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| Libpng 1.0.4 - September 17, 1999 |
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| This is a public release of libpng, intended for use in production codes. |
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| Changes since the last public release (1.0.3): |
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| Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning |
| if an attempt is made to read an interlaced image when it's not supported. |
| Added check if png_ptr->trans is defined before free'ing it in pngread.c |
| Modified the Y2K statement to include versions back to version 0.71 |
| Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c |
| Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments) |
| Replaced leading blanks with tab characters in makefile.hux |
| Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents. |
| Changed (float)red and (float)green to (double)red, (double)green |
| in png_set_rgb_to_gray() to avoid "promotion" problems in AIX. |
| Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey). |
| Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt). |
| Updated documentation to refer to the PNG-1.2 specification. |
| Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c |
| in makefile.knr, INSTALL, and README (L. Peter Deutsch) |
| Fixed bugs in calculation of the length of rowbytes when adding alpha |
| channels to 16-bit images, in pngrtran.c (Chris Nokleberg) |
| Added function png_set_user_transform_info() to store user_transform_ptr, |
| user_depth, and user_channels into the png_struct, and a function |
| png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg) |
| Added function png_set_empty_plte_permitted() to make libpng useable |
| in MNG applications. |
| Corrected the typedef for png_free_ptr in png.h (Jesse Jones). |
| Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be |
| consistent with PNG-1.2, and allow variance of 500 before complaining. |
| Added assembler code contributed by Intel in file pngvcrd.c and modified |
| makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, Gilles Vollant) |
| Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code. |
| Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy. |
| Added makefile.beo for BEOS on X86, contributed by Sander Stok. |
| Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h |
| Changed leading blanks to tabs in all makefiles. |
| Made alternate versions of png_set_expand() in pngrtran.c, namely |
| png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha |
| (Greg Roelofs, in "PNG: The Definitive Guide"). |
| Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h |
| Revised calculation of num_blocks in pngmem.c to avoid a potentially |
| negative shift distance, whose results are undefined in the C language. |
| Added a check in pngset.c to prevent writing multiple tIME chunks. |
| Added a check in pngwrite.c to detect invalid small window_bits sizes. |
| Added a demo read_user_transform_fn that examines the row filters in pngtest.c |
| Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined |
| Made several minor corrections to pngtest.c |
| Changed "hptr += 16L" to "hptr = hptr + 16L" in pngmem.c for Turbo 3.0 |
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| Send comments/corrections/commendations to |
| png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu |
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| Glenn R-P |
