Libpng 1.0.27rc2 - August 4, 2007 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. Files available for download: Source files with LF line endings (for Unix/Linux) and with a "configure" script libpng-1.0.27rc2.tar.gz libpng-1.0.27rc2.tar.bz2 Source files with LF line endings (for Unix/Linux) without the "configure" script libpng-1.0.27rc2-no-config.tar.gz libpng-1.0.27rc2-no-config.tar.bz2 Source files with CRLF line endings (for Windows), without the "configure" script lp1027r02.zip lp1027r02.tar.bz2 Project files libpng-1.0.27rc2-project-netware.zip libpng-1.0.27rc2-project-wince.zip Other information: libpng-1.0.27rc2-README.txt libpng-1.0.27rc2-KNOWNBUGS.txt libpng-1.0.27rc2-LICENSE.txt libpng-1.0.27rc2-Y2K-compliance.txt Changes since the last public release (1.0.26): version 1.2.19beta1 [May 18, 2007] Changed "const static" to "static PNG_CONST" everywhere, mostly undoing change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST" version 1.2.19beta2 [May 18, 2007] Fixed png_do_expand() to only use the appropriate bits of tRNS value. version 1.2.19beta3 [May 20, 2007] Add some "png_byte" typecasts in png_check_keyword(). Write new_key instead of key in zTXt chunk. version 1.2.19beta4 [May 21, 2007] Add png_snprintf() function and use it in place of sprint() for improved defense against buffer overflows. version 1.2.19beta5 [May 21, 2007] Fixed png_handle_tRNS() to only use the appropriate bits of tRNS value. Changed handling of more unused parameters, to avoid compiler warnings. Removed some PNG_CONST in pngwutil.c to avoid compiler warnings. version 1.2.19beta6 [May 22, 2007] Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c Added a special "_MSC_VER" case that defines png_snprintf to _snprintf version 1.2.19beta7 [May 22, 2007] Squelched png_squelch_warnings() in pnggccrd.c and added an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused the warnings that png_squelch_warnings was squelching. version 1.2.19beta8 [May 22, 2007] Removed __MMX__ from test in pngconf.h. version 1.2.19beta9 [May 23, 2007] Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro. Revised png_squelch_warnings() so it might work. Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86. version 1.2.19beta10 [May 24, 2007] Resquelched png_squelch_warnings(), use "__attribute__((used))" instead. version 1.2.19beta11 [May 28, 2007] Return 0 from png_get_sPLT() and png_get_unknown_chunks() if png_ptr is NULL; changed three remaining instances of png_strcpy() to png_strncpy() (David Hill). Make test for NULL row_buf at the beginning of png_do_read_transformations unconditional. version 1.2.19beta12 [May 28, 2007] Revised pnggccrd.c. version 1.2.19beta13 [June 14, 2007] Prefer PNG_USE_PNGVCRD when _MSC_VER is defined in pngconf.h version 1.2.19beta14 [June 16, 2007] Fix bug with handling of 16-bit transparency, introduced in 1.2.19beta2 version 1.2.19beta15 [June 17, 2007] Revised pnggccrd.c. version 1.2.19beta16 [June 18, 2007] Revised pnggccrd.c again. Updated contrib/gregbook. Changed '#include "pnggccrd.c"' to 'include "$srcdir/pnggccrd.c"' in configure.ac version 1.2.19beta17 [June 19, 2007] Revised many of the makefiles, to set -DPNG_NO_MMX_CODE where needed and to not use -O3 unless -DPNG_NO_MMX_CODE is also set. version 1.2.19beta18 [June 23, 2007] Replaced some C++ style comments with C style comments in pnggccrd.c. Copied optimized C code from pnggccrd.c to pngrutil.c, removed dependency on pnggccrd.o from many makefiles. Added sl and dylib to list of extensions be installed by Makefile.am version 1.2.19beta19 [June 28, 2007] Fixed testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN in pngrtran.c More cleanup of pnggccrd.c and pngvcrd.c version 1.2.19beta20 [June 29, 2007] Rebuilt Makefile.in and configure using libtool-1.5.24. Fixed typo in pnggccrd.c version 1.2.19beta21 [June 30, 2007] More revision of pnggccrd.c Added "test" target to Makefile.in and Makefile.am version 1.2.19beta22 [July 3, 2007] Added info about pngrutil/pnggccrd/pngvcrd to png_get_header_version() Fix type definition of dummy_value_a, b in pnggccrd.c version 1.2.19beta23 [July 10, 2007] Revert change to type definition of dummy_value_a, b in pnggccrd.c Make sure __PIC__ is defined in pnggccrd.c when PIC is defined. Make PNG_NO_MMX_CODE the default on x86_64 GNUC platforms. version 1.2.19beta24 [July 14, 2007] Added PNG_NO_READ_FILTER, PNG_NO_WRITE_FILTER, PNG_NO_WARNING macros. Added contrib/pngminim to demonstrate building minimal encoder and decoder version 1.2.19beta25 [July 15, 2007] Removed the new PNG_NO_READ_FILTER macro since it would make the library unable to read valid PNG files, and filtering is at the heart of the PNG format. version 1.2.19beta26 [July 16, 2007] Changed "png_free(str)" to "png_free(png_ptr,str)" in pngrutil.c WinCE code (Yves Piguet). This bug was introduced in libpng-1.2.14. Updated scripts/CMakeLists.txt Relocated a misplaced #endif in pnggccrd.c version 1.2.19beta27 [July 17, 2007] Fixed incorrect stride and number of bytes copied (was 4 instead of 6 bytes) in the cleanup loop of pnggccrd.c and pngvcrd.c for handling the end of 48-bit interlaced rows (Glenn R-P). version 1.2.19beta28 [July 19, 2007] Removed requirement for gcc-4.1 or better to use PNG_HAVE_MMX_FILTER_ROW on x86_64 platforms Added png_warning() in pngrutil.c for short iCCP, iTXt, sPLT, or zTXT chunks. Revised pngtest.c so warnings are displayed regardless of PNG_NO_STDIO. version 1.2.19beta30 [July 26, 2007] Revised pnggccrd.c version 1.2.19beta31 [July 27, 2007] Fix typos in pnggccrd.c version 1.2.19beta32 [August 4, 2007] Disable PNG_MMX_CODE_SUPPORTED when PNG_ASSEMBLER_CODE_SUPPORTED is off. Enable PNG_MMX_READ_FILTER_* by default (they were inadvertently disabled in libpng-1.2.19beta23). Fix some debugging statements in pnggccrd.c and pngrutil.c Added information about disabling the MMX code in libpng documentation. version 1.0.27rc2 and 1.2.19rc2 [August 4, 2007] Removed some "#if 0" blocks. Made a global struct local in pngvcrd.c to make it thread safe. Issue a png_error() if application attempts to transform a row tht has not been initialized. 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