219 lines
11 KiB
Plaintext
219 lines
11 KiB
Plaintext
pngchange.txt - changes for libpng
|
|
|
|
version 0.2
|
|
added reader into png.h
|
|
fixed small problems in stub file
|
|
version 0.3
|
|
added pull reader
|
|
split up pngwrite.c to several files
|
|
added pnglib.txt
|
|
added example.c
|
|
cleaned up writer, adding a few new tranformations
|
|
fixed some bugs in writer
|
|
interfaced with zlib 0.5
|
|
added K&R support
|
|
added check for 64 KB blocks for 16 bit machines
|
|
version 0.4
|
|
cleaned up code and commented code
|
|
simplified time handling into png_time
|
|
created png_color_16 and png_color_8 to handle color needs
|
|
cleaned up color type defines
|
|
fixed various bugs
|
|
made various names more consistant
|
|
interfaced with zlib 0.71
|
|
cleaned up zTXt reader and writer (using zlib's Reset functions)
|
|
split transformations into pngrtran.c and pngwtran.c
|
|
version 0.5
|
|
interfaced with zlib 0.8
|
|
fixed many reading and writing bugs
|
|
saved using 3 spaces instead of tabs
|
|
version 0.6
|
|
added png_large_malloc() and png_large_free()
|
|
added png_size_t
|
|
cleaned up some compiler warnings
|
|
added png_start_read_image()
|
|
version 0.7
|
|
cleaned up lots of bugs
|
|
finished dithering and other stuff
|
|
added test program
|
|
changed name from pnglib to libpng
|
|
version 0.71 [June, 1995]
|
|
changed pngtest.png for zlib 0.93
|
|
fixed error in libpng.txt and example.c
|
|
version 0.8
|
|
cleaned up some bugs
|
|
added png_set_filler()
|
|
split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
|
|
added #define's to remove unwanted code
|
|
moved png_info_init() to png.c
|
|
added old_size into png_realloc()
|
|
added functions to manually set filtering and compression info
|
|
changed compression parameters based on image type
|
|
optimized filter selection code
|
|
added version info
|
|
changed external functions passing floats to doubles (k&r problems?)
|
|
put all the configurable stuff in pngconf.h
|
|
enabled png_set_shift to work with paletted images on read
|
|
added png_read_update_info() - updates info structure with
|
|
transformations
|
|
version 0.81 [August, 1995]
|
|
incorporated Tim Wegner's medium model code (thanks, Tim)
|
|
version 0.82 [September, 1995]
|
|
[unspecified changes]
|
|
version 0.85 [December, 1995]
|
|
added more medium model code (almost everything's a far)
|
|
added i/o, error, and memory callback functions
|
|
fixed some bugs (16 bit, 4 bit interlaced, etc.)
|
|
added first run progressive reader (barely tested)
|
|
version 0.86 [January, 1996]
|
|
fixed bugs
|
|
improved documentation
|
|
version 0.87 [January, 1996]
|
|
fixed medium model bugs
|
|
fixed other bugs introduced in 0.85 and 0.86
|
|
added some minor documentation
|
|
version 0.88 [January, 1996]
|
|
fixed progressive bugs
|
|
replaced tabs with spaces
|
|
cleaned up documentation
|
|
added callbacks for read/write and warning/error functions
|
|
version 0.89 [July, 1996]
|
|
added new initialization API to make libpng work better with shared libs
|
|
we now have png_create_read_struct(), png_create_write_struct(),
|
|
png_create_info_struct(), png_destroy_read_struct(), and
|
|
png_destroy_write_struct() instead of the separate calls to
|
|
malloc and png_read_init(), png_info_init(), and png_write_init()
|
|
changed warning/error callback functions to fix bug - this means you
|
|
should use the new initialization API if you were using the old
|
|
png_set_message_fn() calls, and that the old API no longer exists
|
|
so that people are aware that they need to change their code
|
|
changed filter selection API to allow selection of multiple filters
|
|
since it didn't work in previous versions of libpng anyways
|
|
optimized filter selection code
|
|
fixed png_set_background() to allow using an arbitrary RGB color for
|
|
paletted images
|
|
fixed gamma and background correction for paletted images, so
|
|
png_correct_palette is not needed unless you are correcting an
|
|
external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
|
|
in pngconf.h) - if nobody uses this, it may disappear in the future.
|
|
fixed bug with Borland 64K memory allocation (Alexander Lehmann)
|
|
fixed bug in interlace handling (Smarasderagd, I think)
|
|
added more error checking for writing and image to reduce invalid files
|
|
separated read and write functions so that they won't both be linked
|
|
into a binary when only reading or writing functionality is used
|
|
new pngtest image also has interlacing and zTXt
|
|
updated documentation to reflect new API
|
|
version 0.90 [January, 1997]
|
|
made CRC errors/warnings on critical and ancillary chunks configurable
|
|
libpng will use the zlib CRC routines by (compile-time) default
|
|
changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
|
|
added external C++ wrapper statements to png.h (Gilles Dauphin)
|
|
allow PNG file to be read when some or all of file signature has already
|
|
been read from the beginning of the stream. ****This affects the size
|
|
of info_struct and invalidates all programs that use a shared libpng****
|
|
fixed png_filler() declarations
|
|
fixed? background color conversions
|
|
fixed order of error function pointers to match documentation
|
|
current chunk name is now available in png_struct to reduce the number
|
|
of nearly identical error messages (will simplify multi-lingual
|
|
support when available)
|
|
try to get ready for unknown-chunk callback functions:
|
|
- previously read critical chunks are flagged, so the chunk handling
|
|
routines can determine if the chunk is in the right place
|
|
- all chunk handling routines have the same prototypes, so we will
|
|
be able to handle all chunks via a callback mechanism
|
|
try to fix Linux "setjmp" buffer size problems
|
|
version 0.95 [March, 1997]
|
|
fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
|
|
fixed bug in PNG file signature compares when start != 0
|
|
changed parameter type of png_set_filler(...filler...) from png_byte
|
|
to png_uint_32
|
|
added test for MACOS to ensure that both math.h and fp.h are not #included
|
|
added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
|
|
added "packswap" transformation, which changes the endianness of
|
|
packed-pixel bytes (Kevin Bracey)
|
|
added "strip_alpha" transformation, which removes the alpha channel of
|
|
input images without using it (not neccesarily a good idea)
|
|
added "swap_alpha" transformation, which puts the alpha channel in front
|
|
of the color bytes instead of after
|
|
removed all implicit variable tests which assume NULL == 0 (I think)
|
|
changed several variables to "png_size_t" to show 16/32-bit limitations
|
|
added new pCAL chunk read/write support
|
|
added experimental filter selection weighting (Greg Roelofs)
|
|
removed old png_set_rgbx() and png_set_xrgb() functions that have been
|
|
obsolete for about 2 years now (use png_set_filler() instead)
|
|
added macros to read 16- and 32-bit ints directly from buffer, to be
|
|
used only on those systems that support it (namely PowerPC and 680x0)
|
|
With some testing, this may become the default for MACOS/PPC systems.
|
|
only calculate CRC on data if we are going to use it
|
|
added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
|
|
added macros for simple libpng debugging output selectable at compile time
|
|
removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
|
|
more description of info_struct in libpng.txt and png.h
|
|
more instructions in example.c
|
|
more chunk types tested in pngtest.c
|
|
renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
|
|
png_set_<chunk>. We now have corresponding png_get_<chunk>
|
|
functions in pngget.c to get infomation in info_ptr. This isolates
|
|
the application from the internal organization of png_info_struct
|
|
(good for shared library implementations).
|
|
version 0.96 [May, 1997]
|
|
fixed serious bug with < 8bpp images introduced in 0.95
|
|
fixed 256-color transparency bug (Greg Roelofs)
|
|
fixed up documentation (Greg Roelofs, Laszlo Nyul)
|
|
fixed "error" in pngconf.h for Linux setjmp() behaviour
|
|
fixed DOS medium model support (Tim Wegner)
|
|
fixed png_check_keyword() for case with error in static string text
|
|
added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
|
|
added typecasts to quiet compiler errors
|
|
added more debugging info
|
|
version 0.97 [January, 1998]
|
|
removed PNG_USE_OWN_CRC capability
|
|
relocated png_set_crc_action from pngrutil.c to pngrtran.c
|
|
fixed typecasts of "new_key", etc. (Andreas Dilger)
|
|
added RFC 1152 [sic] date support
|
|
fixed bug in gamma handling of 4-bit grayscale
|
|
added 2-bit grayscale gamma handling (Glenn R-P)
|
|
added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
|
|
minor corrections in libpng.txt
|
|
added simple sRGB support (Glenn R-P)
|
|
easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
|
|
all configurable options can be selected from command-line instead
|
|
of having to edit pngconf.h (Glenn R-P)
|
|
fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
|
|
added more conditions for png_do_background, to avoid changing
|
|
black pixels to background when a background is supplied and
|
|
no pixels are transparent
|
|
repaired PNG_NO_STDIO behaviour
|
|
tested NODIV support and made it default behaviour (Greg Roelofs)
|
|
added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
|
|
regularized version numbering scheme and bumped shared-library major
|
|
version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs)
|
|
version 0.98 [January, 1998]
|
|
cleaned up some typos in libpng.txt and in code documentation
|
|
fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
|
|
cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
|
|
changed recommendation about file_gamma for PC images to .51 from .45,
|
|
in example.c and libpng.txt, added comments to distinguish between
|
|
screen_gamma, viewing_gamma, and display_gamma.
|
|
changed all references to RFC1152 to read RFC1123 and changed the
|
|
PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
|
|
added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
|
|
changed srgb_intent from png_byte to int to avoid compiler bugs
|
|
version 0.99 [January 30, 1998]
|
|
free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
|
|
fixed a longstanding "packswap" bug in pngtrans.c
|
|
fixed some inconsistencies in pngconf.h that prevented compiling with
|
|
PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
|
|
fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
|
|
changed recommendation about file_gamma for PC images to .50 from .51 in
|
|
example.c and libpng.txt, and changed file_gamma for sRGB images to .45
|
|
added a number of functions to access information from the png structure
|
|
png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
|
|
added TARGET_MACOS similar to zlib-1.0.8
|
|
define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
|
|
added type casting to all png_malloc() function calls
|
|
version 0.99a [January 31, 1998]
|
|
added type casts and parentheses to all returns that return a value.(Tim W.)
|
|
|