[libpng10] Imported from libpng-1.0.43rc01.tar

ANNOUNCE

@@ -1,32 +1,63 @@
 
-Libpng 1.2.8 - December 3, 2004
+Libpng 1.0.43rc01 - February 12, 2009
 
-This is a public release of libpng, intended for use in production codes.
+This is not intended to be a public release.  It will be replaced
+within a few weeks by a public version or by another test version.
 
-Changes since the last public release (1.2.7):
+Files available for download:
 
-  Fixed bug in png_text_compress() that would fail to complete a large block.
-  Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
-    strip alpha operation in png_do_strip_filler().
-  Added PNG_1_2_X definition in pngconf.h
-  #ifdef out png_info_init in png.c and png_read_init in pngread.c (as of 1.3.0)
-  Reduce color_type to a nonalpha type after strip alpha operation in
-    png_do_strip_filler().
-  Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM
-  Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).
-  Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).
-  Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection
-    of data type in deflate (Cosmin).
-  Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of
-    PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
-  Despammed mailing addresses by masking "@" with "at".
-  Added scripts/makefile.elf with supporting code in pngconf.h for symbol
-    versioning (John Bowler).
-  Added projects/visualc71 (Simon-pierre).
+Source files with LF line endings (for Unix/Linux) and with a
+"configure" script
 
-Send comments/corrections/commendations to
-png-implement at ccrc.wustl.edu (subscription required; write to
-majordomo at ccrc.wustl.edu with "subscribe png-implement" in the message)
-or to glennrp at users.sourceforge.net
+   libpng-1.0.43rc01.tar.gz
+   libpng-1.0.43rc01.tar.lzma
+     (Get the lzma codec from <http://tukaani.org/lzma>).
+   libpng-1.0.43rc01.tar.bz2
+
+Source files with LF line endings (for Unix/Linux) without the
+"configure" script
+
+   libpng-1.0.43rc01-no-config.tar.gz
+   libpng-1.0.43rc01-no-config.tar.lzma
+   libpng-1.0.43rc01-no-config.tar.bz2
+
+Source files with CRLF line endings (for Windows), without the
+"configure" script
+
+   lp1043r01.zip
+   lp1043r01.7z
+   lp1043r01.tar.bz2
+
+Project files
+
+   libpng-1.0.43rc01-project-netware.zip
+   libpng-1.0.43rc01-project-wince.zip
+
+Other information:
+
+   libpng-1.0.43rc01-README.txt
+   libpng-1.0.43rc01-KNOWNBUGS.txt
+   libpng-1.0.43rc01-LICENSE.txt
+   libpng-1.0.43rc01-Y2K-compliance.txt
+   libpng-1.0.43rc01-[previous version]-diff.txt
+
+Changes since the last public release (1.0.42):
+
+
+version 1.2.35beta01 [February 4, 2009]
+  Zero out some arrays of pointers after png_malloc(). (Tavis Ormandy)
+
+version 1.2.35beta02 [Feburary 4, 2009]
+  Zero out more arrays of pointers after png_malloc().
+
+version 1.2.35beta03 [February 12, 2009]
+  Use png_memset() instead of a loop to intialize pointers.  We realize
+    this will not work on platforms where the NULL pointer is not all zeroes.
+
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+
+(subscription required; visit 
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe) or to glennrp at users.sourceforge.net
 
 Glenn R-P

INSTALL

@@ -1,17 +1,51 @@
 
-Installing libpng version 1.2.8 - %DATE%
+Installing libpng version 1.0.43rc01 - February 12, 2009
 
-Before installing libpng, you must first install zlib.  zlib
-can usually be found wherever you got libpng.  zlib can be
-placed in another directory, at the same level as libpng.
-Note that your system might already have a preinstalled
-zlib, but you will still need to have access to the
-zlib.h and zconf.h include files that correspond to the
-version of zlib that's installed.
+On Unix/Linux and similar systems, you can simply type
+
+    ./configure [--prefix=/path]
+    make check
+    make install
+
+and ignore the rest of this document.
+
+If configure does not work on your system and you have a reasonably
+up-to-date set of tools, running ./autogen.sh before running ./configure
+may fix the problem.  You can also run the individual commands in
+autogen.sh with the --force option, if supported by your version of
+the tools.  If you run 'libtoolize --force', though, this will replace
+the distributed, patched, version of ltmain.sh with an unpatched version
+and your shared library builds may fail to produce libraries with the
+correct version numbers.
+
+Instead, you can use one of the custom-built makefiles in the
+"scripts" directory
+
+    cp scripts/makefile.system makefile
+    make test
+    make install
+
+Or you can use one of the "projects" in the "projects" directory.
+
+If you want to use "cmake" (see www.cmake.org), copy CMakeLists.txt
+from the "scripts" directory to this directory and type
+
+   cmake . [-DPNG_MMX=YES] -DCMAKE_INSTALL_PREFIX=/path
+   make
+   make install
+
+Before installing libpng, you must first install zlib, if it
+is not already on your system.  zlib can usually be found
+wherever you got libpng.  zlib can be placed in another directory,
+at the same level as libpng.
+
+If your system already has a preinstalled zlib you will still need
+to have access to the zlib.h and zconf.h include files that
+correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.2.8" or "lpng109" and "zlib-1.1.3"
-or "zlib113") so that you have directories called "zlib" and "libpng".
+might be called "libpng-1.0.43rc01" or "lpng109" and "zlib-1.2.1"
+or "zlib121") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
 
@@ -23,14 +57,13 @@ Your directory structure should look like this:
           *.c
           contrib
              gregbook
-             msvctest
              pngminus
              pngsuite
              visupng
           projects
              beos
-             borland
-             msvc
+             c5builder (Borland)
+             visualc6 (msvc)
              netware.txt
              wince.txt
           scripts
@@ -48,48 +81,58 @@ If the line endings in the files look funny, you may wish to get the other
 distribution of libpng.  It is available in both tar.gz (UNIX style line
 endings) and zip (DOS style line endings) formats.
 
-If you are building libpng with MSVC, you can enter the libpng\msvc directory
-and follow the instructions in msvc\README.txt.
+If you are building libpng with MSVC, you can enter the
+libpng projects\visualc6 directory and follow the instructions in
+projects\visualc6\README.txt.
 
-You can build libpng for WindowsCE by entering the downloading and installing
-the libpng\wince directory as instructed in the projects\wince.txt file, and
+You can build libpng for WindowsCE by downloading and installing
+the projects\wince directory as instructed in the projects\wince.txt file, and
 then following the instructions in the README* files.  Similarly, you can
-build libpng for Netware as instructed in projects\netware.txt.
+build libpng for Netware or Beos as instructed in projects\netware.txt
+or projects\beos.
 
 Else enter the zlib directory and follow the instructions in zlib/README,
-then come back here and choose the appropriate makefile.sys in the scripts
-directory.
+then come back here and run "configure" or choose the appropriate
+makefile.sys in the scripts directory.
 
 The files that are presently available in the scripts directory
 include
 
+ CMakeLists.txt    =>  "cmake" script
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
- makefile.linux    =>  Linux/ELF makefile (gcc, creates libpng%SONAME%.so.%SONUM%.1.2.8)
- makefile.gcmmx    =>  Linux/ELF makefile (gcc, creates libpng%SONAME%.so.%SONUM%.1.2.8,
-                       uses assembler code tuned for Intel MMX platform)
+ makefile.elf      =>  Linux/ELF makefile symbol versioning,
+                       gcc, creates libpng10.so.0.1.0.43rc01)
+ makefile.linux    =>  Linux/ELF makefile
+                       (gcc, creates libpng10.so.0.1.0.43rc01)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
                        ftp://ftp.cs.wisc.edu/ghost)
  makefile.aix      =>  AIX/gcc makefile
  makefile.cygwin   =>  Cygwin/gcc makefile
- makefile.darwin   =>  Darwin makefile
+ makefile.darwin   =>  Darwin makefile, can use on MacosX
  makefile.dec      =>  DEC Alpha UNIX makefile
- makefile.hpgcc    =>  FreeBSD makefile
+ makefile.freebsd  =>  FreeBSD makefile
  makefile.hpgcc    =>  HPUX makefile using gcc
  makefile.hpux     =>  HPUX (10.20 and 11.00) makefile
+ makefile.hp64     =>  HPUX (10.20 and 11.00) makefile, 64-bit
  makefile.ibmc     =>  IBM C/C++ version 3.x for Win32 and OS/2 (static)
  makefile.intel    =>  Intel C/C++ version 4.0 and later
  libpng.icc        =>  Project file for IBM VisualAge/C++ version 4.0 or later
- makefile.macosx   =>  MACOS X Makefile
  makefile.netbsd   =>  NetBSD/cc makefile, uses PNGGCCRD, makes libpng.so.
- makefile.ne%SONUM%bsd  =>  NetBSD/cc makefile, uses PNGGCCRD, makes libpng%SONUM%.so
+ makefile.ne10bsd  =>  NetBSD/cc makefile, uses PNGGCCRD,
+                       makes libpng10.so
  makefile.openbsd  =>  OpenBSD makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
- makefile.sggcc    =>  Silicon Graphics (gcc, creates libpng%SONAME%.so.%SONUM%.1.2.8)
+ makefile.sggcc    =>  Silicon Graphics (gcc,
+                       creates libpng10.so.0.1.0.43rc01)
  makefile.sunos    =>  Sun makefile
- makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng%SONAME%.so.%SONUM%.1.2.8)
- makefile.so9      =>  Solaris 9 makefile (gcc, creates libpng%SONAME%.so.%SONUM%.1.2.8)
+ makefile.solaris  =>  Solaris 2.X makefile (gcc,
+                       creates libpng10.so.0.1.0.43rc01)
+ makefile.solaris-x86 =>  Solaris/intelMMX 2.X makefile (gcc,
+                       creates libpng10.so.0.1.0.43rc01)
+ makefile.so9      =>  Solaris 9 makefile (gcc,
+                       creates libpng10.so.0.1.0.43rc01)
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
  makefile.64sunu   =>  Sun Ultra 64-bit makefile
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
@@ -102,20 +145,15 @@ include
  makefile.beos     =>  BEOS makefile for X86
  makefile.bor      =>  Borland makefile (uses bcc)
  makefile.bc32     =>  32-bit Borland C++ (all modules compiled in C mode)
- makefile.bd32     =>  To make a png32bd.dll with Borland C++ 4.5
  makefile.tc3      =>  Turbo C 3.0 makefile
  makefile.dj2      =>  DJGPP 2 makefile
  makefile.msc      =>  Microsoft C makefile
- makefile.vcawin32 =>  makefile for Microsoft Visual C++ 5.0 and later (uses
-                       assembler code tuned for Intel MMX platform)
- makefile.vcwin32  =>  makefile for Microsoft Visual C++ 4.0 and later (does
-                       not use assembler code)
+ makefile.vcwin32  =>  makefile for Microsoft Visual C++ 4.0 and later
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires pngos2.def)
  pngos2.def        =>  OS/2 module definition file used by makefile.os2
  makefile.watcom   =>  Watcom 10a+ Makefile, 32-bit flat memory model
  makevms.com       =>  VMS build script
  descrip.mms       =>  VMS makefile for MMS or MMK
- pngdef.pas        =>  Defines for a png32bd.dll with Borland C++ 4.5
  SCOPTIONS.ppc     =>  Used with smakefile.ppc
 
 Copy the file (or files) that you need from the
@@ -130,13 +168,13 @@ target directories to match your preferences.
 Then read pngconf.h to see if you want to make any configuration
 changes.
 
-Then just run "make test" which will create the libpng library in
-this directory and run a quick test that reads the "pngtest.png"
-file and writes a "pngout.png" file that should be identical to it.
-Look for "9782 zero samples" in the output of the test.  For more
-confidence, you can run another test by typing "pngtest pngnow.png"
-and looking for "289 zero samples" in the output.  Also, you can
-run "pngtest -m *.png" in the "contrib/pngsuite" directory and compare
+Then just run "make" which will create the libpng library in
+this directory and "make test" which will run a quick test that reads
+the "pngtest.png" file and writes a "pngout.png" file that should be
+identical to it.  Look for "9782 zero samples" in the output of the
+test.  For more confidence, you can run another test by typing
+"pngtest pngnow.png" and looking for "289 zero samples" in the output.
+Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
 your output with the result shown in contrib/pngsuite/README.
 
 Most of the makefiles will allow you to run "make install" to
@@ -145,9 +183,20 @@ do that, run "make install" in the zlib directory first if necessary).
 Some also allow you to run "make test-installed" after you have
 run "make install".
 
+If you encounter a compiler error message complaining about the
+lines
+      __png.h__ already includes setjmp.h;
+      __dont__ include it again.;
+This means you have compiled another module that includes setjmp.h,
+which is hazardous because the two modules might not include exactly
+the same setjmp.h.  If you are sure that you know what you are doing
+and that they are exactly the same, then you can comment out or
+delete the two lines.  Better yet, use the cexcept interface
+instead, as demonstrated in contrib/visupng of the libpng distribution.
+
 Further information can be found in the README and libpng.txt
-files, in the individual makefiles, in png.h, in the README files in
-subdirectories of the LIB directory, and the manual pages libpng.3 and png.5.
+files, in the individual makefiles, in png.h, and the manual pages
+libpng.3 and png.5.
 
 
 Using the ./configure script -- 16 December 2002.
@@ -160,7 +209,7 @@ which previously was done semi-automatically (if you didn't edit
 scripts/makefile.* yourself, that is)
 
 
-CFLAGS="-Wall -O3 -funroll-loops \
+CFLAGS="-Wall -O -funroll-loops \
 -malign-loops=2 -malign-functions=2" ./configure --prefix=/usr/include \
 --with-pkgconfigdir=/usr/lib/pkgconfig --includedir=/usr/include
 

KNOWNBUG

@@ -1,11 +1,22 @@
 
-Known bugs in libpng version 1.2.8
+Known bugs in libpng version 1.0.43rc01
 
-1. April 22, 2001: pnggccrd.c has been reported to crash on NetBSD when
-   reading interlaced PNG files, when assembler code is enabled but running
-   on a non-MMX i386 platform.
+1. February 23, 2006: The custom makefiles don't build libpng with -lz.
 
-   STATUS: Under investigation.  The change to pnggccrd.c in libpng-1.2.1
-   fixed a problem under FreeBSD but not the problem with NetBSD, which
-   still fails as of libpng-1.2.2rc1.
+   STATUS: This is a subject of debate. The change will probably be made
+   as a part of a major overhaul of the makefiles in libpng version 1.4.0.
+
+2. February 24, 2006: The Makefile generated by the "configure" script
+   fails to install symbolic links
+   libpng12.so => libpng12.so.0.1.2.9betaN
+   that are generated by the custom makefiles.
+
+3. September 4, 2007:  There is a report that pngtest crashes on MacOS 10.
+
+   STATUS: workarounds are
+      1) Compile without optimization (crashes are observed with
+         -arch i386 and -O2 or -O3, using gcc-4.0.1).
+      2) Compile pngtest.c with PNG_DEBUG defined (the bug goes away if
+         you try to look at it).
+      3) Ignore the crash.  The library itself seems to be OK.
 

LICENSE

@@ -8,8 +8,8 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng version 1.2.6, December 3, 2004, is
-Copyright (c) 2004 Glenn Randers-Pehrson, and is
+libpng versions 1.2.6, August 15, 2004, through 1.0.43rc01, February 12, 2009, are
+Copyright (c) 2004, 2006-2008 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
 
@@ -106,4 +106,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-December 3, 2004
+February 12, 2009

Makefile.am

@@ -1,66 +1,152 @@
-# test
+# Makefile.am:
+#   Source file for Makefile.in (and hence Makefile)
+#
+# Makefile.am need only be changed on a major version number
+# change (e.g. libpng12 --> libpng13).  In that case seach
+# this file for every instance of the old base name (libpng12)
+# and change to the new one (libpng13), then change the
+# -version-number settings below so that the new values have
+# the correct major part (first field).
+
+PNGLIB_BASENAME= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
+
+# libpng does not follow GNU file name conventions
+AUTOMAKE_OPTIONS = foreign
+
+# test programs - run on make check, make distcheck
 check_PROGRAMS= pngtest
 pngtest_SOURCES = pngtest.c
-pngtest_LDADD = libpng.la
+pngtest_LDADD = libpng10.la
 TESTS = test-pngtest.sh
 TESTS_ENVIRONMENT= srcdir=$(srcdir) 
-dist_man_MANS= libpng.3 libpngpf.3 png.5
-include_HEADERS= png.h pngconf.h 
-bin_SCRIPTS=libpng-config libpng12-config 
 
-#rules to build libpng
-lib_LTLIBRARIES=libpng12.la libpng.la
-libpng12_la_SOURCES = png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
+# man pages
+dist_man_MANS= libpng.3 libpngpf.3 png.5
+
+# generate the -config scripts if required
+binconfigs= libpng10-config 
+EXTRA_SCRIPTS= libpng-config libpng10-config
+bin_SCRIPTS= @binconfigs@
+
+# rules to build libpng, only build the old library on request
+lib_LTLIBRARIES=libpng10.la @compatlib@
+EXTRA_LTLIBRARIES= libpng.la
+libpng10_la_SOURCES = png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c \
-	png.h pngconf.h 
-libpng_la_SOURCES = $(libpng12_la_SOURCES)
-libpng12_la_LDFLAGS = -export-dynamic -version-info $(LIBPNG12_VERSION_INFO)
-libpng_la_LDFLAGS = -export-dynamic -version-info $(LIBPNG3_VERSION_INFO)
+	png.h pngconf.h
+libpng_la_SOURCES = $(libpng10_la_SOURCES)
+
+libpng_la_CPPFLAGS = @LIBPNG_DEFINES@
+libpng10_la_CPPFLAGS = @LIBPNG_DEFINES@
+
+# MAJOR UPGRADE: the version-number settings below must be changed.
+libpng10_la_LDFLAGS = -no-undefined -export-dynamic \
+	-version-number 0:@PNGLIB_RELEASE@:0
+# -rpath is needed as automake doesn't know the directory
+libpng_la_LDFLAGS = -rpath '$(libdir)' -no-undefined -export-dynamic \
+	-version-number 2:@PNGLIB_RELEASE@:0
+
+if HAVE_LD_VERSION_SCRIPT
+  # Versioned symbols and restricted exports
+  libpng10_la_LDFLAGS += -Wl,--version-script=libpng.vers
+  libpng10_la_DEPENDENCIES = libpng.vers
+else
+  # Only restricted exports when possible
+  libpng10_la_LDFLAGS += -export-symbols libpng.sym
+  libpng10_la_DEPENDENCIES = libpng.sym
+endif
+libpng_la_DEPENDENCIES = $(libpng10_la_DEPENDENCIES)
+
+# Avoid depending upon Character Ranges.
+AN = '_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
 
 #distribute headers in /usr/include/libpng/*
+pkgincludedir= $(includedir)/$(PNGLIB_BASENAME)
 pkginclude_HEADERS= png.h pngconf.h
 
+# pkg-config stuff, note that libpng.pc is always required in order
+# to get the correct library
+pkgconfigdir = @pkgconfigdir@
+pkgconfig_DATA = libpng10.pc
+
 #extra source distribution files.
-EXTRA_DIST= ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO \
+EXTRA_DIST= \
+	ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO \
 	pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \
-	${srcdir}/projects/cbuilder5/* ${srcdir}/projects/beos/* ${srcdir}/projects/visualc6/* \
-	${srcdir}/projects/wince.txt ${srcdir}/projects/netware.txt \
+	${srcdir}/projects/cbuilder5/* \
+	${srcdir}/projects/beos/* \
+	${srcdir}/projects/visualc6/* \
+	${srcdir}/projects/visualc71/* \
+	${srcdir}/projects/wince.txt \
+	${srcdir}/projects/netware.txt \
 	${srcdir}/scripts/* \
 	${srcdir}/contrib/gregbook/* \
 	${srcdir}/contrib/pngminus/* \
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng.txt pngasmrd.h pnggccrd.c pngvcrd.c 
+	example.c libpng-1.0.43rc01.txt pngvcrd.c 
 
-CLEANFILES= pngout.png libpng.pc libpng12.pc libpng-config libpng12-config
+CLEANFILES= pngout.png libpng10.pc libpng10-config libpng.vers \
+libpng.sym
 
+MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \
+config.sub configure depcomp install-sh ltmain.sh missing
 
-libpng.pc:
-	cat ${srcdir}/scripts/libpng.pc.in | \
-	sed -e 's,[@]PREFIX[@],$(prefix),' -e 's,[@]INCLUDEDIR[@],$(includedir),' > libpng.pc
+$(PNGLIB_BASENAME).pc: libpng.pc
+	cp libpng.pc $@
 
-libpng12.pc: libpng.pc
-	cp libpng.pc libpng12.pc
+$(PNGLIB_BASENAME)-config: libpng-config
+	cp libpng-config $@
 
-install-data-local: libpng.pc libpng12.pc
-	@INSTALL@ -d @PKGCONFIGDIR@
-	@INSTALL_DATA@ libpng.pc @PKGCONFIGDIR@
-	@INSTALL_DATA@ libpng12.pc @PKGCONFIGDIR@
+libpng.sym: png.h pngconf.h
+	rm -f $@ $@.new
+	$(CPP) @LIBPNG_DEFINES@ $(CPPFLAGS) -DPNG_BUILDSYMS $(srcdir)/png.h | \
+		$(SED) -n -e \
+		's|^.*PNG_FUNCTION_EXPORT[ 	]*\([$(AN)]*\).*$$|$(SYMBOL_PREFIX)\1|p' \
+		-e 's|^.*PNG_DATA_EXPORT[ 	]*\([$(AN)]*\).*$$|$(SYMBOL_PREFIX)\1|p' \
+			>$@.new
+	mv $@.new $@
 
-uninstall-local:
-	rm -f @PKGCONFIGDIR@/libpng.pc
-	rm -f @PKGCONFIGDIR@/libpng12.pc
+libpng.vers: libpng.sym
+	rm -f $@ $@.new
+	echo PNG@PNGLIB_MAJOR@@PNGLIB_MINOR@_0 '{global:' > $@.new
+	$(SED) s/$$/\;/ libpng.sym >> $@.new
+	echo 'local: *; };' >> $@.new
+	mv $@.new $@
 
-libpng-config:
-	( cat ${srcdir}/scripts/libpng-config-head.in; \
-	echo prefix=\"$(prefix)\"; \
-	echo I_opts=\"-I$(includedir)\"; \
-	echo L_opts=\"-L$(libdir)\"; \
-	echo R_opts=\"-Wl,-rpath,$(libdir)\"; \
-	echo libs=\"-lpng12 -lz -lm\"; \
-	cat ${srcdir}/scripts/libpng-config-body.in ) > libpng-config
+test: check
 
-libpng12-config: libpng-config
-	cp libpng-config libpng12-config
+# install the .../include headers as links to the new ones
+install-data-hook:
+	cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h
+	cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/png.h png.h
+	cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/pngconf.h pngconf.h
+	cd $(DESTDIR)$(pkgconfigdir); rm -f libpng.pc
+	cd $(DESTDIR)$(pkgconfigdir); $(LN_S) $(PNGLIB_BASENAME).pc libpng.pc
+
+# do evil things to libpng to cause libpng10 to be used
+install-exec-hook:
+	cd $(DESTDIR)$(bindir); rm -f libpng-config
+	cd $(DESTDIR)$(bindir); $(LN_S) $(PNGLIB_BASENAME)-config libpng-config
+	@set -x;\
+	cd $(DESTDIR)$(libdir);\
+	for ext in a la so sl dylib; do\
+		rm -f libpng.$$ext;\
+                if test -f $(PNGLIB_BASENAME).$$ext; then\
+                       $(LN_S) $(PNGLIB_BASENAME).$$ext libpng.$$ext;\
+                fi;\
+	done
+
+uninstall-hook:
+	cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h
+	rm -f $(DESTDIR)$(pkgconfigdir)/libpng.pc
+	rm -f $(DESTDIR)$(bindir)/libpng-config
+	@if test -n "@compatlib@"; then\
+		set -x;\
+		cd $(DESTDIR)$(libdir);\
+		for ext in a la so sl dylib; do\
+			rm -f libpng.$$ext;\
+		done;\
+	fi

README

@@ -1,11 +1,15 @@
-README for libpng version 1.2.8 - December 3, 2004 (shared library 12.0)
+README for libpng version 1.0.43rc01 - February 12, 2009 (shared library 10.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
 
-Libpng comes in several distribution formats.  Get libpng-*.tar.gz
-or libpng-*.tar.bz2 if you want UNIX-style line endings in the text
-files, or lpng*.zip if you want DOS-style line endings.
+Libpng comes in several distribution formats.  Get libpng-*.tar.gz,
+libpng-*.tar.lzma, or libpng-*.tar.bz2 if you want UNIX-style line
+endings in the text files, or lpng*.7z or lpng*.zip if you want DOS-style
+line endings.  You can get UNIX-style line endings from the *.zip file
+by using "unzip -a" but there seems to be no simple way to recover
+UNIX-style line endings from the *.7z file.  The *.tar.lzma file is
+recommended for *NIX users instead.
 
 Version 0.89 was the first official release of libpng.  Don't let the
 fact that it's the first release fool you.  The libpng library has been in
@@ -54,7 +58,7 @@ to set different actions based on whether the CRC error occurred in a
 critical or an ancillary chunk.
 
 The changes made to the library, and bugs fixed are based on discussions
-on the PNG-implement mailing list
+on the png-mng-implement mailing list
 and not on material submitted privately to Guy, Andreas, or Glenn.  They will
 forward any good suggestions to the list.
 
@@ -77,12 +81,12 @@ compression library that is useful for more things than just PNG files.
 You can use zlib as a drop-in replacement for fread() and fwrite() if
 you are so inclined.
 
-zlib should be available at the same place that libpng is, or at.
-ftp://ftp.info-zip.org/pub/infozip/zlib
+zlib should be available at the same place that libpng is, or at
+ftp://ftp.simplesystems.org/pub/png/src/
 
 You may also want a copy of the PNG specification.  It is available
 as an RFC, a W3C Recommendation, and an ISO/IEC Standard.  You can find
-these at http://www.libpng.org/pub/png/documents/
+these at http://www.libpng.org/pub/png/pngdocs.html
 
 This code is currently being archived at libpng.sf.net in the
 [DOWNLOAD] area, and on CompuServe, Lib 20 (PNG SUPPORT)
@@ -103,20 +107,21 @@ fix.  Please mention "libpng" somewhere in the subject line.  Thanks.
 This release was created and will be supported by myself (of course
 based in a large way on Guy's and Andreas' earlier work), and the PNG group.
 
-glennrp at users.sourceforge.net
-png-implement at ccrc.wustl.edu (subscription required; write to
-majordomo at ccrc.wustl.edu with "subscribe png-implement" in the message).
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+(subscription required; visit 
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe) or to glennrp at users.sourceforge.net
 
 You can't reach Guy, the original libpng author, at the addresses
 given in previous versions of this document.  He and Andreas will read mail
-addressed to the png-implement list, however.
+addressed to the png-mng-implement list, however.
 
 Please do not send general questions about PNG.  Send them to
-the (png-list at ccrc.wustl.edu, subscription required, write to
-majordomo at ccrc.wustl.edu with "subscribe png-list" in your message).
+the (png-mng-misc at lists.sourceforge.net, subscription required, visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement to subscribe)
 On the other hand,
 please do not send libpng questions to that address, send them to me
-or to the png-implement list.  I'll
+or to the png-mng-implement list.  I'll
 get them in the end anyway.  If you have a question about something
 in the PNG specification that is related to using libpng, send it
 to me.  Send me any questions that start with "I was using libpng,
@@ -124,7 +129,7 @@ and ...".  If in doubt, send questions to me.  I'll bounce them
 to others, if necessary.
 
 Please do not send suggestions on how to change PNG.  We have
-been discussing PNG for nine years now, and it is official and
+been discussing PNG for twelve years now, and it is official and
 finished.  If you have suggestions for libpng, however, I'll
 gladly listen.  Even if your suggestion is not used immediately,
 it may be used later.
@@ -139,6 +144,7 @@ Files in this distribution:
       TODO          =>  Things not implemented in the current library
       Y2KINFO       =>  Statement of Y2K compliance
       example.c     =>  Example code for using libpng functions
+      libpng-*-*-diff.txt => Diff from previous release
       libpng.3      =>  manual page for libpng (includes libpng.txt)
       libpng.txt    =>  Description of libpng and its functions
       libpngpf.3    =>  manual page for libpng's private functions
@@ -146,7 +152,6 @@ Files in this distribution:
       png.c         =>  Basic interface functions common to library
       png.h         =>  Library function and interface declarations
       pngconf.h     =>  System specific library configuration
-      pngasmrd.h    =>  Header file for assembler-coded functions
       pngerror.c    =>  Error/warning message I/O functions
       pngget.c      =>  Functions for retrieving info from struct
       pngmem.c      =>  Memory handling functions
@@ -189,11 +194,11 @@ Files in this distribution:
        descrip.mms      =>  VMS makefile for MMS or MMK
        makefile.std     =>  Generic UNIX makefile (cc, creates static libpng.a)
        makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            gcc, creates libpng12.so.0.1.2.8)
+                            gcc, creates libpng10.so.0.1.0.43rc01)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.8)
+                            (gcc, creates libpng10.so.0.1.0.43rc01)
        makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.8,
+                            (gcc, creates libpng10.so.0.1.0.43rc01,
                             uses assembler code tuned for Intel MMX platform)
        makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
        makefile.knr     =>  Archaic UNIX Makefile that converts files with
@@ -211,16 +216,16 @@ Files in this distribution:
        makefile.intel   =>  Intel C/C++ version 4.0 and later
        libpng.icc       =>  Project file, IBM VisualAge/C++ 4.0 or later
        makefile.netbsd  =>  NetBSD/cc makefile, PNGGCCRD, makes libpng.so.
-       makefile.ne12bsd  =>  NetBSD/cc makefile, PNGGCCRD, makes libpng12.so
+       makefile.ne10bsd  =>  NetBSD/cc makefile, PNGGCCRD, makes libpng10.so
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng12.so.0.1.2.8)
+                            (gcc, creates libpng10.so.0.1.0.43rc01)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng12.so.0.1.2.8)
+                            (gcc, creates libpng10.so.0.1.0.43rc01)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng12.so.0.1.2.8)
+                            (gcc, creates libpng10.so.0.1.0.43rc01)
        makefile.32sunu  =>  Sun Ultra 32-bit makefile
        makefile.64sunu  =>  Sun Ultra 64-bit makefile
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc
@@ -255,7 +260,7 @@ Good luck, and happy coding.
 
 -Andreas Eric Dilger (former maintainer, 1996-1997)
  Internet: adilger at enel.ucalgary.ca
- Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
+ Web: http://members.shaw.ca/adilger/
 
 -Guy Eric Schalnat (original author and former maintainer, 1995-1996)
  (formerly of Group 42, Inc)

Y2KINFO

@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      December 3, 2004
+      February 12, 2009
 
       Since the PNG Development group is an ad-hoc body, we can't make
       an official declaration.
 
       This is your unofficial assurance that libpng from version 0.71 and
-      upward through 1.2.8 are Y2K compliant.  It is my belief that earlier
+      upward through 1.0.43rc01 are Y2K compliant.  It is my belief that earlier
       versions were also Y2K compliant.
 
       Libpng only has three year fields.  One is a 2-byte unsigned integer

autogen.sh

@@ -1,5 +1,25 @@
 #! /bin/sh
 # a quick hack script to generate necessary files from 
 # auto* tools.
-
-libtoolize -c -f && aclocal && autoheader && automake --foreign -a -c && autoconf
+#
+# WARNING: if you run this you will change the versions
+# of the tools which are used and, maybe, required!
+        touch Makefile.am configure.ac
+{
+	echo "running libtoolize" >&2
+	libtoolize --force --copy --automake
+} && {
+	echo "running aclocal" >&2
+	aclocal
+} && {
+	echo "running autoheader [ignore the warnings]" >&2
+	autoheader
+} && {
+	echo "running automake" >&2
+	automake --force-missing --foreign -a -c
+} && {
+	echo "running autoconf" >&2
+	autoconf
+} &&
+	echo "autogen complete" >&2 ||
+	echo "ERROR: autogen.sh failed, autogen is incomplete" >&2

config.h.in

@@ -3,9 +3,6 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
-/* Define to 1 if you have the <fcntl.h> header file. */
-#undef HAVE_FCNTL_H
-
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
@@ -15,10 +12,6 @@
 /* Define to 1 if you have the `z' library (-lz). */
 #undef HAVE_LIBZ
 
-/* Define to 1 if your system has a GNU libc compatible `malloc' function, and
-   to 0 otherwise. */
-#undef HAVE_MALLOC
-
 /* Define to 1 if you have the <malloc.h> header file. */
 #undef HAVE_MALLOC_H
 
@@ -43,9 +36,6 @@
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
-/* Define to 1 if you have the `strrchr' function. */
-#undef HAVE_STRRCHR
-
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
@@ -55,6 +45,10 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#undef LT_OBJDIR
+
 /* Name of package */
 #undef PACKAGE
 
@@ -85,8 +79,5 @@
 /* Define to empty if `const' does not conform to ANSI C. */
 #undef const
 
-/* Define to rpl_malloc if the replacement function should be used. */
-#undef malloc
-
-/* Define to `unsigned' if <sys/types.h> does not define. */
+/* Define to `unsigned int' if <sys/types.h> does not define. */
 #undef size_t

config.sub

@@ -1,9 +1,10 @@
 #! /bin/sh
 # Configuration validation subroutine script.
 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-#   2000, 2001, 2002 Free Software Foundation, Inc.
+#   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+#   Free Software Foundation, Inc.
 
-timestamp='2002-11-30'
+timestamp='2008-01-16'
 
 # This file is (in principle) common to ALL GNU software.
 # The presence of a machine in this file suggests that SOME GNU software
@@ -21,14 +22,15 @@ timestamp='2002-11-30'
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330,
-# Boston, MA 02111-1307, USA.
-
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+# 02110-1301, USA.
+#
 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
 # configuration script generated by Autoconf, you may include it under
 # the same distribution terms that you use for the rest of that program.
 
+
 # Please send patches to <config-patches@gnu.org>.  Submit a context
 # diff and a properly formatted ChangeLog entry.
 #
@@ -70,8 +72,8 @@ Report bugs and patches to <config-patches@gnu.org>."
 version="\
 GNU config.sub ($timestamp)
 
-Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
-Free Software Foundation, Inc.
+Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
 
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
@@ -83,11 +85,11 @@ Try \`$me --help' for more information."
 while test $# -gt 0 ; do
   case $1 in
     --time-stamp | --time* | -t )
-       echo "$timestamp" ; exit 0 ;;
+       echo "$timestamp" ; exit ;;
     --version | -v )
-       echo "$version" ; exit 0 ;;
+       echo "$version" ; exit ;;
     --help | --h* | -h )
-       echo "$usage"; exit 0 ;;
+       echo "$usage"; exit ;;
     -- )     # Stop option processing
        shift; break ;;
     - )	# Use stdin as input.
@@ -99,7 +101,7 @@ while test $# -gt 0 ; do
     *local*)
        # First pass through any local machine types.
        echo $1
-       exit 0;;
+       exit ;;
 
     * )
        break ;;
@@ -118,7 +120,9 @@ esac
 # Here we must recognize all the valid KERNEL-OS combinations.
 maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
 case $maybe_os in
-  nto-qnx* | linux-gnu* | freebsd*-gnu* | netbsd*-gnu* | storm-chaos* | os2-emx* | rtmk-nova*)
+  nto-qnx* | linux-gnu* | linux-dietlibc | linux-newlib* | linux-uclibc* | \
+  uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | netbsd*-gnu* | \
+  storm-chaos* | os2-emx* | rtmk-nova*)
     os=-$maybe_os
     basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
     ;;
@@ -144,7 +148,7 @@ case $os in
 	-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
 	-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
 	-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \
-	-apple | -axis)
+	-apple | -axis | -knuth | -cray)
 		os=
 		basic_machine=$1
 		;;
@@ -169,6 +173,10 @@ case $os in
 	-hiux*)
 		os=-hiuxwe2
 		;;
+	-sco6)
+		os=-sco5v6
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
 	-sco5)
 		os=-sco3.2v5
 		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
@@ -185,6 +193,10 @@ case $os in
 		# Don't forget version if it is 3.2v4 or newer.
 		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
 		;;
+	-sco5v6*)
+		# Don't forget version if it is 3.2v4 or newer.
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
 	-sco*)
 		os=-sco3.2v2
 		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
@@ -228,14 +240,17 @@ case $basic_machine in
 	| a29k \
 	| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
 	| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
-	| arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | avr \
-	| clipper \
+	| am33_2.0 \
+	| arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | avr | avr32 \
+	| bfin \
+	| c4x | clipper \
 	| d10v | d30v | dlx | dsp16xx \
-	| fr30 | frv \
+	| fido | fr30 | frv \
 	| h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
 	| i370 | i860 | i960 | ia64 \
-	| ip2k \
-	| m32r | m68000 | m68k | m88k | mcore \
+	| ip2k | iq2000 \
+	| m32c | m32r | m32rle | m68000 | m68k | m88k \
+	| maxq | mb | microblaze | mcore | mep \
 	| mips | mipsbe | mipseb | mipsel | mipsle \
 	| mips16 \
 	| mips64 | mips64el \
@@ -244,25 +259,33 @@ case $basic_machine in
 	| mips64vr4100 | mips64vr4100el \
 	| mips64vr4300 | mips64vr4300el \
 	| mips64vr5000 | mips64vr5000el \
+	| mips64vr5900 | mips64vr5900el \
 	| mipsisa32 | mipsisa32el \
+	| mipsisa32r2 | mipsisa32r2el \
 	| mipsisa64 | mipsisa64el \
+	| mipsisa64r2 | mipsisa64r2el \
 	| mipsisa64sb1 | mipsisa64sb1el \
 	| mipsisa64sr71k | mipsisa64sr71kel \
 	| mipstx39 | mipstx39el \
 	| mn10200 | mn10300 \
+	| mt \
+	| msp430 \
+	| nios | nios2 \
 	| ns16k | ns32k \
-	| openrisc | or32 \
+	| or32 \
 	| pdp10 | pdp11 | pj | pjl \
 	| powerpc | powerpc64 | powerpc64le | powerpcle | ppcbe \
 	| pyramid \
-	| sh | sh[1234] | sh3e | sh[34]eb | shbe | shle | sh[1234]le | sh3ele \
+	| score \
+	| sh | sh[1234] | sh[24]a | sh[23]e | sh[34]eb | sheb | shbe | shle | sh[1234]le | sh3ele \
 	| sh64 | sh64le \
-	| sparc | sparc64 | sparc86x | sparclet | sparclite | sparcv9 | sparcv9b \
-	| strongarm \
-	| tahoe | thumb | tic80 | tron \
+	| sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet | sparclite \
+	| sparcv8 | sparcv9 | sparcv9b | sparcv9v \
+	| spu | strongarm \
+	| tahoe | thumb | tic4x | tic80 | tron \
 	| v850 | v850e \
 	| we32k \
-	| x86 | xscale | xstormy16 | xtensa \
+	| x86 | xc16x | xscale | xscalee[bl] | xstormy16 | xtensa \
 	| z8k)
 		basic_machine=$basic_machine-unknown
 		;;
@@ -273,6 +296,9 @@ case $basic_machine in
 		;;
 	m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65 | z8k)
 		;;
+	ms1)
+		basic_machine=mt-unknown
+		;;
 
 	# We use `pc' rather than `unknown'
 	# because (1) that's what they normally are, and
@@ -292,20 +318,20 @@ case $basic_machine in
 	| alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
 	| alphapca5[67]-* | alpha64pca5[67]-* | arc-* \
 	| arm-*  | armbe-* | armle-* | armeb-* | armv*-* \
-	| avr-* \
-	| bs2000-* \
-	| c[123]* | c30-* | [cjt]90-* | c4x-* | c54x-* \
-	| clipper-* | cydra-* \
+	| avr-* | avr32-* \
+	| bfin-* | bs2000-* \
+	| c[123]* | c30-* | [cjt]90-* | c4x-* | c54x-* | c55x-* | c6x-* \
+	| clipper-* | craynv-* | cydra-* \
 	| d10v-* | d30v-* | dlx-* \
 	| elxsi-* \
-	| f30[01]-* | f700-* | fr30-* | frv-* | fx80-* \
+	| f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
 	| h8300-* | h8500-* \
 	| hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \
 	| i*86-* | i860-* | i960-* | ia64-* \
-	| ip2k-* \
-	| m32r-* \
+	| ip2k-* | iq2000-* \
+	| m32c-* | m32r-* | m32rle-* \
 	| m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \
-	| m88110-* | m88k-* | mcore-* \
+	| m88110-* | m88k-* | maxq-* | mcore-* \
 	| mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \
 	| mips16-* \
 	| mips64-* | mips64el-* \
@@ -314,29 +340,43 @@ case $basic_machine in
 	| mips64vr4100-* | mips64vr4100el-* \
 	| mips64vr4300-* | mips64vr4300el-* \
 	| mips64vr5000-* | mips64vr5000el-* \
+	| mips64vr5900-* | mips64vr5900el-* \
 	| mipsisa32-* | mipsisa32el-* \
+	| mipsisa32r2-* | mipsisa32r2el-* \
 	| mipsisa64-* | mipsisa64el-* \
+	| mipsisa64r2-* | mipsisa64r2el-* \
 	| mipsisa64sb1-* | mipsisa64sb1el-* \
 	| mipsisa64sr71k-* | mipsisa64sr71kel-* \
-	| mipstx39 | mipstx39el \
+	| mipstx39-* | mipstx39el-* \
+	| mmix-* \
+	| mt-* \
+	| msp430-* \
+	| nios-* | nios2-* \
 	| none-* | np1-* | ns16k-* | ns32k-* \
 	| orion-* \
 	| pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
 	| powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* | ppcbe-* \
 	| pyramid-* \
 	| romp-* | rs6000-* \
-	| sh-* | sh[1234]-* | sh3e-* | sh[34]eb-* | shbe-* \
+	| sh-* | sh[1234]-* | sh[24]a-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \
 	| shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
-	| sparc-* | sparc64-* | sparc86x-* | sparclet-* | sparclite-* \
-	| sparcv9-* | sparcv9b-* | strongarm-* | sv1-* | sx?-* \
-	| tahoe-* | thumb-* | tic30-* | tic4x-* | tic54x-* | tic80-* | tron-* \
+	| sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \
+	| sparclite-* \
+	| sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | strongarm-* | sv1-* | sx?-* \
+	| tahoe-* | thumb-* \
+	| tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \
+	| tron-* \
 	| v850-* | v850e-* | vax-* \
 	| we32k-* \
-	| x86-* | x86_64-* | xps100-* | xscale-* | xstormy16-* \
-	| xtensa-* \
+	| x86-* | x86_64-* | xc16x-* | xps100-* | xscale-* | xscalee[bl]-* \
+	| xstormy16-* | xtensa*-* \
 	| ymp-* \
 	| z8k-*)
 		;;
+	# Recognize the basic CPU types without company name, with glob match.
+	xtensa*)
+		basic_machine=$basic_machine-unknown
+		;;
 	# Recognize the various machine names and aliases which stand
 	# for a CPU type and a company and sometimes even an OS.
 	386bsd)
@@ -353,6 +393,9 @@ case $basic_machine in
 		basic_machine=a29k-amd
 		os=-udi
 		;;
+    	abacus)
+		basic_machine=abacus-unknown
+		;;
 	adobe68k)
 		basic_machine=m68010-adobe
 		os=-scout
@@ -367,6 +410,12 @@ case $basic_machine in
 		basic_machine=a29k-none
 		os=-bsd
 		;;
+	amd64)
+		basic_machine=x86_64-pc
+		;;
+	amd64-*)
+		basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
 	amdahl)
 		basic_machine=580-amdahl
 		os=-sysv
@@ -398,6 +447,14 @@ case $basic_machine in
 		basic_machine=ns32k-sequent
 		os=-dynix
 		;;
+	blackfin)
+		basic_machine=bfin-unknown
+		os=-linux
+		;;
+	blackfin-*)
+		basic_machine=bfin-`echo $basic_machine | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
 	c90)
 		basic_machine=c90-cray
 		os=-unicos
@@ -426,12 +483,27 @@ case $basic_machine in
 		basic_machine=j90-cray
 		os=-unicos
 		;;
+	craynv)
+		basic_machine=craynv-cray
+		os=-unicosmp
+		;;
+	cr16)
+		basic_machine=cr16-unknown
+		os=-elf
+		;;
 	crds | unos)
 		basic_machine=m68k-crds
 		;;
+	crisv32 | crisv32-* | etraxfs*)
+		basic_machine=crisv32-axis
+		;;
 	cris | cris-* | etrax*)
 		basic_machine=cris-axis
 		;;
+	crx)
+		basic_machine=crx-unknown
+		os=-elf
+		;;
 	da30 | da30-*)
 		basic_machine=m68k-da30
 		;;
@@ -454,6 +526,10 @@ case $basic_machine in
 		basic_machine=m88k-motorola
 		os=-sysv3
 		;;
+	djgpp)
+		basic_machine=i586-pc
+		os=-msdosdjgpp
+		;;
 	dpx20 | dpx20-*)
 		basic_machine=rs6000-bull
 		os=-bosx
@@ -604,6 +680,14 @@ case $basic_machine in
 		basic_machine=m68k-isi
 		os=-sysv
 		;;
+	m68knommu)
+		basic_machine=m68k-unknown
+		os=-linux
+		;;
+	m68knommu-*)
+		basic_machine=m68k-`echo $basic_machine | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
 	m88k-omron*)
 		basic_machine=m88k-omron
 		;;
@@ -619,6 +703,10 @@ case $basic_machine in
 		basic_machine=i386-pc
 		os=-mingw32
 		;;
+	mingw32ce)
+		basic_machine=arm-unknown
+		os=-mingw32ce
+		;;
 	miniframe)
 		basic_machine=m68000-convergent
 		;;
@@ -632,10 +720,6 @@ case $basic_machine in
 	mips3*)
 		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
 		;;
-	mmix*)
-		basic_machine=mmix-knuth
-		os=-mmixware
-		;;
 	monitor)
 		basic_machine=m68k-rom68k
 		os=-coff
@@ -648,6 +732,9 @@ case $basic_machine in
 		basic_machine=i386-pc
 		os=-msdos
 		;;
+	ms1-*)
+		basic_machine=`echo $basic_machine | sed -e 's/ms1-/mt-/'`
+		;;
 	mvs)
 		basic_machine=i370-ibm
 		os=-mvs
@@ -723,9 +810,12 @@ case $basic_machine in
 		basic_machine=hppa1.1-oki
 		os=-proelf
 		;;
-	or32 | or32-*)
+	openrisc | openrisc-*)
 		basic_machine=or32-unknown
-		os=-coff
+		;;
+	os400)
+		basic_machine=powerpc-ibm
+		os=-os400
 		;;
 	OSE68000 | ose68000)
 		basic_machine=m68000-ericsson
@@ -743,6 +833,14 @@ case $basic_machine in
 		basic_machine=i860-intel
 		os=-osf
 		;;
+	parisc)
+		basic_machine=hppa-unknown
+		os=-linux
+		;;
+	parisc-*)
+		basic_machine=hppa-`echo $basic_machine | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
 	pbd)
 		basic_machine=sparc-tti
 		;;
@@ -752,24 +850,36 @@ case $basic_machine in
 	pc532 | pc532-*)
 		basic_machine=ns32k-pc532
 		;;
+	pc98)
+		basic_machine=i386-pc
+		;;
+	pc98-*)
+		basic_machine=i386-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
 	pentium | p5 | k5 | k6 | nexgen | viac3)
 		basic_machine=i586-pc
 		;;
 	pentiumpro | p6 | 6x86 | athlon | athlon_*)
 		basic_machine=i686-pc
 		;;
-	pentiumii | pentium2)
+	pentiumii | pentium2 | pentiumiii | pentium3)
 		basic_machine=i686-pc
 		;;
+	pentium4)
+		basic_machine=i786-pc
+		;;
 	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
 		basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
 		;;
 	pentiumpro-* | p6-* | 6x86-* | athlon-*)
 		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
 		;;
-	pentiumii-* | pentium2-*)
+	pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
 		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
 		;;
+	pentium4-*)
+		basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
 	pn)
 		basic_machine=pn-gould
 		;;
@@ -802,6 +912,10 @@ case $basic_machine in
 		basic_machine=i586-unknown
 		os=-pw32
 		;;
+	rdos)
+		basic_machine=i386-pc
+		os=-rdos
+		;;
 	rom68k)
 		basic_machine=m68k-rom68k
 		os=-coff
@@ -828,6 +942,14 @@ case $basic_machine in
 	sb1el)
 		basic_machine=mipsisa64sb1el-unknown
 		;;
+	sde)
+		basic_machine=mipsisa32-sde
+		os=-elf
+		;;
+	sei)
+		basic_machine=mips-sei
+		os=-seiux
+		;;
 	sequent)
 		basic_machine=i386-sequent
 		;;
@@ -835,6 +957,12 @@ case $basic_machine in
 		basic_machine=sh-hitachi
 		os=-hms
 		;;
+	sh5el)
+		basic_machine=sh5le-unknown
+		;;
+	sh64)
+		basic_machine=sh64-unknown
+		;;
 	sparclite-wrs | simso-wrs)
 		basic_machine=sparclite-wrs
 		os=-vxworks
@@ -901,10 +1029,6 @@ case $basic_machine in
 		basic_machine=i386-sequent
 		os=-dynix
 		;;
-	t3d)
-		basic_machine=alpha-cray
-		os=-unicos
-		;;
 	t3e)
 		basic_machine=alphaev5-cray
 		os=-unicos
@@ -913,14 +1037,22 @@ case $basic_machine in
 		basic_machine=t90-cray
 		os=-unicos
 		;;
-        tic4x | c4x*)
-		basic_machine=tic4x-unknown
-		os=-coff
-		;;
 	tic54x | c54x*)
 		basic_machine=tic54x-unknown
 		os=-coff
 		;;
+	tic55x | c55x*)
+		basic_machine=tic55x-unknown
+		os=-coff
+		;;
+	tic6x | c6x*)
+		basic_machine=tic6x-unknown
+		os=-coff
+		;;
+	tile*)
+		basic_machine=tile-unknown
+		os=-linux-gnu
+		;;
 	tx39)
 		basic_machine=mipstx39-unknown
 		;;
@@ -934,6 +1066,10 @@ case $basic_machine in
 	tower | tower-32)
 		basic_machine=m68k-ncr
 		;;
+	tpf)
+		basic_machine=s390x-ibm
+		os=-tpf
+		;;
 	udi29k)
 		basic_machine=a29k-amd
 		os=-udi
@@ -977,6 +1113,10 @@ case $basic_machine in
 		basic_machine=hppa1.1-winbond
 		os=-proelf
 		;;
+	xbox)
+		basic_machine=i686-pc
+		os=-mingw32
+		;;
 	xps | xps100)
 		basic_machine=xps100-honeywell
 		;;
@@ -1007,6 +1147,9 @@ case $basic_machine in
 	romp)
 		basic_machine=romp-ibm
 		;;
+	mmix)
+		basic_machine=mmix-knuth
+		;;
 	rs6000)
 		basic_machine=rs6000-ibm
 		;;
@@ -1023,13 +1166,10 @@ case $basic_machine in
 	we32k)
 		basic_machine=we32k-att
 		;;
-	sh3 | sh4 | sh3eb | sh4eb | sh[1234]le | sh3ele)
+	sh[1234] | sh[24]a | sh[34]eb | sh[1234]le | sh[23]ele)
 		basic_machine=sh-unknown
 		;;
-	sh64)
-		basic_machine=sh64-unknown
-		;;
-	sparc | sparcv9 | sparcv9b)
+	sparc | sparcv8 | sparcv9 | sparcv9b | sparcv9v)
 		basic_machine=sparc-sun
 		;;
 	cydra)
@@ -1102,19 +1242,23 @@ case $os in
 	      | -aos* \
 	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
 	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
-	      | -hiux* | -386bsd* | -netbsd* | -openbsd* | -freebsd* | -riscix* \
-	      | -lynxos* | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
+	      | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \
+	      | -openbsd* | -solidbsd* \
+	      | -ekkobsd* | -kfreebsd* | -freebsd* | -riscix* | -lynxos* \
+	      | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
 	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
 	      | -chorusos* | -chorusrdb* \
 	      | -cygwin* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
-	      | -mingw32* | -linux-gnu* | -uxpv* | -beos* | -mpeix* | -udk* \
+	      | -mingw32* | -linux-gnu* | -linux-newlib* | -linux-uclibc* \
+	      | -uxpv* | -beos* | -mpeix* | -udk* \
 	      | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* | -opened* \
 	      | -openstep* | -oskit* | -conix* | -pw32* | -nonstopux* \
 	      | -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \
 	      | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
 	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
-	      | -powermax* | -dnix*)
+	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
+	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-qnx*)
@@ -1132,12 +1276,15 @@ case $os in
 		os=`echo $os | sed -e 's|nto|nto-qnx|'`
 		;;
 	-sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \
-	      | -windows* | -osx | -abug | -netware* | -os9* | -beos* \
+	      | -windows* | -osx | -abug | -netware* | -os9* | -beos* | -haiku* \
 	      | -macos* | -mpw* | -magic* | -mmixware* | -mon960* | -lnews*)
 		;;
 	-mac*)
 		os=`echo $os | sed -e 's|mac|macos|'`
 		;;
+	-linux-dietlibc)
+		os=-linux-dietlibc
+		;;
 	-linux*)
 		os=`echo $os | sed -e 's|linux|linux-gnu|'`
 		;;
@@ -1150,6 +1297,9 @@ case $os in
 	-opened*)
 		os=-openedition
 		;;
+        -os400*)
+		os=-os400
+		;;
 	-wince*)
 		os=-wince
 		;;
@@ -1171,6 +1321,9 @@ case $os in
 	-atheos*)
 		os=-atheos
 		;;
+	-syllable*)
+		os=-syllable
+		;;
 	-386bsd)
 		os=-bsd
 		;;
@@ -1193,6 +1346,9 @@ case $os in
 	-sinix*)
 		os=-sysv4
 		;;
+        -tpf*)
+		os=-tpf
+		;;
 	-triton*)
 		os=-sysv3
 		;;
@@ -1223,6 +1379,15 @@ case $os in
 	-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
 		os=-mint
 		;;
+	-aros*)
+		os=-aros
+		;;
+	-kaos*)
+		os=-kaos
+		;;
+	-zvmoe)
+		os=-zvmoe
+		;;
 	-none)
 		;;
 	*)
@@ -1245,6 +1410,12 @@ else
 # system, and we'll never get to this point.
 
 case $basic_machine in
+        score-*)
+		os=-elf
+		;;
+        spu-*)
+		os=-elf
+		;;
 	*-acorn)
 		os=-riscix1.2
 		;;
@@ -1254,6 +1425,9 @@ case $basic_machine in
 	arm*-semi)
 		os=-aout
 		;;
+        c4x-* | tic4x-*)
+        	os=-coff
+		;;
 	# This must come before the *-dec entry.
 	pdp10-*)
 		os=-tops20
@@ -1279,6 +1453,9 @@ case $basic_machine in
 	m68*-cisco)
 		os=-aout
 		;;
+        mep-*)
+		os=-elf
+		;;
 	mips*-cisco)
 		os=-elf
 		;;
@@ -1297,9 +1474,15 @@ case $basic_machine in
 	*-be)
 		os=-beos
 		;;
+	*-haiku)
+		os=-haiku
+		;;
 	*-ibm)
 		os=-aix
 		;;
+    	*-knuth)
+		os=-mmixware
+		;;
 	*-wec)
 		os=-proelf
 		;;
@@ -1432,9 +1615,15 @@ case $basic_machine in
 			-mvs* | -opened*)
 				vendor=ibm
 				;;
+			-os400*)
+				vendor=ibm
+				;;
 			-ptx*)
 				vendor=sequent
 				;;
+			-tpf*)
+				vendor=ibm
+				;;
 			-vxsim* | -vxworks* | -windiss*)
 				vendor=wrs
 				;;
@@ -1459,7 +1648,7 @@ case $basic_machine in
 esac
 
 echo $basic_machine$os
-exit 0
+exit
 
 # Local variables:
 # eval: (add-hook 'write-file-hooks 'time-stamp)

configure.ac

@@ -1,19 +1,52 @@
-# Process this file with autoconf to produce a configure script.
-m4_define(PNGPKG_VERSION,[1.2.8-automake])
-AC_INIT([libpng], PNGPKG_VERSION, png-implement@ccrc.wustl.edu)
-AM_INIT_AUTOMAKE([libpng], PNGPKG_VERSION)
+# configure.ac
+
+dnl Process this file with autoconf to produce a configure script.
+dnl
+dnl Minor upgrades (compatible ABI): increment the package version
+dnl (third field in two places below) and set the PNGLIB_RELEASE
+dnl variable.
+dnl
+dnl Major upgrades (incompatible ABI): increment the package major
+dnl version (second field, or first if desired), set the minor
+dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in
+dnl Makefile.am to upgrade the package name.
+
+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)
+
+dnl Version number stuff here:
+
+AC_INIT([libpng], [1.0.43rc01], [png-mng-implement@lists.sourceforge.net])
+AM_INIT_AUTOMAKE
+dnl stop configure from automagically running automake
+AM_MAINTAINER_MODE
+
+PNGLIB_VERSION=1.0.43rc01
+PNGLIB_MAJOR=1
+PNGLIB_MINOR=0
+PNGLIB_RELEASE=43
+
+dnl End of version number stuff
+
 AC_CONFIG_SRCDIR([pngget.c])
-AM_CONFIG_HEADER([config.h])
+AM_CONFIG_HEADER(config.h)
 
 # Checks for programs.
 AC_PROG_CC
+AC_PROG_LD
+AC_PROG_CPP
+AC_CHECK_TOOL(SED, sed, :)
+AC_LIBTOOL_WIN32_DLL
+AC_PROG_INSTALL
+AC_PROG_LN_S
 AC_PROG_MAKE_SET
 AC_PROG_LIBTOOL
 
 # Checks for header files.
-AC_PATH_X
 AC_HEADER_STDC
-AC_CHECK_HEADERS([fcntl.h malloc.h stdlib.h string.h strings.h unistd.h])
+AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
@@ -21,21 +54,95 @@ AC_TYPE_SIZE_T
 AC_STRUCT_TM
 
 # Checks for library functions.
-AC_FUNC_MALLOC
 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_LIB(z, zlibVersion, , AC_ERROR([zlib not installed]))
 
-AC_CHECK_FUNCS([memset pow strrchr])
-AC_CHECK_FUNC(sqrt, , AC_CHECK_LIB(m, sqrt,, [cannot find sqrt]))
-AC_CHECK_LIB(z, zlibVersion,, AC_ERROR([ZLib not installed]))
+LIBPNG_DEFINES=-DPNG_CONFIGURE_LIBPNG
+AC_MSG_CHECKING(
+  [if assembler code in pnggccrd.c can be compiled without PNG_NO_MMX_CODE])
+AC_TRY_COMPILE(
+  [#include "$srcdir/pnggccrd.c"],
+  [return 0;],
+  AC_MSG_RESULT(yes)
+  LIBPNG_NO_MMX="",
+  AC_MSG_RESULT(no)
+  LIBPNG_NO_MMX=-DPNG_NO_MMX_CODE)
+LIBPNG_DEFINES=$LIBPNG_DEFINES\ $LIBPNG_NO_MMX
+AC_SUBST(LIBPNG_DEFINES)
+AC_SUBST(LIBPNG_NO_MMX)
 
-AC_ARG_WITH(pkgconfigdir, AC_HELP_STRING([--with-pkgconfigdir],[Use the specified pkgconfig dir (default is prefix/lib/pkgconfig)]),[PKGCONFIGDIR=${withval}],[PKGCONFIGDIR='${prefix}/lib/pkgconfig'])
+AC_MSG_CHECKING([if libraries can be versioned])
+GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
+if test "$GLD"; then
+    have_ld_version_script=yes
+    AC_MSG_RESULT(yes)
+else
+    have_ld_version_script=no
+    AC_MSG_RESULT(no)
+    AC_MSG_WARN(*** You have not enabled versioned symbols.)
+fi
+AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
 
-AC_MSG_CHECKING([pkgconfig directory])
-AC_MSG_RESULT([$PKGCONFIGDIR])
-AC_SUBST([PKGCONFIGDIR])
+if test "$have_ld_version_script" = "yes"; then
+    AC_MSG_CHECKING([for symbol prefix])
+    SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \
+                   | ${CPP-${CC-gcc} -E} - 2>&1 \
+                   | ${EGREP-grep} "^PREFIX=" \
+                   | ${SED-sed} "s:^PREFIX=::"`
+    AC_SUBST(SYMBOL_PREFIX)
+    AC_MSG_RESULT($SYMBOL_PREFIX)
+fi
 
-AC_SUBST(LIBPNG12_VERSION_INFO,0:0:0)
-AC_SUBST(LIBPNG3_VERSION_INFO,3:0:0)
+# Substitutions for .in files
+AC_SUBST(PNGLIB_VERSION)
+AC_SUBST(PNGLIB_MAJOR)
+AC_SUBST(PNGLIB_MINOR)
+AC_SUBST(PNGLIB_RELEASE)
+
+# Additional arguments (and substitutions)
+# Allow the pkg-config directory to be set
+AC_ARG_WITH(pkgconfigdir,
+	AC_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 ${pkgconfigdir}])
+
+# Make the *-config binary config scripts optional
+AC_ARG_WITH(binconfigs,
+	AC_HELP_STRING([--with-binconfigs],
+		[Generate shell libpng-config scripts as well as pkg-config data]
+		[@<:@default=yes@:>@]),
+	[if test "${withval}" = no; then
+		binconfigs=
+		AC_MSG_NOTICE([libpng-config scripts will not be built])
+	else
+		binconfigs='${binconfigs}'
+	fi],
+	[binconfigs='${binconfigs}'])
+AC_SUBST([binconfigs])
+
+# Allow the old version number library, libpng.so, to be removed from
+# the build
+AC_ARG_WITH(libpng-compat,
+	AC_HELP_STRING([--with-libpng-compat],
+		[Generate the obsolete libpng.so library @<:@default=yes@:>@]),
+	[if test "${withval}" = no; then
+		compatlib=
+		AC_MSG_NOTICE([libpng.so will not be built])
+	else
+		compatlib=libpng.la
+	fi],
+	[compatlib=libpng.la])
+AC_SUBST([compatlib])
+
+# Config files, substituting as above
+AC_CONFIG_FILES([Makefile libpng.pc:scripts/libpng.pc-configure.in])
+AC_CONFIG_FILES([libpng-config:scripts/libpng-config.in],
+		[chmod +x libpng-config])
 
-AC_CONFIG_FILES([Makefile])
 AC_OUTPUT

contrib/gregbook/COPYING

@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
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+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
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+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
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+distribute the same sections as part of a whole which is a work based
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+this License, whose permissions for other licensees extend to the
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+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
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+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
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+
+    b) Accompany it with a written offer, valid for at least three
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+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
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+
+If distribution of executable or object code is made by offering
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+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
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+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
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+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year  name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.

contrib/gregbook/LICENSE

@@ -1,12 +1,19 @@
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2008 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -23,4 +30,21 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------

contrib/gregbook/Makefile.mingw32

@@ -0,0 +1,130 @@
+# Sample makefile for rpng-win / rpng2-win / wpng using mingw32-gcc and make.
+# Greg Roelofs
+# Last modified:  2 June 2007
+#
+#	The programs built by this makefile are described in the book,
+#	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
+#	Associates, 1999).  Go buy a copy, eh?  Well, OK, it's not
+#	generally for sale anymore, but it's the thought that counts,
+#	right?  (Hint:  http://www.libpng.org/pub/png/book/ )
+#
+# Invoke this makefile from a DOS-prompt window via:
+#
+#	make -f Makefile.mingw32
+#
+# This makefile assumes libpng and zlib have already been built or downloaded
+# and are in subdirectories at the same level as the current subdirectory
+# (as indicated by the PNGDIR and ZDIR macros below).  It makes no assumptions
+# at all about the mingw32 installation tree (W32DIR).  Edit as appropriate.
+#
+# Note that the names of the dynamic and static libpng and zlib libraries
+# used below may change in later releases of the libraries.  This makefile
+# builds both statically and dynamically linked executables by default.
+# (You need only one set, but for testing it can be handy to have both.)
+
+
+# macros --------------------------------------------------------------------
+
+#PNGDIR = ../..#		for libpng-x.y.z/contrib/gregbook builds
+PNGDIR = ../libpng-win32
+PNGINC = -I$(PNGDIR)
+PNGLIBd = $(PNGDIR)/libpng.dll.a	# dynamically linked
+PNGLIBs = $(PNGDIR)/libpng.a		# statically linked, local libpng
+
+#ZDIR = ../../../zlib-win32#	for libpng-x.y.z/contrib/gregbook builds
+ZDIR = ../zlib-win32
+ZINC = -I$(ZDIR)
+ZLIBd = $(ZDIR)/libzdll.a
+ZLIBs = $(ZDIR)/libz.a
+
+# change this to be the path where mingw32 installs its stuff:
+W32DIR =
+#W32DIR = /usr/local/cross-tools/i386-mingw32msvc
+W32INC = -I$(W32DIR)/include
+W32LIB = $(W32DIR)/lib/libuser32.a $(W32DIR)/lib/libgdi32.a
+
+CC = gcc
+#CC = i386-mingw32msvc-gcc #	e.g., Linux -> Win32 cross-compilation
+LD = $(CC)
+RM = rm -f
+CFLAGS = -O -Wall $(INCS) $(MINGW_CCFLAGS)
+# [note that -Wall is a gcc-specific compilation flag ("most warnings on")]
+# [-ansi, -pedantic and -W can also be used]
+LDFLAGS = $(MINGW_LDFLAGS)
+O = .o
+E = .exe
+
+INCS = $(PNGINC) $(ZINC) $(W32INC)
+RLIBSd = $(PNGLIBd) $(ZLIBd) $(W32LIB) -lm
+RLIBSs = $(PNGLIBs) $(ZLIBs) $(W32LIB) -lm
+WLIBSd = $(PNGLIBd) $(ZLIBd)
+WLIBSs = $(PNGLIBs) $(ZLIBs)
+
+RPNG   = rpng-win
+RPNG2  = rpng2-win
+WPNG   = wpng
+
+ROBJSd  = $(RPNG)$(O) readpng.pic$(O)
+ROBJS2d = $(RPNG2)$(O) readpng2.pic$(O)
+WOBJSd  = $(WPNG)$(O) writepng.pic$(O)
+
+RPNGs  = $(RPNG)-static
+RPNG2s = $(RPNG2)-static
+WPNGs  = $(WPNG)-static
+
+ROBJSs  = $(RPNG)$(O) readpng$(O)
+ROBJS2s = $(RPNG2)$(O) readpng2$(O)
+WOBJSs  = $(WPNG)$(O) writepng$(O)
+
+STATIC_EXES  = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E)
+DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
+
+EXES = $(STATIC_EXES) $(DYNAMIC_EXES)
+
+
+# implicit make rules -------------------------------------------------------
+
+.c$(O):
+	$(CC) -c $(CFLAGS) $<
+
+%.pic$(O): %.c
+	$(CC) -c $(CFLAGS) -DPNG_BUILD_DLL -o $@ $<
+
+
+# dependencies --------------------------------------------------------------
+
+all:  $(EXES)
+
+$(RPNGs)$(E): $(ROBJSs)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJSs) $(RLIBSs)
+
+$(RPNG)$(E): $(ROBJSd)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJSd) $(RLIBSd)
+
+$(RPNG2s)$(E): $(ROBJS2s)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2s) $(RLIBSs)
+
+$(RPNG2)$(E): $(ROBJS2d)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2d) $(RLIBSd)
+
+$(WPNGs)$(E): $(WOBJSs)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJSs) $(WLIBSs)
+
+$(WPNG)$(E): $(WOBJSd)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJSd) $(WLIBSd)
+
+$(RPNG)$(O):	$(RPNG).c readpng.h
+$(RPNG2)$(O):	$(RPNG2).c readpng2.h
+$(WPNG)$(O):	$(WPNG).c writepng.h
+
+readpng$(O) readpng.pic$(O):	readpng.c readpng.h
+readpng2$(O) readpng2.pic$(O):	readpng2.c readpng2.h
+writepng$(O) writepng.pic$(O):	writepng.c writepng.h
+
+
+# maintenance ---------------------------------------------------------------
+
+clean:
+	$(RM) $(EXES)
+	$(RM) $(ROBJSs) $(ROBJS2s) $(WOBJSs)
+	$(RM) $(ROBJSd) $(ROBJS2d) $(WOBJSd)

contrib/gregbook/Makefile.unx

@@ -1,73 +1,92 @@
 # Sample makefile for rpng-x / rpng2-x / wpng using gcc and make.
 # Greg Roelofs
-# Last modified:  7 March 2002
+# Last modified:  2 June 2007
 #
 #	The programs built by this makefile are described in the book,
 #	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
-#	Associates, 1999).  Go buy a copy, eh?  Buy some for friends
-#	and family, too.  (Not that this is a blatant plug or anything.)
+#	Associates, 1999).  Go buy a copy, eh?  Well, OK, it's not
+#	generally for sale anymore, but it's the thought that counts,
+#	right?  (Hint:  http://www.libpng.org/pub/png/book/ )
 #
 # Invoke this makefile from a shell prompt in the usual way; for example:
 #
 #	make -f Makefile.unx
 #
 # This makefile assumes libpng and zlib have already been built or downloaded
-# and are both installed in /usr/local/{include,lib} (as indicated by the
-# PNG* and Z* macros below).  Edit as appropriate--choose only ONE each of
-# the PNGINC, PNGLIB, ZINC and ZLIB lines.
+# and are installed in /usr/local/{include,lib} or as otherwise indicated by
+# the PNG* and Z* macros below.  Edit as appropriate--choose only ONE each of
+# the PNGINC, PNGLIBd, PNGLIBs, ZINC, ZLIBd and ZLIBs lines.
 #
-# This makefile builds statically linked executables (against libpng and zlib,
-# that is), but that can be changed by uncommenting the appropriate PNGLIB and
-# ZLIB lines.
+# This makefile builds both dynamically and statically linked executables
+# (against libpng and zlib, that is), but that can be changed by modifying
+# the "EXES =" line.  (You need only one set, but for testing it can be handy
+# to have both.)
 
 
 # macros --------------------------------------------------------------------
 
-PNGINC = -I/usr/local/include/libpng12
-#PNGLIB = -L/usr/local/lib -lpng12 # dynamically linked against libpng
-PNGLIB = /usr/local/lib/libpng12.a # statically linked against libpng
+#PNGDIR = /usr/local/lib
+#PNGINC = -I/usr/local/include/libpng12
+#PNGLIBd = -L$(PNGDIR) -lpng12 # dynamically linked, installed libpng
+#PNGLIBs = $(PNGDIR)/libpng12.a # statically linked, installed libpng
 # or:
-#PNGINC = -I../libpng
-#PNGLIB = -L../libpng -lpng
-#PNGLIB = ../libpng/libpng.a
+PNGDIR = ../..#	this one is for libpng-x.y.z/contrib/gregbook builds
+#PNGDIR = ../libpng
+PNGINC = -I$(PNGDIR)
+PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng12	# dynamically linked
+PNGLIBs = $(PNGDIR)/libpng.a		# statically linked, local libpng
 
+ZDIR = /usr/local/lib
+#ZDIR = /usr/lib64
 ZINC = -I/usr/local/include
-#ZLIB = -L/usr/local/lib -lz		# dynamically linked against zlib
-ZLIB = /usr/local/lib/libz.a		# statically linked against zlib
-#ZINC = -I../zlib
-#ZLIB = -L../zlib -lz
-#ZLIB = ../zlib/libz.a
+ZLIBd = -L$(ZDIR) -lz			# dynamically linked against zlib
+ZLIBs = $(ZDIR)/libz.a			# statically linked against zlib
+# or:
+#ZDIR = ../zlib
+#ZINC = -I$(ZDIR)
+#ZLIBd = -Wl,-rpath,$(ZDIR) -L$(ZDIR) -lz  # -rpath allows in-place testing
+#ZLIBs = $(ZDIR)/libz.a
 
 #XINC = -I/usr/include			# old-style, stock X distributions
-#XLIB = -L/usr/lib/X11 -lX11
+#XLIB = -L/usr/lib/X11 -lX11		#  (including SGI IRIX)
 #XINC = -I/usr/openwin/include		# Sun workstations (OpenWindows)
 #XLIB = -L/usr/openwin/lib -lX11
-XINC = -I/usr/X11R6/include		# new X distributions (XFree86, etc.)
+XINC = -I/usr/X11R6/include		# new X distributions (X.org, etc.)
 XLIB = -L/usr/X11R6/lib -lX11
+#XLIB = -L/usr/X11R6/lib64 -lX11	# e.g., Red Hat on AMD64
 
 INCS = $(PNGINC) $(ZINC) $(XINC)
-RLIBS = $(PNGLIB) $(ZLIB) $(XLIB) -lm
-WLIBS = $(PNGLIB) $(ZLIB)
+RLIBSd = $(PNGLIBd) $(ZLIBd) $(XLIB) -lm
+RLIBSs = $(PNGLIBs) $(ZLIBs) $(XLIB) -lm
+WLIBSd = $(PNGLIBd) $(ZLIBd) -lm
+WLIBSs = $(PNGLIBs) $(ZLIBs)
 
 CC = gcc
 LD = gcc
 RM = rm -f
-CFLAGS = -O -Wall $(INCS)
+CFLAGS = -O -Wall $(INCS) -DFEATURE_LOOP
 # [note that -Wall is a gcc-specific compilation flag ("most warnings on")]
 # [-ansi, -pedantic and -W can also be used]
 LDFLAGS =
 O = .o
 E =
 
-RPNG  = rpng-x
-RPNG2 = rpng2-x
-WPNG  = wpng
+RPNG   = rpng-x
+RPNG2  = rpng2-x
+WPNG   = wpng
+
+RPNGs  = $(RPNG)-static
+RPNG2s = $(RPNG2)-static
+WPNGs  = $(WPNG)-static
 
 ROBJS  = $(RPNG)$(O) readpng$(O)
 ROBJS2 = $(RPNG2)$(O) readpng2$(O)
 WOBJS  = $(WPNG)$(O) writepng$(O)
 
-EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
+STATIC_EXES  = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E)
+DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
+
+EXES = $(STATIC_EXES) $(DYNAMIC_EXES)
 
 
 # implicit make rules -------------------------------------------------------
@@ -80,14 +99,23 @@ EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
 
 all:  $(EXES)
 
+$(RPNGs)$(E): $(ROBJS)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSs)
+
 $(RPNG)$(E): $(ROBJS)
-	$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBS)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSd)
+
+$(RPNG2s)$(E): $(ROBJS2)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSs)
 
 $(RPNG2)$(E): $(ROBJS2)
-	$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBS)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSd)
+
+$(WPNGs)$(E): $(WOBJS)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSs)
 
 $(WPNG)$(E): $(WOBJS)
-	$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBS)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSd)
 
 $(RPNG)$(O):	$(RPNG).c readpng.h
 $(RPNG2)$(O):	$(RPNG2).c readpng2.h

contrib/gregbook/Makefile.w32

@@ -1,11 +1,12 @@
 # Sample makefile for rpng-win / rpng2-win / wpng using MSVC and NMAKE.
 # Greg Roelofs
-# Last modified:  16 February 1999
+# Last modified:  2 June 2007
 #
 #	The programs built by this makefile are described in the book,
 #	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
-#	Associates, 1999).  Go buy a copy, eh?  Buy some for friends
-#	and family, too.  (Not that this is a blatant plug or anything.)
+#	Associates, 1999).  Go buy a copy, eh?  Well, OK, it's not
+#	generally for sale anymore, but it's the thought that counts,
+#	right?  (Hint:  http://www.libpng.org/pub/png/book/ )
 #
 # Invoke this makefile from a DOS prompt window via:
 #
@@ -53,7 +54,7 @@ CC = cl
 LD = link
 RM = del
 CFLAGS = -nologo -O -W3 $(INCS) $(cvars)
-# [note that -Wall is an MSVC-specific compilation flag ("all warnings on")]
+# [note that -W3 is an MSVC-specific compilation flag ("all warnings on")]
 # [see %devstudio%\vc\include\win32.mak for cvars macro definition]
 O = .obj
 E = .exe

contrib/gregbook/README

@@ -22,7 +22,8 @@ below.
 Files:
 
    README             this file
-   LICENSE            terms of distribution and reuse (BSD-like)
+   LICENSE            terms of distribution and reuse (BSD-like or GNU GPL)
+   COPYING            GNU General Public License (GPL)
 
    Makefile.unx       Unix makefile
    Makefile.w32       Windows (MSVC) makefile
@@ -54,15 +55,15 @@ mation and links to the latest version of the source code, and Chapters
 13-15 of the book for detailed discussion of the three programs.
 
 Greg Roelofs
-newt@pobox.com
-30 June 2001
+http://pobox.com/~newt/greg_contact.html
+16 March 2008
 
 
 BUILD INSTRUCTIONS
 
  - Prerequisites (in order of compilation):
 
-      - zlib		http://www.gzip.org/zlib/
+      - zlib		http://zlib.net/
       - libpng		http://www.libpng.org/pub/png/libpng.html
       - pngbook		http://www.libpng.org/pub/png/book/sources.html
 
@@ -150,9 +151,9 @@ BUILD INSTRUCTIONS
      To run the programs, they probably first need to be set up as "foreign
      symbols," with "disk" and "dir" set appropriately:
 
-     $ rpng == "$disk:[dir]rpng-x.exe"
+     $ rpng  == "$disk:[dir]rpng-x.exe"
      $ rpng2 == "$disk:[dir]rpng2-x.exe"
-     $ wpng == "$disk:[dir]wpng.exe"
+     $ wpng  == "$disk:[dir]wpng.exe"
 
      All three will print a basic usage screen when run without any command-
      line arguments; see the book for more details.  Note that the options
@@ -176,7 +177,7 @@ RUNNING THE PROGRAMS:  (VERY) BRIEF INTRO
      wpng is a purely command-line image converter from binary PBMPLUS/NetPBM
      format (.pgm or .ppm) to PNG; for example,
 
-	wpng -time < toucan.ppm > toucan.png
+	wpng -time < toucan-notrans.ppm > toucan-notrans.png
 
      would convert the specified PPM file (using redirection) to PNG, auto-
      matically setting the PNG modification-time chunk.

contrib/gregbook/readpng.c

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #include <stdio.h>

contrib/gregbook/readpng.h

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #ifndef TRUE

contrib/gregbook/readpng2.c

@@ -4,19 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-   Changelog:
-    - 1.01:  initial public release
-    - 1.02:  added code to skip unused chunks (GR-P)
-
-  ---------------------------------------------------------------------------
-
-      Copyright (c) 1998-2002 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -33,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 
@@ -56,7 +74,7 @@ static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg);
 void readpng2_version_info(void)
 {
 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && \
-    (defined(__i386__) || defined(_M_IX86)) && \
+    (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \
     defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
     /*
      * WARNING:  This preprocessor approach means that the following code
@@ -79,7 +97,12 @@ void readpng2_version_info(void)
               "with MMX support\n   (%s version).", PNG_LIBPNG_VER_STRING,
               png_libpng_ver, compilerID == 1? "MSVC++" :
               (compilerID == 2? "GNU C" : "unknown"));
-            fprintf(stderr, "  Processor %s MMX instructions.\n",
+            fprintf(stderr, "  Processor (x86%s) %s MMX instructions.\n",
+#if defined(__x86_64__)
+              "_64",
+#else
+              "",
+#endif
               mmxsupport? "supports" : "does not support");
             if (mmxsupport > 0) {
                 int num_optims = 0;
@@ -179,40 +202,38 @@ int readpng2_init(mainprog_info *mainprog_ptr)
         return 2;
     }
 
-    /* prepare the reader to ignore all recognized chunks whose data isn't
-     * going to be used, i.e., all chunks recognized by libpng except for
-     * IHDR, PLTE, IDAT, IEND, tRNS, bKGD, gAMA, and sRGB : */
 
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+    /* prepare the reader to ignore all recognized chunks whose data won't be
+     * used, i.e., all chunks recognized by libpng except for IHDR, PLTE, IDAT,
+     * IEND, tRNS, bKGD, gAMA, and sRGB (small performance improvement) */
     {
-#ifndef HANDLE_CHUNK_NEVER
-/* prior to libpng-1.2.5, this macro was internal, so we define it here. */
-# define HANDLE_CHUNK_NEVER 1
-#endif
-       /* these byte strings were copied from png.h.
-        * If a future libpng version recognizes more chunks, add them
-        * to this list.  If a future version of readpng2.c recognizes
-        * more chunks, delete them from this list. */
-       png_byte png_chunk_types_to_ignore[]=
-          { 99,  72,  82,  77, '\0', /* cHRM */
-           104,  73,  83,  84, '\0', /* hIST */
-           105,  67,  67,  80, '\0', /* iCCP */
-           105,  84,  88, 116, '\0', /* iTXt */
-           111,  70,  70, 115, '\0', /* oFFs */
-           112,  67,  65,  76, '\0', /* pCAL */
-           115,  67,  65,  76, '\0', /* sCAL */
-           112,  72,  89, 115, '\0', /* pHYs */
-           115,  66,  73,  84, '\0', /* sBIT */
-           115,  80,  76,  84, '\0', /* sPLT */
-           116,  69,  88, 116, '\0', /* tEXt */
-           116,  73,  77,  69, '\0', /* tIME */
-           122,  84,  88, 116, '\0'}; /* zTXt */
-#define NUM_PNG_CHUNK_TYPES_TO_IGNORE 13
+        /* These byte strings were copied from png.h.  If a future libpng
+         * version recognizes more chunks, add them to this list.  If a
+         * future version of readpng2.c recognizes more chunks, delete them
+         * from this list. */
+        static const png_byte chunks_to_ignore[] = {
+             99,  72,  82,  77, '\0',  /* cHRM */
+            104,  73,  83,  84, '\0',  /* hIST */
+            105,  67,  67,  80, '\0',  /* iCCP */
+            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,  66,  73,  84, '\0',  /* sBIT */
+            115,  67,  65,  76, '\0',  /* sCAL */
+            115,  80,  76,  84, '\0',  /* sPLT */
+            115,  84,  69,  82, '\0',  /* sTER */
+            116,  69,  88, 116, '\0',  /* tEXt */
+            116,  73,  77,  69, '\0',  /* tIME */
+            122,  84,  88, 116, '\0'   /* zTXt */
+        };
 
-    png_set_keep_unknown_chunks(png_ptr, HANDLE_CHUNK_NEVER,
-        png_chunk_types_to_ignore, NUM_PNG_CHUNK_TYPES_TO_IGNORE);
+        png_set_keep_unknown_chunks(png_ptr, 1 /* PNG_HANDLE_CHUNK_NEVER */,
+          chunks_to_ignore, sizeof(chunks_to_ignore)/5);
     }
-#endif
+#endif /* PNG_UNKNOWN_CHUNKS_SUPPORTED */
+
 
     /* instead of doing png_init_io() here, now we set up our callback
      * functions for progressive decoding */
@@ -237,7 +258,7 @@ int readpng2_init(mainprog_info *mainprog_ptr)
      *                  png_set_asm_flags (png_ptr, flags);
      */
 
-#if (defined(__i386__) || defined(_M_IX86)) && \
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \
     defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
     /*
      * WARNING:  This preprocessor approach means that the following code

contrib/gregbook/readpng2.h

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2008 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #ifndef TRUE
@@ -45,6 +69,12 @@
 #  define Trace(x)  ;
 #endif
 
+enum rpng2_states {
+    kPreInit = 0,
+    kWindowInit,
+    kDone
+};
+
 typedef unsigned char   uch;
 typedef unsigned short  ush;
 typedef unsigned long   ulg;
@@ -66,12 +96,12 @@ typedef struct _mainprog_info {
     int rowbytes;
     int channels;
     int need_bgcolor;
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
     int nommxfilters;
     int nommxcombine;
     int nommxinterlace;
 #endif
-    int done;
+    int state;
     uch bg_red;
     uch bg_green;
     uch bg_blue;

contrib/gregbook/readppm.c

@@ -0,0 +1,179 @@
+/*---------------------------------------------------------------------------
+
+   rpng - simple PNG display program                              readppm.c
+
+  ---------------------------------------------------------------------------
+
+   This is a special-purpose replacement for readpng.c that allows binary
+   PPM files to be used in place of PNG images.
+
+  ---------------------------------------------------------------------------
+
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
+
+      This software is provided "as is," without warranty of any kind,
+      express or implied.  In no event shall the author or contributors
+      be held liable for any damages arising in any way from the use of
+      this software.
+
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
+      Permission is granted to anyone to use this software for any purpose,
+      including commercial applications, and to alter it and redistribute
+      it freely, subject to the following restrictions:
+
+      1. Redistributions of source code must retain the above copyright
+         notice, disclaimer, and this list of conditions.
+      2. Redistributions in binary form must reproduce the above copyright
+         notice, disclaimer, and this list of conditions in the documenta-
+         tion and/or other materials provided with the distribution.
+      3. All advertising materials mentioning features or use of this
+         software must display the following acknowledgment:
+
+            This product includes software developed by Greg Roelofs
+            and contributors for the book, "PNG: The Definitive Guide,"
+            published by O'Reilly and Associates.
+
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+  ---------------------------------------------------------------------------*/
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "readpng.h"    /* typedefs, common macros, public prototypes */
+
+
+ulg  width, height;
+int  bit_depth, color_type, channels;
+uch  *image_data = NULL;
+FILE *saved_infile;
+
+
+void readpng_version_info()
+{
+    fprintf(stderr, "   Compiled without libpng, zlib or PBMPLUS/NetPBM.\n");
+}
+
+
+/* return value = 0 for success, 1 for bad sig, 2 for bad IHDR, 4 for no mem */
+
+int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight)
+{
+    static uch ppmline[256];
+    int maxval;
+
+
+    saved_infile = infile;
+
+    fgets(ppmline, 256, infile);
+    if (ppmline[0] != 'P' || ppmline[1] != '6') {
+        fprintf(stderr, "ERROR:  not a PPM file\n");
+        return 1;
+    }
+    /* possible color types:  P5 = grayscale (0), P6 = RGB (2), P8 = RGBA (6) */
+    if (ppmline[1] == '6') {
+        color_type = 2;
+        channels = 3;
+    } else if (ppmline[1] == '8') {
+        color_type = 6;
+        channels = 4;
+    } else /* if (ppmline[1] == '5') */ {
+        color_type = 0;
+        channels = 1;
+    }
+
+    do {
+        fgets(ppmline, 256, infile);
+    } while (ppmline[0] == '#');
+    sscanf(ppmline, "%lu %lu", &width, &height);
+
+    do {
+        fgets(ppmline, 256, infile);
+    } while (ppmline[0] == '#');
+    sscanf(ppmline, "%d", &maxval);
+    if (maxval != 255) {
+        fprintf(stderr, "ERROR:  maxval = %d\n", maxval);
+        return 2;
+    }
+    bit_depth = 8;
+
+    *pWidth = width;
+    *pHeight = height;
+
+    return 0;
+}
+
+
+
+
+/* returns 0 if succeeds, 1 if fails due to no bKGD chunk, 2 if libpng error;
+ * scales values to 8-bit if necessary */
+
+int readpng_get_bgcolor(uch *red, uch *green, uch *blue)
+{
+    return 1;
+}
+
+
+
+
+/* display_exponent == LUT_exponent * CRT_exponent */
+
+uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes)
+{
+    ulg  rowbytes;
+
+
+    /* expand palette images to RGB, low-bit-depth grayscale images to 8 bits,
+     * transparency chunks to full alpha channel; strip 16-bit-per-sample
+     * images to 8 bits per sample; and convert grayscale to RGB[A] */
+
+    /* GRR WARNING:  grayscale needs to be expanded and channels reset! */
+
+    *pRowbytes = rowbytes = channels*width;
+    *pChannels = channels;
+
+    if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) {
+        return NULL;
+    }
+
+    Trace((stderr, "readpng_get_image:  rowbytes = %ld, height = %ld\n", rowbytes, height));
+
+
+    /* now we can go ahead and just read the whole image */
+
+    fread(image_data, 1L, rowbytes*height, saved_infile);
+
+
+    return image_data;
+}
+
+
+void readpng_cleanup(int free_image_data)
+{
+    if (free_image_data && image_data) {
+        free(image_data);
+        image_data = NULL;
+    }
+}

contrib/gregbook/rpng-win.c

@@ -22,16 +22,25 @@
     - 1.02:  added extra set of parentheses to png_jmpbuf() macro; fixed
               command-line parsing bug
     - 1.10:  enabled "message window"/console (thanks to David Geldreich)
+    - 2.00:  dual-licensed (added GNU GPL)
+    - 2.01:  fixed improper display of usage screen on PNG error(s)
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2008 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -48,11 +57,28 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "rpng-win"
 #define LONGNAME  "Simple PNG Viewer for Windows"
-#define VERSION   "1.20 of 28 May 2001"
+#define VERSION   "2.01 of 16 March 2008"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -85,10 +111,9 @@ static void       rpng_win_cleanup(void);
 LRESULT CALLBACK  rpng_win_wndproc(HWND, UINT, WPARAM, LPARAM);
 
 
-static char titlebar[1024], *window_name = titlebar;
+static char titlebar[1024];
 static char *progname = PROGNAME;
 static char *appname = LONGNAME;
-static char *icon_name = PROGNAME;     /* GRR:  not (yet) used */
 static char *filename;
 static FILE *infile;
 
@@ -247,40 +272,11 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
         }
     }
 
-    if (!filename) {
+    if (!filename)
         ++error;
-    } else if (!(infile = fopen(filename, "rb"))) {
-        fprintf(stderr, PROGNAME ":  can't open PNG file [%s]\n", filename);
-        ++error;
-    } else {
-        if ((rc = readpng_init(infile, &image_width, &image_height)) != 0) {
-            switch (rc) {
-                case 1:
-                    fprintf(stderr, PROGNAME
-                      ":  [%s] is not a PNG file: incorrect signature\n",
-                      filename);
-                    break;
-                case 2:
-                    fprintf(stderr, PROGNAME
-                      ":  [%s] has bad IHDR (libpng longjmp)\n",
-                      filename);
-                    break;
-                case 4:
-                    fprintf(stderr, PROGNAME ":  insufficient memory\n");
-                    break;
-                default:
-                    fprintf(stderr, PROGNAME
-                      ":  unknown readpng_init() error\n");
-                    break;
-            }
-            ++error;
-        }
-        if (error)
-            fclose(infile);
-    }
 
 
-    /* usage screen */
+    /* print usage screen if any errors up to this point */
 
     if (error) {
         int ch;
@@ -303,6 +299,47 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
             ch = _getch();
         while (ch != 'q' && ch != 'Q' && ch != 0x1B);
         exit(1);
+    }
+
+
+    if (!(infile = fopen(filename, "rb"))) {
+        fprintf(stderr, PROGNAME ":  can't open PNG file [%s]\n", filename);
+        ++error;
+    } else {
+        if ((rc = readpng_init(infile, &image_width, &image_height)) != 0) {
+            switch (rc) {
+                case 1:
+                    fprintf(stderr, PROGNAME
+                      ":  [%s] is not a PNG file: incorrect signature\n",
+                      filename);
+                    break;
+                case 2:
+                    fprintf(stderr, PROGNAME
+                      ":  [%s] has bad IHDR (libpng longjmp)\n", filename);
+                    break;
+                case 4:
+                    fprintf(stderr, PROGNAME ":  insufficient memory\n");
+                    break;
+                default:
+                    fprintf(stderr, PROGNAME
+                      ":  unknown readpng_init() error\n");
+                    break;
+            }
+            ++error;
+        }
+        if (error)
+            fclose(infile);
+    }
+
+
+    if (error) {
+        int ch;
+
+        fprintf(stderr, PROGNAME ":  aborting.\n");
+        do
+            ch = _getch();
+        while (ch != 'q' && ch != 'Q' && ch != 0x1B);
+        exit(2);
     } else {
         fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
         fprintf(stderr,
@@ -325,9 +362,14 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
      * check for one in the PNG file--if not, the initialized values of 0
      * (black) will be used */
 
-    if (have_bg)
-        sscanf(bgstr+1, "%2x%2x%2x", &bg_red, &bg_green, &bg_blue);
-    else if (readpng_get_bgcolor(&bg_red, &bg_green, &bg_blue) > 1) {
+    if (have_bg) {
+        unsigned r, g, b;   /* this approach quiets compiler warnings */
+
+        sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b);
+        bg_red   = (uch)r;
+        bg_green = (uch)g;
+        bg_blue  = (uch)b;
+    } else if (readpng_get_bgcolor(&bg_red, &bg_green, &bg_blue) > 1) {
         readpng_cleanup(TRUE);
         fprintf(stderr, PROGNAME
           ":  libpng error while checking for background color\n");

contrib/gregbook/rpng-x.c

@@ -9,7 +9,7 @@
    by Martin Zinser under OpenVMS; may work under OS/2 with some tweaking).
 
    to do:
-    - 8-bit support
+    - 8-bit (colormapped) X support
     - use %.1023s to simplify truncation of title-bar string?
 
   ---------------------------------------------------------------------------
@@ -21,18 +21,28 @@
     - 1.10:  added support for non-default visuals; fixed X pixel-conversion
     - 1.11:  added extra set of parentheses to png_jmpbuf() macro; fixed
               command-line parsing bug
-    - 1.12:  fixed small X memory leak (thanks to Francois Petitjean)
-    - 1.13:  fixed XFreeGC() crash bug
+    - 1.12:  fixed some small X memory leaks (thanks to Fran<EFBFBD>ois Petitjean)
+    - 1.13:  fixed XFreeGC() crash bug (thanks to Patrick Welche)
+    - 1.14:  added support for X resources (thanks to Gerhard Niklasch)
+    - 2.00:  dual-licensed (added GNU GPL)
+    - 2.01:  fixed improper display of usage screen on PNG error(s)
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2008 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -49,11 +59,30 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "rpng-x"
 #define LONGNAME  "Simple PNG Viewer for X"
-#define VERSION   "1.13 of 16 August 2001"
+#define VERSION   "2.01 of 16 March 2008"
+#define RESNAME   "rpng"	/* our X resource application name */
+#define RESCLASS  "Rpng"	/* our X resource class name */
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -91,6 +120,8 @@ static int  rpng_x_msb(ulg u32val);
 static char titlebar[1024], *window_name = titlebar;
 static char *appname = LONGNAME;
 static char *icon_name = PROGNAME;
+static char *res_name = RESNAME;
+static char *res_class = RESCLASS;
 static char *filename;
 static FILE *infile;
 
@@ -235,9 +266,33 @@ int main(int argc, char **argv)
         }
     }
 
-    if (!filename) {
+    if (!filename)
         ++error;
-    } else if (!(infile = fopen(filename, "rb"))) {
+
+
+    /* print usage screen if any errors up to this point */
+
+    if (error) {
+        fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
+        readpng_version_info();
+        fprintf(stderr, "\n"
+          "Usage:  %s [-display xdpy] [-gamma exp] [-bgcolor bg] file.png\n"
+          "    xdpy\tname of the target X display (e.g., ``hostname:0'')\n"
+          "    exp \ttransfer-function exponent (``gamma'') of the display\n"
+          "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
+          "\t\t  to the product of the lookup-table exponent (varies)\n"
+          "\t\t  and the CRT exponent (usually 2.2); must be positive\n"
+          "    bg  \tdesired background color in 7-character hex RGB format\n"
+          "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
+          "\t\t  used with transparent images\n"
+          "\nPress Q, Esc or mouse button 1 (within image window, after image\n"
+          "is displayed) to quit.\n"
+          "\n", PROGNAME, default_display_exponent);
+        exit(1);
+    }
+
+
+    if (!(infile = fopen(filename, "rb"))) {
         fprintf(stderr, PROGNAME ":  can't open PNG file [%s]\n", filename);
         ++error;
     } else {
@@ -250,8 +305,7 @@ int main(int argc, char **argv)
                     break;
                 case 2:
                     fprintf(stderr, PROGNAME
-                      ":  [%s] has bad IHDR (libpng longjmp)\n",
-                      filename);
+                      ":  [%s] has bad IHDR (libpng longjmp)\n", filename);
                     break;
                 case 4:
                     fprintf(stderr, PROGNAME ":  insufficient memory\n");
@@ -276,25 +330,9 @@ int main(int argc, char **argv)
     }
 
 
-    /* usage screen */
-
     if (error) {
-        fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
-        readpng_version_info();
-        fprintf(stderr, "\n"
-          "Usage:  %s [-display xdpy] [-gamma exp] [-bgcolor bg] file.png\n"
-          "    xdpy\tname of the target X display (e.g., ``hostname:0'')\n"
-          "    exp \ttransfer-function exponent (``gamma'') of the display\n"
-          "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
-          "\t\t  to the product of the lookup-table exponent (varies)\n"
-          "\t\t  and the CRT exponent (usually 2.2); must be positive\n"
-          "    bg  \tdesired background color in 7-character hex RGB format\n"
-          "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
-          "\t\t  used with transparent images\n"
-          "\nPress Q, Esc or mouse button 1 (within image window, after image\n"
-          "is displayed) to quit.\n"
-          "\n", PROGNAME, default_display_exponent);
-        exit(1);
+        fprintf(stderr, PROGNAME ":  aborting.\n");
+        exit(2);
     }
 
 
@@ -399,11 +437,12 @@ static int rpng_x_create_window(void)
     XEvent e;
     XGCValues gcvalues;
     XSetWindowAttributes attr;
-    XSizeHints *size_hints;
     XTextProperty windowName, *pWindowName = &windowName;
     XTextProperty iconName, *pIconName = &iconName;
     XVisualInfo visual_info;
+    XSizeHints *size_hints;
     XWMHints *wm_hints;
+    XClassHint *class_hints;
 
 
     screen = DefaultScreen(display);
@@ -526,7 +565,7 @@ static int rpng_x_create_window(void)
     if (!XStringListToTextProperty(&icon_name, 1, pIconName))
         pIconName = NULL;
 
-    /* OK if either hints allocation fails; XSetWMProperties() allows NULLs */
+    /* OK if any hints allocation fails; XSetWMProperties() allows NULLs */
 
     if ((size_hints = XAllocSizeHints()) != NULL) {
         /* window will not be resizable */
@@ -542,8 +581,13 @@ static int rpng_x_create_window(void)
         wm_hints->flags = StateHint | InputHint  /* | IconPixmapHint */ ;
     }
 
+    if ((class_hints = XAllocClassHint()) != NULL) {
+        class_hints->res_name = res_name;
+        class_hints->res_class = res_class;
+    }
+
     XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0,
-      size_hints, wm_hints, NULL);
+      size_hints, wm_hints, class_hints);
 
     /* various properties and hints no longer needed; free memory */
     if (pWindowName)
@@ -554,6 +598,8 @@ static int rpng_x_create_window(void)
         XFree(size_hints);
     if (wm_hints)
        XFree(wm_hints);
+    if (class_hints)
+       XFree(class_hints);
 
     XMapWindow(display, window);
 

contrib/gregbook/rpng2-win.c

@@ -10,7 +10,7 @@
    tweaking (or maybe not).  Thanks to Adam Costello and Pieter S. van der
    Meulen for the "diamond" and "radial waves" patterns, respectively.
 
-   to do:
+   to do (someday, maybe):
     - handle quoted command-line args (especially filenames with spaces)
     - finish resizable checkerboard-gradient (sizes 4-128?)
     - use %.1023s to simplify truncation of title-bar string?
@@ -27,16 +27,28 @@
     - 1.10:  enabled "message window"/console (thanks to David Geldreich)
     - 1.20:  added runtime MMX-enabling/disabling and new -mmx* options
     - 1.21:  made minor tweak to usage screen to fit within 25-line console
+    - 1.22:  added AMD64/EM64T support (__x86_64__)
+    - 2.00:  dual-licensed (added GNU GPL)
+    - 2.01:  fixed 64-bit typo in readpng2.c
+    - 2.02:  fixed improper display of usage screen on PNG error(s); fixed
+              unexpected-EOF and file-read-error cases
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2008 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -53,11 +65,28 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "rpng2-win"
 #define LONGNAME  "Progressive PNG Viewer for Windows"
-#define VERSION   "1.21 of 29 June 2001"
+#define VERSION   "2.02 of 16 March 2008"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -119,10 +148,9 @@ static void       rpng2_win_cleanup(void);
 LRESULT CALLBACK  rpng2_win_wndproc(HWND, UINT, WPARAM, LPARAM);
 
 
-static char titlebar[1024], *window_name = titlebar;
+static char titlebar[1024];
 static char *progname = PROGNAME;
 static char *appname = LONGNAME;
-static char *icon_name = PROGNAME;    /* GRR:  not (yet) used */
 static char *filename;
 static FILE *infile;
 
@@ -367,7 +395,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
             }
         } else if (!strncmp(*argv, "-timing", 2)) {
             timing = TRUE;
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
         } else if (!strncmp(*argv, "-nommxfilters", 7)) {
             rpng2_info.nommxfilters = TRUE;
         } else if (!strncmp(*argv, "-nommxcombine", 7)) {
@@ -389,9 +417,54 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
         }
     }
 
-    if (!filename) {
+    if (!filename)
         ++error;
-    } else if (!(infile = fopen(filename, "rb"))) {
+
+
+    /* print usage screen if any errors up to this point */
+
+    if (error) {
+        int ch;
+
+        fprintf(stderr, "\n%s %s:  %s\n\n", PROGNAME, VERSION, appname);
+        readpng2_version_info();
+        fprintf(stderr, "\n"
+          "Usage:  %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n"
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+          "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
+#endif
+          "        %*s file.png\n\n"
+          "    exp \ttransfer-function exponent (``gamma'') of the display\n"
+          "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
+          "\t\t  to the product of the lookup-table exponent (varies)\n"
+          "\t\t  and the CRT exponent (usually 2.2); must be positive\n"
+          "    bg  \tdesired background color in 7-character hex RGB format\n"
+          "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
+          "\t\t  used with transparent images; overrides -bgpat option\n"
+          "    pat \tdesired background pattern number (1-%d); used with\n"
+          "\t\t  transparent images; overrides -bgcolor option\n"
+          "    -timing\tenables delay for every block read, to simulate modem\n"
+          "\t\t  download of image (~36 Kbps)\n"
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+          "    -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
+          "\t\t  combining rows, and expanding interlacing, respectively\n"
+#endif
+          "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
+          "Press Q or Esc to quit this usage screen. ",
+          PROGNAME,
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+          (int)strlen(PROGNAME), " ",
+#endif
+          (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
+        fflush(stderr);
+        do
+            ch = _getch();
+        while (ch != 'q' && ch != 'Q' && ch != 0x1B);
+        exit(1);
+    }
+
+
+    if (!(infile = fopen(filename, "rb"))) {
         fprintf(stderr, PROGNAME ":  can't open PNG file [%s]\n", filename);
         ++error;
     } else {
@@ -405,8 +478,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
             switch (rc) {
                 case 2:
                     fprintf(stderr, PROGNAME
-                      ":  [%s] has bad IHDR (libpng longjmp)\n",
-                      filename);
+                      ":  [%s] has bad IHDR (libpng longjmp)\n", filename);
                     break;
                 case 4:
                     fprintf(stderr, PROGNAME ":  insufficient memory\n");
@@ -423,46 +495,14 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     }
 
 
-    /* usage screen */
-
     if (error) {
         int ch;
 
-        fprintf(stderr, "\n%s %s:  %s\n\n", PROGNAME, VERSION, appname);
-        readpng2_version_info();
-        fprintf(stderr, "\n"
-          "Usage:  %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n"
-#if (defined(__i386__) || defined(_M_IX86))
-          "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
-#endif
-          "        %*s file.png\n\n"
-          "    exp \ttransfer-function exponent (``gamma'') of the display\n"
-          "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
-          "\t\t  to the product of the lookup-table exponent (varies)\n"
-          "\t\t  and the CRT exponent (usually 2.2); must be positive\n"
-          "    bg  \tdesired background color in 7-character hex RGB format\n"
-          "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
-          "\t\t  used with transparent images; overrides -bgpat option\n"
-          "    pat \tdesired background pattern number (1-%d); used with\n"
-          "\t\t  transparent images; overrides -bgcolor option\n"
-          "    -timing\tenables delay for every block read, to simulate modem\n"
-          "\t\t  download of image (~36 Kbps)\n"
-#if (defined(__i386__) || defined(_M_IX86))
-          "    -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
-          "\t\t  combining rows, and expanding interlacing, respectively\n"
-#endif
-          "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
-          "Press Q or Esc to quit this usage screen. ",
-          PROGNAME,
-#if (defined(__i386__) || defined(_M_IX86))
-          strlen(PROGNAME), " ",
-#endif
-          strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
-        fflush(stderr);
+        fprintf(stderr, PROGNAME ":  aborting.\n");
         do
             ch = _getch();
         while (ch != 'q' && ch != 'Q' && ch != 0x1B);
-        exit(1);
+        exit(2);
     } else {
         fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
         fprintf(stderr,
@@ -494,7 +534,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     } else
         rpng2_info.need_bgcolor = TRUE;
 
-    rpng2_info.done = FALSE;
+    rpng2_info.state = kPreInit;
     rpng2_info.mainprog_init = rpng2_win_init;
     rpng2_info.mainprog_display_row = rpng2_win_display_row;
     rpng2_info.mainprog_finish_display = rpng2_win_finish_display;
@@ -514,10 +554,27 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
         if (readpng2_decode_data(&rpng2_info, inbuf, incount))
             ++error;
         Trace((stderr, "done with readpng2_decode_data()\n"))
-        if (error || feof(infile) || rpng2_info.done)
+
+        if (error || incount != INBUFSIZE || rpng2_info.state == kDone) {
+            if (rpng2_info.state == kDone) {
+                Trace((stderr, "done decoding PNG image\n"))
+            } else if (ferror(infile)) {
+                fprintf(stderr, PROGNAME
+                  ":  error while reading PNG image file\n");
+                exit(3);
+            } else if (feof(infile)) {
+                fprintf(stderr, PROGNAME ":  end of file reached "
+                  "(unexpectedly) while reading PNG image file\n");
+                exit(3);
+            } else /* if (error) */ {
+                // will print error message below
+            }
             break;
+        }
+
         if (timing)
             Sleep(1000L);
+
         incount = fread(inbuf, 1, INBUFSIZE, infile);
     }
 
@@ -564,7 +621,7 @@ static void rpng2_win_init()
     ulg rowbytes = rpng2_info.rowbytes;
 
     Trace((stderr, "beginning rpng2_win_init()\n"))
-    Trace((stderr, "  rowbytes = %ld\n", rpng2_info.rowbytes))
+    Trace((stderr, "  rowbytes = %d\n", rpng2_info.rowbytes))
     Trace((stderr, "  width  = %ld\n", rpng2_info.width))
     Trace((stderr, "  height = %ld\n", rpng2_info.height))
 
@@ -594,6 +651,8 @@ static void rpng2_win_init()
         readpng2_cleanup(&rpng2_info);
         return;
     }
+
+    rpng2_info.state = kWindowInit;
 }
 
 
@@ -1089,7 +1148,7 @@ static void rpng2_win_finish_display()
      * we have nothing to do here except set a flag and let the user know
      * that the image is done */
 
-    rpng2_info.done = TRUE;
+    rpng2_info.state = kDone;
     printf(
       "Done.  Press Q, Esc or mouse button 1 (within image window) to quit.\n");
     fflush(stdout);

contrib/gregbook/wpng.c

@@ -5,8 +5,10 @@
    This program converts certain NetPBM binary files (grayscale and RGB,
    maxval = 255) to PNG.  Non-interlaced PNGs are written progressively;
    interlaced PNGs are read and written in one memory-intensive blast.
+
    Thanks to Jean-loup Gailly for providing the necessary trick to read
-   interactive text from the keyboard while stdin is redirected.
+   interactive text from the keyboard while stdin is redirected.  Thanks
+   to Cosmin Truta for Cygwin fixes.
 
    NOTE:  includes provisional support for PNM type "8" (portable alphamap)
           images, presumed to be a 32-bit interleaved RGBA format; no pro-
@@ -24,16 +26,32 @@
     - 1.02:  modified to allow abbreviated options
     - 1.03:  removed extraneous character from usage screen; fixed bug in
               command-line parsing
+    - 1.04:  fixed DOS/OS2/Win32 detection, including partial Cygwin fix
+              (see http://home.att.net/~perlspinr/diffs/GregBook_cygwin.diff)
+    - 2.00:  dual-licensed (added GNU GPL)
+
+        [REPORTED BUG (win32 only):  "contrib/gregbook/wpng.c - cmd line
+         dose not work!  In order to do something useful I needed to redirect
+         both input and output, with cygwin and with bcc32 as well.  Under
+         Linux, the same wpng appears to work fine.  I don't know what is
+         the problem."]
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -50,16 +68,35 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "wpng"
-#define VERSION   "1.03 of 19 March 2000"
+#define VERSION   "2.00 of 2 June 2007"
 #define APPNAME   "Simple PGM/PPM/PAM to PNG Converter"
 
 #if defined(__MSDOS__) || defined(__OS2__)
 #  define DOS_OS2_W32
-#elif defined(_WIN32) || defined(__WIN32__)
-#  define DOS_OS2_W32
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
+#  ifndef __GNUC__   /* treat Win32 native ports of gcc as Unix environments */
+#    define DOS_OS2_W32
+#  endif
 #endif
 
 #include <stdio.h>

contrib/gregbook/writepng.c

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 

contrib/gregbook/writepng.h

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      This program 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.
+
+      This program 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 this program; if not, write to the Free Software Foundation,
+      Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #ifndef TRUE

contrib/pngminus/README

@@ -20,7 +20,7 @@ Soon after the creation of PNG in 1995, the need was felt for a set of
 pnmtopng / pngtopnm utilities. Independantly Alexander Lehmann and I
 (Willem van Schaik) started such a project. Luckily we discovered this
 and merged the two together into pnmtopng.tar.gz, which is available
-from a/o ftp://swrinde.nde.swri.edu/pub/png/.
+from a/o ftp://ftp.simplesystems.org/pub/libpng/png/.
 
 These two utilities have many, many options and make use of most of the
 features of PNG, like gamma, alpha, sbit, text-chunks, etc. This makes

contrib/pngminus/png2pnm.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 # -- grayscale
 ./png2pnm -noraw ../pngsuite/basn0g01.png basn0g01.pgm
 ./png2pnm -noraw ../pngsuite/basn0g02.png basn0g02.pgm

contrib/pngminus/pngminus.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 make -f makefile.std
 sh png2pnm.sh
 sh pnm2png.sh

contrib/pngminus/pnm2png.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 # -- grayscale
 ./pnm2png basn0g01.pgm basn0g01.png
 ./pnm2png basn0g02.pgm basn0g02.png

contrib/visupng/VisualPng.rc

@@ -1,152 +1,152 @@
-//Microsoft Developer Studio generated resource script.
-//
-#include "resource.h"
-
-#define APSTUDIO_READONLY_SYMBOLS
-/////////////////////////////////////////////////////////////////////////////
-//
-// Generated from the TEXTINCLUDE 2 resource.
-//
-#include "afxres.h"
-
-/////////////////////////////////////////////////////////////////////////////
-#undef APSTUDIO_READONLY_SYMBOLS
-
-/////////////////////////////////////////////////////////////////////////////
-// English (U.S.) resources
-
-#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
-#ifdef _WIN32
-LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
-#pragma code_page(1252)
-#endif //_WIN32
-
-#ifdef APSTUDIO_INVOKED
-/////////////////////////////////////////////////////////////////////////////
-//
-// TEXTINCLUDE
-//
-
-1 TEXTINCLUDE DISCARDABLE 
-BEGIN
-    "resource.h\0"
-END
-
-2 TEXTINCLUDE DISCARDABLE 
-BEGIN
-    "#include ""afxres.h""\r\n"
-    "\0"
-END
-
-3 TEXTINCLUDE DISCARDABLE 
-BEGIN
-    "\r\n"
-    "\0"
-END
-
-#endif    // APSTUDIO_INVOKED
-
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Menu
-//
-
-VISUALPNG MENU DISCARDABLE 
-BEGIN
-    POPUP "&File"
-    BEGIN
-        MENUITEM "&Open Image...\tCtrl+O",      IDM_FILE_OPEN
-        MENUITEM "Save &As...",                 IDM_FILE_SAVE
-        MENUITEM SEPARATOR
-        MENUITEM "&Next Image\tCtrl+N",         IDM_FILE_NEXT
-        MENUITEM "Pre&vious Image\tCtrl+V",     IDM_FILE_PREVIOUS
-        MENUITEM SEPARATOR
-        MENUITEM "E&xit\tAlt+X",                IDM_FILE_EXIT
-    END
-    POPUP "&Options"
-    BEGIN
-        MENUITEM "&Stretch",                    IDM_OPTIONS_STRETCH, CHECKED
-    END
-    POPUP "&Help"
-    BEGIN
-        MENUITEM "&About",                      IDM_HELP_ABOUT
-    END
-END
-
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Accelerator
-//
-
-VISUALPNG ACCELERATORS DISCARDABLE 
-BEGIN
-    "N",            IDM_FILE_NEXT,          VIRTKEY, CONTROL, NOINVERT
-    "O",            IDM_FILE_OPEN,          VIRTKEY, CONTROL, NOINVERT
-    "P",            IDM_FILE_PREVIOUS,      VIRTKEY, CONTROL, NOINVERT
-    "V",            IDM_FILE_PREVIOUS,      VIRTKEY, CONTROL, NOINVERT
-    "X",            IDM_FILE_EXIT,          VIRTKEY, ALT, NOINVERT
-END
-
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Icon
-//
-
-// Icon with lowest ID value placed first to ensure application icon
-// remains consistent on all systems.
-VISUALPNG               ICON    DISCARDABLE     "VisualPng.ico"
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Dialog
-//
-
-ABOUTBOX DIALOG DISCARDABLE  0, 0, 186, 94
-STYLE DS_MODALFRAME | WS_POPUP
-FONT 8, "MS Sans Serif"
-BEGIN
-    DEFPUSHBUTTON   "OK",IDOK,68,67,50,14
-    CTEXT           "VisualPng 1.0  -  June 2000",IDC_STATIC,49,14,88,8
-    LTEXT           "a PNG image viewer",IDC_STATIC,60,30,66,8
-    LTEXT           "(c) Willem van Schaik, 2000",IDC_STATIC,48,52,90,8
-    LTEXT           "to demonstrate the use of libpng in Visual C",
-                    IDC_STATIC,25,38,136,8
-END
-
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// DESIGNINFO
-//
-
-#ifdef APSTUDIO_INVOKED
-GUIDELINES DESIGNINFO DISCARDABLE 
-BEGIN
-    "ABOUTBOX", DIALOG
-    BEGIN
-        LEFTMARGIN, 7
-        RIGHTMARGIN, 179
-        TOPMARGIN, 7
-        BOTTOMMARGIN, 87
-    END
-END
-#endif    // APSTUDIO_INVOKED
-
-#endif    // English (U.S.) resources
-/////////////////////////////////////////////////////////////////////////////
-
-
-
-#ifndef APSTUDIO_INVOKED
-/////////////////////////////////////////////////////////////////////////////
-//
-// Generated from the TEXTINCLUDE 3 resource.
-//
-
-
-/////////////////////////////////////////////////////////////////////////////
-#endif    // not APSTUDIO_INVOKED
-
+//Microsoft Developer Studio generated resource script.
+//
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "afxres.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (U.S.) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+#ifdef _WIN32
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+#pragma code_page(1252)
+#endif //_WIN32
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE DISCARDABLE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE DISCARDABLE 
+BEGIN
+    "#include ""afxres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE DISCARDABLE 
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Menu
+//
+
+VISUALPNG MENU DISCARDABLE 
+BEGIN
+    POPUP "&File"
+    BEGIN
+        MENUITEM "&Open Image...\tCtrl+O",      IDM_FILE_OPEN
+        MENUITEM "Save &As...",                 IDM_FILE_SAVE
+        MENUITEM SEPARATOR
+        MENUITEM "&Next Image\tCtrl+N",         IDM_FILE_NEXT
+        MENUITEM "Pre&vious Image\tCtrl+V",     IDM_FILE_PREVIOUS
+        MENUITEM SEPARATOR
+        MENUITEM "E&xit\tAlt+X",                IDM_FILE_EXIT
+    END
+    POPUP "&Options"
+    BEGIN
+        MENUITEM "&Stretch",                    IDM_OPTIONS_STRETCH, CHECKED
+    END
+    POPUP "&Help"
+    BEGIN
+        MENUITEM "&About",                      IDM_HELP_ABOUT
+    END
+END
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Accelerator
+//
+
+VISUALPNG ACCELERATORS DISCARDABLE 
+BEGIN
+    "N",            IDM_FILE_NEXT,          VIRTKEY, CONTROL, NOINVERT
+    "O",            IDM_FILE_OPEN,          VIRTKEY, CONTROL, NOINVERT
+    "P",            IDM_FILE_PREVIOUS,      VIRTKEY, CONTROL, NOINVERT
+    "V",            IDM_FILE_PREVIOUS,      VIRTKEY, CONTROL, NOINVERT
+    "X",            IDM_FILE_EXIT,          VIRTKEY, ALT, NOINVERT
+END
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Icon
+//
+
+// Icon with lowest ID value placed first to ensure application icon
+// remains consistent on all systems.
+VISUALPNG               ICON    DISCARDABLE     "VisualPng.ico"
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Dialog
+//
+
+ABOUTBOX DIALOG DISCARDABLE  0, 0, 186, 94
+STYLE DS_MODALFRAME | WS_POPUP
+FONT 8, "MS Sans Serif"
+BEGIN
+    DEFPUSHBUTTON   "OK",IDOK,68,67,50,14
+    CTEXT           "VisualPng 1.0  -  June 2000",IDC_STATIC,49,14,88,8
+    LTEXT           "a PNG image viewer",IDC_STATIC,60,30,66,8
+    LTEXT           "(c) Willem van Schaik, 2000",IDC_STATIC,48,52,90,8
+    LTEXT           "to demonstrate the use of libpng in Visual C",
+                    IDC_STATIC,25,38,136,8
+END
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DESIGNINFO
+//
+
+#ifdef APSTUDIO_INVOKED
+GUIDELINES DESIGNINFO DISCARDABLE 
+BEGIN
+    "ABOUTBOX", DIALOG
+    BEGIN
+        LEFTMARGIN, 7
+        RIGHTMARGIN, 179
+        TOPMARGIN, 7
+        BOTTOMMARGIN, 87
+    END
+END
+#endif    // APSTUDIO_INVOKED
+
+#endif    // English (U.S.) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
+

contrib/visupng/cexcept.h

@@ -1,25 +1,30 @@
 /*===
-cexcept.h 2.0.0 (2001-Jul-12-Thu)
-Adam M. Costello <amc@cs.berkeley.edu>
+cexcept.h 2.0.1 (2008-Jul-19-Sat)
+http://www.nicemice.net/cexcept/
+Adam M. Costello
+http://www.nicemice.net/amc/
 
 An interface for exception-handling in ANSI C (C89 and subsequent ISO
-standards), developed jointly with Cosmin Truta <cosmin@cs.toronto.edu>.
+standards), developed jointly with Cosmin Truta.
 
-    Copyright (c) 2001 Adam M. Costello and Cosmin Truta.  Everyone
-    is hereby granted permission to do whatever they like with this
-    file, provided that if they modify it they take reasonable steps to
-    avoid confusing or misleading people about the authors, version,
-    and terms of use of the derived file.  The copyright holders make
-    no guarantees regarding this file, and are not responsible for any
-    damage resulting from its use.
+    Copyright (c) 2000-2008 Adam M. Costello and Cosmin Truta.
+    This software may be modified only if its author and version
+    information is updated accurately, and may be redistributed
+    only if accompanied by this unaltered notice.  Subject to those
+    restrictions, permission is granted to anyone to do anything
+    with this software.  The copyright holders make no guarantees
+    regarding this software, and are not responsible for any damage
+    resulting from its use.
 
-Only user-defined exceptions are supported, not "real" exceptions like
-division by zero or memory segmentation violations.
+The cexcept interface is not compatible with and cannot interact
+with system exceptions (like division by zero or memory segmentation
+violation), compiler-generated exceptions (like C++ exceptions), or
+other exception-handling interfaces.
 
-If this interface is used by multiple .c files, they shouldn't include
+When using this interface across multiple .c files, do not include
 this header file directly.  Instead, create a wrapper header file that
 includes this header file and then invokes the define_exception_type
-macro (see below), and let your .c files include that header file.
+macro (see below).  The .c files should then include that header file.
 
 The interface consists of one type, one well-known name, and six macros.
 
@@ -164,7 +169,7 @@ Throw expression;
     be compatible with the type passed to define_exception_type().  The
     exception must be caught, otherwise the program may crash.
 
-    Slight limitation:  If the expression is a comma-expression it must
+    Slight limitation:  If the expression is a comma-expression, it must
     be enclosed in parentheses.
 
 
@@ -209,11 +214,11 @@ struct exception_context { \
     exception__prev = the_exception_context->penv; \
     the_exception_context->penv = &exception__env; \
     if (setjmp(exception__env) == 0) { \
-      if (&exception__prev)
+      do
 
 #define exception__catch(action) \
-      else { } \
-      the_exception_context->caught = 0; \
+      while (the_exception_context->caught = 0, \
+             the_exception_context->caught); \
     } \
     else { \
       the_exception_context->caught = 1; \
@@ -226,14 +231,14 @@ struct exception_context { \
 #define Catch(e) exception__catch(((e) = the_exception_context->v.etmp, 0))
 #define Catch_anonymous exception__catch(0)
 
-/* Try ends with if(), and Catch begins and ends with else.  This     */
-/* ensures that the Try/Catch syntax is really the same as the        */
-/* if/else syntax.                                                    */
+/* Try ends with do, and Catch begins with while(0) and ends with     */
+/* else, to ensure that Try/Catch syntax is similar to if/else        */
+/* syntax.                                                            */
 /*                                                                    */
-/* We use &exception__prev instead of 1 to appease compilers that     */
-/* warn about constant expressions inside if().  Most compilers       */
-/* should still recognize that &exception__prev is never zero and     */
-/* avoid generating test code.                                        */
+/* The 0 in while(0) is expressed as x=0,x in order to appease        */
+/* compilers that warn about constant expressions inside while().     */
+/* Most compilers should still recognize that the condition is always */
+/* false and avoid generating code for it.                            */
 
 #define Throw \
   for (;; longjmp(*the_exception_context->penv, 1)) \

depcomp

@@ -1,7 +1,10 @@
 #! /bin/sh
-
 # depcomp - compile a program generating dependencies as side-effects
-# Copyright 1999, 2000 Free Software Foundation, Inc.
+
+scriptversion=2007-03-29.01
+
+# Copyright (C) 1999, 2000, 2003, 2004, 2005, 2006, 2007 Free Software
+# Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -15,8 +18,8 @@
 
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
 
 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
@@ -25,22 +28,45 @@
 
 # Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
 
+case $1 in
+  '')
+     echo "$0: No command.  Try \`$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: depcomp [--help] [--version] PROGRAM [ARGS]
+
+Run PROGRAMS ARGS to compile a file, generating dependencies
+as side-effects.
+
+Environment variables:
+  depmode     Dependency tracking mode.
+  source      Source file read by `PROGRAMS ARGS'.
+  object      Object file output by `PROGRAMS ARGS'.
+  DEPDIR      directory where to store dependencies.
+  depfile     Dependency file to output.
+  tmpdepfile  Temporary file to use when outputing dependencies.
+  libtool     Whether libtool is used (yes/no).
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "depcomp $scriptversion"
+    exit $?
+    ;;
+esac
+
 if test -z "$depmode" || test -z "$source" || test -z "$object"; then
   echo "depcomp: Variables source, object and depmode must be set" 1>&2
   exit 1
 fi
-# `libtool' can also be set to `yes' or `no'.
-
-if test -z "$depfile"; then
-   base=`echo "$object" | sed -e 's,^.*/,,' -e 's,\.\([^.]*\)$,.P\1,'`
-   dir=`echo "$object" | sed 's,/.*$,/,'`
-   if test "$dir" = "$object"; then
-      dir=
-   fi
-   # FIXME: should be _deps on DOS.
-   depfile="$dir.deps/$base"
-fi
 
+# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
+depfile=${depfile-`echo "$object" |
+  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
 tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
 
 rm -f "$tmpdepfile"
@@ -66,7 +92,20 @@ gcc3)
 ## gcc 3 implements dependency tracking that does exactly what
 ## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
 ## it if -MD -MP comes after the -MF stuff.  Hmm.
-  "$@" -MT "$object" -MD -MP -MF "$tmpdepfile"
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
   stat=$?
   if test $stat -eq 0; then :
   else
@@ -172,31 +211,43 @@ sgi)
 
 aix)
   # The C for AIX Compiler uses -M and outputs the dependencies
-  # in a .u file.  This file always lives in the current directory.
-  # Also, the AIX compiler puts `$object:' at the start of each line;
-  # $object doesn't have directory information.
-  stripped=`echo "$object" | sed -e 's,^.*/,,' -e 's/\(.*\)\..*$/\1/'`
-  tmpdepfile="$stripped.u"
-  outname="$stripped.o"
+  # in a .u file.  In older versions, this file always lives in the
+  # current directory.  Also, the AIX compiler puts `$object:' at the
+  # start of each line; $object doesn't have directory information.
+  # Version 6 uses the directory in both cases.
+  dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+  test "x$dir" = "x$object" && dir=
+  base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
   if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
     "$@" -Wc,-M
   else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
     "$@" -M
   fi
-
   stat=$?
+
   if test $stat -eq 0; then :
   else
-    rm -f "$tmpdepfile"
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
     exit $stat
   fi
 
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
   if test -f "$tmpdepfile"; then
     # Each line is of the form `foo.o: dependent.h'.
     # Do two passes, one to just change these to
     # `$object: dependent.h' and one to simply `dependent.h:'.
-    sed -e "s,^$outname:,$object :," < "$tmpdepfile" > "$depfile"
-    sed -e "s,^$outname: \(.*\)$,\1:," < "$tmpdepfile" >> "$depfile"
+    sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
+    # That's a tab and a space in the [].
+    sed -e 's,^.*\.[a-z]*:[	 ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
   else
     # The sourcefile does not contain any dependencies, so just
     # store a dummy comment line, to avoid errors with the Makefile
@@ -206,6 +257,84 @@ aix)
   rm -f "$tmpdepfile"
   ;;
 
+icc)
+  # Intel's C compiler understands `-MD -MF file'.  However on
+  #    icc -MD -MF foo.d -c -o sub/foo.o sub/foo.c
+  # ICC 7.0 will fill foo.d with something like
+  #    foo.o: sub/foo.c
+  #    foo.o: sub/foo.h
+  # which is wrong.  We want:
+  #    sub/foo.o: sub/foo.c
+  #    sub/foo.o: sub/foo.h
+  #    sub/foo.c:
+  #    sub/foo.h:
+  # ICC 7.1 will output
+  #    foo.o: sub/foo.c sub/foo.h
+  # and will wrap long lines using \ :
+  #    foo.o: sub/foo.c ... \
+  #     sub/foo.h ... \
+  #     ...
+
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each line is of the form `foo.o: dependent.h',
+  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
+  # Do two passes, one to just change these to
+  # `$object: dependent.h' and one to simply `dependent.h:'.
+  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" |
+    sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+  test "x$dir" = "x$object" && dir=
+  base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[a-z]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add `dependent.h:' lines.
+    sed -ne '2,${; s/^ *//; s/ \\*$//; s/$/:/; p;}' "$tmpdepfile" >> "$depfile"
+  else
+    echo "#dummy" > "$depfile"
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
 tru64)
    # The Tru64 compiler uses -MD to generate dependencies as a side
    # effect.  `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'.
@@ -217,31 +346,47 @@ tru64)
    base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
 
    if test "$libtool" = yes; then
-      tmpdepfile1="$dir.libs/$base.lo.d"
-      tmpdepfile2="$dir.libs/$base.d"
+      # With Tru64 cc, shared objects can also be used to make a
+      # static library.  This mechanism is used in libtool 1.4 series to
+      # handle both shared and static libraries in a single compilation.
+      # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d.
+      #
+      # With libtool 1.5 this exception was removed, and libtool now
+      # generates 2 separate objects for the 2 libraries.  These two
+      # compilations output dependencies in $dir.libs/$base.o.d and
+      # in $dir$base.o.d.  We have to check for both files, because
+      # one of the two compilations can be disabled.  We should prefer
+      # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+      # automatically cleaned when .libs/ is deleted, while ignoring
+      # the former would cause a distcleancheck panic.
+      tmpdepfile1=$dir.libs/$base.lo.d   # libtool 1.4
+      tmpdepfile2=$dir$base.o.d          # libtool 1.5
+      tmpdepfile3=$dir.libs/$base.o.d    # libtool 1.5
+      tmpdepfile4=$dir.libs/$base.d      # Compaq CCC V6.2-504
       "$@" -Wc,-MD
    else
-      tmpdepfile1="$dir$base.o.d"
-      tmpdepfile2="$dir$base.d"
+      tmpdepfile1=$dir$base.o.d
+      tmpdepfile2=$dir$base.d
+      tmpdepfile3=$dir$base.d
+      tmpdepfile4=$dir$base.d
       "$@" -MD
    fi
 
    stat=$?
    if test $stat -eq 0; then :
    else
-      rm -f "$tmpdepfile1" "$tmpdepfile2"
+      rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
       exit $stat
    fi
 
-   if test -f "$tmpdepfile1"; then
-      tmpdepfile="$tmpdepfile1"
-   else
-      tmpdepfile="$tmpdepfile2"
-   fi
+   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
+   do
+     test -f "$tmpdepfile" && break
+   done
    if test -f "$tmpdepfile"; then
       sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
-      # That's a space and a tab in the [].
-      sed -e 's,^.*\.[a-z]*:[ 	]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
+      # That's a tab and a space in the [].
+      sed -e 's,^.*\.[a-z]*:[	 ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
    else
       echo "#dummy" > "$depfile"
    fi
@@ -254,7 +399,7 @@ tru64)
 
 dashmstdout)
   # Important note: in order to support this mode, a compiler *must*
-  # always write the proprocessed file to stdout, regardless of -o.
+  # always write the preprocessed file to stdout, regardless of -o.
   "$@" || exit $?
 
   # Remove the call to Libtool.
@@ -265,9 +410,7 @@ dashmstdout)
     shift
   fi
 
-  # Remove `-o $object'.  We will use -o /dev/null later,
-  # however we can't do the remplacement now because
-  # `-o $object' might simply not be used
+  # Remove `-o $object'.
   IFS=" "
   for arg
   do
@@ -287,7 +430,11 @@ dashmstdout)
   done
 
   test -z "$dashmflag" && dashmflag=-M
-  "$@" -o /dev/null $dashmflag | sed 's:^[^:]*\:[ 	]*:'"$object"'\: :' > "$tmpdepfile"
+  # Require at least two characters before searching for `:'
+  # in the target name.  This is to cope with DOS-style filenames:
+  # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise.
+  "$@" $dashmflag |
+    sed 's:^[  ]*[^: ][^:][^:]*\:[    ]*:'"$object"'\: :' > "$tmpdepfile"
   rm -f "$depfile"
   cat < "$tmpdepfile" > "$depfile"
   tr ' ' '
@@ -306,6 +453,13 @@ dashXmstdout)
 
 makedepend)
   "$@" || exit $?
+  # Remove any Libtool call
+  if test "$libtool" = yes; then
+    while test $1 != '--mode=compile'; do
+      shift
+    done
+    shift
+  fi
   # X makedepend
   shift
   cleared=no
@@ -318,7 +472,9 @@ makedepend)
     case "$arg" in
     -D*|-I*)
       set fnord "$@" "$arg"; shift ;;
-    -*)
+    # Strip any option that makedepend may not understand.  Remove
+    # the object too, otherwise makedepend will parse it as a source file.
+    -*|$object)
       ;;
     *)
       set fnord "$@" "$arg"; shift ;;
@@ -339,7 +495,7 @@ makedepend)
 
 cpp)
   # Important note: in order to support this mode, a compiler *must*
-  # always write the proprocessed file to stdout.
+  # always write the preprocessed file to stdout.
   "$@" || exit $?
 
   # Remove the call to Libtool.
@@ -370,7 +526,8 @@ cpp)
   done
 
   "$@" -E |
-    sed -n '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' |
+    sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+       -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' |
     sed '$ s: \\$::' > "$tmpdepfile"
   rm -f "$depfile"
   echo "$object : \\" > "$depfile"
@@ -381,7 +538,7 @@ cpp)
 
 msvisualcpp)
   # Important note: in order to support this mode, a compiler *must*
-  # always write the proprocessed file to stdout, regardless of -o,
+  # always write the preprocessed file to stdout, regardless of -o,
   # because we must use -o when running libtool.
   "$@" || exit $?
   IFS=" "
@@ -421,3 +578,12 @@ none)
 esac
 
 exit 0
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-end: "$"
+# End:

example.c

@@ -1,7 +1,13 @@
 
 #if 0 /* in case someone actually tries to compile this */
 
-/* example.c - an example of using libpng */
+/* example.c - an example of using libpng
+ * Last changed in libpng 1.2.35 [February 12, 2009]
+ * This file has been placed in the public domain by the authors.
+ * Maintained 1998-2009 Glenn Randers-Pehrson
+ * Maintained 1996, 1997 Andreas Dilger)
+ * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ */
 
 /* This is an example of how to use libpng to read and write PNG files.
  * The file libpng.txt is much more verbose then this.  If you have not
@@ -194,11 +200,11 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
 
    /* Expand paletted colors into true RGB triplets */
    if (color_type == PNG_COLOR_TYPE_PALETTE)
-      png_set_palette_rgb(png_ptr);
+      png_set_palette_to_rgb(png_ptr);
 
    /* Expand grayscale images to the full 8 bits from 1, 2, or 4 bits/pixel */
    if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
-      png_set_gray_1_2_4_to_8(png_ptr);
+      png_set_expand_gray_1_2_4_to_8(png_ptr);
 
    /* Expand paletted or RGB images with transparency to full alpha channels
     * so the data will be available as RGBA quartets.
@@ -336,11 +342,13 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
    /* The easiest way to read the image: */
    png_bytep row_pointers[height];
 
+   /* Clear the pointer array */
+   for (row = 0; row < height; row++)
+      row_pointers[row] = NULL;
+
    for (row = 0; row < height; row++)
-   {
       row_pointers[row] = png_malloc(png_ptr, png_get_rowbytes(png_ptr,
          info_ptr));
-   }
 
    /* Now it's time to read the image.  One of these methods is REQUIRED */
 #ifdef entire /* Read the entire image in one go */
@@ -490,16 +498,16 @@ row_callback(png_structp png_ptr, png_bytep new_row,
  * In this function you will receive a pointer to new row data from
  * libpng called new_row that is to replace a corresponding row (of
  * the same data format) in a buffer allocated by your application.
- * 
+ *
  * The new row data pointer new_row may be NULL, indicating there is
  * no new data to be replaced (in cases of interlace loading).
- * 
+ *
  * If new_row is not NULL then you need to call
  * png_progressive_combine_row() to replace the corresponding row as
  * shown below:
  */
    /* Check if row_num is in bounds. */
-   if((row_num >= 0) && (row_num < height))
+   if ((row_num >= 0) && (row_num < height))
    {
      /* Get pointer to corresponding row in our
       * PNG read buffer.
@@ -509,7 +517,7 @@ row_callback(png_structp png_ptr, png_bytep new_row,
      /* If both rows are allocated then copy the new row
       * data to the corresponding row data.
       */
-     if((old_row != NULL) && (new_row != NULL))
+     if ((old_row != NULL) && (new_row != NULL))
      png_progressive_combine_row(png_ptr, old_row, new_row);
    }
 /*
@@ -602,7 +610,7 @@ void write_png(char *file_name /* , ... other image information ... */)
    /* set up the output control if you are using standard C streams */
    png_init_io(png_ptr, fp);
 #else no_streams /* I/O initialization method 2 */
-   /* If you are using replacement read functions, instead of calling
+   /* If you are using replacement write functions, instead of calling
     * png_init_io() here you would call */
    png_set_write_fn(png_ptr, (void *)user_io_ptr, user_write_fn,
       user_IO_flush_function);
@@ -631,7 +639,7 @@ void write_png(char *file_name /* , ... other image information ... */)
 
    /* set the palette if there is one.  REQUIRED for indexed-color images */
    palette = (png_colorp)png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH
-             * png_sizeof (png_color));
+             * png_sizeof(png_color));
    /* ... set palette colors ... */
    png_set_PLTE(png_ptr, info_ptr, palette, PNG_MAX_PALETTE_LENGTH);
    /* You must not free palette here, because png_set_PLTE only makes a link to
@@ -765,9 +773,7 @@ void write_png(char *file_name /* , ... other image information ... */)
 
       /* If you are only writing one row at a time, this works */
       for (y = 0; y < height; y++)
-      {
          png_write_rows(png_ptr, &row_pointers[y], 1);
-      }
    }
 #endif no_entire /* use only one output method */
 
@@ -787,13 +793,13 @@ void write_png(char *file_name /* , ... other image information ... */)
       allocated it with malloc() instead of png_malloc(), use free() instead
       of png_free(). */
    png_free(png_ptr, palette);
-   palette=NULL;
+   palette = NULL;
 
    /* Similarly, if you png_malloced any data that you passed in with
       png_set_something(), such as a hist or trans array, free it here,
       when you can be sure that libpng is through with it. */
    png_free(png_ptr, trans);
-   trans=NULL;
+   trans = NULL;
 
    /* clean up after the write, and free any memory allocated */
    png_destroy_write_struct(&png_ptr, &info_ptr);

install-sh

@@ -1,276 +1,519 @@
 #!/bin/sh
-#
 # install - install a program, script, or datafile
-# This comes from X11R5 (mit/util/scripts/install.sh).
+
+scriptversion=2006-12-25.00
+
+# This originates from X11R5 (mit/util/scripts/install.sh), which was
+# later released in X11R6 (xc/config/util/install.sh) with the
+# following copyright and license.
 #
-# Copyright 1991 by the Massachusetts Institute of Technology
+# Copyright (C) 1994 X Consortium
 #
-# Permission to use, copy, modify, distribute, and sell this software and its
-# documentation for any purpose is hereby granted without fee, provided that
-# the above copyright notice appear in all copies and that both that
-# copyright notice and this permission notice appear in supporting
-# documentation, and that the name of M.I.T. not be used in advertising or
-# publicity pertaining to distribution of the software without specific,
-# written prior permission.  M.I.T. makes no representations about the
-# suitability of this software for any purpose.  It is provided "as is"
-# without express or implied warranty.
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
+# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name of the X Consortium shall not
+# be used in advertising or otherwise to promote the sale, use or other deal-
+# ings in this Software without prior written authorization from the X Consor-
+# tium.
+#
+#
+# FSF changes to this file are in the public domain.
 #
 # Calling this script install-sh is preferred over install.sh, to prevent
 # `make' implicit rules from creating a file called install from it
 # when there is no Makefile.
 #
 # This script is compatible with the BSD install script, but was written
-# from scratch.  It can only install one file at a time, a restriction
-# shared with many OS's install programs.
+# from scratch.
 
+nl='
+'
+IFS=" ""	$nl"
 
 # set DOITPROG to echo to test this script
 
 # Don't use :- since 4.3BSD and earlier shells don't like it.
-doit="${DOITPROG-}"
+doit=${DOITPROG-}
+if test -z "$doit"; then
+  doit_exec=exec
+else
+  doit_exec=$doit
+fi
 
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.
 
-# put in absolute paths if you don't have them in your path; or use env. vars.
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
 
-mvprog="${MVPROG-mv}"
-cpprog="${CPPROG-cp}"
-chmodprog="${CHMODPROG-chmod}"
-chownprog="${CHOWNPROG-chown}"
-chgrpprog="${CHGRPPROG-chgrp}"
-stripprog="${STRIPPROG-strip}"
-rmprog="${RMPROG-rm}"
-mkdirprog="${MKDIRPROG-mkdir}"
+posix_glob='?'
+initialize_posix_glob='
+  test "$posix_glob" != "?" || {
+    if (set -f) 2>/dev/null; then
+      posix_glob=
+    else
+      posix_glob=:
+    fi
+  }
+'
 
-transformbasename=""
-transform_arg=""
-instcmd="$mvprog"
-chmodcmd="$chmodprog 0755"
-chowncmd=""
-chgrpcmd=""
-stripcmd=""
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+chgrpcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
 rmcmd="$rmprog -f"
-mvcmd="$mvprog"
-src=""
-dst=""
-dir_arg=""
+stripcmd=
 
-while [ x"$1" != x ]; do
-    case $1 in
-	-c) instcmd=$cpprog
-	    shift
-	    continue;;
+src=
+dst=
+dir_arg=
+dst_arg=
 
-	-d) dir_arg=true
-	    shift
-	    continue;;
+copy_on_change=false
+no_target_directory=
 
-	-m) chmodcmd="$chmodprog $2"
-	    shift
-	    shift
-	    continue;;
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+   or: $0 [OPTION]... SRCFILES... DIRECTORY
+   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
+   or: $0 [OPTION]... -d DIRECTORIES...
 
-	-o) chowncmd="$chownprog $2"
-	    shift
-	    shift
-	    continue;;
+In the 1st form, copy SRCFILE to DSTFILE.
+In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
+In the 4th, create DIRECTORIES.
 
-	-g) chgrpcmd="$chgrpprog $2"
-	    shift
-	    shift
-	    continue;;
+Options:
+     --help     display this help and exit.
+     --version  display version info and exit.
 
-	-s) stripcmd=$stripprog
-	    shift
-	    continue;;
+  -c            (ignored)
+  -C            install only if different (preserve the last data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -s            $stripprog installed files.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.
 
-	-t=*) transformarg=`echo $1 | sed 's/-t=//'`
-	    shift
-	    continue;;
+Environment variables override the default commands:
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+"
 
-	-b=*) transformbasename=`echo $1 | sed 's/-b=//'`
-	    shift
-	    continue;;
+while test $# -ne 0; do
+  case $1 in
+    -c) ;;
 
-	*)  if [ x"$src" = x ]
-	    then
-		src=$1
-	    else
-		# this colon is to work around a 386BSD /bin/sh bug
-		:
-		dst=$1
-	    fi
-	    shift
-	    continue;;
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;
+
+    -g) chgrpcmd="$chgrpprog $2"
+	shift;;
+
+    --help) echo "$usage"; exit $?;;
+
+    -m) mode=$2
+	case $mode in
+	  *' '* | *'	'* | *'
+'*	  | *'*'* | *'?'* | *'['*)
+	    echo "$0: invalid mode: $mode" >&2
+	    exit 1;;
+	esac
+	shift;;
+
+    -o) chowncmd="$chownprog $2"
+	shift;;
+
+    -s) stripcmd=$stripprog;;
+
+    -t) dst_arg=$2
+	shift;;
+
+    -T) no_target_directory=true;;
+
+    --version) echo "$0 $scriptversion"; exit $?;;
+
+    --)	shift
+	break;;
+
+    -*)	echo "$0: invalid option: $1" >&2
+	exit 1;;
+
+    *)  break;;
+  esac
+  shift
+done
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+  done
+fi
+
+if test $# -eq 0; then
+  if test -z "$dir_arg"; then
+    echo "$0: no input file specified." >&2
+    exit 1
+  fi
+  # It's OK to call `install-sh -d' without argument.
+  # This can happen when creating conditional directories.
+  exit 0
+fi
+
+if test -z "$dir_arg"; then
+  trap '(exit $?); exit' 1 2 13 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+	u_plus_rw=
+      else
+	u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+	u_plus_rw=
+      else
+	u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
+for src
+do
+  # Protect names starting with `-'.
+  case $src in
+    -*) src=./$src;;
+  esac
+
+  if test -n "$dir_arg"; then
+    dst=$src
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+  else
+
+    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
+    # might cause directories to be created, which would be especially bad
+    # if $src (and thus $dsttmp) contains '*'.
+    if test ! -f "$src" && test ! -d "$src"; then
+      echo "$0: $src does not exist." >&2
+      exit 1
+    fi
+
+    if test -z "$dst_arg"; then
+      echo "$0: no destination specified." >&2
+      exit 1
+    fi
+
+    dst=$dst_arg
+    # Protect names starting with `-'.
+    case $dst in
+      -*) dst=./$dst;;
     esac
-done
 
-if [ x"$src" = x ]
-then
-	echo "$0: no input file specified" >&2
+    # If destination is a directory, append the input filename; won't work
+    # if double slashes aren't ignored.
+    if test -d "$dst"; then
+      if test -n "$no_target_directory"; then
+	echo "$0: $dst_arg: Is a directory" >&2
 	exit 1
-else
-	:
-fi
+      fi
+      dstdir=$dst
+      dst=$dstdir/`basename "$src"`
+      dstdir_status=0
+    else
+      # Prefer dirname, but fall back on a substitute if dirname fails.
+      dstdir=`
+	(dirname "$dst") 2>/dev/null ||
+	expr X"$dst" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	     X"$dst" : 'X\(//\)[^/]' \| \
+	     X"$dst" : 'X\(//\)$' \| \
+	     X"$dst" : 'X\(/\)' \| . 2>/dev/null ||
+	echo X"$dst" |
+	    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\/\)[^/].*/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\/\)$/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\).*/{
+		   s//\1/
+		   q
+		 }
+		 s/.*/./; q'
+      `
 
-if [ x"$dir_arg" != x ]; then
-	dst=$src
-	src=""
+      test -d "$dstdir"
+      dstdir_status=$?
+    fi
+  fi
 
-	if [ -d "$dst" ]; then
-		instcmd=:
-		chmodcmd=""
+  obsolete_mkdir_used=false
+
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+	# Create intermediate dirs using mode 755 as modified by the umask.
+	# This is like FreeBSD 'install' as of 1997-10-28.
+	umask=`umask`
+	case $stripcmd.$umask in
+	  # Optimize common cases.
+	  *[2367][2367]) mkdir_umask=$umask;;
+	  .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;
+
+	  *[0-7])
+	    mkdir_umask=`expr $umask + 22 \
+	      - $umask % 100 % 40 + $umask % 20 \
+	      - $umask % 10 % 4 + $umask % 2
+	    `;;
+	  *) mkdir_umask=$umask,go-w;;
+	esac
+
+	# With -d, create the new directory with the user-specified mode.
+	# Otherwise, rely on $mkdir_umask.
+	if test -n "$dir_arg"; then
+	  mkdir_mode=-m$mode
 	else
-		instcmd=$mkdirprog
-	fi
-else
-
-# Waiting for this to be detected by the "$instcmd $src $dsttmp" command
-# might cause directories to be created, which would be especially bad
-# if $src (and thus $dsttmp) contains '*'.
-
-	if [ -f "$src" ] || [ -d "$src" ]
-	then
-		:
-	else
-		echo "$0: $src does not exist" >&2
-		exit 1
+	  mkdir_mode=
 	fi
 
-	if [ x"$dst" = x ]
-	then
-		echo "$0: no destination specified" >&2
-		exit 1
+	posix_mkdir=false
+	case $umask in
+	  *[123567][0-7][0-7])
+	    # POSIX mkdir -p sets u+wx bits regardless of umask, which
+	    # is incompatible with FreeBSD 'install' when (umask & 300) != 0.
+	    ;;
+	  *)
+	    tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+	    trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0
+
+	    if (umask $mkdir_umask &&
+		exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1
+	    then
+	      if test -z "$dir_arg" || {
+		   # Check for POSIX incompatibilities with -m.
+		   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+		   # other-writeable bit of parent directory when it shouldn't.
+		   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+		   ls_ld_tmpdir=`ls -ld "$tmpdir"`
+		   case $ls_ld_tmpdir in
+		     d????-?r-*) different_mode=700;;
+		     d????-?--*) different_mode=755;;
+		     *) false;;
+		   esac &&
+		   $mkdirprog -m$different_mode -p -- "$tmpdir" && {
+		     ls_ld_tmpdir_1=`ls -ld "$tmpdir"`
+		     test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+		   }
+		 }
+	      then posix_mkdir=:
+	      fi
+	      rmdir "$tmpdir/d" "$tmpdir"
+	    else
+	      # Remove any dirs left behind by ancient mkdir implementations.
+	      rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null
+	    fi
+	    trap '' 0;;
+	esac;;
+    esac
+
+    if
+      $posix_mkdir && (
+	umask $mkdir_umask &&
+	$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # The umask is ridiculous, or mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+	/*) prefix='/';;
+	-*) prefix='./';;
+	*)  prefix='';;
+      esac
+
+      eval "$initialize_posix_glob"
+
+      oIFS=$IFS
+      IFS=/
+      $posix_glob set -f
+      set fnord $dstdir
+      shift
+      $posix_glob set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+	test -z "$d" && continue
+
+	prefix=$prefix$d
+	if test -d "$prefix"; then
+	  prefixes=
 	else
-		:
+	  if $posix_mkdir; then
+	    (umask=$mkdir_umask &&
+	     $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+	    # Don't fail if two instances are running concurrently.
+	    test -d "$prefix" || exit 1
+	  else
+	    case $prefix in
+	      *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+	      *) qprefix=$prefix;;
+	    esac
+	    prefixes="$prefixes '$qprefix'"
+	  fi
 	fi
+	prefix=$prefix/
+      done
 
-# If destination is a directory, append the input filename; if your system
-# does not like double slashes in filenames, you may need to add some logic
+      if test -n "$prefixes"; then
+	# Don't fail if two instances are running concurrently.
+	(umask $mkdir_umask &&
+	 eval "\$doit_exec \$mkdirprog $prefixes") ||
+	  test -d "$dstdir" || exit 1
+	obsolete_mkdir_used=true
+      fi
+    fi
+  fi
 
-	if [ -d "$dst" ]
-	then
-		dst=$dst/`basename "$src"`
-	else
-		:
-	fi
-fi
+  if test -n "$dir_arg"; then
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
+  else
 
-## this sed command emulates the dirname command
-dstdir=`echo "$dst" | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
+    # Make a couple of temp file names in the proper directory.
+    dsttmp=$dstdir/_inst.$$_
+    rmtmp=$dstdir/_rm.$$_
 
-# Make sure that the destination directory exists.
-#  this part is taken from Noah Friedman's mkinstalldirs script
+    # Trap to clean up those temp files at exit.
+    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
 
-# Skip lots of stat calls in the usual case.
-if [ ! -d "$dstdir" ]; then
-defaultIFS='
-	'
-IFS="${IFS-$defaultIFS}"
+    # Copy the file name to the temp name.
+    (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&
 
-oIFS=$IFS
-# Some sh's can't handle IFS=/ for some reason.
-IFS='%'
-set - `echo "$dstdir" | sed -e 's@/@%@g' -e 's@^%@/@'`
-IFS=$oIFS
+    # and set any options; do chmod last to preserve setuid bits.
+    #
+    # If any of these fail, we abort the whole thing.  If we want to
+    # ignore errors from any of these, just make sure not to ignore
+    # errors from the above "$doit $cpprog $src $dsttmp" command.
+    #
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
 
-pathcomp=''
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"	2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"	2>/dev/null` &&
 
-while [ $# -ne 0 ] ; do
-	pathcomp=$pathcomp$1
-	shift
+       eval "$initialize_posix_glob" &&
+       $posix_glob set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       $posix_glob set +f &&
 
-	if [ ! -d "$pathcomp" ] ;
-        then
-		$mkdirprog "$pathcomp"
-	else
-		:
-	fi
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
 
-	pathcomp=$pathcomp/
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+	# Now remove or move aside any old file at destination location.
+	# We try this two ways since rm can't unlink itself on some
+	# systems and the destination file might be busy for other
+	# reasons.  In this case, the final cleanup might fail but the new
+	# file should still install successfully.
+	{
+	  test ! -f "$dst" ||
+	  $doit $rmcmd -f "$dst" 2>/dev/null ||
+	  { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+	    { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
+	  } ||
+	  { echo "$0: cannot unlink or rename $dst" >&2
+	    (exit 1); exit 1
+	  }
+	} &&
+
+	# Now rename the file to the real destination.
+	$doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
 done
-fi
 
-if [ x"$dir_arg" != x ]
-then
-	$doit $instcmd "$dst" &&
-
-	if [ x"$chowncmd" != x ]; then $doit $chowncmd "$dst"; else : ; fi &&
-	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd "$dst"; else : ; fi &&
-	if [ x"$stripcmd" != x ]; then $doit $stripcmd "$dst"; else : ; fi &&
-	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd "$dst"; else : ; fi
-else
-
-# If we're going to rename the final executable, determine the name now.
-
-	if [ x"$transformarg" = x ]
-	then
-		dstfile=`basename "$dst"`
-	else
-		dstfile=`basename "$dst" $transformbasename |
-			sed $transformarg`$transformbasename
-	fi
-
-# don't allow the sed command to completely eliminate the filename
-
-	if [ x"$dstfile" = x ]
-	then
-		dstfile=`basename "$dst"`
-	else
-		:
-	fi
-
-# Make a couple of temp file names in the proper directory.
-
-	dsttmp=$dstdir/#inst.$$#
-	rmtmp=$dstdir/#rm.$$#
-
-# Trap to clean up temp files at exit.
-
-	trap 'status=$?; rm -f "$dsttmp" "$rmtmp" && exit $status' 0
-	trap '(exit $?); exit' 1 2 13 15
-
-# Move or copy the file name to the temp name
-
-	$doit $instcmd "$src" "$dsttmp" &&
-
-# and set any options; do chmod last to preserve setuid bits
-
-# If any of these fail, we abort the whole thing.  If we want to
-# ignore errors from any of these, just make sure not to ignore
-# errors from the above "$doit $instcmd $src $dsttmp" command.
-
-	if [ x"$chowncmd" != x ]; then $doit $chowncmd "$dsttmp"; else :;fi &&
-	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd "$dsttmp"; else :;fi &&
-	if [ x"$stripcmd" != x ]; then $doit $stripcmd "$dsttmp"; else :;fi &&
-	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd "$dsttmp"; else :;fi &&
-
-# Now remove or move aside any old file at destination location.  We try this
-# two ways since rm can't unlink itself on some systems and the destination
-# file might be busy for other reasons.  In this case, the final cleanup
-# might fail but the new file should still install successfully.
-
-{
-	if [ -f "$dstdir/$dstfile" ]
-	then
-		$doit $rmcmd -f "$dstdir/$dstfile" 2>/dev/null ||
-		$doit $mvcmd -f "$dstdir/$dstfile" "$rmtmp" 2>/dev/null ||
-		{
-		  echo "$0: cannot unlink or rename $dstdir/$dstfile" >&2
-		  (exit 1); exit
-		}
-	else
-		:
-	fi
-} &&
-
-# Now rename the file to the real destination.
-
-	$doit $mvcmd "$dsttmp" "$dstdir/$dstfile"
-
-fi &&
-
-# The final little trick to "correctly" pass the exit status to the exit trap.
-
-{
-	(exit 0); exit
-}
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-end: "$"
+# End:

libpng-1.0.43rc01.txt

@@ -1,13 +1,17 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.8 - December 3, 2004
+ libpng version 1.0.43rc01 - February 12, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
- Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ Copyright (c) 1998-2008 Glenn Randers-Pehrson
  For conditions of distribution and use, see copyright
  notice in png.h.
 
- based on:
+ Based on:
+
+ libpng versions 0.97, January 1998, through 1.0.43rc01 - February 12, 2009
+ Updated and distributed by Glenn Randers-Pehrson
+ Copyright (c) 1998-2008 Glenn Randers-Pehrson
 
  libpng 1.0 beta 6  version 0.96 May 28, 1997
  Updated and distributed by Andreas Dilger
@@ -33,6 +37,10 @@ it is heavily commented and should include everything most people
 will need.  We assume that libpng is already installed; see the
 INSTALL file for instructions on how to install libpng.
 
+For examples of libpng usage, see the files "example.c", "pngtest.c",
+and the files in the "contrib" directory, all of which are included in the
+libpng distribution.
+
 Libpng was written as a companion to the PNG specification, as a way
 of reducing the amount of time and effort it takes to support the PNG
 file format in application programs.
@@ -43,12 +51,14 @@ a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2003 (E)) at
 The W3C and ISO documents have identical technical content.
 
 The PNG-1.2 specification is available at
-<http://www.libpng.org/pub/png/documents/>
+<http://www.libpng.org/pub/png/documents/>.  It is technically equivalent
+to the PNG specification (second edition) but has some additional material.
 
 The PNG-1.0 specification is available
 as RFC 2083 <http://www.libpng.org/pub/png/documents/> and as a
-W3C Recommendation <http://www.w3.org/TR/REC.png.html>. Some
-additional chunks are described in the special-purpose public chunks
+W3C Recommendation <http://www.w3.org/TR/REC.png.html>.
+
+Some additional chunks are described in the special-purpose public chunks
 documents at <http://www.libpng.org/pub/png/documents/>.
 
 Other information
@@ -82,9 +92,7 @@ Libpng is thread safe, provided the threads are using different
 instances of the structures.  Each thread should have its own
 png_struct and png_info instances, and thus its own image.
 Libpng does not protect itself against two threads using the
-same instance of a structure.  Note: thread safety may be defeated
-by use of some of the MMX assembler code in pnggccrd.c, which is only
-compiled when the user defines PNG_THREAD_UNSAFE_OK.
+same instance of a structure.
 
 II. Structures
 
@@ -258,15 +266,19 @@ input stream. You must supply the function
          png_unknown_chunkp chunk);
     {
        /* The unknown chunk structure contains your
-          chunk data: */
+          chunk data, along with similar data for any other
+          unknown chunks: */
+
            png_byte name[5];
            png_byte *data;
            png_size_t size;
+
        /* Note that libpng has already taken care of
           the CRC handling */
 
-       /* put your code here.  Return one of the
-          following: */
+       /* put your code here.  Search for your chunk in the
+          unknown chunk structure, process it, and return one
+          of the following: */
 
        return (-n); /* chunk had an error */
        return (0); /* did not recognize */
@@ -286,6 +298,11 @@ you can retrieve with
 
     png_get_user_chunk_ptr(png_ptr);
 
+If you call the png_set_read_user_chunk_fn() function, then all unknown
+chunks will be saved when read, in case your callback function will need
+one or more of them.  This behavior can be changed with the
+png_set_keep_unknown_chunks() function, described below.
+
 At this point, you can set up a callback function that will be
 called after each row has been read, which you can use to control
 a progress meter or the like.  It's demonstrated in pngtest.c.
@@ -303,40 +320,19 @@ To inform libpng about your function, use
 
     png_set_read_status_fn(png_ptr, read_row_callback);
 
-Width and height limits
-
-The PNG specification allows the width and height of an image to be as
-large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
-Since very few applications really need to process such large images,
-we have imposed an arbitrary 1-million limit on rows and columns.
-Larger images will be rejected immediately with a png_error() call. If
-you wish to override this limit, you can use
-
-   png_set_user_limits(png_ptr, width_max, height_max);
-
-to set your own limits, or use width_max = height_max = 0x7fffffffL
-to allow all valid dimensions (libpng may reject some very large images
-anyway because of potential buffer overflow conditions).
-
-You should put this statement after you create the PNG structure and
-before calling png_read_info(), png_read_png(), or png_process_data().
-If you need to retrieve the limits that are being applied, use
-
-   width_max = png_get_user_width_max(png_ptr);
-   height_max = png_get_user_height_max(png_ptr);
-
 Unknown-chunk handling
 
 Now you get to set the way the library processes unknown chunks in the
 input PNG stream. Both known and unknown chunks will be read.  Normal
 behavior is that known chunks will be parsed into information in
-various info_ptr members; unknown chunks will be discarded. To change
-this, you can call:
+various info_ptr members while unknown chunks will be discarded. This
+behavior can be wasteful if your application will never use some known
+chunk types. To change this, you can call:
 
     png_set_keep_unknown_chunks(png_ptr, keep,
         chunk_list, num_chunks);
-    keep       - 0: do not handle as unknown
-                 1: do not keep
+    keep       - 0: default unknown chunk handling
+                 1: ignore; do not keep
                  2: keep only if safe-to-copy
                  3: keep even if unsafe-to-copy
                You can use these definitions:
@@ -359,6 +355,37 @@ instances of png_set_keep_unknown_chunks(), the final instance will
 take precedence.  The IHDR and IEND chunks should not be named in
 chunk_list; if they are, libpng will process them normally anyway.
 
+Here is an example of the usage of png_set_keep_unknown_chunks(),
+where the private "vpAg" chunk will later be processed by a user chunk
+callback function:
+
+    png_byte vpAg[5]={118, 112,  65, 103, (png_byte) '\0'};
+
+    #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+      png_byte unused_chunks[]=
+      {
+        104,  73,  83,  84, (png_byte) '\0',   /* hIST */
+        105,  84,  88, 116, (png_byte) '\0',   /* iTXt */
+        112,  67,  65,  76, (png_byte) '\0',   /* pCAL */
+        115,  67,  65,  76, (png_byte) '\0',   /* sCAL */
+        115,  80,  76,  84, (png_byte) '\0',   /* sPLT */
+        116,  73,  77,  69, (png_byte) '\0',   /* tIME */
+      };
+    #endif
+
+    ...
+
+    #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+      /* ignore all unknown chunks: */
+      png_set_keep_unknown_chunks(read_ptr, 1, NULL, 0);
+      /* except for vpAg: */
+      png_set_keep_unknown_chunks(read_ptr, 2, vpAg, 1);
+      /* also ignore unused known chunks: */
+      png_set_keep_unknown_chunks(read_ptr, 1, unused_chunks,
+         (int)sizeof(unused_chunks)/5);
+    #endif
+
+
 The high-level read interface
 
 At this point there are two ways to proceed; through the high-level
@@ -392,7 +419,7 @@ dithering, and setting filler.)  If this is the case, simply do this:
 
     png_read_png(png_ptr, info_ptr, png_transforms, NULL)
 
-where png_transforms is an integer containing the logical OR of
+where png_transforms is an integer containing the bitwise OR of
 some set of transformation flags.  This call is equivalent to png_read_info(),
 followed the set of transformations indicated by the transform mask,
 then png_read_image(), and finally png_read_end().
@@ -423,6 +450,8 @@ row_pointers prior to calling png_read_png() with
          "Image is too wide to process in memory");
    row_pointers = png_malloc(png_ptr,
       height*png_sizeof(png_bytep));
+   for (int i=0; i<height, i++)
+      row_pointers[i]=NULL;  /* security precaution */
    for (int i=0; i<height, i++)
       row_pointers[i]=png_malloc(png_ptr,
          width*pixel_size);
@@ -767,7 +796,7 @@ unless the library has been told to transform it into another format.
 For example, 4 bit/pixel paletted or grayscale data will be returned
 2 pixels/byte with the leftmost pixel in the high-order bits of the
 byte, unless png_set_packing() is called.  8-bit RGB data will be stored
-in RGB RGB RGB format unless png_set_filler() or png_set_add_alpha()
+in RGB RGB RGB format unless png_set_filler()
 is called to insert filler bytes, either before or after each RGB triplet.
 16-bit RGB data will be returned RRGGBB RRGGBB, with the most significant
 byte of the color value first, unless png_set_strip_16() is called to
@@ -775,7 +804,7 @@ transform it to regular RGB RGB triplets, or png_set_filler() or
 png_set_add alpha() is called to insert filler bytes, either before or
 after each RRGGBB triplet.  Similarly, 8-bit or 16-bit grayscale data can
 be modified with
-png_set_filler(), png_set_add_alpha(), or png_set_strip_16().
+png_set_filler() or png_set_strip_16().
 
 The following code transforms grayscale images of less than 8 to 8 bits,
 changes paletted images to RGB, and adds a full alpha channel if there is
@@ -797,6 +826,7 @@ in libpng version 1.0.4, with the function names expanded to improve code
 readability.  In some future version they may actually do different
 things.
 
+
 PNG can have files with 16 bits per channel.  If you only can handle
 8 bits per channel, this will strip the pixels down to 8 bit.
 
@@ -860,16 +890,7 @@ does not affect images that already have full alpha channels.  To add an
 opaque alpha channel, use filler=0xff or 0xffff and PNG_FILLER_AFTER which
 will generate RGBA pixels.
 
-Note that png_set_filler() does not change the color type.  If you want
-to do that, you can add a true alpha channel with
-
-    if (color_type == PNG_COLOR_TYPE_RGB ||
            color_type == PNG_COLOR_TYPE_GRAY)
-    png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER);
-
-where "filler" contains the alpha value to assign to each pixel.
-This function was added in libpng-1.2.7.
-
 If you are reading an image with an alpha channel, and you need the
 data as ARGB instead of the normal PNG format RGBA:
 
@@ -1248,8 +1269,8 @@ the second parameter NULL.
 
 Finishing a sequential read
 
-After you are finished reading the image through either the high- or
-low-level interfaces, you can finish reading the file.  If you are
+After you are finished reading the image through the
+low-level interface, you can finish reading the file.  If you are
 interested in comments or time, which may be stored either before or
 after the image data, you should pass the separate png_info struct if
 you want to keep the comments from before and after the image
@@ -1267,7 +1288,7 @@ point to libpng-allocated storage with the following function:
 
     png_free_data(png_ptr, info_ptr, mask, seq)
     mask - identifies data to be freed, a mask
-           containing the logical OR of one or
+           containing the bitwise OR of one or
            more of
              PNG_FREE_PLTE, PNG_FREE_TRNS,
              PNG_FREE_HIST, PNG_FREE_ICCP,
@@ -1329,7 +1350,7 @@ application instead of by libpng, you can use
 
     png_set_invalid(png_ptr, info_ptr, mask);
     mask - identifies the chunks to be made invalid,
-           containing the logical OR of one or
+           containing the bitwise OR of one or
            more of
              PNG_INFO_gAMA, PNG_INFO_sBIT,
              PNG_INFO_cHRM, PNG_INFO_PLTE,
@@ -1596,6 +1617,14 @@ Libpng section below.
 
     png_init_io(png_ptr, fp);
 
+If you are embedding your PNG into a datastream such as MNG, and don't
+want libpng to write the 8-byte signature, or if you have already
+written the signature in your application, use
+
+    png_set_sig_bytes(png_ptr, 8);
+
+to inform libpng that it should not write a signature.
+
 Write callbacks
 
 At this point, you can set up a callback function that will be
@@ -1633,7 +1662,7 @@ types.
 
     /* turn on or off filtering, and/or choose
        specific filters.  You can use either a single
-       PNG_FILTER_VALUE_NAME or the logical OR of one
+       PNG_FILTER_VALUE_NAME or the bitwise OR of one
        or more PNG_FILTER_NAME masks. */
     png_set_filter(png_ptr, 0,
        PNG_FILTER_NONE  | PNG_FILTER_VALUE_NONE |
@@ -1728,6 +1757,11 @@ Some of the more important parts of the png_info are:
                      can also be
                      PNG_INTRAPIXEL_DIFFERENCING)
 
+If you call png_set_IHDR(), the call must appear before any of the
+other png_set_*() functions, which might require access to some of
+the IHDR settings.  The remaining png_set_*() functions can be called
+in any order.
+
     png_set_PLTE(png_ptr, info_ptr, palette,
        num_palette);
     palette        - the palette for the file
@@ -2006,7 +2040,7 @@ png_set_rows() to put image data in the info structure), simply do this:
 
     png_write_png(png_ptr, info_ptr, png_transforms, NULL)
 
-where png_transforms is an integer containing the logical OR of some set of
+where png_transforms is an integer containing the bitwise OR of some set of
 transformation flags.  This call is equivalent to png_write_info(),
 followed the set of transformations indicated by the transform mask,
 then png_write_image(), and finally png_write_end().
@@ -2266,7 +2300,7 @@ point to libpng-allocated storage with the following function:
 
     png_free_data(png_ptr, info_ptr, mask, seq)
     mask  - identifies data to be freed, a mask
-            containing the logical OR of one or
+            containing the bitwise OR of one or
             more of
               PNG_FREE_PLTE, PNG_FREE_TRNS,
               PNG_FREE_HIST, PNG_FREE_ICCP,
@@ -2338,17 +2372,13 @@ For a more compact example of writing a PNG image, see the file example.c.
 
 V. Modifying/Customizing libpng:
 
-There are three issues here.  The first is changing how libpng does
+There are two issues here.  The first is changing how libpng does
 standard things like memory allocation, input/output, and error handling.
 The second deals with more complicated things like adding new chunks,
 adding new transformations, and generally changing how libpng works.
 Both of those are compile-time issues; that is, they are generally
 determined at the time the code is written, and there is rarely a need
-to provide the user with a means of changing them.  The third is a
-run-time issue:  choosing between and/or tuning one or more alternate
-versions of computationally intensive routines; specifically, optimized
-assembly-language (and therefore compiler- and platform-dependent)
-versions.
+to provide the user with a means of changing them.
 
 Memory allocation, input/output, and error handling
 
@@ -2380,6 +2410,9 @@ Your malloc_fn() must return NULL in case of failure.  The png_malloc()
 function will normally call png_error() if it receives a NULL from the
 system memory allocator or from your replacement malloc_fn().
 
+Your free_fn() will never be called with a NULL ptr, since libpng's
+png_free() checks for NULL before calling free_fn().
+
 Input/Output in libpng is done through png_read() and png_write(),
 which currently just call fread() and fwrite().  The FILE * is stored in
 png_struct and is initialized via png_init_io().  If you wish to change
@@ -2459,7 +2492,7 @@ Custom chunks
 If you need to read or write custom chunks, you may need to get deeper
 into the libpng code.  The library now has mechanisms for storing
 and writing chunks of unknown type; you can even declare callbacks
-for custom chunks.  Hoewver, this may not be good enough if the
+for custom chunks.  However, this may not be good enough if the
 library code itself needs to know about interactions between your
 chunk and existing `intrinsic' chunks.
 
@@ -2709,125 +2742,6 @@ When PNG_DEBUG = 1, the macros are defined, but only png_debug statements
 having level = 0 will be printed.  There aren't any such statements in
 this version of libpng, but if you insert some they will be printed.
 
-VI.  Runtime optimization
-
-A new feature in libpng 1.2.0 is the ability to dynamically switch between
-standard and optimized versions of some routines.  Currently these are
-limited to three computationally intensive tasks when reading PNG files:
-decoding row filters, expanding interlacing, and combining interlaced or
-transparent row data with previous row data.  Currently the optimized
-versions are available only for x86 (Intel, AMD, etc.) platforms with
-MMX support, though this may change in future versions.  (For example,
-the non-MMX assembler optimizations for zlib might become similarly
-runtime-selectable in future releases, in which case libpng could be
-extended to support them.  Alternatively, the compile-time choice of
-floating-point versus integer routines for gamma correction might become
-runtime-selectable.)
-
-Because such optimizations tend to be very platform- and compiler-dependent,
-both in how they are written and in how they perform, the new runtime code
-in libpng has been written to allow programs to query, enable, and disable
-either specific optimizations or all such optimizations.  For example, to
-enable all possible optimizations (bearing in mind that some "optimizations"
-may actually run more slowly in rare cases):
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       png_uint_32 mask, flags;
-
-       flags = png_get_asm_flags(png_ptr);
-       mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
-       png_set_asm_flags(png_ptr, flags | mask);
-    #endif
-
-To enable only optimizations relevant to reading PNGs, use PNG_SELECT_READ
-by itself when calling png_get_asm_flagmask(); similarly for optimizing
-only writing.  To disable all optimizations:
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       flags = png_get_asm_flags(png_ptr);
-       mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
-       png_set_asm_flags(png_ptr, flags & ~mask);
-    #endif
-
-To enable or disable only MMX-related features, use png_get_mmx_flagmask()
-in place of png_get_asm_flagmask().  The mmx version takes one additional
-parameter:
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       int selection = PNG_SELECT_READ | PNG_SELECT_WRITE;
-       int compilerID;
-
-       mask = png_get_mmx_flagmask(selection, &compilerID);
-    #endif
-
-On return, compilerID will indicate which version of the MMX assembler
-optimizations was compiled.  Currently two flavors exist:  Microsoft
-Visual C++ (compilerID == 1) and GNU C (a.k.a. gcc/gas, compilerID == 2).
-On non-x86 platforms or on systems compiled without MMX optimizations, a
-value of -1 is used.
-
-Note that both png_get_asm_flagmask() and png_get_mmx_flagmask() return
-all valid, settable optimization bits for the version of the library that's
-currently in use.  In the case of shared (dynamically linked) libraries,
-this may include optimizations that did not exist at the time the code was
-written and compiled.  It is also possible, of course, to enable only known,
-specific optimizations; for example:
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       flags = PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
-             | PNG_ASM_FLAG_MMX_READ_INTERLACE    \
-             | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
-             | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
-             | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
-             | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
-       png_set_asm_flags(png_ptr, flags);
-    #endif
-
-This method would enable only the MMX read-optimizations available at the
-time of libpng 1.2.0's release, regardless of whether a later version of
-the DLL were actually being used.  (Also note that these functions did not
-exist in versions older than 1.2.0, so any attempt to run a dynamically
-linked app on such an older version would fail.)
-
-To determine whether the processor supports MMX instructions at all, use
-the png_mmx_support() function:
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       mmxsupport = png_mmx_support();
-    #endif
-
-It returns -1 if MMX support is not compiled into libpng, 0 if MMX code
-is compiled but MMX is not supported by the processor, or 1 if MMX support
-is fully available.  Note that png_mmx_support(), png_get_mmx_flagmask(),
-and png_get_asm_flagmask() all may be called without allocating and ini-
-tializing any PNG structures (for example, as part of a usage screen or
-"about" box).
-
-The following code can be used to prevent an application from using the
-thread_unsafe features, even if libpng was built with PNG_THREAD_UNSAFE_OK
-defined:
-
-#if defined(PNG_USE_PNGGCCRD) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) \
-  && defined(PNG_THREAD_UNSAFE_OK)
-    /* Disable thread-unsafe features of pnggccrd */
-    if (png_access_version() >= 10200)
-    {
-      png_uint_32 mmx_disable_mask = 0;
-      png_uint_32 asm_flags;
-
-      mmx_disable_mask |= ( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
-                          | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
-                          | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
-                          | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH );
-      asm_flags = png_get_asm_flags(png_ptr);
-      png_set_asm_flags(png_ptr, asm_flags & ~mmx_disable_mask);
-    }
-#endif
-
-For more extensive examples of runtime querying, enabling and disabling
-of optimized features, see contrib/gregbook/readpng2.c in the libpng
-source-code distribution.
-
 VII.  MNG support
 
 The MNG specification (available at http://www.libpng.org/pub/mng) allows
@@ -2836,12 +2750,12 @@ Libpng can support some of these extensions.  To enable them, use the
 png_permit_mng_features() function:
 
    feature_set = png_permit_mng_features(png_ptr, mask)
-   mask is a png_uint_32 containing the logical OR of the
+   mask is a png_uint_32 containing the bitwise OR of the
         features you want to enable.  These include
         PNG_FLAG_MNG_EMPTY_PLTE
         PNG_FLAG_MNG_FILTER_64
         PNG_ALL_MNG_FEATURES
-   feature_set is a png_uint_32 that is the logical AND of
+   feature_set is a png_uint_32 that is the bitwise AND of
       your mask with the set of MNG features that is
       supported by the version of libpng that you are using.
 
@@ -2853,7 +2767,7 @@ or any other MNG chunks; your application must provide its own support for
 them.  You may wish to consider using libmng (available at
 http://www.libmng.com) instead.
 
-VIII.  Changes to Libpng from version 0.88
+VII.  Changes to Libpng from version 0.88
 
 It should be noted that versions of libpng later than 0.96 are not
 distributed by the original libpng author, Guy Schalnat, nor by
@@ -2902,15 +2816,15 @@ application:
 
    png_uint_32 application_vn = PNG_LIBPNG_VER;
 
-IX. Y2K Compliance in libpng
+VIII. Y2K Compliance in libpng
 
-December 3, 2004
+February 12, 2009
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.2.8 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.43rc01 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that

libpng.3

@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "December 3, 2004"
+.TH LIBPNG 3 "February 12, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.8
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.43rc01
 .SH SYNOPSIS
 \fI\fB
 
@@ -176,6 +176,14 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.2.8
 
 \fI\fB
 
+\fB#if \fI!defined(PNG_1_0_X)
+
+\fBpng_int_32 png_get_int_32 (png_bytep \fIbuf\fP\fB);\fP
+
+\fI\fB#endif
+
+\fI\fB
+
 \fBpng_byte png_get_interlace_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
 \fI\fB
@@ -258,6 +266,22 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.2.8
 
 \fI\fB
 
+\fB#if \fI!defined(PNG_1_0_X)
+
+\fBpng_uint_16 png_get_uint_16 (png_bytep \fIbuf\fP\fB);\fP
+
+\fI\fB
+
+\fBpng_uint_32 png_get_uint_31 (png_bytep \fIbuf\fP\fB);\fP
+
+\fI\fB
+
+\fBpng_uint_32 png_get_uint_32 (png_bytep \fIbuf\fP\fB);\fP
+
+\fI\fB#endif
+
+\fI\fB
+
 \fBpng_uint_32 png_get_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkpp \fIunknowns\fP\fB);\fP
 
 \fI\fB
@@ -404,6 +428,18 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.2.8
 
 \fB#if \fI!defined(PNG_1_0_X)
 
+\fBpng_save_int_32 (png_bytep \fP\fIbuf\fP\fB, png_int_32 \fIi\fP\fB);\fP
+
+\fI\fB
+
+\fBvoid png_save_uint_16 (png_bytep \fP\fIbuf\fP\fB, unsigned int \fIi\fP\fB);\fP
+
+\fI\fB
+
+\fBvoid png_save_uint_32 (png_bytep \fP\fIbuf\fP\fB, png_uint_32 \fIi\fP\fB);\fP
+
+\fI\fB
+
 \fBvoid png_set_add_alpha (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int \fIflags\fP\fB);\fP
 
 \fI\fB#endif
@@ -466,6 +502,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.2.8
 
 \fI\fB
 
+\fBvoid png_set_expand_gray_1_2_4_to_8(png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
 \fBvoid png_set_filler (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int \fIflags\fP\fB);\fP
 
 \fI\fB
@@ -781,14 +821,18 @@ Following is a copy of the libpng.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.8 - December 3, 2004
+ libpng version 1.0.43rc01 - February 12, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
- Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ Copyright (c) 1998-2008 Glenn Randers-Pehrson
  For conditions of distribution and use, see copyright
  notice in png.h.
 
- based on:
+ Based on:
+
+ libpng versions 0.97, January 1998, through 1.0.43rc01 - February 12, 2009
+ Updated and distributed by Glenn Randers-Pehrson
+ Copyright (c) 1998-2008 Glenn Randers-Pehrson
 
  libpng 1.0 beta 6  version 0.96 May 28, 1997
  Updated and distributed by Andreas Dilger
@@ -814,6 +858,10 @@ it is heavily commented and should include everything most people
 will need.  We assume that libpng is already installed; see the
 INSTALL file for instructions on how to install libpng.
 
+For examples of libpng usage, see the files "example.c", "pngtest.c",
+and the files in the "contrib" directory, all of which are included in the
+libpng distribution.
+
 Libpng was written as a companion to the PNG specification, as a way
 of reducing the amount of time and effort it takes to support the PNG
 file format in application programs.
@@ -824,12 +872,14 @@ a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2003 (E)) at
 The W3C and ISO documents have identical technical content.
 
 The PNG-1.2 specification is available at
-<http://www.libpng.org/pub/png/documents/>
+<http://www.libpng.org/pub/png/documents/>.  It is technically equivalent
+to the PNG specification (second edition) but has some additional material.
 
 The PNG-1.0 specification is available
 as RFC 2083 <http://www.libpng.org/pub/png/documents/> and as a
-W3C Recommendation <http://www.w3.org/TR/REC.png.html>. Some
-additional chunks are described in the special-purpose public chunks
+W3C Recommendation <http://www.w3.org/TR/REC.png.html>.
+
+Some additional chunks are described in the special-purpose public chunks
 documents at <http://www.libpng.org/pub/png/documents/>.
 
 Other information
@@ -863,9 +913,7 @@ Libpng is thread safe, provided the threads are using different
 instances of the structures.  Each thread should have its own
 png_struct and png_info instances, and thus its own image.
 Libpng does not protect itself against two threads using the
-same instance of a structure.  Note: thread safety may be defeated
-by use of some of the MMX assembler code in pnggccrd.c, which is only
-compiled when the user defines PNG_THREAD_UNSAFE_OK.
+same instance of a structure.
 
 .SH II. Structures
 
@@ -1039,15 +1087,19 @@ input stream. You must supply the function
          png_unknown_chunkp chunk);
     {
        /* The unknown chunk structure contains your
-          chunk data: */
+          chunk data, along with similar data for any other
+          unknown chunks: */
+
            png_byte name[5];
            png_byte *data;
            png_size_t size;
+
        /* Note that libpng has already taken care of
           the CRC handling */
 
-       /* put your code here.  Return one of the
-          following: */
+       /* put your code here.  Search for your chunk in the
+          unknown chunk structure, process it, and return one
+          of the following: */
 
        return (-n); /* chunk had an error */
        return (0); /* did not recognize */
@@ -1067,6 +1119,11 @@ you can retrieve with
 
     png_get_user_chunk_ptr(png_ptr);
 
+If you call the png_set_read_user_chunk_fn() function, then all unknown
+chunks will be saved when read, in case your callback function will need
+one or more of them.  This behavior can be changed with the
+png_set_keep_unknown_chunks() function, described below.
+
 At this point, you can set up a callback function that will be
 called after each row has been read, which you can use to control
 a progress meter or the like.  It's demonstrated in pngtest.c.
@@ -1084,40 +1141,19 @@ To inform libpng about your function, use
 
     png_set_read_status_fn(png_ptr, read_row_callback);
 
-.SS Width and height limits
-
-The PNG specification allows the width and height of an image to be as
-large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
-Since very few applications really need to process such large images,
-we have imposed an arbitrary 1-million limit on rows and columns.
-Larger images will be rejected immediately with a png_error() call. If
-you wish to override this limit, you can use
-
-   png_set_user_limits(png_ptr, width_max, height_max);
-
-to set your own limits, or use width_max = height_max = 0x7fffffffL
-to allow all valid dimensions (libpng may reject some very large images
-anyway because of potential buffer overflow conditions).
-
-You should put this statement after you create the PNG structure and
-before calling png_read_info(), png_read_png(), or png_process_data().
-If you need to retrieve the limits that are being applied, use
-
-   width_max = png_get_user_width_max(png_ptr);
-   height_max = png_get_user_height_max(png_ptr);
-
 .SS Unknown-chunk handling
 
 Now you get to set the way the library processes unknown chunks in the
 input PNG stream. Both known and unknown chunks will be read.  Normal
 behavior is that known chunks will be parsed into information in
-various info_ptr members; unknown chunks will be discarded. To change
-this, you can call:
+various info_ptr members while unknown chunks will be discarded. This
+behavior can be wasteful if your application will never use some known
+chunk types. To change this, you can call:
 
     png_set_keep_unknown_chunks(png_ptr, keep,
         chunk_list, num_chunks);
-    keep       - 0: do not handle as unknown
-                 1: do not keep
+    keep       - 0: default unknown chunk handling
+                 1: ignore; do not keep
                  2: keep only if safe-to-copy
                  3: keep even if unsafe-to-copy
                You can use these definitions:
@@ -1140,6 +1176,37 @@ instances of png_set_keep_unknown_chunks(), the final instance will
 take precedence.  The IHDR and IEND chunks should not be named in
 chunk_list; if they are, libpng will process them normally anyway.
 
+Here is an example of the usage of png_set_keep_unknown_chunks(),
+where the private "vpAg" chunk will later be processed by a user chunk
+callback function:
+
+    png_byte vpAg[5]={118, 112,  65, 103, (png_byte) '\0'};
+
+    #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+      png_byte unused_chunks[]=
+      {
+        104,  73,  83,  84, (png_byte) '\0',   /* hIST */
+        105,  84,  88, 116, (png_byte) '\0',   /* iTXt */
+        112,  67,  65,  76, (png_byte) '\0',   /* pCAL */
+        115,  67,  65,  76, (png_byte) '\0',   /* sCAL */
+        115,  80,  76,  84, (png_byte) '\0',   /* sPLT */
+        116,  73,  77,  69, (png_byte) '\0',   /* tIME */
+      };
+    #endif
+
+    ...
+
+    #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+      /* ignore all unknown chunks: */
+      png_set_keep_unknown_chunks(read_ptr, 1, NULL, 0);
+      /* except for vpAg: */
+      png_set_keep_unknown_chunks(read_ptr, 2, vpAg, 1);
+      /* also ignore unused known chunks: */
+      png_set_keep_unknown_chunks(read_ptr, 1, unused_chunks,
+         (int)sizeof(unused_chunks)/5);
+    #endif
+
+
 .SS The high-level read interface
 
 At this point there are two ways to proceed; through the high-level
@@ -1173,7 +1240,7 @@ dithering, and setting filler.)  If this is the case, simply do this:
 
     png_read_png(png_ptr, info_ptr, png_transforms, NULL)
 
-where png_transforms is an integer containing the logical OR of
+where png_transforms is an integer containing the bitwise OR of
 some set of transformation flags.  This call is equivalent to png_read_info(),
 followed the set of transformations indicated by the transform mask,
 then png_read_image(), and finally png_read_end().
@@ -1204,6 +1271,8 @@ row_pointers prior to calling png_read_png() with
          "Image is too wide to process in memory");
    row_pointers = png_malloc(png_ptr,
       height*png_sizeof(png_bytep));
+   for (int i=0; i<height, i++)
+      row_pointers[i]=NULL;  /* security precaution */
    for (int i=0; i<height, i++)
       row_pointers[i]=png_malloc(png_ptr,
          width*pixel_size);
@@ -1548,7 +1617,7 @@ unless the library has been told to transform it into another format.
 For example, 4 bit/pixel paletted or grayscale data will be returned
 2 pixels/byte with the leftmost pixel in the high-order bits of the
 byte, unless png_set_packing() is called.  8-bit RGB data will be stored
-in RGB RGB RGB format unless png_set_filler() or png_set_add_alpha()
+in RGB RGB RGB format unless png_set_filler()
 is called to insert filler bytes, either before or after each RGB triplet.
 16-bit RGB data will be returned RRGGBB RRGGBB, with the most significant
 byte of the color value first, unless png_set_strip_16() is called to
@@ -1556,7 +1625,7 @@ transform it to regular RGB RGB triplets, or png_set_filler() or
 png_set_add alpha() is called to insert filler bytes, either before or
 after each RRGGBB triplet.  Similarly, 8-bit or 16-bit grayscale data can
 be modified with
-png_set_filler(), png_set_add_alpha(), or png_set_strip_16().
+png_set_filler() or png_set_strip_16().
 
 The following code transforms grayscale images of less than 8 to 8 bits,
 changes paletted images to RGB, and adds a full alpha channel if there is
@@ -1578,6 +1647,7 @@ in libpng version 1.0.4, with the function names expanded to improve code
 readability.  In some future version they may actually do different
 things.
 
+
 PNG can have files with 16 bits per channel.  If you only can handle
 8 bits per channel, this will strip the pixels down to 8 bit.
 
@@ -1641,16 +1711,7 @@ does not affect images that already have full alpha channels.  To add an
 opaque alpha channel, use filler=0xff or 0xffff and PNG_FILLER_AFTER which
 will generate RGBA pixels.
 
-Note that png_set_filler() does not change the color type.  If you want
-to do that, you can add a true alpha channel with
-
-    if (color_type == PNG_COLOR_TYPE_RGB ||
            color_type == PNG_COLOR_TYPE_GRAY)
-    png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER);
-
-where "filler" contains the alpha value to assign to each pixel.
-This function was added in libpng-1.2.7.
-
 If you are reading an image with an alpha channel, and you need the
 data as ARGB instead of the normal PNG format RGBA:
 
@@ -2029,8 +2090,8 @@ the second parameter NULL.
 
 .SS Finishing a sequential read
 
-After you are finished reading the image through either the high- or
-low-level interfaces, you can finish reading the file.  If you are
+After you are finished reading the image through the
+low-level interface, you can finish reading the file.  If you are
 interested in comments or time, which may be stored either before or
 after the image data, you should pass the separate png_info struct if
 you want to keep the comments from before and after the image
@@ -2048,7 +2109,7 @@ point to libpng-allocated storage with the following function:
 
     png_free_data(png_ptr, info_ptr, mask, seq)
     mask - identifies data to be freed, a mask
-           containing the logical OR of one or
+           containing the bitwise OR of one or
            more of
              PNG_FREE_PLTE, PNG_FREE_TRNS,
              PNG_FREE_HIST, PNG_FREE_ICCP,
@@ -2110,7 +2171,7 @@ application instead of by libpng, you can use
 
     png_set_invalid(png_ptr, info_ptr, mask);
     mask - identifies the chunks to be made invalid,
-           containing the logical OR of one or
+           containing the bitwise OR of one or
            more of
              PNG_INFO_gAMA, PNG_INFO_sBIT,
              PNG_INFO_cHRM, PNG_INFO_PLTE,
@@ -2377,6 +2438,14 @@ Libpng section below.
 
     png_init_io(png_ptr, fp);
 
+If you are embedding your PNG into a datastream such as MNG, and don't
+want libpng to write the 8-byte signature, or if you have already
+written the signature in your application, use
+
+    png_set_sig_bytes(png_ptr, 8);
+
+to inform libpng that it should not write a signature.
+
 .SS Write callbacks
 
 At this point, you can set up a callback function that will be
@@ -2414,7 +2483,7 @@ types.
 
     /* turn on or off filtering, and/or choose
        specific filters.  You can use either a single
-       PNG_FILTER_VALUE_NAME or the logical OR of one
+       PNG_FILTER_VALUE_NAME or the bitwise OR of one
        or more PNG_FILTER_NAME masks. */
     png_set_filter(png_ptr, 0,
        PNG_FILTER_NONE  | PNG_FILTER_VALUE_NONE |
@@ -2509,6 +2578,11 @@ Some of the more important parts of the png_info are:
                      can also be
                      PNG_INTRAPIXEL_DIFFERENCING)
 
+If you call png_set_IHDR(), the call must appear before any of the
+other png_set_*() functions, which might require access to some of
+the IHDR settings.  The remaining png_set_*() functions can be called
+in any order.
+
     png_set_PLTE(png_ptr, info_ptr, palette,
        num_palette);
     palette        - the palette for the file
@@ -2787,7 +2861,7 @@ png_set_rows() to put image data in the info structure), simply do this:
 
     png_write_png(png_ptr, info_ptr, png_transforms, NULL)
 
-where png_transforms is an integer containing the logical OR of some set of
+where png_transforms is an integer containing the bitwise OR of some set of
 transformation flags.  This call is equivalent to png_write_info(),
 followed the set of transformations indicated by the transform mask,
 then png_write_image(), and finally png_write_end().
@@ -3047,7 +3121,7 @@ point to libpng-allocated storage with the following function:
 
     png_free_data(png_ptr, info_ptr, mask, seq)
     mask  - identifies data to be freed, a mask
-            containing the logical OR of one or
+            containing the bitwise OR of one or
             more of
               PNG_FREE_PLTE, PNG_FREE_TRNS,
               PNG_FREE_HIST, PNG_FREE_ICCP,
@@ -3119,17 +3193,13 @@ For a more compact example of writing a PNG image, see the file example.c.
 
 .SH V. Modifying/Customizing libpng:
 
-There are three issues here.  The first is changing how libpng does
+There are two issues here.  The first is changing how libpng does
 standard things like memory allocation, input/output, and error handling.
 The second deals with more complicated things like adding new chunks,
 adding new transformations, and generally changing how libpng works.
 Both of those are compile-time issues; that is, they are generally
 determined at the time the code is written, and there is rarely a need
-to provide the user with a means of changing them.  The third is a
-run-time issue:  choosing between and/or tuning one or more alternate
-versions of computationally intensive routines; specifically, optimized
-assembly-language (and therefore compiler- and platform-dependent)
-versions.
+to provide the user with a means of changing them.
 
 Memory allocation, input/output, and error handling
 
@@ -3161,6 +3231,9 @@ Your malloc_fn() must return NULL in case of failure.  The png_malloc()
 function will normally call png_error() if it receives a NULL from the
 system memory allocator or from your replacement malloc_fn().
 
+Your free_fn() will never be called with a NULL ptr, since libpng's
+png_free() checks for NULL before calling free_fn().
+
 Input/Output in libpng is done through png_read() and png_write(),
 which currently just call fread() and fwrite().  The FILE * is stored in
 png_struct and is initialized via png_init_io().  If you wish to change
@@ -3240,7 +3313,7 @@ to use the "cexcept" facility (see http://cexcept.sourceforge.net).
 If you need to read or write custom chunks, you may need to get deeper
 into the libpng code.  The library now has mechanisms for storing
 and writing chunks of unknown type; you can even declare callbacks
-for custom chunks.  Hoewver, this may not be good enough if the
+for custom chunks.  However, this may not be good enough if the
 library code itself needs to know about interactions between your
 chunk and existing `intrinsic' chunks.
 
@@ -3490,125 +3563,6 @@ When PNG_DEBUG = 1, the macros are defined, but only png_debug statements
 having level = 0 will be printed.  There aren't any such statements in
 this version of libpng, but if you insert some they will be printed.
 
-.SH VI.  Runtime optimization
-
-A new feature in libpng 1.2.0 is the ability to dynamically switch between
-standard and optimized versions of some routines.  Currently these are
-limited to three computationally intensive tasks when reading PNG files:
-decoding row filters, expanding interlacing, and combining interlaced or
-transparent row data with previous row data.  Currently the optimized
-versions are available only for x86 (Intel, AMD, etc.) platforms with
-MMX support, though this may change in future versions.  (For example,
-the non-MMX assembler optimizations for zlib might become similarly
-runtime-selectable in future releases, in which case libpng could be
-extended to support them.  Alternatively, the compile-time choice of
-floating-point versus integer routines for gamma correction might become
-runtime-selectable.)
-
-Because such optimizations tend to be very platform- and compiler-dependent,
-both in how they are written and in how they perform, the new runtime code
-in libpng has been written to allow programs to query, enable, and disable
-either specific optimizations or all such optimizations.  For example, to
-enable all possible optimizations (bearing in mind that some "optimizations"
-may actually run more slowly in rare cases):
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       png_uint_32 mask, flags;
-
-       flags = png_get_asm_flags(png_ptr);
-       mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
-       png_set_asm_flags(png_ptr, flags | mask);
-    #endif
-
-To enable only optimizations relevant to reading PNGs, use PNG_SELECT_READ
-by itself when calling png_get_asm_flagmask(); similarly for optimizing
-only writing.  To disable all optimizations:
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       flags = png_get_asm_flags(png_ptr);
-       mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
-       png_set_asm_flags(png_ptr, flags & ~mask);
-    #endif
-
-To enable or disable only MMX-related features, use png_get_mmx_flagmask()
-in place of png_get_asm_flagmask().  The mmx version takes one additional
-parameter:
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       int selection = PNG_SELECT_READ | PNG_SELECT_WRITE;
-       int compilerID;
-
-       mask = png_get_mmx_flagmask(selection, &compilerID);
-    #endif
-
-On return, compilerID will indicate which version of the MMX assembler
-optimizations was compiled.  Currently two flavors exist:  Microsoft
-Visual C++ (compilerID == 1) and GNU C (a.k.a. gcc/gas, compilerID == 2).
-On non-x86 platforms or on systems compiled without MMX optimizations, a
-value of -1 is used.
-
-Note that both png_get_asm_flagmask() and png_get_mmx_flagmask() return
-all valid, settable optimization bits for the version of the library that's
-currently in use.  In the case of shared (dynamically linked) libraries,
-this may include optimizations that did not exist at the time the code was
-written and compiled.  It is also possible, of course, to enable only known,
-specific optimizations; for example:
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       flags = PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
-             | PNG_ASM_FLAG_MMX_READ_INTERLACE    \
-             | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
-             | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
-             | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
-             | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
-       png_set_asm_flags(png_ptr, flags);
-    #endif
-
-This method would enable only the MMX read-optimizations available at the
-time of libpng 1.2.0's release, regardless of whether a later version of
-the DLL were actually being used.  (Also note that these functions did not
-exist in versions older than 1.2.0, so any attempt to run a dynamically
-linked app on such an older version would fail.)
-
-To determine whether the processor supports MMX instructions at all, use
-the png_mmx_support() function:
-
-    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
-       mmxsupport = png_mmx_support();
-    #endif
-
-It returns -1 if MMX support is not compiled into libpng, 0 if MMX code
-is compiled but MMX is not supported by the processor, or 1 if MMX support
-is fully available.  Note that png_mmx_support(), png_get_mmx_flagmask(),
-and png_get_asm_flagmask() all may be called without allocating and ini-
-tializing any PNG structures (for example, as part of a usage screen or
-"about" box).
-
-The following code can be used to prevent an application from using the
-thread_unsafe features, even if libpng was built with PNG_THREAD_UNSAFE_OK
-defined:
-
-#if defined(PNG_USE_PNGGCCRD) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) \
-  && defined(PNG_THREAD_UNSAFE_OK)
-    /* Disable thread-unsafe features of pnggccrd */
-    if (png_access_version() >= 10200)
-    {
-      png_uint_32 mmx_disable_mask = 0;
-      png_uint_32 asm_flags;
-
-      mmx_disable_mask |= ( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
-                          | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
-                          | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
-                          | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH );
-      asm_flags = png_get_asm_flags(png_ptr);
-      png_set_asm_flags(png_ptr, asm_flags & ~mmx_disable_mask);
-    }
-#endif
-
-For more extensive examples of runtime querying, enabling and disabling
-of optimized features, see contrib/gregbook/readpng2.c in the libpng
-source-code distribution.
-
 .SH VII.  MNG support
 
 The MNG specification (available at http://www.libpng.org/pub/mng) allows
@@ -3617,12 +3571,12 @@ Libpng can support some of these extensions.  To enable them, use the
 png_permit_mng_features() function:
 
    feature_set = png_permit_mng_features(png_ptr, mask)
-   mask is a png_uint_32 containing the logical OR of the
+   mask is a png_uint_32 containing the bitwise OR of the
         features you want to enable.  These include
         PNG_FLAG_MNG_EMPTY_PLTE
         PNG_FLAG_MNG_FILTER_64
         PNG_ALL_MNG_FEATURES
-   feature_set is a png_uint_32 that is the logical AND of
+   feature_set is a png_uint_32 that is the bitwise AND of
       your mask with the set of MNG features that is
       supported by the version of libpng that you are using.
 
@@ -3634,7 +3588,7 @@ or any other MNG chunks; your application must provide its own support for
 them.  You may wish to consider using libmng (available at
 http://www.libmng.com) instead.
 
-.SH VIII.  Changes to Libpng from version 0.88
+.SH VII.  Changes to Libpng from version 0.88
 
 It should be noted that versions of libpng later than 0.96 are not
 distributed by the original libpng author, Guy Schalnat, nor by
@@ -3683,15 +3637,15 @@ application:
 
    png_uint_32 application_vn = PNG_LIBPNG_VER;
 
-.SH IX. Y2K Compliance in libpng
+.SH VIII. Y2K Compliance in libpng
 
-December 3, 2004
+February 12, 2009
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.2.8 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.43rc01 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
@@ -3835,15 +3789,122 @@ the first widely used release:
  1.0.16              10    10016  10.so.0.1.0.16
  1.2.6               13    10206  12.so.0.1.2.6
  1.2.7beta1-2        13    10207  12.so.0.1.2.7beta1-2
- 1.0.17rc1           10    10017  12.so.0.1.0.17rc1
+ 1.0.17rc1           10    10017  10.so.0.1.0.17rc1
  1.2.7rc1            13    10207  12.so.0.1.2.7rc1
- 1.0.17              10    10017  12.so.0.1.0.17
+ 1.0.17              10    10017  10.so.0.1.0.17
  1.2.7               13    10207  12.so.0.1.2.7
  1.2.8beta1-5        13    10208  12.so.0.1.2.8beta1-5
- 1.0.18rc1-5         10    10018  12.so.0.1.0.18rc1-5
+ 1.0.18rc1-5         10    10018  10.so.0.1.0.18rc1-5
  1.2.8rc1-5          13    10208  12.so.0.1.2.8rc1-5
- 1.0.18              10    10018  12.so.0.1.0.18
+ 1.0.18              10    10018  10.so.0.1.0.18
  1.2.8               13    10208  12.so.0.1.2.8
+ 1.2.9beta1-3        13    10209  12.so.0.1.2.9beta1-3
+ 1.2.9beta4-11       13    10209  12.so.0.9[.0]
+ 1.2.9rc1            13    10209  12.so.0.9[.0]
+ 1.2.9               13    10209  12.so.0.9[.0]
+ 1.2.10beta1-8       13    10210  12.so.0.10[.0]
+ 1.2.10rc1-3         13    10210  12.so.0.10[.0]
+ 1.2.10              13    10210  12.so.0.10[.0]
+ 1.2.11beta1-4       13    10211  12.so.0.11[.0]
+ 1.0.19rc1-5         10    10019  10.so.0.19[.0]
+ 1.2.11rc1-5         13    10211  12.so.0.11[.0]
+ 1.0.19              10    10019  10.so.0.19[.0]
+ 1.2.11              13    10211  12.so.0.11[.0]
+ 1.0.20              10    10020  10.so.0.20[.0]
+ 1.2.12              13    10212  12.so.0.12[.0]
+ 1.2.13beta1         13    10213  12.so.0.13[.0]
+ 1.0.21              10    10021  10.so.0.21[.0]
+ 1.2.13              13    10213  12.so.0.13[.0]
+ 1.2.14beta1-2       13    10214  12.so.0.14[.0]
+ 1.0.22rc1           10    10022  10.so.0.22[.0]
+ 1.2.14rc1           13    10214  12.so.0.14[.0]
+ 1.2.15beta1-6       13    10215  12.so.0.15[.0]
+ 1.0.23rc1-5         10    10023  10.so.0.23[.0]
+ 1.2.15rc1-5         13    10215  12.so.0.15[.0]
+ 1.0.23              10    10023  10.so.0.23[.0]
+ 1.2.15              13    10215  12.so.0.15[.0]
+ 1.2.16beta1-2       13    10216  12.so.0.16[.0]
+ 1.2.16rc1           13    10216  12.so.0.16[.0]
+ 1.0.24              10    10024  10.so.0.24[.0]
+ 1.2.16              13    10216  12.so.0.16[.0]
+ 1.2.17beta1-2       13    10217  12.so.0.17[.0]
+ 1.0.25rc1           10    10025  10.so.0.25[.0]
+ 1.2.17rc1-3         13    10217  12.so.0.17[.0]
+ 1.0.25              10    10025  10.so.0.25[.0]
+ 1.2.17              13    10217  12.so.0.17[.0]
+ 1.0.26              10    10026  10.so.0.26[.0]
+ 1.2.18              13    10218  12.so.0.18[.0]
+ 1.2.19beta1-31      13    10219  12.so.0.19[.0]
+ 1.0.27rc1-6         10    10027  10.so.0.27[.0]
+ 1.2.19rc1-6         13    10219  12.so.0.19[.0]
+ 1.0.27              10    10027  10.so.0.27[.0]
+ 1.2.19              13    10219  12.so.0.19[.0]
+ 1.2.20beta01-04     13    10220  12.so.0.20[.0]
+ 1.0.28rc1-6         10    10028  10.so.0.28[.0]
+ 1.2.20rc1-6         13    10220  12.so.0.20[.0]
+ 1.0.28              10    10028  10.so.0.28[.0]
+ 1.2.20              13    10220  12.so.0.20[.0]
+ 1.2.21beta1-2       13    10221  12.so.0.21[.0]
+ 1.2.21rc1-3         13    10221  12.so.0.21[.0]
+ 1.0.29              10    10029  10.so.0.29[.0]
+ 1.2.21              13    10221  12.so.0.21[.0]
+ 1.2.22beta1-4       13    10222  12.so.0.22[.0]
+ 1.0.30rc1           13    10030  10.so.0.30[.0]
+ 1.2.22rc1           13    10222  12.so.0.22[.0]
+ 1.0.30              10    10030  10.so.0.30[.0]
+ 1.2.22              13    10222  12.so.0.22[.0]
+ 1.2.23beta01-05     13    10223  12.so.0.23[.0]
+ 1.2.23rc01          13    10223  12.so.0.23[.0]
+ 1.2.23              13    10223  12.so.0.23[.0]
+ 1.2.24beta01-02     13    10224  12.so.0.24[.0]
+ 1.2.24rc01          13    10224  12.so.0.24[.0]
+ 1.2.24              13    10224  12.so.0.24[.0]
+ 1.2.25beta01-06     13    10225  12.so.0.25[.0]
+ 1.2.25rc01-02       13    10225  12.so.0.25[.0]
+ 1.0.31              10    10031  10.so.0.31[.0]
+ 1.2.25              13    10225  12.so.0.25[.0]
+ 1.2.26beta01-06     13    10226  12.so.0.26[.0]
+ 1.2.26rc01          13    10226  12.so.0.26[.0]
+ 1.2.26              13    10226  12.so.0.26[.0]
+ 1.0.32              10    10032  10.so.0.32[.0]
+ 1.2.27beta01-06     13    10227  12.so.0.27[.0]
+ 1.2.27rc01          13    10227  12.so.0.27[.0]
+ 1.0.33              10    10033  10.so.0.33[.0]
+ 1.2.27              13    10227  12.so.0.27[.0]
+ 1.0.34              10    10034  10.so.0.34[.0]
+ 1.2.28              13    10228  12.so.0.28[.0]
+ 1.2.29beta01-03     13    10229  12.so.0.29[.0]
+ 1.2.29rc01          13    10229  12.so.0.29[.0]
+ 1.0.35              10    10035  10.so.0.35[.0]
+ 1.2.29              13    10229  12.so.0.29[.0]
+ 1.0.37              10    10037  10.so.0.37[.0]
+ 1.2.30beta01-04     13    10230  12.so.0.30[.0]
+ 1.0.38rc01-08       10    10038  10.so.0.38[.0]
+ 1.2.30rc01-08       13    10230  12.so.0.30[.0]
+ 1.0.38              10    10038  10.so.0.38[.0]
+ 1.2.30              13    10230  12.so.0.30[.0]
+ 1.0.39rc01-03       10    10039  10.so.0.39[.0]
+ 1.2.31rc01-03       13    10231  12.so.0.31[.0]
+ 1.0.39              10    10039  10.so.0.39[.0]
+ 1.2.31              13    10231  12.so.0.31[.0]
+ 1.2.32beta01-02     13    10232  12.so.0.32[.0]
+ 1.0.40rc01          10    10040  10.so.0.40[.0]
+ 1.2.32rc01          13    10232  12.so.0.32[.0]
+ 1.0.40              10    10040  10.so.0.40[.0]
+ 1.2.32              13    10232  12.so.0.32[.0]
+ 1.2.33beta01-02     13    10233  12.so.0.33[.0]
+ 1.2.33rc01-02       13    10233  12.so.0.33[.0]
+ 1.0.41rc01          10    10041  10.so.0.41[.0]
+ 1.2.33              13    10233  12.so.0.33[.0]
+ 1.0.41              10    10041  10.so.0.41[.0]
+ 1.2.34beta01-07     13    10234  12.so.0.34[.0]
+ 1.0.42rc01          10    10042  10.so.0.42[.0]
+ 1.2.34rc01          13    10234  12.so.0.34[.0]
+ 1.0.42              10    10042  10.so.0.42[.0]
+ 1.2.34              13    10234  12.so.0.34[.0]
+ 1.2.35beta01-03     13    10235  12.so.0.35[.0]
+ 1.0.43rc01          10    10043  10.so.0.43[.0]
+ 1.2.35rc01          13    10235  12.so.0.35[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -3856,7 +3917,7 @@ version 1.0.6j; from then on they were given the upcoming public
 release number plus "betaNN" or "rcN".
 
 .SH "SEE ALSO"
-libpngpf(3), png(5)
+.IR libpngpf(3) ", " png(5)
 .LP
 .IR libpng :
 .IP
@@ -3879,7 +3940,7 @@ ftp://ftp.info-zip.org/pub/infozip/zlib
 .I libpng
 or at
 .br
-ftp://ds.internic.net/rfc/rfc2083.txt
+ftp://ftp.rfc-editor.org:/in-notes/rfc2083.txt
 .br
 or (as a W3C Recommendation) at
 .br
@@ -3899,14 +3960,17 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.2.8 - December 3, 2004:
+Libpng version 1.0.43rc01 - February 12, 2009:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
 Supported by the PNG development group
 .br
-png-implement at ccrc.wustl.edu (subscription required; write to
-majordomo at ccrc.wustl.edu with "subscribe png-implement" in the message).
+png-mng-implement at lists.sf.net
+(subscription required; visit
+png-mng-implement at lists.sourceforge.net (subscription required; visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe).
 
 .SH COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
 
@@ -3917,8 +3981,8 @@ included in the libpng distribution, the latter shall prevail.)
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng version 1.2.6, December 3, 2004, is
-Copyright (c) 2004 Glenn Randers-Pehrson, and is
+libpng versions 1.2.6, August 15, 2004, through 1.0.43rc01, February 12, 2009, are
+Copyright (c) 2004,2006-2008 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
 
@@ -4016,7 +4080,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-December 3, 2004
+February 12, 2009
 
 .\" end of man page
 

missing

@@ -1,6 +1,10 @@
 #! /bin/sh
 # Common stub for a few missing GNU programs while installing.
-# Copyright (C) 1996, 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
+
+scriptversion=2006-05-10.23
+
+# Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006
+#   Free Software Foundation, Inc.
 # Originally by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
 
 # This program is free software; you can redistribute it and/or modify
@@ -15,8 +19,8 @@
 
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
 
 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
@@ -29,6 +33,8 @@ if test $# -eq 0; then
 fi
 
 run=:
+sed_output='s/.* --output[ =]\([^ ]*\).*/\1/p'
+sed_minuso='s/.* -o \([^ ]*\).*/\1/p'
 
 # In the cases where this matters, `missing' is being run in the
 # srcdir already.
@@ -38,18 +44,24 @@ else
   configure_ac=configure.in
 fi
 
-case "$1" in
+msg="missing on your system"
+
+case $1 in
 --run)
   # Try to run requested program, and just exit if it succeeds.
   run=
   shift
   "$@" && exit 0
+  # Exit code 63 means version mismatch.  This often happens
+  # when the user try to use an ancient version of a tool on
+  # a file that requires a minimum version.  In this case we
+  # we should proceed has if the program had been absent, or
+  # if --run hadn't been passed.
+  if test $? = 63; then
+    run=:
+    msg="probably too old"
+  fi
   ;;
-esac
-
-# If it does not exist, or fails to run (possibly an outdated version),
-# try to emulate it.
-case "$1" in
 
   -h|--h|--he|--hel|--help)
     echo "\
@@ -67,6 +79,7 @@ Supported PROGRAM values:
   aclocal      touch file \`aclocal.m4'
   autoconf     touch file \`configure'
   autoheader   touch file \`config.h.in'
+  autom4te     touch the output file, or create a stub one
   automake     touch all \`Makefile.in' files
   bison        create \`y.tab.[ch]', if possible, from existing .[ch]
   flex         create \`lex.yy.c', if possible, from existing .c
@@ -74,11 +87,15 @@ Supported PROGRAM values:
   lex          create \`lex.yy.c', if possible, from existing .c
   makeinfo     touch the output file
   tar          try tar, gnutar, gtar, then tar without non-portable flags
-  yacc         create \`y.tab.[ch]', if possible, from existing .[ch]"
+  yacc         create \`y.tab.[ch]', if possible, from existing .[ch]
+
+Send bug reports to <bug-automake@gnu.org>."
+    exit $?
     ;;
 
   -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
-    echo "missing 0.4 - GNU automake"
+    echo "missing $scriptversion (GNU Automake)"
+    exit $?
     ;;
 
   -*)
@@ -87,14 +104,44 @@ Supported PROGRAM values:
     exit 1
     ;;
 
-  aclocal*)
+esac
+
+# Now exit if we have it, but it failed.  Also exit now if we
+# don't have it and --version was passed (most likely to detect
+# the program).
+case $1 in
+  lex|yacc)
+    # Not GNU programs, they don't have --version.
+    ;;
+
+  tar)
+    if test -n "$run"; then
+       echo 1>&2 "ERROR: \`tar' requires --run"
+       exit 1
+    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
+       exit 1
+    fi
+    ;;
+
+  *)
     if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
        # We have it, but it failed.
        exit 1
+    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
+       # Could not run --version or --help.  This is probably someone
+       # running `$TOOL --version' or `$TOOL --help' to check whether
+       # $TOOL exists and not knowing $TOOL uses missing.
+       exit 1
     fi
+    ;;
+esac
 
+# If it does not exist, or fails to run (possibly an outdated version),
+# try to emulate it.
+case $1 in
+  aclocal*)
     echo 1>&2 "\
-WARNING: \`$1' is missing on your system.  You should only need it if
+WARNING: \`$1' is $msg.  You should only need it if
          you modified \`acinclude.m4' or \`${configure_ac}'.  You might want
          to install the \`Automake' and \`Perl' packages.  Grab them from
          any GNU archive site."
@@ -102,13 +149,8 @@ WARNING: \`$1' is missing on your system.  You should only need it if
     ;;
 
   autoconf)
-    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
-       # We have it, but it failed.
-       exit 1
-    fi
-
     echo 1>&2 "\
-WARNING: \`$1' is missing on your system.  You should only need it if
+WARNING: \`$1' is $msg.  You should only need it if
          you modified \`${configure_ac}'.  You might want to install the
          \`Autoconf' and \`GNU m4' packages.  Grab them from any GNU
          archive site."
@@ -116,13 +158,8 @@ WARNING: \`$1' is missing on your system.  You should only need it if
     ;;
 
   autoheader)
-    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
-       # We have it, but it failed.
-       exit 1
-    fi
-
     echo 1>&2 "\
-WARNING: \`$1' is missing on your system.  You should only need it if
+WARNING: \`$1' is $msg.  You should only need it if
          you modified \`acconfig.h' or \`${configure_ac}'.  You might want
          to install the \`Autoconf' and \`GNU m4' packages.  Grab them
          from any GNU archive site."
@@ -130,7 +167,7 @@ WARNING: \`$1' is missing on your system.  You should only need it if
     test -z "$files" && files="config.h"
     touch_files=
     for f in $files; do
-      case "$f" in
+      case $f in
       *:*) touch_files="$touch_files "`echo "$f" |
 				       sed -e 's/^[^:]*://' -e 's/:.*//'`;;
       *) touch_files="$touch_files $f.in";;
@@ -140,13 +177,8 @@ WARNING: \`$1' is missing on your system.  You should only need it if
     ;;
 
   automake*)
-    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
-       # We have it, but it failed.
-       exit 1
-    fi
-
     echo 1>&2 "\
-WARNING: \`$1' is missing on your system.  You should only need it if
+WARNING: \`$1' is $msg.  You should only need it if
          you modified \`Makefile.am', \`acinclude.m4' or \`${configure_ac}'.
          You might want to install the \`Automake' and \`Perl' packages.
          Grab them from any GNU archive site."
@@ -156,20 +188,15 @@ WARNING: \`$1' is missing on your system.  You should only need it if
     ;;
 
   autom4te)
-    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
-       # We have it, but it failed.
-       exit 1
-    fi
-
     echo 1>&2 "\
-WARNING: \`$1' is needed, and you do not seem to have it handy on your
-         system.  You might have modified some files without having the
+WARNING: \`$1' is needed, but is $msg.
+         You might have modified some files without having the
          proper tools for further handling them.
-         You can get \`$1Help2man' as part of \`Autoconf' from any GNU
+         You can get \`$1' as part of \`Autoconf' from any GNU
          archive site."
 
-    file=`echo "$*" | sed -n 's/.*--output[ =]*\([^ ]*\).*/\1/p'`
-    test -z "$file" && file=`echo "$*" | sed -n 's/.*-o[ ]*\([^ ]*\).*/\1/p'`
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
     if test -f "$file"; then
 	touch $file
     else
@@ -185,74 +212,67 @@ WARNING: \`$1' is needed, and you do not seem to have it handy on your
 
   bison|yacc)
     echo 1>&2 "\
-WARNING: \`$1' is missing on your system.  You should only need it if
+WARNING: \`$1' $msg.  You should only need it if
          you modified a \`.y' file.  You may need the \`Bison' package
          in order for those modifications to take effect.  You can get
          \`Bison' from any GNU archive site."
     rm -f y.tab.c y.tab.h
-    if [ $# -ne 1 ]; then
+    if test $# -ne 1; then
         eval LASTARG="\${$#}"
-	case "$LASTARG" in
+	case $LASTARG in
 	*.y)
 	    SRCFILE=`echo "$LASTARG" | sed 's/y$/c/'`
-	    if [ -f "$SRCFILE" ]; then
+	    if test -f "$SRCFILE"; then
 	         cp "$SRCFILE" y.tab.c
 	    fi
 	    SRCFILE=`echo "$LASTARG" | sed 's/y$/h/'`
-	    if [ -f "$SRCFILE" ]; then
+	    if test -f "$SRCFILE"; then
 	         cp "$SRCFILE" y.tab.h
 	    fi
 	  ;;
 	esac
     fi
-    if [ ! -f y.tab.h ]; then
+    if test ! -f y.tab.h; then
 	echo >y.tab.h
     fi
-    if [ ! -f y.tab.c ]; then
+    if test ! -f y.tab.c; then
 	echo 'main() { return 0; }' >y.tab.c
     fi
     ;;
 
   lex|flex)
     echo 1>&2 "\
-WARNING: \`$1' is missing on your system.  You should only need it if
+WARNING: \`$1' is $msg.  You should only need it if
          you modified a \`.l' file.  You may need the \`Flex' package
          in order for those modifications to take effect.  You can get
          \`Flex' from any GNU archive site."
     rm -f lex.yy.c
-    if [ $# -ne 1 ]; then
+    if test $# -ne 1; then
         eval LASTARG="\${$#}"
-	case "$LASTARG" in
+	case $LASTARG in
 	*.l)
 	    SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'`
-	    if [ -f "$SRCFILE" ]; then
+	    if test -f "$SRCFILE"; then
 	         cp "$SRCFILE" lex.yy.c
 	    fi
 	  ;;
 	esac
     fi
-    if [ ! -f lex.yy.c ]; then
+    if test ! -f lex.yy.c; then
 	echo 'main() { return 0; }' >lex.yy.c
     fi
     ;;
 
   help2man)
-    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
-       # We have it, but it failed.
-       exit 1
-    fi
-
     echo 1>&2 "\
-WARNING: \`$1' is missing on your system.  You should only need it if
+WARNING: \`$1' is $msg.  You should only need it if
 	 you modified a dependency of a manual page.  You may need the
 	 \`Help2man' package in order for those modifications to take
 	 effect.  You can get \`Help2man' from any GNU archive site."
 
-    file=`echo "$*" | sed -n 's/.*-o \([^ ]*\).*/\1/p'`
-    if test -z "$file"; then
-	file=`echo "$*" | sed -n 's/.*--output=\([^ ]*\).*/\1/p'`
-    fi
-    if [ -f "$file" ]; then
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
+    if test -f "$file"; then
 	touch $file
     else
 	test -z "$file" || exec >$file
@@ -262,32 +282,36 @@ WARNING: \`$1' is missing on your system.  You should only need it if
     ;;
 
   makeinfo)
-    if test -z "$run" && (makeinfo --version) > /dev/null 2>&1; then
-       # We have makeinfo, but it failed.
-       exit 1
-    fi
-
     echo 1>&2 "\
-WARNING: \`$1' is missing on your system.  You should only need it if
+WARNING: \`$1' is $msg.  You should only need it if
          you modified a \`.texi' or \`.texinfo' file, or any other file
          indirectly affecting the aspect of the manual.  The spurious
          call might also be the consequence of using a buggy \`make' (AIX,
          DU, IRIX).  You might want to install the \`Texinfo' package or
          the \`GNU make' package.  Grab either from any GNU archive site."
-    file=`echo "$*" | sed -n 's/.*-o \([^ ]*\).*/\1/p'`
+    # The file to touch is that specified with -o ...
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
     if test -z "$file"; then
-      file=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'`
-      file=`sed -n '/^@setfilename/ { s/.* \([^ ]*\) *$/\1/; p; q; }' $file`
+      # ... or it is the one specified with @setfilename ...
+      infile=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'`
+      file=`sed -n '
+	/^@setfilename/{
+	  s/.* \([^ ]*\) *$/\1/
+	  p
+	  q
+	}' $infile`
+      # ... or it is derived from the source name (dir/f.texi becomes f.info)
+      test -z "$file" && file=`echo "$infile" | sed 's,.*/,,;s,.[^.]*$,,'`.info
     fi
+    # If the file does not exist, the user really needs makeinfo;
+    # let's fail without touching anything.
+    test -f $file || exit 1
     touch $file
     ;;
 
   tar)
     shift
-    if test -n "$run"; then
-      echo 1>&2 "ERROR: \`tar' requires --run"
-      exit 1
-    fi
 
     # We have already tried tar in the generic part.
     # Look for gnutar/gtar before invocation to avoid ugly error
@@ -300,13 +324,13 @@ WARNING: \`$1' is missing on your system.  You should only need it if
     fi
     firstarg="$1"
     if shift; then
-	case "$firstarg" in
+	case $firstarg in
 	*o*)
 	    firstarg=`echo "$firstarg" | sed s/o//`
 	    tar "$firstarg" "$@" && exit 0
 	    ;;
 	esac
-	case "$firstarg" in
+	case $firstarg in
 	*h*)
 	    firstarg=`echo "$firstarg" | sed s/h//`
 	    tar "$firstarg" "$@" && exit 0
@@ -323,10 +347,10 @@ WARNING: I can't seem to be able to run \`tar' with the given arguments.
 
   *)
     echo 1>&2 "\
-WARNING: \`$1' is needed, and you do not seem to have it handy on your
-         system.  You might have modified some files without having the
+WARNING: \`$1' is needed, and is $msg.
+         You might have modified some files without having the
          proper tools for further handling them.  Check the \`README' file,
-         it often tells you about the needed prerequirements for installing
+         it often tells you about the needed prerequisites for installing
          this package.  You may also peek at any GNU archive site, in case
          some other package would contain this missing \`$1' program."
     exit 1
@@ -334,3 +358,10 @@ WARNING: \`$1' is needed, and you do not seem to have it handy on your
 esac
 
 exit 0
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-end: "$"
+# End:

mkinstalldirs

@@ -1,21 +1,36 @@
 #! /bin/sh
 # mkinstalldirs --- make directory hierarchy
-# Author: Noah Friedman <friedman@prep.ai.mit.edu>
-# Created: 1993-05-16
-# Public domain
 
+scriptversion=2006-05-11.19
+
+# Original author: Noah Friedman <friedman@prep.ai.mit.edu>
+# Created: 1993-05-16
+# Public domain.
+#
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+nl='
+'
+IFS=" ""	$nl"
 errstatus=0
-dirmode=""
+dirmode=
 
 usage="\
-Usage: mkinstalldirs [-h] [--help] [-m mode] dir ..."
+Usage: mkinstalldirs [-h] [--help] [--version] [-m MODE] DIR ...
+
+Create each directory DIR (with mode MODE, if specified), including all
+leading file name components.
+
+Report bugs to <bug-automake@gnu.org>."
 
 # process command line arguments
 while test $# -gt 0 ; do
   case $1 in
     -h | --help | --h*)         # -h for help
-      echo "$usage" 1>&2
-      exit 0
+      echo "$usage"
+      exit $?
       ;;
     -m)                         # -m PERM arg
       shift
@@ -23,6 +38,10 @@ while test $# -gt 0 ; do
       dirmode=$1
       shift
       ;;
+    --version)
+      echo "$0 $scriptversion"
+      exit $?
+      ;;
     --)                         # stop option processing
       shift
       break
@@ -50,30 +69,58 @@ case $# in
   0) exit 0 ;;
 esac
 
+# Solaris 8's mkdir -p isn't thread-safe.  If you mkdir -p a/b and
+# mkdir -p a/c at the same time, both will detect that a is missing,
+# one will create a, then the other will try to create a and die with
+# a "File exists" error.  This is a problem when calling mkinstalldirs
+# from a parallel make.  We use --version in the probe to restrict
+# ourselves to GNU mkdir, which is thread-safe.
 case $dirmode in
   '')
-    if mkdir -p -- . 2>/dev/null; then
+    if mkdir -p --version . >/dev/null 2>&1 && test ! -d ./--version; then
       echo "mkdir -p -- $*"
       exec mkdir -p -- "$@"
+    else
+      # On NextStep and OpenStep, the `mkdir' command does not
+      # recognize any option.  It will interpret all options as
+      # directories to create, and then abort because `.' already
+      # exists.
+      test -d ./-p && rmdir ./-p
+      test -d ./--version && rmdir ./--version
     fi
     ;;
   *)
-    if mkdir -m "$dirmode" -p -- . 2>/dev/null; then
+    if mkdir -m "$dirmode" -p --version . >/dev/null 2>&1 &&
+       test ! -d ./--version; then
       echo "mkdir -m $dirmode -p -- $*"
       exec mkdir -m "$dirmode" -p -- "$@"
+    else
+      # Clean up after NextStep and OpenStep mkdir.
+      for d in ./-m ./-p ./--version "./$dirmode";
+      do
+        test -d $d && rmdir $d
+      done
     fi
     ;;
 esac
 
 for file
 do
-  set fnord `echo ":$file" | sed -ne 's/^:\//#/;s/^://;s/\// /g;s/^#/\//;p'`
+  case $file in
+    /*) pathcomp=/ ;;
+    *)  pathcomp= ;;
+  esac
+  oIFS=$IFS
+  IFS=/
+  set fnord $file
   shift
+  IFS=$oIFS
 
-  pathcomp=
   for d
   do
-    pathcomp="$pathcomp$d"
+    test "x$d" = x && continue
+
+    pathcomp=$pathcomp$d
     case $pathcomp in
       -*) pathcomp=./$pathcomp ;;
     esac
@@ -84,21 +131,21 @@ do
       mkdir "$pathcomp" || lasterr=$?
 
       if test ! -d "$pathcomp"; then
-  	errstatus=$lasterr
+	errstatus=$lasterr
       else
-  	if test ! -z "$dirmode"; then
+	if test ! -z "$dirmode"; then
 	  echo "chmod $dirmode $pathcomp"
-    	  lasterr=""
-  	  chmod "$dirmode" "$pathcomp" || lasterr=$?
+	  lasterr=
+	  chmod "$dirmode" "$pathcomp" || lasterr=$?
 
-  	  if test ! -z "$lasterr"; then
-  	    errstatus=$lasterr
-  	  fi
-  	fi
+	  if test ! -z "$lasterr"; then
+	    errstatus=$lasterr
+	  fi
+	fi
       fi
     fi
 
-    pathcomp="$pathcomp/"
+    pathcomp=$pathcomp/
   done
 done
 
@@ -107,5 +154,8 @@ exit $errstatus
 # Local Variables:
 # mode: shell-script
 # sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-end: "$"
 # End:
-# mkinstalldirs ends here

png.5

@@ -1,4 +1,4 @@
-.TH PNG 5 "December 3, 2004"
+.TH PNG 5 "February 12, 2009"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
@@ -18,7 +18,7 @@ gamma and chromaticity data for improved color matching on heterogeneous
 platforms.
 
 .SH "SEE ALSO"
-.IR libpng(3), zlib(3), deflate(5), and zlib(5)
+.IR libpng(3) ", " zlib(3) ", " deflate(5) ", and " zlib(5)
 .LP
 PNG specification (second edition), November 2003:
 .IP
@@ -35,7 +35,7 @@ PNG 1.0 specification, October 1996:
 RFC 2083
 .IP
 .br
-ftp://ds.internic.net/rfc/rfc2083.txt
+ftp://ftp.rfc-editor.org:/in-notes/rfc2083.txt
 .br
 or (as a W3C Recommendation) at
 .br
@@ -58,7 +58,7 @@ Thomas Boutell and others (png-list).
 
 .SH COPYRIGHT NOTICE
 .LP
-This man page is Copyright (c) 1998-2004 Glenn Randers-Pehrson.  See png.h
+This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson.  See png.h
 for conditions of use and distribution.
 .LP
 The PNG Specification (Second Edition) is

png.c

@@ -1,9 +1,9 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * libpng version 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.34 [December 18, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  */
@@ -13,18 +13,21 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_8 Your_png_h_is_not_version_1_2_8;
+typedef version_1_0_43rc01 Your_png_h_is_not_version_1_0_43rc01;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
 
 #ifdef PNG_USE_GLOBAL_ARRAYS
 /* png_libpng_ver was changed to a function in version 1.0.5c */
-const char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING;
+PNG_CONST char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING;
+
+#ifdef PNG_READ_SUPPORTED
 
 /* png_sig was changed to a function in version 1.0.5c */
 /* Place to hold the signature string for a PNG file. */
-const png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+PNG_CONST png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+#endif /* PNG_READ_SUPPORTED */
 
 /* Invoke global declarations for constant strings for known chunk types */
 PNG_IHDR;
@@ -49,37 +52,34 @@ PNG_tIME;
 PNG_tRNS;
 PNG_zTXt;
 
+#ifdef PNG_READ_SUPPORTED
 /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
 
 /* start of interlace block */
-const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
+PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
 
 /* offset to next interlace block */
-const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
+PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
 
 /* start of interlace block in the y direction */
-const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
+PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
 
 /* offset to next interlace block in the y direction */
-const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
-
-/* width of interlace block (used in assembler routines only) */
-#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
-const int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-#endif
+PNG_CONST int FARDATA 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
-const int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
+PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
 */
 
 /* Mask to determine which pixels are valid in a pass */
-const int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
+PNG_CONST int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
 
 /* Mask to determine which pixels to overwrite while displaying */
-const int FARDATA png_pass_dsp_mask[]
+PNG_CONST int FARDATA png_pass_dsp_mask[]
    = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
 
+#endif /* PNG_READ_SUPPORTED */
 #endif /* PNG_USE_GLOBAL_ARRAYS */
 
 /* Tells libpng that we have already handled the first "num_bytes" bytes
@@ -88,10 +88,12 @@ const int FARDATA png_pass_dsp_mask[]
  * or write any of the magic bytes before it starts on the IHDR.
  */
 
+#ifdef PNG_READ_SUPPORTED
 void PNGAPI
 png_set_sig_bytes(png_structp png_ptr, int num_bytes)
 {
-   png_debug(1, "in png_set_sig_bytes\n");
+   if (png_ptr == NULL) return;
+   png_debug(1, "in png_set_sig_bytes");
    if (num_bytes > 8)
       png_error(png_ptr, "Too many bytes for PNG signature.");
 
@@ -113,10 +115,10 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
    if (num_to_check > 8)
       num_to_check = 8;
    else if (num_to_check < 1)
-      return (0);
+      return (-1);
 
    if (start > 7)
-      return (0);
+      return (-1);
 
    if (start + num_to_check > 8)
       num_to_check = 8 - start;
@@ -124,16 +126,20 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
    return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
 }
 
+#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
 /* (Obsolete) function to check signature bytes.  It does not allow one
  * to check a partial signature.  This function might be removed in the
- * future - use png_sig_cmp().  Returns true (nonzero) if the file is a PNG.
+ * future - use png_sig_cmp().  Returns true (nonzero) if the file is PNG.
  */
 int PNGAPI
 png_check_sig(png_bytep sig, int num)
 {
   return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
 }
+#endif
+#endif /* PNG_READ_SUPPORTED */
 
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 /* Function to allocate memory for zlib and clear it to 0. */
 #ifdef PNG_1_0_X
 voidpf PNGAPI
@@ -143,13 +149,14 @@ voidpf /* private */
 png_zalloc(voidpf png_ptr, uInt items, uInt size)
 {
    png_voidp ptr;
-   png_structp p=png_ptr;
+   png_structp p=(png_structp)png_ptr;
    png_uint_32 save_flags=p->flags;
    png_uint_32 num_bytes;
 
+   if (png_ptr == NULL) return (NULL);
    if (items > PNG_UINT_32_MAX/size)
    {
-     png_warning (png_ptr, "Potential overflow in png_zalloc()");
+     png_warning (p, "Potential overflow in png_zalloc()");
      return (NULL);
    }
    num_bytes = (png_uint_32)items * size;
@@ -233,8 +240,8 @@ png_create_info_struct(png_structp png_ptr)
 {
    png_infop info_ptr;
 
-   png_debug(1, "in png_create_info_struct\n");
-   if(png_ptr == NULL) return (NULL);
+   png_debug(1, "in png_create_info_struct");
+   if (png_ptr == NULL) return (NULL);
 #ifdef PNG_USER_MEM_SUPPORTED
    info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
       png_ptr->malloc_fn, png_ptr->mem_ptr);
@@ -256,8 +263,9 @@ void PNGAPI
 png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
 {
    png_infop info_ptr = NULL;
+   if (png_ptr == NULL) return;
 
-   png_debug(1, "in png_destroy_info_struct\n");
+   png_debug(1, "in png_destroy_info_struct");
    if (info_ptr_ptr != NULL)
       info_ptr = *info_ptr_ptr;
 
@@ -279,7 +287,7 @@ png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
  * and applications using it are urged to use png_create_info_struct()
  * instead.
  */
-#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
+#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
 #undef png_info_init
 void PNGAPI
 png_info_init(png_infop info_ptr)
@@ -294,9 +302,11 @@ png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
 {
    png_infop info_ptr = *ptr_ptr;
 
-   png_debug(1, "in png_info_init_3\n");
+   if (info_ptr == NULL) return;
 
-   if(png_sizeof(png_info) > png_info_struct_size)
+   png_debug(1, "in png_info_init_3");
+
+   if (png_sizeof(png_info) > png_info_struct_size)
      {
        png_destroy_struct(info_ptr);
        info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
@@ -304,7 +314,7 @@ png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
      }
 
    /* set everything to 0 */
-   png_memset(info_ptr, 0, png_sizeof (png_info));
+   png_memset(info_ptr, 0, png_sizeof(png_info));
 }
 
 #ifdef PNG_FREE_ME_SUPPORTED
@@ -312,12 +322,12 @@ void PNGAPI
 png_data_freer(png_structp png_ptr, png_infop info_ptr,
    int freer, png_uint_32 mask)
 {
-   png_debug(1, "in png_data_freer\n");
+   png_debug(1, "in png_data_freer");
    if (png_ptr == NULL || info_ptr == NULL)
       return;
-   if(freer == PNG_DESTROY_WILL_FREE_DATA)
+   if (freer == PNG_DESTROY_WILL_FREE_DATA)
       info_ptr->free_me |= mask;
-   else if(freer == PNG_USER_WILL_FREE_DATA)
+   else if (freer == PNG_USER_WILL_FREE_DATA)
       info_ptr->free_me &= ~mask;
    else
       png_warning(png_ptr,
@@ -329,7 +339,7 @@ void PNGAPI
 png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
    int num)
 {
-   png_debug(1, "in png_free_data\n");
+   png_debug(1, "in png_free_data");
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -370,11 +380,11 @@ if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
 #endif
 {
     png_free(png_ptr, info_ptr->trans);
+    info_ptr->trans = NULL;
     info_ptr->valid &= ~PNG_INFO_tRNS;
 #ifndef PNG_FREE_ME_SUPPORTED
     png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
 #endif
-    info_ptr->trans = NULL;
 }
 #endif
 
@@ -449,7 +459,7 @@ if (mask & PNG_FREE_SPLT)
 {
    if (num != -1)
    {
-      if(info_ptr->splt_palettes)
+      if (info_ptr->splt_palettes)
       {
           png_free(png_ptr, info_ptr->splt_palettes[num].name);
           png_free(png_ptr, info_ptr->splt_palettes[num].entries);
@@ -459,7 +469,7 @@ if (mask & PNG_FREE_SPLT)
    }
    else
    {
-       if(info_ptr->splt_palettes_num)
+       if (info_ptr->splt_palettes_num)
        {
          int i;
          for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
@@ -475,6 +485,12 @@ if (mask & PNG_FREE_SPLT)
 #endif
 
 #if defined(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;
+  }
+
 #ifdef PNG_FREE_ME_SUPPORTED
 if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
 #else
@@ -483,7 +499,7 @@ if (mask & PNG_FREE_UNKN)
 {
    if (num != -1)
    {
-       if(info_ptr->unknown_chunks)
+       if (info_ptr->unknown_chunks)
        {
           png_free(png_ptr, info_ptr->unknown_chunks[num].data);
           info_ptr->unknown_chunks[num].data = NULL;
@@ -493,7 +509,7 @@ if (mask & PNG_FREE_UNKN)
    {
        int i;
 
-       if(info_ptr->unknown_chunks_num)
+       if (info_ptr->unknown_chunks_num)
        {
          for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
             png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
@@ -547,7 +563,7 @@ if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
 if (mask & PNG_FREE_ROWS)
 #endif
 {
-    if(info_ptr->row_pointers)
+    if (info_ptr->row_pointers)
     {
        int row;
        for (row = 0; row < (int)info_ptr->height; row++)
@@ -563,7 +579,7 @@ if (mask & PNG_FREE_ROWS)
 #endif
 
 #ifdef PNG_FREE_ME_SUPPORTED
-   if(num == -1)
+   if (num == -1)
      info_ptr->free_me &= ~mask;
    else
      info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
@@ -577,7 +593,7 @@ if (mask & PNG_FREE_ROWS)
 void /* PRIVATE */
 png_info_destroy(png_structp png_ptr, png_infop info_ptr)
 {
-   png_debug(1, "in png_info_destroy\n");
+   png_debug(1, "in png_info_destroy");
 
    png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
 
@@ -586,12 +602,13 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
    {
        png_free(png_ptr, png_ptr->chunk_list);
        png_ptr->chunk_list=NULL;
-       png_ptr->num_chunk_list=0;
+       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
@@ -600,9 +617,11 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
 png_voidp PNGAPI
 png_get_io_ptr(png_structp png_ptr)
 {
+   if (png_ptr == NULL) return (NULL);
    return (png_ptr->io_ptr);
 }
 
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 #if !defined(PNG_NO_STDIO)
 /* Initialize the default input/output functions for the PNG file.  If you
  * use your own read or write routines, you can call either png_set_read_fn()
@@ -613,7 +632,8 @@ png_get_io_ptr(png_structp png_ptr)
 void PNGAPI
 png_init_io(png_structp png_ptr, png_FILE_p fp)
 {
-   png_debug(1, "in png_init_io\n");
+   png_debug(1, "in png_init_io");
+   if (png_ptr == NULL) return;
    png_ptr->io_ptr = (png_voidp)fp;
 }
 #endif
@@ -629,6 +649,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
         {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
          "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
 
+   if (png_ptr == NULL) return (NULL);
    if (png_ptr->time_buffer == NULL)
    {
       png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
@@ -649,7 +670,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
 #ifdef USE_FAR_KEYWORD
    {
       char near_time_buf[29];
-      sprintf(near_time_buf, "%d %s %d %02d:%02d:%02d +0000",
+      png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000",
           ptime->day % 32, short_months[(ptime->month - 1) % 12],
           ptime->year, ptime->hour % 24, ptime->minute % 60,
           ptime->second % 61);
@@ -657,7 +678,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
           29*png_sizeof(char));
    }
 #else
-   sprintf(png_ptr->time_buffer, "%d %s %d %02d:%02d:%02d +0000",
+   png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000",
        ptime->day % 32, short_months[(ptime->month - 1) % 12],
        ptime->year, ptime->hour % 24, ptime->minute % 60,
        ptime->second % 61);
@@ -667,24 +688,16 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
 }
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
 
-#if 0
-/* Signature string for a PNG file. */
-png_bytep PNGAPI
-png_sig_bytes(void)
-{
-   return ((png_bytep)"\211\120\116\107\015\012\032\012");
-}
-#endif
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
 
 png_charp PNGAPI
 png_get_copyright(png_structp png_ptr)
 {
-   if (&png_ptr != NULL)  /* silence compiler warning about unused png_ptr */
-   return ((png_charp) "\n libpng version 1.2.8 - December 3, 2004\n\
-   Copyright (c) 1998-2004 Glenn Randers-Pehrson\n\
+   png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
+   return ((png_charp) "\n libpng version 1.0.43rc01 - February 12, 2009\n\
+   Copyright (c) 1998-2008 Glenn Randers-Pehrson\n\
    Copyright (c) 1996-1997 Andreas Dilger\n\
    Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
-   return ((png_charp) "");
 }
 
 /* The following return the library version as a short string in the
@@ -699,29 +712,31 @@ png_charp PNGAPI
 png_get_libpng_ver(png_structp png_ptr)
 {
    /* Version of *.c files used when building libpng */
-   if (&png_ptr != NULL)  /* silence compiler warning about unused png_ptr */
-      return ((png_charp) PNG_LIBPNG_VER_STRING);
-   return ((png_charp) "");
+   png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
+   return ((png_charp) PNG_LIBPNG_VER_STRING);
 }
 
 png_charp PNGAPI
 png_get_header_ver(png_structp png_ptr)
 {
    /* Version of *.h files used when building libpng */
-   if (&png_ptr != NULL)  /* silence compiler warning about unused png_ptr */
-      return ((png_charp) PNG_LIBPNG_VER_STRING);
-   return ((png_charp) "");
+   png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
+   return ((png_charp) PNG_LIBPNG_VER_STRING);
 }
 
 png_charp PNGAPI
 png_get_header_version(png_structp png_ptr)
 {
    /* Returns longer string containing both version and date */
-   if (&png_ptr != NULL)  /* silence compiler warning about unused png_ptr */
-      return ((png_charp) PNG_HEADER_VERSION_STRING);
-   return ((png_charp) "");
+   png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
+   return ((png_charp) PNG_HEADER_VERSION_STRING
+#ifndef PNG_READ_SUPPORTED
+   "     (NO READ SUPPORT)"
+#endif
+   "\n");
 }
 
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 int PNGAPI
 png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
@@ -729,12 +744,12 @@ png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
    /* check chunk_name and return "keep" value if it's on the list, else 0 */
    int i;
    png_bytep p;
-   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 0;
-   p=png_ptr->chunk_list+png_ptr->num_chunk_list*5-5;
-   for (i = png_ptr->num_chunk_list; i; i--, p-=5)
+   p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5;
+   for (i = png_ptr->num_chunk_list; i; i--, p -= 5)
       if (!png_memcmp(chunk_name, p, 4))
-        return ((int)*(p+4));
+        return ((int)*(p + 4));
    return 0;
 }
 #endif
@@ -743,8 +758,10 @@ png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
 int PNGAPI
 png_reset_zstream(png_structp png_ptr)
 {
+   if (png_ptr == NULL) return Z_STREAM_ERROR;
    return (inflateReset(&png_ptr->zstream));
 }
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
 
 /* This function was added to libpng-1.0.7 */
 png_uint_32 PNGAPI
@@ -755,66 +772,19 @@ png_access_version_number(void)
 }
 
 
+#if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-    /* GRR:  could add this:   && defined(PNG_MMX_CODE_SUPPORTED) */
-/* this INTERNAL function was added to libpng 1.2.0 */
-void /* PRIVATE */
-png_init_mmx_flags (png_structp png_ptr)
-{
-    png_ptr->mmx_rowbytes_threshold = 0;
-    png_ptr->mmx_bitdepth_threshold = 0;
-
-#  if (defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD))
-
-    png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_COMPILED;
-
-    if (png_mmx_support() > 0) {
-        png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
-#    ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
-                              | PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
-#    endif
-#    ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
-                              | PNG_ASM_FLAG_MMX_READ_INTERLACE
-#    endif
-#    ifndef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-                              ;
-#    else
-                              | PNG_ASM_FLAG_MMX_READ_FILTER_SUB
-                              | PNG_ASM_FLAG_MMX_READ_FILTER_UP
-                              | PNG_ASM_FLAG_MMX_READ_FILTER_AVG
-                              | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
-
-        png_ptr->mmx_rowbytes_threshold = PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT;
-        png_ptr->mmx_bitdepth_threshold = PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT;
-#    endif
-    } else {
-        png_ptr->asm_flags &= ~( PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
-                               | PNG_MMX_READ_FLAGS
-                               | PNG_MMX_WRITE_FLAGS );
-    }
-
-#  else /* !((PNGVCRD || PNGGCCRD) && PNG_ASSEMBLER_CODE_SUPPORTED)) */
-
-    /* clear all MMX flags; no support is compiled in */
-    png_ptr->asm_flags &= ~( PNG_MMX_FLAGS );
-
-#  endif /* ?(PNGVCRD || PNGGCCRD) */
-}
-
-#endif /* !(PNG_ASSEMBLER_CODE_SUPPORTED) */
-
 /* this function was added to libpng 1.2.0 */
-#if !defined(PNG_USE_PNGGCCRD) && \
-    !(defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD))
 int PNGAPI
 png_mmx_support(void)
 {
+   /* obsolete, to be removed from libpng-1.4.0 */
     return -1;
 }
-#endif
 #endif /* PNG_1_0_X */
+#endif /* PNG_READ_SUPPORTED && PNG_ASSEMBLER_CODE_SUPPORTED */
 
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 #ifdef PNG_SIZE_T
 /* Added at libpng version 1.2.6 */
    PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
@@ -826,3 +796,116 @@ png_convert_size(size_t size)
   return ((png_size_t)size);
 }
 #endif /* PNG_SIZE_T */
+
+/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */
+#if defined(PNG_cHRM_SUPPORTED)
+#if !defined(PNG_NO_CHECK_cHRM)
+/*
+ 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 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;
+}
+int /* private */
+png_check_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)
+{
+   int ret = 1;
+   unsigned long xy_hi,xy_lo,yx_hi,yx_lo;
+
+   png_debug(1, "in function png_check_cHRM_fixed");
+   if (png_ptr == NULL)
+      return 0;
+
+   if (white_x < 0 || white_y <= 0 ||
+         red_x < 0 ||   red_y <  0 ||
+       green_x < 0 || green_y <  0 ||
+        blue_x < 0 ||  blue_y <  0)
+   {
+      png_warning(png_ptr,
+        "Ignoring attempt to set negative chromaticity value");
+      ret = 0;
+   }
+   if (white_x > (png_fixed_point) PNG_UINT_31_MAX ||
+       white_y > (png_fixed_point) PNG_UINT_31_MAX ||
+         red_x > (png_fixed_point) PNG_UINT_31_MAX ||
+         red_y > (png_fixed_point) PNG_UINT_31_MAX ||
+       green_x > (png_fixed_point) PNG_UINT_31_MAX ||
+       green_y > (png_fixed_point) PNG_UINT_31_MAX ||
+        blue_x > (png_fixed_point) PNG_UINT_31_MAX ||
+        blue_y > (png_fixed_point) PNG_UINT_31_MAX )
+   {
+      png_warning(png_ptr,
+        "Ignoring attempt to set chromaticity value exceeding 21474.83");
+      ret = 0;
+   }
+   if (white_x > 100000L - white_y)
+   {
+      png_warning(png_ptr, "Invalid cHRM white point");
+      ret = 0;
+   }
+   if (red_x > 100000L - red_y)
+   {
+      png_warning(png_ptr, "Invalid cHRM red point");
+      ret = 0;
+   }
+   if (green_x > 100000L - green_y)
+   {
+      png_warning(png_ptr, "Invalid cHRM green point");
+      ret = 0;
+   }
+   if (blue_x > 100000L - blue_y)
+   {
+      png_warning(png_ptr, "Invalid cHRM blue point");
+      ret = 0;
+   }
+
+   png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo);
+   png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo);
+
+   if (xy_hi == yx_hi && xy_lo == yx_lo)
+   {
+      png_warning(png_ptr,
+         "Ignoring attempt to set cHRM RGB triangle with zero area");
+      ret = 0;
+   }
+
+   return ret;
+}
+#endif /* NO_PNG_CHECK_cHRM */
+#endif /* PNG_cHRM_SUPPORTED */
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */

png.h

@@ -1,14 +1,14 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.2.8 - December 3, 2004
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * libpng version 1.0.43rc01 - February 12, 2009
+ * Copyright (c) 1998-2009 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.)
  *
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.2.8 - December 3, 2004: Glenn
+ *  libpng versions 0.97, January 1998, through 1.0.43rc01 - February 12, 2009: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -102,15 +102,124 @@
  *    1.0.16                  10    10016  10.so.0.1.0.16
  *    1.2.6                   13    10206  12.so.0.1.2.6
  *    1.2.7beta1-2            13    10207  12.so.0.1.2.7beta1-2
- *    1.0.17rc1               10    10017  12.so.0.1.0.17rc1
+ *    1.0.17rc1               10    10017  10.so.0.1.0.17rc1
  *    1.2.7rc1                13    10207  12.so.0.1.2.7rc1
- *    1.0.17                  10    10017  12.so.0.1.0.17
+ *    1.0.17                  10    10017  10.so.0.1.0.17
  *    1.2.7                   13    10207  12.so.0.1.2.7
  *    1.2.8beta1-5            13    10208  12.so.0.1.2.8beta1-5
- *    1.0.18rc1-5             10    10018  12.so.0.1.0.18rc1-5
+ *    1.0.18rc1-5             10    10018  10.so.0.1.0.18rc1-5
  *    1.2.8rc1-5              13    10208  12.so.0.1.2.8rc1-5
- *    1.0.18                  10    10018  12.so.0.1.0.18
+ *    1.0.18                  10    10018  10.so.0.1.0.18
  *    1.2.8                   13    10208  12.so.0.1.2.8
+ *    1.2.9beta1-3            13    10209  12.so.0.1.2.9beta1-3
+ *    1.2.9beta4-11           13    10209  12.so.0.9[.0]
+ *    1.2.9rc1                13    10209  12.so.0.9[.0]
+ *    1.2.9                   13    10209  12.so.0.9[.0]
+ *    1.2.10beta1-8           13    10210  12.so.0.10[.0]
+ *    1.2.10rc1-3             13    10210  12.so.0.10[.0]
+ *    1.2.10                  13    10210  12.so.0.10[.0]
+ *    1.2.11beta1-4           13    10211  12.so.0.11[.0]
+ *    1.0.19rc1-5             10    10019  10.so.0.19[.0]
+ *    1.2.11rc1-5             13    10211  12.so.0.11[.0]
+ *    1.0.19                  10    10019  10.so.0.19[.0]
+ *    1.2.11                  13    10211  12.so.0.11[.0]
+ *    1.0.20                  10    10020  10.so.0.20[.0]
+ *    1.2.12                  13    10212  12.so.0.12[.0]
+ *    1.2.13beta1             13    10213  12.so.0.13[.0]
+ *    1.0.21                  10    10021  10.so.0.21[.0]
+ *    1.2.13                  13    10213  12.so.0.13[.0]
+ *    1.2.14beta1-2           13    10214  12.so.0.14[.0]
+ *    1.0.22rc1               10    10022  10.so.0.22[.0]
+ *    1.2.14rc1               13    10214  12.so.0.14[.0]
+ *    1.0.22                  10    10022  10.so.0.22[.0]
+ *    1.2.14                  13    10214  12.so.0.14[.0]
+ *    1.2.15beta1-6           13    10215  12.so.0.15[.0]
+ *    1.0.23rc1-5             10    10023  10.so.0.23[.0]
+ *    1.2.15rc1-5             13    10215  12.so.0.15[.0]
+ *    1.0.23                  10    10023  10.so.0.23[.0]
+ *    1.2.15                  13    10215  12.so.0.15[.0]
+ *    1.2.16beta1-2           13    10216  12.so.0.16[.0]
+ *    1.2.16rc1               13    10216  12.so.0.16[.0]
+ *    1.0.24                  10    10024  10.so.0.24[.0]
+ *    1.2.16                  13    10216  12.so.0.16[.0]
+ *    1.2.17beta1-2           13    10217  12.so.0.17[.0]
+ *    1.0.25rc1               10    10025  10.so.0.25[.0]
+ *    1.2.17rc1-3             13    10217  12.so.0.17[.0]
+ *    1.0.25                  10    10025  10.so.0.25[.0]
+ *    1.2.17                  13    10217  12.so.0.17[.0]
+ *    1.0.26                  10    10026  10.so.0.26[.0]
+ *    1.2.18                  13    10218  12.so.0.18[.0]
+ *    1.2.19beta1-31          13    10219  12.so.0.19[.0]
+ *    1.0.27rc1-6             10    10027  10.so.0.27[.0]
+ *    1.2.19rc1-6             13    10219  12.so.0.19[.0]
+ *    1.0.27                  10    10027  10.so.0.27[.0]
+ *    1.2.19                  13    10219  12.so.0.19[.0]
+ *    1.2.20beta01-04         13    10220  12.so.0.20[.0]
+ *    1.0.28rc1-6             10    10028  10.so.0.28[.0]
+ *    1.2.20rc1-6             13    10220  12.so.0.20[.0]
+ *    1.0.28                  10    10028  10.so.0.28[.0]
+ *    1.2.20                  13    10220  12.so.0.20[.0]
+ *    1.2.21beta1-2           13    10221  12.so.0.21[.0]
+ *    1.2.21rc1-3             13    10221  12.so.0.21[.0]
+ *    1.0.29                  10    10029  10.so.0.29[.0]
+ *    1.2.21                  13    10221  12.so.0.21[.0]
+ *    1.2.22beta1-4           13    10222  12.so.0.22[.0]
+ *    1.0.30rc1               10    10030  10.so.0.30[.0]
+ *    1.2.22rc1               13    10222  12.so.0.22[.0]
+ *    1.0.30                  10    10030  10.so.0.30[.0]
+ *    1.2.22                  13    10222  12.so.0.22[.0]
+ *    1.2.23beta01-05         13    10223  12.so.0.23[.0]
+ *    1.2.23rc01              13    10223  12.so.0.23[.0]
+ *    1.2.23                  13    10223  12.so.0.23[.0]
+ *    1.2.24beta01-02         13    10224  12.so.0.24[.0]
+ *    1.2.24rc01              13    10224  12.so.0.24[.0]
+ *    1.2.24                  13    10224  12.so.0.24[.0]
+ *    1.2.25beta01-06         13    10225  12.so.0.25[.0]
+ *    1.2.25rc01-02           13    10225  12.so.0.25[.0]
+ *    1.0.31                  10    10031  10.so.0.31[.0]
+ *    1.2.25                  13    10225  12.so.0.25[.0]
+ *    1.2.26beta01-06         13    10226  12.so.0.26[.0]
+ *    1.2.26rc01              13    10226  12.so.0.26[.0]
+ *    1.2.26                  13    10226  12.so.0.26[.0]
+ *    1.0.32                  10    10032  10.so.0.32[.0]
+ *    1.2.27beta01-06         13    10227  12.so.0.27[.0]
+ *    1.2.27rc01              13    10227  12.so.0.27[.0]
+ *    1.0.33                  10    10033  10.so.0.33[.0]
+ *    1.2.27                  13    10227  12.so.0.27[.0]
+ *    1.0.34                  10    10034  10.so.0.34[.0]
+ *    1.2.28                  13    10228  12.so.0.28[.0]
+ *    1.2.29beta01-03         13    10229  12.so.0.29[.0]
+ *    1.2.29rc01              13    10229  12.so.0.29[.0]
+ *    1.0.35                  10    10035  10.so.0.35[.0]
+ *    1.2.29                  13    10229  12.so.0.29[.0]
+ *    1.0.37                  10    10037  10.so.0.37[.0]
+ *    1.2.30beta01-04         13    10230  12.so.0.30[.0]
+ *    1.0.38rc01-08           10    10038  10.so.0.38[.0]
+ *    1.2.30rc01-08           13    10230  12.so.0.30[.0]
+ *    1.0.38                  10    10038  10.so.0.38[.0]
+ *    1.2.30                  13    10230  12.so.0.30[.0]
+ *    1.0.39rc01-03           10    10039  10.so.0.39[.0]
+ *    1.2.31rc01-03           13    10231  12.so.0.31[.0]
+ *    1.0.39                  10    10039  10.so.0.39[.0]
+ *    1.2.31                  13    10231  12.so.0.31[.0]
+ *    1.2.32beta01-02         13    10232  12.so.0.32[.0]
+ *    1.0.40rc01              10    10040  10.so.0.40[.0]
+ *    1.2.32rc01              13    10232  12.so.0.32[.0]
+ *    1.0.40                  10    10040  10.so.0.40[.0]
+ *    1.2.32                  13    10232  12.so.0.32[.0]
+ *    1.2.33beta01-02         13    10233  12.so.0.33[.0]
+ *    1.2.33rc01-02           13    10233  12.so.0.33[.0]
+ *    1.0.41rc01              10    10041  10.so.0.41[.0]
+ *    1.2.33                  13    10233  12.so.0.33[.0]
+ *    1.0.41                  10    10041  10.so.0.41[.0]
+ *    1.2.34beta01-07         13    10234  12.so.0.34[.0]
+ *    1.0.42rc01              10    10042  10.so.0.42[.0]
+ *    1.2.34rc01              13    10234  12.so.0.34[.0]
+ *    1.0.42                  10    10042  10.so.0.42[.0]
+ *    1.2.34                  13    10234  12.so.0.34[.0]
+ *    1.2.35beta01-03         13    10235  12.so.0.35[.0]
+ *    1.0.43rc01              10    10043  10.so.0.43[.0]
+ *    1.2.35rc01              13    10235  12.so.0.35[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -120,7 +229,7 @@
  *    to the source version x.y.z (leading zeros in y and z).  Beta versions
  *    were given the previous public release number plus a letter, until
  *    version 1.0.6j; from then on they were given the upcoming public
- *    release number plus "betaNN" or "rcN".
+ *    release number plus "betaNN" or "rcNN".
  *
  *    Binary incompatibility exists only when applications make direct access
  *    to the info_ptr or png_ptr members through png.h, and the compiled
@@ -140,8 +249,8 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.2.8, December 3, 2004, are
- * Copyright (c) 2004 Glenn Randers-Pehrson, and are
+ * libpng versions 1.2.6, August 15, 2004, through 1.0.43rc01, February 12, 2009, are
+ * Copyright (c) 2004, 2006-2008 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
  *
@@ -252,13 +361,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    December 3, 2004
+ *    February 12, 2009
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.2.8 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.0.43rc01 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -314,21 +423,21 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.8"
+#define PNG_LIBPNG_VER_STRING "1.0.43rc01"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.2.8 - December 3, 2004 (header)\n"
+   " libpng version 1.0.43rc01 - February 12, 2009\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
-#define PNG_LIBPNG_VER_DLLNUM  13
+#define PNG_LIBPNG_VER_DLLNUM  10
 
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
-#define PNG_LIBPNG_VER_MINOR   2
-#define PNG_LIBPNG_VER_RELEASE 8
+#define PNG_LIBPNG_VER_MINOR   0
+#define PNG_LIBPNG_VER_RELEASE 43
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  0
+#define PNG_LIBPNG_VER_BUILD  01
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -345,14 +454,14 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_RC
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
  * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release */
-#define PNG_LIBPNG_VER 10208 /* 1.2.8 */
+#define PNG_LIBPNG_VER 10043 /* 1.0.43 */
 
 #ifndef PNG_VERSION_INFO_ONLY
 /* include the compression library's header */
@@ -376,14 +485,14 @@
  */
 
 #if defined(PNG_USER_PRIVATEBUILD)
-#  define PNG_LIBPNG_BUILD_TYPE PNG_LIBPNG_BUILD_BASE_TYPE | \
-          PNG_LIBPNG_BUILD_PRIVATE
+#  define PNG_LIBPNG_BUILD_TYPE \
+          (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
 #else
 #  if defined(PNG_LIBPNG_SPECIALBUILD)
-#    define PNG_LIBPNG_BUILD_TYPE PNG_LIBPNG_BUILD_BASE_TYPE | \
-            PNG_LIBPNG_BUILD_SPECIAL
+#    define PNG_LIBPNG_BUILD_TYPE \
+            (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
 #  else
-#    define PNG_LIBPNG_BUILD_TYPE PNG_LIBPNG_BUILD_BASE_TYPE
+#    define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
 #  endif
 #endif
 
@@ -440,7 +549,7 @@ extern "C" {
  * the version above.
  */
 #ifdef PNG_USE_GLOBAL_ARRAYS
-PNG_EXPORT_VAR (const char) png_libpng_ver[18];
+PNG_EXPORT_VAR (PNG_CONST char) png_libpng_ver[18];
   /* need room for 99.99.99beta99z */
 #else
 #define png_libpng_ver png_get_header_ver(NULL)
@@ -449,17 +558,14 @@ PNG_EXPORT_VAR (const char) png_libpng_ver[18];
 #ifdef PNG_USE_GLOBAL_ARRAYS
 /* This was removed in version 1.0.5c */
 /* Structures to facilitate easy interlacing.  See png.c for more details */
-PNG_EXPORT_VAR (const int FARDATA) png_pass_start[7];
-PNG_EXPORT_VAR (const int FARDATA) png_pass_inc[7];
-PNG_EXPORT_VAR (const int FARDATA) png_pass_ystart[7];
-PNG_EXPORT_VAR (const int FARDATA) png_pass_yinc[7];
-PNG_EXPORT_VAR (const int FARDATA) png_pass_mask[7];
-PNG_EXPORT_VAR (const int FARDATA) png_pass_dsp_mask[7];
-#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
-PNG_EXPORT_VAR (const int FARDATA) png_pass_width[7];
-#endif
+PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_start[7];
+PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_inc[7];
+PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_ystart[7];
+PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_yinc[7];
+PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_mask[7];
+PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_dsp_mask[7];
 /* This isn't currently used.  If you need it, see png.c for more details.
-PNG_EXPORT_VAR (const int FARDATA) png_pass_height[7];
+PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_height[7];
 */
 #endif
 
@@ -596,9 +702,10 @@ typedef png_time FAR * FAR * png_timepp;
  * up private chunks for output even though the library doesn't actually
  * know about their semantics.
  */
+#define PNG_CHUNK_NAME_LENGTH 5
 typedef struct png_unknown_chunk_t
 {
-    png_byte name[5];
+    png_byte name[PNG_CHUNK_NAME_LENGTH];
     png_byte *data;
     png_size_t size;
 
@@ -894,8 +1001,10 @@ typedef png_info FAR * FAR * png_infopp;
 #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))
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 /* PNG_MAX_UINT is deprecated; use PNG_UINT_31_MAX instead. */
 #define PNG_MAX_UINT PNG_UINT_31_MAX
+#endif
 
 /* These describe the color_type field in png_info. */
 /* color type masks */
@@ -1053,7 +1162,10 @@ typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp));
 #define PNG_TRANSFORM_SWAP_ALPHA     0x0100    /* read and write */
 #define PNG_TRANSFORM_SWAP_ENDIAN    0x0200    /* read and write */
 #define PNG_TRANSFORM_INVERT_ALPHA   0x0400    /* read and write */
-#define PNG_TRANSFORM_STRIP_FILLER   0x0800    /* WRITE only */
+#define PNG_TRANSFORM_STRIP_FILLER   0x0800    /* WRITE only, deprecated */
+/* Added to libpng-1.2.34 */
+#define PNG_TRANSFORM_STRIP_FILLER_BEFORE 0x0800  /* WRITE only */
+#define PNG_TRANSFORM_STRIP_FILLER_AFTER  0x1000  /* WRITE only */
 
 /* Flags for MNG supported features */
 #define PNG_FLAG_MNG_EMPTY_PLTE     0x01
@@ -1123,10 +1235,12 @@ struct png_struct_def
    png_uint_32 row_number;    /* current row in interlace pass */
    png_bytep prev_row;        /* buffer to save previous (unfiltered) row */
    png_bytep row_buf;         /* buffer to save current (unfiltered) row */
+#ifndef PNG_NO_WRITE_FILTER
    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_row_info row_info;     /* used for transformation routines */
 
    png_uint_32 idat_size;     /* current IDAT size for read */
@@ -1228,8 +1342,7 @@ struct png_struct_def
      png_size_t current_text_left;   /* how much text left to read in input */
      png_charp current_text;         /* current text chunk buffer */
      png_charp current_text_ptr;     /* current location in current_text */
-#  endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */
-
+#  endif /* PNG_TEXT_SUPPORTED */
 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
 
 #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
@@ -1311,16 +1424,20 @@ struct png_struct_def
    png_byte filter_type;
 #endif
 
-#if defined(PNG_1_0_X) || (defined(PNG_DEBUG) && defined(PNG_USE_PNGGCCRD))
+#if defined(PNG_1_0_X)
 /* New member added in libpng-1.0.10, ifdef'ed out in 1.2.0 */
    png_uint_32 row_buf_size;
 #endif
 
 /* New members added in libpng-1.2.0 */
-#if !defined(PNG_1_0_X) && defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+#  if !defined(PNG_1_0_X)
+#    if defined(PNG_MMX_CODE_SUPPORTED)
    png_byte     mmx_bitdepth_threshold;
    png_uint_32  mmx_rowbytes_threshold;
+#    endif
    png_uint_32  asm_flags;
+#  endif
 #endif
 
 /* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
@@ -1350,13 +1467,25 @@ struct png_struct_def
    png_uint_32 user_height_max;
 #endif
 
+/* New member added in libpng-1.0.25 and 1.2.17 */
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+   /* storage for unknown chunk that the library doesn't recognize. */
+   png_unknown_chunk unknown_chunk;
+#endif
+
+/* New members added in libpng-1.2.26 */
+  png_uint_32 old_big_row_buf_size, old_prev_row_size;
+
+/* New member added in libpng-1.2.30 */
+  png_charp chunkdata;  /* buffer for reading chunk data */
+
 };
 
 
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_2_8;
+typedef png_structp version_1_0_43rc01;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -1442,11 +1571,14 @@ extern PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr));
 extern PNG_EXPORT(png_infop,png_create_info_struct)
    PNGARG((png_structp png_ptr));
 
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 /* Initialize the info structure (old interface - DEPRECATED) */
 extern PNG_EXPORT(void,png_info_init) PNGARG((png_infop info_ptr));
 #undef png_info_init
 #define png_info_init(info_ptr) png_info_init_3(&info_ptr,\
     png_sizeof(png_info));
+#endif
+
 extern PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr,
     png_size_t png_info_struct_size));
 
@@ -1483,9 +1615,16 @@ extern PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime,
 #if defined(PNG_READ_EXPAND_SUPPORTED)
 /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */
 extern PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr));
-extern PNG_EXPORT(void,png_set_gray_1_2_4_to_8) PNGARG((png_structp png_ptr));
+#if !defined(PNG_1_0_X)
+extern PNG_EXPORT(void,png_set_expand_gray_1_2_4_to_8) PNGARG((png_structp
+  png_ptr));
+#endif
 extern PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr));
 extern PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr));
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
+/* Deprecated */
+extern PNG_EXPORT(void,png_set_gray_1_2_4_to_8) PNGARG((png_structp png_ptr));
+#endif
 #endif
 
 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
@@ -1606,6 +1745,7 @@ extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr,
 #endif
 #endif
 
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
     defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
 /* Permit or disallow empty PLTE (0: not permitted, 1: permitted) */
@@ -1613,6 +1753,7 @@ extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr,
 extern PNG_EXPORT(void,png_permit_empty_plte) PNGARG((png_structp png_ptr,
    int empty_plte_permitted));
 #endif
+#endif
 
 #if defined(PNG_WRITE_FLUSH_SUPPORTED)
 /* Set how many lines between output flushes - 0 for no flushing */
@@ -1992,6 +2133,7 @@ extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr,
    int check));
 #endif /* USE_FAR_KEYWORD */
 
+#ifndef PNG_NO_ERROR_TEXT
 /* Fatal error in PNG image of libpng - can't continue */
 extern PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr,
    png_const_charp error_message));
@@ -1999,14 +2141,22 @@ extern PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr,
 /* The same, but the chunk name is prepended to the error string. */
 extern PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr,
    png_const_charp error_message));
+#else
+/* Fatal error in PNG image of libpng - can't continue */
+extern PNG_EXPORT(void,png_err) PNGARG((png_structp png_ptr));
+#endif
 
+#ifndef PNG_NO_WARNINGS
 /* Non-fatal error in libpng.  Can continue, but may have a problem. */
 extern PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr,
    png_const_charp warning_message));
 
+#ifdef PNG_READ_SUPPORTED
 /* Non-fatal error in libpng, chunk name is prepended to message. */
 extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr,
    png_const_charp warning_message));
+#endif /* PNG_READ_SUPPORTED */
+#endif /* PNG_NO_WARNINGS */
 
 /* The png_set_<chunk> functions are for storing values in the png_info_struct.
  * Similarly, the png_get_<chunk> calls are used to read values from the
@@ -2327,11 +2477,12 @@ extern PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr,
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 extern PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr,
    png_infop info_ptr, int unit, double width, double height));
-#endif
+#else
 #ifdef PNG_FIXED_POINT_SUPPORTED
 extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
    png_infop info_ptr, int unit, png_charp swidth, png_charp sheight));
 #endif
+#endif
 #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
 
 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
@@ -2339,7 +2490,7 @@ extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
    handling or default unknown chunk handling is not desired.  Any chunks not
    listed will be handled in the default manner.  The IHDR and IEND chunks
    must not be listed.
-      keep = 0: follow default behavour
+      keep = 0: follow default behaviour
            = 1: do not keep
            = 2: keep only if safe-to-copy
            = 3: keep even if unsafe-to-copy
@@ -2386,33 +2537,80 @@ extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr,
 #if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
 #include <crtdbg.h>
 #if (PNG_DEBUG > 1)
-#define png_debug(l,m)  _RPT0(_CRT_WARN,m)
-#define png_debug1(l,m,p1)  _RPT1(_CRT_WARN,m,p1)
-#define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m,p1,p2)
+#ifndef _DEBUG
+#  define _DEBUG
+#endif
+#ifndef png_debug
+#define png_debug(l,m)  _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
+#endif
+#ifndef png_debug1
+#define png_debug1(l,m,p1)  _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
+#endif
+#ifndef png_debug2
+#define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
+#endif
 #endif
 #else /* PNG_DEBUG_FILE || !_MSC_VER */
 #ifndef PNG_DEBUG_FILE
 #define PNG_DEBUG_FILE stderr
 #endif /* PNG_DEBUG_FILE */
 #if (PNG_DEBUG > 1)
+#ifndef png_debug
+/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
+ * non-ISO compilers */
+#ifdef __STDC__
 #define png_debug(l,m) \
 { \
      int num_tabs=l; \
-     fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \
+     fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
        (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
 }
+#endif
+#ifndef png_debug1
 #define png_debug1(l,m,p1) \
 { \
      int num_tabs=l; \
-     fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \
+     fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
        (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
 }
+#endif
+#ifndef png_debug2
 #define png_debug2(l,m,p1,p2) \
 { \
      int num_tabs=l; \
-     fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \
+     fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
        (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
 }
+#endif
+#else /* __STDC __ */
+#ifndef png_debug
+#define png_debug(l,m) \
+     int num_tabs=l; \
+     char format[256]; \
+     snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+       m,PNG_STRING_NEWLINE); \
+     fprintf(PNG_DEBUG_FILE,format);
+#endif
+#ifndef png_debug1
+#define png_debug1(l,m,p1) \
+     int num_tabs=l; \
+     char format[256]; \
+     snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+       m,PNG_STRING_NEWLINE); \
+     fprintf(PNG_DEBUG_FILE,format,p1);
+#endif
+#ifndef png_debug2
+#define png_debug2(l,m,p1,p2) \
+     int num_tabs=l; \
+     char format[256]; \
+     snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+       m,PNG_STRING_NEWLINE); \
+     fprintf(PNG_DEBUG_FILE,format,p1,p2);
+#endif
+#endif /* __STDC __ */
 #endif /* (PNG_DEBUG > 1) */
 #endif /* _MSC_VER */
 #endif /* (PNG_DEBUG > 0) */
@@ -2427,8 +2625,6 @@ extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr,
 #define png_debug2(l, m, p1, p2)
 #endif
 
-extern PNG_EXPORT(png_bytep,png_sig_bytes) PNGARG((void));
-
 extern PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr));
 extern PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr));
 extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr));
@@ -2447,6 +2643,7 @@ extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp
 
 /* Added to version 1.2.0 */
 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #define PNG_ASM_FLAG_MMX_SUPPORT_COMPILED  0x01  /* not user-settable */
 #define PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU    0x02  /* not user-settable */
 #define PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  0x04
@@ -2472,6 +2669,7 @@ extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp
 
 #define PNG_SELECT_READ   1
 #define PNG_SELECT_WRITE  2
+#endif /* PNG_MMX_CODE_SUPPORTED */
 
 #if !defined(PNG_1_0_X)
 /* pngget.c */
@@ -2504,11 +2702,11 @@ extern PNG_EXPORT(void,png_set_mmx_thresholds)
    png_uint_32 mmx_rowbytes_threshold));
 
 #endif /* PNG_1_0_X */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
 
 #if !defined(PNG_1_0_X)
 /* png.c, pnggccrd.c, or pngvcrd.c */
 extern PNG_EXPORT(int,png_mmx_support) PNGARG((void));
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
 
 /* Strip the prepended error numbers ("#nnn ") from error and warning
  * messages before passing them to the error or warning handler. */
@@ -2529,6 +2727,7 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
    png_ptr));
 #endif
 
+
 /* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */
 
 #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
@@ -2572,22 +2771,65 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
 
 #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */
 
+/* Inline macros to do direct reads of bytes from the input buffer.  These
+ * require that you are using an architecture that uses PNG byte ordering
+ * (MSB first) and supports unaligned data storage.  I think that PowerPC
+ * in big-endian mode and 680x0 are the only ones that will support this.
+ * The x86 line of processors definitely do not.  The png_get_int_32()
+ * routine also assumes we are using two's complement format for negative
+ * values, which is almost certainly true.
+ */
+#if defined(PNG_READ_BIG_ENDIAN_SUPPORTED)
+#  define png_get_uint_32(buf) ( *((png_uint_32p) (buf)))
+#  define png_get_uint_16(buf) ( *((png_uint_16p) (buf)))
+#  define png_get_int_32(buf)  ( *((png_int_32p)  (buf)))
+#else
+extern PNG_EXPORT(png_uint_32,png_get_uint_32) PNGARG((png_bytep buf));
+extern PNG_EXPORT(png_uint_16,png_get_uint_16) PNGARG((png_bytep buf));
+extern PNG_EXPORT(png_int_32,png_get_int_32) PNGARG((png_bytep buf));
+#endif /* !PNG_READ_BIG_ENDIAN_SUPPORTED */
+extern PNG_EXPORT(png_uint_32,png_get_uint_31)
+  PNGARG((png_structp png_ptr, png_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).
+ */
+extern PNG_EXPORT(void,png_save_uint_32)
+   PNGARG((png_bytep buf, png_uint_32 i));
+extern PNG_EXPORT(void,png_save_int_32)
+   PNGARG((png_bytep buf, png_int_32 i));
+
+/* Place a 16-bit number into a buffer in PNG byte order.
+ * The parameter is declared unsigned int, not png_uint_16,
+ * just to avoid potential problems on pre-ANSI C compilers.
+ */
+extern PNG_EXPORT(void,png_save_uint_16)
+   PNGARG((png_bytep buf, unsigned int i));
+/* No png_save_int_16 -- may be added if there's a real need for it. */
+
+/* ************************************************************************* */
+
 /* These next 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.
  */
 
-#if defined(PNG_INTERNAL)
 
-/* Various modes of operation.  Note that after an init, mode is set to
- * zero automatically when the structure is created.
+/* Various modes of operation, that are visible to applications because
+ * they are used for unknown chunk location.
  */
 #define PNG_HAVE_IHDR               0x01
 #define PNG_HAVE_PLTE               0x02
 #define PNG_HAVE_IDAT               0x04
-#define PNG_AFTER_IDAT              0x08
+#define PNG_AFTER_IDAT              0x08 /* Have complete zlib datastream */
 #define PNG_HAVE_IEND               0x10
+
+#if defined(PNG_INTERNAL)
+
+/* More modes of operation.  Note that after an init, mode is set to
+ * zero automatically when the structure is created.
+ */
 #define PNG_HAVE_gAMA               0x20
 #define PNG_HAVE_cHRM               0x40
 #define PNG_HAVE_sRGB               0x80
@@ -2596,6 +2838,7 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
 #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 */
 
 /* flags for the transformations the PNG library does on the image data */
 #define PNG_BGR                0x0001
@@ -2624,7 +2867,7 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
 #define PNG_RGB_TO_GRAY      0x600000L  /* two bits, RGB_TO_GRAY_ERR|WARN */
                        /*    0x800000L     Unused */
 #define PNG_ADD_ALPHA       0x1000000L  /* Added to libpng-1.2.7 */
-                       /*   0x2000000L  unused */
+#define PNG_EXPAND_tRNS     0x2000000L  /* Added to libpng-1.2.9 */
                        /*   0x4000000L  unused */
                        /*   0x8000000L  unused */
                        /*  0x10000000L  unused */
@@ -2706,9 +2949,8 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
 #if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
 /* place to hold the signature string for a PNG file. */
 #ifdef PNG_USE_GLOBAL_ARRAYS
-   PNG_EXPORT_VAR (const png_byte FARDATA) png_sig[8];
+   PNG_EXPORT_VAR (PNG_CONST png_byte FARDATA) png_sig[8];
 #else
-#define png_sig png_sig_bytes(NULL)
 #endif
 #endif /* PNG_NO_EXTERN */
 
@@ -2716,77 +2958,53 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
  * define the name here, and add an invocation of the macro in png.c and
  * wherever it's needed.
  */
-#define PNG_IHDR const png_byte png_IHDR[5] = { 73,  72,  68,  82, '\0'}
-#define PNG_IDAT const png_byte png_IDAT[5] = { 73,  68,  65,  84, '\0'}
-#define PNG_IEND const png_byte png_IEND[5] = { 73,  69,  78,  68, '\0'}
-#define PNG_PLTE const png_byte png_PLTE[5] = { 80,  76,  84,  69, '\0'}
-#define PNG_bKGD const png_byte png_bKGD[5] = { 98,  75,  71,  68, '\0'}
-#define PNG_cHRM const png_byte png_cHRM[5] = { 99,  72,  82,  77, '\0'}
-#define PNG_gAMA const png_byte png_gAMA[5] = {103,  65,  77,  65, '\0'}
-#define PNG_hIST const png_byte png_hIST[5] = {104,  73,  83,  84, '\0'}
-#define PNG_iCCP const png_byte png_iCCP[5] = {105,  67,  67,  80, '\0'}
-#define PNG_iTXt const png_byte png_iTXt[5] = {105,  84,  88, 116, '\0'}
-#define PNG_oFFs const png_byte png_oFFs[5] = {111,  70,  70, 115, '\0'}
-#define PNG_pCAL const png_byte png_pCAL[5] = {112,  67,  65,  76, '\0'}
-#define PNG_sCAL const png_byte png_sCAL[5] = {115,  67,  65,  76, '\0'}
-#define PNG_pHYs const png_byte png_pHYs[5] = {112,  72,  89, 115, '\0'}
-#define PNG_sBIT const png_byte png_sBIT[5] = {115,  66,  73,  84, '\0'}
-#define PNG_sPLT const png_byte png_sPLT[5] = {115,  80,  76,  84, '\0'}
-#define PNG_sRGB const png_byte png_sRGB[5] = {115,  82,  71,  66, '\0'}
-#define PNG_tEXt const png_byte png_tEXt[5] = {116,  69,  88, 116, '\0'}
-#define PNG_tIME const png_byte png_tIME[5] = {116,  73,  77,  69, '\0'}
-#define PNG_tRNS const png_byte png_tRNS[5] = {116,  82,  78,  83, '\0'}
-#define PNG_zTXt const png_byte png_zTXt[5] = {122,  84,  88, 116, '\0'}
+#define PNG_IHDR png_byte png_IHDR[5] = { 73,  72,  68,  82, '\0'}
+#define PNG_IDAT png_byte png_IDAT[5] = { 73,  68,  65,  84, '\0'}
+#define PNG_IEND png_byte png_IEND[5] = { 73,  69,  78,  68, '\0'}
+#define PNG_PLTE png_byte png_PLTE[5] = { 80,  76,  84,  69, '\0'}
+#define PNG_bKGD png_byte png_bKGD[5] = { 98,  75,  71,  68, '\0'}
+#define PNG_cHRM png_byte png_cHRM[5] = { 99,  72,  82,  77, '\0'}
+#define PNG_gAMA png_byte png_gAMA[5] = {103,  65,  77,  65, '\0'}
+#define PNG_hIST png_byte png_hIST[5] = {104,  73,  83,  84, '\0'}
+#define PNG_iCCP png_byte png_iCCP[5] = {105,  67,  67,  80, '\0'}
+#define PNG_iTXt png_byte png_iTXt[5] = {105,  84,  88, 116, '\0'}
+#define PNG_oFFs png_byte png_oFFs[5] = {111,  70,  70, 115, '\0'}
+#define PNG_pCAL png_byte png_pCAL[5] = {112,  67,  65,  76, '\0'}
+#define PNG_sCAL png_byte png_sCAL[5] = {115,  67,  65,  76, '\0'}
+#define PNG_pHYs png_byte png_pHYs[5] = {112,  72,  89, 115, '\0'}
+#define PNG_sBIT png_byte png_sBIT[5] = {115,  66,  73,  84, '\0'}
+#define PNG_sPLT png_byte png_sPLT[5] = {115,  80,  76,  84, '\0'}
+#define PNG_sRGB png_byte png_sRGB[5] = {115,  82,  71,  66, '\0'}
+#define PNG_tEXt png_byte png_tEXt[5] = {116,  69,  88, 116, '\0'}
+#define PNG_tIME png_byte png_tIME[5] = {116,  73,  77,  69, '\0'}
+#define PNG_tRNS png_byte png_tRNS[5] = {116,  82,  78,  83, '\0'}
+#define PNG_zTXt png_byte png_zTXt[5] = {122,  84,  88, 116, '\0'}
 
 #ifdef PNG_USE_GLOBAL_ARRAYS
-PNG_EXPORT_VAR (const png_byte FARDATA) png_IHDR[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_IDAT[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_IEND[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_PLTE[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_bKGD[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_cHRM[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_gAMA[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_hIST[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_iCCP[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_iTXt[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_oFFs[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_pCAL[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_sCAL[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_pHYs[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_sBIT[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_sPLT[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_sRGB[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_tEXt[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_tIME[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_tRNS[5];
-PNG_EXPORT_VAR (const png_byte FARDATA) png_zTXt[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_IDAT[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_IEND[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_PLTE[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_bKGD[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_cHRM[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_gAMA[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_hIST[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_iCCP[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_iTXt[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_oFFs[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_pCAL[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_sCAL[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_pHYs[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_sBIT[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_sPLT[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_sRGB[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_tEXt[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5];
+PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5];
 #endif /* PNG_USE_GLOBAL_ARRAYS */
 
-
-/* Inline macros to do direct reads of bytes from the input buffer.  These
- * require that you are using an architecture that uses PNG byte ordering
- * (MSB first) and supports unaligned data storage.  I think that PowerPC
- * in big-endian mode and 680x0 are the only ones that will support this.
- * The x86 line of processors definitely do not.  The png_get_int_32()
- * routine also assumes we are using two's complement format for negative
- * values, which is almost certainly true.
- */
-#if defined(PNG_READ_BIG_ENDIAN_SUPPORTED)
-#  if defined(PNG_pCAL_SUPPORTED) || defined(PNG_oFFs_SUPPORTED)
-#    define png_get_int_32(buf) ( *((png_int_32p) (buf)))
-#  endif
-#  define png_get_uint_32(buf) ( *((png_uint_32p) (buf)))
-#  define png_get_uint_16(buf) ( *((png_uint_16p) (buf)))
-#else
-#  if defined(PNG_pCAL_SUPPORTED) || defined(PNG_oFFs_SUPPORTED)
-PNG_EXTERN png_int_32 png_get_int_32 PNGARG((png_bytep buf));
-#  endif
-PNG_EXTERN png_uint_32 png_get_uint_32 PNGARG((png_bytep buf));
-PNG_EXTERN png_uint_16 png_get_uint_16 PNGARG((png_bytep buf));
-#endif /* !PNG_READ_BIG_ENDIAN_SUPPORTED */
-PNG_EXTERN png_uint_32 png_get_uint_31 PNGARG((png_structp png_ptr,
-  png_bytep buf));
-
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 /* Initialize png_ptr struct for reading, and allocate any other memory.
  * (old interface - DEPRECATED - use png_create_read_struct instead).
  */
@@ -2794,12 +3012,17 @@ extern PNG_EXPORT(void,png_read_init) PNGARG((png_structp png_ptr));
 #undef png_read_init
 #define png_read_init(png_ptr) png_read_init_3(&png_ptr, \
     PNG_LIBPNG_VER_STRING,  png_sizeof(png_struct));
+#endif
+
 extern PNG_EXPORT(void,png_read_init_3) PNGARG((png_structpp ptr_ptr,
     png_const_charp user_png_ver, png_size_t png_struct_size));
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 extern PNG_EXPORT(void,png_read_init_2) PNGARG((png_structp png_ptr,
     png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t
     png_info_size));
+#endif
 
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 /* Initialize png_ptr struct for writing, and allocate any other memory.
  * (old interface - DEPRECATED - use png_create_write_struct instead).
  */
@@ -2807,6 +3030,8 @@ extern PNG_EXPORT(void,png_write_init) PNGARG((png_structp png_ptr));
 #undef png_write_init
 #define png_write_init(png_ptr) png_write_init_3(&png_ptr, \
     PNG_LIBPNG_VER_STRING, png_sizeof(png_struct));
+#endif
+
 extern PNG_EXPORT(void,png_write_init_3) PNGARG((png_structpp ptr_ptr,
     png_const_charp user_png_ver, png_size_t png_struct_size));
 extern PNG_EXPORT(void,png_write_init_2) PNGARG((png_structp png_ptr,
@@ -2884,8 +3109,8 @@ PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf,
 /* Decompress data in a chunk that uses compression */
 #if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \
     defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
-PNG_EXTERN png_charp png_decompress_chunk PNGARG((png_structp png_ptr,
-   int comp_type, png_charp chunkdata, png_size_t chunklength,
+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
 
@@ -2906,23 +3131,6 @@ PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr,
 PNG_EXTERN void png_flush PNGARG((png_structp png_ptr));
 #endif
 
-
-/* Place a 32-bit number into a buffer in PNG byte order (big-endian).
- * The only currently known PNG chunks that use signed numbers are
- * the ancillary extension chunks, oFFs and pCAL.
- */
-PNG_EXTERN void png_save_uint_32 PNGARG((png_bytep buf, png_uint_32 i));
-
-#if defined(PNG_WRITE_pCAL_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
-PNG_EXTERN void png_save_int_32 PNGARG((png_bytep buf, png_int_32 i));
-#endif
-
-/* Place a 16-bit number into a buffer in PNG byte order.
- * The parameter is declared unsigned int, not png_uint_16,
- * just to avoid potential problems on pre-ANSI C compilers.
- */
-PNG_EXTERN void png_save_uint_16 PNGARG((png_bytep buf, unsigned int i));
-
 /* simple function to write the signature */
 PNG_EXTERN void png_write_sig PNGARG((png_structp png_ptr));
 
@@ -3403,9 +3611,46 @@ PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info,
 #endif
 
 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 /* png.c */ /* PRIVATE */
 PNG_EXTERN void png_init_mmx_flags PNGARG((png_structp png_ptr));
 #endif
+#endif
+
+#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
+PNG_EXTERN png_uint_32 png_get_pixels_per_inch PNGARG((png_structp png_ptr,
+png_infop info_ptr));
+
+PNG_EXTERN png_uint_32 png_get_x_pixels_per_inch PNGARG((png_structp png_ptr,
+png_infop info_ptr));
+
+PNG_EXTERN png_uint_32 png_get_y_pixels_per_inch PNGARG((png_structp png_ptr,
+png_infop info_ptr));
+
+PNG_EXTERN float png_get_x_offset_inches PNGARG((png_structp png_ptr,
+png_infop info_ptr));
+
+PNG_EXTERN float png_get_y_offset_inches PNGARG((png_structp png_ptr,
+png_infop info_ptr));
+
+#if defined(PNG_pHYs_SUPPORTED)
+PNG_EXTERN png_uint_32 png_get_pHYs_dpi PNGARG((png_structp png_ptr,
+png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
+#endif /* PNG_pHYs_SUPPORTED */
+#endif  /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
+
+/* Read the chunk header (length + type name) */
+PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr));
+
+/* Added at libpng version 1.2.34 */
+#if defined(PNG_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
+
 /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
 
 #endif /* PNG_INTERNAL */

pngconf.h

@@ -1,9 +1,9 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.2.8 - December 3, 2004
+ * libpng version 1.0.43rc01 - February 12, 2009
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2009 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.)
  */
@@ -17,14 +17,18 @@
 #ifndef PNGCONF_H
 #define PNGCONF_H
 
-#define PNG_1_2_X
+#define PNG_1_0_X
 
 /* 
  * PNG_USER_CONFIG has to be defined on the compiler command line. This
  * includes the resource compiler for Windows DLL configurations.
  */
-#ifdef PNG_USER_CONFIG
-#include "pngusr.h"
+
+/* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
+#ifdef PNG_CONFIGURE_LIBPNG
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 #endif
 
 /*
@@ -55,8 +59,8 @@
 #endif
 
 #ifdef PRIVATEBUILD
-# pragma message("PRIVATEBUILD is deprecated. Use\
- PNG_USER_PRIVATEBUILD instead.")
+# pragma message("PRIVATEBUILD is deprecated.\
+ Use PNG_USER_PRIVATEBUILD instead.")
 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
 #endif
 #endif /* __STDC__ */
@@ -65,6 +69,14 @@
 
 /* End of material added to libpng-1.2.8 */
 
+/* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble
+   Restored at libpng-1.2.21 */
+#if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \
+    !defined(PNG_WARN_UNINITIALIZED_ROW)
+#  define PNG_WARN_UNINITIALIZED_ROW 1
+#endif
+/* End of material added at libpng-1.2.19/1.2.21 */
+
 /* This is the size of the compression buffer, and thus the size of
  * an IDAT chunk.  Make this whatever size you feel is best for your
  * machine.  One of these will be allocated per png_struct.  When this
@@ -266,6 +278,7 @@
 #  define PNGARG(arglist) arglist
 #endif /* _NO_PROTO */
 
+
 #endif /* OF */
 
 #endif /* PNGARG */
@@ -304,7 +317,7 @@
      /* If you encounter a compiler error here, see the explanation
       * near the end of INSTALL.
       */
-         __png.h__ already includes setjmp.h;
+         __pngconf.h__ already includes setjmp.h;
          __dont__ include it again.;
 #    endif
 #  endif /* __linux__ */
@@ -314,7 +327,9 @@
 
 #  ifdef __linux__
 #    ifdef PNG_SAVE_BSD_SOURCE
-#      define _BSD_SOURCE
+#      ifndef _BSD_SOURCE
+#        define _BSD_SOURCE
+#      endif
 #      undef PNG_SAVE_BSD_SOURCE
 #    endif
 #  endif /* __linux__ */
@@ -453,21 +468,33 @@
  */
 
 /* The size of the png_text structure changed in libpng-1.0.6 when
- * iTXt is supported.  It is turned off by default, to support old apps
- * that malloc the png_text structure instead of calling png_set_text()
- * and letting libpng malloc it.  It will be turned on by default in
- * libpng-1.3.0.
+ * iTXt support was added.  iTXt support was turned off by default through
+ * libpng-1.2.x, to support old apps that malloc the png_text structure
+ * instead of calling png_set_text() and letting libpng malloc it.  It
+ * was turned on by default in libpng-1.3.0.
  */
 
-#ifndef PNG_iTXt_SUPPORTED
-#  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
+#  ifndef PNG_NO_iTXt_SUPPORTED
+#    define PNG_NO_iTXt_SUPPORTED
+#  endif
+#  ifndef PNG_NO_READ_iTXt
 #    define PNG_NO_READ_iTXt
 #  endif
-#  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
+#  ifndef PNG_NO_WRITE_iTXt
 #    define PNG_NO_WRITE_iTXt
 #  endif
 #endif
 
+#if !defined(PNG_NO_iTXt_SUPPORTED)
+#  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
+#    define PNG_READ_iTXt
+#  endif
+#  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
+#    define PNG_WRITE_iTXt
+#  endif
+#endif
+
 /* The following support, added after version 1.0.0, can be turned off here en
  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
  * with old applications that require the length of png_struct and png_info
@@ -572,24 +599,26 @@
 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 
 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
- !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
-#  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
-#endif                               /* about interlacing capability!  You'll */
-              /* still have interlacing unless you change the following line: */
+ !defined(PNG_PROGRESSIVE_READ_SUPPORTED) /* if you don't do progressive   */
+#  define PNG_PROGRESSIVE_READ_SUPPORTED  /* reading.  This is not talking */
+#endif                            /* about interlacing capability!  You'll */
+           /* still have interlacing unless you change the following line: */
 
-#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
+#define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
 
 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
-#    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */
+#    define PNG_READ_COMPOSITE_NODIV_SUPPORTED  /* well tested on Intel, SGI */
 #  endif
 #endif
 
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 /* Deprecated, will be removed from version 2.0.0.
    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 #ifndef PNG_NO_READ_EMPTY_PLTE
 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 #endif
+#endif
 
 #endif /* PNG_READ_SUPPORTED */
 
@@ -633,11 +662,15 @@
 #  endif
 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 
+#if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
+    !defined(PNG_WRITE_INTERLACING_SUPPORTED)
 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
                                             encoders, but can cause trouble
                                             if left undefined */
+#endif
 
 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
+    !defined(PNG_WRITE_WEIGHTED_FILTER) && \
      defined(PNG_FLOATING_POINT_SUPPORTED)
 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 #endif
@@ -646,10 +679,12 @@
 #  define PNG_WRITE_FLUSH_SUPPORTED
 #endif
 
+#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 #endif
+#endif
 
 #endif /* PNG_WRITE_SUPPORTED */
 
@@ -691,21 +726,46 @@
 #endif
 
 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0 
-   even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
+ * and removed from version 1.2.20.  The following will be removed
+ * from libpng-1.4.0
+*/
+
+#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
+#  ifndef PNG_OPTIMIZED_CODE_SUPPORTED
+#    define PNG_OPTIMIZED_CODE_SUPPORTED
+#  endif
+#endif
+
 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 #  endif
+
+#  if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
+     /* work around 64-bit gcc compiler bugs in gcc-3.x */
+#    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
+#      define PNG_NO_MMX_CODE
+#    endif
+#  endif
+
+#  if defined(__APPLE__)
+#    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
+#      define PNG_NO_MMX_CODE
+#    endif
+#  endif
+
+#  if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
+#    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
+#      define PNG_NO_MMX_CODE
+#    endif
+#  endif
+
 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 #    define PNG_MMX_CODE_SUPPORTED
 #  endif
-#endif
 
-/* If you are sure that you don't need thread safety and you are compiling
-   with PNG_USE_PNGCCRD for an MMX application, you can define this for
-   faster execution.  See pnggccrd.c.
-#define PNG_THREAD_UNSAFE_OK
-*/
+#endif
+/* end of obsolete code to be removed from libpng-1.4.0 */
 
 #if !defined(PNG_1_0_X)
 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
@@ -732,6 +792,8 @@
 #  define PNG_USER_HEIGHT_MAX 1000000L
 #endif
 
+
+
 /* These are currently experimental features, define them if you want */
 
 /* very little testing */
@@ -1057,10 +1119,10 @@ typedef unsigned char png_byte;
    change (I'm not sure if you will or not, so I thought I'd be safe) */
 #ifdef PNG_SIZE_T
    typedef PNG_SIZE_T png_size_t;
-#  define png_sizeof(x) png_convert_size(sizeof (x))
+#  define png_sizeof(x) png_convert_size(sizeof(x))
 #else
    typedef size_t png_size_t;
-#  define png_sizeof(x) sizeof (x)
+#  define png_sizeof(x) sizeof(x)
 #endif
 
 /* The following is needed for medium model support.  It cannot be in the
@@ -1227,7 +1289,8 @@ typedef z_stream FAR *  png_zstreamp;
  * but might be required for some pre-1.0.5c applications.
  */
 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
-#  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
+#  if defined(PNG_NO_GLOBAL_ARRAYS) || \
+      (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
 #    define PNG_USE_LOCAL_ARRAYS
 #  else
 #    define PNG_USE_GLOBAL_ARRAYS
@@ -1364,8 +1427,7 @@ typedef z_stream FAR *  png_zstreamp;
 #  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_strcpy  _fstrcpy
-#  define png_strncpy _fstrncpy   /* Added to v 1.2.6 */
+#  define png_snprintf _fsnprintf   /* Added to v 1.2.19 */
 #  define png_strlen  _fstrlen
 #  define png_memcmp  _fmemcmp    /* SJT: added */
 #  define png_memcpy  _fmemcpy
@@ -1373,8 +1435,27 @@ typedef z_stream FAR *  png_zstreamp;
 #else /* use the usual functions */
 #  define CVT_PTR(ptr)         (ptr)
 #  define CVT_PTR_NOCHECK(ptr) (ptr)
-#  define png_strcpy  strcpy
-#  define png_strncpy strncpy     /* Added to v 1.2.6 */
+#  ifndef PNG_NO_SNPRINTF
+#    ifdef _MSC_VER
+#      define png_snprintf _snprintf   /* Added to v 1.2.19 */
+#      define png_snprintf2 _snprintf
+#      define png_snprintf6 _snprintf
+#    else
+#      define png_snprintf snprintf   /* Added to v 1.2.19 */
+#      define png_snprintf2 snprintf
+#      define png_snprintf6 snprintf
+#    endif
+#  else
+     /* You don't have or don't want to use snprintf().  Caution: Using
+      * sprintf instead of snprintf exposes your application to accidental
+      * or malevolent buffer overflows.  If you don't have snprintf()
+      * as a general rule you should provide one (you can get one from
+      * Portable OpenSSH). */
+#    define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
+#    define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
+#    define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
+        sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
+#  endif
 #  define png_strlen  strlen
 #  define png_memcmp  memcmp      /* SJT: added */
 #  define png_memcpy  memcpy
@@ -1390,47 +1471,6 @@ typedef z_stream FAR *  png_zstreamp;
 #  define PNG_ZBUF_SIZE 65536L
 #endif
 
-#ifdef PNG_READ_SUPPORTED
-/* Prior to libpng-1.0.9, this block was in pngasmrd.h */
-#if defined(PNG_INTERNAL)
-
-/* These are the default thresholds before the MMX code kicks in; if either
- * rowbytes or bitdepth is below the threshold, plain C code is used.  These
- * can be overridden at runtime via the png_set_mmx_thresholds() call in
- * libpng 1.2.0 and later.  The values below were chosen by Intel.
- */
-
-#ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
-#  define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT  128  /*  >=  */
-#endif
-#ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
-#  define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT  9    /*  >=  */   
-#endif
-
-/* Set this in the makefile for VC++ on Pentium, not here. */
-/* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
- * MMX will be detected at run time and used if present.
- */
-#ifdef PNG_USE_PNGVCRD
-#  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
-#  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
-#  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-#endif
-
-/* Set this in the makefile for gcc/as on Pentium, not here. */
-/* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
- * MMX will be detected at run time and used if present.
- */
-#ifdef PNG_USE_PNGGCCRD
-#  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
-#  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
-#  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-#endif
-/* - see pnggccrd.c for info about what is currently enabled */
-
-#endif /* PNG_INTERNAL */
-#endif /* PNG_READ_SUPPORTED */
-
 /* Added at libpng-1.2.8 */
 #endif /* PNG_VERSION_INFO_ONLY */
 

pngerror.c

@@ -1,9 +1,9 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * libpng version 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.34 [December 18, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  *
@@ -15,51 +15,60 @@
 
 #define PNG_INTERNAL
 #include "png.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
 static void /* PRIVATE */
 png_default_error PNGARG((png_structp png_ptr,
   png_const_charp error_message));
+#ifndef PNG_NO_WARNINGS
 static void /* PRIVATE */
 png_default_warning PNGARG((png_structp png_ptr,
   png_const_charp warning_message));
+#endif /* PNG_NO_WARNINGS */
 
 /* This function is called whenever there is a fatal error.  This function
  * should not be changed.  If there is a need to handle errors differently,
  * you should supply a replacement error function and use png_set_error_fn()
  * to replace the error function at run-time.
  */
+#ifndef PNG_NO_ERROR_TEXT
 void PNGAPI
 png_error(png_structp png_ptr, png_const_charp error_message)
 {
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
    char msg[16];
-   if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+   if (png_ptr != NULL)
    {
-     if (*error_message == '#')
+     if (png_ptr->flags&
+       (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
      {
-         int offset;
-         for (offset=1; offset<15; offset++)
-            if (*(error_message+offset) == ' ')
-                break;
-         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
-         {
-            int i;
-            for (i=0; i<offset-1; i++)
-               msg[i]=error_message[i+1];
-            msg[i]='\0';
-            error_message=msg;
-         }
-         else
-            error_message+=offset;
-     }
-     else
-     {
-         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
-         {
-            msg[0]='0';        
-            msg[1]='\0';
-            error_message=msg;
-         }
+       if (*error_message == '#')
+       {
+         /* Strip "#nnnn " from beginning of error message. */
+           int offset;
+           for (offset = 1; offset<15; offset++)
+              if (error_message[offset] == ' ')
+                  break;
+           if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+           {
+              int i;
+              for (i = 0; i < offset - 1; i++)
+                 msg[i] = error_message[i + 1];
+              msg[i - 1] = '\0';
+              error_message = msg;
+           }
+           else
+              error_message += offset;
+       }
+       else
+       {
+           if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+           {
+              msg[0] = '0';
+              msg[1] = '\0';
+              error_message = msg;
+           }
+       }
      }
    }
 #endif
@@ -70,7 +79,20 @@ png_error(png_structp png_ptr, png_const_charp error_message)
       use the default handler, which will not return. */
    png_default_error(png_ptr, error_message);
 }
+#else
+void PNGAPI
+png_err(png_structp png_ptr)
+{
+   if (png_ptr != NULL && png_ptr->error_fn != NULL)
+      (*(png_ptr->error_fn))(png_ptr, '\0');
 
+   /* If the custom handler doesn't exist, or if it returns,
+      use the default handler, which will not return. */
+   png_default_error(png_ptr, '\0');
+}
+#endif /* PNG_NO_ERROR_TEXT */
+
+#ifndef PNG_NO_WARNINGS
 /* This function is called whenever there is a non-fatal error.  This function
  * should not be changed.  If there is a need to handle warnings differently,
  * you should supply a replacement warning function and use
@@ -80,22 +102,28 @@ void PNGAPI
 png_warning(png_structp png_ptr, png_const_charp warning_message)
 {
    int offset = 0;
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
-   if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
-#endif
+   if (png_ptr != NULL)
    {
-     if (*warning_message == '#')
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (png_ptr->flags&
+     (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+#endif
      {
-         for (offset=1; offset<15; offset++)
-            if (*(warning_message+offset) == ' ')
-                break;
+       if (*warning_message == '#')
+       {
+           for (offset = 1; offset < 15; offset++)
+              if (warning_message[offset] == ' ')
+                  break;
+       }
      }
    }
    if (png_ptr != NULL && png_ptr->warning_fn != NULL)
-      (*(png_ptr->warning_fn))(png_ptr, warning_message+offset);
+      (*(png_ptr->warning_fn))(png_ptr, warning_message + offset);
    else
-      png_default_warning(png_ptr, warning_message+offset);
+      png_default_warning(png_ptr, warning_message + offset);
 }
+#endif /* PNG_NO_WARNINGS */
+
 
 /* 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,
@@ -109,6 +137,9 @@ static PNG_CONST char png_digit[16] = {
    'A', 'B', 'C', 'D', 'E', 'F'
 };
 
+#define PNG_MAX_ERROR_TEXT 64
+
+#if !defined(PNG_NO_WARNINGS) || !defined(PNG_NO_ERROR_TEXT)
 static void /* PRIVATE */
 png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
    error_message)
@@ -132,31 +163,47 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
    }
 
    if (error_message == NULL)
-      buffer[iout] = 0;
+      buffer[iout] = '\0';
    else
    {
       buffer[iout++] = ':';
       buffer[iout++] = ' ';
-      png_strncpy(buffer+iout, error_message, 63);
-      buffer[iout+63] = 0;
+      png_memcpy(buffer + iout, error_message, PNG_MAX_ERROR_TEXT);
+      buffer[iout + PNG_MAX_ERROR_TEXT - 1] = '\0';
    }
 }
 
+#ifdef PNG_READ_SUPPORTED
 void PNGAPI
 png_chunk_error(png_structp png_ptr, png_const_charp error_message)
 {
-   char msg[18+64];
-   png_format_buffer(png_ptr, msg, error_message);
-   png_error(png_ptr, msg);
+   char msg[18+PNG_MAX_ERROR_TEXT];
+   if (png_ptr == NULL)
+     png_error(png_ptr, error_message);
+   else
+   {
+     png_format_buffer(png_ptr, msg, error_message);
+     png_error(png_ptr, msg);
+   }
 }
+#endif /* PNG_READ_SUPPORTED */
+#endif /* !defined(PNG_NO_WARNINGS) || !defined(PNG_NO_ERROR_TEXT) */
 
+#ifndef PNG_NO_WARNINGS
 void PNGAPI
 png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
 {
-   char msg[18+64];
-   png_format_buffer(png_ptr, msg, warning_message);
-   png_warning(png_ptr, msg);
+   char msg[18+PNG_MAX_ERROR_TEXT];
+   if (png_ptr == NULL)
+     png_warning(png_ptr, warning_message);
+   else
+   {
+     png_format_buffer(png_ptr, msg, warning_message);
+     png_warning(png_ptr, msg);
+   }
 }
+#endif /* PNG_NO_WARNINGS */
+
 
 /* This is the default error handling function.  Note that replacements for
  * this function MUST NOT RETURN, or the program will likely crash.  This
@@ -170,22 +217,23 @@ png_default_error(png_structp png_ptr, png_const_charp error_message)
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
    if (*error_message == '#')
    {
+     /* Strip "#nnnn " from beginning of warning message. */
      int offset;
      char error_number[16];
-     for (offset=0; offset<15; offset++)
+     for (offset = 0; offset<15; offset++)
      {
-         error_number[offset] = *(error_message+offset+1);
-         if (*(error_message+offset) == ' ')
+         error_number[offset] = error_message[offset + 1];
+         if (error_message[offset] == ' ')
              break;
      }
-     if((offset > 1) && (offset < 15))
+     if ((offset > 1) && (offset < 15))
      {
-       error_number[offset-1]='\0';
+       error_number[offset - 1] = '\0';
        fprintf(stderr, "libpng error no. %s: %s\n", error_number,
-          error_message+offset);
+          error_message + offset + 1);
      }
      else
-       fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
+       fprintf(stderr, "libpng error: %s, offset=%d\n", error_message, offset);
    }
    else
 #endif
@@ -193,27 +241,27 @@ png_default_error(png_structp png_ptr, png_const_charp error_message)
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
+   if (png_ptr)
+   {
 #  ifdef USE_FAR_KEYWORD
    {
       jmp_buf jmpbuf;
-      png_memcpy(jmpbuf,png_ptr->jmpbuf,png_sizeof(jmp_buf));
+      png_memcpy(jmpbuf, png_ptr->jmpbuf, png_sizeof(jmp_buf));
       longjmp(jmpbuf, 1);
    }
 #  else
    longjmp(png_ptr->jmpbuf, 1);
-# endif
+#  endif
+   }
 #else
-   /* make compiler happy */ ;
-   if (png_ptr)
    PNG_ABORT();
 #endif
 #ifdef PNG_NO_CONSOLE_IO
-   /* make compiler happy */ ;
-   if (&error_message != NULL)
-      return;
+   error_message = error_message; /* make compiler happy */
 #endif
 }
 
+#ifndef PNG_NO_WARNINGS
 /* 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 them to.  In the default configuration, png_ptr is
@@ -228,17 +276,17 @@ png_default_warning(png_structp png_ptr, png_const_charp warning_message)
    {
      int offset;
      char warning_number[16];
-     for (offset=0; offset<15; offset++)
+     for (offset = 0; offset < 15; offset++)
      {
-        warning_number[offset]=*(warning_message+offset+1);
-        if (*(warning_message+offset) == ' ')
+        warning_number[offset] = warning_message[offset + 1];
+        if (warning_message[offset] == ' ')
             break;
      }
-     if((offset > 1) && (offset < 15))
+     if ((offset > 1) && (offset < 15))
      {
-       warning_number[offset-1]='\0';
+       warning_number[offset + 1] = '\0';
        fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
-          warning_message+offset);
+          warning_message + offset);
      }
      else
        fprintf(stderr, "libpng warning: %s\n", warning_message);
@@ -247,14 +295,11 @@ png_default_warning(png_structp png_ptr, png_const_charp warning_message)
 #  endif
      fprintf(stderr, "libpng warning: %s\n", warning_message);
 #else
-   /* make compiler happy */ ;
-   if (warning_message)
-     return;
+   warning_message = warning_message; /* make compiler happy */
 #endif
-   /* make compiler happy */ ;
-   if (png_ptr)
-      return;
+   png_ptr = png_ptr; /* make compiler happy */
 }
+#endif /* PNG_NO_WARNINGS */
 
 /* This function is called when the application wants to use another method
  * of handling errors and warnings.  Note that the error function MUST NOT
@@ -265,6 +310,8 @@ void PNGAPI
 png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
    png_error_ptr error_fn, png_error_ptr warning_fn)
 {
+   if (png_ptr == NULL)
+      return;
    png_ptr->error_ptr = error_ptr;
    png_ptr->error_fn = error_fn;
    png_ptr->warning_fn = warning_fn;
@@ -278,6 +325,8 @@ png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
 png_voidp PNGAPI
 png_get_error_ptr(png_structp png_ptr)
 {
+   if (png_ptr == NULL)
+      return NULL;
    return ((png_voidp)png_ptr->error_ptr);
 }
 
@@ -286,10 +335,11 @@ png_get_error_ptr(png_structp png_ptr)
 void PNGAPI
 png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
 {
-   if(png_ptr != NULL)
+   if (png_ptr != NULL)
    {
      png_ptr->flags &=
        ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
    }
 }
 #endif
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

pngget.c

@@ -1,15 +1,16 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * libpng 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.30 [August 15, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  */
 
 #define PNG_INTERNAL
 #include "png.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
 png_uint_32 PNGAPI
 png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
@@ -119,8 +120,8 @@ png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_pHYs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
-      png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter");
-      if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
+      png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter");
+      if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
           return (0);
       else return (info_ptr->x_pixels_per_unit);
    }
@@ -137,8 +138,8 @@ png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_pHYs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
-      png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
-      if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
+      png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter");
+      if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
           return (0);
       else return (info_ptr->y_pixels_per_unit);
    }
@@ -155,8 +156,8 @@ png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_pHYs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
-      png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
-      if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
+      png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
+      if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
          info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
           return (0);
       else return (info_ptr->x_pixels_per_unit);
@@ -175,7 +176,7 @@ png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_pHYs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
-      png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
+      png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
       if (info_ptr->x_pixels_per_unit == 0)
          return ((float)0.0);
       else
@@ -196,8 +197,8 @@ png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_oFFs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_oFFs)
    {
-      png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
-      if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
+      png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
+      if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
           return (0);
       else return (info_ptr->x_offset);
    }
@@ -214,8 +215,8 @@ png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_oFFs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_oFFs)
    {
-      png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
-      if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
+      png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
+      if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
           return (0);
       else return (info_ptr->y_offset);
    }
@@ -232,8 +233,8 @@ png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_oFFs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_oFFs)
    {
-      png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
-      if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
+      png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
+      if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
           return (0);
       else return (info_ptr->x_offset);
    }
@@ -250,8 +251,8 @@ png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_oFFs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_oFFs)
    {
-      png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
-      if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
+      png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
+      if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
           return (0);
       else return (info_ptr->y_offset);
    }
@@ -306,7 +307,7 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
 
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
    {
-      png_debug1(1, "in %s retrieval function\n", "pHYs");
+      png_debug1(1, "in %s retrieval function", "pHYs");
       if (res_x != NULL)
       {
          *res_x = info_ptr->x_pixels_per_unit;
@@ -321,7 +322,7 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
       {
          *unit_type = (int)info_ptr->phys_unit_type;
          retval |= PNG_INFO_pHYs;
-         if(*unit_type == 1)
+         if (*unit_type == 1)
          {
             if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
             if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
@@ -363,7 +364,7 @@ png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
       && background != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "bKGD");
+      png_debug1(1, "in %s retrieval function", "bKGD");
       *background = &(info_ptr->background);
       return (PNG_INFO_bKGD);
    }
@@ -380,7 +381,7 @@ png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
 {
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
    {
-      png_debug1(1, "in %s retrieval function\n", "cHRM");
+      png_debug1(1, "in %s retrieval function", "cHRM");
       if (white_x != NULL)
          *white_x = (double)info_ptr->x_white;
       if (white_y != NULL)
@@ -411,7 +412,7 @@ png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
 {
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
    {
-      png_debug1(1, "in %s retrieval function\n", "cHRM");
+      png_debug1(1, "in %s retrieval function", "cHRM");
       if (white_x != NULL)
          *white_x = info_ptr->int_x_white;
       if (white_y != NULL)
@@ -443,7 +444,7 @@ png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
       && file_gamma != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "gAMA");
+      png_debug1(1, "in %s retrieval function", "gAMA");
       *file_gamma = (double)info_ptr->gamma;
       return (PNG_INFO_gAMA);
    }
@@ -458,7 +459,7 @@ png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
       && int_file_gamma != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "gAMA");
+      png_debug1(1, "in %s retrieval function", "gAMA");
       *int_file_gamma = info_ptr->int_gamma;
       return (PNG_INFO_gAMA);
    }
@@ -474,7 +475,7 @@ png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
       && file_srgb_intent != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "sRGB");
+      png_debug1(1, "in %s retrieval function", "sRGB");
       *file_srgb_intent = (int)info_ptr->srgb_intent;
       return (PNG_INFO_sRGB);
    }
@@ -491,7 +492,7 @@ png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
       && name != NULL && profile != NULL && proflen != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "iCCP");
+      png_debug1(1, "in %s retrieval function", "iCCP");
       *name = info_ptr->iccp_name;
       *profile = info_ptr->iccp_profile;
       /* compression_type is a dummy so the API won't have to change
@@ -510,8 +511,11 @@ png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
              png_sPLT_tpp spalettes)
 {
    if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
+   {
      *spalettes = info_ptr->splt_palettes;
-   return ((png_uint_32)info_ptr->splt_palettes_num);
+     return ((png_uint_32)info_ptr->splt_palettes_num);
+   }
+   return (0);
 }
 #endif
 
@@ -522,7 +526,7 @@ png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
       && hist != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "hIST");
+      png_debug1(1, "in %s retrieval function", "hIST");
       *hist = info_ptr->hist;
       return (PNG_INFO_hIST);
    }
@@ -540,7 +544,7 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
       bit_depth != NULL && color_type != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "IHDR");
+      png_debug1(1, "in %s retrieval function", "IHDR");
       *width = info_ptr->width;
       *height = info_ptr->height;
       *bit_depth = info_ptr->bit_depth;
@@ -584,7 +588,7 @@ png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
       && offset_x != NULL && offset_y != NULL && unit_type != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "oFFs");
+      png_debug1(1, "in %s retrieval function", "oFFs");
       *offset_x = info_ptr->x_offset;
       *offset_y = info_ptr->y_offset;
       *unit_type = (int)info_ptr->offset_unit_type;
@@ -604,7 +608,7 @@ png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
       && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
       nparams != NULL && units != NULL && params != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "pCAL");
+      png_debug1(1, "in %s retrieval function", "pCAL");
       *purpose = info_ptr->pcal_purpose;
       *X0 = info_ptr->pcal_X0;
       *X1 = info_ptr->pcal_X1;
@@ -664,7 +668,7 @@ png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL &&
       (info_ptr->valid & PNG_INFO_pHYs))
    {
-      png_debug1(1, "in %s retrieval function\n", "pHYs");
+      png_debug1(1, "in %s retrieval function", "pHYs");
       if (res_x != NULL)
       {
          *res_x = info_ptr->x_pixels_per_unit;
@@ -692,10 +696,10 @@ png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
        && palette != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "PLTE");
+      png_debug1(1, "in %s retrieval function", "PLTE");
       *palette = info_ptr->palette;
       *num_palette = info_ptr->num_palette;
-      png_debug1(3, "num_palette = %d\n", *num_palette);
+      png_debug1(3, "num_palette = %d", *num_palette);
       return (PNG_INFO_PLTE);
    }
    return (0);
@@ -708,7 +712,7 @@ png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
       && sig_bit != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "sBIT");
+      png_debug1(1, "in %s retrieval function", "sBIT");
       *sig_bit = &(info_ptr->sig_bit);
       return (PNG_INFO_sBIT);
    }
@@ -723,7 +727,7 @@ png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
 {
    if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
    {
-      png_debug1(1, "in %s retrieval function\n",
+      png_debug1(1, "in %s retrieval function",
          (png_ptr->chunk_name[0] == '\0' ? "text"
              : (png_const_charp)png_ptr->chunk_name));
       if (text_ptr != NULL)
@@ -745,7 +749,7 @@ png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
        && mod_time != NULL)
    {
-      png_debug1(1, "in %s retrieval function\n", "tIME");
+      png_debug1(1, "in %s retrieval function", "tIME");
       *mod_time = &(info_ptr->mod_time);
       return (PNG_INFO_tIME);
    }
@@ -761,7 +765,7 @@ png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
    png_uint_32 retval = 0;
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
    {
-      png_debug1(1, "in %s retrieval function\n", "tRNS");
+      png_debug1(1, "in %s retrieval function", "tRNS");
       if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
       {
           if (trans != NULL)
@@ -779,10 +783,10 @@ png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
              *trans_values = &(info_ptr->trans_values);
              retval |= PNG_INFO_tRNS;
           }
-          if(trans != NULL)
+          if (trans != NULL)
              *trans = NULL;
       }
-      if(num_trans != NULL)
+      if (num_trans != NULL)
       {
          *num_trans = info_ptr->num_trans;
          retval |= PNG_INFO_tRNS;
@@ -798,8 +802,11 @@ png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
              png_unknown_chunkpp unknowns)
 {
    if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
+   {
      *unknowns = info_ptr->unknown_chunks;
-   return ((png_uint_32)info_ptr->unknown_chunks_num);
+     return ((png_uint_32)info_ptr->unknown_chunks_num);
+   }
+   return (0);
 }
 #endif
 
@@ -827,98 +834,56 @@ png_get_compression_buffer_size(png_structp png_ptr)
 }
 #endif
 
-#ifndef PNG_1_0_X
 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+#ifndef PNG_1_0_X
 /* this function was added to libpng 1.2.0 and should exist by default */
 png_uint_32 PNGAPI
 png_get_asm_flags (png_structp png_ptr)
 {
-    return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L);
+    /* obsolete, to be removed from libpng-1.4.0 */
+    return (png_ptr? 0L: 0L);
 }
 
 /* this function was added to libpng 1.2.0 and should exist by default */
 png_uint_32 PNGAPI
 png_get_asm_flagmask (int flag_select)
 {
-    png_uint_32 settable_asm_flags = 0;
-
-    if (flag_select & PNG_SELECT_READ)
-        settable_asm_flags |=
-          PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  |
-          PNG_ASM_FLAG_MMX_READ_INTERLACE    |
-          PNG_ASM_FLAG_MMX_READ_FILTER_SUB   |
-          PNG_ASM_FLAG_MMX_READ_FILTER_UP    |
-          PNG_ASM_FLAG_MMX_READ_FILTER_AVG   |
-          PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
-          /* no non-MMX flags yet */
-
-#if 0
-    /* GRR:  no write-flags yet, either, but someday... */
-    if (flag_select & PNG_SELECT_WRITE)
-        settable_asm_flags |=
-          PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
-#endif /* 0 */
-
-    return settable_asm_flags;  /* _theoretically_ settable capabilities only */
+    /* obsolete, to be removed from libpng-1.4.0 */
+    flag_select=flag_select;
+    return 0L;
 }
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
 
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
     /* GRR:  could add this:   && defined(PNG_MMX_CODE_SUPPORTED) */
 /* this function was added to libpng 1.2.0 */
 png_uint_32 PNGAPI
 png_get_mmx_flagmask (int flag_select, int *compilerID)
 {
-    png_uint_32 settable_mmx_flags = 0;
-
-    if (flag_select & PNG_SELECT_READ)
-        settable_mmx_flags |=
-          PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  |
-          PNG_ASM_FLAG_MMX_READ_INTERLACE    |
-          PNG_ASM_FLAG_MMX_READ_FILTER_SUB   |
-          PNG_ASM_FLAG_MMX_READ_FILTER_UP    |
-          PNG_ASM_FLAG_MMX_READ_FILTER_AVG   |
-          PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
-#if 0
-    /* GRR:  no MMX write support yet, but someday... */
-    if (flag_select & PNG_SELECT_WRITE)
-        settable_mmx_flags |=
-          PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
-#endif /* 0 */
-
-    if (compilerID != NULL) {
-#ifdef PNG_USE_PNGVCRD
-        *compilerID = 1;    /* MSVC */
-#else
-#ifdef PNG_USE_PNGGCCRD
-        *compilerID = 2;    /* gcc/gas */
-#else
-        *compilerID = -1;   /* unknown (i.e., no asm/MMX code compiled) */
-#endif
-#endif
-    }
-
-    return settable_mmx_flags;  /* _theoretically_ settable capabilities only */
+    /* obsolete, to be removed from libpng-1.4.0 */
+    flag_select=flag_select;
+    *compilerID = -1;   /* unknown (i.e., no asm/MMX code compiled) */
+    return 0L;
 }
 
 /* this function was added to libpng 1.2.0 */
 png_byte PNGAPI
 png_get_mmx_bitdepth_threshold (png_structp png_ptr)
 {
-    return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0);
+    /* obsolete, to be removed from libpng-1.4.0 */
+    return (png_ptr? 0: 0);
 }
 
 /* this function was added to libpng 1.2.0 */
 png_uint_32 PNGAPI
 png_get_mmx_rowbytes_threshold (png_structp png_ptr)
 {
-    return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L);
+    /* obsolete, to be removed from libpng-1.4.0 */
+    return (png_ptr? 0L: 0L);
 }
+#endif /* ?PNG_1_0_X */
 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
 
 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
-/* these functions were added to libpng 1.2.6 */
+/* These functions were added to libpng 1.2.6 */
 png_uint_32 PNGAPI
 png_get_user_width_max (png_structp png_ptr)
 {
@@ -930,5 +895,6 @@ png_get_user_height_max (png_structp png_ptr)
     return (png_ptr? png_ptr->user_height_max : 0);
 }
 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
+ 
 
-#endif /* ?PNG_1_0_X */
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

pngmem.c

@@ -1,9 +1,9 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * libpng version 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.30 [August 15, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  *
@@ -16,6 +16,7 @@
 
 #define PNG_INTERNAL
 #include "png.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
 /* Borland DOS special memory handler */
 #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
@@ -46,7 +47,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
      return (png_get_copyright(NULL));
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(malloc_fn != NULL)
+   if (malloc_fn != NULL)
    {
       png_struct dummy_struct;
       png_structp png_ptr = &dummy_struct;
@@ -78,7 +79,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
    if (struct_ptr != NULL)
    {
 #ifdef PNG_USER_MEM_SUPPORTED
-      if(free_fn != NULL)
+      if (free_fn != NULL)
       {
          png_struct dummy_struct;
          png_structp png_ptr = &dummy_struct;
@@ -120,7 +121,7 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
       return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(png_ptr->malloc_fn != NULL)
+   if (png_ptr->malloc_fn != NULL)
        ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
    else
        ret = (png_malloc_default(png_ptr, size));
@@ -135,6 +136,9 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
    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)
    {
@@ -166,7 +170,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
                ret = NULL;
             }
 
-            if(png_ptr->zlib_window_bits > 14)
+            if (png_ptr->zlib_window_bits > 14)
                num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
             else
                num_blocks = 1;
@@ -205,7 +209,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 
             png_ptr->offset_table = table;
             png_ptr->offset_table_ptr = farmalloc(num_blocks *
-               png_sizeof (png_bytep));
+               png_sizeof(png_bytep));
 
             if (png_ptr->offset_table_ptr == NULL)
             {
@@ -268,6 +272,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 /* 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. */
+
 void PNGAPI
 png_free(png_structp png_ptr, png_voidp ptr)
 {
@@ -288,6 +293,8 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
 
+   if (png_ptr == NULL || ptr == NULL) return;
+
    if (png_ptr->offset_table != NULL)
    {
       int i;
@@ -346,7 +353,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
       return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(malloc_fn != NULL)
+   if (malloc_fn != NULL)
    {
       png_struct dummy_struct;
       png_structp png_ptr = &dummy_struct;
@@ -362,7 +369,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
    struct_ptr = (png_voidp)farmalloc(size);
 #else
 # if defined(_MSC_VER) && defined(MAXSEG_64K)
-   struct_ptr = (png_voidp)halloc(size,1);
+   struct_ptr = (png_voidp)halloc(size, 1);
 # else
    struct_ptr = (png_voidp)malloc(size);
 # endif
@@ -391,7 +398,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
    if (struct_ptr != NULL)
    {
 #ifdef PNG_USER_MEM_SUPPORTED
-      if(free_fn != NULL)
+      if (free_fn != NULL)
       {
          png_struct dummy_struct;
          png_structp png_ptr = &dummy_struct;
@@ -427,7 +434,7 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
    if (png_ptr == NULL || size == 0)
       return (NULL);
 
-   if(png_ptr->malloc_fn != NULL)
+   if (png_ptr->malloc_fn != NULL)
        ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
    else
        ret = (png_malloc_default(png_ptr, size));
@@ -449,7 +456,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
    if (size > (png_uint_32)65536L)
    {
 #ifndef PNG_USER_MEM_SUPPORTED
-      if(png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+      if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
          png_error(png_ptr, "Cannot Allocate > 64K");
       else
 #endif
@@ -534,8 +541,10 @@ png_voidp PNGAPI
 png_malloc_warn(png_structp png_ptr, png_uint_32 size)
 {
    png_voidp ptr;
-   png_uint_32 save_flags=png_ptr->flags;
+   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;
@@ -551,7 +560,7 @@ png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
 
    size = (png_size_t)length;
    if ((png_uint_32)size != length)
-      png_error(png_ptr,"Overflow in png_memcpy_check.");
+      png_error(png_ptr, "Overflow in png_memcpy_check.");
 
    return(png_memcpy (s1, s2, size));
 }
@@ -564,7 +573,7 @@ png_memset_check (png_structp png_ptr, png_voidp s1, int value,
 
    size = (png_size_t)length;
    if ((png_uint_32)size != length)
-      png_error(png_ptr,"Overflow in png_memset_check.");
+      png_error(png_ptr, "Overflow in png_memset_check.");
 
    return (png_memset (s1, value, size));
 
@@ -578,9 +587,12 @@ void PNGAPI
 png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
   malloc_fn, png_free_ptr free_fn)
 {
-   png_ptr->mem_ptr = mem_ptr;
-   png_ptr->malloc_fn = malloc_fn;
-   png_ptr->free_fn = free_fn;
+   if (png_ptr != NULL)
+   {
+      png_ptr->mem_ptr = mem_ptr;
+      png_ptr->malloc_fn = malloc_fn;
+      png_ptr->free_fn = free_fn;
+   }
 }
 
 /* This function returns a pointer to the mem_ptr associated with the user
@@ -590,6 +602,8 @@ png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
 png_voidp PNGAPI
 png_get_mem_ptr(png_structp png_ptr)
 {
+   if (png_ptr == NULL) return (NULL);
    return ((png_voidp)png_ptr->mem_ptr);
 }
 #endif /* PNG_USER_MEM_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

pngpread.c

@@ -1,16 +1,15 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * libpng version 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.32 [September 18, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  */
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
 
 /* push model modes */
@@ -28,6 +27,7 @@ void PNGAPI
 png_process_data(png_structp png_ptr, png_infop info_ptr,
    png_bytep buffer, png_size_t buffer_size)
 {
+   if (png_ptr == NULL || info_ptr == NULL) return;
    png_push_restore_buffer(png_ptr, buffer, buffer_size);
 
    while (png_ptr->buffer_size)
@@ -42,6 +42,7 @@ png_process_data(png_structp png_ptr, png_infop info_ptr,
 void /* PRIVATE */
 png_process_some_data(png_structp png_ptr, png_infop info_ptr)
 {
+   if (png_ptr == NULL) return;
    switch (png_ptr->process_mode)
    {
       case PNG_READ_SIG_MODE:
@@ -112,7 +113,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
 
    png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
       num_to_check);
-   png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes+num_to_check);
+   png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check);
 
    if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
    {
@@ -135,60 +136,60 @@ void /* PRIVATE */
 png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-      PNG_IHDR;
-      PNG_IDAT;
-      PNG_IEND;
-      PNG_PLTE;
+      PNG_CONST PNG_IHDR;
+      PNG_CONST PNG_IDAT;
+      PNG_CONST PNG_IEND;
+      PNG_CONST PNG_PLTE;
 #if defined(PNG_READ_bKGD_SUPPORTED)
-      PNG_bKGD;
+      PNG_CONST PNG_bKGD;
 #endif
 #if defined(PNG_READ_cHRM_SUPPORTED)
-      PNG_cHRM;
+      PNG_CONST PNG_cHRM;
 #endif
 #if defined(PNG_READ_gAMA_SUPPORTED)
-      PNG_gAMA;
+      PNG_CONST PNG_gAMA;
 #endif
 #if defined(PNG_READ_hIST_SUPPORTED)
-      PNG_hIST;
+      PNG_CONST PNG_hIST;
 #endif
 #if defined(PNG_READ_iCCP_SUPPORTED)
-      PNG_iCCP;
+      PNG_CONST PNG_iCCP;
 #endif
 #if defined(PNG_READ_iTXt_SUPPORTED)
-      PNG_iTXt;
+      PNG_CONST PNG_iTXt;
 #endif
 #if defined(PNG_READ_oFFs_SUPPORTED)
-      PNG_oFFs;
+      PNG_CONST PNG_oFFs;
 #endif
 #if defined(PNG_READ_pCAL_SUPPORTED)
-      PNG_pCAL;
+      PNG_CONST PNG_pCAL;
 #endif
 #if defined(PNG_READ_pHYs_SUPPORTED)
-      PNG_pHYs;
+      PNG_CONST PNG_pHYs;
 #endif
 #if defined(PNG_READ_sBIT_SUPPORTED)
-      PNG_sBIT;
+      PNG_CONST PNG_sBIT;
 #endif
 #if defined(PNG_READ_sCAL_SUPPORTED)
-      PNG_sCAL;
+      PNG_CONST PNG_sCAL;
 #endif
 #if defined(PNG_READ_sRGB_SUPPORTED)
-      PNG_sRGB;
+      PNG_CONST PNG_sRGB;
 #endif
 #if defined(PNG_READ_sPLT_SUPPORTED)
-      PNG_sPLT;
+      PNG_CONST PNG_sPLT;
 #endif
 #if defined(PNG_READ_tEXt_SUPPORTED)
-      PNG_tEXt;
+      PNG_CONST PNG_tEXt;
 #endif
 #if defined(PNG_READ_tIME_SUPPORTED)
-      PNG_tIME;
+      PNG_CONST PNG_tIME;
 #endif
 #if defined(PNG_READ_tRNS_SUPPORTED)
-      PNG_tRNS;
+      PNG_CONST PNG_tRNS;
 #endif
 #if defined(PNG_READ_zTXt_SUPPORTED)
-      PNG_zTXt;
+      PNG_CONST PNG_zTXt;
 #endif
 #endif /* PNG_USE_LOCAL_ARRAYS */
    /* First we make sure we have enough data for the 4 byte chunk name
@@ -208,14 +209,21 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
       }
 
       png_push_fill_buffer(png_ptr, chunk_length, 4);
-      png_ptr->push_length = png_get_uint_31(png_ptr,chunk_length);
+      png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
       png_reset_crc(png_ptr);
       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+      png_check_chunk_name(png_ptr, png_ptr->chunk_name);
       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
    }
 
+   if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+     if (png_ptr->mode & PNG_AFTER_IDAT)
+        png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
+
    if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
    {
+      if (png_ptr->push_length != 13)
+         png_error(png_ptr, "Invalid IHDR length");
       if (png_ptr->push_length + 4 > png_ptr->buffer_size)
       {
          png_push_save_buffer(png_ptr);
@@ -267,7 +275,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
       }
       png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
    }
-   else if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
+   else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
    {
       /* If we reach an IDAT chunk, this means we have read all of the
        * header chunks, and we can start reading the image (or if this
@@ -281,8 +289,9 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
 
       if (png_ptr->mode & PNG_HAVE_IDAT)
       {
-         if (png_ptr->push_length == 0)
-            return;
+         if (!(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
+           if (png_ptr->push_length == 0)
+              return;
 
          if (png_ptr->mode & PNG_AFTER_IDAT)
             png_error(png_ptr, "Too many IDAT's found");
@@ -556,6 +565,7 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
 {
    png_bytep ptr;
 
+   if (png_ptr == NULL) return;
    ptr = buffer;
    if (png_ptr->save_buffer_size)
    {
@@ -596,7 +606,7 @@ png_push_save_buffer(png_structp png_ptr)
    {
       if (png_ptr->save_buffer_ptr != png_ptr->save_buffer)
       {
-         png_size_t i,istop;
+         png_size_t i, istop;
          png_bytep sp;
          png_bytep dp;
 
@@ -614,7 +624,7 @@ png_push_save_buffer(png_structp png_ptr)
       png_size_t new_max;
       png_bytep old_buffer;
 
-      if (png_ptr->save_buffer_size > PNG_SIZE_MAX - 
+      if (png_ptr->save_buffer_size > PNG_SIZE_MAX -
          (png_ptr->current_buffer_size + 256))
       {
         png_error(png_ptr, "Potential overflow of save_buffer");
@@ -652,7 +662,7 @@ void /* PRIVATE */
 png_push_read_IDAT(png_structp png_ptr)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_IDAT;
+   PNG_CONST PNG_IDAT;
 #endif
    if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
    {
@@ -665,12 +675,12 @@ png_push_read_IDAT(png_structp png_ptr)
       }
 
       png_push_fill_buffer(png_ptr, chunk_length, 4);
-      png_ptr->push_length = png_get_uint_31(png_ptr,chunk_length);
+      png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
       png_reset_crc(png_ptr);
       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
 
-      if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
+      if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
       {
          png_ptr->process_mode = PNG_READ_CHUNK_MODE;
          if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
@@ -688,7 +698,7 @@ png_push_read_IDAT(png_structp png_ptr)
       {
          save_size = (png_size_t)png_ptr->idat_size;
          /* check for overflow */
-         if((png_uint_32)save_size != png_ptr->idat_size)
+         if ((png_uint_32)save_size != png_ptr->idat_size)
             png_error(png_ptr, "save_size overflowed in pngpread");
       }
       else
@@ -710,7 +720,7 @@ png_push_read_IDAT(png_structp png_ptr)
       {
          save_size = (png_size_t)png_ptr->idat_size;
          /* check for overflow */
-         if((png_uint_32)save_size != png_ptr->idat_size)
+         if ((png_uint_32)save_size != png_ptr->idat_size)
             png_error(png_ptr, "save_size overflowed in pngpread");
       }
       else
@@ -750,7 +760,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
 
    png_ptr->zstream.next_in = buffer;
    png_ptr->zstream.avail_in = (uInt)buffer_length;
-   for(;;)
+   for (;;)
    {
       ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
       if (ret != Z_OK)
@@ -982,25 +992,20 @@ png_read_push_finish_row(png_structp png_ptr)
    /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
 
    /* start of interlace block */
-   const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
+   PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
 
    /* offset to next interlace block */
-   const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
+   PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
 
    /* start of interlace block in the y direction */
-   const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
+   PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
 
    /* offset to next interlace block in the y direction */
-   const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
-
-   /* Width of interlace block.  This is not currently used - if you need
-    * it, uncomment it here and in png.h
-   const int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-   */
+   PNG_CONST int FARDATA 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
-   const int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
+   PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
    */
 #endif
 
@@ -1054,8 +1059,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
    if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
       {
          png_error(png_ptr, "Out of place tEXt");
-         /* to quiet some compiler warnings */
-         if(info_ptr == NULL) return;
+         info_ptr = info_ptr; /* to quiet some compiler warnings */
       }
 
 #ifdef PNG_MAX_MALLOC_64K
@@ -1070,7 +1074,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
 #endif
 
    png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-         (png_uint_32)(length+1));
+      (png_uint_32)(length + 1));
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1118,7 +1122,7 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
       for (text = key; *text; text++)
          /* empty loop */ ;
 
-      if (text != key + png_ptr->current_text_size)
+      if (text < key + png_ptr->current_text_size)
          text++;
 
       text_ptr = (png_textp)png_malloc(png_ptr,
@@ -1151,8 +1155,7 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
    if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
       {
          png_error(png_ptr, "Out of place zTXt");
-         /* to quiet some compiler warnings */
-         if(info_ptr == NULL) return;
+         info_ptr = info_ptr; /* to quiet some compiler warnings */
       }
 
 #ifdef PNG_MAX_MALLOC_64K
@@ -1169,7 +1172,7 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
 #endif
 
    png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-       (png_uint_32)(length+1));
+      (png_uint_32)(length + 1));
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1214,7 +1217,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
          /* empty loop */ ;
 
       /* zTXt can't have zero text */
-      if (text == key + png_ptr->current_text_size)
+      if (text >= key + png_ptr->current_text_size)
       {
          png_ptr->current_text = NULL;
          png_free(png_ptr, key);
@@ -1260,8 +1263,8 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
             if (text == NULL)
             {
                text = (png_charp)png_malloc(png_ptr,
-                  (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
-                     + key_size + 1));
+                     (png_uint_32)(png_ptr->zbuf_size
+                     - png_ptr->zstream.avail_out + key_size + 1));
                png_memcpy(text + key_size, png_ptr->zbuf,
                   png_ptr->zbuf_size - png_ptr->zstream.avail_out);
                png_memcpy(text, key, key_size);
@@ -1275,8 +1278,8 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
 
                tmp = text;
                text = (png_charp)png_malloc(png_ptr, text_size +
-                  (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
-                   + 1));
+                  (png_uint_32)(png_ptr->zbuf_size 
+                  - png_ptr->zstream.avail_out + 1));
                png_memcpy(text, tmp, text_size);
                png_free(png_ptr, tmp);
                png_memcpy(text + text_size, png_ptr->zbuf,
@@ -1344,8 +1347,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
    if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
       {
          png_error(png_ptr, "Out of place iTXt");
-         /* to quiet some compiler warnings */
-         if(info_ptr == NULL) return;
+         info_ptr = info_ptr; /* to quiet some compiler warnings */
       }
 
 #ifdef PNG_MAX_MALLOC_64K
@@ -1360,7 +1362,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
 #endif
 
    png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-         (png_uint_32)(length+1));
+      (png_uint_32)(length + 1));
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1412,7 +1414,7 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
       for (lang = key; *lang; lang++)
          /* empty loop */ ;
 
-      if (lang != key + png_ptr->current_text_size)
+      if (lang < key + png_ptr->current_text_size - 3)
          lang++;
 
       comp_flag = *lang++;
@@ -1422,10 +1424,14 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
          /* empty loop */ ;
       lang_key++;        /* skip NUL separator */
 
-      for (text = lang_key; *text; text++)
-         /* empty loop */ ;
+      text=lang_key;
+      if (lang_key < key + png_ptr->current_text_size - 1)
+      {
+        for (; *text; text++)
+           /* empty loop */ ;
+      }
 
-      if (text != key + png_ptr->current_text_size)
+      if (text < key + png_ptr->current_text_size)
          text++;
 
       text_ptr = (png_textp)png_malloc(png_ptr,
@@ -1457,61 +1463,73 @@ void /* PRIVATE */
 png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
    length)
 {
-   png_uint_32 skip=0;
-   png_check_chunk_name(png_ptr, png_ptr->chunk_name);
+   png_uint_32 skip = 0;
 
    if (!(png_ptr->chunk_name[0] & 0x20))
    {
 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
-      if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
-           PNG_HANDLE_CHUNK_ALWAYS
+      if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+         PNG_HANDLE_CHUNK_ALWAYS
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-           && png_ptr->read_user_chunk_fn == NULL
+         && png_ptr->read_user_chunk_fn == NULL
 #endif
          )
 #endif
          png_chunk_error(png_ptr, "unknown critical chunk");
 
-      /* to quiet compiler warnings about unused info_ptr */
-      if (info_ptr == NULL)
-         return;
+      info_ptr = info_ptr; /* to quiet some compiler warnings */
    }
 
 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
    if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
    {
-       png_unknown_chunk chunk;
-
 #ifdef PNG_MAX_MALLOC_64K
-       if (length > (png_uint_32)65535L)
-       {
-           png_warning(png_ptr, "unknown chunk too large to fit in memory");
-           skip = length - (png_uint_32)65535L;
-           length = (png_uint_32)65535L;
-       }
+      if (length > (png_uint_32)65535L)
+      {
+          png_warning(png_ptr, "unknown chunk too large to fit in memory");
+          skip = length - (png_uint_32)65535L;
+          length = (png_uint_32)65535L;
+      }
 #endif
+      png_memcpy((png_charp)png_ptr->unknown_chunk.name,
+                 (png_charp)png_ptr->chunk_name, 
+                 png_sizeof(png_ptr->unknown_chunk.name));
+      png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name) - 1]
+        = '\0';
 
-       png_strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name);
-       chunk.data = (png_bytep)png_malloc(png_ptr, length);
-       png_crc_read(png_ptr, chunk.data, length);
-       chunk.size = length;
+      png_ptr->unknown_chunk.size = (png_size_t)length;
+      if (length == 0)
+         png_ptr->unknown_chunk.data = NULL;
+      else
+      {
+         png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
+       (png_uint_32)length);
+         png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
+      }
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-       if(png_ptr->read_user_chunk_fn != NULL)
-       {
-          /* callback to user unknown chunk handler */
-          if ((*(png_ptr->read_user_chunk_fn)) (png_ptr, &chunk) <= 0)
-          {
-             if (!(png_ptr->chunk_name[0] & 0x20))
-                if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
-                     PNG_HANDLE_CHUNK_ALWAYS)
-                   png_chunk_error(png_ptr, "unknown critical chunk");
-          }
-             png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1);
-       }
-       else
+      if (png_ptr->read_user_chunk_fn != NULL)
+      {
+         /* callback to user unknown chunk handler */
+         int ret;
+         ret = (*(png_ptr->read_user_chunk_fn))
+           (png_ptr, &png_ptr->unknown_chunk);
+         if (ret < 0)
+            png_chunk_error(png_ptr, "error in user chunk");
+         if (ret == 0)
+         {
+            if (!(png_ptr->chunk_name[0] & 0x20))
+               if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+                    PNG_HANDLE_CHUNK_ALWAYS)
+                  png_chunk_error(png_ptr, "unknown critical chunk");
+            png_set_unknown_chunks(png_ptr, info_ptr,
+               &png_ptr->unknown_chunk, 1);
+         }
+      }
+      else
 #endif
-          png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1);
-       png_free(png_ptr, chunk.data);
+        png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
+      png_free(png_ptr, png_ptr->unknown_chunk.data);
+      png_ptr->unknown_chunk.data = NULL;
    }
    else
 #endif
@@ -1546,9 +1564,10 @@ png_progressive_combine_row (png_structp png_ptr,
    png_bytep old_row, png_bytep new_row)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   const int FARDATA png_pass_dsp_mask[7] =
+   PNG_CONST int FARDATA png_pass_dsp_mask[7] =
       {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
 #endif
+   if (png_ptr == NULL) return;
    if (new_row != NULL)    /* new_row must == png_ptr->row_buf here. */
       png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
 }
@@ -1558,6 +1577,7 @@ png_set_progressive_read_fn(png_structp 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) return;
    png_ptr->info_fn = info_fn;
    png_ptr->row_fn = row_fn;
    png_ptr->end_fn = end_fn;
@@ -1568,6 +1588,7 @@ png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
 png_voidp PNGAPI
 png_get_progressive_ptr(png_structp png_ptr)
 {
+   if (png_ptr == NULL) return (NULL);
    return png_ptr->io_ptr;
 }
 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */

pngread.c

@@ -1,9 +1,9 @@
 
 /* pngread.c - read a PNG file
  *
- * libpng 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.35 [February 12, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2009 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.)
  *
@@ -13,6 +13,7 @@
 
 #define PNG_INTERNAL
 #include "png.h"
+#if defined(PNG_READ_SUPPORTED)
 
 /* Create a PNG structure for reading, and allocate any memory needed. */
 png_structp PNGAPI
@@ -33,6 +34,9 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
 
+#ifdef PNG_SETJMP_SUPPORTED
+   volatile
+#endif
    png_structp png_ptr;
 
 #ifdef PNG_SETJMP_SUPPORTED
@@ -43,7 +47,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 
    int i;
 
-   png_debug(1, "in png_create_read_struct\n");
+   png_debug(1, "in png_create_read_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);
@@ -53,12 +57,6 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    if (png_ptr == NULL)
       return (NULL);
 
-#if !defined(PNG_1_0_X)
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
-   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
-#endif
-#endif /* PNG_1_0_X */
-
    /* added at libpng-1.2.6 */
 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
    png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
@@ -73,9 +71,9 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 #endif
    {
       png_free(png_ptr, png_ptr->zbuf);
-      png_ptr->zbuf=NULL;
+      png_ptr->zbuf = NULL;
 #ifdef PNG_USER_MEM_SUPPORTED
-      png_destroy_struct_2((png_voidp)png_ptr, 
+      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);
@@ -83,7 +81,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
       return (NULL);
    }
 #ifdef USE_FAR_KEYWORD
-   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
 #endif
 #endif
 
@@ -93,12 +91,18 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 
    png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
 
-   i=0;
-   do
+   if (user_png_ver)
    {
-     if(user_png_ver[i] != png_libpng_ver[i])
+     i = 0;
+     do
+     {
+       if (user_png_ver[i] != png_libpng_ver[i])
+          png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
+     } while (png_libpng_ver[i++]);
+   }
+   else
         png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
-   } while (png_libpng_ver[i++]);
+   
 
    if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
    {
@@ -115,16 +119,18 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
         char msg[80];
         if (user_png_ver)
         {
-          sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+          png_snprintf(msg, 80,
+             "Application was compiled with png.h from libpng-%.20s",
              user_png_ver);
           png_warning(png_ptr, msg);
         }
-        sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
+        png_snprintf(msg, 80,
+             "Application  is  running with png.c from libpng-%.20s",
            png_libpng_ver);
         png_warning(png_ptr, msg);
 #endif
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
-        png_ptr->flags=0;
+        png_ptr->flags = 0;
 #endif
         png_error(png_ptr,
            "Incompatible libpng version in application and library");
@@ -160,7 +166,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
       PNG_ABORT();
-   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
 #else
    if (setjmp(png_ptr->jmpbuf))
       PNG_ABORT();
@@ -169,10 +175,10 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    return (png_ptr);
 }
 
+#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
 /* Initialize PNG structure for reading, and allocate any memory needed.
    This interface is deprecated in favour of the png_create_read_struct(),
-   and it will eventually disappear. */
-#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
+   and it will disappear as of libpng-1.3.0. */
 #undef png_read_init
 void PNGAPI
 png_read_init(png_structp png_ptr)
@@ -180,50 +186,53 @@ png_read_init(png_structp png_ptr)
    /* We only come here via pre-1.0.7-compiled applications */
    png_read_init_2(png_ptr, "1.0.6 or earlier", 0, 0);
 }
-#endif
 
 void PNGAPI
 png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver,
    png_size_t png_struct_size, png_size_t png_info_size)
 {
    /* We only come here via pre-1.0.12-compiled applications */
+   if (png_ptr == NULL) return;
 #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
-   if(png_sizeof(png_struct) > png_struct_size || 
+   if (png_sizeof(png_struct) > png_struct_size ||
       png_sizeof(png_info) > png_info_size)
    {
       char msg[80];
-      png_ptr->warning_fn=NULL;
+      png_ptr->warning_fn = NULL;
       if (user_png_ver)
       {
-        sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+        png_snprintf(msg, 80,
+           "Application was compiled with png.h from libpng-%.20s",
            user_png_ver);
         png_warning(png_ptr, msg);
       }
-      sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
+      png_snprintf(msg, 80,
+         "Application  is  running with png.c from libpng-%.20s",
          png_libpng_ver);
       png_warning(png_ptr, msg);
    }
 #endif
-   if(png_sizeof(png_struct) > png_struct_size)
+   if (png_sizeof(png_struct) > png_struct_size)
      {
-       png_ptr->error_fn=NULL;
+       png_ptr->error_fn = NULL;
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
-       png_ptr->flags=0;
+       png_ptr->flags = 0;
 #endif
        png_error(png_ptr,
        "The png struct allocated by the application for reading is too small.");
      }
-   if(png_sizeof(png_info) > png_info_size)
+   if (png_sizeof(png_info) > png_info_size)
      {
-       png_ptr->error_fn=NULL;
+       png_ptr->error_fn = NULL;
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
-       png_ptr->flags=0;
+       png_ptr->flags = 0;
 #endif
        png_error(png_ptr,
          "The info struct allocated by application for reading is too small.");
      }
    png_read_init_3(&png_ptr, user_png_ver, png_struct_size);
 }
+#endif /* PNG_1_0_X || PNG_1_2_X */
 
 void PNGAPI
 png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
@@ -233,18 +242,20 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
    jmp_buf tmp_jmp;  /* to save current jump buffer */
 #endif
 
-   int i=0;
+   int i = 0;
 
    png_structp png_ptr=*ptr_ptr;
 
+   if (png_ptr == NULL) return;
+
    do
    {
-     if(user_png_ver[i] != png_libpng_ver[i])
+     if (user_png_ver[i] != png_libpng_ver[i])
      {
 #ifdef PNG_LEGACY_SUPPORTED
        png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
 #else
-       png_ptr->warning_fn=NULL;
+       png_ptr->warning_fn = NULL;
        png_warning(png_ptr,
         "Application uses deprecated png_read_init() and should be recompiled.");
        break;
@@ -252,26 +263,26 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
      }
    } while (png_libpng_ver[i++]);
 
-   png_debug(1, "in png_read_init_3\n");
+   png_debug(1, "in png_read_init_3");
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* save jump buffer and error functions */
-   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
+   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
 #endif
 
-   if(png_sizeof(png_struct) > png_struct_size)
-     {
-       png_destroy_struct(png_ptr);
-       *ptr_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
-       png_ptr = *ptr_ptr;
-     }
+   if (png_sizeof(png_struct) > png_struct_size)
+   {
+      png_destroy_struct(png_ptr);
+      *ptr_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
+      png_ptr = *ptr_ptr;
+   }
 
    /* reset all variables to 0 */
-   png_memset(png_ptr, 0, png_sizeof (png_struct));
+   png_memset(png_ptr, 0, png_sizeof(png_struct));
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* restore jump buffer */
-   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
 #endif
 
    /* added at libpng-1.2.6 */
@@ -315,7 +326,8 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
 void PNGAPI
 png_read_info(png_structp png_ptr, png_infop info_ptr)
 {
-   png_debug(1, "in png_read_info\n");
+   if (png_ptr == NULL || info_ptr == NULL) return;
+   png_debug(1, "in png_read_info");
    /* If we haven't checked all of the PNG signature bytes, do so now. */
    if (png_ptr->sig_bytes < 8)
    {
@@ -337,93 +349,88 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
          png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
    }
 
-   for(;;)
+   for (;;)
    {
 #ifdef PNG_USE_LOCAL_ARRAYS
-      PNG_IHDR;
-      PNG_IDAT;
-      PNG_IEND;
-      PNG_PLTE;
+      PNG_CONST PNG_IHDR;
+      PNG_CONST PNG_IDAT;
+      PNG_CONST PNG_IEND;
+      PNG_CONST PNG_PLTE;
 #if defined(PNG_READ_bKGD_SUPPORTED)
-      PNG_bKGD;
+      PNG_CONST PNG_bKGD;
 #endif
 #if defined(PNG_READ_cHRM_SUPPORTED)
-      PNG_cHRM;
+      PNG_CONST PNG_cHRM;
 #endif
 #if defined(PNG_READ_gAMA_SUPPORTED)
-      PNG_gAMA;
+      PNG_CONST PNG_gAMA;
 #endif
 #if defined(PNG_READ_hIST_SUPPORTED)
-      PNG_hIST;
+      PNG_CONST PNG_hIST;
 #endif
 #if defined(PNG_READ_iCCP_SUPPORTED)
-      PNG_iCCP;
+      PNG_CONST PNG_iCCP;
 #endif
 #if defined(PNG_READ_iTXt_SUPPORTED)
-      PNG_iTXt;
+      PNG_CONST PNG_iTXt;
 #endif
 #if defined(PNG_READ_oFFs_SUPPORTED)
-      PNG_oFFs;
+      PNG_CONST PNG_oFFs;
 #endif
 #if defined(PNG_READ_pCAL_SUPPORTED)
-      PNG_pCAL;
+      PNG_CONST PNG_pCAL;
 #endif
 #if defined(PNG_READ_pHYs_SUPPORTED)
-      PNG_pHYs;
+      PNG_CONST PNG_pHYs;
 #endif
 #if defined(PNG_READ_sBIT_SUPPORTED)
-      PNG_sBIT;
+      PNG_CONST PNG_sBIT;
 #endif
 #if defined(PNG_READ_sCAL_SUPPORTED)
-      PNG_sCAL;
+      PNG_CONST PNG_sCAL;
 #endif
 #if defined(PNG_READ_sPLT_SUPPORTED)
-      PNG_sPLT;
+      PNG_CONST PNG_sPLT;
 #endif
 #if defined(PNG_READ_sRGB_SUPPORTED)
-      PNG_sRGB;
+      PNG_CONST PNG_sRGB;
 #endif
 #if defined(PNG_READ_tEXt_SUPPORTED)
-      PNG_tEXt;
+      PNG_CONST PNG_tEXt;
 #endif
 #if defined(PNG_READ_tIME_SUPPORTED)
-      PNG_tIME;
+      PNG_CONST PNG_tIME;
 #endif
 #if defined(PNG_READ_tRNS_SUPPORTED)
-      PNG_tRNS;
+      PNG_CONST PNG_tRNS;
 #endif
 #if defined(PNG_READ_zTXt_SUPPORTED)
-      PNG_zTXt;
+      PNG_CONST PNG_zTXt;
 #endif
 #endif /* PNG_USE_LOCAL_ARRAYS */
-      png_byte chunk_length[4];
-      png_uint_32 length;
-
-      png_read_data(png_ptr, chunk_length, 4);
-      length = png_get_uint_31(png_ptr,chunk_length);
-
-      png_reset_crc(png_ptr);
-      png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-
-      png_debug2(0, "Reading %s chunk, length=%lu.\n", png_ptr->chunk_name,
-         length);
+      png_uint_32 length = png_read_chunk_header(png_ptr);
+      PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
 
       /* This should be a binary subdivision search or a hash for
        * matching the chunk name rather than a linear search.
        */
-      if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
+      if (!png_memcmp(chunk_name, png_IDAT, 4))
+        if (png_ptr->mode & PNG_AFTER_IDAT)
+          png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
+
+      if (!png_memcmp(chunk_name, png_IHDR, 4))
          png_handle_IHDR(png_ptr, info_ptr, length);
-      else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
+      else if (!png_memcmp(chunk_name, png_IEND, 4))
          png_handle_IEND(png_ptr, info_ptr, length);
 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-      else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
+      else if (png_handle_as_unknown(png_ptr, chunk_name))
       {
-         if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+         if (!png_memcmp(chunk_name, png_IDAT, 4))
             png_ptr->mode |= PNG_HAVE_IDAT;
          png_handle_unknown(png_ptr, info_ptr, length);
-         if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+         if (!png_memcmp(chunk_name, png_PLTE, 4))
             png_ptr->mode |= PNG_HAVE_PLTE;
-         else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+         else if (!png_memcmp(chunk_name, png_IDAT, 4))
          {
             if (!(png_ptr->mode & PNG_HAVE_IHDR))
                png_error(png_ptr, "Missing IHDR before IDAT");
@@ -434,9 +441,9 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
          }
       }
 #endif
-      else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+      else if (!png_memcmp(chunk_name, png_PLTE, 4))
          png_handle_PLTE(png_ptr, info_ptr, length);
-      else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+      else if (!png_memcmp(chunk_name, png_IDAT, 4))
       {
          if (!(png_ptr->mode & PNG_HAVE_IHDR))
             png_error(png_ptr, "Missing IHDR before IDAT");
@@ -449,71 +456,71 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
          break;
       }
 #if defined(PNG_READ_bKGD_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
+      else if (!png_memcmp(chunk_name, png_bKGD, 4))
          png_handle_bKGD(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_cHRM_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
+      else if (!png_memcmp(chunk_name, png_cHRM, 4))
          png_handle_cHRM(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_gAMA_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
+      else if (!png_memcmp(chunk_name, png_gAMA, 4))
          png_handle_gAMA(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_hIST_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
+      else if (!png_memcmp(chunk_name, png_hIST, 4))
          png_handle_hIST(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_oFFs_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
+      else if (!png_memcmp(chunk_name, png_oFFs, 4))
          png_handle_oFFs(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_pCAL_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
+      else if (!png_memcmp(chunk_name, png_pCAL, 4))
          png_handle_pCAL(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sCAL_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
+      else if (!png_memcmp(chunk_name, png_sCAL, 4))
          png_handle_sCAL(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_pHYs_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
+      else if (!png_memcmp(chunk_name, png_pHYs, 4))
          png_handle_pHYs(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sBIT_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
+      else if (!png_memcmp(chunk_name, png_sBIT, 4))
          png_handle_sBIT(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sRGB_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
+      else if (!png_memcmp(chunk_name, png_sRGB, 4))
          png_handle_sRGB(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_iCCP_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
+      else if (!png_memcmp(chunk_name, png_iCCP, 4))
          png_handle_iCCP(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sPLT_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
+      else if (!png_memcmp(chunk_name, png_sPLT, 4))
          png_handle_sPLT(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tEXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
+      else if (!png_memcmp(chunk_name, png_tEXt, 4))
          png_handle_tEXt(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tIME_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
+      else if (!png_memcmp(chunk_name, png_tIME, 4))
          png_handle_tIME(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tRNS_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
+      else if (!png_memcmp(chunk_name, png_tRNS, 4))
          png_handle_tRNS(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_zTXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
+      else if (!png_memcmp(chunk_name, png_zTXt, 4))
          png_handle_zTXt(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_iTXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
+      else if (!png_memcmp(chunk_name, png_iTXt, 4))
          png_handle_iTXt(png_ptr, info_ptr, length);
 #endif
       else
@@ -526,7 +533,8 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
 void PNGAPI
 png_read_update_info(png_structp png_ptr, png_infop info_ptr)
 {
-   png_debug(1, "in png_read_update_info\n");
+   png_debug(1, "in png_read_update_info");
+   if (png_ptr == NULL) return;
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
    else
@@ -544,7 +552,8 @@ png_read_update_info(png_structp png_ptr, png_infop info_ptr)
 void PNGAPI
 png_start_read_image(png_structp png_ptr)
 {
-   png_debug(1, "in png_start_read_image\n");
+   png_debug(1, "in png_start_read_image");
+   if (png_ptr == NULL) return;
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
 }
@@ -555,12 +564,14 @@ void PNGAPI
 png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_IDAT;
-   const int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
-   const int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
+   PNG_CONST PNG_IDAT;
+   PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
+      0xff};
+   PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
 #endif
    int ret;
-   png_debug2(1, "in png_read_row (row %lu, pass %d)\n",
+   if (png_ptr == NULL) return;
+   png_debug2(1, "in png_read_row (row %lu, pass %d)",
       png_ptr->row_number, png_ptr->pass);
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
@@ -685,15 +696,9 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
       {
          while (!png_ptr->idat_size)
          {
-            png_byte chunk_length[4];
-
             png_crc_finish(png_ptr, 0);
 
-            png_read_data(png_ptr, chunk_length, 4);
-            png_ptr->idat_size = png_get_uint_31(png_ptr,chunk_length);
-
-            png_reset_crc(png_ptr);
-            png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+            png_ptr->idat_size = png_read_chunk_header(png_ptr);
             if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
                png_error(png_ptr, "Not enough image data");
          }
@@ -729,16 +734,16 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
    png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
        png_ptr->row_info.width);
 
-   if(png_ptr->row_buf[0])
+   if (png_ptr->row_buf[0])
    png_read_filter_row(png_ptr, &(png_ptr->row_info),
       png_ptr->row_buf + 1, png_ptr->prev_row + 1,
       (int)(png_ptr->row_buf[0]));
 
    png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf,
       png_ptr->rowbytes + 1);
-   
+
 #if defined(PNG_MNG_FEATURES_SUPPORTED)
-   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+   if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
       (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
    {
       /* Intrapixel differencing */
@@ -806,7 +811,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
  * not called png_set_interlace_handling(), the display_row buffer will
  * be ignored, so pass NULL to it.
  *
- * [*] png_handle_alpha() does not exist yet, as of libpng version 1.2.8
+ * [*] png_handle_alpha() does not exist yet, as of this version of libpng
  */
 
 void PNGAPI
@@ -817,7 +822,8 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
    png_bytepp rp;
    png_bytepp dp;
 
-   png_debug(1, "in png_read_rows\n");
+   png_debug(1, "in png_read_rows");
+   if (png_ptr == NULL) return;
    rp = row;
    dp = display_row;
    if (rp != NULL && dp != NULL)
@@ -828,14 +834,14 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
 
          png_read_row(png_ptr, rptr, dptr);
       }
-   else if(rp != NULL)
+   else if (rp != NULL)
       for (i = 0; i < num_rows; i++)
       {
          png_bytep rptr = *rp;
          png_read_row(png_ptr, rptr, png_bytep_NULL);
          rp++;
       }
-   else if(dp != NULL)
+   else if (dp != NULL)
       for (i = 0; i < num_rows; i++)
       {
          png_bytep dptr = *dp;
@@ -856,16 +862,17 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
  * only call this function once.  If you desire to have an image for
  * each pass of a interlaced image, use png_read_rows() instead.
  *
- * [*] png_handle_alpha() does not exist yet, as of libpng version 1.2.8
+ * [*] 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_uint_32 i,image_height;
+   png_uint_32 i, image_height;
    int pass, j;
    png_bytepp rp;
 
-   png_debug(1, "in png_read_image\n");
+   png_debug(1, "in png_read_image");
+   if (png_ptr == NULL) return;
 
 #ifdef PNG_READ_INTERLACING_SUPPORTED
    pass = png_set_interlace_handling(png_ptr);
@@ -900,176 +907,166 @@ png_read_image(png_structp png_ptr, png_bytepp image)
 void PNGAPI
 png_read_end(png_structp png_ptr, png_infop info_ptr)
 {
-   png_byte chunk_length[4];
-   png_uint_32 length;
-
-   png_debug(1, "in png_read_end\n");
+   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 */
 
    do
    {
 #ifdef PNG_USE_LOCAL_ARRAYS
-      PNG_IHDR;
-      PNG_IDAT;
-      PNG_IEND;
-      PNG_PLTE;
+      PNG_CONST PNG_IHDR;
+      PNG_CONST PNG_IDAT;
+      PNG_CONST PNG_IEND;
+      PNG_CONST PNG_PLTE;
 #if defined(PNG_READ_bKGD_SUPPORTED)
-      PNG_bKGD;
+      PNG_CONST PNG_bKGD;
 #endif
 #if defined(PNG_READ_cHRM_SUPPORTED)
-      PNG_cHRM;
+      PNG_CONST PNG_cHRM;
 #endif
 #if defined(PNG_READ_gAMA_SUPPORTED)
-      PNG_gAMA;
+      PNG_CONST PNG_gAMA;
 #endif
 #if defined(PNG_READ_hIST_SUPPORTED)
-      PNG_hIST;
+      PNG_CONST PNG_hIST;
 #endif
 #if defined(PNG_READ_iCCP_SUPPORTED)
-      PNG_iCCP;
+      PNG_CONST PNG_iCCP;
 #endif
 #if defined(PNG_READ_iTXt_SUPPORTED)
-      PNG_iTXt;
+      PNG_CONST PNG_iTXt;
 #endif
 #if defined(PNG_READ_oFFs_SUPPORTED)
-      PNG_oFFs;
+      PNG_CONST PNG_oFFs;
 #endif
 #if defined(PNG_READ_pCAL_SUPPORTED)
-      PNG_pCAL;
+      PNG_CONST PNG_pCAL;
 #endif
 #if defined(PNG_READ_pHYs_SUPPORTED)
-      PNG_pHYs;
+      PNG_CONST PNG_pHYs;
 #endif
 #if defined(PNG_READ_sBIT_SUPPORTED)
-      PNG_sBIT;
+      PNG_CONST PNG_sBIT;
 #endif
 #if defined(PNG_READ_sCAL_SUPPORTED)
-      PNG_sCAL;
+      PNG_CONST PNG_sCAL;
 #endif
 #if defined(PNG_READ_sPLT_SUPPORTED)
-      PNG_sPLT;
+      PNG_CONST PNG_sPLT;
 #endif
 #if defined(PNG_READ_sRGB_SUPPORTED)
-      PNG_sRGB;
+      PNG_CONST PNG_sRGB;
 #endif
 #if defined(PNG_READ_tEXt_SUPPORTED)
-      PNG_tEXt;
+      PNG_CONST PNG_tEXt;
 #endif
 #if defined(PNG_READ_tIME_SUPPORTED)
-      PNG_tIME;
+      PNG_CONST PNG_tIME;
 #endif
 #if defined(PNG_READ_tRNS_SUPPORTED)
-      PNG_tRNS;
+      PNG_CONST PNG_tRNS;
 #endif
 #if defined(PNG_READ_zTXt_SUPPORTED)
-      PNG_zTXt;
+      PNG_CONST PNG_zTXt;
 #endif
 #endif /* PNG_USE_LOCAL_ARRAYS */
+      png_uint_32 length = png_read_chunk_header(png_ptr);
+      PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
 
-      png_read_data(png_ptr, chunk_length, 4);
-      length = png_get_uint_31(png_ptr,chunk_length);
-
-      png_reset_crc(png_ptr);
-      png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-
-      png_debug1(0, "Reading %s chunk.\n", png_ptr->chunk_name);
-
-      if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
+      if (!png_memcmp(chunk_name, png_IHDR, 4))
          png_handle_IHDR(png_ptr, info_ptr, length);
-      else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
+      else if (!png_memcmp(chunk_name, png_IEND, 4))
          png_handle_IEND(png_ptr, info_ptr, length);
 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-      else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
+      else if (png_handle_as_unknown(png_ptr, chunk_name))
       {
-         if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+         if (!png_memcmp(chunk_name, png_IDAT, 4))
          {
-            if (length > 0 || png_ptr->mode & PNG_AFTER_IDAT)
+            if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
                png_error(png_ptr, "Too many IDAT's found");
          }
-         else
-            png_ptr->mode |= PNG_AFTER_IDAT;
          png_handle_unknown(png_ptr, info_ptr, length);
-         if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+         if (!png_memcmp(chunk_name, png_PLTE, 4))
             png_ptr->mode |= PNG_HAVE_PLTE;
       }
 #endif
-      else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+      else if (!png_memcmp(chunk_name, png_IDAT, 4))
       {
          /* Zero length IDATs are legal after the last IDAT has been
           * read, but not after other chunks have been read.
           */
-         if (length > 0 || png_ptr->mode & PNG_AFTER_IDAT)
+         if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
             png_error(png_ptr, "Too many IDAT's found");
          png_crc_finish(png_ptr, length);
       }
-      else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+      else if (!png_memcmp(chunk_name, png_PLTE, 4))
          png_handle_PLTE(png_ptr, info_ptr, length);
 #if defined(PNG_READ_bKGD_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
+      else if (!png_memcmp(chunk_name, png_bKGD, 4))
          png_handle_bKGD(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_cHRM_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
+      else if (!png_memcmp(chunk_name, png_cHRM, 4))
          png_handle_cHRM(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_gAMA_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
+      else if (!png_memcmp(chunk_name, png_gAMA, 4))
          png_handle_gAMA(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_hIST_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
+      else if (!png_memcmp(chunk_name, png_hIST, 4))
          png_handle_hIST(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_oFFs_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
+      else if (!png_memcmp(chunk_name, png_oFFs, 4))
          png_handle_oFFs(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_pCAL_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
+      else if (!png_memcmp(chunk_name, png_pCAL, 4))
          png_handle_pCAL(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sCAL_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
+      else if (!png_memcmp(chunk_name, png_sCAL, 4))
          png_handle_sCAL(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_pHYs_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
+      else if (!png_memcmp(chunk_name, png_pHYs, 4))
          png_handle_pHYs(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sBIT_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
+      else if (!png_memcmp(chunk_name, png_sBIT, 4))
          png_handle_sBIT(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sRGB_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
+      else if (!png_memcmp(chunk_name, png_sRGB, 4))
          png_handle_sRGB(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_iCCP_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
+      else if (!png_memcmp(chunk_name, png_iCCP, 4))
          png_handle_iCCP(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sPLT_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
+      else if (!png_memcmp(chunk_name, png_sPLT, 4))
          png_handle_sPLT(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tEXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
+      else if (!png_memcmp(chunk_name, png_tEXt, 4))
          png_handle_tEXt(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tIME_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
+      else if (!png_memcmp(chunk_name, png_tIME, 4))
          png_handle_tIME(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tRNS_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
+      else if (!png_memcmp(chunk_name, png_tRNS, 4))
          png_handle_tRNS(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_zTXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
+      else if (!png_memcmp(chunk_name, png_zTXt, 4))
          png_handle_zTXt(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_iTXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
+      else if (!png_memcmp(chunk_name, png_iTXt, 4))
          png_handle_iTXt(png_ptr, info_ptr, length);
 #endif
       else
@@ -1086,13 +1083,20 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp 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;
-   png_voidp mem_ptr;
+   png_free_ptr free_fn = NULL;
+   png_voidp mem_ptr = NULL;
 #endif
 
-   png_debug(1, "in png_destroy_read_struct\n");
+   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;
@@ -1100,11 +1104,6 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
    if (end_info_ptr_ptr != NULL)
       end_info_ptr = *end_info_ptr_ptr;
 
-#ifdef PNG_USER_MEM_SUPPORTED
-   free_fn = png_ptr->free_fn;
-   mem_ptr = png_ptr->mem_ptr;
-#endif
-
    png_read_destroy(png_ptr, info_ptr, end_info_ptr);
 
    if (info_ptr != NULL)
@@ -1162,7 +1161,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
    png_free_ptr free_fn;
 #endif
 
-   png_debug(1, "in png_read_destroy\n");
+   png_debug(1, "in png_read_destroy");
    if (info_ptr != NULL)
       png_info_destroy(png_ptr, info_ptr);
 
@@ -1172,6 +1171,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
    png_free(png_ptr, png_ptr->zbuf);
    png_free(png_ptr, png_ptr->big_row_buf);
    png_free(png_ptr, png_ptr->prev_row);
+   png_free(png_ptr, png_ptr->chunkdata);
 #if defined(PNG_READ_DITHER_SUPPORTED)
    png_free(png_ptr, png_ptr->palette_lookup);
    png_free(png_ptr, png_ptr->dither_index);
@@ -1268,7 +1268,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
     * being used again.
     */
 #ifdef PNG_SETJMP_SUPPORTED
-   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
+   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
 #endif
 
    error_fn = png_ptr->error_fn;
@@ -1278,7 +1278,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
    free_fn = png_ptr->free_fn;
 #endif
 
-   png_memset(png_ptr, 0, png_sizeof (png_struct));
+   png_memset(png_ptr, 0, png_sizeof(png_struct));
 
    png_ptr->error_fn = error_fn;
    png_ptr->warning_fn = warning_fn;
@@ -1288,7 +1288,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
-   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
 #endif
 
 }
@@ -1296,6 +1296,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
 void PNGAPI
 png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
 {
+   if (png_ptr == NULL) return;
    png_ptr->read_row_fn = read_row_fn;
 }
 
@@ -1309,6 +1310,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
 {
    int row;
 
+   if (png_ptr == NULL) return;
 #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED)
    /* invert the alpha channel from opacity to transparency
     */
@@ -1321,7 +1323,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
     */
    png_read_info(png_ptr, info_ptr);
    if (info_ptr->height > PNG_UINT_32_MAX/png_sizeof(png_bytep))
-      png_error(png_ptr,"Image is too high to process with png_read_png()");
+      png_error(png_ptr, "Image is too high to process with png_read_png()");
 
    /* -------------- image transformations start here ------------------- */
 
@@ -1428,18 +1430,18 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
 #ifdef PNG_FREE_ME_SUPPORTED
    png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
 #endif
-   if(info_ptr->row_pointers == NULL)
+   if (info_ptr->row_pointers == NULL)
    {
       info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
          info_ptr->height * png_sizeof(png_bytep));
 #ifdef PNG_FREE_ME_SUPPORTED
       info_ptr->free_me |= PNG_FREE_ROWS;
 #endif
+      png_memset(info_ptr->row_pointers, 0, info_ptr->height
+         * png_sizeof(png_bytep));
       for (row = 0; row < (int)info_ptr->height; row++)
-      {
          info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr,
             png_get_rowbytes(png_ptr, info_ptr));
-      }
    }
 
    png_read_image(png_ptr, info_ptr->row_pointers);
@@ -1448,9 +1450,10 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
    /* read rest of file, and get additional chunks in info_ptr - REQUIRED */
    png_read_end(png_ptr, info_ptr);
 
-   if(transforms == 0 || params == NULL)
-      /* quiet compiler warnings */ return;
+   transforms = transforms; /* quiet compiler warnings */
+   params = params;
 
 }
-#endif
+#endif /* PNG_INFO_IMAGE_SUPPORTED */
 #endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED */

pngrio.c

@@ -1,9 +1,9 @@
 
 /* pngrio.c - functions for data input
  *
- * libpng 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.30 [August 15, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  *
@@ -17,6 +17,7 @@
 
 #define PNG_INTERNAL
 #include "png.h"
+#if defined(PNG_READ_SUPPORTED)
 
 /* Read the data from whatever input you are using.  The default routine
    reads from a file pointer.  Note that this routine sometimes gets called
@@ -26,7 +27,7 @@
 void /* PRIVATE */
 png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
-   png_debug1(4,"reading %d bytes\n", (int)length);
+   png_debug1(4, "reading %d bytes", (int)length);
    if (png_ptr->read_data_fn != NULL)
       (*(png_ptr->read_data_fn))(png_ptr, data, length);
    else
@@ -44,6 +45,7 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    png_size_t check;
 
+   if (png_ptr == NULL) return;
    /* 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.
     */
@@ -67,13 +69,14 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 #define NEAR_BUF_SIZE 1024
 #define MIN(a,b) (a <= b ? a : b)
 
-static void /* PRIVATE */
+static void PNGAPI
 png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    int 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);
@@ -102,7 +105,7 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
          err = fread(buf, (png_size_t)1, read, io_ptr);
 #endif
          png_memcpy(data, buf, read); /* copy far buffer to near buffer */
-         if(err != read)
+         if (err != read)
             break;
          else
             check += err;
@@ -134,6 +137,7 @@ void PNGAPI
 png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
    png_rw_ptr read_data_fn)
 {
+   if (png_ptr == NULL) return;
    png_ptr->io_ptr = io_ptr;
 
 #if !defined(PNG_NO_STDIO)
@@ -159,3 +163,4 @@ png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
    png_ptr->output_flush_fn = NULL;
 #endif
 }
+#endif /* PNG_READ_SUPPORTED */

pngtest.c

@@ -1,9 +1,9 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * libpng 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.32 [September 18, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  *
@@ -37,18 +37,17 @@
 #  include <windows.h>
 #  include <stdlib.h>
 #  define READFILE(file, data, length, check) \
-     if (ReadFile(file, data, length, &check,NULL)) check = 0
+     if (ReadFile(file, data, length, &check, NULL)) check = 0
 #  define WRITEFILE(file, data, length, check)) \
      if (WriteFile(file, data, length, &check, NULL)) check = 0
 #  define FCLOSE(file) CloseHandle(file)
 #else
 #  include <stdio.h>
 #  include <stdlib.h>
-#  include <assert.h>
 #  define READFILE(file, data, length, check) \
-     check=(png_size_t)fread(data,(png_size_t)1,length,file)
+     check=(png_size_t)fread(data, (png_size_t)1, length, file)
 #  define WRITEFILE(file, data, length, check) \
-     check=(png_size_t)fwrite(data,(png_size_t)1, length, file)
+     check=(png_size_t)fwrite(data, (png_size_t)1, length, file)
 #  define FCLOSE(file) fclose(file)
 #endif
 
@@ -82,21 +81,10 @@ static float t_start, t_stop, t_decode, t_encode, t_misc;
 #include <time.h>
 #endif
 
-/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
-#ifndef png_jmpbuf
-#  define png_jmpbuf(png_ptr) png_ptr->jmpbuf
-#endif
-
-#ifdef PNGTEST_TIMING
-static float t_start, t_stop, t_decode, t_encode, t_misc;
-#if !defined(PNG_tIME_SUPPORTED)
-#include <time.h>
-#endif
-#endif
-
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
-static int tIME_chunk_present=0;
-static char tIME_string[30] = "no tIME chunk present in file";
+#define PNG_tIME_STRING_LENGTH 29
+static int tIME_chunk_present = 0;
+static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
 #endif
 
 static int verbose = 0;
@@ -111,10 +99,20 @@ int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
 /*  #define STDERR stderr  */
 #define STDERR stdout   /* for DOS */
 
+/* In case a system header (e.g., on AIX) defined jmpbuf */
+#ifdef jmpbuf
+#  undef jmpbuf
+#endif
+
+/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
+#ifndef png_jmpbuf
+#  define png_jmpbuf(png_ptr) png_ptr->jmpbuf
+#endif
+
 /* example of using row callbacks to make a simple progress meter */
-static int status_pass=1;
-static int status_dots_requested=0;
-static int status_dots=1;
+static int status_pass = 1;
+static int status_dots_requested = 0;
+static int status_dots = 1;
 
 void
 #ifdef PNG_1_0_X
@@ -127,15 +125,15 @@ PNGAPI
 #endif
 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;
-    if(status_pass != pass)
+    if (png_ptr == NULL || row_number > PNG_UINT_31_MAX) return;
+    if (status_pass != pass)
     {
-       fprintf(stdout,"\n Pass %d: ",pass);
+       fprintf(stdout, "\n Pass %d: ", pass);
        status_pass = pass;
        status_dots = 31;
     }
     status_dots--;
-    if(status_dots == 0)
+    if (status_dots == 0)
     {
        fprintf(stdout, "\n         ");
        status_dots=30;
@@ -154,7 +152,7 @@ PNGAPI
 #endif
 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;
+    if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7) return;
     fprintf(stdout, "w");
 }
 
@@ -175,8 +173,8 @@ PNGAPI
 #endif
 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)];
+    if (png_ptr != NULL && row_info != NULL)
+      ++filters_used[*(data - 1)];
 }
 #endif
 
@@ -198,7 +196,7 @@ PNGAPI
 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 {
    png_bytep dp = data;
-   if(png_ptr == NULL)return;
+   if (png_ptr == NULL)return;
 
    /* contents of row_info:
     *  png_uint_32 width      width of row
@@ -212,44 +210,44 @@ count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 
     /* counts the number of zero samples (or zero pixels if color_type is 3 */
 
-    if(row_info->color_type == 0 || row_info->color_type == 3)
+    if (row_info->color_type == 0 || row_info->color_type == 3)
     {
-       int pos=0;
+       int pos = 0;
        png_uint_32 n, nstop;
-       for (n=0, nstop=row_info->width; n<nstop; n++)
+       for (n = 0, nstop=row_info->width; n<nstop; n++)
        {
-          if(row_info->bit_depth == 1)
+          if (row_info->bit_depth == 1)
           {
-             if(((*dp << pos++ ) & 0x80) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << pos++ ) & 0x80) == 0) zero_samples++;
+             if (pos == 8)
              {
                 pos = 0;
                 dp++;
              }
           }
-          if(row_info->bit_depth == 2)
+          if (row_info->bit_depth == 2)
           {
-             if(((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++;
+             if (pos == 8)
              {
                 pos = 0;
                 dp++;
              }
           }
-          if(row_info->bit_depth == 4)
+          if (row_info->bit_depth == 4)
           {
-             if(((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++;
+             if (pos == 8)
              {
                 pos = 0;
                 dp++;
              }
           }
-          if(row_info->bit_depth == 8)
-             if(*dp++ == 0) zero_samples++;
-          if(row_info->bit_depth == 16)
+          if (row_info->bit_depth == 8)
+             if (*dp++ == 0) zero_samples++;
+          if (row_info->bit_depth == 16)
           {
-             if((*dp | *(dp+1)) == 0) zero_samples++;
+             if ((*dp | *(dp+1)) == 0) zero_samples++;
              dp+=2;
           }
        }
@@ -259,24 +257,24 @@ count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
        png_uint_32 n, nstop;
        int channel;
        int color_channels = row_info->channels;
-       if(row_info->color_type > 3)color_channels--;
+       if (row_info->color_type > 3)color_channels--;
 
-       for (n=0, nstop=row_info->width; n<nstop; n++)
+       for (n = 0, nstop=row_info->width; n<nstop; n++)
        {
           for (channel = 0; channel < color_channels; channel++)
           {
-             if(row_info->bit_depth == 8)
-                if(*dp++ == 0) zero_samples++;
-             if(row_info->bit_depth == 16)
+             if (row_info->bit_depth == 8)
+                if (*dp++ == 0) zero_samples++;
+             if (row_info->bit_depth == 16)
              {
-                if((*dp | *(dp+1)) == 0) zero_samples++;
+                if ((*dp | *(dp+1)) == 0) zero_samples++;
                 dp+=2;
              }
           }
-          if(row_info->color_type > 3)
+          if (row_info->color_type > 3)
           {
              dp++;
-             if(row_info->bit_depth == 16)dp++;
+             if (row_info->bit_depth == 16)dp++;
           }
        }
     }
@@ -344,7 +342,7 @@ pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
          read = MIN(NEAR_BUF_SIZE, remaining);
          READFILE(io_ptr, buf, 1, err);
          png_memcpy(data, buf, read); /* copy far buffer to near buffer */
-         if(err != read)
+         if (err != read)
             break;
          else
             check += err;
@@ -437,7 +435,6 @@ pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
       png_error(png_ptr, "Write Error");
    }
 }
-
 #endif /* USE_FAR_KEYWORD */
 
 /* This function is called when there is a warning, but the library thinks
@@ -514,7 +511,7 @@ png_debug_malloc(png_structp png_ptr, png_uint_32 size)
       memory_infop pinfo;
       png_set_mem_fn(png_ptr, NULL, NULL, NULL);
       pinfo = (memory_infop)png_malloc(png_ptr,
-         (png_uint_32)png_sizeof (*pinfo));
+         (png_uint_32)png_sizeof(*pinfo));
       pinfo->size = size;
       current_allocation += size;
       total_allocation += size;
@@ -523,8 +520,9 @@ png_debug_malloc(png_structp png_ptr, png_uint_32 size)
          maximum_allocation = current_allocation;
       pinfo->pointer = (png_voidp)png_malloc(png_ptr, size);
       /* Restore malloc_fn and free_fn */
-      png_set_mem_fn(png_ptr, png_voidp_NULL, (png_malloc_ptr)png_debug_malloc,
-         (png_free_ptr)png_debug_free);
+      png_set_mem_fn(png_ptr,
+          png_voidp_NULL, (png_malloc_ptr)png_debug_malloc,
+          (png_free_ptr)png_debug_free);
       if (size != 0 && pinfo->pointer == NULL)
       {
          current_allocation -= size;
@@ -536,9 +534,9 @@ png_debug_malloc(png_structp png_ptr, png_uint_32 size)
       pinformation = pinfo;
       /* Make sure the caller isn't assuming zeroed memory. */
       png_memset(pinfo->pointer, 0xdd, pinfo->size);
-      if(verbose)
-         printf("png_malloc %lu bytes at %x\n",size,pinfo->pointer);
-      assert(pinfo->size != 12345678);
+      if (verbose)
+         printf("png_malloc %lu bytes at %x\n", (unsigned long)size,
+            pinfo->pointer);
       return (png_voidp)(pinfo->pointer);
    }
 }
@@ -573,7 +571,7 @@ png_debug_free(png_structp png_ptr, png_voidp ptr)
                the memory that is to be freed. */
             png_memset(ptr, 0x55, pinfo->size);
             png_free_default(png_ptr, pinfo);
-            pinfo=NULL;
+            pinfo = NULL;
             break;
          }
          if (pinfo->next == NULL)
@@ -586,14 +584,81 @@ png_debug_free(png_structp png_ptr, png_voidp ptr)
    }
 
    /* Finally free the data. */
-   if(verbose)
-      printf("Freeing %x\n",ptr);
+   if (verbose)
+      printf("Freeing %x\n", ptr);
    png_free_default(png_ptr, ptr);
-   ptr=NULL;
+   ptr = NULL;
 }
 #endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
 /* END of code to test memory allocation/deallocation */
 
+
+/* Demonstration of user chunk support of the sTER and vpAg chunks */
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+
+/* (sTER is a public chunk not yet understood by libpng.  vpAg is a private
+chunk used in ImageMagick to store "virtual page" size).  */
+
+static png_uint_32 user_chunk_data[4];
+
+    /* 0: sTER mode + 1
+     * 1: vpAg width
+     * 2: vpAg height
+     * 3: vpAg units
+     */
+
+static int read_user_chunk_callback(png_struct *png_ptr,
+   png_unknown_chunkp chunk)
+{
+  png_uint_32
+    *user_chunk_data;
+
+  /* Return one of the following: */
+     /* return (-n);  chunk had an error */
+     /* return (0);  did not recognize */
+     /* return (n);  success */
+
+  /* The unknown chunk structure contains the chunk data:
+   * png_byte name[5];
+   * png_byte *data;
+   * png_size_t size;
+   *
+   *  Note that libpng has already taken care of the CRC handling.
+   */
+
+  if (chunk->name[0] == 115 && chunk->name[1] ==  84 &&     /* s  T */
+      chunk->name[2] ==  69 && chunk->name[3] ==  82)       /* E  R */
+     {
+       /* Found sTER chunk */
+       if (chunk->size != 1)
+         return (-1); /* Error return */
+       if (chunk->data[0] != 0 && chunk->data[0] != 1)
+          return (-1);  /* Invalid mode */
+       user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
+       user_chunk_data[0]=chunk->data[0]+1;
+       return (1);
+     }
+  if (chunk->name[0] != 118 || chunk->name[1] != 112 ||    /* v  p */
+      chunk->name[2] !=  65 || chunk->name[3] != 103)      /* A  g */
+    return (0); /* Did not recognize */
+
+  /* Found ImageMagick vpAg chunk */
+
+  if (chunk->size != 9)
+    return (-1); /* Error return */
+
+  user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
+
+  user_chunk_data[1]=png_get_uint_31(png_ptr, chunk->data);
+  user_chunk_data[2]=png_get_uint_31(png_ptr, chunk->data + 4);
+  user_chunk_data[3]=(png_uint_32)chunk->data[8];
+
+  return (1);
+
+}
+#endif
+/* END of code to demonstrate user chunk support */
+
 /* Test one file */
 int
 test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
@@ -652,26 +717,40 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       return (1);
    }
 
-   png_debug(0, "Allocating read and write structures\n");
+   png_debug(0, "Allocating read and write structures");
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
-   read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+   read_ptr =
+      png_create_read_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
       png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
       (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
 #else
-   read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+   read_ptr =
+      png_create_read_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
       png_error_ptr_NULL, png_error_ptr_NULL);
 #endif
 #if defined(PNG_NO_STDIO)
    png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
        pngtest_warning);
 #endif
+
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+  user_chunk_data[0] = 0;
+  user_chunk_data[1] = 0;
+  user_chunk_data[2] = 0;
+  user_chunk_data[3] = 0;
+  png_set_read_user_chunk_fn(read_ptr, user_chunk_data,
+    read_user_chunk_callback);
+
+#endif
 #ifdef PNG_WRITE_SUPPORTED
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
-   write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+   write_ptr =
+      png_create_write_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
       png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
       (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
 #else
-   write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+   write_ptr =
+      png_create_write_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
       png_error_ptr_NULL, png_error_ptr_NULL);
 #endif
 #if defined(PNG_NO_STDIO)
@@ -679,7 +758,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
        pngtest_warning);
 #endif
 #endif
-   png_debug(0, "Allocating read_info, write_info and end_info structures\n");
+   png_debug(0, "Allocating read_info, write_info and end_info structures");
    read_info_ptr = png_create_info_struct(read_ptr);
    end_info_ptr = png_create_info_struct(read_ptr);
 #ifdef PNG_WRITE_SUPPORTED
@@ -688,7 +767,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
-   png_debug(0, "Setting jmpbuf for read struct\n");
+   png_debug(0, "Setting jmpbuf for read struct");
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
 #else
@@ -696,8 +775,8 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif
    {
       fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
-      if (row_buf)
-         png_free(read_ptr, row_buf);
+      png_free(read_ptr, row_buf);
+      row_buf = NULL;
       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
 #ifdef PNG_WRITE_SUPPORTED
       png_destroy_info_struct(write_ptr, &write_end_info_ptr);
@@ -708,11 +787,11 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       return (1);
    }
 #ifdef USE_FAR_KEYWORD
-   png_memcpy(png_jmpbuf(read_ptr),jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_jmpbuf(read_ptr), jmpbuf, png_sizeof(jmp_buf));
 #endif
 
 #ifdef PNG_WRITE_SUPPORTED
-   png_debug(0, "Setting jmpbuf for write struct\n");
+   png_debug(0, "Setting jmpbuf for write struct");
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
 #else
@@ -730,12 +809,12 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       return (1);
    }
 #ifdef USE_FAR_KEYWORD
-   png_memcpy(png_jmpbuf(write_ptr),jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_jmpbuf(write_ptr), jmpbuf, png_sizeof(jmp_buf));
 #endif
 #endif
 #endif
 
-   png_debug(0, "Initializing input and output streams\n");
+   png_debug(0, "Initializing input and output streams");
 #if !defined(PNG_NO_STDIO)
    png_init_io(read_ptr, fpin);
 #  ifdef PNG_WRITE_SUPPORTED
@@ -752,7 +831,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #    endif
 #  endif
 #endif
-   if(status_dots_requested == 1)
+   if (status_dots_requested == 1)
    {
 #ifdef PNG_WRITE_SUPPORTED
       png_set_write_status_fn(write_ptr, write_row_callback);
@@ -770,13 +849,13 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
    {
      int i;
-     for(i=0; i<256; i++)
-        filters_used[i]=0;
+     for (i = 0; i<256; i++)
+        filters_used[i] = 0;
      png_set_read_user_transform_fn(read_ptr, count_filters);
    }
 #endif
 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-   zero_samples=0;
+   zero_samples = 0;
    png_set_write_user_transform_fn(write_ptr, count_zero_samples);
 #endif
 
@@ -795,10 +874,10 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       png_bytep_NULL, 0);
 #endif
 
-   png_debug(0, "Reading info struct\n");
+   png_debug(0, "Reading info struct");
    png_read_info(read_ptr, read_info_ptr);
 
-   png_debug(0, "Transferring info struct\n");
+   png_debug(0, "Transferring info struct");
    {
       int interlace_type, compression_type, filter_type;
 
@@ -921,7 +1000,8 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       png_int_32 offset_x, offset_y;
       int unit_type;
 
-      if (png_get_oFFs(read_ptr, read_info_ptr,&offset_x,&offset_y,&unit_type))
+      if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
+         &unit_type))
       {
          png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
       }
@@ -997,7 +1077,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 
       if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
       {
-         png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text);
+         png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks", num_text);
          png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
       }
    }
@@ -1010,10 +1090,13 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       {
          png_set_tIME(write_ptr, write_info_ptr, mod_time);
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
-         /* we have to use png_strcpy instead of "=" because the string
+         /* we have to use png_memcpy instead of "=" because the string
             pointed to by png_convert_to_rfc1123() gets free'ed before
             we use it */
-         png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time));
+         png_memcpy(tIME_string,
+                    png_convert_to_rfc1123(read_ptr, mod_time),
+                    png_sizeof(tIME_string));
+         tIME_string[png_sizeof(tIME_string) - 1] = '\0';
          tIME_chunk_present++;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
       }
@@ -1028,8 +1111,16 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       if (png_get_tRNS(read_ptr, read_info_ptr, &trans, &num_trans,
          &trans_values))
       {
-         png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans,
-            trans_values);
+         int sample_max = (1 << read_info_ptr->bit_depth);
+         /* libpng doesn't reject a tRNS chunk with out-of-range samples */
+         if (!((read_info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
+            (int)trans_values->gray > sample_max) ||
+            (read_info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
+            ((int)trans_values->red > sample_max ||
+            (int)trans_values->green > sample_max ||
+            (int)trans_values->blue > sample_max))))
+           png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans,
+              trans_values);
       }
    }
 #endif
@@ -1054,21 +1145,55 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif
 
 #ifdef PNG_WRITE_SUPPORTED
-   png_debug(0, "\nWriting info struct\n");
+   png_debug(0, "Writing info struct");
 
 /* If we wanted, we could write info in two steps:
    png_write_info_before_PLTE(write_ptr, write_info_ptr);
  */
    png_write_info(write_ptr, write_info_ptr);
+
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+   if (user_chunk_data[0] != 0)
+   {
+     png_byte png_sTER[5] = {115,  84,  69,  82, '\0'};
+
+     unsigned char
+       ster_chunk_data[1];
+
+     if (verbose)
+        fprintf(STDERR, "stereo mode = %lu\n",
+          (unsigned long)(user_chunk_data[0] - 1));
+     ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1);
+     png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1);
+   }
+   if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0)
+   {
+     png_byte png_vpAg[5] = {118, 112,  65, 103, '\0'};
+
+     unsigned char
+       vpag_chunk_data[9];
+
+     if (verbose)
+        fprintf(STDERR, "vpAg = %lu x %lu, units=%lu\n",
+          (unsigned long)user_chunk_data[1],
+          (unsigned long)user_chunk_data[2],
+          (unsigned long)user_chunk_data[3]);
+     png_save_uint_32(vpag_chunk_data, user_chunk_data[1]);
+     png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]);
+     vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff);
+     png_write_chunk(write_ptr, png_vpAg, vpag_chunk_data, 9);
+   }
+
+#endif
 #endif
 
 #ifdef SINGLE_ROWBUF_ALLOC
-   png_debug(0, "\nAllocating row buffer...");
+   png_debug(0, "Allocating row buffer...");
    row_buf = (png_bytep)png_malloc(read_ptr,
       png_get_rowbytes(read_ptr, read_info_ptr));
-   png_debug1(0, "0x%08lx\n\n", (unsigned long)row_buf);
+   png_debug1(0, "0x%08lx", (unsigned long)row_buf);
 #endif /* SINGLE_ROWBUF_ALLOC */
-   png_debug(0, "Writing row data\n");
+   png_debug(0, "Writing row data");
 
 #if defined(PNG_READ_INTERLACING_SUPPORTED) || \
   defined(PNG_WRITE_INTERLACING_SUPPORTED)
@@ -1077,7 +1202,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
    png_set_interlace_handling(write_ptr);
 #  endif
 #else
-   num_pass=1;
+   num_pass = 1;
 #endif
 
 #ifdef PNGTEST_TIMING
@@ -1087,14 +1212,14 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif
    for (pass = 0; pass < num_pass; pass++)
    {
-      png_debug1(0, "Writing row data for pass %d\n",pass);
+      png_debug1(0, "Writing row data for pass %d", pass);
       for (y = 0; y < height; y++)
       {
 #ifndef SINGLE_ROWBUF_ALLOC
-         png_debug2(0, "\nAllocating row buffer (pass %d, y = %ld)...", pass,y);
+         png_debug2(0, "Allocating row buffer (pass %d, y = %ld)...", pass, y);
          row_buf = (png_bytep)png_malloc(read_ptr,
             png_get_rowbytes(read_ptr, read_info_ptr));
-         png_debug2(0, "0x%08lx (%ld bytes)\n", (unsigned long)row_buf,
+         png_debug2(0, "0x%08lx (%ld bytes)", (unsigned long)row_buf,
             png_get_rowbytes(read_ptr, read_info_ptr));
 #endif /* !SINGLE_ROWBUF_ALLOC */
          png_read_rows(read_ptr, (png_bytepp)&row_buf, png_bytepp_NULL, 1);
@@ -1114,8 +1239,9 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif /* PNG_WRITE_SUPPORTED */
 
 #ifndef SINGLE_ROWBUF_ALLOC
-         png_debug2(0, "Freeing row buffer (pass %d, y = %ld)\n\n", pass, y);
+         png_debug2(0, "Freeing row buffer (pass %d, y = %ld)", pass, y);
          png_free(read_ptr, row_buf);
+         row_buf = NULL;
 #endif /* !SINGLE_ROWBUF_ALLOC */
       }
    }
@@ -1127,7 +1253,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
    png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
 #endif
 
-   png_debug(0, "Reading and writing end_info data\n");
+   png_debug(0, "Reading and writing end_info data");
 
    png_read_end(read_ptr, end_info_ptr);
 #if defined(PNG_TEXT_SUPPORTED)
@@ -1137,7 +1263,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 
       if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
       {
-         png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text);
+         png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks", num_text);
          png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
       }
    }
@@ -1150,10 +1276,13 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       {
          png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
-         /* we have to use png_strcpy instead of "=" because the string
+         /* we have to use png_memcpy instead of "=" because the string
             pointed to by png_convert_to_rfc1123() gets free'ed before
             we use it */
-         png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time));
+         png_memcpy(tIME_string,
+                    png_convert_to_rfc1123(read_ptr, mod_time),
+                    png_sizeof(tIME_string));
+         tIME_string[png_sizeof(tIME_string) - 1] = '\0';
          tIME_chunk_present++;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
       }
@@ -1184,36 +1313,36 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif
 
 #ifdef PNG_EASY_ACCESS_SUPPORTED
-   if(verbose)
+   if (verbose)
    {
       png_uint_32 iwidth, iheight;
       iwidth = png_get_image_width(write_ptr, write_info_ptr);
       iheight = png_get_image_height(write_ptr, write_info_ptr);
       fprintf(STDERR, "Image width = %lu, height = %lu\n",
-         iwidth, iheight);
+         (unsigned long)iwidth, (unsigned long)iheight);
    }
 #endif
 
-   png_debug(0, "Destroying data structs\n");
+   png_debug(0, "Destroying data structs");
 #ifdef SINGLE_ROWBUF_ALLOC
-   png_debug(1, "destroying row_buf for read_ptr\n");
+   png_debug(1, "destroying row_buf for read_ptr");
    png_free(read_ptr, row_buf);
-   row_buf=NULL;
+   row_buf = NULL;
 #endif /* SINGLE_ROWBUF_ALLOC */
-   png_debug(1, "destroying read_ptr, read_info_ptr, end_info_ptr\n");
+   png_debug(1, "destroying read_ptr, read_info_ptr, end_info_ptr");
    png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
 #ifdef PNG_WRITE_SUPPORTED
-   png_debug(1, "destroying write_end_info_ptr\n");
+   png_debug(1, "destroying write_end_info_ptr");
    png_destroy_info_struct(write_ptr, &write_end_info_ptr);
-   png_debug(1, "destroying write_ptr, write_info_ptr\n");
+   png_debug(1, "destroying write_ptr, write_info_ptr");
    png_destroy_write_struct(&write_ptr, &write_info_ptr);
 #endif
-   png_debug(0, "Destruction complete.\n");
+   png_debug(0, "Destruction complete.");
 
    FCLOSE(fpin);
    FCLOSE(fpout);
 
-   png_debug(0, "Opening files for comparison\n");
+   png_debug(0, "Opening files for comparison");
 #if defined(_WIN32_WCE)
    MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH);
    if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
@@ -1237,28 +1366,28 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       return (1);
    }
 
-   for(;;)
+   for (;;)
    {
       png_size_t num_in, num_out;
 
-      READFILE(fpin, inbuf, 1, num_in);
-      READFILE(fpout, outbuf, 1, num_out);
+         READFILE(fpin, inbuf, 1, num_in);
+         READFILE(fpout, outbuf, 1, num_out);
 
       if (num_in != num_out)
       {
          fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
                  inname, outname);
-         if(wrote_question == 0)
+         if (wrote_question == 0)
          {
             fprintf(STDERR,
          "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
-              inname,PNG_ZBUF_SIZE);
+              inname, PNG_ZBUF_SIZE);
             fprintf(STDERR,
               "\n   filtering heuristic (libpng default), compression");
             fprintf(STDERR,
               " level (zlib default),\n   and zlib version (%s)?\n\n",
               ZLIB_VERSION);
-            wrote_question=1;
+            wrote_question = 1;
          }
          FCLOSE(fpin);
          FCLOSE(fpout);
@@ -1271,17 +1400,17 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       if (png_memcmp(inbuf, outbuf, num_in))
       {
          fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
-         if(wrote_question == 0)
+         if (wrote_question == 0)
          {
             fprintf(STDERR,
          "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
-                 inname,PNG_ZBUF_SIZE);
+                 inname, PNG_ZBUF_SIZE);
             fprintf(STDERR,
               "\n   filtering heuristic (libpng default), compression");
             fprintf(STDERR,
               " level (zlib default),\n   and zlib version (%s)?\n\n",
               ZLIB_VERSION);
-            wrote_question=1;
+            wrote_question = 1;
          }
          FCLOSE(fpin);
          FCLOSE(fpout);
@@ -1312,14 +1441,15 @@ main(int argc, char *argv[])
 
    fprintf(STDERR, "Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
    fprintf(STDERR, "   with zlib   version %s\n", ZLIB_VERSION);
-   fprintf(STDERR,"%s",png_get_copyright(NULL));
+   fprintf(STDERR, "%s", png_get_copyright(NULL));
    /* Show the version of libpng used in building the library */
-   fprintf(STDERR," library (%lu):%s", png_access_version_number(),
+   fprintf(STDERR, " library (%lu):%s",
+      (unsigned long)png_access_version_number(),
       png_get_header_version(NULL));
    /* Show the version of libpng used in building the application */
-   fprintf(STDERR," pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
+   fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
       PNG_HEADER_VERSION_STRING);
-   fprintf(STDERR," png_sizeof(png_struct)=%ld, png_sizeof(png_info)=%ld\n",
+   fprintf(STDERR, " sizeof(png_struct)=%ld, sizeof(png_info)=%ld\n",
                     (long)png_sizeof(png_struct), (long)png_sizeof(png_info));
 
    /* Do some consistency checking on the memory allocation settings, I'm
@@ -1370,10 +1500,10 @@ main(int argc, char *argv[])
       }
    }
 
-   if (!multiple && argc == 3+verbose)
-     outname = argv[2+verbose];
+   if (!multiple && argc == 3 + verbose)
+     outname = argv[2 + verbose];
 
-   if ((!multiple && argc > 3+verbose) || (multiple && argc < 2))
+   if ((!multiple && argc > 3 + verbose) || (multiple && argc < 2))
    {
      fprintf(STDERR,
        "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
@@ -1397,24 +1527,25 @@ main(int argc, char *argv[])
          int k;
 #endif
          int kerror;
-         fprintf(STDERR, "Testing %s:",argv[i]);
+         fprintf(STDERR, "Testing %s:", argv[i]);
          kerror = test_one_file(argv[i], outname);
          if (kerror == 0)
          {
 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-            fprintf(STDERR, "\n PASS (%lu zero samples)\n",zero_samples);
+            fprintf(STDERR, "\n PASS (%lu zero samples)\n",
+               (unsigned long)zero_samples);
 #else
             fprintf(STDERR, " PASS\n");
 #endif
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
-            for (k=0; k<256; k++)
-               if(filters_used[k])
+            for (k = 0; k<256; k++)
+               if (filters_used[k])
                   fprintf(STDERR, " Filter %d was used %lu times\n",
-                     k,filters_used[k]);
+                     k, (unsigned long)filters_used[k]);
 #endif
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
-         if(tIME_chunk_present != 0)
-            fprintf(STDERR, " tIME = %s\n",tIME_string);
+         if (tIME_chunk_present != 0)
+            fprintf(STDERR, " tIME = %s\n", tIME_string);
          tIME_chunk_present = 0;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
          }
@@ -1426,7 +1557,7 @@ main(int argc, char *argv[])
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
          if (allocation_now != current_allocation)
             fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
-               current_allocation-allocation_now);
+               current_allocation - allocation_now);
          if (current_allocation != 0)
          {
             memory_infop pinfo = pinformation;
@@ -1435,7 +1566,8 @@ main(int argc, char *argv[])
                current_allocation);
             while (pinfo != NULL)
             {
-               fprintf(STDERR, " %lu bytes at %x\n", pinfo->size, 
+               fprintf(STDERR, " %lu bytes at %x\n",
+                 (unsigned long)pinfo->size,
                  (unsigned int) pinfo->pointer);
                pinfo = pinfo->next;
             }
@@ -1456,52 +1588,54 @@ main(int argc, char *argv[])
    else
    {
       int i;
-      for (i=0; i<3; ++i)
+      for (i = 0; i<3; ++i)
       {
          int kerror;
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
          int allocation_now = current_allocation;
 #endif
          if (i == 1) status_dots_requested = 1;
-         else if(verbose == 0)status_dots_requested = 0;
+         else if (verbose == 0)status_dots_requested = 0;
          if (i == 0 || verbose == 1 || ierror != 0)
-            fprintf(STDERR, "Testing %s:",inname);
+            fprintf(STDERR, "Testing %s:", inname);
          kerror = test_one_file(inname, outname);
-         if(kerror == 0)
+         if (kerror == 0)
          {
-            if(verbose == 1 || i == 2)
+            if (verbose == 1 || i == 2)
             {
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
                 int k;
 #endif
 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-                fprintf(STDERR, "\n PASS (%lu zero samples)\n",zero_samples);
+                fprintf(STDERR, "\n PASS (%lu zero samples)\n",
+                   (unsigned long)zero_samples);
 #else
                 fprintf(STDERR, " PASS\n");
 #endif
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
-                for (k=0; k<256; k++)
-                   if(filters_used[k])
+                for (k = 0; k<256; k++)
+                   if (filters_used[k])
                       fprintf(STDERR, " Filter %d was used %lu times\n",
-                         k,filters_used[k]);
+                         k,
+                         (unsigned long)filters_used[k]);
 #endif
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
-             if(tIME_chunk_present != 0)
-                fprintf(STDERR, " tIME = %s\n",tIME_string);
+             if (tIME_chunk_present != 0)
+                fprintf(STDERR, " tIME = %s\n", tIME_string);
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
             }
          }
          else
          {
-            if(verbose == 0 && i != 2)
-               fprintf(STDERR, "Testing %s:",inname);
+            if (verbose == 0 && i != 2)
+               fprintf(STDERR, "Testing %s:", inname);
             fprintf(STDERR, " FAIL\n");
             ierror += kerror;
          }
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
          if (allocation_now != current_allocation)
              fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
-               current_allocation-allocation_now);
+               current_allocation - allocation_now);
          if (current_allocation != 0)
          {
              memory_infop pinfo = pinformation;
@@ -1510,8 +1644,8 @@ main(int argc, char *argv[])
                 current_allocation);
              while (pinfo != NULL)
              {
-                fprintf(STDERR," %lu bytes at %x\n",
-                   pinfo->size, (unsigned int)pinfo->pointer);
+                fprintf(STDERR, " %lu bytes at %x\n",
+                   (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);
                 pinfo = pinfo->next;
              }
           }
@@ -1533,13 +1667,13 @@ main(int argc, char *argv[])
    t_stop = (float)clock();
    t_misc += (t_stop - t_start);
    t_start = t_stop;
-   fprintf(STDERR," CPU time used = %.3f seconds",
+   fprintf(STDERR, " CPU time used = %.3f seconds",
       (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
-   fprintf(STDERR," (decoding %.3f,\n",
+   fprintf(STDERR, " (decoding %.3f,\n",
       t_decode/(float)CLOCKS_PER_SEC);
-   fprintf(STDERR,"        encoding %.3f ,",
+   fprintf(STDERR, "        encoding %.3f ,",
       t_encode/(float)CLOCKS_PER_SEC);
-   fprintf(STDERR," other %.3f seconds)\n\n",
+   fprintf(STDERR, " other %.3f seconds)\n\n",
       t_misc/(float)CLOCKS_PER_SEC);
 #endif
 
@@ -1551,4 +1685,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_8 your_png_h_is_not_version_1_2_8;
+typedef version_1_0_43rc01 your_png_h_is_not_version_1_0_43rc01;

pngtrans.c

@@ -1,22 +1,24 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * libpng  1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.30 [August 15, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  */
 
 #define PNG_INTERNAL
 #include "png.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
 /* turn on BGR-to-RGB mapping */
 void PNGAPI
 png_set_bgr(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_bgr\n");
+   png_debug(1, "in png_set_bgr");
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_BGR;
 }
 #endif
@@ -26,7 +28,8 @@ png_set_bgr(png_structp png_ptr)
 void PNGAPI
 png_set_swap(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_swap\n");
+   png_debug(1, "in png_set_swap");
+   if (png_ptr == NULL) return;
    if (png_ptr->bit_depth == 16)
       png_ptr->transformations |= PNG_SWAP_BYTES;
 }
@@ -37,7 +40,8 @@ png_set_swap(png_structp png_ptr)
 void PNGAPI
 png_set_packing(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_packing\n");
+   png_debug(1, "in png_set_packing");
+   if (png_ptr == NULL) return;
    if (png_ptr->bit_depth < 8)
    {
       png_ptr->transformations |= PNG_PACK;
@@ -51,7 +55,8 @@ png_set_packing(png_structp png_ptr)
 void PNGAPI
 png_set_packswap(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_packswap\n");
+   png_debug(1, "in png_set_packswap");
+   if (png_ptr == NULL) return;
    if (png_ptr->bit_depth < 8)
       png_ptr->transformations |= PNG_PACKSWAP;
 }
@@ -61,7 +66,8 @@ png_set_packswap(png_structp png_ptr)
 void PNGAPI
 png_set_shift(png_structp png_ptr, png_color_8p true_bits)
 {
-   png_debug(1, "in png_set_shift\n");
+   png_debug(1, "in png_set_shift");
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_SHIFT;
    png_ptr->shift = *true_bits;
 }
@@ -72,8 +78,8 @@ png_set_shift(png_structp png_ptr, png_color_8p true_bits)
 int PNGAPI
 png_set_interlace_handling(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_interlace handling\n");
-   if (png_ptr->interlaced)
+   png_debug(1, "in png_set_interlace handling");
+   if (png_ptr && png_ptr->interlaced)
    {
       png_ptr->transformations |= PNG_INTERLACE;
       return (7);
@@ -92,7 +98,8 @@ png_set_interlace_handling(png_structp png_ptr)
 void PNGAPI
 png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 {
-   png_debug(1, "in png_set_filler\n");
+   png_debug(1, "in png_set_filler");
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_FILLER;
    png_ptr->filler = (png_byte)filler;
    if (filler_loc == PNG_FILLER_AFTER)
@@ -124,7 +131,8 @@ png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 void PNGAPI
 png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 {
-   png_debug(1, "in png_set_add_alpha\n");
+   png_debug(1, "in png_set_add_alpha");
+   if (png_ptr == NULL) return;
    png_set_filler(png_ptr, filler, filler_loc);
    png_ptr->transformations |= PNG_ADD_ALPHA;
 }
@@ -137,7 +145,8 @@ png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 void PNGAPI
 png_set_swap_alpha(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_swap_alpha\n");
+   png_debug(1, "in png_set_swap_alpha");
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_SWAP_ALPHA;
 }
 #endif
@@ -147,7 +156,8 @@ png_set_swap_alpha(png_structp png_ptr)
 void PNGAPI
 png_set_invert_alpha(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_invert_alpha\n");
+   png_debug(1, "in png_set_invert_alpha");
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_INVERT_ALPHA;
 }
 #endif
@@ -156,7 +166,8 @@ png_set_invert_alpha(png_structp png_ptr)
 void PNGAPI
 png_set_invert_mono(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_invert_mono\n");
+   png_debug(1, "in png_set_invert_mono");
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_INVERT_MONO;
 }
 
@@ -164,7 +175,7 @@ png_set_invert_mono(png_structp png_ptr)
 void /* PRIVATE */
 png_do_invert(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_invert\n");
+   png_debug(1, "in png_do_invert");
   /* This test removed from libpng version 1.0.13 and 1.2.0:
    *   if (row_info->bit_depth == 1 &&
    */
@@ -219,7 +230,7 @@ png_do_invert(png_row_infop row_info, png_bytep row)
 void /* PRIVATE */
 png_do_swap(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_swap\n");
+   png_debug(1, "in png_do_swap");
    if (
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
        row != NULL && row_info != NULL &&
@@ -241,7 +252,7 @@ png_do_swap(png_row_infop row_info, png_bytep row)
 #endif
 
 #if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-static png_byte onebppswaptable[256] = {
+static PNG_CONST png_byte onebppswaptable[256] = {
    0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
    0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
    0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
@@ -276,7 +287,7 @@ static png_byte onebppswaptable[256] = {
    0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
 };
 
-static png_byte twobppswaptable[256] = {
+static PNG_CONST png_byte twobppswaptable[256] = {
    0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,
    0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,
    0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,
@@ -311,7 +322,7 @@ static png_byte twobppswaptable[256] = {
    0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
 };
 
-static png_byte fourbppswaptable[256] = {
+static PNG_CONST png_byte fourbppswaptable[256] = {
    0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
    0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,
    0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,
@@ -350,7 +361,7 @@ static png_byte fourbppswaptable[256] = {
 void /* PRIVATE */
 png_do_packswap(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_packswap\n");
+   png_debug(1, "in png_do_packswap");
    if (
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
        row != NULL && row_info != NULL &&
@@ -362,11 +373,11 @@ png_do_packswap(png_row_infop row_info, png_bytep row)
       end = row + row_info->rowbytes;
 
       if (row_info->bit_depth == 1)
-         table = onebppswaptable;
+         table = (png_bytep)onebppswaptable;
       else if (row_info->bit_depth == 2)
-         table = twobppswaptable;
+         table = (png_bytep)twobppswaptable;
       else if (row_info->bit_depth == 4)
-         table = fourbppswaptable;
+         table = (png_bytep)fourbppswaptable;
       else
          return;
 
@@ -382,7 +393,7 @@ png_do_packswap(png_row_infop row_info, png_bytep row)
 void /* PRIVATE */
 png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
 {
-   png_debug(1, "in png_do_strip_filler\n");
+   png_debug(1, "in png_do_strip_filler");
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
    if (row != NULL && row_info != NULL)
 #endif
@@ -540,7 +551,7 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
 void /* PRIVATE */
 png_do_bgr(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_bgr\n");
+   png_debug(1, "in png_do_bgr");
    if (
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
        row != NULL && row_info != NULL &&
@@ -619,13 +630,14 @@ void PNGAPI
 png_set_user_transform_info(png_structp png_ptr, png_voidp
    user_transform_ptr, int user_transform_depth, int user_transform_channels)
 {
-   png_debug(1, "in png_set_user_transform_info\n");
+   png_debug(1, "in png_set_user_transform_info");
+   if (png_ptr == NULL) return;
 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
    png_ptr->user_transform_ptr = user_transform_ptr;
    png_ptr->user_transform_depth = (png_byte)user_transform_depth;
    png_ptr->user_transform_channels = (png_byte)user_transform_channels;
 #else
-   if(user_transform_ptr || user_transform_depth || user_transform_channels)
+   if (user_transform_ptr || user_transform_depth || user_transform_channels)
       png_warning(png_ptr,
         "This version of libpng does not support user transform info");
 #endif
@@ -640,11 +652,11 @@ png_set_user_transform_info(png_structp png_ptr, png_voidp
 png_voidp PNGAPI
 png_get_user_transform_ptr(png_structp png_ptr)
 {
+   if (png_ptr == NULL) return (NULL);
 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
    return ((png_voidp)png_ptr->user_transform_ptr);
 #else
-   if(png_ptr)
-     return (NULL);
    return (NULL);
 #endif
 }
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

pngwio.c

@@ -1,9 +1,9 @@
 
 /* pngwio.c - functions for data output
  *
- * libpng 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.35 [February 12, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2009 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.)
  *
@@ -45,6 +45,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    png_uint_32 check;
 
+   if (png_ptr == NULL) return;
 #if defined(_WIN32_WCE)
    if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
       check = 0;
@@ -70,6 +71,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
    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);
@@ -131,8 +133,11 @@ png_default_flush(png_structp png_ptr)
 {
 #if !defined(_WIN32_WCE)
    png_FILE_p io_ptr;
+#endif
+   if (png_ptr == NULL) return;
+#if !defined(_WIN32_WCE)
    io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
-   if (io_ptr != NULL)
+   if (io_ptr != NULL && fileno(io_ptr) != -1)
       fflush(io_ptr);
 #endif
 }
@@ -165,6 +170,7 @@ void PNGAPI
 png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
    png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
 {
+   if (png_ptr == NULL) return;
    png_ptr->io_ptr = io_ptr;
 
 #if !defined(PNG_NO_STDIO)
@@ -200,27 +206,27 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
 
 #if defined(USE_FAR_KEYWORD)
 #if defined(_MSC_VER)
-void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
+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");
+   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 *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");
+   if (check != 0)
+      if (far_ptr != ptr)
+         png_error(png_ptr, "segment lost in conversion");
    return(near_ptr);
 }
 #   endif

pngwrite.c

@@ -1,9 +1,9 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * libpng 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.34 [December 18, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  */
@@ -25,14 +25,16 @@
 void PNGAPI
 png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
 {
-   png_debug(1, "in png_write_info_before_PLTE\n");
+   png_debug(1, "in png_write_info_before_PLTE");
+   if (png_ptr == NULL || info_ptr == NULL)
+      return;
    if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
    {
    png_write_sig(png_ptr); /* write PNG signature */
 #if defined(PNG_MNG_FEATURES_SUPPORTED)
-   if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
+   if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
    {
-      png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
+      png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
       png_ptr->mng_features_permitted=0;
    }
 #endif
@@ -97,7 +99,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
    {
        png_unknown_chunk *up;
 
-       png_debug(5, "writing extra chunks\n");
+       png_debug(5, "writing extra chunks");
 
        for (up = info_ptr->unknown_chunks;
             up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
@@ -110,6 +112,8 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
             ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
             (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
          {
+            if (up->size == 0)
+               png_warning(png_ptr, "Writing zero-length unknown chunk");
             png_write_chunk(png_ptr, up->name, up->data, up->size);
          }
        }
@@ -126,7 +130,10 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
    int i;
 #endif
 
-   png_debug(1, "in png_write_info\n");
+   png_debug(1, "in png_write_info");
+
+   if (png_ptr == NULL || info_ptr == NULL)
+      return;
 
    png_write_info_before_PLTE(png_ptr, info_ptr);
 
@@ -134,7 +141,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
       png_write_PLTE(png_ptr, info_ptr->palette,
          (png_uint_32)info_ptr->num_palette);
    else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
-      png_error(png_ptr, "Valid palette required for paletted images\n");
+      png_error(png_ptr, "Valid palette required for paletted images");
 
 #if defined(PNG_WRITE_tRNS_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_tRNS)
@@ -183,7 +190,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
           info_ptr->scal_s_width, info_ptr->scal_s_height);
 #else
       png_warning(png_ptr,
-          "png_write_sCAL not supported; sCAL chunk not written.\n");
+          "png_write_sCAL not supported; sCAL chunk not written.");
 #endif
 #endif
 #endif
@@ -208,7 +215,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
    /* Check to see if we need to write text chunks */
    for (i = 0; i < info_ptr->num_text; i++)
    {
-      png_debug2(2, "Writing header text chunk %d, type %d\n", i,
+      png_debug2(2, "Writing header text chunk %d, type %d", i,
          info_ptr->text[i].compression);
       /* an internationalized chunk? */
       if (info_ptr->text[i].compression > 0)
@@ -222,7 +229,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
                          info_ptr->text[i].lang_key,
                          info_ptr->text[i].text);
 #else
-          png_warning(png_ptr, "Unable to write international text\n");
+          png_warning(png_ptr, "Unable to write international text");
 #endif
           /* Mark this chunk as written */
           info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
@@ -236,7 +243,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
             info_ptr->text[i].text, 0,
             info_ptr->text[i].compression);
 #else
-         png_warning(png_ptr, "Unable to write compressed text\n");
+         png_warning(png_ptr, "Unable to write compressed text");
 #endif
          /* Mark this chunk as written */
          info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
@@ -249,7 +256,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
                          info_ptr->text[i].text,
                          0);
 #else
-         png_warning(png_ptr, "Unable to write uncompressed text\n");
+         png_warning(png_ptr, "Unable to write uncompressed text");
 #endif
          /* Mark this chunk as written */
          info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
@@ -261,7 +268,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
    {
        png_unknown_chunk *up;
 
-       png_debug(5, "writing extra chunks\n");
+       png_debug(5, "writing extra chunks");
 
        for (up = info_ptr->unknown_chunks;
             up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
@@ -289,7 +296,9 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
 void PNGAPI
 png_write_end(png_structp png_ptr, png_infop info_ptr)
 {
-   png_debug(1, "in png_write_end\n");
+   png_debug(1, "in png_write_end");
+   if (png_ptr == NULL)
+      return;
    if (!(png_ptr->mode & PNG_HAVE_IDAT))
       png_error(png_ptr, "No IDATs written into file");
 
@@ -309,7 +318,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
       /* loop through comment chunks */
       for (i = 0; i < info_ptr->num_text; i++)
       {
-         png_debug2(2, "Writing trailer text chunk %d, type %d\n", i,
+         png_debug2(2, "Writing trailer text chunk %d, type %d", i,
             info_ptr->text[i].compression);
          /* an internationalized chunk? */
          if (info_ptr->text[i].compression > 0)
@@ -323,7 +332,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
                          info_ptr->text[i].lang_key,
                          info_ptr->text[i].text);
 #else
-             png_warning(png_ptr, "Unable to write international text\n");
+             png_warning(png_ptr, "Unable to write international text");
 #endif
              /* Mark this chunk as written */
              info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
@@ -336,7 +345,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
                info_ptr->text[i].text, 0,
                info_ptr->text[i].compression);
 #else
-            png_warning(png_ptr, "Unable to write compressed text\n");
+            png_warning(png_ptr, "Unable to write compressed text");
 #endif
             /* Mark this chunk as written */
             info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
@@ -348,7 +357,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
             png_write_tEXt(png_ptr, info_ptr->text[i].key,
                info_ptr->text[i].text, 0);
 #else
-            png_warning(png_ptr, "Unable to write uncompressed text\n");
+            png_warning(png_ptr, "Unable to write uncompressed text");
 #endif
 
             /* Mark this chunk as written */
@@ -361,7 +370,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
    {
        png_unknown_chunk *up;
 
-       png_debug(5, "writing extra chunks\n");
+       png_debug(5, "writing extra chunks");
 
        for (up = info_ptr->unknown_chunks;
             up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
@@ -384,9 +393,16 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
 
    /* write end of PNG file */
    png_write_IEND(png_ptr);
-#if 0
-/* This flush, added in libpng-1.0.8,  causes some applications to crash
-   because they do not set png_ptr->output_flush_fn */
+   /* This flush, added in libpng-1.0.8, removed from libpng-1.0.9beta03,
+    * and restored again in libpng-1.2.30, may cause some applications that
+    * do not set png_ptr->output_flush_fn to crash.  If your application
+    * experiences a problem, please try building libpng with
+    * PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED defined, and report the event to
+    * png-mng-implement at lists.sf.net .  This kludge will be removed
+    * from libpng-1.4.0.
+    */
+#if defined(PNG_WRITE_FLUSH_SUPPORTED) && \
+    defined(PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED)
    png_flush(png_ptr);
 #endif
 }
@@ -397,7 +413,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
 void PNGAPI
 png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime)
 {
-   png_debug(1, "in png_convert_from_struct_tm\n");
+   png_debug(1, "in png_convert_from_struct_tm");
    ptime->year = (png_uint_16)(1900 + ttime->tm_year);
    ptime->month = (png_byte)(ttime->tm_mon + 1);
    ptime->day = (png_byte)ttime->tm_mday;
@@ -411,7 +427,7 @@ png_convert_from_time_t(png_timep ptime, time_t ttime)
 {
    struct tm *tbuf;
 
-   png_debug(1, "in png_convert_from_time_t\n");
+   png_debug(1, "in png_convert_from_time_t");
    tbuf = gmtime(&ttime);
    png_convert_from_struct_tm(ptime, tbuf);
 }
@@ -435,14 +451,17 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    png_malloc_ptr malloc_fn, png_free_ptr free_fn)
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
-   png_structp png_ptr;
+#ifdef PNG_SETJMP_SUPPORTED
+    volatile
+#endif
+    png_structp png_ptr;
 #ifdef PNG_SETJMP_SUPPORTED
 #ifdef USE_FAR_KEYWORD
    jmp_buf jmpbuf;
 #endif
 #endif
    int i;
-   png_debug(1, "in png_create_write_struct\n");
+   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);
@@ -452,12 +471,6 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    if (png_ptr == NULL)
       return (NULL);
 
-#if !defined(PNG_1_0_X)
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
-   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
-#endif
-#endif /* PNG_1_0_X */
-
    /* added at libpng-1.2.6 */
 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
    png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
@@ -472,12 +485,12 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 #endif
    {
       png_free(png_ptr, png_ptr->zbuf);
-      png_ptr->zbuf=NULL;
+       png_ptr->zbuf=NULL;
       png_destroy_struct(png_ptr);
       return (NULL);
    }
 #ifdef USE_FAR_KEYWORD
-   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
 #endif
 #endif
 
@@ -486,12 +499,15 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 #endif /* PNG_USER_MEM_SUPPORTED */
    png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
 
-   i=0;
-   do
+   if (user_png_ver)
    {
-     if(user_png_ver[i] != png_libpng_ver[i])
-        png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
-   } while (png_libpng_ver[i++]);
+     i=0;
+     do
+     {
+       if (user_png_ver[i] != png_libpng_ver[i])
+          png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
+     } while (png_libpng_ver[i++]);
+   }
 
    if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
    {
@@ -508,11 +524,13 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
         char msg[80];
         if (user_png_ver)
         {
-          sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+          png_snprintf(msg, 80,
+             "Application was compiled with png.h from libpng-%.20s",
              user_png_ver);
           png_warning(png_ptr, msg);
         }
-        sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
+        png_snprintf(msg, 80,
+           "Application  is  running with png.c from libpng-%.20s",
            png_libpng_ver);
         png_warning(png_ptr, msg);
 #endif
@@ -544,7 +562,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
       PNG_ABORT();
-   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
 #else
    if (setjmp(png_ptr->jmpbuf))
       PNG_ABORT();
@@ -554,6 +572,8 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 }
 
 /* Initialize png_ptr structure, and allocate any memory needed */
+#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
+/* Deprecated. */
 #undef png_write_init
 void PNGAPI
 png_write_init(png_structp png_ptr)
@@ -567,24 +587,27 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
    png_size_t png_struct_size, png_size_t png_info_size)
 {
    /* We only come here via pre-1.0.12-compiled applications */
+   if (png_ptr == NULL) return;
 #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
-   if(png_sizeof(png_struct) > png_struct_size ||
+   if (png_sizeof(png_struct) > png_struct_size ||
       png_sizeof(png_info) > png_info_size)
    {
       char msg[80];
       png_ptr->warning_fn=NULL;
       if (user_png_ver)
       {
-        sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+        png_snprintf(msg, 80,
+           "Application was compiled with png.h from libpng-%.20s",
            user_png_ver);
         png_warning(png_ptr, msg);
       }
-      sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
+      png_snprintf(msg, 80,
+         "Application  is  running with png.c from libpng-%.20s",
          png_libpng_ver);
       png_warning(png_ptr, msg);
    }
 #endif
-   if(png_sizeof(png_struct) > png_struct_size)
+   if (png_sizeof(png_struct) > png_struct_size)
      {
        png_ptr->error_fn=NULL;
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
@@ -593,7 +616,7 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
        png_error(png_ptr,
        "The png struct allocated by the application for writing is too small.");
      }
-   if(png_sizeof(png_info) > png_info_size)
+   if (png_sizeof(png_info) > png_info_size)
      {
        png_ptr->error_fn=NULL;
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
@@ -604,6 +627,7 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
      }
    png_write_init_3(&png_ptr, user_png_ver, png_struct_size);
 }
+#endif /* PNG_1_0_X || PNG_1_2_X */
 
 
 void PNGAPI
@@ -614,7 +638,12 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
 #ifdef PNG_SETJMP_SUPPORTED
    jmp_buf tmp_jmp; /* to save current jump buffer */
 #endif
+
    int i = 0;
+
+   if (png_ptr == NULL)
+      return;
+
    do
    {
      if (user_png_ver[i] != png_libpng_ver[i])
@@ -624,17 +653,17 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
 #else
        png_ptr->warning_fn=NULL;
        png_warning(png_ptr,
-     "Application uses deprecated png_write_init() and should be recompiled.");
+ "Application uses deprecated png_write_init() and should be recompiled.");
        break;
 #endif
      }
    } while (png_libpng_ver[i++]);
 
-   png_debug(1, "in png_write_init_3\n");
+   png_debug(1, "in png_write_init_3");
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* save jump buffer and error functions */
-   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
+   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
 #endif
 
    if (png_sizeof(png_struct) > png_struct_size)
@@ -645,7 +674,7 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
      }
 
    /* reset all variables to 0 */
-   png_memset(png_ptr, 0, png_sizeof (png_struct));
+   png_memset(png_ptr, 0, png_sizeof(png_struct));
 
    /* added at libpng-1.2.6 */
 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
@@ -653,15 +682,9 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
    png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
 #endif
 
-#if !defined(PNG_1_0_X)
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
-   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
-#endif
-#endif /* PNG_1_0_X */
-
 #ifdef PNG_SETJMP_SUPPORTED
    /* restore jump buffer */
-   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
 #endif
 
    png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
@@ -690,7 +713,11 @@ png_write_rows(png_structp png_ptr, png_bytepp row,
    png_uint_32 i; /* row counter */
    png_bytepp rp; /* row pointer */
 
-   png_debug(1, "in png_write_rows\n");
+   png_debug(1, "in png_write_rows");
+
+   if (png_ptr == NULL)
+      return;
+
    /* loop through the rows */
    for (i = 0, rp = row; i < num_rows; i++, rp++)
    {
@@ -708,7 +735,10 @@ png_write_image(png_structp png_ptr, png_bytepp image)
    int pass, num_pass; /* pass variables */
    png_bytepp rp; /* points to current row */
 
-   png_debug(1, "in png_write_image\n");
+   if (png_ptr == NULL)
+      return;
+
+   png_debug(1, "in png_write_image");
 #if defined(PNG_WRITE_INTERLACING_SUPPORTED)
    /* intialize interlace handling.  If image is not interlaced,
       this will set pass to 1 */
@@ -731,8 +761,11 @@ png_write_image(png_structp png_ptr, png_bytepp image)
 void PNGAPI
 png_write_row(png_structp png_ptr, png_bytep row)
 {
-   png_debug2(1, "in png_write_row (row %ld, pass %d)\n",
+   if (png_ptr == NULL)
+      return;
+   png_debug2(1, "in png_write_row (row %ld, pass %d)",
       png_ptr->row_number, png_ptr->pass);
+
    /* initialize transformations and other stuff if first time */
    if (png_ptr->row_number == 0 && png_ptr->pass == 0)
    {
@@ -844,12 +877,12 @@ png_write_row(png_structp png_ptr, png_bytep row)
    png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
       png_ptr->row_info.width);
 
-   png_debug1(3, "row_info->color_type = %d\n", png_ptr->row_info.color_type);
-   png_debug1(3, "row_info->width = %lu\n", png_ptr->row_info.width);
-   png_debug1(3, "row_info->channels = %d\n", png_ptr->row_info.channels);
-   png_debug1(3, "row_info->bit_depth = %d\n", png_ptr->row_info.bit_depth);
-   png_debug1(3, "row_info->pixel_depth = %d\n", png_ptr->row_info.pixel_depth);
-   png_debug1(3, "row_info->rowbytes = %lu\n", png_ptr->row_info.rowbytes);
+   png_debug1(3, "row_info->color_type = %d", png_ptr->row_info.color_type);
+   png_debug1(3, "row_info->width = %lu", png_ptr->row_info.width);
+   png_debug1(3, "row_info->channels = %d", png_ptr->row_info.channels);
+   png_debug1(3, "row_info->bit_depth = %d", png_ptr->row_info.bit_depth);
+   png_debug1(3, "row_info->pixel_depth = %d", png_ptr->row_info.pixel_depth);
+   png_debug1(3, "row_info->rowbytes = %lu", png_ptr->row_info.rowbytes);
 
    /* Copy user's row into buffer, leaving room for filter byte. */
    png_memcpy_check(png_ptr, png_ptr->row_buf + 1, row,
@@ -885,7 +918,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
     * 4. The filter_method is 64 and
     * 5. The color_type is RGB or RGBA
     */
-   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+   if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
       (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
    {
       /* Intrapixel differencing */
@@ -905,7 +938,9 @@ png_write_row(png_structp png_ptr, png_bytep row)
 void PNGAPI
 png_set_flush(png_structp png_ptr, int nrows)
 {
-   png_debug(1, "in png_set_flush\n");
+   png_debug(1, "in png_set_flush");
+   if (png_ptr == NULL)
+      return;
    png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
 }
 
@@ -915,7 +950,9 @@ png_write_flush(png_structp png_ptr)
 {
    int wrote_IDAT;
 
-   png_debug(1, "in png_write_flush\n");
+   png_debug(1, "in png_write_flush");
+   if (png_ptr == NULL)
+      return;
    /* We have already written out all of the data */
    if (png_ptr->row_number >= png_ptr->num_rows)
      return;
@@ -973,7 +1010,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
    png_voidp mem_ptr = NULL;
 #endif
 
-   png_debug(1, "in png_destroy_write_struct\n");
+   png_debug(1, "in png_destroy_write_struct");
    if (png_ptr_ptr != NULL)
    {
       png_ptr = *png_ptr_ptr;
@@ -983,21 +1020,32 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
 #endif
    }
 
+#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)
    {
-      png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
+      if (png_ptr != NULL)
+      {
+        png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
 
 #if defined(PNG_UNKNOWN_CHUNKS_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;
-      }
+        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
+      }
 
 #ifdef PNG_USER_MEM_SUPPORTED
       png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
@@ -1036,18 +1084,20 @@ png_write_destroy(png_structp png_ptr)
    png_free_ptr free_fn;
 #endif
 
-   png_debug(1, "in png_write_destroy\n");
+   png_debug(1, "in png_write_destroy");
    /* free any memory zlib uses */
    deflateEnd(&png_ptr->zstream);
 
    /* free our memory.  png_free checks NULL for us. */
    png_free(png_ptr, png_ptr->zbuf);
    png_free(png_ptr, png_ptr->row_buf);
+#ifndef PNG_NO_WRITE_FILTER
    png_free(png_ptr, png_ptr->prev_row);
    png_free(png_ptr, png_ptr->sub_row);
    png_free(png_ptr, png_ptr->up_row);
    png_free(png_ptr, png_ptr->avg_row);
    png_free(png_ptr, png_ptr->paeth_row);
+#endif
 
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
    png_free(png_ptr, png_ptr->time_buffer);
@@ -1063,7 +1113,7 @@ png_write_destroy(png_structp png_ptr)
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* reset structure */
-   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
+   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
 #endif
 
    error_fn = png_ptr->error_fn;
@@ -1073,7 +1123,7 @@ png_write_destroy(png_structp png_ptr)
    free_fn = png_ptr->free_fn;
 #endif
 
-   png_memset(png_ptr, 0, png_sizeof (png_struct));
+   png_memset(png_ptr, 0, png_sizeof(png_struct));
 
    png_ptr->error_fn = error_fn;
    png_ptr->warning_fn = warning_fn;
@@ -1083,7 +1133,7 @@ png_write_destroy(png_structp png_ptr)
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
-   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
 #endif
 }
 
@@ -1091,9 +1141,11 @@ png_write_destroy(png_structp png_ptr)
 void PNGAPI
 png_set_filter(png_structp png_ptr, int method, int filters)
 {
-   png_debug(1, "in png_set_filter\n");
+   png_debug(1, "in png_set_filter");
+   if (png_ptr == NULL)
+      return;
 #if defined(PNG_MNG_FEATURES_SUPPORTED)
-   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+   if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
       (method == PNG_INTRAPIXEL_DIFFERENCING))
          method = PNG_FILTER_TYPE_BASE;
 #endif
@@ -1101,15 +1153,26 @@ png_set_filter(png_structp png_ptr, int method, int filters)
    {
       switch (filters & (PNG_ALL_FILTERS | 0x07))
       {
+#ifndef PNG_NO_WRITE_FILTER
          case 5:
          case 6:
          case 7: png_warning(png_ptr, "Unknown row filter for method 0");
-         case PNG_FILTER_VALUE_NONE:  png_ptr->do_filter=PNG_FILTER_NONE; break;
-         case PNG_FILTER_VALUE_SUB:   png_ptr->do_filter=PNG_FILTER_SUB;  break;
-         case PNG_FILTER_VALUE_UP:    png_ptr->do_filter=PNG_FILTER_UP;   break;
-         case PNG_FILTER_VALUE_AVG:   png_ptr->do_filter=PNG_FILTER_AVG;  break;
-         case PNG_FILTER_VALUE_PAETH: png_ptr->do_filter=PNG_FILTER_PAETH;break;
+#endif /* PNG_NO_WRITE_FILTER */
+         case PNG_FILTER_VALUE_NONE:
+              png_ptr->do_filter=PNG_FILTER_NONE; break;
+#ifndef PNG_NO_WRITE_FILTER
+         case PNG_FILTER_VALUE_SUB:
+              png_ptr->do_filter=PNG_FILTER_SUB; break;
+         case PNG_FILTER_VALUE_UP:
+              png_ptr->do_filter=PNG_FILTER_UP; break;
+         case PNG_FILTER_VALUE_AVG:
+              png_ptr->do_filter=PNG_FILTER_AVG; break;
+         case PNG_FILTER_VALUE_PAETH:
+              png_ptr->do_filter=PNG_FILTER_PAETH; break;
          default: png_ptr->do_filter = (png_byte)filters; break;
+#else
+         default: png_warning(png_ptr, "Unknown row filter for method 0");
+#endif /* PNG_NO_WRITE_FILTER */
       }
 
       /* If we have allocated the row_buf, this means we have already started
@@ -1123,6 +1186,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
        */
       if (png_ptr->row_buf != NULL)
       {
+#ifndef PNG_NO_WRITE_FILTER
          if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
          {
             png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
@@ -1177,6 +1241,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
          }
 
          if (png_ptr->do_filter == PNG_NO_FILTERS)
+#endif /* PNG_NO_WRITE_FILTER */
             png_ptr->do_filter = PNG_FILTER_NONE;
       }
    }
@@ -1199,7 +1264,9 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
 {
    int i;
 
-   png_debug(1, "in png_set_filter_heuristics\n");
+   png_debug(1, "in png_set_filter_heuristics");
+   if (png_ptr == NULL)
+      return;
    if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
    {
       png_warning(png_ptr, "Unknown filter heuristic method");
@@ -1311,7 +1378,9 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
 void PNGAPI
 png_set_compression_level(png_structp png_ptr, int level)
 {
-   png_debug(1, "in png_set_compression_level\n");
+   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;
 }
@@ -1319,7 +1388,9 @@ png_set_compression_level(png_structp png_ptr, int level)
 void PNGAPI
 png_set_compression_mem_level(png_structp png_ptr, int mem_level)
 {
-   png_debug(1, "in png_set_compression_mem_level\n");
+   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;
 }
@@ -1327,7 +1398,9 @@ png_set_compression_mem_level(png_structp png_ptr, int mem_level)
 void PNGAPI
 png_set_compression_strategy(png_structp png_ptr, int strategy)
 {
-   png_debug(1, "in png_set_compression_strategy\n");
+   png_debug(1, "in png_set_compression_strategy");
+   if (png_ptr == NULL)
+      return;
    png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
    png_ptr->zlib_strategy = strategy;
 }
@@ -1335,6 +1408,8 @@ png_set_compression_strategy(png_structp png_ptr, int strategy)
 void PNGAPI
 png_set_compression_window_bits(png_structp 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");
    else if (window_bits < 8)
@@ -1354,7 +1429,9 @@ png_set_compression_window_bits(png_structp png_ptr, int window_bits)
 void PNGAPI
 png_set_compression_method(png_structp png_ptr, int method)
 {
-   png_debug(1, "in png_set_compression_method\n");
+   png_debug(1, "in png_set_compression_method");
+   if (png_ptr == NULL)
+      return;
    if (method != 8)
       png_warning(png_ptr, "Only compression method 8 is supported by PNG");
    png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD;
@@ -1364,6 +1441,8 @@ png_set_compression_method(png_structp png_ptr, int method)
 void PNGAPI
 png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
 {
+   if (png_ptr == NULL)
+      return;
    png_ptr->write_row_fn = write_row_fn;
 }
 
@@ -1372,7 +1451,9 @@ void PNGAPI
 png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
    write_user_transform_fn)
 {
-   png_debug(1, "in png_set_write_user_transform_fn\n");
+   png_debug(1, "in png_set_write_user_transform_fn");
+   if (png_ptr == NULL)
+      return;
    png_ptr->transformations |= PNG_USER_TRANSFORM;
    png_ptr->write_user_transform_fn = write_user_transform_fn;
 }
@@ -1384,6 +1465,8 @@ void PNGAPI
 png_write_png(png_structp png_ptr, png_infop info_ptr,
               int transforms, voidp params)
 {
+   if (png_ptr == NULL || info_ptr == NULL)
+      return;
 #if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
    /* invert the alpha channel from opacity to transparency */
    if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
@@ -1423,11 +1506,11 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
 #endif
 
 #if defined(PNG_WRITE_FILLER_SUPPORTED)
-   /* Get rid of filler (OR ALPHA) bytes, pack XRGB/RGBX/ARGB/RGBA into
-    * RGB (4 channels -> 3 channels). The second parameter is not used.
-    */
-   if (transforms & PNG_TRANSFORM_STRIP_FILLER)
-       png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
+   /* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
+  if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
+      png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
+  else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE)
+      png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
 #endif
 
 #if defined(PNG_WRITE_BGR_SUPPORTED)
@@ -1457,8 +1540,8 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
    /* It is REQUIRED to call this to finish writing the rest of the file */
    png_write_end(png_ptr, info_ptr);
 
-   if(transforms == 0 || params == NULL)
-      /* quiet compiler warnings */ return;
+   transforms = transforms; /* quiet compiler warnings */
+   params = params;
 }
 #endif
 #endif /* PNG_WRITE_SUPPORTED */

pngwtran.c

@@ -1,9 +1,9 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * libpng version 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.9 April 14, 2006
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2006 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.)
  */
@@ -18,14 +18,14 @@
 void /* PRIVATE */
 png_do_write_transformations(png_structp png_ptr)
 {
-   png_debug(1, "in png_do_write_transformations\n");
+   png_debug(1, "in png_do_write_transformations");
 
    if (png_ptr == NULL)
       return;
 
 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
    if (png_ptr->transformations & PNG_USER_TRANSFORM)
-      if(png_ptr->write_user_transform_fn != NULL)
+      if (png_ptr->write_user_transform_fn != NULL)
         (*(png_ptr->write_user_transform_fn)) /* user write transform function */
           (png_ptr,                    /* png_ptr */
            &(png_ptr->row_info),       /* row_info:     */
@@ -60,14 +60,14 @@ png_do_write_transformations(png_structp png_ptr)
       png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
          &(png_ptr->shift));
 #endif
-#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
-   if (png_ptr->transformations & PNG_INVERT_ALPHA)
-      png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
 #if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
    if (png_ptr->transformations & PNG_SWAP_ALPHA)
       png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
 #endif
+#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
+   if (png_ptr->transformations & PNG_INVERT_ALPHA)
+      png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
 #if defined(PNG_WRITE_BGR_SUPPORTED)
    if (png_ptr->transformations & PNG_BGR)
       png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
@@ -86,7 +86,7 @@ png_do_write_transformations(png_structp png_ptr)
 void /* PRIVATE */
 png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
 {
-   png_debug(1, "in png_do_pack\n");
+   png_debug(1, "in png_do_pack");
    if (row_info->bit_depth == 8 &&
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
        row != NULL && row_info != NULL &&
@@ -212,7 +212,7 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
 void /* PRIVATE */
 png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
 {
-   png_debug(1, "in png_do_shift\n");
+   png_debug(1, "in png_do_shift");
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
    if (row != NULL && row_info != NULL &&
 #else
@@ -336,7 +336,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
 void /* PRIVATE */
 png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_write_swap_alpha\n");
+   png_debug(1, "in png_do_write_swap_alpha");
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
    if (row != NULL && row_info != NULL)
 #endif
@@ -424,7 +424,7 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
 void /* PRIVATE */
 png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_write_invert_alpha\n");
+   png_debug(1, "in png_do_write_invert_alpha");
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
    if (row != NULL && row_info != NULL)
 #endif
@@ -439,9 +439,12 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
             png_uint_32 row_width = row_info->width;
             for (i = 0, sp = dp = row; i < row_width; i++)
             {
+               /* does nothing
                *(dp++) = *(sp++);
                *(dp++) = *(sp++);
                *(dp++) = *(sp++);
+               */
+               sp+=3; dp = sp;
                *(dp++) = (png_byte)(255 - *(sp++));
             }
          }
@@ -454,12 +457,15 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
 
             for (i = 0, sp = dp = row; i < row_width; i++)
             {
+               /* does nothing
                *(dp++) = *(sp++);
                *(dp++) = *(sp++);
                *(dp++) = *(sp++);
                *(dp++) = *(sp++);
                *(dp++) = *(sp++);
                *(dp++) = *(sp++);
+               */
+               sp+=6; dp = sp;
                *(dp++) = (png_byte)(255 - *(sp++));
                *(dp++) = (png_byte)(255 - *(sp++));
             }
@@ -489,8 +495,11 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
 
             for (i = 0, sp = dp = row; i < row_width; i++)
             {
+               /* does nothing
                *(dp++) = *(sp++);
                *(dp++) = *(sp++);
+               */
+               sp+=2; dp = sp;
                *(dp++) = (png_byte)(255 - *(sp++));
                *(dp++) = (png_byte)(255 - *(sp++));
             }
@@ -505,7 +514,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
 void /* PRIVATE */
 png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_write_intrapixel\n");
+   png_debug(1, "in png_do_write_intrapixel");
    if (
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
        row != NULL && row_info != NULL &&
@@ -549,8 +558,8 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
             png_uint_32 s0   = (*(rp  ) << 8) | *(rp+1);
             png_uint_32 s1   = (*(rp+2) << 8) | *(rp+3);
             png_uint_32 s2   = (*(rp+4) << 8) | *(rp+5);
-            png_uint_32 red  = (png_uint_32)((s0-s1) & 0xffffL);
-            png_uint_32 blue = (png_uint_32)((s2-s1) & 0xffffL);
+            png_uint_32 red  = (png_uint_32)((s0 - s1) & 0xffffL);
+            png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL);
             *(rp  ) = (png_byte)((red >> 8) & 0xff);
             *(rp+1) = (png_byte)(red & 0xff);
             *(rp+4) = (png_byte)((blue >> 8) & 0xff);

projects/cbuilder5/libpng.bpf

@@ -1,22 +1,22 @@
-USEUNIT("libpng.cpp");
-USEUNIT("..\..\png.c");
-USEUNIT("..\..\pngerror.c");
-USEUNIT("..\..\pngget.c");
-USEUNIT("..\..\pngmem.c");
-USEUNIT("..\..\pngpread.c");
-USEUNIT("..\..\pngread.c");
-USEUNIT("..\..\pngrio.c");
-USEUNIT("..\..\pngrtran.c");
-USEUNIT("..\..\pngrutil.c");
-USEUNIT("..\..\pngset.c");
-USEUNIT("..\..\pngtrans.c");
-USEUNIT("..\..\pngwio.c");
-USEUNIT("..\..\pngwrite.c");
-USEUNIT("..\..\pngwtran.c");
-USEUNIT("..\..\pngwutil.c");
-USELIB("..\..\..\zlib\zlib.lib");
-//---------------------------------------------------------------------------
-This file is used by the project manager only and should be treated like the project file
-
-
-DllEntryPoint
+USEUNIT("libpng.cpp");
+USEUNIT("..\..\png.c");
+USEUNIT("..\..\pngerror.c");
+USEUNIT("..\..\pngget.c");
+USEUNIT("..\..\pngmem.c");
+USEUNIT("..\..\pngpread.c");
+USEUNIT("..\..\pngread.c");
+USEUNIT("..\..\pngrio.c");
+USEUNIT("..\..\pngrtran.c");
+USEUNIT("..\..\pngrutil.c");
+USEUNIT("..\..\pngset.c");
+USEUNIT("..\..\pngtrans.c");
+USEUNIT("..\..\pngwio.c");
+USEUNIT("..\..\pngwrite.c");
+USEUNIT("..\..\pngwtran.c");
+USEUNIT("..\..\pngwutil.c");
+USELIB("..\..\..\zlib\zlib.lib");
+//---------------------------------------------------------------------------
+This file is used by the project manager only and should be treated like the project file
+
+
+DllEntryPoint

projects/cbuilder5/libpng.bpg

@@ -1,25 +1,25 @@
-#------------------------------------------------------------------------------
-VERSION = BWS.01
-#------------------------------------------------------------------------------
-!ifndef ROOT
-ROOT = $(MAKEDIR)\..
-!endif
-#------------------------------------------------------------------------------
-MAKE = $(ROOT)\bin\make.exe -$(MAKEFLAGS) -f$**
-DCC = $(ROOT)\bin\dcc32.exe $**
-BRCC = $(ROOT)\bin\brcc32.exe $**
-#------------------------------------------------------------------------------
-PROJECTS = libpngstat.lib libpng.dll
-#------------------------------------------------------------------------------
-default: $(PROJECTS)
-#------------------------------------------------------------------------------
-
-libpngstat.lib: libpngstat.bpr
-  $(ROOT)\bin\bpr2mak -t$(ROOT)\bin\deflib.bmk $**
-  $(ROOT)\bin\make -$(MAKEFLAGS) -f$*.mak
-
-libpng.dll: libpng.bpr
-  $(ROOT)\bin\bpr2mak $**
-  $(ROOT)\bin\make -$(MAKEFLAGS) -f$*.mak
-
-
+#------------------------------------------------------------------------------
+VERSION = BWS.01
+#------------------------------------------------------------------------------
+!ifndef ROOT
+ROOT = $(MAKEDIR)\..
+!endif
+#------------------------------------------------------------------------------
+MAKE = $(ROOT)\bin\make.exe -$(MAKEFLAGS) -f$**
+DCC = $(ROOT)\bin\dcc32.exe $**
+BRCC = $(ROOT)\bin\brcc32.exe $**
+#------------------------------------------------------------------------------
+PROJECTS = libpngstat.lib libpng.dll
+#------------------------------------------------------------------------------
+default: $(PROJECTS)
+#------------------------------------------------------------------------------
+
+libpngstat.lib: libpngstat.bpr
+  $(ROOT)\bin\bpr2mak -t$(ROOT)\bin\deflib.bmk $**
+  $(ROOT)\bin\make -$(MAKEFLAGS) -f$*.mak
+
+libpng.dll: libpng.bpr
+  $(ROOT)\bin\bpr2mak $**
+  $(ROOT)\bin\make -$(MAKEFLAGS) -f$*.mak
+
+

projects/cbuilder5/libpng.bpr

@@ -1,157 +1,157 @@
-<?xml version='1.0' encoding='utf-8' ?>
-<!-- C++Builder XML Project -->
-<PROJECT>
-  <MACROS>
-    <VERSION value="BCB.05.03"/>
-    <PROJECT value="libpng.dll"/>
-    <OBJFILES value="libpng.obj ..\..\pngwutil.obj ..\..\pngerror.obj ..\..\pngget.obj 
-      ..\..\pngmem.obj ..\..\pngpread.obj ..\..\pngread.obj ..\..\pngrio.obj 
-      ..\..\pngrtran.obj ..\..\pngrutil.obj ..\..\pngset.obj ..\..\pngtrans.obj 
-      ..\..\pngwio.obj ..\..\pngwrite.obj ..\..\pngwtran.obj ..\..\png.obj"/>
-    <RESFILES value=""/>
-    <DEFFILE value=""/>
-    <RESDEPEN value="$(RESFILES)"/>
-    <LIBFILES value="..\..\..\zlib\zlib.lib"/>
-    <LIBRARIES value="bcbsmp50.lib dclocx50.lib NMFast50.lib Tee50.lib Vclx50.lib Vcl50.lib"/>
-    <SPARELIBS value="Vcl50.lib Vclx50.lib Tee50.lib NMFast50.lib dclocx50.lib bcbsmp50.lib"/>
-    <PACKAGES value="Vcl50.bpi Vclx50.bpi bcbsmp50.bpi Qrpt50.bpi Vcldb50.bpi Vclbde50.bpi 
-      ibsmp50.bpi vcldbx50.bpi TeeUI50.bpi TeeDB50.bpi Tee50.bpi TeeQR50.bpi 
-      VCLIB50.bpi bcbie50.bpi vclie50.bpi Inetdb50.bpi Inet50.bpi NMFast50.bpi 
-      dclocx50.bpi bcb97axserver50.bpi SIMULUSCOMPONENTS.bpi Simulus2.bpi"/>
-    <PATHCPP value=".;..\.."/>
-    <PATHPAS value=".;"/>
-    <PATHRC value=".;"/>
-    <PATHASM value=".;"/>
-    <DEBUGLIBPATH value="$(BCB)\lib\debug"/>
-    <RELEASELIBPATH value="$(BCB)\lib\release"/>
-    <LINKER value="tlink32"/>
-    <USERDEFINES value="PNG_BUILD_DLL;PNG_NO_MODULEDEF"/>
-    <SYSDEFINES value="NO_STRICT;_NO_VCL;_RTLDLL"/>
-    <MAINSOURCE value="libpng.bpf"/>
-    <INCLUDEPATH value="..\..;..\..\..\zlib;$(BCB)\include"/>
-    <LIBPATH value="..\..;$(BCB)\lib\obj;$(BCB)\lib"/>
-    <WARNINGS value="-w8092 -w8091 -w8090 -w8089 -w8087 -wprc -wucp -wstv -wstu -wsig -wpin 
-      -wnod -wnak -wdef -wcln -wbbf -wasm -wamp -wamb"/>
-  </MACROS>
-  <OPTIONS>
-    <CFLAG1 value="-WD -O2 -w -Vx -Ve -x- -RT- -X- -a8 -5 -b- -d -k- -vi -tWD -tWM -c"/>
-    <PFLAGS value="-$Y- -$L- -$D- -$C- -v -JPHNE -M"/>
-    <RFLAGS value=""/>
-    <AFLAGS value="/mx /w2 /zn"/>
-    <LFLAGS value="-D&quot;&quot; -aa -Tpd -x -Gn -Gi -w"/>
-  </OPTIONS>
-  <LINKER>
-    <ALLOBJ value="c0d32.obj $(OBJFILES)"/>
-    <ALLRES value="$(RESFILES)"/>
-    <ALLLIB value="$(LIBFILES) $(LIBRARIES) import32.lib cw32mti.lib"/>
-  </LINKER>
-  <IDEOPTIONS>
-[Version Info]
-IncludeVerInfo=0
-AutoIncBuild=0
-MajorVer=1
-MinorVer=0
-Release=0
-Build=0
-Debug=0
-PreRelease=0
-Special=0
-Private=0
-DLL=1
-Locale=2057
-CodePage=1252
-
-[Version Info Keys]
-CompanyName=
-FileDescription=
-FileVersion=1.0.0.0
-InternalName=
-LegalCopyright=
-LegalTrademarks=
-OriginalFilename=
-ProductName=
-ProductVersion=
-Comments=
-
-[HistoryLists\hlIncludePath]
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-
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-
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-DebugSourceDirs=
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-[Parameters]
-RunParams=
-HostApplication=P:\Development\Executables\LibPNGTestApp.exe
-RemoteHost=
-RemotePath=
-RemoteDebug=0
-
-[Compiler]
-ShowInfoMsgs=0
-LinkDebugVcl=0
-LinkCGLIB=0
-  </IDEOPTIONS>
+<?xml version='1.0' encoding='utf-8' ?>
+<!-- C++Builder XML Project -->
+<PROJECT>
+  <MACROS>
+    <VERSION value="BCB.05.03"/>
+    <PROJECT value="libpng.dll"/>
+    <OBJFILES value="libpng.obj ..\..\pngwutil.obj ..\..\pngerror.obj ..\..\pngget.obj 
+      ..\..\pngmem.obj ..\..\pngpread.obj ..\..\pngread.obj ..\..\pngrio.obj 
+      ..\..\pngrtran.obj ..\..\pngrutil.obj ..\..\pngset.obj ..\..\pngtrans.obj 
+      ..\..\pngwio.obj ..\..\pngwrite.obj ..\..\pngwtran.obj ..\..\png.obj"/>
+    <RESFILES value=""/>
+    <DEFFILE value=""/>
+    <RESDEPEN value="$(RESFILES)"/>
+    <LIBFILES value="..\..\..\zlib\zlib.lib"/>
+    <LIBRARIES value="bcbsmp50.lib dclocx50.lib NMFast50.lib Tee50.lib Vclx50.lib Vcl50.lib"/>
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+      ibsmp50.bpi vcldbx50.bpi TeeUI50.bpi TeeDB50.bpi Tee50.bpi TeeQR50.bpi 
+      VCLIB50.bpi bcbie50.bpi vclie50.bpi Inetdb50.bpi Inet50.bpi NMFast50.bpi 
+      dclocx50.bpi bcb97axserver50.bpi SIMULUSCOMPONENTS.bpi Simulus2.bpi"/>
+    <PATHCPP value=".;..\.."/>
+    <PATHPAS value=".;"/>
+    <PATHRC value=".;"/>
+    <PATHASM value=".;"/>
+    <DEBUGLIBPATH value="$(BCB)\lib\debug"/>
+    <RELEASELIBPATH value="$(BCB)\lib\release"/>
+    <LINKER value="tlink32"/>
+    <USERDEFINES value="PNG_BUILD_DLL;PNG_NO_MODULEDEF"/>
+    <SYSDEFINES value="NO_STRICT;_NO_VCL;_RTLDLL"/>
+    <MAINSOURCE value="libpng.bpf"/>
+    <INCLUDEPATH value="..\..;..\..\..\zlib;$(BCB)\include"/>
+    <LIBPATH value="..\..;$(BCB)\lib\obj;$(BCB)\lib"/>
+    <WARNINGS value="-w8092 -w8091 -w8090 -w8089 -w8087 -wprc -wucp -wstv -wstu -wsig -wpin 
+      -wnod -wnak -wdef -wcln -wbbf -wasm -wamp -wamb"/>
+  </MACROS>
+  <OPTIONS>
+    <CFLAG1 value="-WD -O2 -w -Vx -Ve -x- -RT- -X- -a8 -5 -b- -d -k- -vi -tWD -tWM -c"/>
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+  <LINKER>
+    <ALLOBJ value="c0d32.obj $(OBJFILES)"/>
+    <ALLRES value="$(RESFILES)"/>
+    <ALLLIB value="$(LIBFILES) $(LIBRARIES) import32.lib cw32mti.lib"/>
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+  <IDEOPTIONS>
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+[HistoryLists\hlDebugSourcePath]
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+
+[HistoryLists\hlConditionals]
+Count=20
+Item0=ZLIB_DLL;Z_PREFIX;PNG_BUILD_DLL;PNG_NO_MODULEDEF
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+Item16=PNG_DLL;PNG_BUILD_DLL;PNG_MODULEDEF
+Item17=_HTML_FORM
+Item18=_DEBUG;_HTML_FORM
+Item19=_DEBUG
+
+[HistoryLists\hlIntOutputDir]
+Count=2
+Item0=..\Obj
+Item1=P:\Development\Obj
+
+[Debugging]
+DebugSourceDirs=
+
+[Parameters]
+RunParams=
+HostApplication=P:\Development\Executables\LibPNGTestApp.exe
+RemoteHost=
+RemotePath=
+RemoteDebug=0
+
+[Compiler]
+ShowInfoMsgs=0
+LinkDebugVcl=0
+LinkCGLIB=0
+  </IDEOPTIONS>
 </PROJECT>

projects/cbuilder5/libpng.cpp

@@ -1,29 +1,29 @@
-//---------------------------------------------------------------------------
-#include <windows.h>
-//---------------------------------------------------------------------------
-//   Important note about DLL memory management when your DLL uses the
-//   static version of the RunTime Library:
-//
-//   If your DLL exports any functions that pass String objects (or structs/
-//   classes containing nested Strings) as parameter or function results,
-//   you will need to add the library MEMMGR.LIB to both the DLL project and
-//   any other projects that use the DLL.  You will also need to use MEMMGR.LIB
-//   if any other projects which use the DLL will be performing new or delete
-//   operations on any non-TObject-derived classes which are exported from the
-//   DLL. Adding MEMMGR.LIB to your project will change the DLL and its calling
-//   EXE's to use the BORLNDMM.DLL as their memory manager.  In these cases,
-//   the file BORLNDMM.DLL should be deployed along with your DLL.
-//
-//   To avoid using BORLNDMM.DLL, pass string information using "char *" or
-//   ShortString parameters.
-//
-//   If your DLL uses the dynamic version of the RTL, you do not need to
-//   explicitly add MEMMGR.LIB as this will be done implicitly for you
-//---------------------------------------------------------------------------
-
-int WINAPI DllEntryPoint(HINSTANCE, unsigned long, void*)
-{
-    return 1;
-}
-//---------------------------------------------------------------------------
+//---------------------------------------------------------------------------
+#include <windows.h>
+//---------------------------------------------------------------------------
+//   Important note about DLL memory management when your DLL uses the
+//   static version of the RunTime Library:
+//
+//   If your DLL exports any functions that pass String objects (or structs/
+//   classes containing nested Strings) as parameter or function results,
+//   you will need to add the library MEMMGR.LIB to both the DLL project and
+//   any other projects that use the DLL.  You will also need to use MEMMGR.LIB
+//   if any other projects which use the DLL will be performing new or delete
+//   operations on any non-TObject-derived classes which are exported from the
+//   DLL. Adding MEMMGR.LIB to your project will change the DLL and its calling
+//   EXE's to use the BORLNDMM.DLL as their memory manager.  In these cases,
+//   the file BORLNDMM.DLL should be deployed along with your DLL.
+//
+//   To avoid using BORLNDMM.DLL, pass string information using "char *" or
+//   ShortString parameters.
+//
+//   If your DLL uses the dynamic version of the RTL, you do not need to
+//   explicitly add MEMMGR.LIB as this will be done implicitly for you
+//---------------------------------------------------------------------------
+
+int WINAPI DllEntryPoint(HINSTANCE, unsigned long, void*)
+{
+    return 1;
+}
+//---------------------------------------------------------------------------
  

projects/cbuilder5/libpngstat.bpf

@@ -1,22 +1,22 @@
-USEUNIT("..\..\png.c");
-USEUNIT("..\..\pngerror.c");
-USEUNIT("..\..\pngget.c");
-USEUNIT("..\..\pngmem.c");
-USEUNIT("..\..\pngpread.c");
-USEUNIT("..\..\pngread.c");
-USEUNIT("..\..\pngrio.c");
-USEUNIT("..\..\pngrtran.c");
-USEUNIT("..\..\pngrutil.c");
-USEUNIT("..\..\pngset.c");
-USEUNIT("..\..\pngtrans.c");
-USEUNIT("..\..\pngwio.c");
-USEUNIT("..\..\pngwrite.c");
-USEUNIT("..\..\pngwtran.c");
-USEUNIT("..\..\pngwutil.c");
-USELIB("..\..\..\zlib\zlib.lib");
-//---------------------------------------------------------------------------
-#define Library
-
-// To add a file to the library use the Project menu 'Add to Project'.
-
+USEUNIT("..\..\png.c");
+USEUNIT("..\..\pngerror.c");
+USEUNIT("..\..\pngget.c");
+USEUNIT("..\..\pngmem.c");
+USEUNIT("..\..\pngpread.c");
+USEUNIT("..\..\pngread.c");
+USEUNIT("..\..\pngrio.c");
+USEUNIT("..\..\pngrtran.c");
+USEUNIT("..\..\pngrutil.c");
+USEUNIT("..\..\pngset.c");
+USEUNIT("..\..\pngtrans.c");
+USEUNIT("..\..\pngwio.c");
+USEUNIT("..\..\pngwrite.c");
+USEUNIT("..\..\pngwtran.c");
+USEUNIT("..\..\pngwutil.c");
+USELIB("..\..\..\zlib\zlib.lib");
+//---------------------------------------------------------------------------
+#define Library
+
+// To add a file to the library use the Project menu 'Add to Project'.
+
  

projects/cbuilder5/libpngstat.bpr

@@ -1,109 +1,109 @@
-<?xml version='1.0' encoding='utf-8' ?>
-<!-- C++Builder XML Project -->
-<PROJECT>
-  <MACROS>
-    <VERSION value="BCB.05.03"/>
-    <PROJECT value="libpngstat.lib"/>
-    <OBJFILES value="..\..\pngerror.obj ..\..\png.obj ..\..\pngwutil.obj ..\..\pngmem.obj 
-      ..\..\pngpread.obj ..\..\pngread.obj ..\..\pngrio.obj ..\..\pngrtran.obj 
-      ..\..\pngrutil.obj ..\..\pngset.obj ..\..\pngtrans.obj ..\..\pngwio.obj 
-      ..\..\pngwrite.obj ..\..\pngwtran.obj ..\..\pngget.obj"/>
-    <RESFILES value=""/>
-    <DEFFILE value=""/>
-    <RESDEPEN value="$(RESFILES)"/>
-    <LIBFILES value="..\..\..\zlib\zlib.lib"/>
-    <LIBRARIES value=""/>
-    <PACKAGES value=""/>
-    <PATHCPP value=".;..\.."/>
-    <PATHPAS value=".;"/>
-    <PATHRC value=".;"/>
-    <PATHASM value=".;"/>
-    <LINKER value="TLib"/>
-    <USERDEFINES value=""/>
-    <SYSDEFINES value="_RTLDLL;NO_STRICT"/>
-    <MAINSOURCE value="libpngstat.bpf"/>
-    <INCLUDEPATH value="..\..;..\..\..\zlib;$(BCB)\include"/>
-    <LIBPATH value="..\..;$(BCB)\lib\obj;$(BCB)\lib"/>
-    <WARNINGS value="-w-par"/>
-    <LISTFILE value=""/>
-  </MACROS>
-  <OPTIONS>
-    <CFLAG1 value="-O2 -w -Vx -Ve -X- -a8 -5 -b- -d -k- -vi -c -tW -tWM"/>
-    <PFLAGS value="-$Y- -$L- -$D- -$C- -v -JPHNE -M"/>
-    <AFLAGS value="/mx /w2 /zn"/>
-    <LFLAGS value=""/>
-  </OPTIONS>
-  <LINKER>
-    <ALLOBJ value="$(OBJFILES)"/>
-    <ALLLIB value=""/>
-  </LINKER>
-  <IDEOPTIONS>
-[Version Info]
-IncludeVerInfo=0
-AutoIncBuild=0
-MajorVer=1
-MinorVer=0
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-Comments=
-
-[HistoryLists\hlIncludePath]
-Count=2
-Item0=..\..;P:\My Documents\Source\PNG+ZLib\zlib;$(BCB)\include
-Item1=..\..;$(BCB)\include;$(BCB)\include\vcl
-
-[HistoryLists\hlLibraryPath]
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+<?xml version='1.0' encoding='utf-8' ?>
+<!-- C++Builder XML Project -->
+<PROJECT>
+  <MACROS>
+    <VERSION value="BCB.05.03"/>
+    <PROJECT value="libpngstat.lib"/>
+    <OBJFILES value="..\..\pngerror.obj ..\..\png.obj ..\..\pngwutil.obj ..\..\pngmem.obj 
+      ..\..\pngpread.obj ..\..\pngread.obj ..\..\pngrio.obj ..\..\pngrtran.obj 
+      ..\..\pngrutil.obj ..\..\pngset.obj ..\..\pngtrans.obj ..\..\pngwio.obj 
+      ..\..\pngwrite.obj ..\..\pngwtran.obj ..\..\pngget.obj"/>
+    <RESFILES value=""/>
+    <DEFFILE value=""/>
+    <RESDEPEN value="$(RESFILES)"/>
+    <LIBFILES value="..\..\..\zlib\zlib.lib"/>
+    <LIBRARIES value=""/>
+    <PACKAGES value=""/>
+    <PATHCPP value=".;..\.."/>
+    <PATHPAS value=".;"/>
+    <PATHRC value=".;"/>
+    <PATHASM value=".;"/>
+    <LINKER value="TLib"/>
+    <USERDEFINES value=""/>
+    <SYSDEFINES value="_RTLDLL;NO_STRICT"/>
+    <MAINSOURCE value="libpngstat.bpf"/>
+    <INCLUDEPATH value="..\..;..\..\..\zlib;$(BCB)\include"/>
+    <LIBPATH value="..\..;$(BCB)\lib\obj;$(BCB)\lib"/>
+    <WARNINGS value="-w-par"/>
+    <LISTFILE value=""/>
+  </MACROS>
+  <OPTIONS>
+    <CFLAG1 value="-O2 -w -Vx -Ve -X- -a8 -5 -b- -d -k- -vi -c -tW -tWM"/>
+    <PFLAGS value="-$Y- -$L- -$D- -$C- -v -JPHNE -M"/>
+    <AFLAGS value="/mx /w2 /zn"/>
+    <LFLAGS value=""/>
+  </OPTIONS>
+  <LINKER>
+    <ALLOBJ value="$(OBJFILES)"/>
+    <ALLLIB value=""/>
+  </LINKER>
+  <IDEOPTIONS>
+[Version Info]
+IncludeVerInfo=0
+AutoIncBuild=0
+MajorVer=1
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+
+[HistoryLists\hlIncludePath]
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+[Language]
+ActiveLang=
+ProjectLang=
+RootDir=
+  </IDEOPTIONS>
 </PROJECT>

projects/visualc6/README.txt

@@ -31,11 +31,11 @@ To use:
 
 This project builds the libpng binaries as follows:
 
-* Win32_DLL_Release\libpng13.dll      DLL build
-* Win32_DLL_Debug\libpng13d.dll       DLL build (debug version)
-* Win32_DLL_ASM_Release\libpng13.dll  DLL build using ASM code
-* Win32_DLL_ASM_Debug\libpng13d.dll   DLL build using ASM (debug version)
-* Win32_DLL_VB\libpng13vb.dll         DLL build for Visual Basic, using stdcall
+* Win32_DLL_Release\libpng10.dll      DLL build
+* Win32_DLL_Debug\libpng10d.dll       DLL build (debug version)
+* Win32_DLL_ASM_Release\libpng10.dll  DLL build using ASM code
+* Win32_DLL_ASM_Debug\libpng10d.dll   DLL build using ASM (debug version)
+* Win32_DLL_VB\libpng10vb.dll         DLL build for Visual Basic, using stdcall
 * Win32_LIB_Release\libpng.lib        static build
 * Win32_LIB_Debug\libpngd.lib         static build (debug version)
 * Win32_LIB_ASM_Release\libpng.lib    static build using ASM code

projects/visualc6/libpng.dsp

@@ -1,507 +1,472 @@
-# Microsoft Developer Studio Project File - Name="libpng" - Package Owner=<4>
-# Microsoft Developer Studio Generated Build File, Format Version 6.00
-# ** DO NOT EDIT **
-
-# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102
-# TARGTYPE "Win32 (x86) Static Library" 0x0104
-
-CFG=libpng - Win32 DLL Release
-!MESSAGE This is not a valid makefile. To build this project using NMAKE,
-!MESSAGE use the Export Makefile command and run
-!MESSAGE
-!MESSAGE NMAKE /f "libpng.mak".
-!MESSAGE
-!MESSAGE You can specify a configuration when running NMAKE
-!MESSAGE by defining the macro CFG on the command line. For example:
-!MESSAGE
-!MESSAGE NMAKE /f "libpng.mak" CFG="libpng - Win32 DLL Release"
-!MESSAGE
-!MESSAGE Possible choices for configuration are:
-!MESSAGE
-!MESSAGE "libpng - Win32 DLL Release" (based on "Win32 (x86) Dynamic-Link Library")
-!MESSAGE "libpng - Win32 DLL Debug" (based on "Win32 (x86) Dynamic-Link Library")
-!MESSAGE "libpng - Win32 DLL ASM Release" (based on "Win32 (x86) Dynamic-Link Library")
-!MESSAGE "libpng - Win32 DLL ASM Debug" (based on "Win32 (x86) Dynamic-Link Library")
-!MESSAGE "libpng - Win32 DLL VB" (based on "Win32 (x86) Dynamic-Link Library")
-!MESSAGE "libpng - Win32 LIB Release" (based on "Win32 (x86) Static Library")
-!MESSAGE "libpng - Win32 LIB Debug" (based on "Win32 (x86) Static Library")
-!MESSAGE "libpng - Win32 LIB ASM Release" (based on "Win32 (x86) Static Library")
-!MESSAGE "libpng - Win32 LIB ASM Debug" (based on "Win32 (x86) Static Library")
-!MESSAGE
-
-# Begin Project
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+# SUBTRACT CPP /YX /Yc /Yu
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+!ELSEIF  "$(CFG)" == "libpng - Win32 LIB ASM Debug"
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+# PROP BASE Use_MFC 0
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+# SUBTRACT CPP /YX /Yc /Yu
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+!IF  "$(CFG)" == "libpng - Win32 DLL Release"
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+!IF  "$(CFG)" == "libpng - Win32 DLL Release"
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+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL ASM Debug"
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+# PROP Exclude_From_Build 1
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+!ELSEIF  "$(CFG)" == "libpng - Win32 LIB Debug"
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+# PROP Exclude_From_Build 1
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+!ELSEIF  "$(CFG)" == "libpng - Win32 LIB ASM Release"
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+# PROP Exclude_From_Build 1
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+!ELSEIF  "$(CFG)" == "libpng - Win32 LIB ASM Debug"
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+!ENDIF
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+# End Source File
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projects/visualc6/libpng.dsw

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projects/visualc6/pngtest.dsp

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-!ELSEIF  "$(CFG)" == "pngtest - Win32 LIB ASM Release"
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+CFG=pngtest - Win32 DLL Release
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
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+!MESSAGE 
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+# Begin Project
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+!IF  "$(CFG)" == "pngtest - Win32 DLL Release"
+
+# PROP BASE Use_MFC 0
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+!ELSEIF  "$(CFG)" == "pngtest - Win32 DLL ASM Release"
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+
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+!ELSEIF  "$(CFG)" == "pngtest - Win32 LIB Debug"
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+# Begin Special Build Tool
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+
+!ELSEIF  "$(CFG)" == "pngtest - Win32 LIB ASM Release"
+
+# PROP BASE Use_MFC 0
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+# ADD LINK32 Win32_LIB_ASM_Release\libpng.lib ..\..\..\zlib\projects\visualc6\Win32_LIB_ASM_Release\zlib.lib /nologo /subsystem:console /machine:I386
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+
+!ELSEIF  "$(CFG)" == "pngtest - Win32 LIB ASM Debug"
+
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+# Begin Special Build Tool
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+PostBuild_Desc=[Run Test]
+PostBuild_Cmds=$(outdir)\pngtest.exe ..\..\pngtest.png
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+
+!ENDIF 
+
+# Begin Target
+
+# Name "pngtest - Win32 DLL Release"
+# Name "pngtest - Win32 DLL Debug"
+# Name "pngtest - Win32 DLL ASM Release"
+# Name "pngtest - Win32 DLL ASM Debug"
+# Name "pngtest - Win32 LIB Release"
+# Name "pngtest - Win32 LIB Debug"
+# Name "pngtest - Win32 LIB ASM Release"
+# Name "pngtest - Win32 LIB ASM Debug"
+# Begin Group "Source Files"
+
+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
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+
+SOURCE=..\..\pngtest.c
+# End Source File
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+# End Project

projects/visualc71/README.txt

@@ -32,11 +32,11 @@ To use:
 
 This project builds the libpng binaries as follows:
 
-* Win32_DLL_Release\libpng13.dll      DLL build
-* Win32_DLL_Debug\libpng13d.dll       DLL build (debug version)
-* Win32_DLL_ASM_Release\libpng13.dll  DLL build using ASM code
-* Win32_DLL_ASM_Debug\libpng13d.dll   DLL build using ASM (debug version)
-* Win32_DLL_VB\libpng13vb.dll         DLL build for Visual Basic, using stdcall
+* Win32_DLL_Release\libpng10.dll      DLL build
+* Win32_DLL_Debug\libpng10d.dll       DLL build (debug version)
+* Win32_DLL_ASM_Release\libpng10.dll  DLL build using ASM code
+* Win32_DLL_ASM_Debug\libpng10d.dll   DLL build using ASM (debug version)
+* Win32_DLL_VB\libpng10vb.dll         DLL build for Visual Basic, using stdcall
 * Win32_LIB_Release\libpng.lib        static build
 * Win32_LIB_Debug\libpngd.lib         static build (debug version)
 * Win32_LIB_ASM_Release\libpng.lib    static build using ASM code

projects/visualc71/libpng.sln

@@ -1,88 +1,88 @@
-Microsoft Visual Studio Solution File, Format Version 8.00
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libpng", "libpng.vcproj", "{0008960E-E0DD-41A6-8265-00B31DDB4C21}"
-	ProjectSection(ProjectDependencies) = postProject
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0} = {2D4F8105-7D21-454C-9932-B47CAB71A5C0}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pngtest", "pngtest.vcproj", "{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}"
-	ProjectSection(ProjectDependencies) = postProject
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21} = {0008960E-E0DD-41A6-8265-00B31DDB4C21}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlib", "zlib.vcproj", "{2D4F8105-7D21-454C-9932-B47CAB71A5C0}"
-	ProjectSection(ProjectDependencies) = postProject
-	EndProjectSection
-EndProject
-Global
-	GlobalSection(SolutionConfiguration) = preSolution
-		DLL ASM Debug = DLL ASM Debug
-		DLL ASM Release = DLL ASM Release
-		DLL Debug = DLL Debug
-		DLL Release = DLL Release
-		DLL VB = DLL VB
-		LIB ASM Debug = LIB ASM Debug
-		LIB ASM Release = LIB ASM Release
-		LIB Debug = LIB Debug
-		LIB Release = LIB Release
-	EndGlobalSection
-	GlobalSection(ProjectConfiguration) = postSolution
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL ASM Debug.ActiveCfg = DLL ASM Debug|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL ASM Debug.Build.0 = DLL ASM Debug|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL ASM Release.ActiveCfg = DLL ASM Release|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL ASM Release.Build.0 = DLL ASM Release|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL Debug.ActiveCfg = DLL Debug|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL Debug.Build.0 = DLL Debug|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL Release.ActiveCfg = DLL Release|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL Release.Build.0 = DLL Release|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL VB.ActiveCfg = DLL VB|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL VB.Build.0 = DLL VB|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB ASM Debug.ActiveCfg = LIB ASM Debug|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB ASM Debug.Build.0 = LIB ASM Debug|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB ASM Release.ActiveCfg = LIB ASM Release|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB ASM Release.Build.0 = LIB ASM Release|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB Debug.ActiveCfg = LIB Debug|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB Debug.Build.0 = LIB Debug|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB Release.ActiveCfg = LIB Release|Win32
-		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB Release.Build.0 = LIB Release|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL ASM Debug.ActiveCfg = DLL ASM Debug|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL ASM Debug.Build.0 = DLL ASM Debug|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL ASM Release.ActiveCfg = DLL ASM Release|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL ASM Release.Build.0 = DLL ASM Release|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL Debug.ActiveCfg = DLL Debug|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL Debug.Build.0 = DLL Debug|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL Release.ActiveCfg = DLL Release|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL Release.Build.0 = DLL Release|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL VB.ActiveCfg = DLL VB|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL VB.Build.0 = DLL VB|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB ASM Debug.ActiveCfg = LIB ASM Debug|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB ASM Debug.Build.0 = LIB ASM Debug|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB ASM Release.ActiveCfg = LIB ASM Release|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB ASM Release.Build.0 = LIB ASM Release|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB Debug.ActiveCfg = LIB Debug|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB Debug.Build.0 = LIB Debug|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB Release.ActiveCfg = LIB Release|Win32
-		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB Release.Build.0 = LIB Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL ASM Debug.ActiveCfg = DLL ASM Debug|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL ASM Debug.Build.0 = DLL ASM Debug|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL ASM Release.ActiveCfg = DLL ASM Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL ASM Release.Build.0 = DLL ASM Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL Debug.ActiveCfg = DLL Debug|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL Debug.Build.0 = DLL Debug|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL Release.ActiveCfg = DLL Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL Release.Build.0 = DLL Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL VB.ActiveCfg = DLL Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL VB.Build.0 = DLL Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB ASM Debug.ActiveCfg = LIB ASM Debug|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB ASM Debug.Build.0 = LIB ASM Debug|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB ASM Release.ActiveCfg = LIB ASM Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB ASM Release.Build.0 = LIB ASM Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB Debug.ActiveCfg = LIB Debug|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB Debug.Build.0 = LIB Debug|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB Release.ActiveCfg = LIB Release|Win32
-		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB Release.Build.0 = LIB Release|Win32
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-	EndGlobalSection
-	GlobalSection(ExtensibilityAddIns) = postSolution
-	EndGlobalSection
-EndGlobal
+Microsoft Visual Studio Solution File, Format Version 8.00
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libpng", "libpng.vcproj", "{0008960E-E0DD-41A6-8265-00B31DDB4C21}"
+	ProjectSection(ProjectDependencies) = postProject
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0} = {2D4F8105-7D21-454C-9932-B47CAB71A5C0}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pngtest", "pngtest.vcproj", "{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}"
+	ProjectSection(ProjectDependencies) = postProject
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21} = {0008960E-E0DD-41A6-8265-00B31DDB4C21}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlib", "zlib.vcproj", "{2D4F8105-7D21-454C-9932-B47CAB71A5C0}"
+	ProjectSection(ProjectDependencies) = postProject
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfiguration) = preSolution
+		DLL ASM Debug = DLL ASM Debug
+		DLL ASM Release = DLL ASM Release
+		DLL Debug = DLL Debug
+		DLL Release = DLL Release
+		DLL VB = DLL VB
+		LIB ASM Debug = LIB ASM Debug
+		LIB ASM Release = LIB ASM Release
+		LIB Debug = LIB Debug
+		LIB Release = LIB Release
+	EndGlobalSection
+	GlobalSection(ProjectConfiguration) = postSolution
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL ASM Debug.ActiveCfg = DLL ASM Debug|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL ASM Debug.Build.0 = DLL ASM Debug|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL ASM Release.ActiveCfg = DLL ASM Release|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL ASM Release.Build.0 = DLL ASM Release|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL Debug.ActiveCfg = DLL Debug|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL Debug.Build.0 = DLL Debug|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL Release.ActiveCfg = DLL Release|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL Release.Build.0 = DLL Release|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL VB.ActiveCfg = DLL VB|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.DLL VB.Build.0 = DLL VB|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB ASM Debug.ActiveCfg = LIB ASM Debug|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB ASM Debug.Build.0 = LIB ASM Debug|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB ASM Release.ActiveCfg = LIB ASM Release|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB ASM Release.Build.0 = LIB ASM Release|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB Debug.ActiveCfg = LIB Debug|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB Debug.Build.0 = LIB Debug|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB Release.ActiveCfg = LIB Release|Win32
+		{0008960E-E0DD-41A6-8265-00B31DDB4C21}.LIB Release.Build.0 = LIB Release|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL ASM Debug.ActiveCfg = DLL ASM Debug|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL ASM Debug.Build.0 = DLL ASM Debug|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL ASM Release.ActiveCfg = DLL ASM Release|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL ASM Release.Build.0 = DLL ASM Release|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL Debug.ActiveCfg = DLL Debug|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL Debug.Build.0 = DLL Debug|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL Release.ActiveCfg = DLL Release|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL Release.Build.0 = DLL Release|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL VB.ActiveCfg = DLL VB|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.DLL VB.Build.0 = DLL VB|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB ASM Debug.ActiveCfg = LIB ASM Debug|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB ASM Debug.Build.0 = LIB ASM Debug|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB ASM Release.ActiveCfg = LIB ASM Release|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB ASM Release.Build.0 = LIB ASM Release|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB Debug.ActiveCfg = LIB Debug|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB Debug.Build.0 = LIB Debug|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB Release.ActiveCfg = LIB Release|Win32
+		{FD1C2F86-9EEF-47BD-95A4-530917E17FDA}.LIB Release.Build.0 = LIB Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL ASM Debug.ActiveCfg = DLL ASM Debug|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL ASM Debug.Build.0 = DLL ASM Debug|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL ASM Release.ActiveCfg = DLL ASM Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL ASM Release.Build.0 = DLL ASM Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL Debug.ActiveCfg = DLL Debug|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL Debug.Build.0 = DLL Debug|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL Release.ActiveCfg = DLL Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL Release.Build.0 = DLL Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL VB.ActiveCfg = DLL Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.DLL VB.Build.0 = DLL Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB ASM Debug.ActiveCfg = LIB ASM Debug|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB ASM Debug.Build.0 = LIB ASM Debug|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB ASM Release.ActiveCfg = LIB ASM Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB ASM Release.Build.0 = LIB ASM Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB Debug.ActiveCfg = LIB Debug|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB Debug.Build.0 = LIB Debug|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB Release.ActiveCfg = LIB Release|Win32
+		{2D4F8105-7D21-454C-9932-B47CAB71A5C0}.LIB Release.Build.0 = LIB Release|Win32
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+	EndGlobalSection
+	GlobalSection(ExtensibilityAddIns) = postSolution
+	EndGlobalSection
+EndGlobal

projects/visualc71/pngtest.vcproj

@@ -1,459 +1,459 @@
-<?xml version="1.0" encoding="Windows-1252"?>
-<VisualStudioProject
-	ProjectType="Visual C++"
-	Version="7.10"
-	Name="pngtest"
-	RootNamespace="pngtest">
-	<Platforms>
-		<Platform
-			Name="Win32"/>
-	</Platforms>
-	<Configurations>
-		<Configuration
-			Name="DLL Release|Win32"
-			OutputDirectory=".\Win32_DLL_Release\Test"
-			IntermediateDirectory=".\Win32_DLL_Release\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				InlineFunctionExpansion="1"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;NDEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS"
-				StringPooling="TRUE"
-				RuntimeLibrary="2"
-				EnableFunctionLevelLinking="TRUE"
-				WarningLevel="3"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				LinkIncremental="1"
-				SubSystem="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="DLL Debug|Win32"
-			OutputDirectory=".\Win32_DLL_Debug\Test"
-			IntermediateDirectory=".\Win32_DLL_Debug\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				Optimization="0"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;_DEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS"
-				BasicRuntimeChecks="3"
-				RuntimeLibrary="3"
-				WarningLevel="3"
-				DebugInformationFormat="4"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				GenerateDebugInformation="TRUE"
-				SubSystem="1"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="DLL ASM Release|Win32"
-			OutputDirectory=".\Win32_DLL_ASM_Release\Test"
-			IntermediateDirectory=".\Win32_DLL_ASM_Release\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				InlineFunctionExpansion="1"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;NDEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS"
-				StringPooling="TRUE"
-				RuntimeLibrary="2"
-				EnableFunctionLevelLinking="TRUE"
-				WarningLevel="3"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				LinkIncremental="1"
-				SubSystem="1"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="DLL ASM Debug|Win32"
-			OutputDirectory=".\Win32_DLL_ASM_Debug\Test"
-			IntermediateDirectory=".\Win32_DLL_ASM_Debug\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				Optimization="0"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;_DEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS"
-				BasicRuntimeChecks="3"
-				RuntimeLibrary="3"
-				WarningLevel="3"
-				DebugInformationFormat="4"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				GenerateDebugInformation="TRUE"
-				SubSystem="1"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="DLL VB|Win32"
-			OutputDirectory=".\Win32_DLL_VB\Test"
-			IntermediateDirectory=".\Win32_DLL_VB\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				InlineFunctionExpansion="1"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;NDEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS;PNGAPI=__stdcall"
-				StringPooling="TRUE"
-				RuntimeLibrary="2"
-				EnableFunctionLevelLinking="TRUE"
-				WarningLevel="2"
-				CallingConvention="2"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\..\Win32_DLL_Release\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				LinkIncremental="1"
-				IgnoreDefaultLibraryNames="$(IntDir)\libpng13vb.lib"
-				SubSystem="1"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="LIB Release|Win32"
-			OutputDirectory=".\Win32_LIB_Release\Test"
-			IntermediateDirectory=".\Win32_LIB_Release\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				InlineFunctionExpansion="1"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;_DEBUG;PNG_NO_GLOBAL_ARRAYS"
-				StringPooling="TRUE"
-				RuntimeLibrary="2"
-				EnableFunctionLevelLinking="TRUE"
-				WarningLevel="3"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				LinkIncremental="1"
-				SubSystem="1"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="LIB Debug|Win32"
-			OutputDirectory=".\Win32_LIB_Debug\Test"
-			IntermediateDirectory=".\Win32_LIB_Debug\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				Optimization="0"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;_DEBUG;PNG_NO_GLOBAL_ARRAYS"
-				BasicRuntimeChecks="3"
-				RuntimeLibrary="3"
-				WarningLevel="3"
-				DebugInformationFormat="4"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				GenerateDebugInformation="TRUE"
-				SubSystem="1"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="LIB ASM Release|Win32"
-			OutputDirectory=".\Win32_LIB_ASM_Release\Test"
-			IntermediateDirectory=".\Win32_LIB_ASM_Release\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				InlineFunctionExpansion="1"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;NDEBUG;PNG_NO_GLOBAL_ARRAYS"
-				StringPooling="TRUE"
-				RuntimeLibrary="2"
-				EnableFunctionLevelLinking="TRUE"
-				WarningLevel="3"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				LinkIncremental="1"
-				SubSystem="1"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="LIB ASM Debug|Win32"
-			OutputDirectory=".\Win32_LIB_ASM_Debug\Test"
-			IntermediateDirectory=".\Win32_LIB_ASM_Debug\Test"
-			ConfigurationType="1">
-			<Tool
-				Name="VCCLCompilerTool"
-				Optimization="0"
-				AdditionalIncludeDirectories="..\..\..\zlib"
-				PreprocessorDefinitions="WIN32;_DEBUG;PNG_NO_GLOBAL_ARRAYS"
-				BasicRuntimeChecks="3"
-				RuntimeLibrary="3"
-				WarningLevel="3"
-				DebugInformationFormat="4"
-				CompileAs="0"/>
-			<Tool
-				Name="VCCustomBuildTool"
-				Description="Testing..."
-				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
-$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
-				Outputs="$(IntDir)\pngout.png"/>
-			<Tool
-				Name="VCLinkerTool"
-				OutputFile="$(OutDir)/pngtest.exe"
-				GenerateDebugInformation="TRUE"
-				SubSystem="1"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-	</Configurations>
-	<References>
-	</References>
-	<Files>
-		<Filter
-			Name="Source Files"
-			Filter="cpp;c;cxx;rc;def;r;odl;idl;hpj;bat">
-			<File
-				RelativePath="..\..\pngtest.c">
-			</File>
-		</Filter>
-	</Files>
-	<Globals>
-	</Globals>
-</VisualStudioProject>
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="7.10"
+	Name="pngtest"
+	RootNamespace="pngtest">
+	<Platforms>
+		<Platform
+			Name="Win32"/>
+	</Platforms>
+	<Configurations>
+		<Configuration
+			Name="DLL Release|Win32"
+			OutputDirectory=".\Win32_DLL_Release\Test"
+			IntermediateDirectory=".\Win32_DLL_Release\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				InlineFunctionExpansion="1"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;NDEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS"
+				StringPooling="TRUE"
+				RuntimeLibrary="2"
+				EnableFunctionLevelLinking="TRUE"
+				WarningLevel="3"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				LinkIncremental="1"
+				SubSystem="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+		<Configuration
+			Name="DLL Debug|Win32"
+			OutputDirectory=".\Win32_DLL_Debug\Test"
+			IntermediateDirectory=".\Win32_DLL_Debug\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;_DEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS"
+				BasicRuntimeChecks="3"
+				RuntimeLibrary="3"
+				WarningLevel="3"
+				DebugInformationFormat="4"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				GenerateDebugInformation="TRUE"
+				SubSystem="1"
+				TargetMachine="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+		<Configuration
+			Name="DLL ASM Release|Win32"
+			OutputDirectory=".\Win32_DLL_ASM_Release\Test"
+			IntermediateDirectory=".\Win32_DLL_ASM_Release\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				InlineFunctionExpansion="1"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;NDEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS"
+				StringPooling="TRUE"
+				RuntimeLibrary="2"
+				EnableFunctionLevelLinking="TRUE"
+				WarningLevel="3"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				LinkIncremental="1"
+				SubSystem="1"
+				TargetMachine="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+		<Configuration
+			Name="DLL ASM Debug|Win32"
+			OutputDirectory=".\Win32_DLL_ASM_Debug\Test"
+			IntermediateDirectory=".\Win32_DLL_ASM_Debug\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;_DEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS"
+				BasicRuntimeChecks="3"
+				RuntimeLibrary="3"
+				WarningLevel="3"
+				DebugInformationFormat="4"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				GenerateDebugInformation="TRUE"
+				SubSystem="1"
+				TargetMachine="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+		<Configuration
+			Name="DLL VB|Win32"
+			OutputDirectory=".\Win32_DLL_VB\Test"
+			IntermediateDirectory=".\Win32_DLL_VB\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				InlineFunctionExpansion="1"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;NDEBUG;PNG_DLL;PNG_NO_STDIO;PNG_NO_GLOBAL_ARRAYS;PNGAPI=__stdcall"
+				StringPooling="TRUE"
+				RuntimeLibrary="2"
+				EnableFunctionLevelLinking="TRUE"
+				WarningLevel="2"
+				CallingConvention="2"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\..\Win32_DLL_Release\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				LinkIncremental="1"
+				IgnoreDefaultLibraryNames="$(IntDir)\libpng10vb.lib"
+				SubSystem="1"
+				TargetMachine="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+		<Configuration
+			Name="LIB Release|Win32"
+			OutputDirectory=".\Win32_LIB_Release\Test"
+			IntermediateDirectory=".\Win32_LIB_Release\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				InlineFunctionExpansion="1"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;_DEBUG;PNG_NO_GLOBAL_ARRAYS"
+				StringPooling="TRUE"
+				RuntimeLibrary="2"
+				EnableFunctionLevelLinking="TRUE"
+				WarningLevel="3"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				LinkIncremental="1"
+				SubSystem="1"
+				TargetMachine="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+		<Configuration
+			Name="LIB Debug|Win32"
+			OutputDirectory=".\Win32_LIB_Debug\Test"
+			IntermediateDirectory=".\Win32_LIB_Debug\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;_DEBUG;PNG_NO_GLOBAL_ARRAYS"
+				BasicRuntimeChecks="3"
+				RuntimeLibrary="3"
+				WarningLevel="3"
+				DebugInformationFormat="4"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				GenerateDebugInformation="TRUE"
+				SubSystem="1"
+				TargetMachine="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+		<Configuration
+			Name="LIB ASM Release|Win32"
+			OutputDirectory=".\Win32_LIB_ASM_Release\Test"
+			IntermediateDirectory=".\Win32_LIB_ASM_Release\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				InlineFunctionExpansion="1"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;NDEBUG;PNG_NO_GLOBAL_ARRAYS"
+				StringPooling="TRUE"
+				RuntimeLibrary="2"
+				EnableFunctionLevelLinking="TRUE"
+				WarningLevel="3"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				LinkIncremental="1"
+				SubSystem="1"
+				TargetMachine="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+		<Configuration
+			Name="LIB ASM Debug|Win32"
+			OutputDirectory=".\Win32_LIB_ASM_Debug\Test"
+			IntermediateDirectory=".\Win32_LIB_ASM_Debug\Test"
+			ConfigurationType="1">
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				AdditionalIncludeDirectories="..\..\..\zlib"
+				PreprocessorDefinitions="WIN32;_DEBUG;PNG_NO_GLOBAL_ARRAYS"
+				BasicRuntimeChecks="3"
+				RuntimeLibrary="3"
+				WarningLevel="3"
+				DebugInformationFormat="4"
+				CompileAs="0"/>
+			<Tool
+				Name="VCCustomBuildTool"
+				Description="Testing..."
+				CommandLine="set path=$(OutDir)\..;$(OutDir)\..\ZLib
+$(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png"
+				Outputs="$(IntDir)\pngout.png"/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(OutDir)/pngtest.exe"
+				GenerateDebugInformation="TRUE"
+				SubSystem="1"
+				TargetMachine="1"/>
+			<Tool
+				Name="VCMIDLTool"/>
+			<Tool
+				Name="VCPostBuildEventTool"/>
+			<Tool
+				Name="VCPreBuildEventTool"/>
+			<Tool
+				Name="VCPreLinkEventTool"/>
+			<Tool
+				Name="VCResourceCompilerTool"/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"/>
+			<Tool
+				Name="VCWebDeploymentTool"/>
+			<Tool
+				Name="VCManagedWrapperGeneratorTool"/>
+			<Tool
+				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<Filter
+			Name="Source Files"
+			Filter="cpp;c;cxx;rc;def;r;odl;idl;hpj;bat">
+			<File
+				RelativePath="..\..\pngtest.c">
+			</File>
+		</Filter>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>