INIT], [disable-static], [_LT_ENABLE_STATIC([no])]) + +# Old names: +AC_DEFUN([AC_ENABLE_STATIC], +[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[static]) +]) + +AC_DEFUN([AC_DISABLE_STATIC], +[_LT_SET_OPTION([LT_INIT], [disable-static]) +]) + +AU_DEFUN([AM_ENABLE_STATIC], [AC_ENABLE_STATIC($@)]) +AU_DEFUN([AM_DISABLE_STATIC], [AC_DISABLE_STATIC($@)]) + +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AM_ENABLE_STATIC], []) +dnl AC_DEFUN([AM_DISABLE_STATIC], []) + + + +# _LT_ENABLE_FAST_INSTALL([DEFAULT]) +# ---------------------------------- +# implement the --enable-fast-install flag, and support the `fast-install' +# and `disable-fast-install' LT_INIT options. +# DEFAULT is either `yes' or `no'. If omitted, it defaults to `yes'. +m4_define([_LT_ENABLE_FAST_INSTALL], +[m4_define([_LT_ENABLE_FAST_INSTALL_DEFAULT], [m4_if($1, no, no, yes)])dnl +AC_ARG_ENABLE([fast-install], + [AS_HELP_STRING([--enable-fast-install@<:@=PKGS@:>@], + [optimize for fast installation @<:@default=]_LT_ENABLE_FAST_INSTALL_DEFAULT[@:>@])], + [p=${PACKAGE-default} + case $enableval in + yes) enable_fast_install=yes ;; + no) enable_fast_install=no ;; + *) + enable_fast_install=no + # Look at the argument we got. We use all the common list separators. + lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," + for pkg in $enableval; do + IFS="$lt_save_ifs" + if test "X$pkg" = "X$p"; then + enable_fast_install=yes + fi + done + IFS="$lt_save_ifs" + ;; + esac], + [enable_fast_install=]_LT_ENABLE_FAST_INSTALL_DEFAULT) + +_LT_DECL([fast_install], [enable_fast_install], [0], + [Whether or not to optimize for fast installation])dnl +])# _LT_ENABLE_FAST_INSTALL + +LT_OPTION_DEFINE([LT_INIT], [fast-install], [_LT_ENABLE_FAST_INSTALL([yes])]) +LT_OPTION_DEFINE([LT_INIT], [disable-fast-install], [_LT_ENABLE_FAST_INSTALL([no])]) + +# Old names: +AU_DEFUN([AC_ENABLE_FAST_INSTALL], +[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[fast-install]) +AC_DIAGNOSE([obsolete], +[$0: Remove this warning and the call to _LT_SET_OPTION when you put +the `fast-install' option into LT_INIT's first parameter.]) +]) + +AU_DEFUN([AC_DISABLE_FAST_INSTALL], +[_LT_SET_OPTION([LT_INIT], [disable-fast-install]) +AC_DIAGNOSE([obsolete], +[$0: Remove this warning and the call to _LT_SET_OPTION when you put +the `disable-fast-install' option into LT_INIT's first parameter.]) +]) + +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_ENABLE_FAST_INSTALL], []) +dnl AC_DEFUN([AM_DISABLE_FAST_INSTALL], []) + + +# _LT_WITH_PIC([MODE]) +# -------------------- +# implement the --with-pic flag, and support the `pic-only' and `no-pic' +# LT_INIT options. +# MODE is either `yes' or `no'. If omitted, it defaults to `both'. +m4_define([_LT_WITH_PIC], +[AC_ARG_WITH([pic], + [AS_HELP_STRING([--with-pic@<:@=PKGS@:>@], + [try to use only PIC/non-PIC objects @<:@default=use both@:>@])], + [lt_p=${PACKAGE-default} + case $withval in + yes|no) pic_mode=$withval ;; + *) + pic_mode=default + # Look at the argument we got. We use all the common list separators. + lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," + for lt_pkg in $withval; do + IFS="$lt_save_ifs" + if test "X$lt_pkg" = "X$lt_p"; then + pic_mode=yes + fi + done + IFS="$lt_save_ifs" + ;; + esac], + [pic_mode=default]) + +test -z "$pic_mode" && pic_mode=m4_default([$1], [default]) + +_LT_DECL([], [pic_mode], [0], [What type of objects to build])dnl +])# _LT_WITH_PIC + +LT_OPTION_DEFINE([LT_INIT], [pic-only], [_LT_WITH_PIC([yes])]) +LT_OPTION_DEFINE([LT_INIT], [no-pic], [_LT_WITH_PIC([no])]) + +# Old name: +AU_DEFUN([AC_LIBTOOL_PICMODE], +[_LT_SET_OPTION([LT_INIT], [pic-only]) +AC_DIAGNOSE([obsolete], +[$0: Remove this warning and the call to _LT_SET_OPTION when you +put the `pic-only' option into LT_INIT's first parameter.]) +]) + +dnl aclocal-1.4 backwards compatibility: +dnl AC_DEFUN([AC_LIBTOOL_PICMODE], []) + +## ----------------- ## +## LTDL_INIT Options ## +## ----------------- ## + +m4_define([_LTDL_MODE], []) +LT_OPTION_DEFINE([LTDL_INIT], [nonrecursive], + [m4_define([_LTDL_MODE], [nonrecursive])]) +LT_OPTION_DEFINE([LTDL_INIT], [recursive], + [m4_define([_LTDL_MODE], [recursive])]) +LT_OPTION_DEFINE([LTDL_INIT], [subproject], + [m4_define([_LTDL_MODE], [subproject])]) + +m4_define([_LTDL_TYPE], []) +LT_OPTION_DEFINE([LTDL_INIT], [installable], + [m4_define([_LTDL_TYPE], [installable])]) +LT_OPTION_DEFINE([LTDL_INIT], [convenience], + [m4_define([_LTDL_TYPE], [convenience])]) diff -ru4NwbB libpng-1.5.10/scripts/ltsugar.m4 libpng-1.6.0beta22/scripts/ltsugar.m4 --- libpng-1.5.10/scripts/ltsugar.m4 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/scripts/ltsugar.m4 2012-01-26 23:08:09.000000000 -0600 @@ -0,0 +1,123 @@ +# ltsugar.m4 -- libtool m4 base layer. -*-Autoconf-*- +# +# Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc. +# Written by Gary V. Vaughan, 2004 +# +# This file is free software; the Free Software Foundation gives +# unlimited permission to copy and/or distribute it, with or without +# modifications, as long as this notice is preserved. + +# serial 6 ltsugar.m4 + +# This is to help aclocal find these macros, as it can't see m4_define. +AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])]) + + +# lt_join(SEP, ARG1, [ARG2...]) +# ----------------------------- +# Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their +# associated separator. +# Needed until we can rely on m4_join from Autoconf 2.62, since all earlier +# versions in m4sugar had bugs. +m4_define([lt_join], +[m4_if([$#], [1], [], + [$#], [2], [[$2]], + [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])]) +m4_define([_lt_join], +[m4_if([$#$2], [2], [], + [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])]) + + +# lt_car(LIST) +# lt_cdr(LIST) +# ------------ +# Manipulate m4 lists. +# These macros are necessary as long as will still need to support +# Autoconf-2.59 which quotes differently. +m4_define([lt_car], [[$1]]) +m4_define([lt_cdr], +[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])], + [$#], 1, [], + [m4_dquote(m4_shift($@))])]) +m4_define([lt_unquote], $1) + + +# lt_append(MACRO-NAME, STRING, [SEPARATOR]) +# ------------------------------------------ +# Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'. +# Note that neither SEPARATOR nor STRING are expanded; they are appended +# to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked). +# No SEPARATOR is output if MACRO-NAME was previously undefined (different +# than defined and empty). +# +# This macro is needed until we can rely on Autoconf 2.62, since earlier +# versions of m4sugar mistakenly expanded SEPARATOR but not STRING. +m4_define([lt_append], +[m4_define([$1], + m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])]) + + + +# lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...]) +# ---------------------------------------------------------- +# Produce a SEP delimited list of all paired combinations of elements of +# PREFIX-LIST with SUFFIX1 through SUFFIXn. Each element of the list +# has the form PREFIXmINFIXSUFFIXn. +# Needed until we can rely on m4_combine added in Autoconf 2.62. +m4_define([lt_combine], +[m4_if(m4_eval([$# > 3]), [1], + [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl +[[m4_foreach([_Lt_prefix], [$2], + [m4_foreach([_Lt_suffix], + ]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[, + [_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])]) + + +# lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ]) +# ----------------------------------------------------------------------- +# Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited +# by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ. +m4_define([lt_if_append_uniq], +[m4_ifdef([$1], + [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1], + [lt_append([$1], [$2], [$3])$4], + [$5])], + [lt_append([$1], [$2], [$3])$4])]) + + +# lt_dict_add(DICT, KEY, VALUE) +# ----------------------------- +m4_define([lt_dict_add], +[m4_define([$1($2)], [$3])]) + + +# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE) +# -------------------------------------------- +m4_define([lt_dict_add_subkey], +[m4_define([$1($2:$3)], [$4])]) + + +# lt_dict_fetch(DICT, KEY, [SUBKEY]) +# ---------------------------------- +m4_define([lt_dict_fetch], +[m4_ifval([$3], + m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]), + m4_ifdef([$1($2)], [m4_defn([$1($2)])]))]) + + +# lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE]) +# ----------------------------------------------------------------- +m4_define([lt_if_dict_fetch], +[m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4], + [$5], + [$6])]) + + +# lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...]) +# -------------------------------------------------------------- +m4_define([lt_dict_filter], +[m4_if([$5], [], [], + [lt_join(m4_quote(m4_default([$4], [[, ]])), + lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]), + [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl +]) diff -ru4NwbB libpng-1.5.10/scripts/ltversion.m4 libpng-1.6.0beta22/scripts/ltversion.m4 --- libpng-1.5.10/scripts/ltversion.m4 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/scripts/ltversion.m4 2012-01-26 23:08:10.000000000 -0600 @@ -0,0 +1,23 @@ +# ltversion.m4 -- version numbers -*- Autoconf -*- +# +# Copyright (C) 2004 Free Software Foundation, Inc. +# Written by Scott James Remnant, 2004 +# +# This file is free software; the Free Software Foundation gives +# unlimited permission to copy and/or distribute it, with or without +# modifications, as long as this notice is preserved. + +# @configure_input@ + +# serial 3337 ltversion.m4 +# This file is part of GNU Libtool + +m4_define([LT_PACKAGE_VERSION], [2.4.2]) +m4_define([LT_PACKAGE_REVISION], [1.3337]) + +AC_DEFUN([LTVERSION_VERSION], +[macro_version='2.4.2' +macro_revision='1.3337' +_LT_DECL(, macro_version, 0, [Which release of libtool.m4 was used?]) +_LT_DECL(, macro_revision, 0) +]) diff -ru4NwbB libpng-1.5.10/scripts/lt~obsolete.m4 libpng-1.6.0beta22/scripts/lt~obsolete.m4 --- libpng-1.5.10/scripts/lt~obsolete.m4 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/scripts/lt~obsolete.m4 2012-01-26 23:08:10.000000000 -0600 @@ -0,0 +1,98 @@ +# lt~obsolete.m4 -- aclocal satisfying obsolete definitions. -*-Autoconf-*- +# +# Copyright (C) 2004, 2005, 2007, 2009 Free Software Foundation, Inc. +# Written by Scott James Remnant, 2004. +# +# This file is free software; the Free Software Foundation gives +# unlimited permission to copy and/or distribute it, with or without +# modifications, as long as this notice is preserved. + +# serial 5 lt~obsolete.m4 + +# These exist entirely to fool aclocal when bootstrapping libtool. +# +# In the past libtool.m4 has provided macros via AC_DEFUN (or AU_DEFUN) +# which have later been changed to m4_define as they aren't part of the +# exported API, or moved to Autoconf or Automake where they belong. +# +# The trouble is, aclocal is a bit thick. It'll see the old AC_DEFUN +# in /usr/share/aclocal/libtool.m4 and remember it, then when it sees us +# using a macro with the same name in our local m4/libtool.m4 it'll +# pull the old libtool.m4 in (it doesn't see our shiny new m4_define +# and doesn't know about Autoconf macros at all.) +# +# So we provide this file, which has a silly filename so it's always +# included after everything else. This provides aclocal with the +# AC_DEFUNs it wants, but when m4 processes it, it doesn't do anything +# because those macros already exist, or will be overwritten later. +# We use AC_DEFUN over AU_DEFUN for compatibility with aclocal-1.6. +# +# Anytime we withdraw an AC_DEFUN or AU_DEFUN, remember to add it here. +# Yes, that means every name once taken will need to remain here until +# we give up compatibility with versions before 1.7, at which point +# we need to keep only those names which we still refer to. + +# This is to help aclocal find these macros, as it can't see m4_define. +AC_DEFUN([LTOBSOLETE_VERSION], [m4_if([1])]) + +m4_ifndef([AC_LIBTOOL_LINKER_OPTION], [AC_DEFUN([AC_LIBTOOL_LINKER_OPTION])]) +m4_ifndef([AC_PROG_EGREP], [AC_DEFUN([AC_PROG_EGREP])]) +m4_ifndef([_LT_AC_PROG_ECHO_BACKSLASH], [AC_DEFUN([_LT_AC_PROG_ECHO_BACKSLASH])]) +m4_ifndef([_LT_AC_SHELL_INIT], [AC_DEFUN([_LT_AC_SHELL_INIT])]) +m4_ifndef([_LT_AC_SYS_LIBPATH_AIX], [AC_DEFUN([_LT_AC_SYS_LIBPATH_AIX])]) +m4_ifndef([_LT_PROG_LTMAIN], [AC_DEFUN([_LT_PROG_LTMAIN])]) +m4_ifndef([_LT_AC_TAGVAR], [AC_DEFUN([_LT_AC_TAGVAR])]) +m4_ifndef([AC_LTDL_ENABLE_INSTALL], [AC_DEFUN([AC_LTDL_ENABLE_INSTALL])]) +m4_ifndef([AC_LTDL_PREOPEN], [AC_DEFUN([AC_LTDL_PREOPEN])]) +m4_ifndef([_LT_AC_SYS_COMPILER], [AC_DEFUN([_LT_AC_SYS_COMPILER])]) +m4_ifndef([_LT_AC_LOCK], [AC_DEFUN([_LT_AC_LOCK])]) +m4_ifndef([AC_LIBTOOL_SYS_OLD_ARCHIVE], [AC_DEFUN([AC_LIBTOOL_SYS_OLD_ARCHIVE])]) +m4_ifndef([_LT_AC_TRY_DLOPEN_SELF], [AC_DEFUN([_LT_AC_TRY_DLOPEN_SELF])]) +m4_ifndef([AC_LIBTOOL_PROG_CC_C_O], [AC_DEFUN([AC_LIBTOOL_PROG_CC_C_O])]) +m4_ifndef([AC_LIBTOOL_SYS_HARD_LINK_LOCKS], [AC_DEFUN([AC_LIBTOOL_SYS_HARD_LINK_LOCKS])]) +m4_ifndef([AC_LIBTOOL_OBJDIR], [AC_DEFUN([AC_LIBTOOL_OBJDIR])]) +m4_ifndef([AC_LTDL_OBJDIR], [AC_DEFUN([AC_LTDL_OBJDIR])]) +m4_ifndef([AC_LIBTOOL_PROG_LD_HARDCODE_LIBPATH], [AC_DEFUN([AC_LIBTOOL_PROG_LD_HARDCODE_LIBPATH])]) +m4_ifndef([AC_LIBTOOL_SYS_LIB_STRIP], [AC_DEFUN([AC_LIBTOOL_SYS_LIB_STRIP])]) +m4_ifndef([AC_PATH_MAGIC], [AC_DEFUN([AC_PATH_MAGIC])]) +m4_ifndef([AC_PROG_LD_GNU], [AC_DEFUN([AC_PROG_LD_GNU])]) +m4_ifndef([AC_PROG_LD_RELOAD_FLAG], [AC_DEFUN([AC_PROG_LD_RELOAD_FLAG])]) +m4_ifndef([AC_DEPLIBS_CHECK_METHOD], [AC_DEFUN([AC_DEPLIBS_CHECK_METHOD])]) +m4_ifndef([AC_LIBTOOL_PROG_COMPILER_NO_RTTI], [AC_DEFUN([AC_LIBTOOL_PROG_COMPILER_NO_RTTI])]) +m4_ifndef([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE], [AC_DEFUN([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE])]) +m4_ifndef([AC_LIBTOOL_PROG_COMPILER_PIC], [AC_DEFUN([AC_LIBTOOL_PROG_COMPILER_PIC])]) +m4_ifndef([AC_LIBTOOL_PROG_LD_SHLIBS], [AC_DEFUN([AC_LIBTOOL_PROG_LD_SHLIBS])]) +m4_ifndef([AC_LIBTOOL_POSTDEP_PREDEP], [AC_DEFUN([AC_LIBTOOL_POSTDEP_PREDEP])]) +m4_ifndef([LT_AC_PROG_EGREP], [AC_DEFUN([LT_AC_PROG_EGREP])]) +m4_ifndef([LT_AC_PROG_SED], [AC_DEFUN([LT_AC_PROG_SED])]) +m4_ifndef([_LT_CC_BASENAME], [AC_DEFUN([_LT_CC_BASENAME])]) +m4_ifndef([_LT_COMPILER_BOILERPLATE], [AC_DEFUN([_LT_COMPILER_BOILERPLATE])]) +m4_ifndef([_LT_LINKER_BOILERPLATE], [AC_DEFUN([_LT_LINKER_BOILERPLATE])]) +m4_ifndef([_AC_PROG_LIBTOOL], [AC_DEFUN([_AC_PROG_LIBTOOL])]) +m4_ifndef([AC_LIBTOOL_SETUP], [AC_DEFUN([AC_LIBTOOL_SETUP])]) +m4_ifndef([_LT_AC_CHECK_DLFCN], [AC_DEFUN([_LT_AC_CHECK_DLFCN])]) +m4_ifndef([AC_LIBTOOL_SYS_DYNAMIC_LINKER], [AC_DEFUN([AC_LIBTOOL_SYS_DYNAMIC_LINKER])]) +m4_ifndef([_LT_AC_TAGCONFIG], [AC_DEFUN([_LT_AC_TAGCONFIG])]) +m4_ifndef([AC_DISABLE_FAST_INSTALL], [AC_DEFUN([AC_DISABLE_FAST_INSTALL])]) +m4_ifndef([_LT_AC_LANG_CXX], [AC_DEFUN([_LT_AC_LANG_CXX])]) +m4_ifndef([_LT_AC_LANG_F77], [AC_DEFUN([_LT_AC_LANG_F77])]) +m4_ifndef([_LT_AC_LANG_GCJ], [AC_DEFUN([_LT_AC_LANG_GCJ])]) +m4_ifndef([AC_LIBTOOL_LANG_C_CONFIG], [AC_DEFUN([AC_LIBTOOL_LANG_C_CONFIG])]) +m4_ifndef([_LT_AC_LANG_C_CONFIG], [AC_DEFUN([_LT_AC_LANG_C_CONFIG])]) +m4_ifndef([AC_LIBTOOL_LANG_CXX_CONFIG], [AC_DEFUN([AC_LIBTOOL_LANG_CXX_CONFIG])]) +m4_ifndef([_LT_AC_LANG_CXX_CONFIG], [AC_DEFUN([_LT_AC_LANG_CXX_CONFIG])]) +m4_ifndef([AC_LIBTOOL_LANG_F77_CONFIG], [AC_DEFUN([AC_LIBTOOL_LANG_F77_CONFIG])]) +m4_ifndef([_LT_AC_LANG_F77_CONFIG], [AC_DEFUN([_LT_AC_LANG_F77_CONFIG])]) +m4_ifndef([AC_LIBTOOL_LANG_GCJ_CONFIG], [AC_DEFUN([AC_LIBTOOL_LANG_GCJ_CONFIG])]) +m4_ifndef([_LT_AC_LANG_GCJ_CONFIG], [AC_DEFUN([_LT_AC_LANG_GCJ_CONFIG])]) +m4_ifndef([AC_LIBTOOL_LANG_RC_CONFIG], [AC_DEFUN([AC_LIBTOOL_LANG_RC_CONFIG])]) +m4_ifndef([_LT_AC_LANG_RC_CONFIG], [AC_DEFUN([_LT_AC_LANG_RC_CONFIG])]) +m4_ifndef([AC_LIBTOOL_CONFIG], [AC_DEFUN([AC_LIBTOOL_CONFIG])]) +m4_ifndef([_LT_AC_FILE_LTDLL_C], [AC_DEFUN([_LT_AC_FILE_LTDLL_C])]) +m4_ifndef([_LT_REQUIRED_DARWIN_CHECKS], [AC_DEFUN([_LT_REQUIRED_DARWIN_CHECKS])]) +m4_ifndef([_LT_AC_PROG_CXXCPP], [AC_DEFUN([_LT_AC_PROG_CXXCPP])]) +m4_ifndef([_LT_PREPARE_SED_QUOTE_VARS], [AC_DEFUN([_LT_PREPARE_SED_QUOTE_VARS])]) +m4_ifndef([_LT_PROG_ECHO_BACKSLASH], [AC_DEFUN([_LT_PROG_ECHO_BACKSLASH])]) +m4_ifndef([_LT_PROG_F77], [AC_DEFUN([_LT_PROG_F77])]) +m4_ifndef([_LT_PROG_FC], [AC_DEFUN([_LT_PROG_FC])]) +m4_ifndef([_LT_PROG_CXX], [AC_DEFUN([_LT_PROG_CXX])]) diff -ru4NwbB libpng-1.5.10/scripts/macro.lst libpng-1.6.0beta22/scripts/macro.lst --- libpng-1.5.10/scripts/macro.lst 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/scripts/macro.lst 2012-01-31 07:18:25.000000000 -0600 @@ -0,0 +1,3 @@ +get_uint_32(buf) +get_uint_16(buf) +get_int_32(buf) diff -ru4NwbB libpng-1.5.10/scripts/makefile.darwin libpng-1.6.0beta22/scripts/makefile.darwin --- libpng-1.5.10/scripts/makefile.darwin 2012-03-29 00:06:56.508167982 -0500 +++ libpng-1.6.0beta22/scripts/makefile.darwin 2012-05-23 12:30:58.294697069 -0500 @@ -14,12 +14,10 @@ prefix=/usr/local exec_prefix=$(prefix) # Where the zlib library and include files are located -#ZLIBLIB=/usr/local/lib -#ZLIBINC=/usr/local/include -ZLIBLIB=../zlib -ZLIBINC=../zlib +ZLIBLIB=/usr/lib +ZLIBINC=/usr/include # Library name: LIBNAME = libpng%NN% PNGMAJ = %NN% @@ -36,9 +34,9 @@ MKDIR_P=mkdir -p LN_SF=ln -sf RANLIB=ranlib RM_F=/bin/rm -f -ARCH="-arch i386 -arch x86_64" +ARCH=-arch ppc -arch i386 -arch x86_64 # CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops CFLAGS=-I$(ZLIBINC) -W -Wall -O -funroll-loops $(ARCH) LDFLAGS=-L. -L$(ZLIBLIB) -lpng%NN% -lz $(ARCH) @@ -106,9 +104,9 @@ $(LIBSOMAJ): $(OBJSDLL) $(CC) -dynamiclib \ -install_name $(LIBPATH)/$(LIBSOMAJ) \ -current_version %SONUM% -compatibility_version %SONUM% \ - -o $(LIBSOMAJ) \ + $(ARCH) -o $(LIBSOMAJ) \ $(OBJSDLL) -L$(ZLIBLIB) -lz pngtest: pngtest.o $(LIBSO) $(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS) @@ -135,12 +133,12 @@ install-shared: install-headers $(LIBSOMAJ) libpng.pc -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi -@$(RM_F) $(DL)/$(LIBSO) - -@$(RM_F) $(DL)/$(LIBSOREL) + -@$(RM_F) $(DL)/$(LIBSOMAJ) -@$(RM_F) $(DL)/$(OLDSO) - cp $(LIBSOMAJ) $(DL)/$(LIBSOREL) - chmod 755 $(DL)/$(LIBSOREL) + cp $(LIBSOMAJ) $(DL) + chmod 755 $(DL)/$(LIBSOMAJ) (cd $(DL); \ $(LN_SF) $(LIBSOREL) $(LIBSO); \ $(LN_SF) $(LIBSO) $(OLDSO)) -@if [ ! -d $(DL)/pkgconfig ]; then $(MKDIR_P) $(DL)/pkgconfig; fi diff -ru4NwbB libpng-1.5.10/scripts/makefile.freebsd libpng-1.6.0beta22/scripts/makefile.freebsd --- libpng-1.5.10/scripts/makefile.freebsd 2012-03-29 00:06:56.550848864 -0500 +++ libpng-1.6.0beta22/scripts/makefile.freebsd 2012-05-23 12:30:58.337206249 -0500 @@ -10,10 +10,10 @@ LIB= png SHLIB_MAJOR= ${SHLIB_VER} SHLIB_MINOR= 0 -NOPROFILE= YES -NOOBJ= YES +NO_PROFILE= YES +NO_OBJ= YES # where make install puts libpng.a and png.h DESTDIR= ${PREFIX} LIBDIR= /lib @@ -24,9 +24,12 @@ MANDIR= /man/man SYMLINKS= libpng/png.h ${INCSDIR}/../png.h \ libpng/pngconf.h ${INCSDIR}/../pngconf.h \ libpng/pnglibconf.h ${INCSDIR}/../pnglibconf.h + LDADD+= -lm -lz +#LDADD+= -lm -lz -lssp_nonshared # for OSVERSION < 800000 ? + DPADD+= ${LIBM} ${LIBZ} CFLAGS+= -I. diff -ru4NwbB libpng-1.5.10/scripts/options.awk libpng-1.6.0beta22/scripts/options.awk --- libpng-1.5.10/scripts/options.awk 2012-02-24 19:17:05.386605000 -0600 +++ libpng-1.6.0beta22/scripts/options.awk 2012-03-21 07:46:23.193589000 -0500 @@ -41,9 +41,9 @@ cx= "/" ct "*" # Open C comment for output file comment=start cx # Comment start cend="*/" end # Comment end def=start "#define PNG_" ct # Arbitrary define - sup=ct "_SUPPORTED 1" end # end supported option + sup=ct "_SUPPORTED" end # end supported option und=comment "#undef PNG_" ct # Unsupported option une=ct "_SUPPORTED" cend # end unsupported option error=start "ERROR:" # error message @@ -285,25 +285,26 @@ } # Else fall through to the error handler } -# chunk NAME [requires OPT] [on|off|disabled] +# chunk NAME [requires OPT] [enables LIST] [on|off|disabled] # Expands to the 'option' settings appropriate to the reading and # writing of an ancilliary PNG chunk 'NAME': # # option READ_NAME requires READ_ANCILLARY_CHUNKS [READ_OPT] -# option READ_NAME enables NAME +# option READ_NAME enables NAME LIST # [option READ_NAME off] # option WRITE_NAME requires WRITE_ANCILLARY_CHUNKS [WRITE_OPT] -# option WRITE_NAME enables NAME +# option WRITE_NAME enables NAME LIST # [option WRITE_NAME off] pre != 0 && $1 == "chunk" && NF >= 2{ # 'chunk' is handled on the first pass by writing appropriate # 'option' lines into the intermediate file. onoff = "" reqread = "" reqwrite = "" + enables = "" i = 3 # indicates format error if (NF > 2) { # read the keywords/additional OPTS req = 0 @@ -314,23 +315,27 @@ onoff = $(i) else break # on/off conflict } + req = 0 } else if ($(i) == "requires") req = 1 - else if (req != 1) - break # bad line: handled below - else { + else if ($(i) == "enables") + req = 2 + else if (req == 1){ reqread = reqread " READ_" $(i) reqwrite = reqwrite " WRITE_" $(i) - } + } else if (req == 2) + enables = enables " " $(i) + else + break # bad line: handled below } } if (i > NF) { # Output new 'option' lines to the intermediate file (out) - print "option READ_" $2, "requires READ_ANCILLARY_CHUNKS" reqread, "enables", $2, onoff >out - print "option WRITE_" $2, "requires WRITE_ANCILLARY_CHUNKS" reqwrite, "enables", $2, onoff >out + print "option READ_" $2, "requires READ_ANCILLARY_CHUNKS" reqread, "enables", $2 enables , onoff >out + print "option WRITE_" $2, "requires WRITE_ANCILLARY_CHUNKS" reqwrite, "enables", $2 enables, onoff >out next } # Else hit the error handler below - bad line format! } diff -ru4NwbB libpng-1.5.10/scripts/pnglibconf.dfa libpng-1.6.0beta22/scripts/pnglibconf.dfa --- libpng-1.5.10/scripts/pnglibconf.dfa 2012-03-04 21:49:35.600907000 -0600 +++ libpng-1.6.0beta22/scripts/pnglibconf.dfa 2012-05-23 12:30:58.604936762 -0500 @@ -20,21 +20,25 @@ # This file is preprocessed by scripts/options.awk and the # C compiler to generate 'pnglibconf.h' - a list of all the # configuration options. The file lists the various options # that can *only* be specified during the libpng build; -# pnglibconf.h freezes the definitons selected for the specific +# pnglibconf.h freezes the definitions selected for the specific # build. # -# The syntax is detailed in scripts/options.awk, this is a summary +# The syntax is detailed in scripts/options.awk; this is a summary # only: # # setting [default] # #define PNG_ /* value comes from current setting */ # option [requires ...] [if ...] [enables ...] [disabled] # #define PNG__SUPPORTED if the requirements are met and # enable the other options listed -# chunk [requires ...] [disabled] -# Enable chunk processing for the given ancillary chunk +# chunk [requires ...] [enables ...] [disabled] +# Enable chunk processing for the given ancillary chunk; any +# 'requires something' expands to READ_something for read and +# WRITE_something for write, but the enables list members are +# used as given (e.g. enables GAMMA just expands to that on the +# correspond READ_name and WRITE_name lines.) # # Note that the 'on' and 'off' keywords, while valid on both option # and chunk, should not be used in this file because they force the # relevant options on or off. @@ -43,9 +47,9 @@ # The following setting, option and chunk values can all be changed # while building libpng: # -# setting: change 'setting' lines to fine tune library performance, +# setting: change 'setting' lines to fine tune library performance; # changes to the settings don't affect the libpng API functionally # # option: change 'option' lines to remove or add capabilities from # or to the library; options change the library API @@ -160,8 +164,15 @@ # do not release shared libraries with this changed. setting API_RULE default 0 +# This allows a prefix to be added to the front of every API functon name (and +# therefore every symbol) by redefining all the function names with the prefix +# at the end of pnglibconf.h. It also turns on similar internal symbol renaming +# by causing a similar build-time only file, pngprefix.h, to be generated. + +setting PREFIX + # Default to using the read macros setting DEFAULT_READ_MACROS default 1 @@ -178,12 +189,38 @@ option WRITE_INT_FUNCTIONS disabled option WRITE enables WRITE_INT_FUNCTIONS -# Generic options - affect both read and write. +# Error controls +# +# WARNINGS: normally on, if off no warnings are generated +# ERROR_TEXT: normally on, if off errors happen but there is no message +# ERROR_NUMBERS: unimplemented feature, therefore disabled +# BENIGN_ERRORS: support for just issuing warnings for recoverable errors +# +# BENIGN_READ_ERRORS: +# By default recoverable errors on read should just generate warnings, +# generally safe but PNG files that don't conform to the specification will +# be accepted if a meaningful result can be produced. +# +# BENIGN_WRITE_ERRORS: +# By default recoverable errors on write should just generate warnings, +# not generally safe because this allows the application to write invalid +# PNG files. Applications should enable this themselves; it's useful +# because it means that a failure to write an ancilliary chunk can often be +# ignored. option WARNINGS +option ERROR_TEXT +option ERROR_NUMBERS disabled + option BENIGN_ERRORS +option BENIGN_WRITE_ERRORS requires BENIGN_ERRORS disabled +option BENIGN_READ_ERRORS requires BENIGN_ERRORS + + +# Generic options - affect both read and write. + option MNG_FEATURES # Arithmetic options, the first is the big switch that chooses between internal # floating and fixed point arithmetic implementations - it does not affect any @@ -192,12 +229,8 @@ option FLOATING_ARITHMETIC option FLOATING_POINT enables ok_math option FIXED_POINT enables ok_math -# Added at libpng version 1.4.0 - -option ERROR_TEXT - # The following is always on (defined empty) setting CALLOC_SUPPORTED default @@ -222,12 +255,8 @@ option SETJMP = NO_SETJMP SETJMP_NOT_SUPPORTED -# For the moment this is disabled (no code support): - -option ERROR_NUMBERS disabled - # If this is disabled it is not possible for apps to get the # values from the 'info' structure, this effectively removes # quite a lot of the READ API. @@ -435,13 +464,61 @@ # These options do not affect the API but rather alter how the # API is implemented, they get recorded in pnglibconf.h, but # can't be changed by the application. -# Check the correctness of cHRM chunks +# Colorspace support (enabled as required); just the support for colorant +# information. Gamma support, likewise, is just support for the gamma +# information, READ_GAMMA is required for gamma transformations (so it +# is possible to read PNG gamma without enabling all the libpng transform +# code - do this for applications that do their own gamma processing) +# +# As of 1.6.0 COLORSPACE is only useful if the application processes the +# information; this is because the library does not do any colorspace +# processing, it just validates the data in the PNG file. + +option GAMMA disabled +option COLORSPACE enables GAMMA disabled + +# When an ICC profile is read, or png_set, it will be checked for a match +# against known sRGB profiles if the sRGB handling is enabled. This +# setting controls how much work is done during the check: +# +# 0: Just validate the profile MD5 signature if present, otherwise use +# the checks in option 1. +# +# 1: Additionally check the length, intent and adler32 checksum of the +# actual data. If enabled this will reject known profiles that have +# had the rendering intent in the header changed as well as other edits +# done without updating the checksum. See the discussion below. +# +# 2: Additionally checksum all the data using the ethernet CRC32 algorithm. +# This makes it more difficult to fake profiles and makes it less likely +# to get a false positive on profiles with no signature, but is probably +# just a waste of time since all currently approved ICC sRGB profiles have +# a secure MD5 signature. +# +# The rendering intent. An ICC profile stores an intended rendering intent, +# but does not include the value in the signature. The intent is documented +# as the intent that should be used when combining two profiles. The sRGB +# profile is intended, however, to be used with any of the four defined intents. +# For this reason the sRGB chunk includes an 'intent' to be used when displaying +# the image (intent is really a property of the image not the profile.) +# +# Unfortunately the iCCP chunk does not. It may therefore be that some +# applications modify the intent in profiles (including sRGB profiles) to work +# round this problem. Selecting an option other than option '0' will cause such +# modified profiles to be rejected. +# +# Security. The use of Adler32 and CRC32 checksums does not help significantly +# with any security issues. It is relatively easy to produce arbitrary profiles +# with the required checksums on current computer systems. Nevertheless +# security does not seem to be an issue because the only consequence of a false +# positive is a false assertion that the profile is an sRGB profile. This might +# be used to hide data from libpng using applications, but it doesn't seem +# possible to damage them. -option CHECK_cHRM requires cHRM +setting sRGB_PROFILE_CHECKS default 2 -# # Artificially align memory - the code typically aligns to 8 byte # boundaries if this is switched on, it's a small waste of space # but can help (in theory) on some architectures. Only affects # internal structures. Added at libpng 1.4.0 @@ -508,22 +585,46 @@ # it should not make much difference how big this is. setting ZBUF_SIZE default 8192 +# This is the size of the decompression buffer used when counting or checking +# the decompressed size of an LZ stream from a compressed ancilliary chunk; the +# decompressed data is never used so a different size may be optimal. This size +# was determined using contrib/libtests/timepng.c with compressed zTXt data +# around 11MByte in size. Slight speed improvements (up to about 14% in +# timepng) can be achieved by very large increases (to 32kbyte) on regular data, +# but highly compressible data shows only around 2% improvement. The size is +# chosen to minimize the effects of DoS attacks based on using very large +# amounts of highly compressible data. + +setting INFLATE_BUF_SIZE default 1024 + +# This is the maximum amount of IDAT data that the sequential reader will +# process at one time. The setting does not affect the size of IDAT chunks +# read, just the amount read at once. Neither does it affect the progressive +# reader, which processes just the amount of data the application gives it. +# The sequential reader is currently unable to process more than one IDAT at +# once - it has to read and process each one in turn. There is no point setting +# this to a value larger than the IDAT chunks typically encountered (it would +# just waste memory) but there may be some point in reducing it below the value +# of ZBUF_SIZE (the size of IDAT chunks written by libpng.) + +setting IDAT_READ_SIZE default PNG_ZBUF_SIZE + # Ancillary chunks chunk bKGD -chunk cHRM -chunk gAMA +chunk cHRM enables COLORSPACE +chunk gAMA enables GAMMA chunk hIST -chunk iCCP +chunk iCCP enables COLORSPACE GAMMA chunk iTXt chunk oFFs chunk pCAL -chunk sCAL chunk pHYs chunk sBIT +chunk sCAL chunk sPLT -chunk sRGB +chunk sRGB enables COLORSPACE GAMMA chunk tEXt requires TEXT chunk tIME chunk tRNS chunk zTXt @@ -587,4 +688,32 @@ option CHECK_FOR_INVALID_INDEX enables WRITE_CHECK_FOR_INVALID_INDEX option READ_CHECK_FOR_INVALID_INDEX requires READ CHECK_FOR_INVALID_INDEX option WRITE_CHECK_FOR_INVALID_INDEX requires WRITE CHECK_FOR_INVALID_INDEX +# Simplified API options (added at libpng-1.6.0) +# Read: +option SIMPLIFIED_READ requires SEQUENTIAL_READ READ_TRANSFORMS SETJMP +option SIMPLIFIED_READ requires BENIGN_ERRORS +option SIMPLIFIED_READ enables READ_EXPAND READ_16BIT READ_EXPAND_16 +option SIMPLIFIED_READ enables READ_SCALE_16_TO_8 READ_RGB_TO_GRAY +option SIMPLIFIED_READ enables READ_ALPHA_MODE READ_BACKGROUND READ_STRIP_ALPHA +option SIMPLIFIED_READ enables READ_FILLER READ_SWAP + +option SIMPLIFIED_READ_AFIRST requires SIMPLIFIED_READ disabled +option READ_SWAP_ALPHA enables SIMPLIFIED_READ_AFIRST + +option SIMPLIFIED_READ_BGR requires SIMPLIFIED_READ disabled +option READ_BGR enables SIMPLIFIED_READ_BGR + +# Write: +option SIMPLIFIED_WRITE requires WRITE STDIO SETJMP +option SIMPLIFIED_WRITE enables WRITE_SWAP WRITE_gAMA WRITE_sRGB WRITE_cHRM + +option SIMPLIFIED_WRITE_AFIRST requires SIMPLIFIED_WRITE disabled +option WRITE_SWAP_ALPHA enables SIMPLIFIED_WRITE_AFIRST + +option SIMPLIFIED_WRITE_BGR requires SIMPLIFIED_WRITE disabled +option WRITE_BGR enables SIMPLIFIED_WRITE_BGR + +# Formats: +option FORMAT_AFIRST if SIMPLIFIED_READ_AFIRST SIMPLIFIED_WRITE_AFIRST +option FORMAT_BGR if SIMPLIFIED_READ_BGR SIMPLIFIED_WRITE_BGR diff -ru4NwbB libpng-1.5.10/scripts/pnglibconf.h.prebuilt libpng-1.6.0beta22/scripts/pnglibconf.h.prebuilt --- libpng-1.5.10/scripts/pnglibconf.h.prebuilt 2012-03-29 00:06:56.807777736 -0500 +++ libpng-1.6.0beta22/scripts/pnglibconf.h.prebuilt 2012-05-23 12:30:58.616122765 -0500 @@ -25,34 +25,42 @@ #define PNG_CALLOC_SUPPORTED #define PNG_COST_SHIFT 3 #define PNG_DEFAULT_READ_MACROS 1 #define PNG_GAMMA_THRESHOLD_FIXED 5000 +#define PNG_IDAT_READ_SIZE PNG_ZBUF_SIZE +#define PNG_INFLATE_BUF_SIZE 1024 #define PNG_MAX_GAMMA_8 11 #define PNG_QUANTIZE_BLUE_BITS 5 #define PNG_QUANTIZE_GREEN_BITS 5 #define PNG_QUANTIZE_RED_BITS 5 #define PNG_sCAL_PRECISION 5 +#define PNG_sRGB_PROFILE_CHECKS 2 #define PNG_WEIGHT_SHIFT 8 #define PNG_ZBUF_SIZE 8192 /* end of settings */ /* options */ #define PNG_16BIT_SUPPORTED #define PNG_ALIGN_MEMORY_SUPPORTED #define PNG_BENIGN_ERRORS_SUPPORTED +#define PNG_BENIGN_READ_ERRORS_SUPPORTED +/*#undef PNG_BENIGN_WRITE_ERRORS_SUPPORTED*/ #define PNG_bKGD_SUPPORTED #define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED -#define PNG_CHECK_cHRM_SUPPORTED #define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED #define PNG_cHRM_SUPPORTED +#define PNG_COLORSPACE_SUPPORTED #define PNG_CONSOLE_IO_SUPPORTED #define PNG_CONVERT_tIME_SUPPORTED #define PNG_EASY_ACCESS_SUPPORTED /*#undef PNG_ERROR_NUMBERS_SUPPORTED*/ #define PNG_ERROR_TEXT_SUPPORTED #define PNG_FIXED_POINT_SUPPORTED #define PNG_FLOATING_ARITHMETIC_SUPPORTED #define PNG_FLOATING_POINT_SUPPORTED +#define PNG_FORMAT_AFIRST_SUPPORTED +#define PNG_FORMAT_BGR_SUPPORTED #define PNG_gAMA_SUPPORTED +#define PNG_GAMMA_SUPPORTED #define PNG_HANDLE_AS_UNKNOWN_SUPPORTED #define PNG_hIST_SUPPORTED #define PNG_iCCP_SUPPORTED #define PNG_INCH_CONVERSIONS_SUPPORTED @@ -115,16 +123,23 @@ #define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED #define PNG_READ_USER_CHUNKS_SUPPORTED #define PNG_READ_USER_TRANSFORM_SUPPORTED #define PNG_READ_zTXt_SUPPORTED +/*#undef PNG_SAFE_LIMITS_SUPPORTED*/ #define PNG_SAVE_INT_32_SUPPORTED #define PNG_sBIT_SUPPORTED #define PNG_sCAL_SUPPORTED #define PNG_SEQUENTIAL_READ_SUPPORTED #define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED #define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED #define PNG_SETJMP_SUPPORTED #define PNG_SET_USER_LIMITS_SUPPORTED +#define PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED +#define PNG_SIMPLIFIED_READ_BGR_SUPPORTED +#define PNG_SIMPLIFIED_READ_SUPPORTED +#define PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED +#define PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED +#define PNG_SIMPLIFIED_WRITE_SUPPORTED #define PNG_sPLT_SUPPORTED #define PNG_sRGB_SUPPORTED #define PNG_STDIO_SUPPORTED #define PNG_tEXt_SUPPORTED diff -ru4NwbB libpng-1.5.10/scripts/pnglibconf.mak libpng-1.6.0beta22/scripts/pnglibconf.mak --- libpng-1.5.10/scripts/pnglibconf.mak 2011-11-08 19:12:49.536424000 -0600 +++ libpng-1.6.0beta22/scripts/pnglibconf.mak 2012-02-23 18:09:46.000000000 -0600 @@ -17,9 +17,10 @@ COPY = cp DELETE = rm -f ECHO = echo -DFA_XTRA = # Appended to scripts/options.awk +DFA_XTRA = # Put your configuration file here, see scripts/pnglibconf.dfa. Eg: +# DFA_XTRA = pngusr.dfa # CPPFLAGS should contain the options to control the result, # but DEFS and CFLAGS are also supported here, override # as appropriate @@ -40,15 +41,15 @@ $(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' dfn2.out >dfn3.out $(COPY) dfn3.out $@ $(DELETE) dfn.c dfn1.out dfn2.out dfn3.out -pnglibconf.dfn: $(srcdir)/scripts/pnglibconf.dfa $(srcdir)/scripts/options.awk $(srcdir)/pngconf.h +pnglibconf.dfn: $(srcdir)/scripts/pnglibconf.dfa $(srcdir)/scripts/options.awk $(srcdir)/pngconf.h $(srcdir)/pngusr.dfa $(DELETE) $@ dfn1.out dfn2.out $(ECHO) "Calling $(AWK) from scripts/pnglibconf.mak" >&2 $(ECHO) "If 'awk' crashes try a better awk (e.g. AWK='nawk')" >&2 $(AWK) -f $(srcdir)/scripts/options.awk out=dfn1.out version=search\ $(srcdir)/pngconf.h $(srcdir)/scripts/pnglibconf.dfa\ - $(DFA_XTRA) 1>&2 + $(srcdir)/pngusr.dfa $(DFA_XTRA) 1>&2 $(AWK) -f $(srcdir)/scripts/options.awk out=dfn2.out dfn1.out 1>&2 $(COPY) dfn2.out $@ $(DELETE) dfn1.out dfn2.out diff -ru4NwbB libpng-1.5.10/scripts/prefix.dfn libpng-1.6.0beta22/scripts/prefix.dfn --- libpng-1.5.10/scripts/prefix.dfn 1969-12-31 18:00:00.000000000 -0600 +++ libpng-1.6.0beta22/scripts/prefix.dfn 2012-01-31 07:18:34.000000000 -0600 @@ -0,0 +1,20 @@ + +/* prefix.dfn - generate an unprefixed symbol list + * + * Last changed in libpng version 1.6.0 [January 30, 2012] + * Copyright (c) 2012 Glenn Randers-Pehrson + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#define PNG_EXPORTA(ordinal, type, name, args, attributes)\ + PNG_DEFN_MAGIC-name-PNG_DEFN_END + +/* The configuration information *before* the additional of symbol renames, + * the list is the C name list; no symbol prefix. + */ +#include "pnglibconf.out" + +#include "../png.h" diff -ru4NwbB libpng-1.5.10/scripts/symbols.def libpng-1.6.0beta22/scripts/symbols.def --- libpng-1.5.10/scripts/symbols.def 2012-03-29 00:06:56.818823277 -0500 +++ libpng-1.6.0beta22/scripts/symbols.def 2012-05-23 12:30:58.627265664 -0500 @@ -204,9 +204,9 @@ png_get_x_offset_inches @196 png_get_y_offset_inches @197 png_get_pHYs_dpi @198 png_get_io_state @199 - png_get_io_chunk_name @200 +;png_get_io_chunk_name @200 png_get_uint_32 @201 png_get_uint_16 @202 png_get_int_32 @203 png_get_uint_31 @204 @@ -238,5 +238,13 @@ png_get_cHRM_XYZ @230 png_get_cHRM_XYZ_fixed @231 png_set_cHRM_XYZ @232 png_set_cHRM_XYZ_fixed @233 - png_set_check_for_invalid_index @234 + png_image_begin_read_from_file @234 + png_image_begin_read_from_stdio @235 + png_image_begin_read_from_memory @236 + png_image_finish_read @237 + png_image_free @238 + png_image_write_to_file @239 + png_image_write_to_stdio @240 + png_convert_to_rfc1123_buffer @241 + png_set_check_for_invalid_index @242