86 lines
5.0 KiB
Plaintext
86 lines
5.0 KiB
Plaintext
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Libpng 1.0.4c - October 1, 1999
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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 (1.0.3):
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version 1.0.3a [August 12, 1999]
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Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
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if an attempt is made to read an interlaced image when it's not supported.
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Added check if png_ptr->trans is defined before free'ing it in pngread.c
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Modified the Y2K statement to include versions back to version 0.71
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Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c
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Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)
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Replaced leading blanks with tab characters in makefile.hux
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Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.
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Changed (float)red and (float)green to (double)red, (double)green
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in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.
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Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).
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Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).
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Updated documentation to refer to the PNG-1.2 specification.
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Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c
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in makefile.knr, INSTALL, and README (L. Peter Deutsch)
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Fixed bugs in calculation of the length of rowbytes when adding alpha
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channels to 16-bit images, in pngrtran.c (Chris Nokleberg)
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Added function png_set_user_transform_info() to store user_transform_ptr,
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user_depth, and user_channels into the png_struct, and a function
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png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)
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Added function png_set_empty_plte_permitted() to make libpng useable
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in MNG applications.
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Corrected the typedef for png_free_ptr in png.h (Jesse Jones).
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Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
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consistent with PNG-1.2, and allow variance of 500 before complaining.
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Added assembler code contributed by Intel in file pngvcrd.c and modified
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makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, Gilles Vollant)
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Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
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Added some aliases for png_set_expand() in pngrtran.c, namely
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png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
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(Greg Roelofs, in "PNG: The Definitive Guide").
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Added makefile.beo for BEOS on X86, contributed by Sander Stok.
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version 1.0.3b [August 26, 1999]
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Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
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Changed leading blanks to tabs in all makefiles.
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Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
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Made alternate versions of png_set_expand() in pngrtran.c, namely
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png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
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(Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases.
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Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
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Revised calculation of num_blocks in pngmem.c to avoid a potentially
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negative shift distance, whose results are undefined in the C language.
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Added a check in pngset.c to prevent writing multiple tIME chunks.
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Added a check in pngwrite.c to detect invalid small window_bits sizes.
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version 1.0.3d [September 4, 1999]
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Fixed type casting of igamma in pngrutil.c
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Added new png_expand functions to scripts/pngdef.pas and pngos2.def
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Added a demo read_user_transform_fn that examines the row filters in pngtest.c
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version 1.0.4 [September 24, 1999]
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Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
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Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
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Made several minor corrections to pngtest.c
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Changed "hptr += 16L" to "hptr = hptr + 16L" in pngmem.c for Turbo 3.0
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Renamed the makefiles with longer but more user friendly extensions.
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Copied the PNG copyright and license to a separate LICENSE file.
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Revised documentation, png.h, and example.c to remove reference to
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"viewing_gamma" which no longer appears in the PNG specification.
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Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
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Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
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Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
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assembler code) and makefile.vcwin32 (doesn't).
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Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
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version 1.0.4a September 25, 1999
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Increase max_pixel_depth in pngrutil.c if a user transform needs it.
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Changed several division operations to right-shifts in pngvcrd.c
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version 1.0.4b September 30, 1999
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Added parentheses in line 3732 of pngvcrd.c
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Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
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version 1.0.4c [October 1, 1999]
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Added a "png_check_version" function in png.c and pngtest.c that will generate
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a helpful compiler error if an old png.h is found in the search path.
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Send comments/corrections/commendations to
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png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu
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Glenn R-P
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