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| Libpng 1.5.7rc03 - December 8, 2011 |
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| 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. |
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| Files available for download: |
| |
| Source files with LF line endings (for Unix/Linux) and with a |
| "configure" script |
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| 1.5.7rc03.tar.xz (LZMA-compressed, recommended) |
| 1.5.7rc03.tar.gz |
| 1.5.7rc03.tar.bz2 |
| |
| Source files with CRLF line endings (for Windows), without the |
| "configure" script |
| |
| lp157r03.7z (LZMA-compressed, recommended) |
| lp157r03.zip |
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| Other information: |
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| 1.5.7rc03-README.txt |
| 1.5.7rc03-LICENSE.txt |
| |
| Changes since the last public release (1.5.6): |
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| Version 1.5.7beta01 [November 4, 2011] |
| Added support for ARM processor (Mans Rullgard) |
| Fixed bug in pngvalid on early allocation failure; fixed type cast in |
| pngmem.c; pngvalid would attempt to call png_error() if the allocation |
| of a png_struct or png_info failed. This would probably have led to a |
| crash. The pngmem.c implementation of png_malloc() included a cast |
| to png_size_t which would fail on large allocations on 16-bit systems. |
| Fix for the preprocessor of the Intel C compiler. The preprocessor |
| splits adjacent @ signs with a space; this changes the concatentation |
| token from @-@-@ to PNG_JOIN; that should work with all compiler |
| preprocessors. |
| Paeth filter speed improvements from work by Siarhei Siamashka. This |
| changes the 'Paeth' reconstruction function to improve the GCC code |
| generation on x86. The changes are only part of the suggested ones; |
| just the changes that definitely improve speed and remain simple. |
| The changes also slightly increase the clarity of the code. |
| |
| Version 1.5.7beta02 [November 11, 2011] |
| Check compression_type parameter in png_get_iCCP and remove spurious |
| casts. The compression_type parameter is always assigned to, so must |
| be non-NULL. The cast of the profile length potentially truncated the |
| value unnecessarily on a 16-bit int system, so the cast of the (byte) |
| compression type to (int) is specified by ANSI-C anyway. |
| Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left |
| the sBIT fields in the test pixel as 0, which resulted in a floating |
| point division by zero which was irrelevant but causes systems where |
| FP exceptions cause a crash. Added code to pngvalid to turn on FP |
| exceptions if the appropriate glibc support is there to ensure this is |
| tested in the future. |
| Updated scripts/pnglibconf.mak and scripts/makefile.std to handle the |
| new PNG_JOIN macro. |
| Added versioning to pnglibconf.h comments. |
| Simplified read/write API initial version; basic read/write tested on |
| a variety of images, limited documentation (in the header file.) |
| Installed more accurate linear to sRGB conversion tables. The slightly |
| modified tables reduce the number of 16-bit values that |
| convert to an off-by-one 8-bit value. The "makesRGB.c" code that was used |
| to generate the tables is now in a contrib/sRGBtables sub-directory. |
| |
| Version 1.5.7beta03 [November 17, 2011] |
| Removed PNG_CONST from the sRGB table declarations in pngpriv.h and png.c |
| Added run-time detection of NEON support. |
| Added contrib/libtests; includes simplified API test and timing test and |
| a color conversion utility for rapid checking of failed 'pngstest' results. |
| Multiple transform bug fixes plus a work-round for double gamma correction. |
| libpng does not support more than one transform that requires linear data |
| at once - if this is tried typically the results is double gamma |
| correction. Since the simplified APIs can need rgb to gray combined with |
| a compose operation it is necessary to do one of these outside the main |
| libpng transform code. This check-in also contains fixes to various bugs |
| in the simplified APIs themselves and to some bugs in compose and rgb to |
| gray (on palette) itself. |
| Fixes for C++ compilation using g++ When libpng source is compiled |
| using g++. The compiler imposes C++ rules on the C source; thus it |
| is desireable to make the source work with either C or C++ rules |
| without throwing away useful error information. This change adds |
| png_voidcast to allow C semantic (void*) cases or the corresponding |
| C++ static_cast operation, as appropriate. |
| Added --noexecstack to assembler file compilation. GCC does not set |
| this on assembler compilation, even though it does on C compilation. |
| This creates security issues if assembler code is enabled; the |
| work-around is to set it by default in the flags for $(CCAS) |
| Work around compilers that don't support declaration of const data. Some |
| compilers fault 'extern const' data declarations (because the data is |
| not initialized); this turns on const-ness only for compilers where |
| this is known to work. |
| |
| Version 1.5.7beta04 [November 17, 2011] |
| Since the gcc driver does not recognize the --noexecstack flag, we must |
| use the -Wa prefix to have it passed through to the assembler. |
| Also removed a duplicate setting of this flag. |
| Added files that were omitted from the libpng-1.5.7beta03 zip distribution. |
| |
| Version 1.5.7beta05 [November 25, 2011] |
| Removed "zTXt" from warning in generic chunk decompression function. |
| Validate time settings passed to pngset() and png_convert_to_rfc1123() |
| (Frank Busse). |
| Added MINGW support to CMakeLists.txt |
| Reject invalid compression flag or method when reading the iTXt chunk. |
| Backed out 'simplified' API changes. The API seems too complex and there |
| is a lack of consensus or enthusiasm for the proposals. The API also |
| reveals significant bugs inside libpng (double gamma correction and the |
| known bug of being unable to retrieve a corrected palette). It seems |
| better to wait until the bugs, at least, are corrected. |
| Moved pngvalid.c into contrib/libtests |
| Rebuilt Makefile.in, configure, etc., with autoconf-2.68 |
| |
| Version 1.5.7rc01 [December 1, 2011] |
| Replaced an "#if" with "#ifdef" in pngrtran.c |
| Revised #if PNG_DO_BC block in png.c (use #ifdef and add #else) |
| |
| Version 1.5.7rc02 [December 5, 2011] |
| Revised project files and contrib/pngvalid/pngvalid.c to account for |
| the relocation of pngvalid into contrib/libtests. |
| Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400, |
| as in libpng-1.5.4. |
| Put CRLF line endings in the owatcom project files. |
| |
| Version 1.5.7rc03 [December 8, 2011] |
| Updated CMakeLists.txt to account for the relocation of pngvalid.c |
| |
| 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 |