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50 lines
2.8 KiB
Plaintext
50 lines
2.8 KiB
Plaintext
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Libpng 1.0.1c May 9, 1998
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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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Changes since the last public release:
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version 1.0.1a [April 21, 1998]
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Optimized Paeth calculations by replacing abs() function calls with intrinsics
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plus other loop optimizations. Improves avg decoding speed by about 20%.
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Commented out i386istic "align" compiler flags in makefile.lnx.
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Reduced the default warning level in some makefiles, to make them consistent.
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Removed references to IJG and JPEG in the ansi2knr.c copyright statement.
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Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.
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Added grayscale and 16-bit capability to png_do_read_filler().
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Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes
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too large when writing an image with bit_depth < 8 (Bob Dellaca).
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Corrected some bugs in the experimental weighted filtering heuristics.
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Moved a misplaced pngrutil code block that truncates tRNS if it has more
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than num_palette entries -- test was done before num_palette was defined.
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Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
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Changed compiler flags in makefile.wat for better optimization (Pawel Mrochen).
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version 1.0.1b [May 2, 1998]
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Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
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Relocated the png_composite macros from pngrtran.c to png.h (Greg).
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Added makefile.sco (contributed by Mike Hopkirk).
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Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
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Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
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More work on the Paeth-filtering, achieving imperceptible speedup (A Kleinert).
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More work on loop optimization which may help when compiled with C++ compilers.
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Added warnings when people try to use transforms they've defined out.
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Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
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Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
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version 1.0.1c [May 9, 1998]
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Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
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filler bytes should have been 0xff instead of 0xf.
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Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
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Moved PNG_WRIGHT_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
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out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
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Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,
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for consistency, in pngconf.h
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Added individual "ifndef PNG_NO_CAPABILITY" for the capabilities in pngconf.h
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to make it easier to remove unwanted capabilities via the compile line
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Send comments/corrections/commendations to
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png-implement@dworkin.wustl.edu or to randeg@alumni.rpi.edu
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Glenn R-P
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