88 lines
5.1 KiB
Plaintext
88 lines
5.1 KiB
Plaintext
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Libpng 1.0.6 - March 21, 2000
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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 (1.0.5):
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Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
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Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
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Further optimization and bugfix of pngvcrd.c
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Revised pngset.c so that it does not allocate or free memory in the user's
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text_ptr structure. Instead, it makes its own copy.
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Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
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Created separate write_end_info_struct in pngtest.c for a more severe test.
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Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and
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PNG_FLAG_WROTE_tIME from flags to mode.
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Added png_write_info_before_PLTE() function.
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Fixed some typecasting in contrib/gregbook/*.c
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Updated scripts/makevms.com (Martin Zinser)
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Moved png_get_header_version from png.h to png.c, to accomodate ansi2knr.
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Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
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accomodate making DLL's: Moved usr_png_ver from global variable to function
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png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and
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eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays
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into local arrays. Eliminated use of global png_pass arrays. Declared the
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png_CHNK and png_pass arrays to be "const". Made the global arrays
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available to applications when PNG_NO_GLOBAL_ARRAYS is not defined or
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when PNG_USE_GLOBAL_ARRAYS is defined. Made available to applications a
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macro "PNG_USE_LOCAL_ARRAYS".
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Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.
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Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3
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Added PNG_EXPORT_VAR macro to accommodate making DLL's.
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Refactored the inflate/deflate support to make adding new chunks with
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trailing compressed parts easier in the future (Eric S. Raymond).
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Added iCCP, iTXt, sCAL, and sPLT support; added "lang", "lang_key", and
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itxt_length" members to the png_text structure (Eric S. Raymond, Glenn R-P)
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Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned
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offsets (Eric S. Raymond).
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Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into
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PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED
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macros, leaving the separate macros also available.
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Removed comments on #endifs at the end of many short, non-nested #if-blocks.
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Changed makefile.solaris to issue a warning about potential problems when
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the ucb "ld" is in the path ahead of the ccs "ld".
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Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.
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Added code in pngwrite.c to work around a newly discovered zlib bug.
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Unknown chunk handling is now supported (Eric S. Raymond).
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Option to eliminate all floating point support was added. Some new
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fixed-point functions such as png_set_gAMA_fixed() were added.
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Added new type "png_fixed_point" for integers that hold float*100000 values
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Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
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Added png_handle_as_unknown()
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Added chunk_list and num_chunk_list members of png_ptr.
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Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
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Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
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for setting a callback function to handle unknown chunks and for
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retrieving the associated user pointer (Glenn).
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Added png_free_data() function.
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Added high-level functions png_read_png() and png_write_png() (ESR).
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Renamed pngdll.mak to makefile.bd32
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Cosmetic changes in pngtest.c
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Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
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Revised makefile.gcmmx
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Fixed a bug in pngrtran.c that improperly expanded the background color.
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Return *num_text=0 from png_get_text() when appropriate, and fix documentation
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of png_get_text() in libpng.txt/libpng.3.
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Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() and
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"png_jmpbuf()" macros to pngconf.h, to help people migrate to the new error
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handler that's planned for the next libpng release, and changed example.c,
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pngtest.c, and contrib programs to use this macro.
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Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
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Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
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in pngget.c
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Updated makefile.linux and makefile.gccmmx to make directories conditionally.
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Increased precision of rgb_to_gray calculations from 8 to 15 bits and
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added png_set_rgb_to_gray_fixed() function.
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Added makefile.bc32 (32-bit Borland C++, C mode)
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Updated references to the zlib home page, which has moved to freesoftware.com.
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Corrected bugs in documentation regarding png_read_row() and png_write_row().
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Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
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revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
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Added makefile.sggcc (SGI IRIX with gcc)
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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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