101 lines
4.4 KiB
Plaintext
101 lines
4.4 KiB
Plaintext
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Libpng 1.5.6rc01 - October 26, 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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1.5.6rc01.tar.xz (LZMA-compressed, recommended)
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1.5.6rc01.tar.gz
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1.5.6rc01.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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lp156r01.7z (LZMA-compressed, recommended)
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lp156r01.zip
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Other information:
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1.5.6rc01-README.txt
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1.5.6rc01-LICENSE.txt
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Changes since the last public release (1.5.5):
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Version 1.5.6beta01 [September 22, 2011]
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Fixed some 64-bit type conversion warnings in pngrtran.c
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Moved row_info from png_struct to a local variable.
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The various interlace mask arrays have been made into arrays of
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bytes and made PNG_CONST and static (previously some arrays were
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marked PNG_CONST and some weren't).
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Additional checks have been added to the transform code to validate the
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pixel depths after the transforms on both read and write.
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Removed some redundant code from pngwrite.c, in png_desgtroy_write_struct().
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Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4].
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This removes the need to allocate temporary strings for chunk names on
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the stack in the read/write code. Unknown chunk handling still uses the
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string form because this is exposed in the API.
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Version 1.5.6beta02 [September 26, 2011]
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Added a note in the manual the png_read_update_info() must be called only
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once with a particular info_ptr.
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Fixed a typo in the definition of the new PNG_STRING_FROM_CHUNK(s,c) macro.
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Version 1.5.6beta03 [September 28, 2011]
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Revised test-pngtest.sh to report FAIL when pngtest fails.
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Added "--strict" option to pngtest, to report FAIL when the failure is
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only because the resulting valid files are different.
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Revised CMakeLists.txt to work with mingw and removed some material from
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CMakeLists.txt that is no longer useful in libpng-1.5.
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Version 1.5.6beta04 [October 5, 2011]
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Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")."
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Version 1.5.6beta05 [October 12, 2011]
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Speed up png_combine_row() for interlaced images. This reduces the generality
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of the code, allowing it to be optimized for Adam7 interlace. The masks
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passed to png_combine_row() are now generated internally, avoiding
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some code duplication and localizing the interlace handling somewhat.
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Align png_struct::row_buf - previously it was always unaligned, caused by
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a bug in the code that attempted to align it; the code needs to subtract
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one from the pointer to take account of the filter byte prepended to
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each row.
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Optimized png_combine_row() when rows are aligned. This gains a small
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percentage for 16-bit and 32-bit pixels in the typical case where the
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output row buffers are appropriately aligned. The optimization was not
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previously possible because the png_struct buffer was always misaligned.
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Fixed bug in png_write_chunk_header() debug print, introduced in 1.5.6beta01.
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Version 1.5.6beta06 [October 17, 2011]
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Removed two redundant tests for unitialized row.
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Fixed a relatively harmless memory overwrite in compressed text writing
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with a 1 byte zlib buffer.
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Add ability to call png_read_update_info multiple times to pngvalid.c
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Fixes for multiple calls to png_read_update_info. These fixes attend to
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most of the errors revealed in pngvalid, however doing the gamma work
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twice results in inaccuracies that can't be easily fixed. There is now
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a warning in the code if this is going to happen.
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Turned on multiple png_read_update_info in pngvalid transform tests.
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Prevent libpng from overwriting unused bits at the end of the image when
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it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would
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overwrite the partial byte at the end of each row if the row width was not
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an exact multiple of 8 bits and the image is not interlaced.
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Version 1.5.6beta07 [October 21, 2011]
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Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row
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(Mans Rullgard).
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Version 1.5.6rc01 [October 26, 2011]
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Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM"
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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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