| |
| Libpng 1.6.0beta04 - December 24, 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 |
| |
| 1.6.0beta04.tar.xz (LZMA-compressed, recommended) |
| 1.6.0beta04.tar.gz |
| 1.6.0beta04.tar.bz2 |
| |
| Source files with CRLF line endings (for Windows), without the |
| "configure" script |
| |
| lp160b04.7z (LZMA-compressed, recommended) |
| lp160b04.zip |
| |
| Other information: |
| |
| 1.6.0beta04-README.txt |
| 1.6.0beta04-LICENSE.txt |
| |
| Changes since the last public release (1.5.7): |
| |
| Version 1.6.0beta01 [December 15, 2011] |
| Removed machine-generated configure files from the GIT repository (they will |
| continue to appear in the tarball distributions). |
| Restored the new 'simplified' API, which was started in libpng-1.5.7beta02 |
| but later deleted from libpng-1.5.7beta05. |
| Added example programs for the new 'simplified' API. |
| Added ANSI-C (C90) headers and require them, and take advantage of the |
| change. Also fixed some of the projects/* and contrib/* files that needed |
| updates for libpng16 and the move of pngvalid.c. |
| With this change the required ANSI-C header files are assumed to exist: the |
| implementation must provide float.h, limits.h, stdarg.h and stddef.h and |
| libpng relies on limits.h and stddef.h existing and behaving as defined |
| (the other two required headers aren't used). Non-ANSI systems that don't |
| have stddef.h or limits.h will have to provide an appropriate fake |
| containing the relevant types and #defines. |
| The use of FAR/far has been eliminated and the definition of png_alloc_size_t |
| is now controlled by a flag so that 'small size_t' systems can select it |
| if necessary. Libpng 1.6 may not currently work on such systems -- it |
| seems likely that it will ask 'malloc' for more than 65535 bytes with any |
| image that has a sufficiently large row size (rather than simply failing |
| to read such images). |
| New tools directory containing tools used to generate libpng code. |
| Fixed race conditions in parallel make builds. With higher degrees of |
| parallelism during 'make' the use of the same temporary file names such |
| as 'dfn*' can result in a race where a temporary file from one arm of the |
| build is deleted or overwritten in another arm. This changes the |
| temporary files for suffix rules to always use $* and ensures that the |
| non-suffix rules use unique file names. |
| |
| Version 1.6.0beta02 [December 21, 2011] |
| Correct configure builds where build and source directories are separate. |
| The include path of 'config.h' was erroneously made relative in pngvalid.c |
| in libpng 1.5.7. |
| |
| Version 1.6.0beta03 [December 22, 2011] |
| Start-up code size improvements, error handler flexibility. These changes |
| alter how the tricky allocation of the initial png_struct and png_info |
| structures are handled. png_info is now handled in pretty much the same |
| way as everything else, except that the allocations handle NULL return |
| silently. png_struct is changed in a similar way on allocation and on |
| deallocation a 'safety' error handler is put in place (which should never |
| be required). The error handler itself is changed to permit mismatches |
| in the application and libpng error buffer size; however, this means a |
| silent change to the API to return the jmp_buf if the size doesn't match |
| the size from the libpng compilation; libpng now allocates the memory and |
| this may fail. Overall these changes result in slight code size |
| reductions; however, this is a reduction in code that is always executed |
| so is particularly valuable. Overall on a 64-bit system the libpng DLL |
| decreases in code size by 1733 bytes. pngerror.o increases in size by |
| about 465 bytes because of the new functionality. |
| |
| Version 1.6.0beta04 [December 24, 2011] |
| Regenerated configure scripts with automake-1.11.2 |
| Eliminated png_info_destroy(). It is now used only in png.c and only calls |
| one other internal function and memset(). |
| Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously |
| it was disabled whenever internal fixed point arithmetic was selected, |
| which meant it didn't exist even on systems where FP was available but not |
| preferred. |
| |
| 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 |