123 lines
5.3 KiB
Plaintext
123 lines
5.3 KiB
Plaintext
pngchange.txt - changes for libpng
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version 0.2
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added reader into png.h
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fixed small problems in stub file
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version 0.3
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added pull reader
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split up pngwrite.c to several files
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added pnglib.txt
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added example.c
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cleaned up writer, adding a few new tranformations
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fixed some bugs in writer
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interfaced with zlib 0.5
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added K&R support
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added check for 64 KB blocks for 16 bit machines
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version 0.4
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cleaned up code and commented code
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simplified time handling into png_time
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created png_color_16 and png_color_8 to handle color needs
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cleaned up color type defines
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fixed various bugs
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made various names more consistant
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interfaced with zlib 0.71
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cleaned up zTXt reader and writer (using zlib's Reset functions)
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split transformations into pngrtran.c and pngwtran.c
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version 0.5
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interfaced with zlib 0.8
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fixed many reading and writing bugs
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saved using 3 spaces instead of tabs
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version 0.6
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added png_large_malloc() and png_large_free()
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added png_size_t
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cleaned up some compiler warnings
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added png_start_read_image()
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version 0.7
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cleaned up lots of bugs
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finished dithering and other stuff
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added test program
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changed name from pnglib to libpng
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version 0.71
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changed pngtest.png for zlib 0.93
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fixed error in libpng.txt and example.c
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version 0.8
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cleaned up some bugs
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added png_set_filler()
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split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
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added #define's to remove unwanted code
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moved png_info_init() to png.c
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added old_size into png_realloc()
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added functions to manually set filtering and compression info
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changed compression parameters based on image type
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optimized filter selection code
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added version info
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changed external functions passing floats to doubles (k&r problems?)
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put all the configurable stuff in pngconf.h
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enabled png_set_shift to work with paletted images on read
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added png_read_update_info() - updates info structure with
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transformations
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version 0.81
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incorporated Tim Wegner's medium model code (thanks, Tim)
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version 0.85
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added more medium model code (almost everythings a far)
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added i/o, error, and memory callback functions
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fixed some bugs (16 bit, 4 bit interlaced, etc.)
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added first run progressive reader (barely tested)
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version 0.86
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fixed bugs
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improved documentation
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version 0.87
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fixed medium model bugs
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fixed other bugs introduced in 0.85 and 0.86
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added some minor documentation
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version 0.88
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fixed progressive bugs
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replaced tabs with spaces
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cleaned up documentation
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added callbacks for read/write and warning/error functions
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version 0.89
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added new initialization API to make libpng work better with shared libs
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we now have png_create_read_struct(), png_create_write_struct(),
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png_create_info_struct(), png_destroy_read_struct(), and
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png_destroy_write_struct() instead of the separate calls to
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malloc and png_read_init(), png_info_init(), and png_write_init()
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changed warning/error callback functions to fix bug - this means you
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should use the new initialization API if you were using the old
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png_set_message_fn() calls, and that the old API no longer exists
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so that people are aware that they need to change their code
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changed filter selection API to allow selection of multiple filters
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since it didn't work in previous versions of libpng anyways
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optimized filter selection code
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fixed png_set_background() to allow using an arbitrary RGB color for
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paletted images
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fixed gamma and background correction for paletted images, so
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png_correct_palette is not needed unless you are correcting an
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external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
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in pngconf.h) - if nobody uses this, it may disappear in the future.
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fixed bug with Borland 64K memory allocation (Alexander Lehmann)
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fixed bug in interlace handling (Smarasderagd, I think)
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added more error checking for writing and image to reduce invalid files
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separated read and write functions so that they won't both be linked
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into a binary when only reading or writing functionality is used
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new pngtest image also has interlacing and zTXt
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updated documentation to reflect new API
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version 0.90
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made CRC errors/warnings on critical and ancillary chunks configurable
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libpng will use the zlib CRC routines by (compile-time) default
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changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
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added external C++ wrapper statements to png.h (Gilles Dauphin)
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allow PNG file to be read when some or all of file signature has already
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been read from the beginning of the stream (this affects the size of
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info_struct and invalidates all programs that use a shared libpng)
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fixed png_filler() declarations
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fixed? background color conversions
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fixed order of error function pointers to match documentation
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current chunk name is now available in png_struct to reduce the number
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of nearly identical error messages (will simplify multi-lingual
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support when available)
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try to get ready for unknown-chunk callback functions:
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- previously read critical chunks are flagged, so the chunk handling
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routines can determine if the chunk is in the right place
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- all chunk handling routines have the same prototypes, so we will
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be able to handle all chunks via a callback mechanism
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