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Diffstat (limited to 'contrib/syslinux-4.02/com32/lib/libpng/CHANGES')
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diff --git a/contrib/syslinux-4.02/com32/lib/libpng/CHANGES b/contrib/syslinux-4.02/com32/lib/libpng/CHANGES new file mode 100644 index 0000000..90a3e2b --- /dev/null +++ b/contrib/syslinux-4.02/com32/lib/libpng/CHANGES @@ -0,0 +1,2714 @@ +/* +CHANGES - 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 transformations + 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 consistent + 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 + removed png_large_malloc, png_large_free, and png_realloc functions. + +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 necessarily 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 information 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.) +version 0.99b [February 4, 1998] + Added type cast png_uint_32 on malloc function calls where needed. + Changed type of num_hist from png_uint_32 to int (same as num_palette). + Added checks for rowbytes overflow, in case png_size_t is less than 32 bits. + Renamed makefile.elf to makefile.lnx. +version 0.99c [February 7, 1998] + More type casting. Removed erroneous overflow test in pngmem.c. + Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes. + Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5. +version 0.99d [February 11, 1998] + Renamed "far_to_near()" "png_far_to_near()" + Revised libpng.3 + Version 99c "buffered" operations didn't work as intended. Replaced them + with png_memcpy_check() and png_memset_check(). + Added many "if (png_ptr == NULL) return" to quell compiler warnings about + unused png_ptr, mostly in pngget.c and pngset.c. + Check for overlength tRNS chunk present when indexed-color PLTE is read. + Cleaned up spelling errors in libpng.3/libpng.txt + Corrected a problem with png_get_tRNS() which returned undefined trans array +version 0.99e [February 28, 1998] + Corrected png_get_tRNS() again. + Add parentheses for easier reading of pngget.c, fixed "||" should be "&&". + Touched up example.c to make more of it compileable, although the entire + file still can't be compiled (Willem van Schaik) + Fixed a bug in png_do_shift() (Bryan Tsai) + Added a space in png.h prototype for png_write_chunk_start() + Replaced pngtest.png with one created with zlib 1.1.1 + Changed pngtest to report PASS even when file size is different (Jean-loup G.) + Corrected some logic errors in png_do_invert_alpha() (Chris Patterson) +version 0.99f [March 5, 1998] + Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey) + Moved makefiles into a "scripts" directory, and added INSTALL instruction file + Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok) + Added pointers to "note on libpng versions" in makefile.lnx and README + Added row callback feature when reading and writing nonprogressive rows + and added a test of this feature in pngtest.c + Added user transform callbacks, with test of the feature in pngtest.c +version 0.99g [March 6, 1998, morning] + Minor changes to pngtest.c to suppress compiler warnings. + Removed "beta" language from documentation. +version 0.99h [March 6, 1998, evening] + Minor changes to previous minor changes to pngtest.c + Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED + and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro + Added user transform capability + +version 1.00 [March 7, 1998] + Changed several typedefs in pngrutil.c + Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik) + replaced "while(1)" with "for(;;)" + added PNGARG() to prototypes in pngtest.c and removed some prototypes + updated some of the makefiles (Tom Lane) + changed some typedefs (s_start, etc.) in pngrutil.c + fixed dimensions of "short_months" array in pngwrite.c + Replaced ansi2knr.c with the one from jpeg-v6 + +version 1.0.0 [March 8, 1998] + Changed name from 1.00 to 1.0.0 (Adam Costello) + Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert) +version 1.0.0a [March 9, 1998] + Fixed three bugs in pngrtran.c to make gamma+background handling consistent + (Greg Roelofs) + Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz + for major, minor, and bugfix releases. This is 10001. (Adam Costello, + Tom Lane) + Make months range from 1-12 in png_convert_to_rfc1123 +version 1.0.0b [March 13, 1998] + Quieted compiler complaints about two empty "for" loops in pngrutil.c + Minor changes to makefile.s2x + Removed #ifdef/#endif around a png_free() in pngread.c + +version 1.0.1 [March 14, 1998] + Changed makefile.s2x to reduce security risk of using a relative pathname + Fixed some typos in the documentation (Greg). + Fixed a problem with value of "channels" returned by png_read_update_info() +version 1.0.1a [April 21, 1998] + Optimized Paeth calculations by replacing abs() function calls with intrinsics + plus other loop optimizations. Improves avg decoding speed by about 20%. + Commented out i386istic "align" compiler flags in makefile.lnx. + Reduced the default warning level in some makefiles, to make them consistent. + Removed references to IJG and JPEG in the ansi2knr.c copyright statement. + Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation. + Added grayscale and 16-bit capability to png_do_read_filler(). + Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes + too large when writing an image with bit_depth < 8 (Bob Dellaca). + Corrected some bugs in the experimental weighted filtering heuristics. + Moved a misplaced pngrutil code block that truncates tRNS if it has more + than num_palette entries -- test was done before num_palette was defined. + Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins). + Changed compiler flags in makefile.wat for better optimization (Pawel Mrochen). +version 1.0.1b [May 2, 1998] + Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg). + Relocated the png_composite macros from pngrtran.c to png.h (Greg). + Added makefile.sco (contributed by Mike Hopkirk). + Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a. + Fixed a bug in pngrtran.c that would set channels=5 under some circumstances. + More work on the Paeth-filtering, achieving imperceptible speedup (A Kleinert). + More work on loop optimization which may help when compiled with C++ compilers. + Added warnings when people try to use transforms they've defined out. + Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran. + Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg) +version 1.0.1c [May 11, 1998] + Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for + filler bytes should have been 0xff instead of 0xf. + Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images. + Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED + out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h + Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED, + for consistency, in pngconf.h + Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier + to remove unwanted capabilities via the compile line + Made some corrections to grammar (which, it's) in documentation (Greg). + Corrected example.c, use of row_pointers in png_write_image(). +version 1.0.1d [May 24, 1998] + Corrected several statements that used side effects illegally in pngrutil.c + and pngtrans.c, that were introduced in version 1.0.1b + Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert) + More corrections to example.c, use of row_pointers in png_write_image() + and png_read_rows(). + Added pngdll.mak and pngdef.pas to scripts directory, contributed by + Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5 + Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.) + Changed several loops from count-down to count-up, for consistency. +version 1.0.1e [June 6, 1998] + Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and + added warnings when people try to set png_read_fn and png_write_fn in + the same structure. + Added a test such that png_do_gamma will be done when num_trans==0 + for truecolor images that have defined a background. This corrects an + error that was introduced in libpng-0.90 that can cause gamma processing + to be skipped. + Added tests in png.h to include "trans" and "trans_values" in structures + when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined. + Add png_free(png_ptr->time_buffer) in png_destroy_read_struct() + Moved png_convert_to_rfc_1123() from pngwrite.c to png.c + Added capability for user-provided malloc_fn() and free_fn() functions, + and revised pngtest.c to demonstrate their use, replacing the + PNGTEST_DEBUG_MEM feature. + Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner). + +version 1.0.2 [June 14, 1998] + Fixed two bugs in makefile.bor . +version 1.0.2a [December 30, 1998] + Replaced and extended code that was removed from png_set_filler() in 1.0.1a. + Fixed a bug in png_do_filler() that made it fail to write filler bytes in + the left-most pixel of each row (Kevin Bracey). + Changed "static pngcharp tIME_string" to "static char tIME_string[30]" + in pngtest.c (Duncan Simpson). + Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk + even when no tIME chunk was present in the source file. + Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit. + Fixed a problem in png_read_push_finish_row(), which would not skip some + passes that it should skip, for images that are less than 3 pixels high. + Interchanged the order of calls to png_do_swap() and png_do_shift() + in pngwtran.c (John Cromer). + Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h . + Changed "bad adaptive filter type" from error to warning in pngrutil.c . + Fixed a documentation error about default filtering with 8-bit indexed-color. + Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO + (L. Peter Deutsch). + Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions. + Added png_get_copyright() and png_get_header_version() functions. + Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c + Added information about debugging in libpng.txt and libpng.3 . + Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and makefile.sco. + Removed lines after Dynamic Dependencies" in makefile.aco . + Revised makefile.dec to make a shared library (Jeremie Petit). + Removed trailing blanks from all files. +version 1.0.2a [January 6, 1999] + Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h + Added "if" tests to silence complaints about unused png_ptr in png.h and png.c + Changed "check_if_png" function in example.c to return true (nonzero) if PNG. + Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig() + which is obsolete. + +version 1.0.3 [January 14, 1999] + Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice) + Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO. +version 1.0.3a [August 12, 1999] + 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 freeing 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) + Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy. + Added some aliases for png_set_expand() in pngrtran.c, namely + png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS() + (Greg Roelofs, in "PNG: The Definitive Guide"). + Added makefile.beo for BEOS on X86, contributed by Sander Stok. +version 1.0.3b [August 26, 1999] + Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h + Changed leading blanks to tabs in all makefiles. + Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code. + 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"). Deleted the 1.0.3a aliases. + 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. +version 1.0.3d [September 4, 1999] + Fixed type casting of igamma in pngrutil.c + Added new png_expand functions to scripts/pngdef.pas and pngos2.def + Added a demo read_user_transform_fn that examines the row filters in pngtest.c + +version 1.0.4 [September 24, 1999] + Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined + Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h + Made several minor corrections to pngtest.c + Renamed the makefiles with longer but more user friendly extensions. + Copied the PNG copyright and license to a separate LICENSE file. + Revised documentation, png.h, and example.c to remove reference to + "viewing_gamma" which no longer appears in the PNG specification. + Revised pngvcrd.c to use MMX code for interlacing only on the final pass. + Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a + Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX + assembler code) and makefile.vcwin32 (doesn't). + Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING) + Added a copy of pngnow.png to the distribution. +version 1.0.4a [September 25, 1999] + Increase max_pixel_depth in pngrutil.c if a user transform needs it. + Changed several division operations to right-shifts in pngvcrd.c +version 1.0.4b [September 30, 1999] + Added parentheses in line 3732 of pngvcrd.c + Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1 +version 1.0.4c [October 1, 1999] + Added a "png_check_version" function in png.c and pngtest.c that will generate + a helpful compiler error if an old png.h is found in the search path. + Changed type of png_user_transform_depth|channels from int to png_byte. +version 1.0.4d [October 6, 1999] + Changed 0.45 to 0.45455 in png_set_sRGB() + Removed unused PLTE entries from pngnow.png + Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly. +version 1.0.4e [October 10, 1999] + Fixed sign error in pngvcrd.c (Greg Roelofs) + Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P) +version 1.0.4f [October 15, 1999] + Surrounded example.c code with #if 0 .. #endif to prevent people from + inadvertently trying to compile it. + Changed png_get_header_version() from a function to a macro in png.h + Added type casting mostly in pngrtran.c and pngwtran.c + Removed some pointless "ptr = NULL" in pngmem.c + Added a "contrib" directory containing the source code from Greg's book. + +version 1.0.5 [October 15, 1999] + Minor editing of the INSTALL and README files. +version 1.0.5a [October 23, 1999] + Added contrib/pngsuite and contrib/pngminus (Willem van Schaik) + Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans) + Further optimization and bugfix of pngvcrd.c + Revised pngset.c so that it does not allocate or free memory in the user's + text_ptr structure. Instead, it makes its own copy. + Created separate write_end_info_struct in pngtest.c for a more severe test. + Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak. +version 1.0.5b [November 23, 1999] + Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and + PNG_FLAG_WROTE_tIME from flags to mode. + Added png_write_info_before_PLTE() function. + Fixed some typecasting in contrib/gregbook/*.c + Updated scripts/makevms.com and added makevms.com to contrib/gregbook + and contrib/pngminus (Martin Zinser) +version 1.0.5c [November 26, 1999] + Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr. + Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to + accommodate making DLL's: Moved usr_png_ver from global variable to function + png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and + eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays + into pngtypes.h. Eliminated use of global png_pass arrays. Declared the + png_CHNK and png_pass arrays to be "const". Made the global arrays + available to applications (although none are used in libpng itself) when + PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined. + Removed some extraneous "-I" from contrib/pngminus/makefile.std + Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2. + Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3 +version 1.0.5d [November 29, 1999] + Add type cast (png_const_charp) two places in png.c + Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays. + Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available + to applications a macro "PNG_USE_LOCAL_ARRAYS". + Remove all the new declarations with #ifdef/#endif when + PNG_USE_GLOBAL_ARRAYS is defined. + Added PNG_EXPORT_VAR macro to accommodate making DLL's. +version 1.0.5e [November 30, 1999] + Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text + structure; refactored the inflate/deflate support to make adding new chunks + with trailing compressed parts easier in the future, and added new functions + png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP, + png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond). + NOTE: Applications that write text chunks MUST define png_text->lang + before calling png_set_text(). It must be set to NULL if you want to + write tEXt or zTXt chunks. If you want your application to be able to + run with older versions of libpng, use + + #ifdef PNG_iTXt_SUPPORTED + png_text[i].lang = NULL; + #endif + + Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned + offsets (Eric S. Raymond). + Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into + PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED + macros, leaving the separate macros also available. + Removed comments on #endifs at the end of many short, non-nested #if-blocks. +version 1.0.5f [December 6, 1999] + Changed makefile.solaris to issue a warning about potential problems when + the ucb "ld" is in the path ahead of the ccs "ld". + Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3. + Added sCAL chunk support (Eric S. Raymond). +version 1.0.5g [December 7, 1999] + Fixed "png_free_spallettes" typo in png.h + Added code to handle new chunks in pngpread.c + Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block + Added "translated_key" to png_text structure and png_write_iTXt(). + Added code in pngwrite.c to work around a newly discovered zlib bug. +version 1.0.5h [December 10, 1999] + NOTE: regarding the note for version 1.0.5e, the following must also + be included in your code: + png_text[i].translated_key = NULL; + Unknown chunk handling is now supported. + Option to eliminate all floating point support was added. Some new + fixed-point functions such as png_set_gAMA_fixed() were added. + Expanded tabs and removed trailing blanks in source files. +version 1.0.5i [December 13, 1999] + Added some type casts to silence compiler warnings. + Renamed "png_free_spalette" to "png_free_spalettes" for consistency. + Removed leading blanks from a #define in pngvcrd.c + Added some parameters to the new png_set_keep_unknown_chunks() function. + Added a test for up->location != 0 in the first instance of writing + unknown chunks in pngwrite.c + Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to + prevent recursion. + Added png_free_hIST() function. + Various patches to fix bugs in the sCAL and integer cHRM processing, + and to add some convenience macros for use with sCAL. +version 1.0.5j [December 21, 1999] + Changed "unit" parameter of png_write_sCAL from png_byte to int, to work + around buggy compilers. + Added new type "png_fixed_point" for integers that hold float*100000 values + Restored backward compatibility of tEXt/zTXt chunk processing: + Restored the first four members of png_text to the same order as v.1.0.5d. + Added members "lang_key" and "itxt_length" to png_text struct. Set + text_length=0 when "text" contains iTXt data. Use the "compression" + member to distinguish among tEXt/zTXt/iTXt types. Added + PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros. + The "Note" above, about backward incompatibility of libpng-1.0.5e, no + longer applies. + Fixed png_read|write_iTXt() to read|write parameters in the right order, + and to write the iTXt chunk after IDAT if it appears in the end_ptr. + Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs) + Reversed the order of trying to write floating-point and fixed-point gAMA. +version 1.0.5k [December 27, 1999] + Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))" + Added png_handle_as_unknown() function (Glenn) + Added png_free_chunk_list() function and chunk_list and num_chunk_list members + of png_ptr. + Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE. + Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings + about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored) + Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR). + Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is. + Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP(). +version 1.0.5l [January 1, 2000] + Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr() + for setting a callback function to handle unknown chunks and for + retrieving the associated user pointer (Glenn). +version 1.0.5m [January 7, 2000] + Added high-level functions png_read_png(), png_write_png(), png_free_pixels(). +version 1.0.5n [January 9, 2000] + Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its + own memory for info_ptr->palette. This makes it safe for the calling + application to free its copy of the palette any time after it calls + png_set_PLTE(). +version 1.0.5o [January 20, 2000] + Cosmetic changes only (removed some trailing blanks and TABs) +version 1.0.5p [January 31, 2000] + Renamed pngdll.mak to makefile.bd32 + Cosmetic changes in pngtest.c +version 1.0.5q [February 5, 2000] + Relocated the makefile.solaris warning about PATH problems. + Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg) + Revised makefile.gcmmx + Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros +version 1.0.5r [February 7, 2000] + Removed superfluous prototype for png_get_itxt from png.h + Fixed a bug in pngrtran.c that improperly expanded the background color. + Return *num_text=0 from png_get_text() when appropriate, and fix documentation + of png_get_text() in libpng.txt/libpng.3. +version 1.0.5s [February 18, 2000] + Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the + new error handler that's planned for the next libpng release, and changed + example.c, pngtest.c, and contrib programs to use this macro. + Revised some of the DLL-export macros in pngconf.h (Greg Roelofs) + Fixed a bug in png_read_png() that caused it to fail to expand some images + that it should have expanded. + Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions + in pngget.c + Changed the allocation of palette, history, and trans arrays back to + the version 1.0.5 method (linking instead of copying) which restores + backward compatibility with version 1.0.5. Added some remarks about + that in example.c. Added "free_me" member to info_ptr and png_ptr + and added png_free_data() function. + Updated makefile.linux and makefile.gccmmx to make directories conditionally. + Made cosmetic changes to pngasmrd.h + Added png_set_rows() and png_get_rows(), for use with png_read|write_png(). + Modified png_read_png() to allocate info_ptr->row_pointers only if it + hasn't already been allocated. +version 1.0.5t [March 4, 2000] + Changed png_jmp_env() migration aiding macro to png_jmpbuf(). + Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c + Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when + PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b + Files in contrib/gregbook were revised to use png_jmpbuf() and to select + a 24-bit visual if one is available, and to allow abbreviated options. + Files in contrib/pngminus were revised to use the png_jmpbuf() macro. + Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s +version 1.0.5u [March 5, 2000] + Simplified the code that detects old png.h in png.c and pngtest.c + Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp) + Increased precision of rgb_to_gray calculations from 8 to 15 bits and + added png_set_rgb_to_gray_fixed() function. + Added makefile.bc32 (32-bit Borland C++, C mode) +version 1.0.5v [March 11, 2000] + Added some parentheses to the png_jmpbuf macro definition. + Updated references to the zlib home page, which has moved to freesoftware.com. + Corrected bugs in documentation regarding png_read_row() and png_write_row(). + Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt. + Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3, + revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin) + +version 1.0.6 [March 20, 2000] + Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c + Added makefile.sggcc (SGI IRIX with gcc) +version 1.0.6d [April 7, 2000] + Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO + Added data_length parameter to png_decompress_chunk() function + Revised documentation to remove reference to abandoned png_free_chnk functions + Fixed an error in png_rgb_to_gray_fixed() + Revised example.c, usage of png_destroy_write_struct(). + Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file + Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c + Simplify png_sig_bytes() function to remove use of non-ISO-C strdup(). +version 1.0.6e [April 9, 2000] + Added png_data_freer() function. + In the code that checks for over-length tRNS chunks, added check of + info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann) + Minor revisions of libpng.txt/libpng.3. + Check for existing data and free it if the free_me flag is set, in png_set_*() + and png_handle_*(). + Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED + is defined. + Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c + and mentioned the purposes of the two macros in libpng.txt/libpng.3. +version 1.0.6f [April 14, 2000] + Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data. + Add checks in png_set_text() for NULL members of the input text structure. + Revised libpng.txt/libpng.3. + Removed superfluous prototype for png_set_itxt from png.h + Removed "else" from pngread.c, after png_error(), and changed "0" to "length". + Changed several png_errors about malformed ancillary chunks to png_warnings. +version 1.0.6g [April 24, 2000] + Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined. + Relocated paragraph about png_set_background() in libpng.3/libpng.txt + and other revisions (Matthias Benckmann) + Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and + png_ptr members to restore binary compatibility with libpng-1.0.5 + (breaks compatibility with libpng-1.0.6). +version 1.0.6h [April 24, 2000] + Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds + libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h) + This is a temporary change for test purposes. +version 1.0.6i [May 2, 2000] + Rearranged some members at the end of png_info and png_struct, to put + unknown_chunks_num and free_me within the original size of the png_structs + and free_me, png_read_user_fn, and png_free_fn within the original png_info, + because some old applications allocate the structs directly instead of + using png_create_*(). + Added documentation of user memory functions in libpng.txt/libpng.3 + Modified png_read_png so that it will use user_allocated row_pointers + if present, unless free_me directs that it be freed, and added description + of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3. + Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version + 1.00) members of png_struct and png_info, to regain binary compatibility + when you define this macro. Capabilities lost in this event + are user transforms (new in version 1.0.0),the user transform pointer + (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT, + the high-level interface, and unknown chunks support (all new in 1.0.6). + This was necessary because of old applications that allocate the structs + directly as authors were instructed to do in libpng-0.88 and earlier, + instead of using png_create_*(). + Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which + can be used to detect codes that directly allocate the structs, and + code to check these modes in png_read_init() and png_write_init() and + generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED + was not defined. + Added makefile.intel and updated makefile.watcom (Pawel Mrochen) +version 1.0.6j [May 3, 2000] + Overloaded png_read_init() and png_write_init() with macros that convert + calls to png_read_init_2() or png_write_init_2() that check the version + and structure sizes. +version 1.0.7beta11 [May 7, 2000] + Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes + which are no longer used. + Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is + defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED + is defined. + Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory + overrun when old applications fill the info_ptr->text structure directly. + Added PNGAPI macro, and added it to the definitions of all exported functions. + Relocated version macro definitions ahead of the includes of zlib.h and + pngconf.h in png.h. +version 1.0.7beta12 [May 12, 2000] + Revised pngset.c to avoid a problem with expanding the png_debug macro. + Deleted some extraneous defines from pngconf.h + Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined. + Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined. + Added png_access_version_number() function. + Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data(). + Expanded libpng.3/libpng.txt information about png_data_freer(). +version 1.0.7beta14 [May 17, 2000] (beta13 was not published) + Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as + warnings instead of errors, as pngrutil.c does. + Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png() + will actually write IDATs. + Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32. + Make png_free_data() ignore its final parameter except when freeing data + that can have multiple instances (text, sPLT, unknowns). + Fixed a new bug in png_set_rows(). + Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5. + Added png_set_invalid() function. + Fixed incorrect illustrations of png_destroy_write_struct() in example.c. +version 1.0.7beta15 [May 30, 2000] + Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce + fewer error messages. + Rearranged checks for Z_OK to check the most likely path first in pngpread.c + and pngwutil.c. + Added checks in pngtest.c for png_create_*() returning NULL, and mentioned + in libpng.txt/libpng.3 the need for applications to check this. + Changed names of png_default_*() functions in pngtest to pngtest_*(). + Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32. + Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c + Set each pointer to NULL after freeing it in png_free_data(). + Worked around a problem in pngconf.h; AIX's strings.h defines an "index" + macro that conflicts with libpng's png_color_16.index. (Dimitri Papadapoulos) + Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux). +version 1.0.7beta16 [June 4, 2000] + Revised the workaround of AIX string.h "index" bug. + Added a check for overlength PLTE chunk in pngrutil.c. + Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer + indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler. + Added a warning in png_decompress_chunk() when it runs out of data, e.g. + when it tries to read an erroneous PhotoShop iCCP chunk. + Added PNG_USE_DLL macro. + Revised the copyright/disclaimer/license notice. + Added contrib/msvctest directory +version 1.0.7rc1 [June 9, 2000] + Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200) + Added contrib/visupng directory (Willem van Schaik) +version 1.0.7beta18 [June 23, 2000] + Revised PNGAPI definition, and pngvcrd.c to work with __GCC__ + and do not redefine PNGAPI if it is passed in via a compiler directive. + Revised visupng/PngFile.c to remove returns from within the Try block. + Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros. + Updated contrib/visupng/cexcept.h to version 1.0.0. + Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks. +version 1.0.7rc2 [June 28, 2000] + Updated license to include disclaimers required by UCITA. + Fixed "DJBPP" typo in pnggccrd.c introduced in beta18. + +version 1.0.7 [July 1, 2000] + Revised the definition of "trans_values" in libpng.3/libpng.txt +version 1.0.8beta1 [July 8, 2000] + Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks. + Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and + pngwutil.c. + Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h. + Removed unused "#include <assert.h>" from png.c + Added WindowsCE support. + Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment. +version 1.0.8beta2 [July 10, 2000] + Added project files to the wince directory and made further revisions + of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE. +version 1.0.8beta3 [July 11, 2000] + Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS() + for indexed-color input files to avoid potential double-freeing trans array + under some unusual conditions; problem was introduced in version 1.0.6f. + Further revisions to pngtest.c and files in the wince subdirectory. +version 1.0.8beta4 [July 14, 2000] + Added the files pngbar.png and pngbar.jpg to the distribution. + Added makefile.cygwin, and cygwin support in pngconf.h + Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory) +version 1.0.8rc1 [July 16, 2000] + Revised png_debug() macros and statements to eliminate compiler warnings. + +version 1.0.8 [July 24, 2000] + Added png_flush() in pngwrite.c, after png_write_IEND(). + Updated makefile.hpux to build a shared library. +version 1.0.9beta1 [November 10, 2000] + Fixed typo in scripts/makefile.hpux + Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser) + Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser) + Changed "cdrom.com" in documentation to "libpng.org" + Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg). + Changed type of "params" from voidp to png_voidp in png_read|write_png(). + Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h. + Revised the 3 instances of WRITEFILE in pngtest.c. + Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory. + Updated png.rc in dll/msvc project + Revised makefile.dec to define and use LIBPATH and INCPATH + Increased size of global png_libpng_ver[] array from 12 to 18 chars. + Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const. + Removed duplicate png_crc_finish() from png_handle_bKGD() function. + Added a warning when application calls png_read_update_info() multiple times. + Revised makefile.cygwin + Fixed bugs in iCCP support in pngrutil.c and pngwutil.c. + Replaced png_set_empty_plte_permitted() with png_permit_mng_features(). +version 1.0.9beta2 [November 19, 2000] + Renamed the "dll" subdirectory "projects". + Added borland project files to "projects" subdirectory. + Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate. + Add error message in png_set_compression_buffer_size() when malloc fails. +version 1.0.9beta3 [November 23, 2000] + Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project. + Removed the png_flush() in pngwrite.c that crashes some applications + that don't set png_output_flush_fn. + Added makefile.macosx and makefile.aix to scripts directory. +version 1.0.9beta4 [December 1, 2000] + Change png_chunk_warning to png_warning in png_check_keyword(). + Increased the first part of msg buffer from 16 to 18 in png_chunk_error(). +version 1.0.9beta5 [December 15, 2000] + Added support for filter method 64 (for PNG datastreams embedded in MNG). +version 1.0.9beta6 [December 18, 2000] + Revised png_set_filter() to accept filter method 64 when appropriate. + Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to + help prevent applications from using MNG features in PNG datastreams. + Added png_permit_mng_features() function. + Revised libpng.3/libpng.txt. Changed "filter type" to "filter method". +version 1.0.9rc1 [December 23, 2000] + Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c + Fixed error handling of unknown compression type in png_decompress_chunk(). + In pngconf.h, define __cdecl when _MSC_VER is defined. +version 1.0.9beta7 [December 28, 2000] + Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places. + Revised memory management in png_set_hIST and png_handle_hIST in a backward + compatible manner. PLTE and tRNS were revised similarly. + Revised the iCCP chunk reader to ignore trailing garbage. +version 1.0.9beta8 [January 12, 2001] + Moved pngasmrd.h into pngconf.h. + Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop. +version 1.0.9beta9 [January 15, 2001] + Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to + wince and msvc project module definition files. + Minor revision of makefile.cygwin. + Fixed bug with progressive reading of narrow interlaced images in pngpread.c +version 1.0.9beta10 [January 16, 2001] + Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined. + Fixed "png_mmx_supported" typo in project definition files. +version 1.0.9beta11 [January 19, 2001] + Updated makefile.sgi to make shared library. + Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED + by default, for the benefit of DLL forward compatibility. These will + be re-enabled in version 1.2.0. +version 1.0.9rc2 [January 22, 2001] + Revised cygwin support. + +version 1.0.9 [January 31, 2001] + Added check of cygwin's ALL_STATIC in pngconf.h + Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos. +version 1.0.10beta1 [March 14, 2001] + Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc. + Reformatted libpng.3 to eliminate bad line breaks. + Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c + Added prototype for png_mmx_support() near the top of pnggccrd.c + Moved some error checking from png_handle_IHDR to png_set_IHDR. + Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros. + Revised png_mmx_support() function in pnggccrd.c + Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c + Fixed memory leak in contrib/visupng/PngFile.c + Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version) + Added warnings when retrieving or setting gamma=0. + Increased the first part of msg buffer from 16 to 18 in png_chunk_warning(). +version 1.0.10rc1 [March 23, 2001] + Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy, + and png_strlen. + Revised png_mmx_supported() function in pnggccrd.c to return proper value. + Fixed bug in progressive reading (pngpread.c) with small images (height < 8). + +version 1.0.10 [March 30, 2001] + Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin + Added beos project files (Chris Herborth) +version 1.0.11beta1 [April 3, 2001] + Added type casts on several png_malloc() calls (Dimitri Papadapoulos). + Removed a no-longer needed AIX work-around from pngconf.h + Changed several "//" single-line comments to C-style in pnggccrd.c +version 1.0.11beta2 [April 11, 2001] + Removed PNGAPI from several functions whose prototypes did not have PNGAPI. + Updated scripts/pngos2.def +version 1.0.11beta3 [April 14, 2001] + Added checking the results of many instances of png_malloc() for NULL +version 1.0.11beta4 [April 20, 2001] + Undid the changes from version 1.0.11beta3. Added a check for NULL return + from user's malloc_fn(). + Removed some useless type casts of the NULL pointer. + Added makefile.netbsd + +version 1.0.11 [April 27, 2001] + Revised makefile.netbsd +version 1.0.12beta1 [May 14, 2001] + Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot) + Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h + Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings. + Eliminated the png_error about apps using png_read|write_init(). Instead, + libpng will reallocate the png_struct and info_struct if they are too small. + This retains future binary compatibility for old applications written for + libpng-0.88 and earlier. +version 1.2.0beta1 [May 6, 2001] + Bumped DLLNUM to 2. + Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED + by default. + Added runtime selection of MMX features. + Added png_set_strip_error_numbers function and related macros. +version 1.2.0beta2 [May 7, 2001] + Finished merging 1.2.0beta1 with version 1.0.11 + Added a check for attempts to read or write PLTE in grayscale PNG datastreams. +version 1.2.0beta3 [May 17, 2001] + Enabled user memory function by default. + Modified png_create_struct so it passes user mem_ptr to user memory allocator. + Increased png_mng_features flag from png_byte to png_uint_32. + Bumped shared-library (so-number) and dll-number to 3. +version 1.2.0beta4 [June 23, 2001] + Check for missing profile length field in iCCP chunk and free chunk_data + in case of truncated iCCP chunk. + Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc + Bumped dll-number from 2 to 3 in makefile.cygwin + Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly + if user attempts to run it on an 8-bit display. + Updated contrib/gregbook + Use png_malloc instead of png_zalloc to allocate palette in pngset.c + Updated makefile.ibmc + Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes + of png_write_oFFS width and height from png_uint_32 to png_int_32. + Updated example.c + Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c +version 1.2.0beta5 [August 8, 2001] + Revised contrib/gregbook + Revised makefile.gcmmx + Revised pnggccrd.c to conditionally compile some thread-unsafe code only + when PNG_THREAD_UNSAFE_OK is defined. + Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with + value exceeding 2^bit_depth-1 + Revised makefile.sgi and makefile.sggcc + Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c + Removed restriction that do_invert_mono only operate on 1-bit opaque files + +version 1.2.0 [September 1, 2001] + Changed a png_warning() to png_debug() in pnggccrd.c + Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC(). +version 1.2.1beta1 [October 19, 2001] + Revised makefile.std in contrib/pngminus + Include background_1 in png_struct regardless of gamma support. + Revised makefile.netbsd and makefile.macosx, added makefile.darwin. + Revised example.c to provide more details about using row_callback(). +version 1.2.1beta2 [October 25, 2001] + Added type cast to each NULL appearing in a function call, except for + WINCE functions. + Added makefile.so9. +version 1.2.1beta3 [October 27, 2001] + Removed type casts from all NULLs. + Simplified png_create_struct_2(). +version 1.2.1beta4 [November 7, 2001] + Revised png_create_info_struct() and png_creat_struct_2(). + Added error message if png_write_info() was omitted. + Type cast NULLs appearing in function calls when _NO_PROTO or + PNG_TYPECAST_NULL is defined. +version 1.2.1rc1 [November 24, 2001] + Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL + is defined. + Changed typecast of "size" argument to png_size_t in pngmem.c calls to + the user malloc_fn, to agree with the prototype in png.h + Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev) + Updated makefile.sgi to recognize LIBPATH and INCPATH. + Updated various makefiles so "make clean" does not remove previous major + version of the shared library. +version 1.2.1rc2 [December 4, 2001] + Always allocate 256-entry internal palette, hist, and trans arrays, to + avoid out-of-bounds memory reference caused by invalid PNG datastreams. + Added a check for prefix_length > data_length in iCCP chunk handler. + +version 1.2.1 [December 7, 2001] + None. +version 1.2.2beta1 [February 22, 2002] + Fixed a bug with reading the length of iCCP profiles (Larry Reeves). + Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate + libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h + Revised makefile.darwin to remove "-undefined suppress" option. + Added checks for gamma and chromaticity values over 21474.83, which exceed + the limit for PNG unsigned 32-bit integers when encoded. + Revised calls to png_create_read_struct() and png_create_write_struct() + for simpler debugging. + Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK) +version 1.2.2beta2 [February 23, 2002] + Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths. + Check for invalid image dimensions in png_get_IHDR. + Added missing "fi;" in the install target of the SGI makefiles. + Added install-static to all makefiles that make shared libraries. + Always do gamma compensation when image is partially transparent. +version 1.2.2beta3 [March 7, 2002] + Compute background.gray and background_1.gray even when color_type is RGB + in case image gets reduced to gray later. + Modified shared-library makefiles to install pkgconfig/libpngNN.pc. + Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown + Removed unused png_write_destroy_info prototype from png.h + Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case + Added install-shared target to all makefiles that make shared libraries. + Stopped a double free of palette, hist, and trans when not using free_me. + Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64. +version 1.2.2beta4 [March 8, 2002] + Compute background.gray and background_1.gray even when color_type is RGB + in case image gets reduced to gray later (Jason Summers). + Relocated a misplaced /bin/rm in the "install-shared" makefile targets + Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library. +version 1.2.2beta5 [March 26, 2002] + Added missing PNGAPI to several function definitions. + Check for invalid bit_depth or color_type in png_get_IHDR(), and + check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen). + Revised iTXt support to accept NULL for lang and lang_key. + Compute gamma for color components of background even when color_type is gray. + Changed "()" to "{}" in scripts/libpng.pc.in. + Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN + Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so +version 1.2.2beta6 [March 31, 2002] +version 1.0.13beta1 [March 31, 2002] + Prevent png_zalloc() from trying to memset memory that it failed to acquire. + Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate). + Ensure that the right function (user or default) is used to free the + png_struct after an error in png_create_read_struct_2(). +version 1.2.2rc1 [April 7, 2002] +version 1.0.13rc1 [April 7, 2002] + Save the ebx register in pnggccrd.c (Sami Farin) + Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner). + Updated makefiles to put headers in include/libpng and remove old include/*.h. + +version 1.2.2 [April 15, 2002] +version 1.0.13 [April 15, 2002] + Revised description of png_set_filter() in libpng.3/libpng.txt. + Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd +version 1.0.13patch01 [April 17, 2002] +version 1.2.2patch01 [April 17, 2002] + Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and makefile.sggcc + Fixed VER -> PNGVER typo in makefile.macosx and added install-static to install + Added install: target to makefile.32sunu and makefile.64sunu +version 1.0.13patch03 [April 18, 2002] +version 1.2.2patch03 [April 18, 2002] + Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng + subdirectory to libpngNN subdirectory without the full pathname. + Moved generation of libpng.pc from "install" to "all" in 15 makefiles. +version 1.2.3rc1 [April 28, 2002] + Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos). + Added $(DESTDIR) feature to 24 makefiles (Tim Mooney) + Fixed bug with $prefix, should be $(prefix) in makefile.hpux. + Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin + Added a link from libpngNN.pc to libpng.pc in 15 makefiles. + Added links from include/libpngNN/*.h to include/*.h in 24 makefiles. + Revised makefile.darwin to make relative links without full pathname. + Added setjmp() at the end of png_create_*_struct_2() in case user forgets + to put one in their application. + Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and + removed them from module definition files. +version 1.2.3rc2 [May 1, 2002] + Fixed bug in reporting number of channels in pngget.c and pngset.c, + that was introduced in version 1.2.2beta5. + Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(), + png_default_flush(), and png_push_fill_buffer() and included them in + module definition files. + Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles. +version 1.2.3rc3 [May 1, 2002] + Revised prototype for png_default_flush() + Remove old libpng.pc and libpngNN.pc before installing new ones. +version 1.2.3rc4 [May 2, 2002] + Typos in *.def files (png_default_read|write -> png_default_read|write_data) + In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc + Added libpng-config and libpngNN-config and modified makefiles to install them. + Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles + Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp +version 1.2.3rc5 [May 11, 2002] + Changed "error" and "message" in prototypes to "error_message" and + "warning_message" to avoid namespace conflict. + Revised 15 makefiles to build libpng-config from libpng-config-*.in + Once more restored png_zalloc and png_zfree to regular nonexported form. + Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer + to nonexported form, but with PNGAPI, and removed them from module def files. +version 1.2.3rc6 [May 14, 2002] + Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c + Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp. + Removed leftover libpng-config "sed" script from four makefiles. + Revised libpng-config creating script in 16 makefiles. + +version 1.2.3 [May 22, 2002] + Revised libpng-config target in makefile.cygwin. + Removed description of png_set_mem_fn() from documentation. + Revised makefile.freebsd. + Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR). + Revised projects/msvc/README.txt + Changed -lpng to -lpngNN in LDFLAGS in several makefiles. +version 1.2.4beta1 [May 24, 2002] + Added libpng.pc and libpng-config to "all:" target in 16 makefiles. + Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH) + Added missing "\" before closing double quote in makefile.gcmmx. + Plugged various memory leaks; added png_malloc_warn() and png_set_text_2() + functions. +version 1.2.4beta2 [June 25, 2002] + Plugged memory leak of png_ptr->current_text (Matt Holgate). + Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison) + Added -soname to the loader flags in makefile.dec, makefile.sgi, and + makefile.sggcc. + Added "test-installed" target to makefile.linux, makefile.gcmmx, + makefile.sgi, and makefile.sggcc. +version 1.2.4beta3 [June 28, 2002] + Plugged memory leak of row_buf in pngtest.c when there is a png_error(). + Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data. + Added "test-installed" target to makefile.32sunu, makefile.64sunu, + makefile.beos, makefile.darwin, makefile.dec, makefile.macosx, + makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9. +version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002] + Added "test-installed" target to makefile.cygwin and makefile.sco. + Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro. + +version 1.2.4 and 1.0.14 [July 8, 2002] + Changed png_warning() to png_error() when width is too large to process. +version 1.2.4patch01 [July 20, 2002] + Revised makefile.cygwin to use DLL number 12 instead of 13. +version 1.2.5beta1 [August 6, 2002] + Added code to contrib/gregbook/readpng2.c to ignore unused chunks. + Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11) + Removed some stray *.o files from contrib/gregbook. + Changed png_error() to png_warning() about "Too much data" in pngpread.c + and about "Extra compressed data" in pngrutil.c. + Prevent png_ptr->pass from exceeding 7 in png_push_finish_row(). + Updated makefile.hpgcc + Updated png.c and pnggccrd.c handling of return from png_mmx_support() +version 1.2.5beta2 [August 15, 2002] + Only issue png_warning() about "Too much data" in pngpread.c when avail_in + is nonzero. + Updated makefiles to install a separate libpng.so.3 with its own rpath. +version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002] + Revised makefiles to not remove previous minor versions of shared libraries. +version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002] + Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared + library loader directive. + Added missing "$OBJSDLL" line to makefile.gcmmx. + Added missing "; fi" to makefile.32sunu. +version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002] + Revised libpng-config script. + +version 1.2.5 and 1.0.15 [October 3, 2002] + Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux, + and makefile.aix. + Relocated two misplaced PNGAPI lines in pngtest.c +version 1.2.6beta1 [October 22, 2002] + Commented out warning about uninitialized mmx_support in pnggccrd.c. + Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h. + Relocated two more misplaced PNGAPI lines in pngtest.c + Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams, + introduced in version 1.0.2. + Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu. +version 1.2.6beta2 [November 1, 2002] + Added libpng-config "--ldopts" output. + Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)" + in makefiles. +version 1.2.6beta3 [July 18, 2004] + Reverted makefile changes from version 1.2.6beta2 and some of the changes + from version 1.2.6beta1; these will be postponed until version 1.2.7. + Version 1.2.6 is going to be a simple bugfix release. + Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile. + Fixed potential overrun in pngerror.c by using strncpy instead of memcpy. + Added "#!/bin/sh" at the top of configure, for recognition of the + 'x' flag under Cygwin (Cosmin). + Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin). + Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin). + Fixed the special memory handler for Borland C under DOS, in pngmem.c + (Cosmin). + Removed some spurious assignments in pngrutil.c (Cosmin). + Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings + on 16-bit platforms (Cosmin). + Enclosed shift op expressions in parentheses, to silence warnings (Cosmin). + Used proper type png_fixed_point, to avoid problems on 16-bit platforms, + in png_handle_sRGB() (Cosmin). + Added compression_type to png_struct, and optimized the window size + inside the deflate stream (Cosmin). + Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin). + Fixed handling of unknown chunks that come after IDAT (Cosmin). + Allowed png_error() and png_warning() to work even if png_ptr == NULL + (Cosmin). + Replaced row_info->rowbytes with row_bytes in png_write_find_filter() + (Cosmin). + Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre). + Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded + values in png.c (Simon-Pierre, Cosmin). + Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre). + Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc + (Simon-Pierre). + Moved the definition of PNG_HEADER_VERSION_STRING near the definitions + of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin). + Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin). + Updated scripts/makefile.vc(a)win32 (Cosmin). + Updated the MSVC project (Simon-Pierre, Cosmin). + Updated the Borland C++ Builder project (Cosmin). + Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin). + Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin). + Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin). + Added extra guard around inclusion of Turbo C memory headers, in pngconf.h + (Cosmin). + Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to + projects/cbuilder5/ (Cosmin). + Moved projects/visualc6/png32ms.def to scripts/pngw32.def, + and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin). + Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin). + Changed line endings to DOS style in cbuilder5 and visualc6 files, even + in the tar.* distributions (Cosmin). + Updated contrib/visupng/VisualPng.dsp (Cosmin). + Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin). + Added a separate distribution with "configure" and supporting files (Junichi). +version 1.2.6beta4 [July 28, 2004] + Added user ability to change png_size_t via a PNG_SIZE_T macro. + Added png_sizeof() and png_convert_size() functions. + Added PNG_SIZE_MAX (maximum value of a png_size_t variable. + Added check in png_malloc_default() for (size_t)size != (png_uint_32)size + which would indicate an overflow. + Changed sPLT failure action from png_error to png_warning and abandon chunk. + Changed sCAL and iCCP failures from png_error to png_warning and abandon. + Added png_get_uint_31(png_ptr, buf) function. + Added PNG_UINT_32_MAX macro. + Renamed PNG_MAX_UINT to PNG_UINT_31_MAX. + Made png_zalloc() issue a png_warning and return NULL on potential + overflow. + Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x + Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4. + Revised Borland portion of png_malloc() to return NULL or issue + png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK. + Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove + sequential read support. + Added some "#if PNG_WRITE_SUPPORTED" blocks. + Removed some redundancy with #ifdef/#endif in png_malloc_default(). + Use png_malloc instead of png_zalloc to allocate the pallete. +version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004] + Fixed buffer overflow vulnerability in png_handle_tRNS() + Fixed integer arithmetic overflow vulnerability in png_read_png(). + Fixed some harmless bugs in png_handle_sBIT, etc, that would cause + duplicate chunk types to go undetected. + Fixed some timestamps in the -config version + Rearranged order of processing of color types in png_handle_tRNS(). + Added ROWBYTES macro to calculate rowbytes without integer overflow. + Updated makefile.darwin and removed makefile.macosx from scripts directory. + Imposed default one million column, one-million row limits on the image + dimensions, and added png_set_user_limits() function to override them. + Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro. + Fixed wrong cast of returns from png_get_user_width|height_max(). + Changed some "keep the compiler happy" from empty statements to returns, + Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution +version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004] + Revised makefile.darwin and makefile.solaris. Removed makefile.macosx. + Revised pngtest's png_debug_malloc() to use png_malloc() instead of + png_malloc_default() which is not supposed to be exported. + Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in + pngpread.c. Bug was introduced in 1.2.6rc1. + Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1. + Fixed old bug in RGB to Gray transformation. + Fixed problem with 64-bit compilers by casting arguments to abs() + to png_int_32. + Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9). + Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin) + Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles. + Added code to update the row_info->colortype in png_do_read_filler() (MSB). +version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004] + Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid + trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro. + Revised documentation of png_set_keep_unknown_chunks(). + Check handle_as_unknown status in pngpread.c, as in pngread.c previously. + Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h + Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c +version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004] + Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of + "pinfo" was out of place). +version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004] + Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED + section of png.h where they were inadvertently placed in version rc3. + +version 1.2.6 and 1.0.16 [August 15, 2004] + Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1. +version 1.2.7beta1 [August 26, 2004] + Removed unused pngasmrd.h file. + Removed references to uu.net for archived files. Added references to + PNG Spec (second edition) and the PNG ISO/IEC Standard. + Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR. + Fixed bug with "optimized window size" in the IDAT datastream, that + causes libpng to write PNG files with incorrect zlib header bytes. +version 1.2.7beta2 [August 28, 2004] + Fixed bug with sCAL chunk and big-endian machines (David Munro). + Undid new code added in 1.2.6rc2 to update the color_type in + png_set_filler(). + Added png_set_add_alpha() that updates color type. +version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004] + Revised png_set_strip_filler() to not remove alpha if color_type has alpha. + +version 1.2.7 and 1.0.17 [September 12, 2004] + Added makefile.hp64 + Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin +version 1.2.8beta1 [November 1, 2004] + Fixed bug in png_text_compress() that would fail to complete a large block. + Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during + strip alpha operation in png_do_strip_filler(). + Added PNG_1_2_X definition in pngconf.h + Comment out with #ifdef/#endif png_info_init in png.c and png_read_init + in pngread.c (as of 1.3.0) +version 1.2.8beta2 [November 2, 2004] + Reduce color_type to a nonalpha type after strip alpha operation in + png_do_strip_filler(). +version 1.2.8beta3 [November 3, 2004] + Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM +version 1.2.8beta4 [November 12, 2004] + Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin). + Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin). + Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection + of data type in deflate (Cosmin). + Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of + PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING. +version 1.2.8beta5 [November 20, 2004] + Use png_ptr->flags instead of png_ptr->transformations to pass + PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI + compatibility. + Revised handling of SPECIALBUILD, PRIVATEBUILD, + PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING. +version 1.2.8rc1 [November 24, 2004] + Moved handling of BUILD macros from pngconf.h to png.h + Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently + omitted from beta5. + Revised scripts/pngw32.rc + Despammed mailing addresses by masking "@" with "at". + Inadvertently installed a supposedly faster test version of pngrutil.c +version 1.2.8rc2 [November 26, 2004] + Added two missing "\" in png.h + Change tests in pngread.c and pngpread.c to + if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA)) + png_do_read_transformations(png_ptr); +version 1.2.8rc3 [November 28, 2004] + Reverted pngrutil.c to version libpng-1.2.8beta5. + Added scripts/makefile.elf with supporting code in pngconf.h for symbol + versioning (John Bowler). +version 1.2.8rc4 [November 29, 2004] + Added projects/visualc7 (Simon-pierre). +version 1.2.8rc5 [November 29, 2004] + Fixed new typo in scripts/pngw32.rc + +version 1.2.8 [December 3, 2004] + Removed projects/visualc7, added projects/visualc71. + +version 1.2.9beta1 [February 21, 2006] + + Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints + Revised man page and libpng.txt to make it clear that one should not call + png_read_end or png_write_end after png_read_png or png_write_png. + Updated references to png-mng-implement mailing list. + Fixed an incorrect typecast in pngrutil.c + Added PNG_NO_READ_SUPPORTED conditional for making a write-only library. + Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional. + Optimized alpha-inversion loops in pngwtran.c + Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c + Make sure num_trans is <= 256 before copying data in png_set_tRNS(). + Make sure num_palette is <= 256 before copying data in png_set_PLTE(). + Interchanged order of write_swap_alpha and write_invert_alpha transforms. + Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin). + Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin). + Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin). + Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16, + png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin). + Added type cast (png_byte) in png_write_sCAL() (Cosmin). + Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin). + Default iTXt support was inadvertently enabled. + +version 1.2.9beta2 [February 21, 2006] + + Check for png_rgb_to_gray and png_gray_to_rgb read transformations before + checking for png_read_dither in pngrtran.c + Revised checking of chromaticity limits to accommodate extended RGB + colorspace (John Denker). + Changed line endings in some of the project files to CRLF, even in the + "Unix" tar distributions (Cosmin). + Made png_get_int_32 and png_save_int_32 always available (Cosmin). + Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def + with the newly exported functions. + Eliminated distributions without the "configure" script. + Updated INSTALL instructions. + +version 1.2.9beta3 [February 24, 2006] + + Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp + Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler) + Removed reference to pngasmrd.h from Makefile.am + Renamed CHANGES to ChangeLog. + Renamed LICENSE to COPYING. + Renamed ANNOUNCE to NEWS. + Created AUTHORS file. + +version 1.2.9beta4 [March 3, 2006] + + Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac + Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING. + Removed newline from the end of some error and warning messages. + Removed test for sqrt() from configure.ac and configure. + Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix). + Disabled default iTXt support that was inadvertently enabled in + libpng-1.2.9beta1. + Added "OS2" to list of systems that don't need underscores, in pnggccrd.c + Removed libpng version and date from *.c files. + +version 1.2.9beta5 [March 4, 2006] + Removed trailing blanks from source files. + Put version and date of latest change in each source file, and changed + copyright year accordingly. + More cleanup of configure.ac, Makefile.ac, and associated scripts. + Restored scripts/makefile.elf which was inadvertently deleted. + +version 1.2.9beta6 [March 6, 2006] + Fixed typo (RELEASE) in configuration files. + +version 1.2.9beta7 [March 7, 2006] + Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am + Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s() + in png.h. + Updated makefile.elf as suggested by debian. + Made cosmetic changes to some makefiles, adding LN_SF and other macros. + Made some makefiles accept "exec_prefix". + +version 1.2.9beta8 [March 9, 2006] + Fixed some "#if defined (..." which should be "#if defined(..." + Bug introduced in libpng-1.2.8. + Fixed inconsistency in definition of png_default_read_data() + Restored blank that was lost from makefile.sggcc "clean" target in beta7. + Revised calculation of "current" and "major" for irix in ltmain.sh + Changed "mkdir" to "MKDIR_P" in some makefiles. + Separated PNG_EXPAND and PNG_EXPAND_tRNS. + Added png_set_expand_gray_1_2_4_to_8() and deprecated + png_set_gray_1_2_4_to_8() which also expands tRNS to alpha. + +version 1.2.9beta9 [March 10, 2006] + Include "config.h" in pngconf.h when available. + Added some checks for NULL png_ptr or NULL info_ptr (timeless) + +version 1.2.9beta10 [March 20, 2006] + Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin) + Made pnggccrd.c PIC-compliant (Christian Aichinger). + Added makefile.mingw (Wolfgang Glas). + Revised pngconf.h MMX checking. + +version 1.2.9beta11 [March 22, 2006] + Fixed out-of-order declaration in pngwrite.c that was introduced in beta9 + Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros. + +version 1.2.9rc1 [March 31, 2006] + Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin). + Removed nonsensical assertion check from pngtest.c (Cosmin). + +version 1.2.9 [April 14, 2006] + Revised makefile.beos and added "none" selector in ltmain.sh + +version 1.2.10beta1 [April 15, 2006] + Renamed "config.h" to "png_conf.h" and revised Makefile.am to add + -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h + to include png_conf.h only when PNG_BUILDING_LIBPNG is defined. + +version 1.2.10beta2 [April 15, 2006] + Manually updated Makefile.in and configure. Changed png_conf.h.in + back to config.h. + +version 1.2.10beta3 [April 15, 2006] + Change png_conf.h back to config.h in pngconf.h. + +version 1.2.10beta4 [April 16, 2006] + Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*. + +version 1.2.10beta5 [April 16, 2006] + Added a configure check for compiling assembler code in pnggccrd.c + +version 1.2.10beta6 [April 17, 2006] + Revised the configure check for pnggccrd.c + Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@ + Added @LIBPNG_DEFINES@ to arguments when building libpng.sym + +version 1.2.10beta7 [April 18, 2006] + Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles. + +version 1.2.10rc1 [April 19, 2006] + Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD + Fixed "LN_FS" typo in makefile.sco and makefile.solaris. + +version 1.2.10rc2 [April 20, 2006] + Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE + in configure.ac and configure + Made the configure warning about versioned symbols less arrogant. + +version 1.2.10rc3 [April 21, 2006] + Added a note in libpng.txt that png_set_sig_bytes(8) can be used when + writing an embedded PNG without the 8-byte signature. + Revised makefiles and configure to avoid making links to libpng.so.* + +version 1.2.10 [April 23, 2006] + Reverted configure to "rc2" state. + +version 1.2.11beta1 [May 31, 2006] + scripts/libpng.pc.in contained "configure" style version info and would + not work with makefiles. + The shared-library makefiles were linking to libpng.so.0 instead of + libpng.so.3 compatibility as the library. + +version 1.2.11beta2 [June 2, 2006] + Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid + buffer overflow. + Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb) + +version 1.2.11beta3 [June 5, 2006] + Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin). + Removed the accidental leftover Makefile.in~ (Cosmin). + Avoided potential buffer overflow and optimized buffer in + png_write_sCAL(), png_write_sCAL_s() (Cosmin). + Removed the include directories and libraries from CFLAGS and LDFLAGS + in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin). + +version 1.2.11beta4 [June 6, 2006] + Allow zero-length IDAT chunks after the entire zlib datastream, but not + after another intervening chunk type. + +version 1.0.19rc1, 1.2.11rc1 [June 13, 2006] + Deleted extraneous square brackets from [config.h] in configure.ac + +version 1.0.19rc2, 1.2.11rc2 [June 14, 2006] + Added prototypes for PNG_INCH_CONVERSIONS functions to png.h + Revised INSTALL and autogen.sh + Fixed typo in several makefiles (-W1 should be -Wl) + Added typedef for png_int_32 and png_uint_32 on 64-bit systems. + +version 1.0.19rc3, 1.2.11rc3 [June 15, 2006] + Removed the new typedefs for 64-bit systems (delay until version 1.4.0) + Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid + reading out of bounds. + +version 1.0.19rc4, 1.2.11rc4 [June 15, 2006] + Really removed the new typedefs for 64-bit systems. + +version 1.0.19rc5, 1.2.11rc5 [June 22, 2006] + Removed png_sig_bytes entry from scripts/pngw32.def + +version 1.0.19, 1.2.11 [June 26, 2006] + None. + +version 1.0.20, 1.2.12 [June 27, 2006] + Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid + buffer overflow. + +version 1.2.13beta1 [October 2, 2006] + Removed AC_FUNC_MALLOC from configure.ac + Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h + Change "logical" to "bitwise" throughout documentation. + Detect and fix attempt to write wrong iCCP profile length. + +version 1.0.21, 1.2.13 [November 14, 2006] + Fix potential buffer overflow in sPLT chunk handler. + Fix Makefile.am to not try to link to noexistent files. + Check all exported functions for NULL png_ptr. + +version 1.2.14beta1 [November 17, 2006] + Relocated three misplaced tests for NULL png_ptr. + Built Makefile.in with automake-1.9.6 instead of 1.9.2. + Build configure with autoconf-2.60 instead of 2.59 + +version 1.2.14beta2 [November 17, 2006] + Added some typecasts in png_zalloc(). + +version 1.2.14rc1 [November 20, 2006] + Changed "strtod" to "png_strtod" in pngrutil.c + +version 1.0.22, 1.2.14 [November 27, 2006] + Added missing "$(srcdir)" in Makefile.am and Makefile.in + +version 1.2.15beta1 [December 3, 2006] + Generated configure with autoconf-2.61 instead of 2.60 + Revised configure.ac to update libpng.pc and libpng-config. + +version 1.2.15beta2 [December 3, 2006] + Always export MMX asm functions, just stubs if not building pnggccrd.c + +version 1.2.15beta3 [December 4, 2006] + Add "png_bytep" typecast to profile while calculating length in pngwutil.c + +version 1.2.15beta4 [December 7, 2006] + Added scripts/CMakeLists.txt + Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta + +version 1.2.15beta5 [December 7, 2006] + Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c + Revised scripts/CMakeLists.txt + +version 1.2.15beta6 [December 13, 2006] + Revised scripts/CMakeLists.txt and configure.ac + +version 1.2.15rc1 [December 18, 2006] + Revised scripts/CMakeLists.txt + +version 1.2.15rc2 [December 21, 2006] + Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers. + Added scripts/makefile.nommx + +version 1.2.15rc3 [December 25, 2006] + Fixed shared library numbering error that was introduced in 1.2.15beta6. + +version 1.2.15rc4 [December 27, 2006] + Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set. + +version 1.2.15rc5 [December 31, 2006] + Revised handling of rgb_to_gray. + +version 1.0.23, 1.2.15 [January 5, 2007] + Added some (unsigned long) typecasts in pngtest.c to avoid printing errors. + +version 1.2.16beta1 [January 6, 2007] + Fix bugs in makefile.nommx + +version 1.2.16beta2 [January 16, 2007] + Revised scripts/CMakeLists.txt + +version 1.0.24, 1.2.16 [January 31, 2007] + No changes. + +version 1.2.17beta1 [March 6, 2007] + Revised scripts/CMakeLists.txt to install both shared and static libraries. + Deleted a redundant line from pngset.c. + +version 1.2.17beta2 [April 26, 2007] + Relocated misplaced test for png_ptr == NULL in pngpread.c + Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN + flags. + Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_* + Added pngerror() when write_IHDR fails in deflateInit2(). + Added "const" to some array declarations. + Mention examples of libpng usage in the libpng*.txt and libpng.3 documents. + +version 1.2.17rc1 [May 4, 2007] + No changes. + +version 1.2.17rc2 [May 8, 2007] + Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications + calling set_unknown_chunk_location() need them. + Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in + png_set_expand_gray_1_2_4_to_8(). + Added png_ptr->unknown_chunk to hold working unknown chunk data, so it + can be free'ed in case of error. Revised unknown chunk handling in + pngrutil.c and pngpread.c to use this structure. + +version 1.2.17rc3 [May 8, 2007] + Revised symbol-handling in configure script. + +version 1.2.17rc4 [May 10, 2007] + Revised unknown chunk handling to avoid storing unknown critical chunks. + +version 1.0.25 [May 15, 2007] +version 1.2.17 [May 15, 2007] + Added "png_ptr->num_trans=0" before error return in png_handle_tRNS, + to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664) + +version 1.0.26 [May 15, 2007] +version 1.2.18 [May 15, 2007] + Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script + +version 1.2.19beta1 [May 18, 2007] + Changed "const static" to "static PNG_CONST" everywhere, mostly undoing + change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST" + Changed some handling of unused parameters, to avoid compiler warnings. + "if (unused == NULL) return;" becomes "unused = unused". + +version 1.2.19beta2 [May 18, 2007] + Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier) + +version 1.2.19beta3 [May 19, 2007] + Add some "png_byte" typecasts in png_check_keyword() and write new_key + instead of key in zTXt chunk (Kevin Ryde). + +version 1.2.19beta4 [May 21, 2007] + Add png_snprintf() function and use it in place of sprint() for improved + defense against buffer overflows. + +version 1.2.19beta5 [May 21, 2007] + Fixed png_handle_tRNS() to only use the valid bits of tRNS value. + Changed handling of more unused parameters, to avoid compiler warnings. + Removed some PNG_CONST in pngwutil.c to avoid compiler warnings. + +version 1.2.19beta6 [May 22, 2007] + Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c + Added a special "_MSC_VER" case that defines png_snprintf to _snprintf + +version 1.2.19beta7 [May 22, 2007] + Squelched png_squelch_warnings() in pnggccrd.c and added + an #ifdef PNG_MMX_CODE_SUPPORTED/#endif block around the declarations + that caused the warnings that png_squelch_warnings was squelching. + +version 1.2.19beta8 [May 22, 2007] + Removed __MMX__ from test in pngconf.h. + +version 1.2.19beta9 [May 23, 2007] + Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro. + Revised png_squelch_warnings() so it might work. + Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86. + +version 1.2.19beta10 [May 24, 2007] + Resquelched png_squelch_warnings(), use "__attribute__((used))" instead. + +version 1.2.19beta11 [May 28, 2007] + Return 0 from png_get_sPLT() and png_get_unknown_chunks() if png_ptr is NULL; + changed three remaining instances of png_strcpy() to png_strncpy() (David + Hill). + Make test for NULL row_buf at the beginning of png_do_read_transformations + unconditional. + +version 1.2.19beta12 [May 28, 2007] + Revised pnggccrd.c. + +version 1.2.19beta13 [June 14, 2007] + Prefer PNG_USE_PNGVCRD when _MSC_VER is defined in pngconf.h + +version 1.2.19beta14 [June 16, 2007] + Fix bug with handling of 16-bit transparency, introduced in 1.2.19beta2 + +version 1.2.19beta15 [June 17, 2007] + Revised pnggccrd.c. + +version 1.2.19beta16 [June 18, 2007] + Revised pnggccrd.c again. + Updated contrib/gregbook. + Changed '#include "pnggccrd.c"' to 'include "$srcdir/pnggccrd.c"' + in configure.ac + +version 1.2.19beta17 [June 19, 2007] + Revised many of the makefiles, to set -DPNG_NO_MMX_CODE where needed + and to not use -O3 unless -DPNG_NO_MMX_CODE is also set. + +version 1.2.19beta18 [June 23, 2007] + Replaced some C++ style comments with C style comments in pnggccrd.c. + Copied optimized C code from pnggccrd.c to pngrutil.c, removed dependency + on pnggccrd.o from many makefiles. + Added sl and dylib to list of extensions be installed by Makefile.am + +version 1.2.19beta19 [June 28, 2007] + Fixed testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN in pngrtran.c + More cleanup of pnggccrd.c and pngvcrd.c + +version 1.2.19beta20 [June 29, 2007] + Rebuilt Makefile.in and configure using libtool-1.5.24. + Fixed typo in pnggccrd.c + +version 1.2.19beta21 [June 30, 2007] + More revision of pnggccrd.c + Added "test" target to Makefile.in and Makefile.am + +version 1.2.19beta22 [July 3, 2007] + Added info about pngrutil/pnggccrd/pngvcrd to png_get_header_version() + Fix type definition of dummy_value_a, b in pnggccrd.c + +version 1.2.19beta23 [July 10, 2007] + Revert change to type definition of dummy_value_a, b in pnggccrd.c + Make sure __PIC__ is defined in pnggccrd.c when PIC is defined. + Require gcc-4.1 or better to use PNG_HAVE_MMX_FILTER_ROW on x86_64 platforms + +version 1.2.19beta24 [July 14, 2007] + Added PNG_NO_READ_FILTER, PNG_NO_WRITE_FILTER, PNG_NO_WARNING macros. + Added contrib/pngminim to demonstrate building minimal encoder and decoder + +version 1.2.19beta25 [July 15, 2007] + Removed the new PNG_NO_READ_FILTER macro since it would make the library + unable to read valid PNG files, and filtering is at the heart of the + PNG format. + +version 1.2.19beta26 [July 16, 2007] + Changed "png_free(str)" to "png_free(png_ptr,str)" in pngrutil.c WinCE + code (Yves Piguet). This bug was introduced in libpng-1.2.14. + Updated scripts/CMakeLists.txt + Relocated a misplaced #endif in pnggccrd.c + +version 1.2.19beta27 [July 17, 2007] + Fixed incorrect stride and number of bytes copied (was 4 instead of + 6 bytes) in the cleanup loop of pnggccrd.c and pngvcrd.c for handling + the end of 48-bit interlaced rows (Glenn R-P). + +version 1.2.19beta28 [July 19, 2007] + Removed requirement for gcc-4.1 or better to use PNG_HAVE_MMX_FILTER_ROW + on x86_64 platforms + Added png_warning() in pngrutil.c for short iCCP, iTXt, sPLT, or zTXT chunks. + Revised pngtest.c so warnings are displayed regardless of PNG_NO_STDIO. + +version 1.2.19beta29 [July 20, 2007] + Fix typo in pnggccrd.c (%%eax should be %%ax in secondloop48) + +version 1.2.19beta30 [July 26, 2007] + Revised pnggccrd.c + +version 1.2.19beta31 [July 27, 2007] + Fix typos in pnggccrd.c + +version 1.0.27rc1 and 1.2.19rc1 [July 31, 2007] + Disable PNG_MMX_CODE_SUPPORTED when PNG_ASSEMBLER_CODE_SUPPORTED is off. + Enable PNG_MMX_READ_FILTER_* by default, except when gcc-3.x is being + used (they were inadvertently disabled in libpng-1.2.19beta23). + Fix some debugging statements in pnggccrd.c and pngrutil.c + Added information about disabling the MMX code in libpng documentation. + +version 1.0.27rc2 and 1.2.19rc2 [August 4, 2007] + Removed some "#if 0" blocks. + Made a global struct local in pngvcrd.c to make it thread safe. + Issue a png_error() if application attempts to transform a row tht + has not been initialized. + +version 1.0.27rc3 and 1.2.19rc3 [August 9, 2007] + Slightly revised pngvcrd.c + +version 1.0.27rc4 and 1.2.19rc4 [August 9, 2007] + Revised pnggccrd.c debugging change of rc1, which was broken. + Revised scripts/CMakeLists.txt + Change default to PNG_NO_GLOBAL_ARRAYS for MSVC. + Turn off PNG_FLAG_ROW_INIT flag when setting transforms that expand pixels. + +version 1.0.27rc5 and 1.2.19rc5 [August 10, 2007] + Fix typo (missing '"') in pnggccrd.c + Revise handling of png_strtod in recent versions of WINCE + +version 1.0.27rc6 and 1.2.19rc6 [August 15, 2007] + Fix typo (missing ',') in contrib/gregbook/readpng2.c + Undid row initialization error exit added to rc2 and rc4. + +version 1.0.27 and 1.2.19 [August 18, 2007] + Conditionally restored row initialization error exit. + +version 1.2.20beta01 [August 19, 2007] + Fixed problem with compiling pnggccrd.c on Intel-Apple platforms. + Changed png_malloc() to png_malloc_warn() in png_set_sPLT(). + Added PNG_NO_ERROR_TEXT feature, with demo in contrib/pngminim + Removed define PNG_WARN_UNINITIALIZED_ROW 1 /* 0: warning; 1: error */ + because it caused some trouble. + +version 1.2.20beta02 [August 20, 2007] + Avoid compiling pnggccrd.c on Intel-Apple platforms. + +version 1.2.20beta03 [August 20, 2007] + Added "/D PNG_NO_MMX_CODE" to the non-mmx builds of projects/visualc6 + and visualc71. + +version 1.2.20beta04 [August 21, 2007] + Revised pngvcrd.c for improved efficiency (Steve Snyder). + +version 1.2.20rc1 [August 23, 2007] + Revised pngconf.h to set PNG_NO_MMX_CODE for gcc-3.x compilers. + +version 1.2.20rc2 [August 27, 2007] + Revised scripts/CMakeLists.txt + Revised #ifdefs to ensure one and only one of pnggccrd.c, pngvcrd.c, + or part of pngrutil.c is selected. + +version 1.2.20rc3 [August 30, 2007] + Remove a little more code in pngwutil.c when PNG_NO_WRITE_FILTER is selected. + Added /D _CRT_SECURE_NO_WARNINGS to visual6c and visualc71 projects. + Compile png_mmx_support() in png.c even when PNG_NO_MMX_CODE is defined. + Restored a "superfluous" #ifdef that was removed from 1.2.20rc2 pnggccrd.c, + breaking the png_mmx_support() function. + +version 1.2.20rc4 [September 1, 2007] + Removed Intel contributions (MMX, Optimized C). + +version 1.2.20rc5 [September 2, 2007] + Restored configure and Makefile.in to rc3 and put a snippet of code in + pnggccrd.c, to ensure configure makes the same PNG_NO_MMX_CODE selection + +version 1.2.20rc6 [September 2, 2007] + Fixed bugs in scripts/CMakeLists.txt + Removed pngvcrd.c references from msvc projects. + +version 1.0.28 and 1.2.20 [September 8, 2007] + Removed "(NO READ SUPPORT)" from png_get_header_version() string. + +version 1.2.21beta1 [September 14, 2007] + Fixed various mistakes reported by George Cook and Jeff Phillips: + logical vs bitwise NOT in pngrtran.c, bug introduced in 1.2.19rc2 + 16-bit cheap transparency expansion, bug introduced in 1.2.19beta2 + errors with sizeof(unknown_chunk.name), bugs introduced in 1.2.19beta11 + <= compare with unsigned var in pngset.c, should be ==. + +version 1.2.21beta2 [September 18, 2007] + Removed some extraneous typecasts. + +version 1.2.21rc1 [September 25, 2007] + Fixed potential out-of-bounds reads in png_handle_pCAL() and + png_handle_ztXt() ("flayer" results reported by Tavis Ormandy). + +version 1.2.21rc2 [September 26, 2007] + Fixed potential out-of-bounds reads in png_handle_sCAL(), + png_handle_iTXt(), and png_push_read_tEXt(). + Remove some PNG_CONST declarations from pngwutil.c to avoid compiler warnings + Revised makefiles to update paths in libpng.pc properly. + +version 1.2.21rc3 [September 27, 2007] + Revised makefiles to update "Libs" in libpng.pc properly. + +version 1.0.29 and 1.2.21rc3 [October 4, 2007] + No changes. + +version 1.2.22beta1 [October 4, 2007] + Again, fixed logical vs bitwise NOT in pngrtran.c, bug introduced + in 1.2.19rc2 + +version 1.2.22beta2 [October 5, 2007] + Fixed string length error in pngset.c (caused crashes while decoding iCCP) + Add terminating NULL after each instance of png_strncpy(). + +version 1.2.22beta3 [October 6, 2007] + Fix two off-by-one terminating NULL after png_strncpy(). + +version 1.2.22beta4 [October 7, 2007] + Changed some 0 to '\0'. + +version 1.0.30rc1 and 1.2.22rc1 [October 8, 2007] + No changes. + +version 1.0.30 and 1.2.22 [October 13, 2007] + No changes. + +version 1.2.23beta01 [October 15, 2007] + Reduced number of invocations of png_strlen() in pngset.c. + Changed [azAZ09_] to [_abcde...89] in Makefile.am for better localization. + +version 1.2.23beta02 [October 16, 2007] + Eliminated png_strncpy() and png_strcpy() (Pierre Poissinger) + Changed $AN to $(AN) in Makefile.am. + +version 1.2.23beta03 [October 16, 2007] + Fixed off-by-one error in pngset.c + Restore statement to set last character of buffer to \0 in pngerror.c + +version 1.2.23beta04 [October 23, 2007] + Reject attempt to set all-zero cHRM values. + +version 1.2.23beta05 [October 26, 2007] + Add missing quotes in projects/visualc6, lost in version 1.2.20rc3 + +version 1.2.23rc01 [November 2, 2007] + No changes. + +version 1.2.23 [November 6, 2007] + No changes. + +version 1.2.24beta01 [November 19, 2007] + Moved misplaced test for malloc failure in png_set_sPLT(). This bug was + introduced in libpng-1.2.20beta01. + Ifdef out avg_row etc from png.h and pngwrite.c when PNG_NO_WRITE_FILTER + Do not use png_ptr->free_fn and png_ptr->mem_fn in png_destroy_read_struct() + when png_ptr is NULL (Marshall Clow). + Updated handling of symbol prefixes in Makefile.am and configure.ac (Mike + Frysinger). + +version 1.2.24beta02 [November 30, 2007] + Removed a useless test and fixed incorrect test in png_set_cHRM_fixed() + (David Hill). + +version 1.2.24rc01 [December 7, 2007] + No changes. + +version 1.2.24 [December 14, 2007] + Make sure not to redefine _BSD_SOURCE in pngconf.h + Revised gather.sh and makefile.std in contrib/pngminim to avoid compiling + unused files. + +version 1.2.25beta01 [January 7, 2008] + Fixed bug with unknown chunk handling, introduced in version 1.2.17rc2 + +version 1.2.25beta02 [January 10, 2008] + Prevent gamma from being applied twice. + +version 1.2.25rc01 [January 17, 2008] + No changes. + +version 1.2.25beta03 [January 22, 2008] + Fixed some continue-after-malloc-failure errors in pngset.c (David Hill) + Check for info_ptr == NULL in png_read_info() and png_process_data(). + Check for possible use of NULL user_png_ver[] in png_create_read_struct(). + Change "if (swidth == NULL)" to "if (sheight == NULL)" in png_handle_sCAL + (bug introduced in libpng-1.2.4/1.0.13). + Return from png_destroy_read_struct() if png_ptr_ptr is NULL. + Fix overflow of "msg" in png_decompress_chunk(). + +version 1.2.25beta04 [January 26, 2008] + Work around Coverity bug report by slightly refactoring + png_read_push_finish_row() + +version 1.2.25beta05 [January 31, 2008] + Added libpng-1.2.25beta05.tar.lzma to distribution. Get the lzma codec + from <http://tukaani.org/lzma>. + Added lp1225b05.7z to distribution. Get the 7-zip decoder from + from <http://www.7-zip.org>. + Fixed some broken links in the README file. + +version 1.2.25beta06 [February 6, 2008] + Refactored png_read_push_finish_row() again, trying to satisfy Coverity. + Fixed potential NULL dereference of png_ptr in png_destroy_write_struct(); + clarified potential NULL dereference of png_ptr in png_destroy_read_struct(); + fixed potential NULL dereference of info_ptr in png_handle_bKGD(); + fixed potential NULL dereference of user_png_ver[] in + png_create_write_struct_2(). (Coverity) + +version 1.2.25rc02 [February 10, 2008] + Reset png_ptr->pass in png_read_push_finish_row() before break. + Changed "pass" from png_byte to int. + +version 1.2.25 and 1.0.31 [February 18, 2008] + No changes. + +version 1.2.26beta01 [February 21, 2008] + Added missing "(" in pngmem.c. Bug introduced in libpng-1.2.2/1.0.13 + +version 1.2.26beta02 [March 12, 2008] + Refined error message returned from deflateInit2 in pngwutil.c + Check IHDR length in png_push_read_chunk() before saving it. + +version 1.2.26beta03 [March 16, 2008] + Revised contrib/gregbook to handle premature end-of-file and file + read errors correctly. + +version 1.2.26beta04 [March 18, 2008] + Free png_ptr->big_row_buf and png_ptr->prev_row before allocating + new copies in png_read_start_row(). Bug introduced in libpng-1.2.22. + +version 1.2.26beta05 [March 19, 2008] + Removed extra png_free() added in libpng-1.2.26beta04. + +version 1.2.26beta06 [March 19, 2008] + Avoid reallocating big_row_buf and prev_row when the size does not increase. + +version 1.2.26rc01 [March 26, 2008] + Ifdef out some code that is unused when interlacing is not supported. + +versions 1.0.32 and 1.2.26 [April 2, 2008] + No changes. + +version 1.2.27beta01 [April 12, 2008] + Fixed bug (introduced in libpng-1.0.5h) with handling zero-length + unknown chunks. + Added more information about png_set_keep_unknown_chunks() to the + documentation. + Reject tRNS chunk with out-of-range samples instead of masking off + the invalid high bits as done in since libpng-1.2.19beta5. + +version 1.2.27beta02 [April 13, 2008] + Revised documentation about unknown chunk and user chunk handling. + Keep tRNS chunk with out-of-range samples and issue a png_warning(). + +version 1.2.27beta03 [April 14, 2008] + Added check for NULL ptr in TURBOC version of png_free_default(). + Removed several unnecessary checks for NULL before calling png_free(). + Revised png_set_tRNS() so that calling it twice removes and invalidates + the previous call. + Revised pngtest to check for out-of-range tRNS samples. + +version 1.2.27beta04 [April 18, 2008] + Added AC_LIBTOOL_WIN32_DLL to configure.ac + Rebuilt Makefile.in, aclocal.m4, and configure with autoconf-2.62 + +version 1.2.27beta05 [April 19, 2008] + Added MAINTAINERCLEANFILES variable to Makefile.am + +version 1.2.27beta06 [April 21, 2008] + Avoid changing color_type from GRAY to RGB by + png_set_expand_gray_1_2_4_to_8(). + +version 1.2.27rc01 [April 23, 2008] + Fix broken URL for rfc2083 in png.5 and libpng-*.txt + +version 1.0.33 and 1.2.27 [April 30, 2008] + No changes. + +version 1.0.34 and 1.2.28 [April 30, 2008] + Rebuilt Makefile.in, aclocal.m4, and configure with autoconf-2.61 + due to backward incompatibilities. + Removed a stray object file from contrib/gregbook + +version 1.2.29beta01 [May 1, 2008] + Removed some stray *.diff and *.orig files + +version 1.2.29beta02 [May 1, 2008] + Reverted Makefile.in, aclocal.m4, and configure to the libpng-1.2.26 + versions. + +version 1.2.29beta03 [May 2, 2008] + Added --force to autogen libtoolize options and --force-missing to + automake options. + Changed $(ECHO) to echo in Makefile.am and Makefile.in + Updated all configure files to autoconf-2.62 + Comment out pnggcrd.c code with #ifdef/#endif if using MSC_VER + +version 1.2.29rc01 [May 4, 2008] + No changes. + +version 1.0.35 and 1.2.29 [May 8, 2008] + No changes. + +version 1.0.37 [May 9, 2008] + Updated Makefile.in and configure (omitted version 1.0.36). + +version 1.2.30beta01 [May 29, 2008] + Updated libpng.pc-configure.in and libpng-config.in per debian bug reports. + +version 1.2.30beta02 [June 25, 2008] + Restored png_flush(png_ptr) at the end of png_write_end(), that was + removed from libpng-1.0.9beta03. + +version 1.2.30beta03 [July 6, 2008] + Merged some cosmetic whitespace changes from libpng-1.4.0beta19. + Inline call of png_get_uint_32() in png_get_uint_31(), as in 1.4.0beta19. + Added demo of decoding vpAg and sTER chunks to pngtest.c, from 1.4.0beta19. + Changed PNGMAJ from 0 to 12 in makefile.darwin, which does not like 0. + Added new private function png_read_chunk_header() from 1.4.0beta19. + Merge reading of chunk length and chunk type into a single 8-byte read. + Merge writing of chunk length and chunk type into a single 8-byte write. + +version 1.2.30beta04 [July 10, 2008] + Merged more cosmetic whitespace changes from libpng-1.4.0beta19. + +version 1.0.38rc01, 1.2.30rc01 [July 18, 2008] + No changes. + +version 1.0.38rc02, 1.2.30rc02 [July 21, 2008] + Moved local array "chunkdata" from pngrutil.c to the png_struct, so + it will be freed by png_read_destroy() in case of a read error (Kurt + Christensen). + +version 1.0.38rc03, 1.2.30rc03 [July 21, 2008] + Changed "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking. + +version 1.0.38rc04, 1.2.30rc04 [July 22, 2008] + Changed "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in + png_decompress_chunk(). + +version 1.0.38rc05, 1.2.30rc05 [July 25, 2008] + Changed all remaining "chunkdata" to "png_ptr->chunkdata" in + png_decompress_chunk() and remove chunkdata from parameter list. + Put a call to png_check_chunk_name() in png_read_chunk_header(). + Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte. + Removed two calls to png_check_chunk_name() occuring later in the process. + +version 1.0.38rc06, 1.2.30rc06 [July 29, 2008] + Added a call to png_check_chunk_name() in pngpread.c + Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte. + +version 1.0.38r07, 1.2.30r07 [August 2, 2008] + Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta) + Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings. + Added code in pngset.c to quiet compiler warnings. + Updated contrib/visupng/cexcept.h to version 2.0.1 + Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c + +version 1.0.38r08, 1.2.30r08 [August 2, 2008] + Enclose "volatile" declarations in #ifdef PNG_SETJMP_SUPPORTED (Cosmin). + +version 1.0.38, 1.2.30 [August 14, 2008] + No changes. + +version 1.2.31rc01 [August 19, 2008] + Removed extra crc check at the end of png_handle_cHRM(). Bug introduced + in libpng-1.2.30beta03 (Heiko Nitzsche). + +version 1.2.31rc02 [August 19, 2008] + Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call. + +version 1.2.31rc03 [August 19, 2008] + Added PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED block, off by default, around + new png_flush(). + +version 1.0.39, 1.2.31 [August 21, 2008] + No changes. + +version 1.2.32beta01 [September 6, 2008] + Shortened tIME_string to 29 bytes in pngtest.c (bug introduced in + libpng-1.2.22). + Fixed off-by-one error introduced in png_push_read_zTXt() function in + libpng-1.2.30beta04/pngpread.c (Harald van Dijk) + These bugs have been given the vulnerability id CVE-2008-3964. + +version 1.0.40, 1.2.32 [September 18, 2008] + No changes. + +version 1.2.33beta01 [October 6, 2008] + Revised makefile.darwin to fix shared library numbering. + Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8() + in example.c (debian bug report) + +version 1.2.33rc01 [October 15, 2008] + No changes. + +version 1.0.41rc01, version 1.2.33rc02 [October 23, 2008] + Changed remaining "key" to "png_ptr->chunkdata" in png_handle_tEXt() + to avoid memory leak after memory failure while reading tEXt chunk.` + +version 1.2.33 [October 31, 2008] + No changes. + +version 1.2.34beta01 [November 27, 2008] + Revised png_warning() to write its message on standard output by default + when warning_fn is NULL. This was the behavior prior to libpng-1.2.9beta9. + Fixed string vs pointer-to-string error in png_check_keyword(). + Added png_check_cHRM_fixed() in png.c and moved checking from pngget.c, + pngrutil.c, and pngwrite.c, and eliminated floating point cHRM checking. + Added check for zero-area RGB cHRM triangle in png_check_cHRM_fixed(). + In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant + check for all-zero coordinates that is detected by the triangle check. + Revised png_warning() to write its message on standard output by default + when warning_fn is NULL. + +version 1.2.34beta02 [November 28, 2008] + Corrected off-by-one error in bKGD validity check in png_write_bKGD() + and in png_handle_bKGD(). + +version 1.2.34beta03 [December 1, 2008] + Revised bKGD validity check to use >= x instead of > x + 1 + Merged with png_debug from libpng-1.4.0 to remove newlines. + +version 1.2.34beta04 [December 2, 2008] + More merging with png_debug from libpng-1.4.0 to remove newlines. + +version 1.2.34beta05 [December 5, 2008] + Removed redundant check for key==NULL before calling png_check_keyword() + to ensure that new_key gets initialized and removed extra warning + (Arvan Pritchard). + +version 1.2.34beta06 [December 9, 2008] + In png_write_png(), respect the placement of the filler bytes in an earlier + call to png_set_filler() (Jim Barry). + +version 1.2.34beta07 [December 9, 2008] + Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and + PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated + PNG_TRANSFORM_STRIP_FILLER (Jim Barry). + +version 1.0.42rc01, 1.2.34rc01 [December 11, 2008] + No changes. + +version 1.0.42, 1.2.34 [December 18, 2008] + No changes. + +version 1.2.35beta01 [February 4, 2009] + Zero out some arrays of pointers after png_malloc(). (Tavis Ormandy) + +version 1.2.35beta02 [February 4, 2009] + Zero out more arrays of pointers after png_malloc(). + +version 1.2.35beta03 [February 5, 2009] + Use png_memset() instead of a loop to intialize pointers. We realize + this will not work on platforms where the NULL pointer is not all zeroes. + +version 1.2.35rc01 [February 11, 2009] + No changes. + +version 1.2.35rc02 [February 12, 2009] + Fix typo in new png_memset call in pngset.c (png_color should be png_charp) + +version 1.0.43 and 1.2.35 [February 14, 2009] + No changes. + +version 1.2.36beta01 [February 28, 2009] + Revised comments in png_set_read_fn() and png_set_write_fn(). + Revised order of #ifdef's and indentation in png_debug definitions of png.h + bug introduced in libpng-1.2.34. + +version 1.2.36beta02 [March 21, 2009] + Use png_memset() after png_malloc() of big_row_buf when reading an + interlaced file, to avoid a possible UMR. + Undid recent revision of PNG_NO_STDIO version of png_write_flush(). Users + having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined. + Revised libpng*.txt documentation about use of png_write_flush(). + Removed fflush() from pngtest.c. + Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h + +version 1.2.36beta03 [March 27, 2009] + Relocated misplaced PNG_1_0_X define in png.h that caused the prototype + for png_set_strip_error_numbers() to be omitted from PNG_NO_ASSEMBLER_CODE + builds. This bug was introduced in libpng-1.2.15beta4. + Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt + +version 1.2.36beta04 [April 5, 2009] + Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles) + +version 1.2.36beta05 [April 24, 2009] + Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow + application code writers to bypass the check for multiple inclusion + of setjmp.h when they know that it is safe to ignore the situation. + Made some cosmetic changes to whitespace in pngtest output. + Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress + "shadowed declaration" warning from gcc-4.3.3. + Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration" + warning about a global "gamma" variable in math.h on some platforms. + +version 1.2.36rc01 [April 30, 2009] + No changes. + +version 1.0.44 and 1.2.36 [May 7, 2009] + No changes. + +version 1.2.37beta01 [May 14, 2009] + Fixed inconsistency in pngrutil.c, introduced in libpng-1.2.36. The + memset() was using "png_ptr->rowbytes" instead of "row_bytes", which + the corresponding png_malloc() uses (Joe Drew). + Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri) + Updated some of the makefiles in the scripts directory (merged with + those in libpng-1.4.0beta57). + +version 1.2.37beta02 [May 19, 2009] + Fixed typo in libpng documentation (FILTER_AVE should be FILTER_AVG) + Relocated misplaced #endif in pngwrite.c, sCAL chunk handler. + Conditionally compile png_read_finish_row() which is not used by + progressive readers. + Added contrib/pngminim/preader to demonstrate building minimal progressive + decoder, based on contrib/gregbook with embedded libpng and zlib. + +version 1.2.37beta03 [May 20, 2009] + In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there + is only one makefile in those directories, and revised the README files + accordingly. + Reformated sources in libpng style (3-space indentation, comment format) + +version 1.2.37rc01 [May 27, 2009] + No changes. + +versions 1.2.37 and 1.0.45 [June 4, 2009] + Reformatted several remaining "else statement;" and "if () statement;" into + two lines. + Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h + and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h + Added sections about the git repository and our coding style to the + documentation (merged from libpng-1.4.0beta62) + Added a section to the libpng documentation about using png_get_io_ptr() + in configure scripts to detect the presence of libpng. + +version 1.2.38beta01 [June 17, 2009] + Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR() + multiple times and to specify the sample order in the tRNS chunk, + because the ISO PNG specification has a typo in the tRNS table. + Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to + PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism + available for ignoring known chunks even when not saving unknown chunks. + Adopted preference for consistent use of "#ifdef" and "#ifndef" versus + "#if defined()" and "if !defined()" where possible. + Added PNG_NO_HANDLE_AS_UNKNOWN in the PNG_LEGACY_SUPPORTED block of + pngconf.h, and moved the various unknown chunk macro definitions + outside of the PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks. + +version 1.0.46 [June 18, 2009] + Removed some editing cruft from scripts/libpng.pc.in and some makefiles. + +version 1.2.38rc01 [June 24, 2009] + No changes. + +version 1.2.38rc02 [June 29, 2009] + Added a reference to the libpng license in each source file. + +version 1.2.38rc03 [July 11, 2009] + Revised references to the libpng license in pngconf.h and contrib/visupng + source files. + Rebuilt configure scripts with autoconf-2.63. + +version 1.0.47 and 1.2.38 [July 16, 2009] + No changes. + +version 1.2.39beta01 [July 25, 2009] + Added a prototype for png_64bit_product() in png.c + +version 1.2.39beta02 [July 27, 2009] + Avoid a possible NULL dereference in debug build, in png_set_text_2(). + (bug introduced in libpng-0.95, discovered by Evan Rouault) + +version 1.2.39beta03 [July 29, 2009] + Relocated new png_64_bit_product() prototype into png.h + Expanded the information about prototypes in the libpng style section of + the documentation. + Rebuilt configure scripts with autoconf-2.64. + +version 1.2.39beta04 [August 1, 2009] + Replaced *.tar.lzma with *.txz in distribution. Get the xz codec + from <http://tukaani.org/xz>. + +version 1.2.39beta05 [August 1, 2009] + Reject attempt to write iCCP chunk with negative embedded profile length + (JD Chen) + +version 1.2.39c01 [August 6, 2009] + No changes. + +version 1.2.39 and 1.0.48 [August 13, 2009] + No changes. + +version 1.2.40beta01 [August 20, 2009] + Removed an extra png_debug() recently added to png_write_find_filter(). + Fixed incorrect #ifdef in pngset.c regarding unknown chunk support. + +version 1.2.40rc01 [September 2, 2009] + Various bugfixes and improvements to CMakeLists.txt (Philip Lowman) + +version 1.2.40 and 1.0.49 [September 2, 2009] + No changes. + +version 1.0.50 [September 10, 2009] + Removed some editing cruft from pngset.c and pngwutil.c. + +version 1.2.41beta01 [September 25, 2009] + Moved redundant IHDR checking into new png_check_IHDR() in png.c + and report all errors found in the IHDR data. + Eliminated useless call to png_check_cHRM() from pngset.c + Expanded TAB characters in pngrtran.c + +version 1.2.41beta02 [September 30, 2009] + Revised png_check_IHDR(). + +version 1.2.41beta03 [October 1, 2009] + Revised png_check_IHDR() again, to check info_ptr members instead of + the contents of the returned parameters. + +version 1.2.41beta04 [October 7, 2009] + Added "xcode" project similar one already in libpng-1.4.0beta (Alam Arias). + Ported some cosmetic changes from libpng-1.4.0beta86. + Eliminated a shadowed declaration of "pp" in png_handle_sPLT(). + +version 1.2.41beta05 [October 17, 2009] + Revised pngconf.h to make it easier to enable iTXt support. From libpng + version 1.2.9 through 1.2.40, defining PNG_iTXt_SUPPORTED did not work + as expected. + Ported some cosmetic changes from libpng-1.4.0beta87, changing + many "#if defined(x)" to "#ifdef x". + +version 1.2.41beta06 [October 18, 2009] + Restored PNG_USE_LOCAL_ARRAYS code in pngread.c that was inadvertently + deleted in libpng-1.2.41beta05. + Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h + as in libpng-1.4.0beta78 and later. + +version 1.2.41beta07 [October 21, 2009] + Ported some cosmetic changes from libpng-1.4.0rc01, changing + many "#if defined(x)" to "#ifdef x" in png.h and pngconf.h. + +version 1.2.41beta08 [October 30, 2009] + Ported from libpng-1.4.0rc01: png_calloc(), png_get_io_chunk_name(), + png_get_io_state(), png_set_user_cache_max(), png_get_user_cache_max(), + png_set_premultiply_alpha, and png_do_read_premultiply_alpha(). + Relocated png_do_chop() ahead of building gamma tables in pngrtran.c + This avoids building 16-bit gamma tables unnecessarily. + +version 1.2.41beta09 [November 1, 2009] + Removed a harmless extra png_set_invert_alpha() from pngwrite.c + More bugfixes and improvements to CMakeLists.txt (Philip Lowman) + Moved CMakeLists.txt from scripts into the main libpng directory. + Apply png_user_chunk_cache_max within png_decompress_chunk(). + Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate. + +version 1.2.41beta10 [November 1, 2009] + Enabled iTXt support by default. To ensure binary compatibility with + previous versions, the "lang" and "lang_key" members will be assumed + to be omitted from previous versions unless the current libpng + version was built with PNG_iTXt_SUPPORTED (which is otherwise no + longer necessary to gain iTXt support), as a signal that the user has + been building previous versions with PNG_iTXt_SUPPORTED as well. + +version 1.2.41beta11 [November 2, 2009] + Store user's user_png_ver in new png_ptr->user_png_ver element. + Revised iTXt support. To ensure binary compatibility with + previous versions, the "lang" and "lang_key" members will be assumed + to be omitted from versions prior to 1.2.41beta11 whenever there is a + library mismatch. + +version 1.2.41beta12 [November 2, 2009] + Free png_ptr->user_png_ver when destroying png_ptr. + +version 1.2.41beta13 [November 3, 2009] + Updated scripts/pngw32.def and projects/wince/png32ce.def + Copied projects/wince/png32ce.def to the scripts directory. + Added scripts/makefile.wce + Patched ltmain.sh for wince support. + Added PNG_CONVERT_tIME_SUPPORTED macro. + +version 1.2.41beta14 [November 8, 2009] + versions 1.2.41beta05 through 1.2.41beta13 were abandoned. + The 1.0.x/1.2.x series will only receive security updates from now on. + Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED + Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED + Reverted iTXt compatibility stuff from 1.2.41beta05, 1.2.41beta11, and + 1.2.41beta12. + Reverted IOSTATE feature, user_cache_max, and premultiply_alpha features + from 1.2.41beta08. + Retained png_calloc() from 1.2.41beta08 but as a non-exported function, + and removed reference to png_calloc from scripts/*.def + +version 1.2.41beta15 [November 8, 2009] + Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and + PNG_ALLOCATED macros to detect deprecated direct access to the + png_struct or info_struct members and other deprecated usage in + applications (John Bowler). + Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS, + to prevent warnings about direct access to png structs by libpng + functions while building libpng. They need to be tested, especially + those using compilers other than gcc. + Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG". + +version 1.2.41beta16 [November 9, 2009] + Removed three direct references to read_info_ptr members in pngtest.c + that were detected by the new PNG_DEPSTRUCT macro. + Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined. + +version 1.2.41beta17 [November 10, 2009] + Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions. + Marked deprecated function prototypes with PNG_DEPRECATED. + Marked memory allocation function prototypes with PNG_ALLOCATED. + Changed png_check_sig() to !png_sig_cmp() in contrib programs. + Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c + Added "-DPNG_CONFIGURE_LIBPNG" to the contrib/pngminum makefiles. + +version 1.2.41beta18 [November 11, 2009] + Renamed scripts/makefile.wce to scripts/makefile.cegcc + Marked nonexported functions with PNG_PRIVATE macro. + +version 1.2.41rc01 and 1.0.51rc01 [November 18, 2009] + Revised scripts/*.def to reflect functions actually exported by libpng. + Updated the copyright year in scripts/pngw32.rc from 2004 to 2009. + Moved descriptions of makefiles and other scripts out of INSTALL into + scripts/README.txt + +version 1.2.41rc02 [November 22, 2009] + Rebuilt the configure scripts with autoconf-2.65 + +version 1.2.41rc03 [November 25, 2009] + Disabled the new pedantic warnings about deprecated function use + and deprecated structure access unless the user defines + PNG_PEDANTIC_WARNINGS. + Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files. + Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects. + +version 1.2.41 and 1.0.51 [December 3, 2009] + Updated the list of files and made some cosmetic changes in README. + +version 1.2.42beta01 [December 4, 2009] + Removed "#define PNG_NO_ERROR_NUMBERS" that was inadvertently added + to pngconf.h in version 1.2.41. + Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco + to put png.h and pngconf.h in $prefix/include, like the other scripts, + instead of in $prefix/include/libpng. Also revised makefile.sco + to put them in $prefix/include/libpng12 instead of in + $prefix/include/libpng/libpng12. + Removed leftover "-DPNG_CONFIGURE_LIBPNG" from scripts/makefile.darwin + +version 1.2.42beta02 [December 11, 2009] + Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile + Relocated png_do_chop() to its original position in pngrtran.c. The + change in version 1.2.41beta08 caused transparency to be handled wrong + in some 16-bit datastreams (Yusaku Sugai). + +version 1.2.42rc01 [December 17, 2009] + No changes. + +version 1.2.42rc02 [December 22, 2009] + Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt + (revising changes made in 1.2.41beta17 and 1.2.41rc01) + +version 1.2.42rc03 [December 25, 2009] + Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED + in pngset.c to be consistent with other changes in version 1.2.38. + +version 1.2.42rc04 [January 1, 2010] + Marked png_memcpy_check() and png_memset_check() PNG_DEPRECATED. + Updated copyright year. + +version 1.2.42rc05 [January 2, 2010] + Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr + in pngtest.c + +version 1.2.42 and 1.0.52 [January 3, 2010] + No changes. + +version 1.2.43beta01 [January 27, 2010] + Updated CMakeLists.txt for consistent indentation and to avoid an + unclosed if-statement warning (Philip Lowman). + Removed "#ifdef PNG_1_0_X / #endif" surrounding + PNG_READ_16_TO_8_SUPPORTED and PNG_READ_GRAY_TO_RGB_SUPPORTED + in pngconf.h. These were added in libpng-1.2.41beta08 and libpng-1.0.51, + which introduced a binary incompatibility with libpng-1.0.50. + Backported new png_decompress_chunk() algorithm from libpng-1.4.1. + +version 1.2.43beta02 [February 1, 2010] + Backported two-pass png_decompress_chunk() algorithm from libpng-1.4.1. + +version 1.2.43beta03 [February 6, 2010] + Backported fast png_push_save_buffer() algorithm from libpng-1.4.1. + Backported some cosmetic changes from libpng-1.4.1. + +version 1.2.43beta04 [February 8, 2010] + Reverted recent changes to png_push_save-buffer(). + Removed PNGAPI declaration of png_calloc() and png_write_sig() in + 1ibpng-1.2.X, introduced by mistake in libpng-1.2.41. + Return allocated "old_buffer" in png_push_save_buffer() before png_error() + to avoid a potential memory leak. + +version 1.2.43beta05 [February 8, 2010] + Ported rewritten png_decompress_chunk() by John Bowler from libpng-1.4.1. + +version 1.0.53rc01 and 1.2.43rc01 [February 18, 2010] + No changes. + +version 1.0.53rc02 and 1.2.43rc02 [February 19, 2010] + Define _ALL_SOURCE in configure.ac, makefile.aix, and CMakeLists.txt + when using AIX compiler. + +version 1.0.53 and 1.2.43 [February 25, 2010] + Removed unused gzio.c from contrib/pngminim gather and makefile scripts + +version 1.2.44beta01 [June 18, 2010] + In pngpread.c: png_push_have_row() add check for new_row > height + Removed the now-redundant check for out-of-bounds new_row from example.c + +version 1.2.44beta02 [June 19, 2010] + In pngpread.c: png_push_process_row() add check for too many rows. + Removed the now-redundant check for new_row > height in png_push_have_row(). + +version 1.2.44beta03 [June 20, 2010] + Rewrote png_process_IDAT_data() to consistently treat extra data as warnings + and handle end conditions more cleanly. + Removed the new (beta02) check in png_push_process_row(). + +version 1.2.44rc01 [June 21, 2010] + Revised some comments in png_process_IDAT_data(). + +version 1.2.44rc02 [June 22, 2010] + Stop memory leak when reading a malformed sCAL chunk. + +version 1.2.44rc03 [June 23, 2010] + Revised pngpread.c patch of beta05 to avoid an endless loop. + +version 1.2.44 [June 26, 2010] + Updated some of the "last changed" dates. + +Send comments/corrections/commendations to png-mng-implement at lists.sf.net +(subscription required; visit +https://lists.sourceforge.net/lists/listinfo/png-mng-implement +to subscribe) +or to glennrp at users.sourceforge.net + +Glenn R-P +*/ |