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84 lines
3.5 KiB
Plaintext
84 lines
3.5 KiB
Plaintext
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Libpng 1.5.3beta04 - April 18, 2011
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This is not intended to be a public release. It will be replaced
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within a few weeks by a public version or by another test version.
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Files available for download:
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Source files with LF line endings (for Unix/Linux) and with a
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"configure" script
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1.5.3beta04.tar.xz (LZMA-compressed, recommended)
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1.5.3beta04.tar.gz
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1.5.3beta04.tar.bz2
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Source files with CRLF line endings (for Windows), without the
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"configure" script
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lp153b04.7z (LZMA-compressed, recommended)
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lp153b04.zip
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Other information:
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1.5.3beta04-README.txt
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1.5.3beta04-LICENSE.txt
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Changes since the last public release (1.5.2):
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Version 1.5.3beta01 [April 1, 2011]
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Re-initialize the zlib compressor before compressing non-IDAT chunks.
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Added API functions to set parameters for zlib compression of non-IDAT
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chunks.
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Version 1.5.3beta02 [April 3, 2011]
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Updated scripts/symbols.def with new API functions.
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Only compile the new zlib re-initializing code when text or iCCP is
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supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro.
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Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03).
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Optimize the zlib CMF byte in non-IDAT compressed chunks
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Version 1.5.3beta03 [April 16, 2011]
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Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have
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snprintf, and the "__STRICT_ANSI__" detects that condition more reliably
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than __STDC__ (John Bowler).
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Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells
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the compiler that a user supplied callback (the error handler) does not
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return, yet there is no guarantee in practice that the application code
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will correctly implement the error handler because the compiler only
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issues a warning if there is a mistake (John Bowler).
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Removed the no-longer-used PNG_DEPSTRUCT macro.
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Updated the zlib version to 1.2.5 in the VStudio project.
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Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in
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pngwutil.c (John Bowler).
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Fixed bug with stripping the filler or alpha channel when writing, that
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was introduced in libpng-1.5.2beta01 (bug report by Andrew Church).
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Version 1.5.3beta04 [April 18, 2011]
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Updated pngtest.png with the new zlib CMF optimization.
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Cleaned up conditional compilation code and of background/gamma handling
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Internal changes only except a new option to avoid compiling the
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png_build_grayscale_palette API (which is not used at all internally.)
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The main change is to move the transform tests (READ_TRANSFORMS,
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WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids
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calls to spurious functions if all transforms are disabled and slightly
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simplifies those functions. Pngvalid modified to handle this.
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A minor change is to stop the strip_16 and expand_16 interfaces from
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disabling each other; this allows the future alpha premultiplication
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code to use 16-bit intermediate values while still producing 8-bit output.
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png_do_background and png_do_gamma have been simplified to take a single
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pointer to the png_struct rather than pointers to every item required
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from the png_struct. This makes no practical difference to the internal
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code.
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A serious bug in the pngvalid internal routine 'standard_display_init' has
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been fixed - this failed to initialize the red channel and accidentally
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initialized the alpha channel twice.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
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(subscription required; visit
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https://lists.sourceforge.net/lists/listinfo/png-mng-implement
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to subscribe) or to glennrp at users.sourceforge.net
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Glenn R-P
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