| |
| Libpng 1.5.3beta07 - May 9, 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 |
| |
| 1.5.3beta07.tar.xz (LZMA-compressed, recommended) |
| 1.5.3beta07.tar.gz |
| 1.5.3beta07.tar.bz2 |
| |
| Source files with CRLF line endings (for Windows), without the |
| "configure" script |
| |
| lp153b07.7z (LZMA-compressed, recommended) |
| lp153b07.zip |
| |
| Other information: |
| |
| 1.5.3beta07-README.txt |
| 1.5.3beta07-LICENSE.txt |
| |
| Changes since the last public release (1.5.2): |
| |
| Version 1.5.3beta01 [April 1, 2011] |
| Re-initialize the zlib compressor before compressing non-IDAT chunks. |
| Added API functions to set parameters for zlib compression of non-IDAT |
| chunks. |
| |
| Version 1.5.3beta02 [April 3, 2011] |
| Updated scripts/symbols.def with new API functions. |
| Only compile the new zlib re-initializing code when text or iCCP is |
| supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro. |
| Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03). |
| Optimize the zlib CMF byte in non-IDAT compressed chunks |
| |
| Version 1.5.3beta03 [April 16, 2011] |
| Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have |
| snprintf, and the "__STRICT_ANSI__" detects that condition more reliably |
| than __STDC__ (John Bowler). |
| Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells |
| the compiler that a user supplied callback (the error handler) does not |
| return, yet there is no guarantee in practice that the application code |
| will correctly implement the error handler because the compiler only |
| issues a warning if there is a mistake (John Bowler). |
| Removed the no-longer-used PNG_DEPSTRUCT macro. |
| Updated the zlib version to 1.2.5 in the VStudio project. |
| Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in |
| pngwutil.c (John Bowler). |
| Fixed bug with stripping the filler or alpha channel when writing, that |
| was introduced in libpng-1.5.2beta01 (bug report by Andrew Church). |
| |
| Version 1.5.3beta04 [April 27, 2011] |
| Updated pngtest.png with the new zlib CMF optimization. |
| Cleaned up conditional compilation code and of background/gamma handling |
| Internal changes only except a new option to avoid compiling the |
| png_build_grayscale_palette API (which is not used at all internally.) |
| The main change is to move the transform tests (READ_TRANSFORMS, |
| WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids |
| calls to spurious functions if all transforms are disabled and slightly |
| simplifies those functions. Pngvalid modified to handle this. |
| A minor change is to stop the strip_16 and expand_16 interfaces from |
| disabling each other; this allows the future alpha premultiplication |
| code to use 16-bit intermediate values while still producing 8-bit output. |
| png_do_background and png_do_gamma have been simplified to take a single |
| pointer to the png_struct rather than pointers to every item required |
| from the png_struct. This makes no practical difference to the internal |
| code. |
| A serious bug in the pngvalid internal routine 'standard_display_init' has |
| been fixed - this failed to initialize the red channel and accidentally |
| initialized the alpha channel twice. |
| Changed png_struct jmp_buf member name from png_jmpbuf to tmp_jmpbuf to |
| avoid a clash with the png_jmpbuf macro on some platforms. |
| |
| Version 1.5.3beta05 [May 6, 2011] |
| Added appropriate feature test macros to ensure libpng sees the correct API |
| _POSIX_SOURCE is defined in pngpriv.h, pngtest.c and pngvalid.c to ensure |
| that POSIX conformant systems disable non-POSIX APIs. _ISOC99_SOURCE is |
| defined in pngpriv.h to obtain the ISO C99 snprintf definition, when |
| available. |
| Removed png_snprintf and added formatted warning messages. This change adds |
| internal APIs to allow png_warning messages to have parameters without |
| requiring the host OS to implement snprintf. As a side effect the |
| dependency of the tIME-supporting RFC1132 code on stdio is removed and |
| PNG_NO_WARNINGS does actually work now. |
| Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte |
| optimization configureable. |
| IDAT compression failed if preceded by a compressed text chunk (bug |
| introduced in libpng-1.5.3beta01-02). This was because the attempt to |
| reset the zlib stream in png_write_IDAT happened after the first IDAT |
| chunk had been deflated - much too late. In this change internal |
| functions were added to claim/release the z_stream and, hopefully, make |
| the code more robust. Also deflateEnd checking is added - previously |
| libpng would ignore an error at the end of the stream. |
| |
| Version 1.5.3beta06 [May 8, 2011] |
| Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt |
| Implemented premultiplied alpha support: png_set_alpha_mode API |
| |
| Version 1.5.3beta07 [May 9, 2011] |
| Added expand_16 support to the high level interface. |
| |
| 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 |
