172 lines
9.4 KiB
Plaintext
172 lines
9.4 KiB
Plaintext
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Libpng 1.0.5s - February 18, 2000
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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 (1.0.5):
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version libpng-1.0.5a October 23, 1999
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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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Created separate write_end_info_struct in pngtest.c for a more severe test.
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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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version libpng-1.0.5b November 23, 1999
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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 and added makevms.com to contrib/gregbook
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and contrib/pngminus (Martin Zinser)
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version libpng-1.0.5c November 26, 1999
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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 pngtypes.h. 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 (although none are used in libpng itself) when
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PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined.
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Removed some extraneous "-I" from contrib/pngminus/makefile.std
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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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version libpng-1.0.5d November 29, 1999
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Add type cast (png_const_charp) two places in png.c
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Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
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Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
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to applications a macro "PNG_USE_LOCAL_ARRAYS".
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#ifdef out all the new declarations when PNG_USE_GLOBAL_ARRAYS is defined.
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Added PNG_EXPORT_VAR macro to accommodate making DLL's.
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version libpng-1.0.5e November 30, 1999
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Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
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structure; refactored the inflate/deflate support to make adding new chunks
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with trailing compressed parts easier in the future, and added new functions
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png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP,
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png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond).
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NOTE: Applications that write text chunks MUST define png_text->lang. Before
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calling png_set_text(). It must be set to NULL if you want to write tEXt or
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zTXt chunks. If you want your application to be able to run with older
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versions of libpng, use
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#ifdef PNG_iTXt_SUPPORTED
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png_text[i].lang = NULL;
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#endif
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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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version libpng-1.0.5f December 6, 1999
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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 sCAL chunk support (Eric S. Raymond).
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version libpng-1.0.5g December 7, 1999
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Fixed "png_free_spallettes" typo in png.h
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Added code to handle new chunks in pngpread.c
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Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block
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Added "translated_key" to png_text structure and png_write_iTXt().
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Added code in pngwrite.c to work around a newly discovered zlib bug.
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version libpng-1.0.5h December 10, 1999
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NOTE: regarding the note for version 1.0.5e, the following must also
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be included in your code:
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png_text[i].translated_key = NULL;
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Unknown chunk handling is now supported.
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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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version libpng-1.0.5i December 13, 1999
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Added some type casts to silence compiler warnings.
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Renamed "png_free_spalette" to "png_free_spalettes" for consistency.
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Removed leading blanks from a #define in pngvcrd.c
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Added some parameters to the new png_set_keep_unknown_chunks() function,
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and relocated it in pngset.c
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Added a test for up->location != 0 in the first instance of writing
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unknown chunks in pngwrite.c
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Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to
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prevent recursion.
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Added png_free_hIST() function.
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Various patches to fix bugs in the sCAL and integer cHRM processing,
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and to add some convenience macros for use with sCAL.
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version libpng-1.0.5j December 21, 1999
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Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
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around buggy compilers.
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Added new type "png_fixed_point" for integers that hold float*100000 values
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Restored backward compatibility of tEXt/zTXt chunk processing:
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Added members "lang_key" and "itxt_length" to png_text struct. Set
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text_length=0 when "text" contains iTXt data. Use the "compression"
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member to distinguish among tEXt/zTXt/iTXt types. Restored the first
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four members of png_text to the same order as v.1.0.5d. The "Note" above,
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about backward incompatibility of libpng-1.0.5e, no longer applies.
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Added PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.
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Fixed png_read|write_iTXt() to read|write parameters in the right order.
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and to write the iTXt chunk after IDAT if it appears in the end_ptr.
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Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
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Reversed the order of trying to write floating-point and fixed-point gAMA.
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version libpng-1.0.5k December 27, 1999
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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 png_free_chunk_list() function and chunk_list and num_chunk_list members
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of png_ptr.
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Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.
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Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings
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about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)
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Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
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Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
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Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
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version libpng-1.0.5l January 1, 2000
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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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version 1.0.5m [January 7, 2000]
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Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
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version 1.0.5n [January 9, 2000]
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Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
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own memory for info_ptr->palette. This makes it safe for the calling
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application to free its copy of the palette any time after it calls
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png_set_PLTE().
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version 1.0.5o [January 20, 2000]
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Cosmetic changes only (removed some trailing blanks and TABs)
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version 1.0.5p [January 31, 2000]
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Renamed pngdll.mak to makefile.bd32
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Cosmetic changes in pngtest.c
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version 1.0.5q [February 5, 2000]
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Relocated the makefile.solaris warning about PATH problems.
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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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Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
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version 1.0.5r [February 7, 2000]
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Removed superfluous prototype for png_get_itxt from png.h
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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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version 1.0.5s [February 18, 2000]
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Added "png_jmpbuf()" macro to pngconf.h, to help people migrate to the
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new error handler that's planned for the next libpng release, and changed
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example.c, 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 a bug in png_read_png() that caused it to fail to expand some images
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that it should have expanded.
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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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Changed the allocation of palette, history, and trans arrays back to
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the version 1.0.5 method (linking instead of copying) which restores
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backward compatibility with version 1.0.5. Added some remarks about
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that in example.c
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Updated makefile.linux and makefile.gccmmx to make directories conditionally.
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Made cosmetic changes to pngasmrd.h
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Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
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Modified png_read_png() to allocate info_ptr->row_pointers only if it
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hasn't already been allocated.
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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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