| |
| Libpng 1.5.7beta03 - November 16, 2011 |
| |
| 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 |
| |
| 1.5.7beta03.tar.xz (LZMA-compressed, recommended) |
| 1.5.7beta03.tar.gz |
| 1.5.7beta03.tar.bz2 |
| |
| Source files with CRLF line endings (for Windows), without the |
| "configure" script |
| |
| lp157b03.7z (LZMA-compressed, recommended) |
| lp157b03.zip |
| |
| Other information: |
| |
| 1.5.7beta03-README.txt |
| 1.5.7beta03-LICENSE.txt |
| |
| Changes since the last public release (1.5.6): |
| |
| 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 16, 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. |
| |
| 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 |
