1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libpng/CHANGES Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,4884 @@
1.4 +#if 0
1.5 +CHANGES - changes for libpng
1.6 +
1.7 +Version 0.2
1.8 + added reader into png.h
1.9 + fixed small problems in stub file
1.10 +
1.11 +Version 0.3
1.12 + added pull reader
1.13 + split up pngwrite.c to several files
1.14 + added pnglib.txt
1.15 + added example.c
1.16 + cleaned up writer, adding a few new transformations
1.17 + fixed some bugs in writer
1.18 + interfaced with zlib 0.5
1.19 + added K&R support
1.20 + added check for 64 KB blocks for 16-bit machines
1.21 +
1.22 +Version 0.4
1.23 + cleaned up code and commented code
1.24 + simplified time handling into png_time
1.25 + created png_color_16 and png_color_8 to handle color needs
1.26 + cleaned up color type defines
1.27 + fixed various bugs
1.28 + made various names more consistent
1.29 + interfaced with zlib 0.71
1.30 + cleaned up zTXt reader and writer (using zlib's Reset functions)
1.31 + split transformations into pngrtran.c and pngwtran.c
1.32 +
1.33 +Version 0.5
1.34 + interfaced with zlib 0.8
1.35 + fixed many reading and writing bugs
1.36 + saved using 3 spaces instead of tabs
1.37 +
1.38 +Version 0.6
1.39 + added png_large_malloc() and png_large_free()
1.40 + added png_size_t
1.41 + cleaned up some compiler warnings
1.42 + added png_start_read_image()
1.43 +
1.44 +Version 0.7
1.45 + cleaned up lots of bugs
1.46 + finished dithering and other stuff
1.47 + added test program
1.48 + changed name from pnglib to libpng
1.49 +
1.50 +Version 0.71 [June, 1995]
1.51 + changed pngtest.png for zlib 0.93
1.52 + fixed error in libpng.txt and example.c
1.53 +
1.54 +Version 0.8
1.55 + cleaned up some bugs
1.56 + added png_set_filler()
1.57 + split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
1.58 + added #define's to remove unwanted code
1.59 + moved png_info_init() to png.c
1.60 + added old_size into png_realloc()
1.61 + added functions to manually set filtering and compression info
1.62 + changed compression parameters based on image type
1.63 + optimized filter selection code
1.64 + added version info
1.65 + changed external functions passing floats to doubles (k&r problems?)
1.66 + put all the configurable stuff in pngconf.h
1.67 + enabled png_set_shift to work with paletted images on read
1.68 + added png_read_update_info() - updates info structure with transformations
1.69 +
1.70 +Version 0.81 [August, 1995]
1.71 + incorporated Tim Wegner's medium model code (thanks, Tim)
1.72 +
1.73 +Version 0.82 [September, 1995]
1.74 + [unspecified changes]
1.75 +
1.76 +Version 0.85 [December, 1995]
1.77 + added more medium model code (almost everything's a far)
1.78 + added i/o, error, and memory callback functions
1.79 + fixed some bugs (16-bit, 4-bit interlaced, etc.)
1.80 + added first run progressive reader (barely tested)
1.81 +
1.82 +Version 0.86 [January, 1996]
1.83 + fixed bugs
1.84 + improved documentation
1.85 +
1.86 +Version 0.87 [January, 1996]
1.87 + fixed medium model bugs
1.88 + fixed other bugs introduced in 0.85 and 0.86
1.89 + added some minor documentation
1.90 +
1.91 +Version 0.88 [January, 1996]
1.92 + fixed progressive bugs
1.93 + replaced tabs with spaces
1.94 + cleaned up documentation
1.95 + added callbacks for read/write and warning/error functions
1.96 +
1.97 +Version 0.89 [July, 1996]
1.98 + Added new initialization API to make libpng work better with shared libs
1.99 + we now have png_create_read_struct(), png_create_write_struct(),
1.100 + png_create_info_struct(), png_destroy_read_struct(), and
1.101 + png_destroy_write_struct() instead of the separate calls to
1.102 + malloc and png_read_init(), png_info_init(), and png_write_init()
1.103 + Changed warning/error callback functions to fix bug - this means you
1.104 + should use the new initialization API if you were using the old
1.105 + png_set_message_fn() calls, and that the old API no longer exists
1.106 + so that people are aware that they need to change their code
1.107 + Changed filter selection API to allow selection of multiple filters
1.108 + since it didn't work in previous versions of libpng anyways
1.109 + Optimized filter selection code
1.110 + Fixed png_set_background() to allow using an arbitrary RGB color for
1.111 + paletted images
1.112 + Fixed gamma and background correction for paletted images, so
1.113 + png_correct_palette is not needed unless you are correcting an
1.114 + external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
1.115 + in pngconf.h) - if nobody uses this, it may disappear in the future.
1.116 + Fixed bug with Borland 64K memory allocation (Alexander Lehmann)
1.117 + Fixed bug in interlace handling (Smarasderagd, I think)
1.118 + Added more error checking for writing and image to reduce invalid files
1.119 + Separated read and write functions so that they won't both be linked
1.120 + into a binary when only reading or writing functionality is used
1.121 + New pngtest image also has interlacing and zTXt
1.122 + Updated documentation to reflect new API
1.123 +
1.124 +Version 0.90 [January, 1997]
1.125 + Made CRC errors/warnings on critical and ancillary chunks configurable
1.126 + libpng will use the zlib CRC routines by (compile-time) default
1.127 + Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
1.128 + Added external C++ wrapper statements to png.h (Gilles Dauphin)
1.129 + Allow PNG file to be read when some or all of file signature has already
1.130 + been read from the beginning of the stream. ****This affects the size
1.131 + of info_struct and invalidates all programs that use a shared libpng****
1.132 + Fixed png_filler() declarations
1.133 + Fixed? background color conversions
1.134 + Fixed order of error function pointers to match documentation
1.135 + Current chunk name is now available in png_struct to reduce the number
1.136 + of nearly identical error messages (will simplify multi-lingual
1.137 + support when available)
1.138 + Try to get ready for unknown-chunk callback functions:
1.139 + - previously read critical chunks are flagged, so the chunk handling
1.140 + routines can determine if the chunk is in the right place
1.141 + - all chunk handling routines have the same prototypes, so we will
1.142 + be able to handle all chunks via a callback mechanism
1.143 + Try to fix Linux "setjmp" buffer size problems
1.144 + Removed png_large_malloc, png_large_free, and png_realloc functions.
1.145 +
1.146 +Version 0.95 [March, 1997]
1.147 + Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
1.148 + Fixed bug in PNG file signature compares when start != 0
1.149 + Changed parameter type of png_set_filler(...filler...) from png_byte
1.150 + to png_uint_32
1.151 + Added test for MACOS to ensure that both math.h and fp.h are not #included
1.152 + Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
1.153 + Added "packswap" transformation, which changes the endianness of
1.154 + packed-pixel bytes (Kevin Bracey)
1.155 + Added "strip_alpha" transformation, which removes the alpha channel of
1.156 + input images without using it (not necessarily a good idea)
1.157 + Added "swap_alpha" transformation, which puts the alpha channel in front
1.158 + of the color bytes instead of after
1.159 + Removed all implicit variable tests which assume NULL == 0 (I think)
1.160 + Changed several variables to "png_size_t" to show 16/32-bit limitations
1.161 + Added new pCAL chunk read/write support
1.162 + Added experimental filter selection weighting (Greg Roelofs)
1.163 + Removed old png_set_rgbx() and png_set_xrgb() functions that have been
1.164 + obsolete for about 2 years now (use png_set_filler() instead)
1.165 + Added macros to read 16- and 32-bit ints directly from buffer, to be
1.166 + used only on those systems that support it (namely PowerPC and 680x0)
1.167 + With some testing, this may become the default for MACOS/PPC systems.
1.168 + Only calculate CRC on data if we are going to use it
1.169 + Added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
1.170 + Added macros for simple libpng debugging output selectable at compile time
1.171 + Removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
1.172 + More description of info_struct in libpng.txt and png.h
1.173 + More instructions in example.c
1.174 + More chunk types tested in pngtest.c
1.175 + Renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
1.176 + png_set_<chunk>. We now have corresponding png_get_<chunk>
1.177 + functions in pngget.c to get information in info_ptr. This isolates
1.178 + the application from the internal organization of png_info_struct
1.179 + (good for shared library implementations).
1.180 +
1.181 +Version 0.96 [May, 1997]
1.182 + Fixed serious bug with < 8bpp images introduced in 0.95
1.183 + Fixed 256-color transparency bug (Greg Roelofs)
1.184 + Fixed up documentation (Greg Roelofs, Laszlo Nyul)
1.185 + Fixed "error" in pngconf.h for Linux setjmp() behavior
1.186 + Fixed DOS medium model support (Tim Wegner)
1.187 + Fixed png_check_keyword() for case with error in static string text
1.188 + Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
1.189 + Added typecasts to quiet compiler errors
1.190 + Added more debugging info
1.191 +
1.192 +Version 0.97 [January, 1998]
1.193 + Removed PNG_USE_OWN_CRC capability
1.194 + Relocated png_set_crc_action from pngrutil.c to pngrtran.c
1.195 + Fixed typecasts of "new_key", etc. (Andreas Dilger)
1.196 + Added RFC 1152 [sic] date support
1.197 + Fixed bug in gamma handling of 4-bit grayscale
1.198 + Added 2-bit grayscale gamma handling (Glenn R-P)
1.199 + Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
1.200 + Minor corrections in libpng.txt
1.201 + Added simple sRGB support (Glenn R-P)
1.202 + Easier conditional compiling, e.g.,
1.203 + define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
1.204 + all configurable options can be selected from command-line instead
1.205 + of having to edit pngconf.h (Glenn R-P)
1.206 + Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
1.207 + Added more conditions for png_do_background, to avoid changing
1.208 + black pixels to background when a background is supplied and
1.209 + no pixels are transparent
1.210 + Repaired PNG_NO_STDIO behavior
1.211 + Tested NODIV support and made it default behavior (Greg Roelofs)
1.212 + Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
1.213 + Regularized version numbering scheme and bumped shared-library major
1.214 + version number to 2 to avoid problems with libpng 0.89 apps
1.215 + (Greg Roelofs)
1.216 +
1.217 +Version 0.98 [January, 1998]
1.218 + Cleaned up some typos in libpng.txt and in code documentation
1.219 + Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
1.220 + Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
1.221 + Changed recommendation about file_gamma for PC images to .51 from .45,
1.222 + in example.c and libpng.txt, added comments to distinguish between
1.223 + screen_gamma, viewing_gamma, and display_gamma.
1.224 + Changed all references to RFC1152 to read RFC1123 and changed the
1.225 + PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
1.226 + Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
1.227 + Changed srgb_intent from png_byte to int to avoid compiler bugs
1.228 +
1.229 +Version 0.99 [January 30, 1998]
1.230 + Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
1.231 + Fixed a longstanding "packswap" bug in pngtrans.c
1.232 + Fixed some inconsistencies in pngconf.h that prevented compiling with
1.233 + PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
1.234 + Fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
1.235 + Changed recommendation about file_gamma for PC images to .50 from .51 in
1.236 + example.c and libpng.txt, and changed file_gamma for sRGB images to .45
1.237 + Added a number of functions to access information from the png structure
1.238 + png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
1.239 + Added TARGET_MACOS similar to zlib-1.0.8
1.240 + Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
1.241 + Added type casting to all png_malloc() function calls
1.242 +
1.243 +Version 0.99a [January 31, 1998]
1.244 + Added type casts and parentheses to all returns that return a value.(Tim W.)
1.245 +
1.246 +Version 0.99b [February 4, 1998]
1.247 + Added type cast png_uint_32 on malloc function calls where needed.
1.248 + Changed type of num_hist from png_uint_32 to int (same as num_palette).
1.249 + Added checks for rowbytes overflow, in case png_size_t is less than 32 bits.
1.250 + Renamed makefile.elf to makefile.lnx.
1.251 +
1.252 +Version 0.99c [February 7, 1998]
1.253 + More type casting. Removed erroneous overflow test in pngmem.c.
1.254 + Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.
1.255 + Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5.
1.256 +
1.257 +Version 0.99d [February 11, 1998]
1.258 + Renamed "far_to_near()" "png_far_to_near()"
1.259 + Revised libpng.3
1.260 + Version 99c "buffered" operations didn't work as intended. Replaced them
1.261 + with png_memcpy_check() and png_memset_check().
1.262 + Added many "if (png_ptr == NULL) return" to quell compiler warnings about
1.263 + unused png_ptr, mostly in pngget.c and pngset.c.
1.264 + Check for overlength tRNS chunk present when indexed-color PLTE is read.
1.265 + Cleaned up spelling errors in libpng.3/libpng.txt
1.266 + Corrected a problem with png_get_tRNS() which returned undefined trans array
1.267 +
1.268 +Version 0.99e [February 28, 1998]
1.269 + Corrected png_get_tRNS() again.
1.270 + Add parentheses for easier reading of pngget.c, fixed "||" should be "&&".
1.271 + Touched up example.c to make more of it compileable, although the entire
1.272 + file still can't be compiled (Willem van Schaik)
1.273 + Fixed a bug in png_do_shift() (Bryan Tsai)
1.274 + Added a space in png.h prototype for png_write_chunk_start()
1.275 + Replaced pngtest.png with one created with zlib 1.1.1
1.276 + Changed pngtest to report PASS even when file size is different (Jean-loup G.)
1.277 + Corrected some logic errors in png_do_invert_alpha() (Chris Patterson)
1.278 +
1.279 +Version 0.99f [March 5, 1998]
1.280 + Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey)
1.281 + Moved makefiles into a "scripts" directory, and added INSTALL instruction file
1.282 + Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok)
1.283 + Added pointers to "note on libpng versions" in makefile.lnx and README
1.284 + Added row callback feature when reading and writing nonprogressive rows
1.285 + and added a test of this feature in pngtest.c
1.286 + Added user transform callbacks, with test of the feature in pngtest.c
1.287 +
1.288 +Version 0.99g [March 6, 1998, morning]
1.289 + Minor changes to pngtest.c to suppress compiler warnings.
1.290 + Removed "beta" language from documentation.
1.291 +
1.292 +Version 0.99h [March 6, 1998, evening]
1.293 + Minor changes to previous minor changes to pngtest.c
1.294 + Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED
1.295 + and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro
1.296 + Added user transform capability
1.297 +
1.298 +Version 1.00 [March 7, 1998]
1.299 + Changed several typedefs in pngrutil.c
1.300 + Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)
1.301 + Replaced "while(1)" with "for(;;)"
1.302 + Added PNGARG() to prototypes in pngtest.c and removed some prototypes
1.303 + Updated some of the makefiles (Tom Lane)
1.304 + Changed some typedefs (s_start, etc.) in pngrutil.c
1.305 + Fixed dimensions of "short_months" array in pngwrite.c
1.306 + Replaced ansi2knr.c with the one from jpeg-v6
1.307 +
1.308 +Version 1.0.0 [March 8, 1998]
1.309 + Changed name from 1.00 to 1.0.0 (Adam Costello)
1.310 + Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)
1.311 +
1.312 +Version 1.0.0a [March 9, 1998]
1.313 + Fixed three bugs in pngrtran.c to make gamma+background handling consistent
1.314 + (Greg Roelofs)
1.315 + Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz
1.316 + for major, minor, and bugfix releases. This is 10001. (Adam Costello,
1.317 + Tom Lane)
1.318 + Make months range from 1-12 in png_convert_to_rfc1123
1.319 +
1.320 +Version 1.0.0b [March 13, 1998]
1.321 + Quieted compiler complaints about two empty "for" loops in pngrutil.c
1.322 + Minor changes to makefile.s2x
1.323 + Removed #ifdef/#endif around a png_free() in pngread.c
1.324 +
1.325 +Version 1.0.1 [March 14, 1998]
1.326 + Changed makefile.s2x to reduce security risk of using a relative pathname
1.327 + Fixed some typos in the documentation (Greg).
1.328 + Fixed a problem with value of "channels" returned by png_read_update_info()
1.329 +
1.330 +Version 1.0.1a [April 21, 1998]
1.331 + Optimized Paeth calculations by replacing abs() function calls with intrinsics
1.332 + plus other loop optimizations. Improves avg decoding speed by about 20%.
1.333 + Commented out i386istic "align" compiler flags in makefile.lnx.
1.334 + Reduced the default warning level in some makefiles, to make them consistent.
1.335 + Removed references to IJG and JPEG in the ansi2knr.c copyright statement.
1.336 + Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.
1.337 + Added grayscale and 16-bit capability to png_do_read_filler().
1.338 + Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes
1.339 + too large when writing an image with bit_depth < 8 (Bob Dellaca).
1.340 + Corrected some bugs in the experimental weighted filtering heuristics.
1.341 + Moved a misplaced pngrutil code block that truncates tRNS if it has more
1.342 + than num_palette entries -- test was done before num_palette was defined.
1.343 + Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
1.344 + Changed compiler flags in makefile.wat for better optimization
1.345 + (Pawel Mrochen).
1.346 +
1.347 +Version 1.0.1b [May 2, 1998]
1.348 + Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
1.349 + Relocated the png_composite macros from pngrtran.c to png.h (Greg).
1.350 + Added makefile.sco (contributed by Mike Hopkirk).
1.351 + Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
1.352 + Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
1.353 + More work on the Paeth-filtering, achieving imperceptible speedup
1.354 + (A Kleinert).
1.355 + More work on loop optimization which may help when compiled with C++
1.356 + compilers.
1.357 + Added warnings when people try to use transforms they've defined out.
1.358 + Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
1.359 + Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
1.360 +
1.361 +Version 1.0.1c [May 11, 1998]
1.362 + Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
1.363 + filler bytes should have been 0xff instead of 0xf.
1.364 + Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
1.365 + Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
1.366 + out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
1.367 + Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,
1.368 + for consistency, in pngconf.h
1.369 + Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier
1.370 + to remove unwanted capabilities via the compile line
1.371 + Made some corrections to grammar (which, it's) in documentation (Greg).
1.372 + Corrected example.c, use of row_pointers in png_write_image().
1.373 +
1.374 +Version 1.0.1d [May 24, 1998]
1.375 + Corrected several statements that used side effects illegally in pngrutil.c
1.376 + and pngtrans.c, that were introduced in version 1.0.1b
1.377 + Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
1.378 + More corrections to example.c, use of row_pointers in png_write_image()
1.379 + and png_read_rows().
1.380 + Added pngdll.mak and pngdef.pas to scripts directory, contributed by
1.381 + Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
1.382 + Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
1.383 + Changed several loops from count-down to count-up, for consistency.
1.384 +
1.385 +Version 1.0.1e [June 6, 1998]
1.386 + Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
1.387 + added warnings when people try to set png_read_fn and png_write_fn in
1.388 + the same structure.
1.389 + Added a test such that png_do_gamma will be done when num_trans==0
1.390 + for truecolor images that have defined a background. This corrects an
1.391 + error that was introduced in libpng-0.90 that can cause gamma processing
1.392 + to be skipped.
1.393 + Added tests in png.h to include "trans" and "trans_values" in structures
1.394 + when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined.
1.395 + Add png_free(png_ptr->time_buffer) in png_destroy_read_struct()
1.396 + Moved png_convert_to_rfc_1123() from pngwrite.c to png.c
1.397 + Added capability for user-provided malloc_fn() and free_fn() functions,
1.398 + and revised pngtest.c to demonstrate their use, replacing the
1.399 + PNGTEST_DEBUG_MEM feature.
1.400 + Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
1.401 +
1.402 +Version 1.0.2 [June 14, 1998]
1.403 + Fixed two bugs in makefile.bor .
1.404 +
1.405 +Version 1.0.2a [December 30, 1998]
1.406 + Replaced and extended code that was removed from png_set_filler() in 1.0.1a.
1.407 + Fixed a bug in png_do_filler() that made it fail to write filler bytes in
1.408 + the left-most pixel of each row (Kevin Bracey).
1.409 + Changed "static pngcharp tIME_string" to "static char tIME_string[30]"
1.410 + in pngtest.c (Duncan Simpson).
1.411 + Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk
1.412 + even when no tIME chunk was present in the source file.
1.413 + Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit.
1.414 + Fixed a problem in png_read_push_finish_row(), which would not skip some
1.415 + passes that it should skip, for images that are less than 3 pixels high.
1.416 + Interchanged the order of calls to png_do_swap() and png_do_shift()
1.417 + in pngwtran.c (John Cromer).
1.418 + Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h .
1.419 + Changed "bad adaptive filter type" from error to warning in pngrutil.c .
1.420 + Fixed a documentation error about default filtering with 8-bit indexed-color.
1.421 + Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO
1.422 + (L. Peter Deutsch).
1.423 + Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.
1.424 + Added png_get_copyright() and png_get_header_version() functions.
1.425 + Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c
1.426 + Added information about debugging in libpng.txt and libpng.3 .
1.427 + Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and
1.428 + makefile.sco.
1.429 + Removed lines after Dynamic Dependencies" in makefile.aco .
1.430 + Revised makefile.dec to make a shared library (Jeremie Petit).
1.431 + Removed trailing blanks from all files.
1.432 +
1.433 +Version 1.0.2a [January 6, 1999]
1.434 + Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h
1.435 + Added "if" tests to silence complaints about unused png_ptr in png.h and png.c
1.436 + Changed "check_if_png" function in example.c to return true (nonzero) if PNG.
1.437 + Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()
1.438 + which is obsolete.
1.439 +
1.440 +Version 1.0.3 [January 14, 1999]
1.441 + Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)
1.442 + Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.
1.443 +
1.444 +Version 1.0.3a [August 12, 1999]
1.445 + Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
1.446 + if an attempt is made to read an interlaced image when it's not supported.
1.447 + Added check if png_ptr->trans is defined before freeing it in pngread.c
1.448 + Modified the Y2K statement to include versions back to version 0.71
1.449 + Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c
1.450 + Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)
1.451 + Replaced leading blanks with tab characters in makefile.hux
1.452 + Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.
1.453 + Changed (float)red and (float)green to (double)red, (double)green
1.454 + in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.
1.455 + Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).
1.456 + Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).
1.457 + Updated documentation to refer to the PNG-1.2 specification.
1.458 + Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c
1.459 + in makefile.knr, INSTALL, and README (L. Peter Deutsch)
1.460 + Fixed bugs in calculation of the length of rowbytes when adding alpha
1.461 + channels to 16-bit images, in pngrtran.c (Chris Nokleberg)
1.462 + Added function png_set_user_transform_info() to store user_transform_ptr,
1.463 + user_depth, and user_channels into the png_struct, and a function
1.464 + png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)
1.465 + Added function png_set_empty_plte_permitted() to make libpng useable
1.466 + in MNG applications.
1.467 + Corrected the typedef for png_free_ptr in png.h (Jesse Jones).
1.468 + Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
1.469 + consistent with PNG-1.2, and allow variance of 500 before complaining.
1.470 + Added assembler code contributed by Intel in file pngvcrd.c and modified
1.471 + makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation,
1.472 + Gilles Vollant)
1.473 + Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
1.474 + Added some aliases for png_set_expand() in pngrtran.c, namely
1.475 + png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
1.476 + (Greg Roelofs, in "PNG: The Definitive Guide").
1.477 + Added makefile.beo for BEOS on X86, contributed by Sander Stok.
1.478 +
1.479 +Version 1.0.3b [August 26, 1999]
1.480 + Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
1.481 + Changed leading blanks to tabs in all makefiles.
1.482 + Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
1.483 + Made alternate versions of png_set_expand() in pngrtran.c, namely
1.484 + png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
1.485 + (Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases.
1.486 + Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
1.487 + Revised calculation of num_blocks in pngmem.c to avoid a potentially
1.488 + negative shift distance, whose results are undefined in the C language.
1.489 + Added a check in pngset.c to prevent writing multiple tIME chunks.
1.490 + Added a check in pngwrite.c to detect invalid small window_bits sizes.
1.491 +
1.492 +Version 1.0.3d [September 4, 1999]
1.493 + Fixed type casting of igamma in pngrutil.c
1.494 + Added new png_expand functions to scripts/pngdef.pas and pngos2.def
1.495 + Added a demo read_user_transform_fn that examines the row filters in pngtest.c
1.496 +
1.497 +Version 1.0.4 [September 24, 1999]
1.498 + Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
1.499 + Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
1.500 + Made several minor corrections to pngtest.c
1.501 + Renamed the makefiles with longer but more user friendly extensions.
1.502 + Copied the PNG copyright and license to a separate LICENSE file.
1.503 + Revised documentation, png.h, and example.c to remove reference to
1.504 + "viewing_gamma" which no longer appears in the PNG specification.
1.505 + Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
1.506 + Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
1.507 + Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
1.508 + assembler code) and makefile.vcwin32 (doesn't).
1.509 + Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
1.510 + Added a copy of pngnow.png to the distribution.
1.511 +
1.512 +Version 1.0.4a [September 25, 1999]
1.513 + Increase max_pixel_depth in pngrutil.c if a user transform needs it.
1.514 + Changed several division operations to right-shifts in pngvcrd.c
1.515 +
1.516 +Version 1.0.4b [September 30, 1999]
1.517 + Added parentheses in line 3732 of pngvcrd.c
1.518 + Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
1.519 +
1.520 +Version 1.0.4c [October 1, 1999]
1.521 + Added a "png_check_version" function in png.c and pngtest.c that will generate
1.522 + a helpful compiler error if an old png.h is found in the search path.
1.523 + Changed type of png_user_transform_depth|channels from int to png_byte.
1.524 +
1.525 +Version 1.0.4d [October 6, 1999]
1.526 + Changed 0.45 to 0.45455 in png_set_sRGB()
1.527 + Removed unused PLTE entries from pngnow.png
1.528 + Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.
1.529 +
1.530 +Version 1.0.4e [October 10, 1999]
1.531 + Fixed sign error in pngvcrd.c (Greg Roelofs)
1.532 + Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)
1.533 +
1.534 +Version 1.0.4f [October 15, 1999]
1.535 + Surrounded example.c code with #if 0 .. #endif to prevent people from
1.536 + inadvertently trying to compile it.
1.537 + Changed png_get_header_version() from a function to a macro in png.h
1.538 + Added type casting mostly in pngrtran.c and pngwtran.c
1.539 + Removed some pointless "ptr = NULL" in pngmem.c
1.540 + Added a "contrib" directory containing the source code from Greg's book.
1.541 +
1.542 +Version 1.0.5 [October 15, 1999]
1.543 + Minor editing of the INSTALL and README files.
1.544 +
1.545 +Version 1.0.5a [October 23, 1999]
1.546 + Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
1.547 + Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
1.548 + Further optimization and bugfix of pngvcrd.c
1.549 + Revised pngset.c so that it does not allocate or free memory in the user's
1.550 + text_ptr structure. Instead, it makes its own copy.
1.551 + Created separate write_end_info_struct in pngtest.c for a more severe test.
1.552 + Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
1.553 +
1.554 +Version 1.0.5b [November 23, 1999]
1.555 + Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and
1.556 + PNG_FLAG_WROTE_tIME from flags to mode.
1.557 + Added png_write_info_before_PLTE() function.
1.558 + Fixed some typecasting in contrib/gregbook/*.c
1.559 + Updated scripts/makevms.com and added makevms.com to contrib/gregbook
1.560 + and contrib/pngminus (Martin Zinser)
1.561 +
1.562 +Version 1.0.5c [November 26, 1999]
1.563 + Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr.
1.564 + Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
1.565 + accommodate making DLL's: Moved usr_png_ver from global variable to function
1.566 + png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and
1.567 + eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays
1.568 + into pngtypes.h. Eliminated use of global png_pass arrays. Declared the
1.569 + png_CHNK and png_pass arrays to be "const". Made the global arrays
1.570 + available to applications (although none are used in libpng itself) when
1.571 + PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined.
1.572 + Removed some extraneous "-I" from contrib/pngminus/makefile.std
1.573 + Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.
1.574 + Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3
1.575 +
1.576 +Version 1.0.5d [November 29, 1999]
1.577 + Add type cast (png_const_charp) two places in png.c
1.578 + Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
1.579 + Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
1.580 + to applications a macro "PNG_USE_LOCAL_ARRAYS".
1.581 + comment out (with #ifdef) all the new declarations when
1.582 + PNG_USE_GLOBAL_ARRAYS is defined.
1.583 + Added PNG_EXPORT_VAR macro to accommodate making DLL's.
1.584 +
1.585 +Version 1.0.5e [November 30, 1999]
1.586 + Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
1.587 + structure; refactored the inflate/deflate support to make adding new chunks
1.588 + with trailing compressed parts easier in the future, and added new functions
1.589 + png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP,
1.590 + png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond).
1.591 + NOTE: Applications that write text chunks MUST define png_text->lang
1.592 + before calling png_set_text(). It must be set to NULL if you want to
1.593 + write tEXt or zTXt chunks. If you want your application to be able to
1.594 + run with older versions of libpng, use
1.595 +
1.596 + #ifdef PNG_iTXt_SUPPORTED
1.597 + png_text[i].lang = NULL;
1.598 + #endif
1.599 +
1.600 + Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned
1.601 + offsets (Eric S. Raymond).
1.602 + Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into
1.603 + PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED
1.604 + macros, leaving the separate macros also available.
1.605 + Removed comments on #endifs at the end of many short, non-nested #if-blocks.
1.606 +
1.607 +Version 1.0.5f [December 6, 1999]
1.608 + Changed makefile.solaris to issue a warning about potential problems when
1.609 + the ucb "ld" is in the path ahead of the ccs "ld".
1.610 + Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.
1.611 + Added sCAL chunk support (Eric S. Raymond).
1.612 +
1.613 +Version 1.0.5g [December 7, 1999]
1.614 + Fixed "png_free_spallettes" typo in png.h
1.615 + Added code to handle new chunks in pngpread.c
1.616 + Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block
1.617 + Added "translated_key" to png_text structure and png_write_iTXt().
1.618 + Added code in pngwrite.c to work around a newly discovered zlib bug.
1.619 +
1.620 +Version 1.0.5h [December 10, 1999]
1.621 + NOTE: regarding the note for version 1.0.5e, the following must also
1.622 + be included in your code:
1.623 + png_text[i].translated_key = NULL;
1.624 + Unknown chunk handling is now supported.
1.625 + Option to eliminate all floating point support was added. Some new
1.626 + fixed-point functions such as png_set_gAMA_fixed() were added.
1.627 + Expanded tabs and removed trailing blanks in source files.
1.628 +
1.629 +Version 1.0.5i [December 13, 1999]
1.630 + Added some type casts to silence compiler warnings.
1.631 + Renamed "png_free_spalette" to "png_free_spalettes" for consistency.
1.632 + Removed leading blanks from a #define in pngvcrd.c
1.633 + Added some parameters to the new png_set_keep_unknown_chunks() function.
1.634 + Added a test for up->location != 0 in the first instance of writing
1.635 + unknown chunks in pngwrite.c
1.636 + Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to
1.637 + prevent recursion.
1.638 + Added png_free_hIST() function.
1.639 + Various patches to fix bugs in the sCAL and integer cHRM processing,
1.640 + and to add some convenience macros for use with sCAL.
1.641 +
1.642 +Version 1.0.5j [December 21, 1999]
1.643 + Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
1.644 + around buggy compilers.
1.645 + Added new type "png_fixed_point" for integers that hold float*100000 values
1.646 + Restored backward compatibility of tEXt/zTXt chunk processing:
1.647 + Restored the first four members of png_text to the same order as v.1.0.5d.
1.648 + Added members "lang_key" and "itxt_length" to png_text struct. Set
1.649 + text_length=0 when "text" contains iTXt data. Use the "compression"
1.650 + member to distinguish among tEXt/zTXt/iTXt types. Added
1.651 + PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.
1.652 + The "Note" above, about backward incompatibility of libpng-1.0.5e, no
1.653 + longer applies.
1.654 + Fixed png_read|write_iTXt() to read|write parameters in the right order,
1.655 + and to write the iTXt chunk after IDAT if it appears in the end_ptr.
1.656 + Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
1.657 + Reversed the order of trying to write floating-point and fixed-point gAMA.
1.658 +
1.659 +Version 1.0.5k [December 27, 1999]
1.660 + Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
1.661 + Added png_handle_as_unknown() function (Glenn)
1.662 + Added png_free_chunk_list() function and chunk_list and num_chunk_list members
1.663 + of png_ptr.
1.664 + Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.
1.665 + Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings
1.666 + about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)
1.667 + Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
1.668 + Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
1.669 + Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
1.670 +
1.671 +Version 1.0.5l [January 1, 2000]
1.672 + Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
1.673 + for setting a callback function to handle unknown chunks and for
1.674 + retrieving the associated user pointer (Glenn).
1.675 +
1.676 +Version 1.0.5m [January 7, 2000]
1.677 + Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
1.678 +
1.679 +Version 1.0.5n [January 9, 2000]
1.680 + Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
1.681 + own memory for info_ptr->palette. This makes it safe for the calling
1.682 + application to free its copy of the palette any time after it calls
1.683 + png_set_PLTE().
1.684 +
1.685 +Version 1.0.5o [January 20, 2000]
1.686 + Cosmetic changes only (removed some trailing blanks and TABs)
1.687 +
1.688 +Version 1.0.5p [January 31, 2000]
1.689 + Renamed pngdll.mak to makefile.bd32
1.690 + Cosmetic changes in pngtest.c
1.691 +
1.692 +Version 1.0.5q [February 5, 2000]
1.693 + Relocated the makefile.solaris warning about PATH problems.
1.694 + Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
1.695 + Revised makefile.gcmmx
1.696 + Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
1.697 +
1.698 +Version 1.0.5r [February 7, 2000]
1.699 + Removed superfluous prototype for png_get_itxt from png.h
1.700 + Fixed a bug in pngrtran.c that improperly expanded the background color.
1.701 + Return *num_text=0 from png_get_text() when appropriate, and fix documentation
1.702 + of png_get_text() in libpng.txt/libpng.3.
1.703 +
1.704 +Version 1.0.5s [February 18, 2000]
1.705 + Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
1.706 + new error handler that's planned for the next libpng release, and changed
1.707 + example.c, pngtest.c, and contrib programs to use this macro.
1.708 + Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
1.709 + Fixed a bug in png_read_png() that caused it to fail to expand some images
1.710 + that it should have expanded.
1.711 + Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
1.712 + in pngget.c
1.713 + Changed the allocation of palette, history, and trans arrays back to
1.714 + the version 1.0.5 method (linking instead of copying) which restores
1.715 + backward compatibility with version 1.0.5. Added some remarks about
1.716 + that in example.c. Added "free_me" member to info_ptr and png_ptr
1.717 + and added png_free_data() function.
1.718 + Updated makefile.linux and makefile.gccmmx to make directories conditionally.
1.719 + Made cosmetic changes to pngasmrd.h
1.720 + Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
1.721 + Modified png_read_png() to allocate info_ptr->row_pointers only if it
1.722 + hasn't already been allocated.
1.723 +
1.724 +Version 1.0.5t [March 4, 2000]
1.725 + Changed png_jmp_env() migration aiding macro to png_jmpbuf().
1.726 + Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c
1.727 + Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when
1.728 + PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b
1.729 + Files in contrib/gregbook were revised to use png_jmpbuf() and to select
1.730 + a 24-bit visual if one is available, and to allow abbreviated options.
1.731 + Files in contrib/pngminus were revised to use the png_jmpbuf() macro.
1.732 + Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s
1.733 +
1.734 +Version 1.0.5u [March 5, 2000]
1.735 + Simplified the code that detects old png.h in png.c and pngtest.c
1.736 + Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)
1.737 + Increased precision of rgb_to_gray calculations from 8 to 15 bits and
1.738 + added png_set_rgb_to_gray_fixed() function.
1.739 + Added makefile.bc32 (32-bit Borland C++, C mode)
1.740 +
1.741 +Version 1.0.5v [March 11, 2000]
1.742 + Added some parentheses to the png_jmpbuf macro definition.
1.743 + Updated references to the zlib home page, which has moved to freesoftware.com.
1.744 + Corrected bugs in documentation regarding png_read_row() and png_write_row().
1.745 + Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt.
1.746 + Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
1.747 + revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
1.748 +
1.749 +Version 1.0.6 [March 20, 2000]
1.750 + Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c
1.751 + Added makefile.sggcc (SGI IRIX with gcc)
1.752 +
1.753 +Version 1.0.6d [April 7, 2000]
1.754 + Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
1.755 + Added data_length parameter to png_decompress_chunk() function
1.756 + Revised documentation to remove reference to abandoned png_free_chnk functions
1.757 + Fixed an error in png_rgb_to_gray_fixed()
1.758 + Revised example.c, usage of png_destroy_write_struct().
1.759 + Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
1.760 + Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c
1.761 + Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
1.762 +
1.763 +Version 1.0.6e [April 9, 2000]
1.764 + Added png_data_freer() function.
1.765 + In the code that checks for over-length tRNS chunks, added check of
1.766 + info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
1.767 + Minor revisions of libpng.txt/libpng.3.
1.768 + Check for existing data and free it if the free_me flag is set, in png_set_*()
1.769 + and png_handle_*().
1.770 + Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED
1.771 + is defined.
1.772 + Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c
1.773 + and mentioned the purposes of the two macros in libpng.txt/libpng.3.
1.774 +
1.775 +Version 1.0.6f [April 14, 2000]
1.776 + Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.
1.777 + Add checks in png_set_text() for NULL members of the input text structure.
1.778 + Revised libpng.txt/libpng.3.
1.779 + Removed superfluous prototype for png_set_iTXt from png.h
1.780 + Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
1.781 + Changed several png_errors about malformed ancillary chunks to png_warnings.
1.782 +
1.783 +Version 1.0.6g [April 24, 2000]
1.784 + Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
1.785 + Relocated paragraph about png_set_background() in libpng.3/libpng.txt
1.786 + and other revisions (Matthias Benckmann)
1.787 + Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
1.788 + png_ptr members to restore binary compatibility with libpng-1.0.5
1.789 + (breaks compatibility with libpng-1.0.6).
1.790 +
1.791 +Version 1.0.6h [April 24, 2000]
1.792 + Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds
1.793 + libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)
1.794 + This is a temporary change for test purposes.
1.795 +
1.796 +Version 1.0.6i [May 2, 2000]
1.797 + Rearranged some members at the end of png_info and png_struct, to put
1.798 + unknown_chunks_num and free_me within the original size of the png_structs
1.799 + and free_me, png_read_user_fn, and png_free_fn within the original png_info,
1.800 + because some old applications allocate the structs directly instead of
1.801 + using png_create_*().
1.802 + Added documentation of user memory functions in libpng.txt/libpng.3
1.803 + Modified png_read_png so that it will use user_allocated row_pointers
1.804 + if present, unless free_me directs that it be freed, and added description
1.805 + of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.
1.806 + Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version
1.807 + 1.00) members of png_struct and png_info, to regain binary compatibility
1.808 + when you define this macro. Capabilities lost in this event
1.809 + are user transforms (new in version 1.0.0),the user transform pointer
1.810 + (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,
1.811 + the high-level interface, and unknown chunks support (all new in 1.0.6).
1.812 + This was necessary because of old applications that allocate the structs
1.813 + directly as authors were instructed to do in libpng-0.88 and earlier,
1.814 + instead of using png_create_*().
1.815 + Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which
1.816 + can be used to detect codes that directly allocate the structs, and
1.817 + code to check these modes in png_read_init() and png_write_init() and
1.818 + generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED
1.819 + was not defined.
1.820 + Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
1.821 +
1.822 +Version 1.0.6j [May 3, 2000]
1.823 + Overloaded png_read_init() and png_write_init() with macros that convert
1.824 + calls to png_read_init_2() or png_write_init_2() that check the version
1.825 + and structure sizes.
1.826 +
1.827 +Version 1.0.7beta11 [May 7, 2000]
1.828 + Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
1.829 + which are no longer used.
1.830 + Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
1.831 + defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED
1.832 + is defined.
1.833 + Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory
1.834 + overrun when old applications fill the info_ptr->text structure directly.
1.835 + Added PNGAPI macro, and added it to the definitions of all exported functions.
1.836 + Relocated version macro definitions ahead of the includes of zlib.h and
1.837 + pngconf.h in png.h.
1.838 +
1.839 +Version 1.0.7beta12 [May 12, 2000]
1.840 + Revised pngset.c to avoid a problem with expanding the png_debug macro.
1.841 + Deleted some extraneous defines from pngconf.h
1.842 + Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
1.843 + Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
1.844 + Added png_access_version_number() function.
1.845 + Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
1.846 + Expanded libpng.3/libpng.txt information about png_data_freer().
1.847 +
1.848 +Version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
1.849 + Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
1.850 + warnings instead of errors, as pngrutil.c does.
1.851 + Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
1.852 + will actually write IDATs.
1.853 + Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
1.854 + Make png_free_data() ignore its final parameter except when freeing data
1.855 + that can have multiple instances (text, sPLT, unknowns).
1.856 + Fixed a new bug in png_set_rows().
1.857 + Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
1.858 + Added png_set_invalid() function.
1.859 + Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
1.860 +
1.861 +Version 1.0.7beta15 [May 30, 2000]
1.862 + Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
1.863 + fewer error messages.
1.864 + Rearranged checks for Z_OK to check the most likely path first in pngpread.c
1.865 + and pngwutil.c.
1.866 + Added checks in pngtest.c for png_create_*() returning NULL, and mentioned
1.867 + in libpng.txt/libpng.3 the need for applications to check this.
1.868 + Changed names of png_default_*() functions in pngtest to pngtest_*().
1.869 + Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32.
1.870 + Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c
1.871 + Set each pointer to NULL after freeing it in png_free_data().
1.872 + Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
1.873 + macro that conflicts with libpng's png_color_16.index. (Dimitri
1.874 + Papadapoulos)
1.875 + Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).
1.876 +
1.877 +Version 1.0.7beta16 [June 4, 2000]
1.878 + Revised the workaround of AIX string.h "index" bug.
1.879 + Added a check for overlength PLTE chunk in pngrutil.c.
1.880 + Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
1.881 + indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
1.882 + Added a warning in png_decompress_chunk() when it runs out of data, e.g.
1.883 + when it tries to read an erroneous PhotoShop iCCP chunk.
1.884 + Added PNG_USE_DLL macro.
1.885 + Revised the copyright/disclaimer/license notice.
1.886 + Added contrib/msvctest directory
1.887 +
1.888 +Version 1.0.7rc1 [June 9, 2000]
1.889 + Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
1.890 + Added contrib/visupng directory (Willem van Schaik)
1.891 +
1.892 +Version 1.0.7beta18 [June 23, 2000]
1.893 + Revised PNGAPI definition, and pngvcrd.c to work with __GCC__
1.894 + and do not redefine PNGAPI if it is passed in via a compiler directive.
1.895 + Revised visupng/PngFile.c to remove returns from within the Try block.
1.896 + Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
1.897 + Updated contrib/visupng/cexcept.h to version 1.0.0.
1.898 + Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
1.899 +
1.900 +Version 1.0.7rc2 [June 28, 2000]
1.901 + Updated license to include disclaimers required by UCITA.
1.902 + Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.
1.903 +
1.904 +Version 1.0.7 [July 1, 2000]
1.905 + Revised the definition of "trans_values" in libpng.3/libpng.txt
1.906 +
1.907 +Version 1.0.8beta1 [July 8, 2000]
1.908 + Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.
1.909 + Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and
1.910 + pngwutil.c.
1.911 + Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h.
1.912 + Removed unused "#include <assert.h>" from png.c
1.913 + Added WindowsCE support.
1.914 + Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment.
1.915 +
1.916 +Version 1.0.8beta2 [July 10, 2000]
1.917 + Added project files to the wince directory and made further revisions
1.918 + of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE.
1.919 +
1.920 +Version 1.0.8beta3 [July 11, 2000]
1.921 + Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS()
1.922 + for indexed-color input files to avoid potential double-freeing trans array
1.923 + under some unusual conditions; problem was introduced in version 1.0.6f.
1.924 + Further revisions to pngtest.c and files in the wince subdirectory.
1.925 +
1.926 +Version 1.0.8beta4 [July 14, 2000]
1.927 + Added the files pngbar.png and pngbar.jpg to the distribution.
1.928 + Added makefile.cygwin, and cygwin support in pngconf.h
1.929 + Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory)
1.930 +
1.931 +Version 1.0.8rc1 [July 16, 2000]
1.932 + Revised png_debug() macros and statements to eliminate compiler warnings.
1.933 +
1.934 +Version 1.0.8 [July 24, 2000]
1.935 + Added png_flush() in pngwrite.c, after png_write_IEND().
1.936 + Updated makefile.hpux to build a shared library.
1.937 +
1.938 +Version 1.0.9beta1 [November 10, 2000]
1.939 + Fixed typo in scripts/makefile.hpux
1.940 + Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
1.941 + Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
1.942 + Changed "cdrom.com" in documentation to "libpng.org"
1.943 + Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).
1.944 + Changed type of "params" from voidp to png_voidp in png_read|write_png().
1.945 + Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h.
1.946 + Revised the 3 instances of WRITEFILE in pngtest.c.
1.947 + Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory.
1.948 + Updated png.rc in dll/msvc project
1.949 + Revised makefile.dec to define and use LIBPATH and INCPATH
1.950 + Increased size of global png_libpng_ver[] array from 12 to 18 chars.
1.951 + Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const.
1.952 + Removed duplicate png_crc_finish() from png_handle_bKGD() function.
1.953 + Added a warning when application calls png_read_update_info() multiple times.
1.954 + Revised makefile.cygwin
1.955 + Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.
1.956 + Replaced png_set_empty_plte_permitted() with png_permit_mng_features().
1.957 +
1.958 +Version 1.0.9beta2 [November 19, 2000]
1.959 + Renamed the "dll" subdirectory "projects".
1.960 + Added borland project files to "projects" subdirectory.
1.961 + Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.
1.962 + Add error message in png_set_compression_buffer_size() when malloc fails.
1.963 +
1.964 +Version 1.0.9beta3 [November 23, 2000]
1.965 + Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
1.966 + Removed the png_flush() in pngwrite.c that crashes some applications
1.967 + that don't set png_output_flush_fn.
1.968 + Added makefile.macosx and makefile.aix to scripts directory.
1.969 +
1.970 +Version 1.0.9beta4 [December 1, 2000]
1.971 + Change png_chunk_warning to png_warning in png_check_keyword().
1.972 + Increased the first part of msg buffer from 16 to 18 in png_chunk_error().
1.973 +
1.974 +Version 1.0.9beta5 [December 15, 2000]
1.975 + Added support for filter method 64 (for PNG datastreams embedded in MNG).
1.976 +
1.977 +Version 1.0.9beta6 [December 18, 2000]
1.978 + Revised png_set_filter() to accept filter method 64 when appropriate.
1.979 + Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to
1.980 + help prevent applications from using MNG features in PNG datastreams.
1.981 + Added png_permit_mng_features() function.
1.982 + Revised libpng.3/libpng.txt. Changed "filter type" to "filter method".
1.983 +
1.984 +Version 1.0.9rc1 [December 23, 2000]
1.985 + Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c
1.986 + Fixed error handling of unknown compression type in png_decompress_chunk().
1.987 + In pngconf.h, define __cdecl when _MSC_VER is defined.
1.988 +
1.989 +Version 1.0.9beta7 [December 28, 2000]
1.990 + Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.
1.991 + Revised memory management in png_set_hIST and png_handle_hIST in a backward
1.992 + compatible manner. PLTE and tRNS were revised similarly.
1.993 + Revised the iCCP chunk reader to ignore trailing garbage.
1.994 +
1.995 +Version 1.0.9beta8 [January 12, 2001]
1.996 + Moved pngasmrd.h into pngconf.h.
1.997 + Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
1.998 +
1.999 +Version 1.0.9beta9 [January 15, 2001]
1.1000 + Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
1.1001 + wince and msvc project module definition files.
1.1002 + Minor revision of makefile.cygwin.
1.1003 + Fixed bug with progressive reading of narrow interlaced images in pngpread.c
1.1004 +
1.1005 +Version 1.0.9beta10 [January 16, 2001]
1.1006 + Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.
1.1007 + Fixed "png_mmx_supported" typo in project definition files.
1.1008 +
1.1009 +Version 1.0.9beta11 [January 19, 2001]
1.1010 + Updated makefile.sgi to make shared library.
1.1011 + Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED
1.1012 + by default, for the benefit of DLL forward compatibility. These will
1.1013 + be re-enabled in version 1.2.0.
1.1014 +
1.1015 +Version 1.0.9rc2 [January 22, 2001]
1.1016 + Revised cygwin support.
1.1017 +
1.1018 +Version 1.0.9 [January 31, 2001]
1.1019 + Added check of cygwin's ALL_STATIC in pngconf.h
1.1020 + Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.
1.1021 +
1.1022 +Version 1.0.10beta1 [March 14, 2001]
1.1023 + Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc.
1.1024 + Reformatted libpng.3 to eliminate bad line breaks.
1.1025 + Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c
1.1026 + Added prototype for png_mmx_support() near the top of pnggccrd.c
1.1027 + Moved some error checking from png_handle_IHDR to png_set_IHDR.
1.1028 + Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros.
1.1029 + Revised png_mmx_support() function in pnggccrd.c
1.1030 + Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c
1.1031 + Fixed memory leak in contrib/visupng/PngFile.c
1.1032 + Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version)
1.1033 + Added warnings when retrieving or setting gamma=0.
1.1034 + Increased the first part of msg buffer from 16 to 18 in png_chunk_warning().
1.1035 +
1.1036 +Version 1.0.10rc1 [March 23, 2001]
1.1037 + Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy,
1.1038 + and png_strlen.
1.1039 + Revised png_mmx_supported() function in pnggccrd.c to return proper value.
1.1040 + Fixed bug in progressive reading (pngpread.c) with small images (height < 8).
1.1041 +
1.1042 +Version 1.0.10 [March 30, 2001]
1.1043 + Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin
1.1044 + Added beos project files (Chris Herborth)
1.1045 +
1.1046 +Version 1.0.11beta1 [April 3, 2001]
1.1047 + Added type casts on several png_malloc() calls (Dimitri Papadapoulos).
1.1048 + Removed a no-longer needed AIX work-around from pngconf.h
1.1049 + Changed several "//" single-line comments to C-style in pnggccrd.c
1.1050 +
1.1051 +Version 1.0.11beta2 [April 11, 2001]
1.1052 + Removed PNGAPI from several functions whose prototypes did not have PNGAPI.
1.1053 + Updated scripts/pngos2.def
1.1054 +
1.1055 +Version 1.0.11beta3 [April 14, 2001]
1.1056 + Added checking the results of many instances of png_malloc() for NULL
1.1057 +
1.1058 +Version 1.0.11beta4 [April 20, 2001]
1.1059 + Undid the changes from version 1.0.11beta3. Added a check for NULL return
1.1060 + from user's malloc_fn().
1.1061 + Removed some useless type casts of the NULL pointer.
1.1062 + Added makefile.netbsd
1.1063 +
1.1064 +Version 1.0.11 [April 27, 2001]
1.1065 + Revised makefile.netbsd
1.1066 +
1.1067 +Version 1.0.12beta1 [May 14, 2001]
1.1068 + Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot)
1.1069 + Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h
1.1070 + Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings.
1.1071 + Eliminated the png_error about apps using png_read|write_init(). Instead,
1.1072 + libpng will reallocate the png_struct and info_struct if they are too small.
1.1073 + This retains future binary compatibility for old applications written for
1.1074 + libpng-0.88 and earlier.
1.1075 +
1.1076 +Version 1.2.0beta1 [May 6, 2001]
1.1077 + Bumped DLLNUM to 2.
1.1078 + Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED
1.1079 + by default.
1.1080 + Added runtime selection of MMX features.
1.1081 + Added png_set_strip_error_numbers function and related macros.
1.1082 +
1.1083 +Version 1.2.0beta2 [May 7, 2001]
1.1084 + Finished merging 1.2.0beta1 with version 1.0.11
1.1085 + Added a check for attempts to read or write PLTE in grayscale PNG datastreams.
1.1086 +
1.1087 +Version 1.2.0beta3 [May 17, 2001]
1.1088 + Enabled user memory function by default.
1.1089 + Modified png_create_struct so it passes user mem_ptr to user memory allocator.
1.1090 + Increased png_mng_features flag from png_byte to png_uint_32.
1.1091 + Bumped shared-library (so-number) and dll-number to 3.
1.1092 +
1.1093 +Version 1.2.0beta4 [June 23, 2001]
1.1094 + Check for missing profile length field in iCCP chunk and free chunk_data
1.1095 + in case of truncated iCCP chunk.
1.1096 + Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc
1.1097 + Bumped dll-number from 2 to 3 in makefile.cygwin
1.1098 + Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly
1.1099 + if user attempts to run it on an 8-bit display.
1.1100 + Updated contrib/gregbook
1.1101 + Use png_malloc instead of png_zalloc to allocate palette in pngset.c
1.1102 + Updated makefile.ibmc
1.1103 + Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes
1.1104 + of png_write_oFFS width and height from png_uint_32 to png_int_32.
1.1105 + Updated example.c
1.1106 + Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c
1.1107 +
1.1108 +Version 1.2.0beta5 [August 8, 2001]
1.1109 + Revised contrib/gregbook
1.1110 + Revised makefile.gcmmx
1.1111 + Revised pnggccrd.c to conditionally compile some thread-unsafe code only
1.1112 + when PNG_THREAD_UNSAFE_OK is defined.
1.1113 + Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with
1.1114 + value exceeding 2^bit_depth-1
1.1115 + Revised makefile.sgi and makefile.sggcc
1.1116 + Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c
1.1117 + Removed restriction that do_invert_mono only operate on 1-bit opaque files
1.1118 +
1.1119 +Version 1.2.0 [September 1, 2001]
1.1120 + Changed a png_warning() to png_debug() in pnggccrd.c
1.1121 + Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC().
1.1122 +
1.1123 +Version 1.2.1beta1 [October 19, 2001]
1.1124 + Revised makefile.std in contrib/pngminus
1.1125 + Include background_1 in png_struct regardless of gamma support.
1.1126 + Revised makefile.netbsd and makefile.macosx, added makefile.darwin.
1.1127 + Revised example.c to provide more details about using row_callback().
1.1128 +
1.1129 +Version 1.2.1beta2 [October 25, 2001]
1.1130 + Added type cast to each NULL appearing in a function call, except for
1.1131 + WINCE functions.
1.1132 + Added makefile.so9.
1.1133 +
1.1134 +Version 1.2.1beta3 [October 27, 2001]
1.1135 + Removed type casts from all NULLs.
1.1136 + Simplified png_create_struct_2().
1.1137 +
1.1138 +Version 1.2.1beta4 [November 7, 2001]
1.1139 + Revised png_create_info_struct() and png_creat_struct_2().
1.1140 + Added error message if png_write_info() was omitted.
1.1141 + Type cast NULLs appearing in function calls when _NO_PROTO or
1.1142 + PNG_TYPECAST_NULL is defined.
1.1143 +
1.1144 +Version 1.2.1rc1 [November 24, 2001]
1.1145 + Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL
1.1146 + is defined.
1.1147 + Changed typecast of "size" argument to png_size_t in pngmem.c calls to
1.1148 + the user malloc_fn, to agree with the prototype in png.h
1.1149 + Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev)
1.1150 + Updated makefile.sgi to recognize LIBPATH and INCPATH.
1.1151 + Updated various makefiles so "make clean" does not remove previous major
1.1152 + version of the shared library.
1.1153 +
1.1154 +Version 1.2.1rc2 [December 4, 2001]
1.1155 + Always allocate 256-entry internal palette, hist, and trans arrays, to
1.1156 + avoid out-of-bounds memory reference caused by invalid PNG datastreams.
1.1157 + Added a check for prefix_length > data_length in iCCP chunk handler.
1.1158 +
1.1159 +Version 1.2.1 [December 7, 2001]
1.1160 + None.
1.1161 +
1.1162 +Version 1.2.2beta1 [February 22, 2002]
1.1163 + Fixed a bug with reading the length of iCCP profiles (Larry Reeves).
1.1164 + Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate
1.1165 + libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h
1.1166 + Revised makefile.darwin to remove "-undefined suppress" option.
1.1167 + Added checks for gamma and chromaticity values over 21474.83, which exceed
1.1168 + the limit for PNG unsigned 32-bit integers when encoded.
1.1169 + Revised calls to png_create_read_struct() and png_create_write_struct()
1.1170 + for simpler debugging.
1.1171 + Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK)
1.1172 +
1.1173 +Version 1.2.2beta2 [February 23, 2002]
1.1174 + Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths.
1.1175 + Check for invalid image dimensions in png_get_IHDR.
1.1176 + Added missing "fi;" in the install target of the SGI makefiles.
1.1177 + Added install-static to all makefiles that make shared libraries.
1.1178 + Always do gamma compensation when image is partially transparent.
1.1179 +
1.1180 +Version 1.2.2beta3 [March 7, 2002]
1.1181 + Compute background.gray and background_1.gray even when color_type is RGB
1.1182 + in case image gets reduced to gray later.
1.1183 + Modified shared-library makefiles to install pkgconfig/libpngNN.pc.
1.1184 + Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown
1.1185 + Removed unused png_write_destroy_info prototype from png.h
1.1186 + Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case
1.1187 + Added install-shared target to all makefiles that make shared libraries.
1.1188 + Stopped a double free of palette, hist, and trans when not using free_me.
1.1189 + Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64.
1.1190 +
1.1191 +Version 1.2.2beta4 [March 8, 2002]
1.1192 + Compute background.gray and background_1.gray even when color_type is RGB
1.1193 + in case image gets reduced to gray later (Jason Summers).
1.1194 + Relocated a misplaced /bin/rm in the "install-shared" makefile targets
1.1195 + Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library.
1.1196 +
1.1197 +Version 1.2.2beta5 [March 26, 2002]
1.1198 + Added missing PNGAPI to several function definitions.
1.1199 + Check for invalid bit_depth or color_type in png_get_IHDR(), and
1.1200 + check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen).
1.1201 + Revised iTXt support to accept NULL for lang and lang_key.
1.1202 + Compute gamma for color components of background even when color_type is gray.
1.1203 + Changed "()" to "{}" in scripts/libpng.pc.in.
1.1204 + Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN
1.1205 + Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so
1.1206 +
1.1207 +Version 1.2.2beta6 [March 31, 2002]
1.1208 +
1.1209 +Version 1.0.13beta1 [March 31, 2002]
1.1210 + Prevent png_zalloc() from trying to memset memory that it failed to acquire.
1.1211 + Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate).
1.1212 + Ensure that the right function (user or default) is used to free the
1.1213 + png_struct after an error in png_create_read_struct_2().
1.1214 +
1.1215 +Version 1.2.2rc1 [April 7, 2002]
1.1216 +
1.1217 +Version 1.0.13rc1 [April 7, 2002]
1.1218 + Save the ebx register in pnggccrd.c (Sami Farin)
1.1219 + Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner).
1.1220 + Updated makefiles to put headers in include/libpng and remove old include/*.h.
1.1221 +
1.1222 +Version 1.2.2 [April 15, 2002]
1.1223 +
1.1224 +Version 1.0.13 [April 15, 2002]
1.1225 + Revised description of png_set_filter() in libpng.3/libpng.txt.
1.1226 + Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd
1.1227 +
1.1228 +Version 1.0.13patch01 [April 17, 2002]
1.1229 +
1.1230 +Version 1.2.2patch01 [April 17, 2002]
1.1231 + Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and
1.1232 + makefile.sggcc
1.1233 + Fixed VER -> PNGVER typo in makefile.macosx and added install-static to
1.1234 + install
1.1235 + Added install: target to makefile.32sunu and makefile.64sunu
1.1236 +
1.1237 +Version 1.0.13patch03 [April 18, 2002]
1.1238 +
1.1239 +Version 1.2.2patch03 [April 18, 2002]
1.1240 + Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng
1.1241 + subdirectory to libpngNN subdirectory without the full pathname.
1.1242 + Moved generation of libpng.pc from "install" to "all" in 15 makefiles.
1.1243 +
1.1244 +Version 1.2.3rc1 [April 28, 2002]
1.1245 + Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos).
1.1246 + Added $(DESTDIR) feature to 24 makefiles (Tim Mooney)
1.1247 + Fixed bug with $prefix, should be $(prefix) in makefile.hpux.
1.1248 + Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin
1.1249 + Added a link from libpngNN.pc to libpng.pc in 15 makefiles.
1.1250 + Added links from include/libpngNN/*.h to include/*.h in 24 makefiles.
1.1251 + Revised makefile.darwin to make relative links without full pathname.
1.1252 + Added setjmp() at the end of png_create_*_struct_2() in case user forgets
1.1253 + to put one in their application.
1.1254 + Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and
1.1255 + removed them from module definition files.
1.1256 +
1.1257 +Version 1.2.3rc2 [May 1, 2002]
1.1258 + Fixed bug in reporting number of channels in pngget.c and pngset.c,
1.1259 + that was introduced in version 1.2.2beta5.
1.1260 + Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(),
1.1261 + png_default_flush(), and png_push_fill_buffer() and included them in
1.1262 + module definition files.
1.1263 + Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles.
1.1264 +
1.1265 +Version 1.2.3rc3 [May 1, 2002]
1.1266 + Revised prototype for png_default_flush()
1.1267 + Remove old libpng.pc and libpngNN.pc before installing new ones.
1.1268 +
1.1269 +Version 1.2.3rc4 [May 2, 2002]
1.1270 + Typos in *.def files (png_default_read|write -> png_default_read|write_data)
1.1271 + In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc
1.1272 + Added libpng-config and libpngNN-config and modified makefiles to install
1.1273 + them.
1.1274 + Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles
1.1275 + Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp
1.1276 +
1.1277 +Version 1.2.3rc5 [May 11, 2002]
1.1278 + Changed "error" and "message" in prototypes to "error_message" and
1.1279 + "warning_message" to avoid namespace conflict.
1.1280 + Revised 15 makefiles to build libpng-config from libpng-config-*.in
1.1281 + Once more restored png_zalloc and png_zfree to regular nonexported form.
1.1282 + Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer
1.1283 + to nonexported form, but with PNGAPI, and removed them from module def
1.1284 + files.
1.1285 +
1.1286 +Version 1.2.3rc6 [May 14, 2002]
1.1287 + Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c
1.1288 + Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp.
1.1289 + Removed leftover libpng-config "sed" script from four makefiles.
1.1290 + Revised libpng-config creating script in 16 makefiles.
1.1291 +
1.1292 +Version 1.2.3 [May 22, 2002]
1.1293 + Revised libpng-config target in makefile.cygwin.
1.1294 + Removed description of png_set_mem_fn() from documentation.
1.1295 + Revised makefile.freebsd.
1.1296 + Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR).
1.1297 + Revised projects/msvc/README.txt
1.1298 + Changed -lpng to -lpngNN in LDFLAGS in several makefiles.
1.1299 +
1.1300 +Version 1.2.4beta1 [May 24, 2002]
1.1301 + Added libpng.pc and libpng-config to "all:" target in 16 makefiles.
1.1302 + Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH)
1.1303 + Added missing "\" before closing double quote in makefile.gcmmx.
1.1304 + Plugged various memory leaks; added png_malloc_warn() and png_set_text_2()
1.1305 + functions.
1.1306 +
1.1307 +Version 1.2.4beta2 [June 25, 2002]
1.1308 + Plugged memory leak of png_ptr->current_text (Matt Holgate).
1.1309 + Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison)
1.1310 + Added -soname to the loader flags in makefile.dec, makefile.sgi, and
1.1311 + makefile.sggcc.
1.1312 + Added "test-installed" target to makefile.linux, makefile.gcmmx,
1.1313 + makefile.sgi, and makefile.sggcc.
1.1314 +
1.1315 +Version 1.2.4beta3 [June 28, 2002]
1.1316 + Plugged memory leak of row_buf in pngtest.c when there is a png_error().
1.1317 + Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.
1.1318 + Added "test-installed" target to makefile.32sunu, makefile.64sunu,
1.1319 + makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,
1.1320 + makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.
1.1321 +
1.1322 +Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
1.1323 + Added "test-installed" target to makefile.cygwin and makefile.sco.
1.1324 + Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro.
1.1325 +
1.1326 +Version 1.2.4 and 1.0.14 [July 8, 2002]
1.1327 + Changed png_warning() to png_error() when width is too large to process.
1.1328 +
1.1329 +Version 1.2.4patch01 [July 20, 2002]
1.1330 + Revised makefile.cygwin to use DLL number 12 instead of 13.
1.1331 +
1.1332 +Version 1.2.5beta1 [August 6, 2002]
1.1333 + Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
1.1334 + Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
1.1335 + Removed some stray *.o files from contrib/gregbook.
1.1336 + Changed png_error() to png_warning() about "Too much data" in pngpread.c
1.1337 + and about "Extra compressed data" in pngrutil.c.
1.1338 + Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
1.1339 + Updated makefile.hpgcc
1.1340 + Updated png.c and pnggccrd.c handling of return from png_mmx_support()
1.1341 +
1.1342 +Version 1.2.5beta2 [August 15, 2002]
1.1343 + Only issue png_warning() about "Too much data" in pngpread.c when avail_in
1.1344 + is nonzero.
1.1345 + Updated makefiles to install a separate libpng.so.3 with its own rpath.
1.1346 +
1.1347 +Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
1.1348 + Revised makefiles to not remove previous minor versions of shared libraries.
1.1349 +
1.1350 +Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
1.1351 + Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
1.1352 + library loader directive.
1.1353 + Added missing "$OBJSDLL" line to makefile.gcmmx.
1.1354 + Added missing "; fi" to makefile.32sunu.
1.1355 +
1.1356 +Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
1.1357 + Revised libpng-config script.
1.1358 +
1.1359 +Version 1.2.5 and 1.0.15 [October 3, 2002]
1.1360 + Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,
1.1361 + and makefile.aix.
1.1362 + Relocated two misplaced PNGAPI lines in pngtest.c
1.1363 +
1.1364 +Version 1.2.6beta1 [October 22, 2002]
1.1365 + Commented out warning about uninitialized mmx_support in pnggccrd.c.
1.1366 + Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.
1.1367 + Relocated two more misplaced PNGAPI lines in pngtest.c
1.1368 + Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams,
1.1369 + introduced in version 1.0.2.
1.1370 + Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu.
1.1371 +
1.1372 +Version 1.2.6beta2 [November 1, 2002]
1.1373 + Added libpng-config "--ldopts" output.
1.1374 + Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)"
1.1375 + in makefiles.
1.1376 +
1.1377 +Version 1.2.6beta3 [July 18, 2004]
1.1378 + Reverted makefile changes from version 1.2.6beta2 and some of the changes
1.1379 + from version 1.2.6beta1; these will be postponed until version 1.2.7.
1.1380 + Version 1.2.6 is going to be a simple bugfix release.
1.1381 + Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile.
1.1382 + Fixed potential overrun in pngerror.c by using strncpy instead of memcpy.
1.1383 + Added "#!/bin/sh" at the top of configure, for recognition of the
1.1384 + 'x' flag under Cygwin (Cosmin).
1.1385 + Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin).
1.1386 + Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin).
1.1387 + Fixed the special memory handler for Borland C under DOS, in pngmem.c
1.1388 + (Cosmin).
1.1389 + Removed some spurious assignments in pngrutil.c (Cosmin).
1.1390 + Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings
1.1391 + on 16-bit platforms (Cosmin).
1.1392 + Enclosed shift op expressions in parentheses, to silence warnings (Cosmin).
1.1393 + Used proper type png_fixed_point, to avoid problems on 16-bit platforms,
1.1394 + in png_handle_sRGB() (Cosmin).
1.1395 + Added compression_type to png_struct, and optimized the window size
1.1396 + inside the deflate stream (Cosmin).
1.1397 + Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin).
1.1398 + Fixed handling of unknown chunks that come after IDAT (Cosmin).
1.1399 + Allowed png_error() and png_warning() to work even if png_ptr == NULL
1.1400 + (Cosmin).
1.1401 + Replaced row_info->rowbytes with row_bytes in png_write_find_filter()
1.1402 + (Cosmin).
1.1403 + Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre).
1.1404 + Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded
1.1405 + values in png.c (Simon-Pierre, Cosmin).
1.1406 + Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre).
1.1407 + Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc
1.1408 + (Simon-Pierre).
1.1409 + Moved the definition of PNG_HEADER_VERSION_STRING near the definitions
1.1410 + of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin).
1.1411 + Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin).
1.1412 + Updated scripts/makefile.vc(a)win32 (Cosmin).
1.1413 + Updated the MSVC project (Simon-Pierre, Cosmin).
1.1414 + Updated the Borland C++ Builder project (Cosmin).
1.1415 + Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin).
1.1416 + Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin).
1.1417 + Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin).
1.1418 + Added extra guard around inclusion of Turbo C memory headers, in pngconf.h
1.1419 + (Cosmin).
1.1420 + Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to
1.1421 + projects/cbuilder5/ (Cosmin).
1.1422 + Moved projects/visualc6/png32ms.def to scripts/pngw32.def,
1.1423 + and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin).
1.1424 + Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin).
1.1425 + Changed line endings to DOS style in cbuilder5 and visualc6 files, even
1.1426 + in the tar.* distributions (Cosmin).
1.1427 + Updated contrib/visupng/VisualPng.dsp (Cosmin).
1.1428 + Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin).
1.1429 + Added a separate distribution with "configure" and supporting files (Junichi).
1.1430 +
1.1431 +Version 1.2.6beta4 [July 28, 2004]
1.1432 + Added user ability to change png_size_t via a PNG_SIZE_T macro.
1.1433 + Added png_sizeof() and png_convert_size() functions.
1.1434 + Added PNG_SIZE_MAX (maximum value of a png_size_t variable.
1.1435 + Added check in png_malloc_default() for (size_t)size != (png_uint_32)size
1.1436 + which would indicate an overflow.
1.1437 + Changed sPLT failure action from png_error to png_warning and abandon chunk.
1.1438 + Changed sCAL and iCCP failures from png_error to png_warning and abandon.
1.1439 + Added png_get_uint_31(png_ptr, buf) function.
1.1440 + Added PNG_UINT_32_MAX macro.
1.1441 + Renamed PNG_MAX_UINT to PNG_UINT_31_MAX.
1.1442 + Made png_zalloc() issue a png_warning and return NULL on potential
1.1443 + overflow.
1.1444 + Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x
1.1445 + Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4.
1.1446 + Revised Borland portion of png_malloc() to return NULL or issue
1.1447 + png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK.
1.1448 + Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove
1.1449 + sequential read support.
1.1450 + Added some "#if PNG_WRITE_SUPPORTED" blocks.
1.1451 + Added #ifdef to remove some redundancy in png_malloc_default().
1.1452 + Use png_malloc instead of png_zalloc to allocate the pallete.
1.1453 +
1.1454 +Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
1.1455 + Fixed buffer overflow vulnerability in png_handle_tRNS()
1.1456 + Fixed integer arithmetic overflow vulnerability in png_read_png().
1.1457 + Fixed some harmless bugs in png_handle_sBIT, etc, that would cause
1.1458 + duplicate chunk types to go undetected.
1.1459 + Fixed some timestamps in the -config version
1.1460 + Rearranged order of processing of color types in png_handle_tRNS().
1.1461 + Added ROWBYTES macro to calculate rowbytes without integer overflow.
1.1462 + Updated makefile.darwin and removed makefile.macosx from scripts directory.
1.1463 + Imposed default one million column, one-million row limits on the image
1.1464 + dimensions, and added png_set_user_limits() function to override them.
1.1465 + Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro.
1.1466 + Fixed wrong cast of returns from png_get_user_width|height_max().
1.1467 + Changed some "keep the compiler happy" from empty statements to returns,
1.1468 + Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution
1.1469 +
1.1470 +Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004]
1.1471 + Revised makefile.darwin and makefile.solaris. Removed makefile.macosx.
1.1472 + Revised pngtest's png_debug_malloc() to use png_malloc() instead of
1.1473 + png_malloc_default() which is not supposed to be exported.
1.1474 + Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in
1.1475 + pngpread.c. Bug was introduced in 1.2.6rc1.
1.1476 + Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1.
1.1477 + Fixed old bug in RGB to Gray transformation.
1.1478 + Fixed problem with 64-bit compilers by casting arguments to abs()
1.1479 + to png_int_32.
1.1480 + Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9).
1.1481 + Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin)
1.1482 + Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles.
1.1483 + Added code to update the row_info->colortype in png_do_read_filler() (MSB).
1.1484 +
1.1485 +Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004]
1.1486 + Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid
1.1487 + trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro.
1.1488 + Revised documentation of png_set_keep_unknown_chunks().
1.1489 + Check handle_as_unknown status in pngpread.c, as in pngread.c previously.
1.1490 + Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h
1.1491 + Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c
1.1492 +
1.1493 +Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004]
1.1494 + Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of
1.1495 + "pinfo" was out of place).
1.1496 +
1.1497 +Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]
1.1498 + Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED
1.1499 + section of png.h where they were inadvertently placed in version rc3.
1.1500 +
1.1501 +Version 1.2.6 and 1.0.16 [August 15, 2004]
1.1502 + Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.
1.1503 +
1.1504 +Version 1.2.7beta1 [August 26, 2004]
1.1505 + Removed unused pngasmrd.h file.
1.1506 + Removed references to uu.net for archived files. Added references to
1.1507 + PNG Spec (second edition) and the PNG ISO/IEC Standard.
1.1508 + Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR.
1.1509 + Fixed bug with "optimized window size" in the IDAT datastream, that
1.1510 + causes libpng to write PNG files with incorrect zlib header bytes.
1.1511 +
1.1512 +Version 1.2.7beta2 [August 28, 2004]
1.1513 + Fixed bug with sCAL chunk and big-endian machines (David Munro).
1.1514 + Undid new code added in 1.2.6rc2 to update the color_type in
1.1515 + png_set_filler().
1.1516 + Added png_set_add_alpha() that updates color type.
1.1517 +
1.1518 +Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]
1.1519 + Revised png_set_strip_filler() to not remove alpha if color_type has alpha.
1.1520 +
1.1521 +Version 1.2.7 and 1.0.17 [September 12, 2004]
1.1522 + Added makefile.hp64
1.1523 + Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin
1.1524 +
1.1525 +Version 1.2.8beta1 [November 1, 2004]
1.1526 + Fixed bug in png_text_compress() that would fail to complete a large block.
1.1527 + Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
1.1528 + strip alpha operation in png_do_strip_filler().
1.1529 + Added PNG_1_2_X definition in pngconf.h
1.1530 + Use #ifdef to comment out png_info_init in png.c and png_read_init in
1.1531 + pngread.c (as of 1.3.0)
1.1532 +
1.1533 +Version 1.2.8beta2 [November 2, 2004]
1.1534 + Reduce color_type to a nonalpha type after strip alpha operation in
1.1535 + png_do_strip_filler().
1.1536 +
1.1537 +Version 1.2.8beta3 [November 3, 2004]
1.1538 + Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM
1.1539 +
1.1540 +Version 1.2.8beta4 [November 12, 2004]
1.1541 + Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).
1.1542 + Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).
1.1543 + Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection
1.1544 + of data type in deflate (Cosmin).
1.1545 + Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of
1.1546 + PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
1.1547 +
1.1548 +Version 1.2.8beta5 [November 20, 2004]
1.1549 + Use png_ptr->flags instead of png_ptr->transformations to pass
1.1550 + PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI
1.1551 + compatibility.
1.1552 + Revised handling of SPECIALBUILD, PRIVATEBUILD,
1.1553 + PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
1.1554 +
1.1555 +Version 1.2.8rc1 [November 24, 2004]
1.1556 + Moved handling of BUILD macros from pngconf.h to png.h
1.1557 + Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently
1.1558 + omitted from beta5.
1.1559 + Revised scripts/pngw32.rc
1.1560 + Despammed mailing addresses by masking "@" with "at".
1.1561 + Inadvertently installed a supposedly faster test version of pngrutil.c
1.1562 +
1.1563 +Version 1.2.8rc2 [November 26, 2004]
1.1564 + Added two missing "\" in png.h
1.1565 + Change tests in pngread.c and pngpread.c to
1.1566 + if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
1.1567 + png_do_read_transformations(png_ptr);
1.1568 +
1.1569 +Version 1.2.8rc3 [November 28, 2004]
1.1570 + Reverted pngrutil.c to version libpng-1.2.8beta5.
1.1571 + Added scripts/makefile.elf with supporting code in pngconf.h for symbol
1.1572 + versioning (John Bowler).
1.1573 +
1.1574 +Version 1.2.8rc4 [November 29, 2004]
1.1575 + Added projects/visualc7 (Simon-pierre).
1.1576 +
1.1577 +Version 1.2.8rc5 [November 29, 2004]
1.1578 + Fixed new typo in scripts/pngw32.rc
1.1579 +
1.1580 +Version 1.2.8 [December 3, 2004]
1.1581 + Removed projects/visualc7, added projects/visualc71.
1.1582 +
1.1583 +Version 1.2.9beta1 [February 21, 2006]
1.1584 + Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints
1.1585 + Revised man page and libpng.txt to make it clear that one should not call
1.1586 + png_read_end or png_write_end after png_read_png or png_write_png.
1.1587 + Updated references to png-mng-implement mailing list.
1.1588 + Fixed an incorrect typecast in pngrutil.c
1.1589 + Added PNG_NO_READ_SUPPORTED conditional for making a write-only library.
1.1590 + Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional.
1.1591 + Optimized alpha-inversion loops in pngwtran.c
1.1592 + Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c
1.1593 + Make sure num_trans is <= 256 before copying data in png_set_tRNS().
1.1594 + Make sure num_palette is <= 256 before copying data in png_set_PLTE().
1.1595 + Interchanged order of write_swap_alpha and write_invert_alpha transforms.
1.1596 + Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).
1.1597 + Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin).
1.1598 + Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin).
1.1599 + Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16,
1.1600 + png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin).
1.1601 + Added type cast (png_byte) in png_write_sCAL() (Cosmin).
1.1602 + Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin).
1.1603 + Default iTXt support was inadvertently enabled.
1.1604 +
1.1605 +Version 1.2.9beta2 [February 21, 2006]
1.1606 + Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
1.1607 + checking for png_read_dither in pngrtran.c
1.1608 + Revised checking of chromaticity limits to accommodate extended RGB
1.1609 + colorspace (John Denker).
1.1610 + Changed line endings in some of the project files to CRLF, even in the
1.1611 + "Unix" tar distributions (Cosmin).
1.1612 + Made png_get_int_32 and png_save_int_32 always available (Cosmin).
1.1613 + Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def
1.1614 + with the newly exported functions.
1.1615 + Eliminated distributions without the "configure" script.
1.1616 + Updated INSTALL instructions.
1.1617 +
1.1618 +Version 1.2.9beta3 [February 24, 2006]
1.1619 + Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp
1.1620 + Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)
1.1621 + Removed reference to pngasmrd.h from Makefile.am
1.1622 + Renamed CHANGES to ChangeLog.
1.1623 + Renamed LICENSE to COPYING.
1.1624 + Renamed ANNOUNCE to NEWS.
1.1625 + Created AUTHORS file.
1.1626 +
1.1627 +Version 1.2.9beta4 [March 3, 2006]
1.1628 + Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
1.1629 + Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
1.1630 + Removed newline from the end of some error and warning messages.
1.1631 + Removed test for sqrt() from configure.ac and configure.
1.1632 + Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).
1.1633 + Disabled default iTXt support that was inadvertently enabled in
1.1634 + libpng-1.2.9beta1.
1.1635 + Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
1.1636 + Removed libpng version and date from *.c files.
1.1637 +
1.1638 +Version 1.2.9beta5 [March 4, 2006]
1.1639 + Removed trailing blanks from source files.
1.1640 + Put version and date of latest change in each source file, and changed
1.1641 + copyright year accordingly.
1.1642 + More cleanup of configure.ac, Makefile.am, and associated scripts.
1.1643 + Restored scripts/makefile.elf which was inadvertently deleted.
1.1644 +
1.1645 +Version 1.2.9beta6 [March 6, 2006]
1.1646 + Fixed typo (RELEASE) in configuration files.
1.1647 +
1.1648 +Version 1.2.9beta7 [March 7, 2006]
1.1649 + Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
1.1650 + Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()
1.1651 + in png.h.
1.1652 + Updated makefile.elf as suggested by debian.
1.1653 + Made cosmetic changes to some makefiles, adding LN_SF and other macros.
1.1654 + Made some makefiles accept "exec_prefix".
1.1655 +
1.1656 +Version 1.2.9beta8 [March 9, 2006]
1.1657 + Fixed some "#if defined (..." which should be "#if defined(..."
1.1658 + Bug introduced in libpng-1.2.8.
1.1659 + Fixed inconsistency in definition of png_default_read_data()
1.1660 + Restored blank that was lost from makefile.sggcc "clean" target in beta7.
1.1661 + Revised calculation of "current" and "major" for irix in ltmain.sh
1.1662 + Changed "mkdir" to "MKDIR_P" in some makefiles.
1.1663 + Separated PNG_EXPAND and PNG_EXPAND_tRNS.
1.1664 + Added png_set_expand_gray_1_2_4_to_8() and deprecated
1.1665 + png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.
1.1666 +
1.1667 +Version 1.2.9beta9 [March 10, 2006]
1.1668 + Include "config.h" in pngconf.h when available.
1.1669 + Added some checks for NULL png_ptr or NULL info_ptr (timeless)
1.1670 +
1.1671 +Version 1.2.9beta10 [March 20, 2006]
1.1672 + Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)
1.1673 + Made pnggccrd.c PIC-compliant (Christian Aichinger).
1.1674 + Added makefile.mingw (Wolfgang Glas).
1.1675 + Revised pngconf.h MMX checking.
1.1676 +
1.1677 +Version 1.2.9beta11 [March 22, 2006]
1.1678 + Fixed out-of-order declaration in pngwrite.c that was introduced in beta9
1.1679 + Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.
1.1680 +
1.1681 +Version 1.2.9rc1 [March 31, 2006]
1.1682 + Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).
1.1683 + Removed nonsensical assertion check from pngtest.c (Cosmin).
1.1684 +
1.1685 +Version 1.2.9 [April 14, 2006]
1.1686 + Revised makefile.beos and added "none" selector in ltmain.sh
1.1687 +
1.1688 +Version 1.2.10beta1 [April 15, 2006]
1.1689 + Renamed "config.h" to "png_conf.h" and revised Makefile.am to add
1.1690 + -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h
1.1691 + to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.
1.1692 +
1.1693 +Version 1.2.10beta2 [April 15, 2006]
1.1694 + Manually updated Makefile.in and configure. Changed png_conf.h.in
1.1695 + back to config.h.
1.1696 +
1.1697 +Version 1.2.10beta3 [April 15, 2006]
1.1698 + Change png_conf.h back to config.h in pngconf.h.
1.1699 +
1.1700 +Version 1.2.10beta4 [April 16, 2006]
1.1701 + Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.
1.1702 +
1.1703 +Version 1.2.10beta5 [April 16, 2006]
1.1704 + Added a configure check for compiling assembler code in pnggccrd.c
1.1705 +
1.1706 +Version 1.2.10beta6 [April 17, 2006]
1.1707 + Revised the configure check for pnggccrd.c
1.1708 + Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@
1.1709 + Added @LIBPNG_DEFINES@ to arguments when building libpng.sym
1.1710 +
1.1711 +Version 1.2.10beta7 [April 18, 2006]
1.1712 + Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.
1.1713 +
1.1714 +Version 1.2.10rc1 [April 19, 2006]
1.1715 + Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD
1.1716 + Fixed "LN_FS" typo in makefile.sco and makefile.solaris.
1.1717 +
1.1718 +Version 1.2.10rc2 [April 20, 2006]
1.1719 + Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE
1.1720 + in configure.ac and configure
1.1721 + Made the configure warning about versioned symbols less arrogant.
1.1722 +
1.1723 +Version 1.2.10rc3 [April 21, 2006]
1.1724 + Added a note in libpng.txt that png_set_sig_bytes(8) can be used when
1.1725 + writing an embedded PNG without the 8-byte signature.
1.1726 + Revised makefiles and configure to avoid making links to libpng.so.*
1.1727 +
1.1728 +Version 1.2.10 [April 23, 2006]
1.1729 + Reverted configure to "rc2" state.
1.1730 +
1.1731 +Version 1.2.11beta1 [May 31, 2006]
1.1732 + scripts/libpng.pc.in contained "configure" style version info and would
1.1733 + not work with makefiles.
1.1734 + The shared-library makefiles were linking to libpng.so.0 instead of
1.1735 + libpng.so.3 compatibility as the library.
1.1736 +
1.1737 +Version 1.2.11beta2 [June 2, 2006]
1.1738 + Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1.1739 + buffer overflow.
1.1740 + Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb)
1.1741 +
1.1742 +Version 1.2.11beta3 [June 5, 2006]
1.1743 + Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin).
1.1744 + Removed the accidental leftover Makefile.in~ (Cosmin).
1.1745 + Avoided potential buffer overflow and optimized buffer in
1.1746 + png_write_sCAL(), png_write_sCAL_s() (Cosmin).
1.1747 + Removed the include directories and libraries from CFLAGS and LDFLAGS
1.1748 + in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin).
1.1749 +
1.1750 +Version 1.2.11beta4 [June 6, 2006]
1.1751 + Allow zero-length IDAT chunks after the entire zlib datastream, but not
1.1752 + after another intervening chunk type.
1.1753 +
1.1754 +Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]
1.1755 + Deleted extraneous square brackets from [config.h] in configure.ac
1.1756 +
1.1757 +Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]
1.1758 + Added prototypes for PNG_INCH_CONVERSIONS functions to png.h
1.1759 + Revised INSTALL and autogen.sh
1.1760 + Fixed typo in several makefiles (-W1 should be -Wl)
1.1761 + Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
1.1762 +
1.1763 +Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]
1.1764 + Removed the new typedefs for 64-bit systems (delay until version 1.4.0)
1.1765 + Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid
1.1766 + reading out of bounds.
1.1767 +
1.1768 +Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]
1.1769 + Really removed the new typedefs for 64-bit systems.
1.1770 +
1.1771 +Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]
1.1772 + Removed png_sig_bytes entry from scripts/pngw32.def
1.1773 +
1.1774 +Version 1.0.19, 1.2.11 [June 26, 2006]
1.1775 + None.
1.1776 +
1.1777 +Version 1.0.20, 1.2.12 [June 27, 2006]
1.1778 + Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1.1779 + buffer overflow.
1.1780 +
1.1781 +Version 1.2.13beta1 [October 2, 2006]
1.1782 + Removed AC_FUNC_MALLOC from configure.ac
1.1783 + Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
1.1784 + Change "logical" to "bitwise" throughout documentation.
1.1785 + Detect and fix attempt to write wrong iCCP profile length (CVE-2006-7244)
1.1786 +
1.1787 +Version 1.0.21, 1.2.13 [November 14, 2006]
1.1788 + Fix potential buffer overflow in sPLT chunk handler.
1.1789 + Fix Makefile.am to not try to link to noexistent files.
1.1790 + Check all exported functions for NULL png_ptr.
1.1791 +
1.1792 +Version 1.2.14beta1 [November 17, 2006]
1.1793 + Relocated three misplaced tests for NULL png_ptr.
1.1794 + Built Makefile.in with automake-1.9.6 instead of 1.9.2.
1.1795 + Build configure with autoconf-2.60 instead of 2.59
1.1796 +
1.1797 +Version 1.2.14beta2 [November 17, 2006]
1.1798 + Added some typecasts in png_zalloc().
1.1799 +
1.1800 +Version 1.2.14rc1 [November 20, 2006]
1.1801 + Changed "strtod" to "png_strtod" in pngrutil.c
1.1802 +
1.1803 +Version 1.0.22, 1.2.14 [November 27, 2006]
1.1804 + Added missing "$(srcdir)" in Makefile.am and Makefile.in
1.1805 +
1.1806 +Version 1.2.15beta1 [December 3, 2006]
1.1807 + Generated configure with autoconf-2.61 instead of 2.60
1.1808 + Revised configure.ac to update libpng.pc and libpng-config.
1.1809 +
1.1810 +Version 1.2.15beta2 [December 3, 2006]
1.1811 + Always export MMX asm functions, just stubs if not building pnggccrd.c
1.1812 +
1.1813 +Version 1.2.15beta3 [December 4, 2006]
1.1814 + Add "png_bytep" typecast to profile while calculating length in pngwutil.c
1.1815 +
1.1816 +Version 1.2.15beta4 [December 7, 2006]
1.1817 + Added scripts/CMakeLists.txt
1.1818 + Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta
1.1819 +
1.1820 +Version 1.2.15beta5 [December 7, 2006]
1.1821 + Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c
1.1822 + Revised scripts/CMakeLists.txt
1.1823 +
1.1824 +Version 1.2.15beta6 [December 13, 2006]
1.1825 + Revised scripts/CMakeLists.txt and configure.ac
1.1826 +
1.1827 +Version 1.2.15rc1 [December 18, 2006]
1.1828 + Revised scripts/CMakeLists.txt
1.1829 +
1.1830 +Version 1.2.15rc2 [December 21, 2006]
1.1831 + Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
1.1832 + Added scripts/makefile.nommx
1.1833 +
1.1834 +Version 1.2.15rc3 [December 25, 2006]
1.1835 + Fixed shared library numbering error that was introduced in 1.2.15beta6.
1.1836 +
1.1837 +Version 1.2.15rc4 [December 27, 2006]
1.1838 + Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.
1.1839 +
1.1840 +Version 1.2.15rc5 [December 31, 2006]
1.1841 + Revised handling of rgb_to_gray.
1.1842 +
1.1843 +Version 1.2.15 [January 5, 2007]
1.1844 + Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
1.1845 +
1.1846 +Version 1.2.16beta1 [January 6, 2007]
1.1847 + Fix bugs in makefile.nommx
1.1848 +
1.1849 +Version 1.2.16beta2 [January 16, 2007]
1.1850 + Revised scripts/CMakeLists.txt
1.1851 +
1.1852 +Version 1.2.16 [January 31, 2007]
1.1853 + No changes.
1.1854 +
1.1855 +Version 1.2.17beta1 [March 6, 2007]
1.1856 + Revised scripts/CMakeLists.txt to install both shared and static libraries.
1.1857 + Deleted a redundant line from pngset.c.
1.1858 +
1.1859 +Version 1.2.17beta2 [April 26, 2007]
1.1860 + Relocated misplaced test for png_ptr == NULL in pngpread.c
1.1861 + Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN
1.1862 + flags.
1.1863 + Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_*
1.1864 + Added pngerror() when write_IHDR fails in deflateInit2().
1.1865 + Added "const" to some array declarations.
1.1866 + Mention examples of libpng usage in the libpng*.txt and libpng.3 documents.
1.1867 +
1.1868 +Version 1.2.17rc1 [May 4, 2007]
1.1869 + No changes.
1.1870 +
1.1871 +Version 1.2.17rc2 [May 8, 2007]
1.1872 + Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications
1.1873 + calling set_unknown_chunk_location() need them.
1.1874 + Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in
1.1875 + png_set_expand_gray_1_2_4_to_8().
1.1876 + Added png_ptr->unknown_chunk to hold working unknown chunk data, so it
1.1877 + can be free'ed in case of error. Revised unknown chunk handling in
1.1878 + pngrutil.c and pngpread.c to use this structure.
1.1879 +
1.1880 +Version 1.2.17rc3 [May 8, 2007]
1.1881 + Revised symbol-handling in configure script.
1.1882 +
1.1883 +Version 1.2.17rc4 [May 10, 2007]
1.1884 + Revised unknown chunk handling to avoid storing unknown critical chunks.
1.1885 +
1.1886 +Version 1.0.25 [May 15, 2007]
1.1887 +Version 1.2.17 [May 15, 2007]
1.1888 + Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,
1.1889 + to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664)
1.1890 +
1.1891 +Version 1.0.26 [May 15, 2007]
1.1892 +Version 1.2.18 [May 15, 2007]
1.1893 + Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script
1.1894 +
1.1895 +Version 1.2.19beta1 [May 18, 2007]
1.1896 + Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
1.1897 + change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST"
1.1898 + Changed some handling of unused parameters, to avoid compiler warnings.
1.1899 + "if (unused == NULL) return;" becomes "unused = unused".
1.1900 +
1.1901 +Version 1.2.19beta2 [May 18, 2007]
1.1902 + Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier)
1.1903 +
1.1904 +Version 1.2.19beta3 [May 19, 2007]
1.1905 + Add some "png_byte" typecasts in png_check_keyword() and write new_key
1.1906 + instead of key in zTXt chunk (Kevin Ryde).
1.1907 +
1.1908 +Version 1.2.19beta4 [May 21, 2007]
1.1909 + Add png_snprintf() function and use it in place of sprint() for improved
1.1910 + defense against buffer overflows.
1.1911 +
1.1912 +Version 1.2.19beta5 [May 21, 2007]
1.1913 + Fixed png_handle_tRNS() to only use the valid bits of tRNS value.
1.1914 + Changed handling of more unused parameters, to avoid compiler warnings.
1.1915 + Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.
1.1916 +
1.1917 +Version 1.2.19beta6 [May 22, 2007]
1.1918 + Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
1.1919 + Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
1.1920 +
1.1921 +Version 1.2.19beta7 [May 22, 2007]
1.1922 + Squelched png_squelch_warnings() in pnggccrd.c and added
1.1923 + an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
1.1924 + the warnings that png_squelch_warnings was squelching.
1.1925 +
1.1926 +Version 1.2.19beta8 [May 22, 2007]
1.1927 + Removed __MMX__ from test in pngconf.h.
1.1928 +
1.1929 +Version 1.2.19beta9 [May 23, 2007]
1.1930 + Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
1.1931 + Revised png_squelch_warnings() so it might work.
1.1932 + Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.
1.1933 +
1.1934 +Version 1.2.19beta10 [May 24, 2007]
1.1935 + Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.
1.1936 +
1.1937 +Version 1.4.0beta1 [April 20, 2006]
1.1938 + Enabled iTXt support (changes png_struct, thus requires so-number change).
1.1939 + Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED
1.1940 + Eliminated PNG_1_0_X and PNG_1_2_X macros.
1.1941 + Removed deprecated functions png_read_init, png_write_init, png_info_init,
1.1942 + png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and
1.1943 + removed the deprecated macro PNG_MAX_UINT.
1.1944 + Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h
1.1945 + Removed many WIN32_WCE #ifdefs (Cosmin).
1.1946 + Reduced dependency on C-runtime library when on Windows (Simon-Pierre)
1.1947 + Replaced sprintf() with png_sprintf() (Simon-Pierre)
1.1948 +
1.1949 +Version 1.4.0beta2 [April 20, 2006]
1.1950 + Revised makefiles and configure to avoid making links to libpng.so.*
1.1951 + Moved some leftover MMX-related defines from pngconf.h to pngintrn.h
1.1952 + Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def
1.1953 +
1.1954 +Version 1.4.0beta3 [May 10, 2006]
1.1955 + Updated scripts/pngw32.def to comment out MMX functions.
1.1956 + Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros.
1.1957 + Scripts/libpng.pc.in contained "configure" style version info and would
1.1958 + not work with makefiles.
1.1959 + Revised pngconf.h and added pngconf.h.in, so makefiles and configure can
1.1960 + pass defines to libpng and applications.
1.1961 +
1.1962 +Version 1.4.0beta4 [May 11, 2006]
1.1963 + Revised configure.ac, Makefile.am, and many of the makefiles to write
1.1964 + their defines in pngconf.h.
1.1965 +
1.1966 +Version 1.4.0beta5 [May 15, 2006]
1.1967 + Added a missing semicolon in Makefile.am and Makefile.in
1.1968 + Deleted extraneous square brackets from configure.ac
1.1969 +
1.1970 +Version 1.4.0beta6 [June 2, 2006]
1.1971 + Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1.1972 + buffer overflow.
1.1973 + Changed sonum from 0 to 1.
1.1974 + Removed unused prototype for png_check_sig() from png.h
1.1975 +
1.1976 +Version 1.4.0beta7 [June 16, 2006]
1.1977 + Exported png_write_sig (Cosmin).
1.1978 + Optimized buffer in png_handle_cHRM() (Cosmin).
1.1979 + Set pHYs = 2835 x 2835 pixels per meter, and added
1.1980 + sCAL = 0.352778e-3 x 0.352778e-3 meters, in pngtest.png (Cosmin).
1.1981 + Added png_set_benign_errors(), png_benign_error(), png_chunk_benign_error().
1.1982 + Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
1.1983 + Added "(unsigned long)" typecast on png_uint_32 variables in printf lists.
1.1984 +
1.1985 +Version 1.4.0beta8 [June 22, 2006]
1.1986 + Added demonstration of user chunk support in pngtest.c, to support the
1.1987 + public sTER chunk and a private vpAg chunk.
1.1988 +
1.1989 +Version 1.4.0beta9 [July 3, 2006]
1.1990 + Removed ordinals from scripts/pngw32.def and removed png_info_int and
1.1991 + png_set_gray_1_2_4_to_8 entries.
1.1992 + Inline call of png_get_uint_32() in png_get_uint_31().
1.1993 + Use png_get_uint_31() to get vpAg width and height in pngtest.c
1.1994 + Removed WINCE and Netware projects.
1.1995 + Removed standalone Y2KINFO file.
1.1996 +
1.1997 +Version 1.4.0beta10 [July 12, 2006]
1.1998 + Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and
1.1999 + some makefiles, because it was not working reliably. Instead, distribute
1.2000 + pngconf.h.in along with pngconf.h and cause configure and some of the
1.2001 + makefiles to update pngconf.h from pngconf.h.in.
1.2002 + Added pngconf.h to DEPENDENCIES in Makefile.am
1.2003 +
1.2004 +Version 1.4.0beta11 [August 19, 2006]
1.2005 + Removed AC_FUNC_MALLOC from configure.ac.
1.2006 + Added a warning when writing iCCP profile with mismatched profile length.
1.2007 + Patched pnggccrd.c to assemble on x86_64 platforms.
1.2008 + Moved chunk header reading into a separate function png_read_chunk_header()
1.2009 + in pngrutil.c. The chunk header (len+sig) is now serialized in a single
1.2010 + operation (Cosmin).
1.2011 + Implemented support for I/O states. Added png_ptr member io_state, and
1.2012 + functions png_get_io_chunk_name() and png_get_io_state() in pngget.c
1.2013 + (Cosmin).
1.2014 + Added png_get_io_chunk_name and png_get_io_state to scripts/*.def (Cosmin).
1.2015 + Renamed scripts/pngw32.* to scripts/pngwin.* (Cosmin).
1.2016 + Removed the include directories and libraries from CFLAGS and LDFLAGS
1.2017 + in scripts/makefile.gcc (Cosmin).
1.2018 + Used png_save_uint_32() to set vpAg width and height in pngtest.c (Cosmin).
1.2019 + Cast to proper type when getting/setting vpAg units in pngtest.c (Cosmin).
1.2020 + Added pngintrn.h to the Visual C++ projects (Cosmin).
1.2021 + Removed scripts/list (Cosmin).
1.2022 + Updated copyright year in scripts/pngwin.def (Cosmin).
1.2023 + Removed PNG_TYPECAST_NULL and used standard NULL consistently (Cosmin).
1.2024 + Disallowed the user to redefine png_size_t, and enforced a consistent use
1.2025 + of png_size_t across libpng (Cosmin).
1.2026 + Changed the type of png_ptr->rowbytes, PNG_ROWBYTES() and friends
1.2027 + to png_size_t (Cosmin).
1.2028 + Removed png_convert_size() and replaced png_sizeof with sizeof (Cosmin).
1.2029 + Removed some unnecessary type casts (Cosmin).
1.2030 + Changed prototype of png_get_compression_buffer_size() and
1.2031 + png_set_compression_buffer_size() to work with png_size_t instead of
1.2032 + png_uint_32 (Cosmin).
1.2033 + Removed png_memcpy_check() and png_memset_check() (Cosmin).
1.2034 + Fixed a typo (png_byte --> png_bytep) in libpng.3 and libpng.txt (Cosmin).
1.2035 + Clarified that png_zalloc() does not clear the allocated memory,
1.2036 + and png_zalloc() and png_zfree() cannot be PNGAPI (Cosmin).
1.2037 + Renamed png_mem_size_t to png_alloc_size_t, fixed its definition in
1.2038 + pngconf.h, and used it in all memory allocation functions (Cosmin).
1.2039 + Renamed pngintrn.h to pngpriv.h, added a comment at the top of the file
1.2040 + mentioning that the symbols declared in that file are private, and
1.2041 + updated the scripts and the Visual C++ projects accordingly (Cosmin).
1.2042 + Removed circular references between pngconf.h and pngconf.h.in in
1.2043 + scripts/makefile.vc*win32 (Cosmin).
1.2044 + Removing trailing '.' from the warning and error messages (Cosmin).
1.2045 + Added pngdefs.h that is built by makefile or configure, instead of
1.2046 + pngconf.h.in (Glenn).
1.2047 + Detect and fix attempt to write wrong iCCP profile length.
1.2048 +
1.2049 +Version 1.4.0beta12 [October 19, 2006]
1.2050 + Changed "logical" to "bitwise" in the documentation.
1.2051 + Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
1.2052 + Add a typecast to stifle compiler warning in pngrutil.c
1.2053 +
1.2054 +Version 1.4.0beta13 [November 10, 2006]
1.2055 + Fix potential buffer overflow in sPLT chunk handler.
1.2056 + Fix Makefile.am to not try to link to noexistent files.
1.2057 +
1.2058 +Version 1.4.0beta14 [November 15, 2006]
1.2059 + Check all exported functions for NULL png_ptr.
1.2060 +
1.2061 +Version 1.4.0beta15 [November 17, 2006]
1.2062 + Relocated two misplaced tests for NULL png_ptr.
1.2063 + Built Makefile.in with automake-1.9.6 instead of 1.9.2.
1.2064 + Build configure with autoconf-2.60 instead of 2.59
1.2065 + Add "install: all" in Makefile.am so "configure; make install" will work.
1.2066 +
1.2067 +Version 1.4.0beta16 [November 17, 2006]
1.2068 + Added a typecast in png_zalloc().
1.2069 +
1.2070 +Version 1.4.0beta17 [December 4, 2006]
1.2071 + Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c
1.2072 + Add "png_bytep" typecast to profile while calculating length in pngwutil.c
1.2073 +
1.2074 +Version 1.4.0beta18 [December 7, 2006]
1.2075 + Added scripts/CMakeLists.txt
1.2076 +
1.2077 +Version 1.4.0beta19 [May 16, 2007]
1.2078 + Revised scripts/CMakeLists.txt
1.2079 + Rebuilt configure and Makefile.in with newer tools.
1.2080 + Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
1.2081 + Added scripts/makefile.nommx
1.2082 +
1.2083 +Version 1.4.0beta20 [July 9, 2008]
1.2084 + Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications
1.2085 + calling set_unknown_chunk_location() need them.
1.2086 + Moved several macro definitions from pngpriv.h to pngconf.h
1.2087 + Merge with changes to the 1.2.X branch, as of 1.2.30beta04.
1.2088 + Deleted all use of the MMX assembler code and Intel-licensed optimizations.
1.2089 + Revised makefile.mingw
1.2090 +
1.2091 +Version 1.4.0beta21 [July 21, 2008]
1.2092 + Moved local array "chunkdata" from pngrutil.c to the png_struct, so
1.2093 + it will be freed by png_read_destroy() in case of a read error (Kurt
1.2094 + Christensen).
1.2095 +
1.2096 +Version 1.4.0beta22 [July 21, 2008]
1.2097 + Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking.
1.2098 +
1.2099 +Version 1.4.0beta23 [July 22, 2008]
1.2100 + Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in
1.2101 + png_decompress_chunk().
1.2102 +
1.2103 +Version 1.4.0beta24 [July 25, 2008]
1.2104 + Change all remaining "chunkdata" to "png_ptr->chunkdata" in
1.2105 + png_decompress_chunk(), and remove "chunkdata" from parameter list.
1.2106 + Put a call to png_check_chunk_name() in png_read_chunk_header().
1.2107 + Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte.
1.2108 + Removed two calls to png_check_chunk_name() occuring later in the process.
1.2109 + Define PNG_NO_ERROR_NUMBERS by default in pngconf.h
1.2110 +
1.2111 +Version 1.4.0beta25 [July 30, 2008]
1.2112 + Added a call to png_check_chunk_name() in pngpread.c
1.2113 + Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte.
1.2114 + Added png_push_have_buffer() function to pngpread.c
1.2115 + Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros.
1.2116 + Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS.
1.2117 + Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code.
1.2118 + Synced contrib directory and configure files with libpng-1.2.30beta06.
1.2119 + Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles)
1.2120 + Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c
1.2121 +
1.2122 +Version 1.4.0beta26 [August 4, 2008]
1.2123 + Removed png_push_have_buffer() function in pngpread.c. It increased the
1.2124 + compiled library size slightly.
1.2125 + Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta)
1.2126 + Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings.
1.2127 + Updated contrib/visupng/cexcept.h to version 2.0.1
1.2128 + Added PNG_LITERAL_CHARACTER macros for #, [, and ].
1.2129 +
1.2130 +Version 1.4.0beta27 [August 5, 2008]
1.2131 + Revised usage of PNG_LITERAL_SHARP in pngerror.c.
1.2132 + Moved newline character from individual png_debug messages into the
1.2133 + png_debug macros.
1.2134 + Allow user to #define their own png_debug, png_debug1, and png_debug2.
1.2135 +
1.2136 +Version 1.4.0beta28 [August 5, 2008]
1.2137 + Revised usage of PNG_LITERAL_SHARP in pngerror.c.
1.2138 + Added PNG_STRING_NEWLINE macro
1.2139 +
1.2140 +Version 1.4.0beta29 [August 9, 2008]
1.2141 + Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers.
1.2142 + Added PNG_STRING_COPYRIGHT macro.
1.2143 + Added non-ISO versions of png_debug macros.
1.2144 +
1.2145 +Version 1.4.0beta30 [August 14, 2008]
1.2146 + Added premultiplied alpha feature (Volker Wiendl).
1.2147 +
1.2148 +Version 1.4.0beta31 [August 18, 2008]
1.2149 + Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c
1.2150 + Removed extra crc check at the end of png_handle_cHRM(). Bug introduced
1.2151 + in libpng-1.4.0beta20.
1.2152 +
1.2153 +Version 1.4.0beta32 [August 19, 2008]
1.2154 + Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.
1.2155 + Revised PNG_NO_STDIO version of png_write_flush()
1.2156 +
1.2157 +Version 1.4.0beta33 [August 20, 2008]
1.2158 + Added png_get|set_chunk_cache_max() to limit the total number of sPLT,
1.2159 + text, and unknown chunks that can be stored.
1.2160 +
1.2161 +Version 1.4.0beta34 [September 6, 2008]
1.2162 + Shortened tIME_string to 29 bytes in pngtest.c
1.2163 + Fixed off-by-one error introduced in png_push_read_zTXt() function in
1.2164 + libpng-1.2.30beta04/pngpread.c (Harald van Dijk)
1.2165 +
1.2166 +Version 1.4.0beta35 [October 6, 2008]
1.2167 + Changed "trans_values" to "trans_color".
1.2168 + Changed so-number from 0 to 14. Some OS do not like 0.
1.2169 + Revised makefile.darwin to fix shared library numbering.
1.2170 + Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8()
1.2171 + in example.c (debian bug report)
1.2172 +
1.2173 +Version 1.4.0beta36 [October 25, 2008]
1.2174 + Sync with tEXt vulnerability fix in libpng-1.2.33rc02.
1.2175 +
1.2176 +Version 1.4.0beta37 [November 13, 2008]
1.2177 + Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c,
1.2178 + and pngwrite.c
1.2179 +
1.2180 +Version 1.4.0beta38 [November 22, 2008]
1.2181 + Added check for zero-area RGB cHRM triangle in png_check_cHRM() and
1.2182 + png_check_cHRM_fixed().
1.2183 +
1.2184 +Version 1.4.0beta39 [November 23, 2008]
1.2185 + Revised png_warning() to write its message on standard output by default
1.2186 + when warning_fn is NULL.
1.2187 +
1.2188 +Version 1.4.0beta40 [November 24, 2008]
1.2189 + Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed().
1.2190 + In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant
1.2191 + check for all-zero coordinates that is detected by the triangle check.
1.2192 +
1.2193 +Version 1.4.0beta41 [November 26, 2008]
1.2194 + Fixed string vs pointer-to-string error in png_check_keyword().
1.2195 + Rearranged test expressions in png_check_cHRM_fixed() to avoid internal
1.2196 + overflows.
1.2197 + Added PNG_NO_CHECK_cHRM conditional.
1.2198 +
1.2199 +Version 1.4.0beta42, 43 [December 1, 2008]
1.2200 + Merge png_debug with version 1.2.34beta04.
1.2201 +
1.2202 +Version 1.4.0beta44 [December 6, 2008]
1.2203 + Removed redundant check for key==NULL before calling png_check_keyword()
1.2204 + to ensure that new_key gets initialized and removed extra warning
1.2205 + (Merge with version 1.2.34beta05 -- Arvan Pritchard).
1.2206 +
1.2207 +Version 1.4.0beta45 [December 9, 2008]
1.2208 + In png_write_png(), respect the placement of the filler bytes in an earlier
1.2209 + call to png_set_filler() (Jim Barry).
1.2210 +
1.2211 +Version 1.4.0beta46 [December 10, 2008]
1.2212 + Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and
1.2213 + PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated
1.2214 + PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
1.2215 +
1.2216 +Version 1.4.0beta47 [December 15, 2008]
1.2217 + Support for dithering was disabled by default, because it has never
1.2218 + been well tested and doesn't work very well. The code has not
1.2219 + been removed, however, and can be enabled by building libpng with
1.2220 + PNG_READ_DITHER_SUPPORTED defined.
1.2221 +
1.2222 +Version 1.4.0beta48 [February 14, 2009]
1.2223 + Added new exported function png_calloc().
1.2224 + Combined several instances of png_malloc(); png_memset() into png_calloc().
1.2225 + Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
1.2226 + but was never defined.
1.2227 +
1.2228 +Version 1.4.0beta49 [February 28, 2009]
1.2229 + Added png_fileno() macro to pngconf.h, used in pngwio.c
1.2230 + Corrected order of #ifdef's in png_debug definition in png.h
1.2231 + Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments
1.2232 + for pcal_params.
1.2233 + Fixed order of #ifdef directives in the png_debug defines in png.h
1.2234 + (bug introduced in libpng-1.2.34/1.4.0beta29).
1.2235 + Revised comments in png_set_read_fn() and png_set_write_fn().
1.2236 +
1.2237 +Version 1.4.0beta50 [March 18, 2009]
1.2238 + Use png_calloc() instead of png_malloc() to allocate big_row_buf when
1.2239 + reading an interlaced file, to avoid a possible UMR.
1.2240 + Undid revision of PNG_NO_STDIO version of png_write_flush(). Users
1.2241 + having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined
1.2242 + or supply their own flush_fn() replacement.
1.2243 + Revised libpng*.txt and png.h documentation about use of png_write_flush()
1.2244 + and png_set_write_fn().
1.2245 + Removed fflush() from pngtest.c.
1.2246 + Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
1.2247 +
1.2248 +Version 1.4.0beta51 [March 21, 2009]
1.2249 + Removed new png_fileno() macro from pngconf.h .
1.2250 +
1.2251 +Version 1.4.0beta52 [March 27, 2009]
1.2252 + Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
1.2253 + This avoids building 16-bit gamma tables unnecessarily.
1.2254 + Removed fflush() from pngtest.c.
1.2255 + Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
1.2256 + Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt
1.2257 +
1.2258 +Version 1.4.0beta53 [April 1, 2009]
1.2259 + Removed some remaining MMX macros from pngpriv.h
1.2260 + Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)
1.2261 +
1.2262 +Version 1.4.0beta54 [April 13, 2009]
1.2263 + Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow
1.2264 + application code writers to bypass the check for multiple inclusion
1.2265 + of setjmp.h when they know that it is safe to ignore the situation.
1.2266 + Eliminated internal use of setjmp() in pngread.c and pngwrite.c
1.2267 + Reordered ancillary chunks in pngtest.png to be the same as what
1.2268 + pngtest now produces, and made some cosmetic changes to pngtest output.
1.2269 + Eliminated deprecated png_read_init_3() and png_write_init_3() functions.
1.2270 +
1.2271 +Version 1.4.0beta55 [April 15, 2009]
1.2272 + Simplified error handling in pngread.c and pngwrite.c by putting
1.2273 + the new png_read_cleanup() and png_write_cleanup() functions inline.
1.2274 +
1.2275 +Version 1.4.0beta56 [April 25, 2009]
1.2276 + Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress
1.2277 + "shadowed declaration" warning from gcc-4.3.3.
1.2278 + Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"
1.2279 + warning about a global "gamma" variable in math.h on some platforms.
1.2280 +
1.2281 +Version 1.4.0beta57 [May 2, 2009]
1.2282 + Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
1.2283 + but was never defined (again).
1.2284 + Rebuilt configure scripts with autoconf-2.63 instead of 2.62
1.2285 + Removed pngprefs.h and MMX from makefiles
1.2286 +
1.2287 +Version 1.4.0beta58 [May 14, 2009]
1.2288 + Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced
1.2289 + in beta57).
1.2290 + Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
1.2291 +
1.2292 +Version 1.4.0beta59 [May 15, 2009]
1.2293 + Reformated sources in libpng style (3-space intentation, comment format)
1.2294 + Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)
1.2295 + Added sections about the git repository and our coding style to the
1.2296 + documentation
1.2297 + Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.
1.2298 +
1.2299 +Version 1.4.0beta60 [May 19, 2009]
1.2300 + Conditionally compile png_read_finish_row() which is not used by
1.2301 + progressive readers.
1.2302 + Added contrib/pngminim/preader to demonstrate building minimal progressive
1.2303 + decoder, based on contrib/gregbook with embedded libpng and zlib.
1.2304 +
1.2305 +Version 1.4.0beta61 [May 20, 2009]
1.2306 + In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there
1.2307 + is only one makefile in those directories, and revised the README files
1.2308 + accordingly.
1.2309 + More reformatting of comments, mostly to capitalize sentences.
1.2310 +
1.2311 +Version 1.4.0beta62 [June 2, 2009]
1.2312 + Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
1.2313 + and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
1.2314 + Reformatted several remaining "else statement" into two lines.
1.2315 + Added a section to the libpng documentation about using png_get_io_ptr()
1.2316 + in configure scripts to detect the presence of libpng.
1.2317 +
1.2318 +Version 1.4.0beta63 [June 15, 2009]
1.2319 + Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
1.2320 + multiple times and to specify the sample order in the tRNS chunk,
1.2321 + because the ISO PNG specification has a typo in the tRNS table.
1.2322 + Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
1.2323 + PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
1.2324 + available for ignoring known chunks even when not saving unknown chunks.
1.2325 + Adopted preference for consistent use of "#ifdef" and "#ifndef" versus
1.2326 + "#if defined()" and "if !defined()" where possible.
1.2327 +
1.2328 +Version 1.4.0beta64 [June 24, 2009]
1.2329 + Eliminated PNG_LEGACY_SUPPORTED code.
1.2330 + Moved the various unknown chunk macro definitions outside of the
1.2331 + PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
1.2332 +
1.2333 +Version 1.4.0beta65 [June 26, 2009]
1.2334 + Added a reference to the libpng license in each file.
1.2335 +
1.2336 +Version 1.4.0beta66 [June 27, 2009]
1.2337 + Refer to the libpng license instead of the libpng license in each file.
1.2338 +
1.2339 +Version 1.4.0beta67 [July 6, 2009]
1.2340 + Relocated INVERT_ALPHA within png_read_png() and png_write_png().
1.2341 + Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.
1.2342 + Added an "xcode" project to the projects directory (Alam Arias).
1.2343 +
1.2344 +Version 1.4.0beta68 [July 19, 2009]
1.2345 + Avoid some tests in filter selection in pngwutil.c
1.2346 +
1.2347 +Version 1.4.0beta69 [July 25, 2009]
1.2348 + Simplified the new filter-selection test. This runs faster in the
1.2349 + common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases.
1.2350 + Removed extraneous declaration from the new call to png_read_gray_to_rgb()
1.2351 + (bug introduced in libpng-1.4.0beta67).
1.2352 + Fixed up xcode project (Alam Arias)
1.2353 + Added a prototype for png_64bit_product() in png.c
1.2354 +
1.2355 +Version 1.4.0beta70 [July 27, 2009]
1.2356 + Avoid a possible NULL dereference in debug build, in png_set_text_2().
1.2357 + (bug introduced in libpng-0.95, discovered by Evan Rouault)
1.2358 +
1.2359 +Version 1.4.0beta71 [July 29, 2009]
1.2360 + Rebuilt configure scripts with autoconf-2.64.
1.2361 +
1.2362 +Version 1.4.0beta72 [August 1, 2009]
1.2363 + Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec
1.2364 + from <http://tukaani.org/xz>.
1.2365 +
1.2366 +Version 1.4.0beta73 [August 1, 2009]
1.2367 + Reject attempt to write iCCP chunk with negative embedded profile length
1.2368 + (JD Chen) (CVE-2009-5063).
1.2369 +
1.2370 +Version 1.4.0beta74 [August 8, 2009]
1.2371 + Changed png_ptr and info_ptr member "trans" to "trans_alpha".
1.2372 +
1.2373 +Version 1.4.0beta75 [August 21, 2009]
1.2374 + Removed an extra png_debug() recently added to png_write_find_filter().
1.2375 + Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
1.2376 +
1.2377 +Version 1.4.0beta76 [August 22, 2009]
1.2378 + Moved an incorrectly located test in png_read_row() in pngread.c
1.2379 +
1.2380 +Version 1.4.0beta77 [August 27, 2009]
1.2381 + Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt,
1.2382 + and the "noconfig" files from the distribution.
1.2383 + Moved CMakeLists.txt from scripts into the main libpng directory.
1.2384 + Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
1.2385 +
1.2386 +Version 1.4.0beta78 [August 31, 2009]
1.2387 + Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
1.2388 + Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros.
1.2389 + Use png_malloc plus a loop instead of png_calloc() to initialize
1.2390 + row_pointers in png_read_png().
1.2391 +
1.2392 +Version 1.4.0beta79 [September 1, 2009]
1.2393 + Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays.
1.2394 + Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc().
1.2395 +
1.2396 +Version 1.4.0beta80 [September 17, 2009]
1.2397 + Removed scripts/libpng.icc
1.2398 + Changed typecast of filler from png_byte to png_uint_16 in png_set_filler().
1.2399 + (Dennis Gustafsson)
1.2400 + Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ")
1.2401 +
1.2402 +Version 1.4.0beta81 [September 23, 2009]
1.2403 + Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h
1.2404 + Expanded TAB characters in pngrtran.c
1.2405 + Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid
1.2406 + compiler complaints about doubly declaring things "const".
1.2407 + Changed all "#if [!]defined(X)" to "if[n]def X" where possible.
1.2408 + Eliminated unused png_ptr->row_buf_size
1.2409 +
1.2410 +Version 1.4.0beta82 [September 25, 2009]
1.2411 + Moved redundant IHDR checking into new png_check_IHDR() in png.c
1.2412 + and report all errors found in the IHDR data.
1.2413 + Eliminated useless call to png_check_cHRM() from pngset.c
1.2414 +
1.2415 +Version 1.4.0beta83 [September 25, 2009]
1.2416 + Revised png_check_IHDR() to eliminate bogus complaint about filter_type.
1.2417 +
1.2418 +Version 1.4.0beta84 [September 30, 2009]
1.2419 + Fixed some inconsistent indentation in pngconf.h
1.2420 + Revised png_check_IHDR() to add a test for width variable less than 32-bit.
1.2421 +
1.2422 +Version 1.4.0beta85 [October 1, 2009]
1.2423 + Revised png_check_IHDR() again, to check info_ptr members instead of
1.2424 + the contents of the returned parameters.
1.2425 +
1.2426 +Version 1.4.0beta86 [October 9, 2009]
1.2427 + Updated the "xcode" project (Alam Arias).
1.2428 + Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
1.2429 +
1.2430 +Version 1.4.0rc01 [October 19, 2009]
1.2431 + Trivial cosmetic changes.
1.2432 +
1.2433 +Version 1.4.0beta87 [October 30, 2009]
1.2434 + Moved version 1.4.0 back into beta.
1.2435 +
1.2436 +Version 1.4.0beta88 [October 30, 2009]
1.2437 + Revised libpng*.txt section about differences between 1.2.x and 1.4.0
1.2438 + because most of the new features have now been ported back to 1.2.41
1.2439 +
1.2440 +Version 1.4.0beta89 [November 1, 2009]
1.2441 + More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
1.2442 + Removed a harmless extra png_set_invert_alpha() from pngwrite.c
1.2443 + Apply png_user_chunk_cache_max within png_decompress_chunk().
1.2444 + Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.
1.2445 +
1.2446 +Version 1.4.0beta90 [November 2, 2009]
1.2447 + Removed all remaining WIN32_WCE #ifdefs except those involving the
1.2448 + time.h "tm" structure
1.2449 +
1.2450 +Version 1.4.0beta91 [November 3, 2009]
1.2451 + Updated scripts/pngw32.def and projects/wince/png32ce.def
1.2452 + Copied projects/wince/png32ce.def to the scripts directory.
1.2453 + Added scripts/makefile.wce
1.2454 + Patched ltmain.sh for wince support.
1.2455 + Added PNG_CONVERT_tIME_SUPPORTED macro.
1.2456 +
1.2457 +Version 1.4.0beta92 [November 4, 2009]
1.2458 + Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
1.2459 + Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED
1.2460 + Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead
1.2461 + of differences from 1.2.41 to 1.4.0)
1.2462 +
1.2463 +Version 1.4.0beta93 [November 7, 2009]
1.2464 + Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and
1.2465 + PNG_ALLOCATED macros to detect deprecated direct access to the
1.2466 + png_struct or info_struct members and other deprecated usage in
1.2467 + applications (John Bowler).
1.2468 + Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS,
1.2469 + to prevent warnings about direct access to png structs by libpng
1.2470 + functions while building libpng. They need to be tested, especially
1.2471 + those using compilers other than gcc.
1.2472 + Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG".
1.2473 + They should work but still need to be updated to remove
1.2474 + references to pnggccrd.c or pngvcrd.c and ASM building.
1.2475 + Added README.txt to the beos, cbuilder5, netware, and xcode projects warning
1.2476 + that they need to be updated, to remove references to pnggccrd.c and
1.2477 + pngvcrd.c and to depend on pngpriv.h
1.2478 + Removed three direct references to read_info_ptr members in pngtest.c
1.2479 + that were detected by the new PNG_DEPSTRUCT macro.
1.2480 + Moved the png_debug macro definitions and the png_read_destroy(),
1.2481 + png_write_destroy() and png_far_to_near() prototypes from png.h
1.2482 + to pngpriv.h (John Bowler)
1.2483 + Moved the synopsis lines for png_read_destroy(), png_write_destroy()
1.2484 + png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3.
1.2485 +
1.2486 +Version 1.4.0beta94 [November 9, 2009]
1.2487 + Removed the obsolete, unused pnggccrd.c and pngvcrd.c files.
1.2488 + Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
1.2489 + Removed dependency of pngtest.o on pngpriv.h in the makefiles.
1.2490 + Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
1.2491 +
1.2492 +Version 1.4.0beta95 [November 10, 2009]
1.2493 + Changed png_check_sig() to !png_sig_cmp() in contrib programs.
1.2494 + Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile
1.2495 + Changed png_check_sig() to !png_sig_cmp() in contrib programs.
1.2496 + Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
1.2497 + Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c
1.2498 + Added dependency on pngpriv.h in contrib/pngminim/*/makefile
1.2499 +
1.2500 +Version 1.4.0beta96 [November 12, 2009]
1.2501 + Renamed scripts/makefile.wce to scripts/makefile.cegcc
1.2502 + Revised Makefile.am to use libpng.sys while building libpng.so
1.2503 + so that only PNG_EXPORT functions are exported.
1.2504 + Removed the deprecated png_check_sig() function/macro.
1.2505 + Removed recently removed function names from scripts/*.def
1.2506 + Revised pngtest.png to put chunks in the same order written by pngtest
1.2507 + (evidently the same change made in libpng-1.0beta54 was lost).
1.2508 + Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
1.2509 +
1.2510 +Version 1.4.0beta97 [November 13, 2009]
1.2511 + Restored pngtest.png to the libpng-1.4.0beta7 version.
1.2512 + Removed projects/beos and netware.txt; no one seems to be supporting them.
1.2513 + Revised Makefile.in
1.2514 +
1.2515 +Version 1.4.0beta98 [November 13, 2009]
1.2516 + Added the "xcode" project to zip distributions,
1.2517 + Fixed a typo in scripts/pngwin.def introduced in beta97.
1.2518 +
1.2519 +Version 1.4.0beta99 [November 14, 2009]
1.2520 + Moved libpng-config.in and libpng.pc-configure.in out of the scripts
1.2521 + directory, to libpng-config.in and libpng-pc.in, respectively, and
1.2522 + modified Makefile.am and configure.ac accordingly. Now "configure"
1.2523 + needs nothing from the "scripts" directory.
1.2524 + Avoid redefining PNG_CONST in pngconf.h
1.2525 +
1.2526 +Version 1.4.0beta100 [November 14, 2009]
1.2527 + Removed ASM builds from projects/visualc6 and projects/visualc71
1.2528 + Removed scripts/makefile.nommx and makefile.vcawin32
1.2529 + Revised CMakeLists.txt to account for new location of libpng-config.in
1.2530 + and libpng-pc.in
1.2531 + Updated INSTALL to reflect removal and relocation of files.
1.2532 +
1.2533 +Version 1.4.0beta101 [November 14, 2009]
1.2534 + Restored the binary files (*.jpg, *.png, some project files) that were
1.2535 + accidentally deleted from the zip and 7z distributions when the xcode
1.2536 + project was added.
1.2537 +
1.2538 +Version 1.4.0beta102 [November 18, 2009]
1.2539 + Added libpng-config.in and libpng-pc.in to the zip and 7z distributions.
1.2540 + Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100.
1.2541 + Moved descriptions of makefiles and other scripts out of INSTALL into
1.2542 + scripts/README.txt
1.2543 + Updated the copyright year in scripts/pngwin.rc from 2006 to 2009.
1.2544 +
1.2545 +Version 1.4.0beta103 [November 21, 2009]
1.2546 + Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt
1.2547 + Align row_buf on 16-byte boundary in memory.
1.2548 + Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call
1.2549 + to png_flush() after png_write_IEND(). See 1.4.0beta32, 1.4.0beta50
1.2550 + changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES. Someone
1.2551 + needs this feature.
1.2552 + Make the 'png_jmpbuf' macro expand to a call that records the correct
1.2553 + longjmp function as well as returning a pointer to the setjmp
1.2554 + jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
1.2555 + (John Bowler)
1.2556 +
1.2557 +Version 1.4.0beta104 [November 22, 2009]
1.2558 + Removed png_longjmp_ptr from scripts/*.def and libpng.3
1.2559 + Rebuilt configure scripts with autoconf-2.65
1.2560 +
1.2561 +Version 1.4.0beta105 [November 25, 2009]
1.2562 + Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535()
1.2563 + to accomplish alpha premultiplication when
1.2564 + PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined.
1.2565 + Changed "/255" to "/255.0" in background calculations to make it clear
1.2566 + that the 255 is used as a double.
1.2567 +
1.2568 +Version 1.4.0beta106 [November 27, 2009]
1.2569 + Removed premultiplied alpha feature.
1.2570 +
1.2571 +Version 1.4.0beta107 [December 4, 2009]
1.2572 + Updated README
1.2573 + Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
1.2574 + Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
1.2575 + Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
1.2576 + to put png.h and pngconf.h in $prefix/include, like the other scripts,
1.2577 + instead of in $prefix/include/libpng. Also revised makefile.sco
1.2578 + to put them in $prefix/include/libpng15 instead of in
1.2579 + $prefix/include/libpng/libpng15.
1.2580 +
1.2581 +Version 1.4.0beta108 [December 11, 2009]
1.2582 + Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
1.2583 + Relocated png_do_chop() to its original position in pngrtran.c; the
1.2584 + change in version 1.2.41beta08 caused transparency to be handled wrong
1.2585 + in some 16-bit datastreams (Yusaku Sugai).
1.2586 +
1.2587 +Version 1.4.0beta109 [December 13, 2009]
1.2588 + Added "bit_depth" parameter to the private png_build_gamma_table() function.
1.2589 + Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the
1.2590 + PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit
1.2591 + tables.
1.2592 +
1.2593 +Version 1.4.0rc02 [December 20, 2009]
1.2594 + Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c
1.2595 +
1.2596 +Version 1.4.0rc03 [December 22, 2009]
1.2597 + Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
1.2598 + (revising the change in 1.4.0beta99)
1.2599 +
1.2600 +Version 1.4.0rc04 [December 25, 2009]
1.2601 + Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1.2602 + in pngset.c to be consistent with other changes in version 1.2.38.
1.2603 +
1.2604 +Version 1.4.0rc05 [December 25, 2009]
1.2605 + Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and
1.2606 + Makefile.in to be consistent with changes in libpng-1.4.0rc03
1.2607 +
1.2608 +Version 1.4.0rc06 [December 29, 2009]
1.2609 + Reverted the gamma_table changes from libpng-1.4.0beta109.
1.2610 + Fixed some indentation errors.
1.2611 +
1.2612 +Version 1.4.0rc07 [January 1, 2010]
1.2613 + Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences.
1.2614 + Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c
1.2615 + Update copyright year to 2010.
1.2616 +
1.2617 +Version 1.4.0rc08 [January 2, 2010]
1.2618 + Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr
1.2619 + in pngtest.c
1.2620 +
1.2621 +Version 1.4.0 [January 3, 2010]
1.2622 + No changes.
1.2623 +
1.2624 +Version 1.4.1beta01 [January 8, 2010]
1.2625 + Updated CMakeLists.txt for consistent indentation and to avoid an
1.2626 + unclosed if-statement warning (Philip Lowman).
1.2627 + Revised Makefile.am and Makefile.in to remove references to Y2KINFO,
1.2628 + KNOWNBUG, and libpng.la (Robert Schwebel).
1.2629 + Revised the makefiles to install the same files and symbolic
1.2630 + links as configure, except for libpng.la and libpng14.la.
1.2631 + Make png_set|get_compression_buffer_size() available even when
1.2632 + PNG_WRITE_SUPPORTED is not enabled.
1.2633 + Revised Makefile.am and Makefile.in to simplify their maintenance.
1.2634 + Revised scripts/makefile.linux to install a link to libpng14.so.14.1
1.2635 +
1.2636 +Version 1.4.1beta02 [January 9, 2010]
1.2637 + Revised the rest of the makefiles to install a link to libpng14.so.14.1
1.2638 +
1.2639 +Version 1.4.1beta03 [January 10, 2010]
1.2640 + Removed png_set_premultiply_alpha() from scripts/*.def
1.2641 +
1.2642 +Version 1.4.1rc01 [January 16, 2010]
1.2643 + No changes.
1.2644 +
1.2645 +Version 1.4.1beta04 [January 23, 2010]
1.2646 + Revised png_decompress_chunk() to improve speed and memory usage when
1.2647 + decoding large chunks.
1.2648 + Added png_set|get_chunk_malloc_max() functions.
1.2649 +
1.2650 +Version 1.4.1beta05 [January 26, 2010]
1.2651 + Relocated "int k" declaration in pngtest.c to minimize its scope.
1.2652 +
1.2653 +Version 1.4.1beta06 [January 28, 2010]
1.2654 + Revised png_decompress_chunk() to use a two-pass method suggested by
1.2655 + John Bowler.
1.2656 +
1.2657 +Version 1.4.1beta07 [February 6, 2010]
1.2658 + Folded some long lines in the source files.
1.2659 + Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,
1.2660 + and a PNG_USER_LIMITS_SUPPORTED flag.
1.2661 + Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as
1.2662 + png_ptr->png_user_chunk_malloc_max.
1.2663 + Revised png_push_save_buffer() to do fewer but larger png_malloc() calls.
1.2664 +
1.2665 +Version 1.4.1beta08 [February 6, 2010]
1.2666 + Minor cleanup and updating of dates and copyright year.
1.2667 +
1.2668 +Version 1.5.0beta01 [February 7, 2010]
1.2669 + Moved declaration of png_struct into private pngstruct.h and png_info
1.2670 + into pnginfo.h
1.2671 +
1.2672 +Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010]
1.2673 + Reverted to original png_push_save_buffer() code.
1.2674 +
1.2675 +Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010]
1.2676 + Return allocated "old_buffer" in png_push_save_buffer() before
1.2677 + calling png_error(), to avoid a potential memory leak.
1.2678 + Updated configure script to use SO number 15.
1.2679 +
1.2680 +Version 1.5.0beta04 [February 9, 2010]
1.2681 + Removed malformed "incomplete struct declaration" of png_info from png.h
1.2682 +
1.2683 +Version 1.5.0beta05 [February 12, 2010]
1.2684 + Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the
1.2685 + linewrapping that it entailed.
1.2686 + Revised comments in pngstruct.h and pnginfo.h and added pointers to
1.2687 + the libpng license.
1.2688 + Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES
1.2689 + Removed the cbuilder5 project, which has not been updated to 1.4.0.
1.2690 +
1.2691 +Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]
1.2692 + Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke
1.2693 + Nishikawa)
1.2694 +
1.2695 +Version 1.5.0beta07 [omitted]
1.2696 +
1.2697 +Version 1.5.0beta08 [February 19, 2010]
1.2698 + Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED
1.2699 + wherever png_snprintf() is used to construct error and warning messages.
1.2700 + Noted in scripts/makefile.mingw that it expects to be run under MSYS.
1.2701 + Removed obsolete unused MMX-querying support from contrib/gregbook
1.2702 + Added exported png_longjmp() function.
1.2703 + Removed the AIX redefinition of jmpbuf in png.h
1.2704 + Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt
1.2705 + when building on AIX.
1.2706 +
1.2707 +Version 1.5.0beta09 [February 19, 2010]
1.2708 + Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.
1.2709 + Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h
1.2710 +
1.2711 +Version 1.5.0beta10 [February 25, 2010]
1.2712 + Removed unused gzio.c from contrib/pngminim gather and makefile scripts
1.2713 + Removed replacement error handlers from contrib/gregbook. Because of
1.2714 + the new png_longjmp() function they are no longer needed.
1.2715 +
1.2716 +Version 1.5.0beta11 [March 6, 2010]
1.2717 + Removed checking for already-included setjmp.h from pngconf.h
1.2718 + Fixed inconsistent indentations and made numerous cosmetic changes.
1.2719 + Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
1.2720 +
1.2721 +Version 1.5.0beta12 [March 9, 2010]
1.2722 + Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from
1.2723 + the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES"
1.2724 + and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler).
1.2725 + Created new pngdebug.h and moved debug definitions there.
1.2726 +
1.2727 +Version 1.5.0beta13 [March 10, 2010]
1.2728 + Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
1.2729 + Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
1.2730 + PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
1.2731 + is defined.
1.2732 + Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
1.2733 + Moved the 'config.h' support from pngconf.h to pngpriv.h
1.2734 + Removed PNGAPI from the png_longjmp_ptr typedef.
1.2735 + Eliminated dependence of pngtest.c on the private pngdebug.h file.
1.2736 + Make all png_debug macros into *unterminated* statements or
1.2737 + expressions (i.e. a trailing ';' must always be added) and correct
1.2738 + the format statements in various png_debug messages.
1.2739 +
1.2740 +Version 1.5.0beta14 [March 14, 2010]
1.2741 + Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
1.2742 + Revised Makefile.am to account for recent additions and replacements.
1.2743 + Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and
1.2744 + added ordinal numbers to the Windows DEF file and corrected the duplicated
1.2745 + ordinal numbers on CE symbols that are commented out.
1.2746 + Added back in export symbols that can be present in the Windows build but
1.2747 + are disabled by default.
1.2748 + PNG_EXPORT changed to include an 'ordinal' field for DEF file generation.
1.2749 + PNG_CALLBACK added to make callback definitions uniform. PNGAPI split
1.2750 + into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks),
1.2751 + and appropriate changes made to all files. Cygwin builds re-hinged to
1.2752 + allow procedure call standard changes and to remove the need for the DEF
1.2753 + file (fixes build on Cygwin).
1.2754 + Enabled 'attribute' warnings that are relevant to library APIs and callbacks.
1.2755 + Changed rules for generation of the various symbol files and added a new
1.2756 + rule for a DEF file (which is also added to the distribution).
1.2757 + Updated the symbol file generation to stop it adding spurious spaces
1.2758 + to EOL (coming from preprocessor macro expansion). Added a facility
1.2759 + to join tokens in the output and rewrite *.dfn to use this.
1.2760 + Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71
1.2761 + and removed scripts/makefile.cygwin.
1.2762 + Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built.
1.2763 + Removed the include of sys/types.h - apparently unnecessary now on the
1.2764 + platforms on which it happened (all but Mac OS and RISC OS).
1.2765 + Moved the Mac OS test into pngpriv.h (the only place it is used.)
1.2766 +
1.2767 +Version 1.5.0beta15 [March 17, 2010]
1.2768 + Added symbols.chk target to Makefile.am to validate the symbols in png.h
1.2769 + against the new DEF file scripts/symbols.def.
1.2770 + Changed the default DEF file back to pngwin.def.
1.2771 + Removed makefile.mingw.
1.2772 + Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
1.2773 +
1.2774 +Version 1.5.0beta16 [April 1, 2010]
1.2775 + Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that
1.2776 + fields are initialized in all configurations. The READ/WRITE
1.2777 + macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as
1.2778 + before to disable code to actually read or write iTXt chunks
1.2779 + and iTXt_SUPPORTED can be used to detect presence of either
1.2780 + read or write support (but it is probably better to check for
1.2781 + the one actually required - read or write.)
1.2782 + Combined multiple png_warning() calls for a single error.
1.2783 + Restored the macro definition of png_check_sig().
1.2784 +
1.2785 +Version 1.5.0beta17 [April 17, 2010]
1.2786 + Added some "(long)" typecasts to printf calls in png_handle_cHRM().
1.2787 + Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
1.2788 + Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
1.2789 + more accurately what it actually does. At the same time, renamed
1.2790 + the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
1.2791 + PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
1.2792 + Added some "(long)" typecasts to printf calls in png_handle_cHRM().
1.2793 + Freeze build-time only configuration in the build.
1.2794 + In all prior versions of libpng most configuration options
1.2795 + controlled by compiler #defines had to be repeated by the
1.2796 + application code that used libpng. This patch changes this
1.2797 + so that compilation options that can only be changed at build
1.2798 + time are frozen in the build. Options that are compiler
1.2799 + dependent (and those that are system dependent) are evaluated
1.2800 + each time - pngconf.h holds these. Options that can be changed
1.2801 + per-file in the application are in png.h. Frozen options are
1.2802 + in the new installed header file pnglibconf.h (John Bowler)
1.2803 + Removed the xcode project because it has not been updated to work
1.2804 + with libpng-1.5.0.
1.2805 + Removed the ability to include optional pngusr.h
1.2806 +
1.2807 +Version 1.5.0beta18 [April 17, 2010]
1.2808 + Restored the ability to include optional pngusr.h
1.2809 + Moved replacements for png_error() and png_warning() from the
1.2810 + contrib/pngminim project to pngerror.c, for use when warnings or
1.2811 + errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
1.2812 + storing unneeded error/warning text.
1.2813 + Updated contrib/pngminim project to work with the new pnglibconf.h
1.2814 + Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
1.2815 +
1.2816 +Version 1.5.0beta19 [April 24, 2010]
1.2817 + Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions
1.2818 + to read and write ints to be disabled independently of PNG_USE_READ_MACROS,
1.2819 + which allows libpng to be built with the functions even though the default
1.2820 + is to use the macros - this allows applications to choose at app build
1.2821 + time whether or not to use macros (previously impossible because the
1.2822 + functions weren't in the default build.)
1.2823 + Changed Windows calling convention back to __cdecl for API functions.
1.2824 + For Windows/x86 platforms only:
1.2825 + __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses
1.2826 + __cdecl throughout (both API functions and callbacks) on Windows/x86
1.2827 + platforms.
1.2828 + Replaced visualc6 and visualc71 projects with new vstudio project
1.2829 + Relaxed the overly-restrictive permissions of some files.
1.2830 +
1.2831 +Version 1.5.0beta20 [April 24, 2010]
1.2832 + Relaxed more overly-restrictive permissions of some files.
1.2833 +
1.2834 +Version 1.5.0beta21 [April 27, 2010]
1.2835 + Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new
1.2836 + vstudio project files, and some trivial editing of some files in the
1.2837 + scripts directory.
1.2838 + Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in
1.2839 + contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
1.2840 +
1.2841 +Version 1.5.0beta22 [April 28, 2010]
1.2842 + Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS
1.2843 + because it has a macro equivalent.
1.2844 + Improved the options.awk script; added an "everything off" option.
1.2845 + Revised contrib/pngminim to use the "everything off" option in pngusr.dfa.
1.2846 +
1.2847 +Version 1.5.0beta23 [April 29, 2010]
1.2848 + Corrected PNG_REMOVED macro to take five arguments.
1.2849 + The macro was documented with two arguments (name,ordinal), however
1.2850 + the symbol checking .dfn files assumed five arguments. The five
1.2851 + argument form seems more useful so it is changed to that.
1.2852 + Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1.2853 + in gregbook/readpng2.c
1.2854 + Corrected protection of png_get_user_transform_ptr. The API declaration in
1.2855 + png.h is removed if both READ and WRITE USER_TRANSFORM are turned off
1.2856 + but was left defined in pngtrans.c
1.2857 + Added logunsupported=1 to cause pnglibconf.h to document disabled options.
1.2858 + This makes the installed pnglibconf.h more readable but causes no
1.2859 + other change. The intention is that users of libpng will find it
1.2860 + easier to understand if an API they need is missing.
1.2861 + Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
1.2862 + Removed dummy_inflate.c from contrib/pngminim/encoder
1.2863 + Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile.
1.2864 +
1.2865 +Version 1.5.0beta24 [May 7, 2010]
1.2866 + Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the
1.2867 + offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.
1.2868 + Added more blank lines for readability.
1.2869 +
1.2870 +Version 1.5.0beta25 [June 18, 2010]
1.2871 + In pngpread.c: png_push_have_row() add check for new_row > height
1.2872 + Removed the now-redundant check for out-of-bounds new_row from example.c
1.2873 +
1.2874 +Version 1.5.0beta26 [June 18, 2010]
1.2875 + In pngpread.c: png_push_process_row() add check for too many rows.
1.2876 +
1.2877 +Version 1.5.0beta27 [June 18, 2010]
1.2878 + Removed the check added in beta25 as it is now redundant.
1.2879 +
1.2880 +Version 1.5.0beta28 [June 20, 2010]
1.2881 + Rewrote png_process_IDAT_data to consistently treat extra data as warnings
1.2882 + and handle end conditions more cleanly.
1.2883 + Removed the new (beta26) check in png_push_process_row().
1.2884 +
1.2885 +Version 1.5.0beta29 [June 21, 2010]
1.2886 + Revised scripts/options.awk to work on Sunos (but still doesn't work)
1.2887 + Added comment to options.awk and contrib/pngminim/*/makefile to try nawk.
1.2888 +
1.2889 +Version 1.5.0beta30 [June 22, 2010]
1.2890 + Stop memory leak when reading a malformed sCAL chunk.
1.2891 +
1.2892 +Version 1.5.0beta31 [June 26, 2010]
1.2893 + Revised pngpread.c patch of beta28 to avoid an endless loop.
1.2894 + Removed some trailing blanks.
1.2895 +
1.2896 +Version 1.5.0beta32 [June 26, 2010]
1.2897 + Removed leftover scripts/options.patch and scripts/options.rej
1.2898 +
1.2899 +Version 1.5.0beta33 [July 6, 3010]
1.2900 + Made FIXED and FLOATING options consistent in the APIs they enable and
1.2901 + disable. Corrected scripts/options.awk to handle both command line
1.2902 + options and options specified in the .dfa files.
1.2903 + Changed char *msg to PNG_CONST char *msg in pngrutil.c
1.2904 + Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or
1.2905 + floating point APIs, but not both.
1.2906 + Reversed patch to remove error handler when the jmp_buf is stored in the
1.2907 + main program structure, not the png_struct.
1.2908 + The error handler is needed because the default handler in libpng will
1.2909 + always use the jmp_buf in the library control structure; this is never
1.2910 + set. The gregbook code is a useful example because, even though it
1.2911 + uses setjmp/longjmp, it shows how error handling can be implemented
1.2912 + using control mechanisms not directly supported by libpng. The
1.2913 + technique will work correctly with mechanisms such as Microsoft
1.2914 + Structure Exceptions or C++ exceptions (compiler willing - note that gcc
1.2915 + does not by default support interworking of C and C++ error handling.)
1.2916 + Reverted changes to call png_longjmp in contrib/gregbook where it is not
1.2917 + appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp
1.2918 + cannot be used.
1.2919 + Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)
1.2920 + Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')
1.2921 +
1.2922 +Version 1.5.0beta34 [July 12, 2010]
1.2923 + Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h
1.2924 +
1.2925 +Version 1.5.0beta35 [July 24, 2010]
1.2926 + Removed some newly-added TAB characters.
1.2927 + Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
1.2928 + Moved the definition of png_snprintf() outside of the enclosing
1.2929 + #ifdef blocks in pngconf.h
1.2930 +
1.2931 +Version 1.5.0beta36 [July 29, 2010]
1.2932 + Patches by John Bowler:
1.2933 + Fixed point APIs are now supported throughout (no missing APIs).
1.2934 + Internal fixed point arithmetic support exists for all internal floating
1.2935 + point operations.
1.2936 + sCAL validates the floating point strings it is passed.
1.2937 + Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2
1.2938 + Two new APIs exist to get the number of passes without turning on the
1.2939 + PNG_INTERLACE transform and to get the number of rows in the current
1.2940 + pass.
1.2941 + A new test program, pngvalid.c, validates the gamma code.
1.2942 + Errors in the 16-bit gamma correction (overflows) have been corrected.
1.2943 + cHRM chunk testing is done consistently (previously the floating point
1.2944 + API bypassed it, because the test really didn't work on FP, now the test
1.2945 + is performed on the actual values to be stored in the PNG file so it
1.2946 + works in the FP case too.)
1.2947 + Most floating point APIs now simply call the fixed point APIs after
1.2948 + converting the values to the fixed point form used in the PNG file.
1.2949 + The standard headers no longer include zlib.h, which is currently only
1.2950 + required for pngstruct.h and can therefore be internal.
1.2951 + Revised png_get_int_32 to undo the PNG two's complement representation of
1.2952 + negative numbers.
1.2953 +
1.2954 +Version 1.5.0beta37 [July 30, 2010]
1.2955 + Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid
1.2956 + a compiler warning.
1.2957 + Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
1.2958 +
1.2959 +Version 1.5.0beta38 [July 31, 2010]
1.2960 + Implemented remaining "_fixed" functions.
1.2961 + Corrected a number of recently introduced warnings mostly resulting from
1.2962 + safe but uncast assignments to shorter integers. Also added a zlib
1.2963 + VStudio release library project because the latest zlib Official Windows
1.2964 + build does not include such a thing.
1.2965 + Revised png_get_int_16() to be similar to png_get_int_32().
1.2966 + Restored projects/visualc71.
1.2967 +
1.2968 +Version 1.5.0beta39 [August 2, 2010]
1.2969 + VisualC/GCC warning fixes, VisualC build fixes
1.2970 + The changes include support for function attributes in VC in addition to
1.2971 + those already present in GCC - necessary because without these some
1.2972 + warnings are unavoidable. Fixes include signed/unsigned fixes in
1.2973 + pngvalid and checks with gcc -Wall -Wextra -Wunused.
1.2974 + VC requires function attributes on function definitions as well as
1.2975 + declarations, PNG_FUNCTION has been added to enable this and the
1.2976 + relevant function definitions changed.
1.2977 +
1.2978 +Version 1.5.0beta40 [August 6, 2010]
1.2979 + Correct use of _WINDOWS_ in pngconf.h
1.2980 + Removed png_mem_ #defines; they are no longer used.
1.2981 + Added the sRGB chunk to pngtest.png
1.2982 +
1.2983 +Version 1.5.0beta41 [August 11, 2010]
1.2984 + Added the cHRM chunk to pngtest.png
1.2985 + Don't try to use version-script with cygwin/mingw.
1.2986 + Revised contrib/gregbook to work under cygwin/mingw.
1.2987 +
1.2988 +Version 1.5.0beta42 [August 18, 2010]
1.2989 + Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
1.2990 + Made all API functions that have const arguments and constant string
1.2991 + literal pointers declare them (John Bowler).
1.2992 +
1.2993 +Version 1.5.0beta43 [August 20, 2010]
1.2994 + Removed spurious tabs, shorten long lines (no source change)
1.2995 + Also added scripts/chkfmt to validate the format of all the files that can
1.2996 + reasonably be validated (it is suggested to run "make distclean" before
1.2997 + checking, because some machine generated files have long lines.)
1.2998 + Reformatted the CHANGES file to be more consistent throughout.
1.2999 + Made changes to address various issues identified by GCC, mostly
1.3000 + signed/unsigned and shortening problems on assignment but also a few
1.3001 + difficult to optimize (for GCC) loops.
1.3002 + Fixed non-GCC fixed point builds. In png.c a declaration was misplaced
1.3003 + in an earlier update. Fixed to declare the auto variables at the head.
1.3004 + Use cexcept.h in pngvalid.c.
1.3005 +
1.3006 +Version 1.5.0beta44 [August 24, 2010]
1.3007 + Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
1.3008 + installing libpng in /usr/lib64 (Funda Wang).
1.3009 + Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
1.3010 + Revised CMakeLists.txt to make symlinks instead of copies when installing.
1.3011 + Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)
1.3012 + Implemented memory checks within pngvalid
1.3013 + Reformatted/rearranged pngvalid.c to assist use of progressive reader.
1.3014 + Check interlaced images in pngvalid
1.3015 + Clarified pngusr.h comments in pnglibconf.dfa
1.3016 + Simplified the pngvalid error-handling code now that cexcept.h is in place.
1.3017 + Implemented progressive reader in pngvalid.c for standard tests
1.3018 + Implemented progressive read in pngvalid.c gamma tests
1.3019 + Turn on progressive reader in pngvalid.c by default and tidy code.
1.3020 +
1.3021 +Version 1.5.0beta45 [August 26, 2010]
1.3022 + Added an explicit make step to projects/vstudio for pnglibconf.h
1.3023 + Also corrected zlib.vcxproj into which Visual Studio had introduced
1.3024 + what it calls an "authoring error". The change to make pnglibconf.h
1.3025 + simply copies the file; in the future it may actually generate the
1.3026 + file from scripts/pnglibconf.dfa as the other build systems do.
1.3027 + Changed pngvalid to work when floating point APIs are disabled
1.3028 + Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt
1.3029 + Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX
1.3030 + in pngpriv.h in case the user neglected to define them in their pngusr.h
1.3031 +
1.3032 +Version 1.5.0beta46 [August 28, 2010]
1.3033 + Added new private header files to libpng_sources in CMakeLists.txt
1.3034 + Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options.
1.3035 + Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project.
1.3036 +
1.3037 +Version 1.5.0beta47 [September 11, 2010]
1.3038 + Fixed a number of problems with 64-bit compilation reported by Visual
1.3039 + Studio 2010 (John Bowler).
1.3040 +
1.3041 +Version 1.5.0beta48 [October 4, 2010]
1.3042 + Updated CMakeLists.txt (Philip Lowman).
1.3043 + Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
1.3044 + $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
1.3045 + Fixed problem with symbols creation in Makefile.am which was assuming that
1.3046 + all versions of ccp write to standard output by default (Martin Banky). The
1.3047 + bug was introduced in libpng-1.2.9beta5.
1.3048 + Removed unused mkinstalldirs.
1.3049 +
1.3050 +Version 1.5.0beta49 [October 8, 2010]
1.3051 + Undid Makefile.am revision of 1.5.0beta48.
1.3052 +
1.3053 +Version 1.5.0beta50 [October 14, 2010]
1.3054 + Revised Makefile.in to account for mkinstalldirs being removed.
1.3055 + Added some "(unsigned long)" typecasts in printf statements in pngvalid.c.
1.3056 + Suppressed a compiler warning in png_handle_sPLT().
1.3057 + Check for out-of-range text compression mode in png_set_text().
1.3058 +
1.3059 +Version 1.5.0beta51 [October 15, 2010]
1.3060 + Changed embedded dates to "(PENDING RELEASE) in beta releases (and future
1.3061 + rc releases) to minimize the difference between releases.
1.3062 +
1.3063 +Version 1.5.0beta52 [October 16, 2010]
1.3064 + Restored some of the embedded dates (in png.h, png.c, documentation, etc.)
1.3065 +
1.3066 +Version 1.5.0beta53 [October 18, 2010]
1.3067 + Updated INSTALL to mention using "make maintainer-clean" and to remove
1.3068 + obsolete statement about a custom ltmain.sh
1.3069 + Disabled "color-tests" by default in Makefile.am so it will work with
1.3070 + automake versions earlier than 1.11.1
1.3071 + Use document name "libpng-manual.txt" instead of "libpng-<version>.txt"
1.3072 + to simplify version differences.
1.3073 + Removed obsolete remarks about setjmp handling from INSTALL.
1.3074 + Revised and renamed the typedef in png.h and png.c that was designed
1.3075 + to catch library and header mismatch.
1.3076 +
1.3077 +Version 1.5.0beta54 [November 10, 2010]
1.3078 + Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.
1.3079 + Used a consistent structure for the pngget.c functions.
1.3080 +
1.3081 +Version 1.5.0beta55 [November 21, 2010]
1.3082 + Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
1.3083 + Moved reading of file signature into png_read_sig (Cosmin)
1.3084 + Fixed atomicity of chunk header serialization (Cosmin)
1.3085 + Added test for io_state in pngtest.c (Cosmin)
1.3086 + Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.
1.3087 + Changes to remove gcc warnings (John Bowler)
1.3088 + Certain optional gcc warning flags resulted in warnings in libpng code.
1.3089 + With these changes only -Wconversion and -Wcast-qual cannot be turned on.
1.3090 + Changes are trivial rearrangements of code. -Wconversion is not possible
1.3091 + for pngrutil.c (because of the widespread use of += et al on variables
1.3092 + smaller than (int) or (unsigned int)) and -Wcast-qual is not possible
1.3093 + with pngwio.c and pngwutil.c because the 'write' callback and zlib
1.3094 + compression both fail to declare their input buffers with 'const'.
1.3095 +
1.3096 +Version 1.5.0beta56 [December 7, 2010]
1.3097 + Added the private PNG_UNUSED() macro definition in pngpriv.h.
1.3098 + Added some commentary about PNG_EXPORT in png.h and pngconf.h
1.3099 + Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the
1.3100 + objective of simplifying and improving the cosmetic appearance of png.h.
1.3101 + Fixed some incorrect "=" macro names in pnglibconf.dfa
1.3102 + Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt
1.3103 +
1.3104 +Version 1.5.0beta57 [December 9, 2010]
1.3105 + Documented the pngvalid gamma error summary with additional comments and
1.3106 + print statements.
1.3107 + Improved missing symbol handling in checksym.awk; symbols missing in both
1.3108 + the old and new files can now be optionally ignored, treated as errors
1.3109 + or warnings.
1.3110 + Removed references to pngvcrd.c and pnggccrd.c from the vstudio project.
1.3111 + Updated "libpng14" to "libpng15" in the visualc71 project.
1.3112 + Enabled the strip16 tests in pngvalid.`
1.3113 + Don't display test results (except PASS/FAIL) when running "make test".
1.3114 + Instead put them in pngtest-log.txt
1.3115 + Added "--with-zprefix=<string>" to configure.ac
1.3116 + Updated the prebuilt configuration files to autoconf version 2.68
1.3117 +
1.3118 +Version 1.5.0beta58 [December 19, 2010]
1.3119 + Fixed interlace image handling and add test cases (John Bowler)
1.3120 + Fixed the clean rule in Makefile.am to remove pngtest-log.txt
1.3121 + Made minor changes to work around warnings in gcc 3.4
1.3122 +
1.3123 +Version 1.5.0rc01 [December 27, 2010]
1.3124 + No changes.
1.3125 +
1.3126 +Version 1.5.0rc02 [December 27, 2010]
1.3127 + Eliminated references to the scripts/*.def files in project/visualc71.
1.3128 +
1.3129 +Version 1.5.0rc03 [December 28, 2010]
1.3130 + Eliminated scripts/*.def and revised Makefile.am accordingly
1.3131 +
1.3132 +Version 1.5.0rc04 [December 29, 2010]
1.3133 + Fixed bug in background transformation handling in pngrtran.c (it was
1.3134 + looking for the flag in png_ptr->transformations instead of in
1.3135 + png_ptr->flags) (David Raymond).
1.3136 +
1.3137 +Version 1.5.0rc05 [December 31, 2010]
1.3138 + Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin)
1.3139 +
1.3140 +Version 1.5.0rc06 [January 4, 2011]
1.3141 + Changed the new configure option "zprefix=string" to "zlib-prefix=string"
1.3142 +
1.3143 +Version 1.5.0rc07 [January 4, 2011]
1.3144 + Updated copyright year.
1.3145 +
1.3146 +Version 1.5.0 [January 6, 2011]
1.3147 + No changes.
1.3148 +
1.3149 +version 1.5.1beta01 [January 8, 2011]
1.3150 + Added description of png_set_crc_action() to the manual.
1.3151 + Added a note in the manual that the type of the iCCP profile was changed
1.3152 + from png_charpp to png_bytepp in png_get_iCCP(). This change happened
1.3153 + in version 1.5.0beta36 but is not noted in the CHANGES. Similarly,
1.3154 + it was changed from png_charpp to png_const_bytepp in png_set_iCCP().
1.3155 + Ensure that png_rgb_to_gray ignores palette mapped images, if libpng
1.3156 + internally happens to call it with one, and fixed a failure to handle
1.3157 + palette mapped images correctly. This fixes CVE-2690.
1.3158 +
1.3159 +Version 1.5.1beta02 [January 14, 2011]
1.3160 + Fixed a bug in handling of interlaced images (bero at arklinux.org).
1.3161 + Updated CMakeLists.txt (Clifford Yapp)
1.3162 +
1.3163 +Version 1.5.1beta03 [January 14, 2011]
1.3164 + Fixed typecasting of some png_debug() statements (Cosmin)
1.3165 +
1.3166 +Version 1.5.1beta04 [January 16, 2011]
1.3167 + Updated documentation of png_set|get_tRNS() (Thomas Klausner).
1.3168 + Mentioned in the documentation that applications must #include "zlib.h"
1.3169 + if they need access to anything in zlib.h, and that a number of
1.3170 + macros such as png_memset() are no longer accessible by applications.
1.3171 + Corrected pngvalid gamma test "sample" function to access all of the color
1.3172 + samples of each pixel, instead of sampling the red channel three times.
1.3173 + Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow"
1.3174 + warnings, and (mistakenly) changed png_exp() to exp().
1.3175 +
1.3176 +Version 1.5.1beta05 [January 16, 2011]
1.3177 + Changed variable names png_index, png_div, png_exp, and png_gamma to
1.3178 + char_index, divisor, exp_b10, and gamma_val, respectively, and
1.3179 + changed exp() back to png_exp().
1.3180 +
1.3181 +Version 1.5.1beta06 [January 20, 2011]
1.3182 + Prevent png_push_crc_skip() from hanging while reading an unknown chunk
1.3183 + or an over-large compressed zTXt chunk with the progressive reader.
1.3184 + Eliminated more GCC "shadow" warnings.
1.3185 + Revised png_fixed() in png.c to avoid compiler warning about reaching the
1.3186 + end without returning anything.
1.3187 +
1.3188 +Version 1.5.1beta07 [January 22, 2011]
1.3189 + In the manual, describe the png_get_IHDR() arguments in the correct order.
1.3190 + Added const_png_structp and const_png_infop types, and used them in
1.3191 + prototypes for most png_get_*() functions.
1.3192 +
1.3193 +Version 1.5.1beta08 [January 23, 2011]
1.3194 + Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name()
1.3195 + Added synopses for the IO_STATE functions and other missing synopses
1.3196 + to the manual. Removed the synopses from libpngpf.3 because they
1.3197 + were out of date and no longer useful. Better information can be
1.3198 + obtained by reading the prototypes and comments in pngpriv.h
1.3199 + Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build
1.3200 + Added a make macro DFNCPP that is a CPP that will accept the tokens in
1.3201 + a .dfn file and adds configure stuff to test for such a CPP. ./configure
1.3202 + should fail if one is not available.
1.3203 + Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace.
1.3204 + Added png_get_current_row_number and png_get_current_pass_number for the
1.3205 + benefit of the user transform callback.
1.3206 + Added png_process_data_pause and png_process_data_skip for the benefit of
1.3207 + progressive readers that need to stop data processing or want to optimize
1.3208 + skipping of unread data (e.g., if the reader marks a chunk to be skipped.)
1.3209 +
1.3210 +Version 1.5.1beta09 [January 24, 2011]
1.3211 + Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error.
1.3212 + pngvalid contains tests of transforms, which tests are currently disabled
1.3213 + because they are incompletely tested. gray_to_rgb was failing to expand
1.3214 + the bit depth for smaller bit depth images; this seems to be a long
1.3215 + standing error and resulted, apparently, in invalid output
1.3216 + (CVE-2011-0408, CERT VU#643140). The documentation did not accurately
1.3217 + describe what libpng really does when converting RGB to gray.
1.3218 +
1.3219 +Version 1.5.1beta10 [January 27, 2010]
1.3220 + Fixed incorrect examples of callback prototypes in the manual, that were
1.3221 + introduced in libpng-1.0.0.
1.3222 + In addition the order of the png_get_uint macros with respect to the
1.3223 + relevant function definitions has been reversed. This helps the
1.3224 + preprocessing of the symbol files be more robust. Furthermore, the
1.3225 + symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when
1.3226 + the library may actually be built with PNG_USE_READ_MACROS; this stops
1.3227 + the read macros interfering with the symbol file format.
1.3228 + Made the manual, synopses, and function prototypes use the function
1.3229 + argument names file_gamma, int_file_gamma, and srgb_intent consistently.
1.3230 +
1.3231 +Version 1.5.1beta11 [January 28, 2011]
1.3232 + Changed PNG_UNUSED from "param=param;" to "{if(param){}}".
1.3233 + Corrected local variable type in new API png_process_data_skip()
1.3234 + The type was self-evidently incorrect but only causes problems on 64-bit
1.3235 + architectures.
1.3236 + Added transform tests to pngvalid and simplified the arguments.
1.3237 +
1.3238 +Version 1.5.1rc01 [January 29, 2011]
1.3239 + No changes.
1.3240 +
1.3241 +Version 1.5.1rc02 [January 31, 2011]
1.3242 + Added a request in the manual that applications do not use "png_" or
1.3243 + "PNG_" to begin any of their own symbols.
1.3244 + Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h
1.3245 +
1.3246 +Version 1.5.1 [February 3, 2011]
1.3247 + No changes.
1.3248 +
1.3249 +Version 1.5.2beta01 [February 13, 2011]
1.3250 + More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
1.3251 + check formal parameters names in function declarations (as well as
1.3252 + definitions) to see if they match a name in the global namespace.
1.3253 + Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
1.3254 + old VisualC++ preprocessor.
1.3255 + Turned on interlace handling in png_read_png().
1.3256 + Fixed gcc pendantic warnings.
1.3257 + Handle longjmp in Cygwin.
1.3258 + Fixed png_get_current_row_number() in the interlaced case.
1.3259 + Cleaned up ALPHA flags and transformations.
1.3260 + Implemented expansion to 16 bits.
1.3261 +
1.3262 +Version 1.5.2beta02 [February 19, 2011]
1.3263 + Fixed mistake in the descriptions of user read_transform and write_transform
1.3264 + function prototypes in the manual. The row_info struct is png_row_infop.
1.3265 + Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior.
1.3266 + Corrected png_get_current_row_number documentation
1.3267 + Fixed the read/write row callback documentation.
1.3268 + This documents the current behavior, where the callback is called after
1.3269 + every row with information pertaining to the next row.
1.3270 +
1.3271 +Version 1.5.2beta03 [March 3, 2011]
1.3272 + Fixed scripts/makefile.vcwin32
1.3273 + Updated contrib/pngsuite/README to add the word "modify".
1.3274 + Define PNG_ALLOCATED to blank when _MSC_VER<1300.
1.3275 +
1.3276 +Version 1.5.2rc01 [March 19, 2011]
1.3277 + Define remaining attributes to blank when MSC_VER<1300.
1.3278 + ifdef out mask arrays in pngread.c when interlacing is not supported.
1.3279 +
1.3280 +Version 1.5.2rc02 [March 22, 2011]
1.3281 + Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
1.3282 + and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
1.3283 + from the makefiles.
1.3284 + Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
1.3285 + to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
1.3286 +
1.3287 +Version 1.5.2rc03 [March 24, 2011]
1.3288 + Don't include standard header files in png.h while building the symbol table,
1.3289 + to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
1.3290 +
1.3291 +Version 1.5.2 [March 31, 2011]
1.3292 + No changes.
1.3293 +
1.3294 +Version 1.5.3beta01 [April 1, 2011]
1.3295 + Re-initialize the zlib compressor before compressing non-IDAT chunks.
1.3296 + Added API functions (png_set_text_compression_level() and four others) to
1.3297 + set parameters for zlib compression of non-IDAT chunks.
1.3298 +
1.3299 +Version 1.5.3beta02 [April 3, 2011]
1.3300 + Updated scripts/symbols.def with new API functions.
1.3301 + Only compile the new zlib re-initializing code when text or iCCP is
1.3302 + supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro.
1.3303 + Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03).
1.3304 + Optimize the zlib CMF byte in non-IDAT compressed chunks
1.3305 +
1.3306 +Version 1.5.3beta03 [April 16, 2011]
1.3307 + Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have
1.3308 + snprintf, and the "__STRICT_ANSI__" detects that condition more reliably
1.3309 + than __STDC__ (John Bowler).
1.3310 + Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells
1.3311 + the compiler that a user supplied callback (the error handler) does not
1.3312 + return, yet there is no guarantee in practice that the application code
1.3313 + will correctly implement the error handler because the compiler only
1.3314 + issues a warning if there is a mistake (John Bowler).
1.3315 + Removed the no-longer-used PNG_DEPSTRUCT macro.
1.3316 + Updated the zlib version to 1.2.5 in the VStudio project.
1.3317 + Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in
1.3318 + pngwutil.c (John Bowler).
1.3319 + Fixed bug with stripping the filler or alpha channel when writing, that
1.3320 + was introduced in libpng-1.5.2beta01 (bug report by Andrew Church).
1.3321 +
1.3322 +Version 1.5.3beta04 [April 27, 2011]
1.3323 + Updated pngtest.png with the new zlib CMF optimization.
1.3324 + Cleaned up conditional compilation code and of background/gamma handling
1.3325 + Internal changes only except a new option to avoid compiling the
1.3326 + png_build_grayscale_palette API (which is not used at all internally.)
1.3327 + The main change is to move the transform tests (READ_TRANSFORMS,
1.3328 + WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids
1.3329 + calls to spurious functions if all transforms are disabled and slightly
1.3330 + simplifies those functions. Pngvalid modified to handle this.
1.3331 + A minor change is to stop the strip_16 and expand_16 interfaces from
1.3332 + disabling each other; this allows the future alpha premultiplication
1.3333 + code to use 16-bit intermediate values while still producing 8-bit output.
1.3334 + png_do_background and png_do_gamma have been simplified to take a single
1.3335 + pointer to the png_struct rather than pointers to every item required
1.3336 + from the png_struct. This makes no practical difference to the internal
1.3337 + code.
1.3338 + A serious bug in the pngvalid internal routine 'standard_display_init' has
1.3339 + been fixed - this failed to initialize the red channel and accidentally
1.3340 + initialized the alpha channel twice.
1.3341 + Changed png_struct jmp_buf member name from png_jmpbuf to tmp_jmpbuf to
1.3342 + avoid a possible clash with the png_jmpbuf macro on some platforms.
1.3343 +
1.3344 +Version 1.5.3beta05 [May 6, 2011]
1.3345 + Added the "_POSIX_SOURCE" feature test macro to ensure libpng sees the
1.3346 + correct API. _POSIX_SOURCE is defined in pngpriv.h, pngtest.c and
1.3347 + pngvalid.c to ensure that POSIX conformant systems disable non-POSIX APIs.
1.3348 + Removed png_snprintf and added formatted warning messages. This change adds
1.3349 + internal APIs to allow png_warning messages to have parameters without
1.3350 + requiring the host OS to implement snprintf. As a side effect the
1.3351 + dependency of the tIME-supporting RFC1132 code on stdio is removed and
1.3352 + PNG_NO_WARNINGS does actually work now.
1.3353 + Pass "" instead of '\0' to png_default_error() in png_err(). This mistake
1.3354 + was introduced in libpng-1.2.20beta01. This fixes CVE-2011-2691.
1.3355 + Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte
1.3356 + optimization configureable.
1.3357 + IDAT compression failed if preceded by a compressed text chunk (bug
1.3358 + introduced in libpng-1.5.3beta01-02). This was because the attempt to
1.3359 + reset the zlib stream in png_write_IDAT happened after the first IDAT
1.3360 + chunk had been deflated - much too late. In this change internal
1.3361 + functions were added to claim/release the z_stream and, hopefully, make
1.3362 + the code more robust. Also deflateEnd checking is added - previously
1.3363 + libpng would ignore an error at the end of the stream.
1.3364 +
1.3365 +Version 1.5.3beta06 [May 8, 2011]
1.3366 + Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt
1.3367 + Implemented premultiplied alpha support: png_set_alpha_mode API
1.3368 +
1.3369 +Version 1.5.3beta07 [May 11, 2011]
1.3370 + Added expand_16 support to the high level interface.
1.3371 + Added named value and 'flag' gamma support to png_set_gamma. Made a minor
1.3372 + change from the previous (unreleased) ABI/API to hide the exact value used
1.3373 + for Macs - it's not a good idea to embed this in the ABI!
1.3374 + Moved macro definitions for PNG_HAVE_IHDR, PNG_HAVE_PLTE, and PNG_AFTER_IDAT
1.3375 + from pngpriv.h to png.h because they must be visible to applications
1.3376 + that call png_set_unknown_chunks().
1.3377 + Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
1.3378 + before IDAT.
1.3379 +
1.3380 +Version 1.5.3beta08 [May 16, 2011]
1.3381 + Improved "pngvalid --speed" to exclude more of pngvalid from the time.
1.3382 + Documented png_set_alpha_mode(), other changes in libpng.3/libpng-manual.txt
1.3383 + The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative
1.3384 + parameters are supplied by the caller), while in the absence of cHRM
1.3385 + sRGB/Rec 709 values are still used. This introduced a divide-by-zero
1.3386 + bug in png_handle_cHRM().
1.3387 + The bKGD chunk no longer overwrites the background value set by
1.3388 + png_set_background(), allowing the latter to be used before the file
1.3389 + header is read. It never performed any useful function to override
1.3390 + the default anyway.
1.3391 + Added memory overwrite and palette image checks to pngvalid.c
1.3392 + Previously palette image code was poorly checked. Since the transformation
1.3393 + code has a special palette path in most cases this was a severe weakness.
1.3394 + Minor cleanup and some extra checking in pngrutil.c and pngrtran.c. When
1.3395 + expanding an indexed image, always expand to RGBA if transparency is
1.3396 + present.
1.3397 +
1.3398 +Version 1.5.3beta09 [May 17, 2011]
1.3399 + Reversed earlier 1.5.3 change of transformation order; move png_expand_16
1.3400 + back where it was. The change doesn't work because it requires 16-bit
1.3401 + gamma tables when the code only generates 8-bit ones. This fails
1.3402 + silently; the libpng code just doesn't do any gamma correction. Moving
1.3403 + the tests back leaves the old, inaccurate, 8-bit gamma calculations, but
1.3404 + these are clearly better than none!
1.3405 +
1.3406 +Version 1.5.3beta10 [May 20, 2011]
1.3407 +
1.3408 + png_set_background() and png_expand_16() did not work together correctly.
1.3409 + This problem is present in 1.5.2; if png_set_background is called with
1.3410 + need_expand false and the matching 16 bit color libpng erroneously just
1.3411 + treats it as an 8-bit color because of where png_do_expand_16 is in the
1.3412 + transform list. This simple fix reduces the supplied colour to 8-bits,
1.3413 + so it gets smashed, but this is better than the current behavior.
1.3414 + Added tests for expand16, more fixes for palette image tests to pngvalid.
1.3415 + Corrects the code for palette image tests and disables attempts to
1.3416 + validate palette colors.
1.3417 +
1.3418 +Version 1.5.3rc01 [June 3, 2011]
1.3419 + No changes.
1.3420 +
1.3421 +Version 1.5.3rc02 [June 8, 2011]
1.3422 + Fixed uninitialized memory read in png_format_buffer() (Bug report by
1.3423 + Frank Busse, CVE-2011-2501, related to CVE-2004-0421).
1.3424 +
1.3425 +Version 1.5.3beta11 [June 11, 2011]
1.3426 + Fixed png_handle_sCAL which is broken in 1.5. This fixes CVE 2011-2692.
1.3427 + Added sCAL to pngtest.png
1.3428 + Revised documentation about png_set_user_limits() to say that it also affects
1.3429 + png writing.
1.3430 + Revised handling of png_set_user_limits() so that it can increase the
1.3431 + limit beyond the PNG_USER_WIDTH|HEIGHT_MAX; previously it could only
1.3432 + reduce it.
1.3433 + Make the 16-to-8 scaling accurate. Dividing by 256 with no rounding is
1.3434 + wrong (high by one) 25% of the time. Dividing by 257 with rounding is
1.3435 + wrong in 128 out of 65536 cases. Getting the right answer all the time
1.3436 + without division is easy.
1.3437 + Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro.
1.3438 + Added projects/owatcom, an IDE project for OpenWatcom to replace
1.3439 + scripts/makefile.watcom. This project works with OpenWatcom 1.9. The
1.3440 + IDE autogenerates appropriate makefiles (libpng.mk) for batch processing.
1.3441 + The project is configurable, unlike the Visual Studio project, so long
1.3442 + as the developer has an awk.
1.3443 + Changed png_set_gAMA to limit the gamma value range so that the inverse
1.3444 + of the stored value cannot overflow the fixed point representation,
1.3445 + and changed other things OpenWatcom warns about.
1.3446 + Revised pngvalid.c to test PNG_ALPHA_MODE_SUPPORTED correctly. This allows
1.3447 + pngvalid to build when ALPHA_MODE is not supported, which is required if
1.3448 + it is to build on libpng 1.4.
1.3449 + Removed string/memory macros that are no longer used and are not
1.3450 + necessarily fully supportable, particularly png_strncpy and png_snprintf.
1.3451 + Added log option to pngvalid.c and attempted to improve gamma messages.
1.3452 +
1.3453 +Version 1.5.3 [omitted]
1.3454 + People found the presence of a beta release following an rc release
1.3455 + to be confusing; therefore we bump the version to libpng-1.5.4beta01
1.3456 + and there will be no libpng-1.5.3 release.
1.3457 +
1.3458 +Version 1.5.4beta01 [June 14, 2011]
1.3459 + Made it possible to undefine PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
1.3460 + to get the same (inaccurate) output as libpng-1.5.2 and earlier.
1.3461 + Moved definitions of PNG_HAVE_IHDR, PNG_AFTER_IDAT, and PNG_HAVE_PLTE
1.3462 + outside of an unknown-chunk block in png.h because they are also
1.3463 + needed for other uses.
1.3464 +
1.3465 +Version 1.5.4beta02 [June 14, 2011]
1.3466 + Fixed and clarified LEGACY 16-to-8 scaling code.
1.3467 + Added png_set_chop_16() API, to match inaccurate results from previous
1.3468 + libpng versions.
1.3469 + Removed the ACCURATE and LEGACY options (they are no longer useable)
1.3470 + Use the old scaling method for background if png_set_chop_16() was
1.3471 + called.
1.3472 + Made png_set_chop_16() API removeable by disabling PNG_CHOP_16_TO_8_SUPPORTED
1.3473 +
1.3474 +Version 1.5.4beta03 [June 15, 2011]
1.3475 + Fixed a problem in png_do_expand_palette() exposed by optimization in
1.3476 + 1.5.3beta06
1.3477 + Also removed a spurious and confusing "trans" member ("trans") from png_info.
1.3478 + The palette expand optimization prevented expansion to an intermediate RGBA
1.3479 + form if tRNS was present but alpha was marked to be stripped; this exposed
1.3480 + a check for tRNS in png_do_expand_palette() which is inconsistent with the
1.3481 + code elsewhere in libpng.
1.3482 + Correction to the expand_16 code; removed extra instance of
1.3483 + png_set_scale_16_to_8 from pngpriv.h
1.3484 +
1.3485 +Version 1.5.4beta04 [June 16, 2011]
1.3486 + Added a missing "#ifdef PNG_READ_BACKGROUND_SUPPORTED/#endif" in pngrtran.c
1.3487 + Added PNG_TRANSFORM_CHOP_16 to the high-level read transforms.
1.3488 + Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again. If this is
1.3489 + not enabled, png_set_strip_16() and png_do_scale_16_to_8() aren't built.
1.3490 + Revised contrib/visupng, gregbook, and pngminim to demonstrate chop_16_to_8
1.3491 +
1.3492 +Version 1.5.4beta05 [June 16, 2011]
1.3493 + Renamed png_set_strip_16() to png_set_scale_16() and renamed
1.3494 + png_set_chop_16() to png_set_strip(16) in an attempt to minimize the
1.3495 + behavior changes between libpng14 and libpng15.
1.3496 +
1.3497 +Version 1.5.4beta06 [June 18, 2011]
1.3498 + Fixed new bug that was causing both strip_16 and scale_16 to be applied.
1.3499 +
1.3500 +Version 1.5.4beta07 [June 19, 2011]
1.3501 + Fixed pngvalid, simplified macros, added checking for 0 in sCAL.
1.3502 + The ACCURATE scale macro is no longer defined in 1.5 - call the
1.3503 + png_scale_16_to_8 API. Made sure that PNG_READ_16_TO_8 is still defined
1.3504 + if the png_strip_16_to_8 API is present. png_check_fp_number now
1.3505 + maintains some state so that positive, negative and zero values are
1.3506 + identified. sCAL uses these to be strictly spec conformant.
1.3507 +
1.3508 +Version 1.5.4beta08 [June 23, 2011]
1.3509 + Fixed pngvalid if ACCURATE_SCALE is defined.
1.3510 + Updated scripts/pnglibconf.h.prebuilt.
1.3511 +
1.3512 +Version 1.5.4rc01 [June 30, 2011]
1.3513 + Define PNG_ALLOCATED to "restrict" only if MSC_VER >= 1400.
1.3514 +
1.3515 +Version 1.5.4 [July 7, 2011]
1.3516 + No changes.
1.3517 +
1.3518 +Version 1.5.5beta01 [July 13, 2011]
1.3519 + Fixed some typos and made other minor changes in the manual.
1.3520 + Updated contrib/pngminus/makefile.std (Samuli Souminen)
1.3521 +
1.3522 +Version 1.5.5beta02 [July 14, 2011]
1.3523 + Revised Makefile.am and Makefile.in to look in the right directory for
1.3524 + pnglibconf.h.prebuilt
1.3525 +
1.3526 +Version 1.5.5beta03 [July 27, 2011]
1.3527 + Enabled compilation with g++ compiler. This compiler does not recognize
1.3528 + the file extension, so it always compiles with C++ rules. Made minor
1.3529 + changes to pngrutil.c to cast results where C++ expects it but C does not.
1.3530 + Minor editing of libpng.3 and libpng-manual.txt.
1.3531 +
1.3532 +Version 1.5.5beta04 [July 29, 2011]
1.3533 + Revised CMakeLists.txt (Clifford Yapp)
1.3534 + Updated commentary about the png_rgb_to_gray() default coefficients
1.3535 + in the manual and in pngrtran.c
1.3536 +
1.3537 +Version 1.5.5beta05 [August 17, 2011]
1.3538 + Prevent unexpected API exports from non-libpng DLLs on Windows. The "_DLL"
1.3539 + is removed from the test of whether a DLL is being built (this erroneously
1.3540 + caused the libpng APIs to be marked as DLL exports in static builds under
1.3541 + Microsoft Visual Studio). Almost all of the libpng building configuration
1.3542 + is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in
1.3543 + pngconf.h, though, so that it is colocated with the import definition (it
1.3544 + is no longer used anywhere in the installed headers). The VStudio project
1.3545 + definitions have been cleaned up: "_USRDLL" has been removed from the
1.3546 + static library builds (this was incorrect), and PNG_USE_DLL has been added
1.3547 + to pngvalid to test the functionality (pngtest does not supply it,
1.3548 + deliberately). The spurious "_EXPORTS" has been removed from the
1.3549 + libpng build (all these errors were a result of copy/paste between project
1.3550 + configurations.)
1.3551 + Added new types and internal functions for CIE RGB end point handling to
1.3552 + pngpriv.h (functions yet to be implemented).
1.3553 +
1.3554 +Version 1.5.5beta06 [August 26, 2011]
1.3555 + Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set in CMakeLists.txt
1.3556 + (Clifford Yap)
1.3557 + Fixes to rgb_to_gray and cHRM XYZ APIs (John Bowler):
1.3558 + The rgb_to_gray code had errors when combined with gamma correction.
1.3559 + Some pixels were treated as true grey when they weren't and such pixels
1.3560 + and true grey ones were not gamma corrected (the original value of the
1.3561 + red component was used instead). APIs to get and set cHRM using color
1.3562 + space end points have been added and the rgb_to_gray code that defaults
1.3563 + based on cHRM, and the divide-by-zero bug in png_handle_cHRM (CERT
1.3564 + VU#477046, CVE-2011-3328, introduced in 1.5.4) have been corrected.
1.3565 + A considerable number of tests has been added to pngvalid for the
1.3566 + rgb_to_gray transform.
1.3567 + Arithmetic errors in rgb_to_gray whereby the calculated gray value was
1.3568 + truncated to the bit depth rather than rounded have been fixed except in
1.3569 + the 8-bit non-gamma-corrected case (where consistency seems more important
1.3570 + than correctness.) The code still has considerable inaccuracies in the
1.3571 + 8-bit case because 8-bit linear arithmetic is used.
1.3572 +
1.3573 +Version 1.5.5beta07 [September 7, 2011]
1.3574 + Added "$(ARCH)" option to makefile.darwin
1.3575 + Added SunOS support to configure.ac and Makefile.am
1.3576 + Changed png_chunk_benign_error() to png_warning() in png.c, in
1.3577 + png_XYZ_from_xy_checked().
1.3578 +
1.3579 +Version 1.5.5beta08 [September 10, 2011]
1.3580 + Fixed 64-bit compilation errors (gcc). The errors fixed relate
1.3581 + to conditions where types that are 32 bits in the GCC 32-bit
1.3582 + world (uLong and png_size_t) become 64 bits in the 64-bit
1.3583 + world. This produces potential truncation errors which the
1.3584 + compiler correctly flags.
1.3585 + Relocated new HAVE_SOLARIS_LD definition in configure.ac
1.3586 + Constant changes for 64-bit compatibility (removal of L suffixes). The
1.3587 + 16-bit cases still use "L" as we don't have a 16-bit test system.
1.3588 +
1.3589 +Version 1.5.5rc01 [September 15, 2011]
1.3590 + Removed "L" suffixes in pngpriv.h
1.3591 +
1.3592 +Version 1.5.5 [September 22, 2011]
1.3593 + No changes.
1.3594 +
1.3595 +Version 1.5.6beta01 [September 22, 2011]
1.3596 + Fixed some 64-bit type conversion warnings in pngrtran.c
1.3597 + Moved row_info from png_struct to a local variable.
1.3598 + The various interlace mask arrays have been made into arrays of
1.3599 + bytes and made PNG_CONST and static (previously some arrays were
1.3600 + marked PNG_CONST and some weren't).
1.3601 + Additional checks have been added to the transform code to validate the
1.3602 + pixel depths after the transforms on both read and write.
1.3603 + Removed some redundant code from pngwrite.c, in png_destroy_write_struct().
1.3604 + Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4].
1.3605 + This removes the need to allocate temporary strings for chunk names on
1.3606 + the stack in the read/write code. Unknown chunk handling still uses the
1.3607 + string form because this is exposed in the API.
1.3608 +
1.3609 +Version 1.5.6beta02 [September 26, 2011]
1.3610 + Added a note in the manual the png_read_update_info() must be called only
1.3611 + once with a particular info_ptr.
1.3612 + Fixed a typo in the definition of the new PNG_STRING_FROM_CHUNK(s,c) macro.
1.3613 +
1.3614 +Version 1.5.6beta03 [September 28, 2011]
1.3615 + Revised test-pngtest.sh to report FAIL when pngtest fails.
1.3616 + Added "--strict" option to pngtest, to report FAIL when the failure is
1.3617 + only because the resulting valid files are different.
1.3618 + Revised CMakeLists.txt to work with mingw and removed some material from
1.3619 + CMakeLists.txt that is no longer useful in libpng-1.5.
1.3620 +
1.3621 +Version 1.5.6beta04 [October 5, 2011]
1.3622 + Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")."
1.3623 +
1.3624 +Version 1.5.6beta05 [October 12, 2011]
1.3625 + Speed up png_combine_row() for interlaced images. This reduces the generality
1.3626 + of the code, allowing it to be optimized for Adam7 interlace. The masks
1.3627 + passed to png_combine_row() are now generated internally, avoiding
1.3628 + some code duplication and localizing the interlace handling somewhat.
1.3629 + Align png_struct::row_buf - previously it was always unaligned, caused by
1.3630 + a bug in the code that attempted to align it; the code needs to subtract
1.3631 + one from the pointer to take account of the filter byte prepended to
1.3632 + each row.
1.3633 + Optimized png_combine_row() when rows are aligned. This gains a small
1.3634 + percentage for 16-bit and 32-bit pixels in the typical case where the
1.3635 + output row buffers are appropriately aligned. The optimization was not
1.3636 + previously possible because the png_struct buffer was always misaligned.
1.3637 + Fixed bug in png_write_chunk_header() debug print, introduced in 1.5.6beta01.
1.3638 +
1.3639 +Version 1.5.6beta06 [October 17, 2011]
1.3640 + Removed two redundant tests for unitialized row.
1.3641 + Fixed a relatively harmless memory overwrite in compressed text writing
1.3642 + with a 1 byte zlib buffer.
1.3643 + Add ability to call png_read_update_info multiple times to pngvalid.c.
1.3644 + Fixes for multiple calls to png_read_update_info. These fixes attend to
1.3645 + most of the errors revealed in pngvalid, however doing the gamma work
1.3646 + twice results in inaccuracies that can't be easily fixed. There is now
1.3647 + a warning in the code if this is going to happen.
1.3648 + Turned on multiple png_read_update_info in pngvalid transform tests.
1.3649 + Prevent libpng from overwriting unused bits at the end of the image when
1.3650 + it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would
1.3651 + overwrite the partial byte at the end of each row if the row width was not
1.3652 + an exact multiple of 8 bits and the image is not interlaced.
1.3653 +
1.3654 +Version 1.5.6beta07 [October 21, 2011]
1.3655 + Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row
1.3656 + (Mans Rullgard).
1.3657 +
1.3658 +Version 1.5.6rc01 [October 26, 2011]
1.3659 + Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM"
1.3660 +
1.3661 +Version 1.5.6rc02 [October 27, 2011]
1.3662 + Added LSR() macro to defend against buggy compilers that evaluate non-taken
1.3663 + code branches and complain about out-of-range shifts.
1.3664 +
1.3665 +Version 1.5.6rc03 [October 28, 2011]
1.3666 + Renamed the LSR() macro to PNG_LSR() and added PNG_LSL() macro.
1.3667 + Fixed compiler warnings with Intel and MSYS compilers. The logical shift
1.3668 + fix for Microsoft Visual C is required by other compilers, so this
1.3669 + enables that fix for all compilers when using compile-time constants.
1.3670 + Under MSYS 'byte' is a name declared in a system header file, so we
1.3671 + changed the name of a local variable to avoid the warnings that result.
1.3672 + Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h
1.3673 +
1.3674 +Version 1.5.6 [November 3, 2011]
1.3675 + No changes.
1.3676 +
1.3677 +Version 1.5.7beta01 [November 4, 2011]
1.3678 + Added support for ARM processor, when decoding all PNG up-filtered rows
1.3679 + and any other-filtered rows with 3 or 4 bytes per pixel (Mans Rullgard).
1.3680 + Fixed bug in pngvalid on early allocation failure; fixed type cast in
1.3681 + pngmem.c; pngvalid would attempt to call png_error() if the allocation
1.3682 + of a png_struct or png_info failed. This would probably have led to a
1.3683 + crash. The pngmem.c implementation of png_malloc() included a cast
1.3684 + to png_size_t which would fail on large allocations on 16-bit systems.
1.3685 + Fix for the preprocessor of the Intel C compiler. The preprocessor
1.3686 + splits adjacent @ signs with a space; this changes the concatentation
1.3687 + token from @-@-@ to PNG_JOIN; that should work with all compiler
1.3688 + preprocessors.
1.3689 + Paeth filter speed improvements from work by Siarhei Siamashka. This
1.3690 + changes the 'Paeth' reconstruction function to improve the GCC code
1.3691 + generation on x86. The changes are only part of the suggested ones;
1.3692 + just the changes that definitely improve speed and remain simple.
1.3693 + The changes also slightly increase the clarity of the code.
1.3694 +
1.3695 +Version 1.5.7beta02 [November 11, 2011]
1.3696 + Check compression_type parameter in png_get_iCCP and remove spurious
1.3697 + casts. The compression_type parameter is always assigned to, so must
1.3698 + be non-NULL. The cast of the profile length potentially truncated the
1.3699 + value unnecessarily on a 16-bit int system, so the cast of the (byte)
1.3700 + compression type to (int) is specified by ANSI-C anyway.
1.3701 + Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left
1.3702 + the sBIT fields in the test pixel as 0, which resulted in a floating
1.3703 + point division by zero which was irrelevant but causes systems where
1.3704 + FP exceptions cause a crash. Added code to pngvalid to turn on FP
1.3705 + exceptions if the appropriate glibc support is there to ensure this is
1.3706 + tested in the future.
1.3707 + Updated scripts/pnglibconf.mak and scripts/makefile.std to handle the
1.3708 + new PNG_JOIN macro.
1.3709 + Added versioning to pnglibconf.h comments.
1.3710 + Simplified read/write API initial version; basic read/write tested on
1.3711 + a variety of images, limited documentation (in the header file.)
1.3712 + Installed more accurate linear to sRGB conversion tables. The slightly
1.3713 + modified tables reduce the number of 16-bit values that
1.3714 + convert to an off-by-one 8-bit value. The "makesRGB.c" code that was used
1.3715 + to generate the tables is now in a contrib/sRGBtables sub-directory.
1.3716 +
1.3717 +Version 1.5.7beta03 [November 17, 2011]
1.3718 + Removed PNG_CONST from the sRGB table declarations in pngpriv.h and png.c
1.3719 + Added run-time detection of NEON support.
1.3720 + Added contrib/libtests; includes simplified API test and timing test and
1.3721 + a color conversion utility for rapid checking of failed 'pngstest' results.
1.3722 + Multiple transform bug fixes plus a work-round for double gamma correction.
1.3723 + libpng does not support more than one transform that requires linear data
1.3724 + at once - if this is tried typically the results is double gamma
1.3725 + correction. Since the simplified APIs can need rgb to gray combined with
1.3726 + a compose operation it is necessary to do one of these outside the main
1.3727 + libpng transform code. This check-in also contains fixes to various bugs
1.3728 + in the simplified APIs themselves and to some bugs in compose and rgb to
1.3729 + gray (on palette) itself.
1.3730 + Fixes for C++ compilation using g++ When libpng source is compiled
1.3731 + using g++. The compiler imposes C++ rules on the C source; thus it
1.3732 + is desireable to make the source work with either C or C++ rules
1.3733 + without throwing away useful error information. This change adds
1.3734 + png_voidcast to allow C semantic (void*) cases or the corresponding
1.3735 + C++ static_cast operation, as appropriate.
1.3736 + Added --noexecstack to assembler file compilation. GCC does not set
1.3737 + this on assembler compilation, even though it does on C compilation.
1.3738 + This creates security issues if assembler code is enabled; the
1.3739 + work-around is to set it by default in the flags for $(CCAS)
1.3740 + Work around compilers that don't support declaration of const data. Some
1.3741 + compilers fault 'extern const' data declarations (because the data is
1.3742 + not initialized); this turns on const-ness only for compilers where
1.3743 + this is known to work.
1.3744 +
1.3745 +Version 1.5.7beta04 [November 17, 2011]
1.3746 + Since the gcc driver does not recognize the --noexecstack flag, we must
1.3747 + use the -Wa prefix to have it passed through to the assembler.
1.3748 + Also removed a duplicate setting of this flag.
1.3749 + Added files that were omitted from the libpng-1.5.7beta03 zip distribution.
1.3750 +
1.3751 +Version 1.5.7beta05 [November 25, 2011]
1.3752 + Removed "zTXt" from warning in generic chunk decompression function.
1.3753 + Validate time settings passed to pngset() and png_convert_to_rfc1123()
1.3754 + (Frank Busse).
1.3755 + Added MINGW support to CMakeLists.txt
1.3756 + Reject invalid compression flag or method when reading the iTXt chunk.
1.3757 + Backed out 'simplified' API changes. The API seems too complex and there
1.3758 + is a lack of consensus or enthusiasm for the proposals. The API also
1.3759 + reveals significant bugs inside libpng (double gamma correction and the
1.3760 + known bug of being unable to retrieve a corrected palette). It seems
1.3761 + better to wait until the bugs, at least, are corrected.
1.3762 + Moved pngvalid.c into contrib/libtests
1.3763 + Rebuilt Makefile.in, configure, etc., with autoconf-2.68
1.3764 +
1.3765 +Version 1.5.7rc01 [December 1, 2011]
1.3766 + Replaced an "#if" with "#ifdef" in pngrtran.c
1.3767 + Revised #if PNG_DO_BC block in png.c (use #ifdef and add #else)
1.3768 +
1.3769 +Version 1.5.7rc02 [December 5, 2011]
1.3770 + Revised project files and contrib/pngvalid/pngvalid.c to account for
1.3771 + the relocation of pngvalid into contrib/libtests.
1.3772 + Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400,
1.3773 + as in libpng-1.5.4.
1.3774 + Put CRLF line endings in the owatcom project files.
1.3775 +
1.3776 +Version 1.5.7rc03 [December 7, 2011]
1.3777 + Updated CMakeLists.txt to account for the relocation of pngvalid.c
1.3778 +
1.3779 +Version 1.5.7 [December 15, 2011]
1.3780 + Minor fixes to pngvalid.c for gcc 4.6.2 compatibility to remove warnings
1.3781 + reported by earlier versions.
1.3782 + Fixed minor memset/sizeof errors in pngvalid.c.
1.3783 +
1.3784 +Version 1.6.0beta01 [December 15, 2011]
1.3785 + Removed machine-generated configure files from the GIT repository (they will
1.3786 + continue to appear in the tarball distributions and in the libpng15 and
1.3787 + earlier GIT branches).
1.3788 + Restored the new 'simplified' API, which was started in libpng-1.5.7beta02
1.3789 + but later deleted from libpng-1.5.7beta05.
1.3790 + Added example programs for the new 'simplified' API.
1.3791 + Added ANSI-C (C90) headers and require them, and take advantage of the
1.3792 + change. Also fixed some of the projects/* and contrib/* files that needed
1.3793 + updates for libpng16 and the move of pngvalid.c.
1.3794 + With this change the required ANSI-C header files are assumed to exist: the
1.3795 + implementation must provide float.h, limits.h, stdarg.h and stddef.h and
1.3796 + libpng relies on limits.h and stddef.h existing and behaving as defined
1.3797 + (the other two required headers aren't used). Non-ANSI systems that don't
1.3798 + have stddef.h or limits.h will have to provide an appropriate fake
1.3799 + containing the relevant types and #defines.
1.3800 + The use of FAR/far has been eliminated and the definition of png_alloc_size_t
1.3801 + is now controlled by a flag so that 'small size_t' systems can select it
1.3802 + if necessary. Libpng 1.6 may not currently work on such systems -- it
1.3803 + seems likely that it will ask 'malloc' for more than 65535 bytes with any
1.3804 + image that has a sufficiently large row size (rather than simply failing
1.3805 + to read such images).
1.3806 + New tools directory containing tools used to generate libpng code.
1.3807 + Fixed race conditions in parallel make builds. With higher degrees of
1.3808 + parallelism during 'make' the use of the same temporary file names such
1.3809 + as 'dfn*' can result in a race where a temporary file from one arm of the
1.3810 + build is deleted or overwritten in another arm. This changes the
1.3811 + temporary files for suffix rules to always use $* and ensures that the
1.3812 + non-suffix rules use unique file names.
1.3813 +
1.3814 +Version 1.6.0beta02 [December 21, 2011]
1.3815 + Correct configure builds where build and source directories are separate.
1.3816 + The include path of 'config.h' was erroneously made relative in pngvalid.c
1.3817 + in libpng 1.5.7.
1.3818 +
1.3819 +Version 1.6.0beta03 [December 22, 2011]
1.3820 + Start-up code size improvements, error handler flexibility. These changes
1.3821 + alter how the tricky allocation of the initial png_struct and png_info
1.3822 + structures are handled. png_info is now handled in pretty much the same
1.3823 + way as everything else, except that the allocations handle NULL return
1.3824 + silently. png_struct is changed in a similar way on allocation and on
1.3825 + deallocation a 'safety' error handler is put in place (which should never
1.3826 + be required). The error handler itself is changed to permit mismatches
1.3827 + in the application and libpng error buffer size; however, this means a
1.3828 + silent change to the API to return the jmp_buf if the size doesn't match
1.3829 + the size from the libpng compilation; libpng now allocates the memory and
1.3830 + this may fail. Overall these changes result in slight code size
1.3831 + reductions; however, this is a reduction in code that is always executed
1.3832 + so is particularly valuable. Overall on a 64-bit system the libpng DLL
1.3833 + decreases in code size by 1733 bytes. pngerror.o increases in size by
1.3834 + about 465 bytes because of the new functionality.
1.3835 + Added png_convert_to_rfc1123_buffer() and deprecated png_convert_to_rfc1123()
1.3836 + to avoid including a spurious buffer in the png_struct.
1.3837 +
1.3838 +Version 1.6.0beta04 [December 30, 2011]
1.3839 + Regenerated configure scripts with automake-1.11.2
1.3840 + Eliminated png_info_destroy(). It is now used only in png.c and only calls
1.3841 + one other internal function and memset().
1.3842 + Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously
1.3843 + it was disabled whenever internal fixed point arithmetic was selected,
1.3844 + which meant it didn't exist even on systems where FP was available but not
1.3845 + preferred.
1.3846 + Added pngvalid.c compile time checks for const APIs.
1.3847 + Implemented 'restrict' for png_info and png_struct. Because of the way
1.3848 + libpng works both png_info and png_struct are always accessed via a
1.3849 + single pointer. This means adding C99 'restrict' to the pointer gives
1.3850 + the compiler some opportunity to optimize the code. This change allows
1.3851 + that.
1.3852 + Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper
1.3853 + location in configure.ac (Gilles Espinasse).
1.3854 + Changed png_memcpy to C assignment where appropriate. Changed all those
1.3855 + uses of png_memcpy that were doing a simple assignment to assignments
1.3856 + (all those cases where the thing being copied is a non-array C L-value).
1.3857 + Added some error checking to png_set_*() routines.
1.3858 + Removed the reference to the non-exported function png_memcpy() from
1.3859 + example.c.
1.3860 + Fixed the Visual C 64-bit build - it requires jmp_buf to be aligned, but
1.3861 + it had become misaligned.
1.3862 + Revised contrib/pngminus/pnm2png.c to avoid warnings when png_uint_32
1.3863 + and unsigned long are of different sizes.
1.3864 +
1.3865 +Version 1.6.0beta05 [January 15, 2012]
1.3866 + Updated manual with description of the simplified API (copied from png.h)
1.3867 + Fix bug in pngerror.c: some long warnings were being improperly truncated
1.3868 + (CVE-2011-3464, bug introduced in libpng-1.5.3beta05).
1.3869 +
1.3870 +Version 1.6.0beta06 [January 24, 2012]
1.3871 + Added palette support to the simplified APIs. This commit
1.3872 + changes some of the macro definitions in png.h, app code
1.3873 + may need corresponding changes.
1.3874 + Increased the formatted warning buffer to 192 bytes.
1.3875 + Added color-map support to simplified API. This is an initial version for
1.3876 + review; the documentation has not yet been updated.
1.3877 + Fixed Min/GW uninstall to remove libpng.dll.a
1.3878 +
1.3879 +Version 1.6.0beta07 [January 28, 2012]
1.3880 + Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived)
1.3881 + compiler issues slightly different warnings from those issued by the
1.3882 + current vesions of GCC. This eliminates those warnings by
1.3883 + adding/removing casts and small code rewrites.
1.3884 + Updated configure.ac from autoupdate: added --enable-werror option.
1.3885 + Also some layout regularization and removal of introduced tab characters
1.3886 + (replaced with 3-character indentation). Obsolete macros identified by
1.3887 + autoupdate have been removed; the replacements are all in 2.59 so
1.3888 + the pre-req hasn't been changed. --enable-werror checks for support
1.3889 + for -Werror (or the given argument) in the compiler. This mimics the
1.3890 + gcc configure option by allowing -Werror to be turned on safely; without
1.3891 + the option the tests written in configure itself fail compilation because
1.3892 + they cause compiler warnings.
1.3893 + Rewrote autogen.sh to run autoreconf instead of running tools one-by-one.
1.3894 + Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt and
1.3895 + set CMAKE_LIBRARY_OUTPUT_DIRECTORY to "lib" on all platforms (C. Yapp).
1.3896 + Freeze libtool files in the 'scripts' directory. This version of autogen.sh
1.3897 + attempts to dissuade people from running it when it is not, or should not,
1.3898 + be necessary. In fact, autogen.sh does not work when run in a libpng
1.3899 + directory extracted from a tar distribution anymore. You must run it in
1.3900 + a GIT clone instead.
1.3901 + Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale),
1.3902 + and renamed three whose names were inconsistent with those in
1.3903 + pngsuite/README.txt.
1.3904 +
1.3905 +Version 1.6.0beta08 [February 1, 2012]
1.3906 + Fixed Image::colormap misalignment in pngstest.c
1.3907 + Check libtool/libtoolize version number (2.4.2) in configure.ac
1.3908 + Divide test-pngstest.sh into separate pngstest runs for basic and
1.3909 + transparent images.
1.3910 + Moved automake options to AM_INIT_AUTOMAKE in configure.ac
1.3911 + Added color-tests, silent-rules (Not yet implemented in Makefile.am) and
1.3912 + version checking to configure.ac
1.3913 + Improved pngstest speed by not doing redundant tests and add const to
1.3914 + the background parameter of png_image_finish_read. The --background
1.3915 + option is now done automagically only when required, so that commandline
1.3916 + option no longer exists.
1.3917 + Cleaned up pngpriv.h to consistently declare all functions and data.
1.3918 + Also eliminated PNG_CONST_DATA, which is apparently not needed but we
1.3919 + can't be sure until it is gone.
1.3920 + Added symbol prefixing that allows all the libpng external symbols
1.3921 + to be prefixed (suggested by Reuben Hawkins).
1.3922 + Updated "ftbb*.png" list in the owatcom and vstudio projects.
1.3923 + Fixed 'prefix' builds on clean systems. The generation of pngprefix.h
1.3924 + should not require itself.
1.3925 + Updated INSTALL to explain that autogen.sh must be run in a GIT clone,
1.3926 + not in a libpng directory extracted from a tar distribution.
1.3927 +
1.3928 +Version 1.6.0beta09 [February 1, 2012]
1.3929 + Reverted the prebuilt configure files to libpng-1.6.0beta05 condition.
1.3930 +
1.3931 +Version 1.6.0beta10 [February 3, 2012]
1.3932 + Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests
1.3933 + Updated list of test images in CMakeLists.txt
1.3934 + Updated the prebuilt configure files to current condition.
1.3935 + Revised INSTALL information about autogen.sh; it works in tar distributions.
1.3936 +
1.3937 +Version 1.6.0beta11 [February 16, 2012]
1.3938 + Fix character count in pngstest command in projects/owatcom/pngstest.tgt
1.3939 + Revised test-pngstest.sh to report PASS/FAIL for each image.
1.3940 + Updated documentation about the simplified API.
1.3941 + Corrected estimate of error in libpng png_set_rgb_to_gray API. The API is
1.3942 + extremely inaccurate for sRGB conversions because it uses an 8-bit
1.3943 + intermediate linear value and it does not use the sRGB transform, so it
1.3944 + suffers from the known instability in gamma transforms for values close
1.3945 + to 0 (see Poynton). The net result is that the calculation has a maximum
1.3946 + error of 14.99/255; 0.5/255^(1/2.2). pngstest now uses 15 for the
1.3947 + permitted 8-bit error. This may still not be enough because of arithmetic
1.3948 + error.
1.3949 + Removed some unused arrays (with #ifdef) from png_read_push_finish_row().
1.3950 + Fixed a memory overwrite bug in simplified read of RGB PNG with
1.3951 + non-linear gamma Also bugs in the error checking in pngread.c and changed
1.3952 + quite a lot of the checks in pngstest.c to be correct; either correctly
1.3953 + written or not over-optimistic. The pngstest changes are insufficient to
1.3954 + allow all possible RGB transforms to be passed; pngstest cmppixel needs
1.3955 + to be rewritten to make it clearer which errors it allows and then changed
1.3956 + to permit known inaccuracies.
1.3957 + Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h
1.3958 + Fixed fixed/float API export conditionals. 1) If FIXED_POINT or
1.3959 + FLOATING_POINT options were switched off, png.h ended up with lone ';'
1.3960 + characters. This is not valid ANSI-C outside a function. The ';'
1.3961 + characters have been moved inside the definition of PNG_FP_EXPORT and
1.3962 + PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration
1.3963 + of the corresponding functions were completely omitted, even though some
1.3964 + of them are still used internally. The result is still valid, but
1.3965 + produces warnings from gcc with some warning options (including -Wall). The
1.3966 + fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION
1.3967 + when png.h is included from pngpriv.h.
1.3968 + Check for invalid palette index while reading paletted PNG. When one is
1.3969 + found, issue a warning and increase png_ptr->num_palette accordingly.
1.3970 + Apps are responsible for checking to see if that happened.
1.3971 +
1.3972 +Version 1.6.0beta12 [February 18, 2012]
1.3973 + Do not increase num_palette on invalid_index.
1.3974 + Relocated check for invalid palette index to pngrtran.c, after unpacking
1.3975 + the sub-8-bit pixels.
1.3976 + Fixed CVE-2011-3026 buffer overrun bug. This bug was introduced when
1.3977 + iCCP chunk support was added at libpng-1.0.6. Deal more correctly with the
1.3978 + test on iCCP chunk length. Also removed spurious casts that may hide
1.3979 + problems on 16-bit systems.
1.3980 +
1.3981 +Version 1.6.0beta13 [February 24, 2012]
1.3982 + Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from
1.3983 + pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c;
1.3984 + now that png_ptr->buffer is inaccessible to applications, the special
1.3985 + handling is no longer useful.
1.3986 + Added PNG_SAFE_LIMITS feature to pnglibconf.dfa, pngpriv.h, and new
1.3987 + pngusr.dfa to reset the user limits to safe ones if PNG_SAFE_LIMITS is
1.3988 + defined. To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED=1" on the
1.3989 + configure command or put #define PNG_SAFE_LIMITS_SUPPORTED in
1.3990 + pnglibconf.h.prebuilt and pnglibconf.h.
1.3991 +
1.3992 +Version 1.6.0beta14 [February 27, 2012]
1.3993 + Added information about the new limits in the manual.
1.3994 + Updated Makefile.in
1.3995 +
1.3996 +Version 1.6.0beta15 [March 2, 2012]
1.3997 + Removed unused "current_text" members of png_struct and the png_free()
1.3998 + of png_ptr->current_text from pngread.c
1.3999 + Rewrote pngstest.c for substantial speed improvement.
1.4000 + Fixed transparent pixel and 16-bit rgb tests in pngstest and removed a
1.4001 + spurious check in pngwrite.c
1.4002 + Added PNG_IMAGE_FLAG_FAST for the benefit of applications that store
1.4003 + intermediate files, or intermediate in-memory data, while processing
1.4004 + image data with the simplified API. The option makes the files larger
1.4005 + but faster to write and read. pngstest now uses this by default; this
1.4006 + can be disabled with the --slow option.
1.4007 + Improved pngstest fine tuning of error numbers, new test file generator.
1.4008 + The generator generates images that test the full range of sample values,
1.4009 + allow the error numbers in pngstest to be tuned and checked. makepng
1.4010 + also allows generation of images with extra chunks, although this is
1.4011 + still work-in-progress.
1.4012 + Added check for invalid palette index while reading.
1.4013 + Fixed some bugs in ICC profile writing. The code should now accept
1.4014 + all potentially valid ICC profiles and reject obviously invalid ones.
1.4015 + It now uses png_error() to do so rather than casually writing a PNG
1.4016 + without the necessary color data.
1.4017 + Removed whitespace from the end of lines in all source files and scripts.
1.4018 +
1.4019 +Version 1.6.0beta16 [March 6, 2012]
1.4020 + Relocated palette-index checking function from pngrutil.c to pngtrans.c
1.4021 + Added palette-index checking while writing.
1.4022 + Changed png_inflate() and calling routines to avoid overflow problems.
1.4023 + This is an intermediate check-in that solves the immediate problems and
1.4024 + introduces one performance improvement (avoiding a copy via png_ptr->zbuf.)
1.4025 + Further changes will be made to make ICC profile handling more secure.
1.4026 + Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default options
1.4027 + declares 'index' as a global, causing a warning if it is used as a local
1.4028 + variable. GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit)
1.4029 + to an (int) (signed 32-bit). MSVC, however, warns about using the
1.4030 + unary '-' operator on an unsigned value (even though it is well defined
1.4031 + by ANSI-C to be ~x+1). The padding calculation was changed to use a
1.4032 + different method. Removed the tests on png_ptr->pass.
1.4033 + Added contrib/libtests/tarith.c to test internal arithmetic functions from
1.4034 + png.c. This is a libpng maintainer program used to validate changes to the
1.4035 + internal arithmetic functions.
1.4036 + Made read 'inflate' handling like write 'deflate' handling. The read
1.4037 + code now claims and releases png_ptr->zstream, like the write code.
1.4038 + The bug whereby the progressive reader failed to release the zstream
1.4039 + is now fixed, all initialization is delayed, and the code checks for
1.4040 + changed parameters on deflate rather than always calling
1.4041 + deflatedEnd/deflateInit.
1.4042 + Validate the zTXt strings in pngvalid.
1.4043 + Added code to validate the windowBits value passed to deflateInit2().
1.4044 + If the call to deflateInit2() is wrong a png_warning will be issued
1.4045 + (in fact this is harmless, but the PNG data produced may be sub-optimal).
1.4046 +
1.4047 +Version 1.6.0beta17 [March 10, 2012]
1.4048 + Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition.
1.4049 + Reject all iCCP chunks after the first, even if the first one is invalid.
1.4050 + Deflate/inflate was reworked to move common zlib calls into single
1.4051 + functions [rw]util.c. A new shared keyword check routine was also added
1.4052 + and the 'zbuf' is no longer allocated on progressive read. It is now
1.4053 + possible to call png_inflate() incrementally. A warning is no longer
1.4054 + issued if the language tag or translated keyword in the iTXt chunk
1.4055 + has zero length.
1.4056 + If benign errors are disabled use maximum window on ancilliary inflate.
1.4057 + This works round a bug introduced in 1.5.4 where compressed ancillary
1.4058 + chunks could end up with a too-small windowBits value in the deflate
1.4059 + header.
1.4060 +
1.4061 +Version 1.6.0beta18 [March 16, 2012]
1.4062 + Issue a png_benign_error() instead of png_warning() about bad palette index.
1.4063 + In pngtest, treat benign errors as errors if "-strict" is present.
1.4064 + Fixed an off-by-one error in the palette index checking function.
1.4065 + Fixed a compiler warning under Cygwin (Windows-7, 32-bit system)
1.4066 + Revised example.c to put text strings in a temporary character array
1.4067 + instead of directly assigning string constants to png_textp members.
1.4068 + This avoids compiler warnings when -Wwrite-strings is enabled.
1.4069 + Added output flushing to aid debugging under Visual Studio. Unfortunately
1.4070 + this is necessary because the VS2010 output window otherwise simply loses
1.4071 + the error messages on error (they weren't flushed to the window before
1.4072 + the process exited, apparently!)
1.4073 + Added configuration support for benign errors and changed the read
1.4074 + default. Also changed some warnings in the iCCP and sRGB handling
1.4075 + from to benign errors. Configuration now makes read benign
1.4076 + errors warnings and write benign errors to errors by default (thus
1.4077 + changing the behavior on read). The simplified API always forces
1.4078 + read benign errors to warnings (regardless of the system default, unless
1.4079 + this is disabled in which case the simplified API can't be built.)
1.4080 +
1.4081 +Version 1.6.0beta19 [March 18, 2012]
1.4082 + Work around for duplicate row start calls; added warning messages.
1.4083 + This turns on PNG_FLAG_DETECT_UNINITIALIZED to detect app code that
1.4084 + fails to call one of the 'start' routines (not enabled in libpng-1.5
1.4085 + because it is technically an API change, since it did normally work
1.4086 + before.) It also makes duplicate calls to png_read_start_row (an
1.4087 + internal function called at the start of the image read) benign, as
1.4088 + they were before changes to use png_inflate_claim. Somehow webkit is
1.4089 + causing this to happen; this is probably a mis-feature in the zlib
1.4090 + changes so this commit is only a work-round.
1.4091 + Removed erroneous setting of DETECT_UNINITIALIZED and added more
1.4092 + checks. The code now does a png_error if an attempt is made to do the
1.4093 + row initialization twice; this is an application error and it has
1.4094 + serious consequences because the transform data in png_struct is
1.4095 + changed by each call.
1.4096 + Added application error reporting and added chunk names to read
1.4097 + benign errors; also added --strict to pngstest - not enabled
1.4098 + yet because a warning is produced.
1.4099 + Avoid the double gamma correction warning in the simplified API.
1.4100 + This allows the --strict option to pass in the pngstest checks
1.4101 +
1.4102 +Version 1.6.0beta20 [March 29, 2012]
1.4103 + Changed chunk handler warnings into benign errors, incrementally load iCCP
1.4104 + Added checksum-icc.c to contrib/tools
1.4105 + Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice.
1.4106 + Recognize known sRGB ICC profiles while reading; prefer writing the
1.4107 + iCCP profile over writing the sRGB chunk, controlled by the
1.4108 + PNG_sRGB_PROFILE_CHECKS option.
1.4109 + Revised png_set_text_2() to avoid potential memory corruption (fixes
1.4110 + CVE-2011-3048, also known as CVE-2012-3425).
1.4111 +
1.4112 +Version 1.6.0beta21 [April 27, 2012]
1.4113 + Revised scripts/makefile.darwin: use system zlib; remove quotes around
1.4114 + architecture list; add missing ppc architecture; add architecture options
1.4115 + to shared library link; don't try to create a shared lib based on missing
1.4116 + RELEASE variable.
1.4117 + Enable png_set_check_for_invalid_index() for both read and write.
1.4118 + Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpriv.h around
1.4119 + declaration of png_handle_unknown().
1.4120 + Added -lssp_nonshared in a comment in scripts/makefile.freebsd
1.4121 + and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE.
1.4122 +
1.4123 +Version 1.6.0beta22 [May 23, 2012]
1.4124 + Removed need for -Wno-cast-align with clang. clang correctly warns on
1.4125 + alignment increasing pointer casts when -Wcast-align is passed. This
1.4126 + fixes the cases that clang warns about either by eliminating the
1.4127 + casts from png_bytep to png_uint_16p (pngread.c), or, for pngrutil.c
1.4128 + where the cast is previously verified or pngstest.c where it is OK, by
1.4129 + introducing new png_aligncast macros to do the cast in a way that clang
1.4130 + accepts.
1.4131 +
1.4132 +Version 1.6.0beta23 [June 6, 2012]
1.4133 + Revised CMakeLists.txt to not attempt to make a symlink under mingw.
1.4134 + Made fixes for new optimization warnings from gcc 4.7.0. The compiler
1.4135 + performs an optimization which is safe; however it then warns about it.
1.4136 + Changing the type of 'palette_number' in pngvalid.c removes the warning.
1.4137 + Do not depend upon a GCC feature macro being available for use in generating
1.4138 + the linker mapfile symbol prefix.
1.4139 + Improved performance of new do_check_palette_indexes() function (only
1.4140 + update the value when it actually increases, move test for whether
1.4141 + the check is wanted out of the function.
1.4142 +
1.4143 +Version 1.6.0beta24 [June 7, 2012]
1.4144 + Don't check palette indexes if num_palette is 0 (as it can be in MNG files).
1.4145 +
1.4146 +Version 1.6.0beta25 [June 16, 2012]
1.4147 + Revised png_set_keep_unknown_chunks() so num_chunks < 0 means ignore all
1.4148 + unknown chunks and all known chunks except for IHDR, PLTE, tRNS, IDAT,
1.4149 + and IEND. Previously it only meant ignore all unknown chunks, the
1.4150 + same as num_chunks == 0. Revised png_image_skip_unused_chunks() to
1.4151 + provide a list of chunks to be processed instead of a list of chunks to
1.4152 + ignore. Revised contrib/gregbook/readpng2.c accordingly.
1.4153 +
1.4154 +Version 1.6.0beta26 [July 10, 2012]
1.4155 + Removed scripts/makefile.cegcc from the *.zip and *.7z distributions; it
1.4156 + depends on configure, which is not included in those archives.
1.4157 + Moved scripts/chkfmt to contrib/tools.
1.4158 + Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386.
1.4159 +
1.4160 +Version 1.6.0beta27 [August 11, 2012]
1.4161 + Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3.
1.4162 + Do not use __restrict when GNUC is <= 3.1
1.4163 + Removed references to png_zalloc() and png_zfree() from the manual.
1.4164 + Fixed configurations where floating point is completely disabled. Because
1.4165 + of the changes to support symbol prefixing PNG_INTERNAL_FUNCTION declares
1.4166 + floating point APIs during libpng builds even if they are completely
1.4167 + disabled. This requires the png floating point types (png_double*) to be
1.4168 + declared even though the functions are never actually defined. This
1.4169 + change provides a dummy definition so that the declarations work, yet any
1.4170 + implementation will fail to compile because of an incomplete type.
1.4171 + Re-eliminated the use of strcpy() in pngtest.c. An unncessary use of
1.4172 + strcpy() was accidentally re-introduced in libpng16; this change replaces
1.4173 + it with strncpy().
1.4174 + Eliminated use of png_sizeof(); use sizeof() instead.
1.4175 + Use a consistent style for (sizeof type) and (sizeof (array))
1.4176 + Cleanup of png_set_filler(). This function does very different things on
1.4177 + read and write. In libpng 1.6 the two cases can be distinguished and
1.4178 + considerable code cleanup, and extra error checking, is possible. This
1.4179 + makes calls on the write side that have no effect be ignored with a
1.4180 + png_app_error(), which can be disabled in the app using
1.4181 + png_set_benign_errors(), and removes the spurious use of usr_channels
1.4182 + on the read side.
1.4183 + Insist on autotools 1.12.1 for git builds because there are security issues
1.4184 + with 1.12 and insisting on anything less would allow 1.12 to be used.
1.4185 + Removed info_ptr->signature[8] from WRITE-only builds.
1.4186 + Add some conditions for compiling png_fixed(). This is a small function
1.4187 + but it requires "-lm" on some platforms.
1.4188 + Cause pngtest --strict to fail on any warning from libpng (not just errors)
1.4189 + and cause it not to fail at the comparison step if libpng lacks support
1.4190 + for writing chunks that it reads from the input (currently only implemented
1.4191 + for compressed text chunks).
1.4192 + Make all three "make check" test programs work without READ or WRITE support.
1.4193 + Now "make check" will succeed even if libpng is compiled with -DPNG_NO_READ
1.4194 + or -DPNG_NO_WRITE. The tests performed are reduced, but the basic reading
1.4195 + and writing of a PNG file is always tested by one or more of the tests.
1.4196 + Consistently use strlen(), memset(), memcpy(), and memcmp() instead of the
1.4197 + png_strlen(), png_memset(), png_memcpy(), and png_memcmp() macros.
1.4198 + Removed the png_sizeof(), png_strlen(), png_memset(), png_memcpy(), and
1.4199 + png_memcmp() macros.
1.4200 + Work around gcc 3.x and Microsoft Visual Studio 2010 complaints. Both object
1.4201 + to the split initialization of num_chunks.
1.4202 +
1.4203 +Version 1.6.0beta28 [August 29, 2012]
1.4204 + Unknown handling fixes and clean up. This adds more correct option
1.4205 + control of the unknown handling, corrects the pre-existing bug where
1.4206 + the per-chunk 'keep' setting is ignored and makes it possible to skip
1.4207 + IDAT chunks in the sequential reader (broken in earlier 1.6 versions).
1.4208 + There is a new test program, test-unknown.c, which is a work in progress
1.4209 + (not currently part of the test suite). Comments in the header files now
1.4210 + explain how the unknown handling works.
1.4211 + Allow fine grain control of unknown chunk APIs. This change allows
1.4212 + png_set_keep_unknown_chunks() to be turned off if not required and causes
1.4213 + both read and write to behave appropriately (on read this is only possible
1.4214 + if the user callback is used to handle unknown chunks). The change
1.4215 + also removes the support for storing unknown chunks in the info_struct
1.4216 + if the only unknown handling enabled is via the callback, allowing libpng
1.4217 + to be configured with callback reading and none of the unnecessary code.
1.4218 + Corrected fix for unknown handling in pngtest. This reinstates the
1.4219 + libpng handling of unknown chunks other than vpAg and sTER (including
1.4220 + unsafe-to-copy chunks which were dropped before) and eliminates the
1.4221 + repositioning of vpAg and sTER in pngtest.png by changing pngtest.png
1.4222 + (so the chunks are where libpng would put them).
1.4223 + Added "tunknown" test and corrected a logic error in png_handle_unknown()
1.4224 + when SAVE support is absent. Moved the shell test scripts for
1.4225 + contrib/libtests from the libpng top directory to contrib/libtests.
1.4226 + png_handle_unknown() must always read or skip the chunk, if
1.4227 + SAVE_UNKNOWN_CHUNKS is turned off *and* the application does not set
1.4228 + a user callback an unknown chunk will not be read, leading to a read
1.4229 + error, which was revealed by the "tunknown" test.
1.4230 + Cleaned up and corrected ICC profile handling.
1.4231 + contrib/libtests/makepng: corrected 'rgb' and 'gray' cases. profile_error
1.4232 + messages could be truncated; made a correct buffer size calculation and
1.4233 + adjusted pngerror.c appropriately. png_icc_check_* checking improved;
1.4234 + changed the functions to receive the correct color type of the PNG on read
1.4235 + or write and check that it matches the color space of the profile (despite
1.4236 + what the comments said before, there is danger in assuming the app will
1.4237 + cope correctly with an RGB profile on a grayscale image and, since it
1.4238 + violates the PNG spec, allowing it is certain to produce inconsistent
1.4239 + app behavior and might even cause app crashes.) Check that profiles
1.4240 + contain the tags needed to process the PNG (tags all required by the ICC
1.4241 + spec). Removed unused PNG_STATIC from pngpriv.h.
1.4242 +
1.4243 +Version 1.6.0beta29 [September 4, 2012]
1.4244 + Fixed the simplified API example programs to add the *colormap parameter
1.4245 + to several of he API and improved the error message if the version field
1.4246 + is not set.
1.4247 + Added contrib/examples/* to the *.zip and *.7z distributions.
1.4248 + Updated simplified API synopses and description of the png_image structure
1.4249 + in the manual.
1.4250 + Made makepng and pngtest produce identical PNGs, add "--relaxed" option
1.4251 + to pngtest. The "--relaxed" option turns off the benign errors that are
1.4252 + enabled by default in pre-RC builds. makepng can now write ICC profiles
1.4253 + where the length has not been extended to a multiple of 4, and pngtest
1.4254 + now intercepts all libpng errors, allowing the previously-introduced
1.4255 + "--strict test" on no warnings to actually work.
1.4256 + Improved ICC profile handling including cHRM chunk generation and fixed
1.4257 + Cygwin+MSVC build errors. The ICC profile handling now includes more
1.4258 + checking. Several errors that caused rejection of the profile are now
1.4259 + handled with a warning in such a way that the invalid profiles will be
1.4260 + read by default in release (but not pre-RC) builds but will not be
1.4261 + written by default. The easy part of handling the cHRM chunk is written,
1.4262 + where the ICC profile contains the required data. The more difficult
1.4263 + part plus guessing a gAMA value requires code to pass selected RGB values
1.4264 + through the profile.
1.4265 +
1.4266 +Version 1.6.0beta30 [October 24, 2012]
1.4267 + Changed ICC profile matrix/vector types to not depend on array type rules.
1.4268 + By the ANSI-C standard the new types should be identical to the previous
1.4269 + versions, and all known versions of gcc tested with the previous versions
1.4270 + except for GCC-4.2.1 work with this version. The change makes the ANSI-C
1.4271 + rule that const applied to an array of elements applies instead to the
1.4272 + elements in the array moot by explicitly applying const to the base
1.4273 + elements of the png_icc_matrix and png_icc_vector types. The accidental
1.4274 + (harmless) 'const' previously applied to the parameters of two of the
1.4275 + functions have also been removed.
1.4276 + Added a work around for GCC 4.2 optimization bug.
1.4277 + Marked the broken (bad white point) original HP sRGB profiles correctly and
1.4278 + correct comments.
1.4279 + Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7
1.4280 + Use /MDd for vstudio debug builds. Also added pngunkown to the vstudio
1.4281 + builds, fixed build errors and corrected a minor exit code error in
1.4282 + pngvalid if the 'touch' file name is invalid.
1.4283 + Add updated WARNING file to projects/vstudio from libpng 1.5/vstudio
1.4284 + Fixed build when using #define PNG_NO_READ_GAMMA in png_do_compose() in
1.4285 + pngrtran.c (Domani Hannes).
1.4286 +
1.4287 +Version 1.6.0beta31 [November 1, 2012]
1.4288 + Undid the erroneous change to vstudio/pngvalid build in libpng-1.6.0beta30.
1.4289 + Made pngvalid so that it will build outside the libpng source tree.
1.4290 + Made builds -DPNG_NO_READ_GAMMA compile (the unit tests still fail).
1.4291 + Made PNG_NO_READ_GAMMA switch off interfaces that depend on READ_GAMMA.
1.4292 + Prior to 1.6.0 switching off READ_GAMMA did unpredictable things to the
1.4293 + interfaces that use it (specifically, png_do_background in 1.4 would
1.4294 + simply display composite for grayscale images but do composition
1.4295 + with the incorrect arithmetic for color ones). In 1.6 the semantic
1.4296 + of -DPNG_NO_READ_GAMMA is changed to simply disable any interface that
1.4297 + depends on it; this obliges people who set it to consider whether they
1.4298 + really want it off if they happen to use any of the interfaces in
1.4299 + question (typically most users who disable it won't).
1.4300 + Fixed GUIDs in projects/vstudio. Some were duplicated or missing,
1.4301 + resulting in VS2010 having to update the files.
1.4302 + Removed non-working ICC profile support code that was mostly added to
1.4303 + libpng-1.6.0beta29 and beta30. There was too much code for too little
1.4304 + gain; implementing full ICC color correction may be desireable but is left
1.4305 + up to applications.
1.4306 +
1.4307 +Version 1.6.0beta32 [November 25, 2012]
1.4308 + Fixed an intermittent SEGV in pngstest due to an uninitialized array element.
1.4309 + Added the ability for contrib/libtests/makepng.c to make a PNG with just one
1.4310 + color. This is useful for debugging pngstest color inaccuracy reports.
1.4311 + Fixed error checking in the simplified write API (Olaf van der Spek)
1.4312 + Made png_user_version_check() ok to use with libpng version 1.10.x and later.
1.4313 +
1.4314 +Version 1.6.0beta33 [December 15, 2012]
1.4315 + Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX)
1.4316 + that causes the MALLOC_MAX limit not to work (John Bowler)
1.4317 + Change png_warning() to png_app_error() in pngwrite.c and comment the
1.4318 + fall-through condition.
1.4319 + Change png_warning() to png_app_warning() in png_write_tRNS().
1.4320 + Rearranged the ARM-NEON optimizations: Isolated the machine specific code
1.4321 + to the hardware subdirectory and added comments to pngrutil.c so that
1.4322 + implementors of other optimizations know what to do.
1.4323 + Fixed cases of unquoted DESTDIR in Makefile.am
1.4324 + Rebuilt Makefile.in, etc., with autoconf-2.69 and automake-1.12.5.
1.4325 +
1.4326 +Version 1.6.0beta34 [December 19, 2012]
1.4327 + Cleaned up whitespace in the synopsis portion of the manpage "libpng.3"
1.4328 + Disassembled the version number in scripts/options.awk (necessary for
1.4329 + building on SunOs).
1.4330 +
1.4331 +Version 1.6.0beta35 [December 23, 2012]
1.4332 + Made default Zlib compression settings be configurable. This adds #defines to
1.4333 + pnglibconf.h to control the defaults.
1.4334 + Fixed Windows build issues, enabled ARM compilation. Various warnings issued
1.4335 + by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old
1.4336 + GCCs.) ARM support is enabled by default in zlib.props (unsupported by
1.4337 + Microsoft) and ARM compilation is made possible by deleting the check for
1.4338 + x86. The test programs cannot be run because they are not signed.
1.4339 +
1.4340 +Version 1.6.0beta36 [January 2, 2013]
1.4341 + Discontinued distributing libpng-1.x.x.tar.bz2.
1.4342 + Discontinued distributing libpng-1.7.0-1.6.0-diff.txt and similar.
1.4343 + Rebuilt configure with autoconf-2.69 (inadvertently not done in beta33)
1.4344 + Fixed 'make distcheck' on SUN OS - libpng.so was not being removed
1.4345 +
1.4346 +Version 1.6.0beta37 [January 10, 2013]
1.4347 + Fixed conceivable but difficult to repro overflow. Also added two test
1.4348 + programs to generate and test a PNG which should have the problem.
1.4349 +
1.4350 +Version 1.6.0beta39 [January 19, 2013]
1.4351 + Again corrected attempt at overflow detection in png_set_unknown_chunks().
1.4352 + Added overflow detection in png_set_sPLT() and png_set_text_2().
1.4353 +
1.4354 +Version 1.6.0beta40 [January 20, 2013]
1.4355 + Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs
1.4356 +
1.4357 +Version 1.6.0rc01 [January 26, 2013]
1.4358 + No changes.
1.4359 +
1.4360 +Version 1.6.0rc02 [February 4, 2013]
1.4361 + Added png_get_palette_max() function.
1.4362 +
1.4363 +Version 1.6.0rc03 [February 5, 2013]
1.4364 + Fixed the png_get_palette_max API.
1.4365 +
1.4366 +Version 1.6.0rc04 [February 7, 2013]
1.4367 + Turn serial tests back on (recently turned off by autotools upgrade).
1.4368 +
1.4369 +Version 1.6.0rc05 [February 8, 2013]
1.4370 + Update manual about png_get_palette_max().
1.4371 +
1.4372 +Version 1.6.0rc06 [February 9, 2013]
1.4373 + Fixed missing dependency in --prefix builds The intermediate
1.4374 + internal 'prefix.h' file can only be generated correctly after
1.4375 + pnglibconf.h, however the dependency was not in Makefile.am. The
1.4376 + symptoms are unpredictable depending on the order make chooses to
1.4377 + build pngprefix.h and pnglibconf.h, often the error goes unnoticed
1.4378 + because there is a system pnglibconf.h to use instead.
1.4379 +
1.4380 +Version 1.6.0rc07 [February 10, 2013]
1.4381 + Enclosed the new png_get_palette_max in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED
1.4382 + block, and revised pnglibconf.h and pnglibconf.h.prebuilt accordingly.
1.4383 +
1.4384 +Version 1.6.0rc08 [February 10, 2013]
1.4385 + Fix typo in png.h #ifdef
1.4386 +
1.4387 +Version 1.6.0 [February 14, 2013]
1.4388 + No changes.
1.4389 +
1.4390 +Version 1.6.1beta01 [February 16, 2013]
1.4391 + Made symbol prefixing work with the ARM neon optimizations. Also allow
1.4392 + pngpriv.h to be included for preprocessor definitions only, so it can
1.4393 + be used in non-C/C++ files. Back ported from libpng 1.7.
1.4394 + Made sRGB check numbers consistent.
1.4395 + Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug.
1.4396 + Removed cc -E workround, corrected png_get_palette_max API Tested on
1.4397 + SUN OS cc 5.9, which demonstrates the tokenization problem previously
1.4398 + avoided by using /lib/cpp. Since all .dfn output is now protected in
1.4399 + double quotes unless it is to be macro substituted the fix should
1.4400 + work everywhere.
1.4401 + Enabled parallel tests - back ported from libpng-1.7.
1.4402 + scripts/pnglibconf.dfa formatting improvements back ported from libpng17.
1.4403 + Fixed a race condition in the creation of the build 'scripts' directory
1.4404 + while building with a parallel make.
1.4405 + Use approved/supported Android method to check for NEON, use Linux/POSIX
1.4406 + 1003.1 API to check /proc/self/auxv avoiding buffer allocation and other
1.4407 + library calls (ported from libpng15).
1.4408 +
1.4409 +Version 1.6.1beta02 [February 19, 2013]
1.4410 + Use parentheses more consistently in "#if defined(MACRO)" tests.
1.4411 + Folded long lines.
1.4412 + Reenabled code to allow zero length PLTE chunks for MNG.
1.4413 +
1.4414 +Version 1.6.1beta03 [February 22, 2013]
1.4415 + Fixed ALIGNED_MEMORY support.
1.4416 + Allow run-time ARM NEON checking to be disabled. A new configure option:
1.4417 + --enable-arm-neon=always will stop the run-time checks. New checks
1.4418 + within arm/arm_init.c will cause the code not to be compiled unless
1.4419 + __ARM_NEON__ is set. This should make it fail safe (if someone asks
1.4420 + for it on then the build will fail if it can't be done.)
1.4421 + Updated the INSTALL document.
1.4422 +
1.4423 +Version 1.6.1beta04 [February 27, 2013]
1.4424 + Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES.
1.4425 + Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC.
1.4426 + Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble
1.4427 + with CRLF line endings.
1.4428 +
1.4429 +Version 1.6.1beta05 [March 1, 2013]
1.4430 + Avoid a possible memory leak in contrib/gregbook/readpng.c
1.4431 +
1.4432 +Version 1.6.1beta06 [March 4, 2013]
1.4433 + Better documentation of unknown handling API interactions.
1.4434 + Corrected Android builds and corrected libpng.vers with symbol
1.4435 + prefixing This adds an API to set optimization options externally,
1.4436 + providing an alternative and general solution for the non-portable
1.4437 + run-time tests used by the ARM Neon code. It also makes those tests
1.4438 + compile and link on Android.
1.4439 + The order of settings vs options in pnglibconf.h is reversed to allow
1.4440 + settings to depend on options and options can now set (or override) the
1.4441 + defaults for settings.
1.4442 +
1.4443 +Version 1.6.1beta07 [March 7, 2013]
1.4444 + Corrected simplified API default gamma for color-mapped output, added
1.4445 + a flag to change default. In 1.6.0 when the simplified API was used
1.4446 + to produce color-mapped output from an input image with no gamma
1.4447 + information the gamma assumed for the input could be different from
1.4448 + that assumed for non-color-mapped output. In particular 16-bit depth
1.4449 + input files were assumed to be sRGB encoded, whereas in the 'direct'
1.4450 + case they were assumed to have linear data. This was an error. The
1.4451 + fix makes the simplified API treat all input files the same way and
1.4452 + adds a new flag to the png_image::flags member to allow the
1.4453 + application/user to specify that 16-bit files contain sRGB data
1.4454 + rather than the default linear.
1.4455 + Fixed bugs in the pngpixel and makepng test programs.
1.4456 +
1.4457 +Version 1.6.1beta08 [March 7, 2013]
1.4458 + Fixed CMakelists.txt to allow building a single variant of the library
1.4459 + (Claudio Bley):
1.4460 + Introduced a PNG_LIB_TARGETS variable that lists all activated library
1.4461 + targets. It is an error if this variable ends up empty, ie. you have
1.4462 + to build at least one library variant.
1.4463 + Made the *_COPY targets only depend on library targets actually being build.
1.4464 + Use PNG_LIB_TARGETS to unify a code path.
1.4465 + Changed the CREATE_SYMLINK macro to expect the full path to a file as the
1.4466 + first argument. When symlinking the filename component of that path is
1.4467 + determined and used as the link target.
1.4468 + Use copy_if_different in the CREATE_SYMLINK macro.
1.4469 +
1.4470 +Version 1.6.1beta09 [March 13, 2013]
1.4471 + Eliminated two warnings from the Intel C compiler. The warnings are
1.4472 + technically valid, although a reasonable treatment of division would
1.4473 + show it to be incorrect.
1.4474 +
1.4475 +Version 1.6.1rc01 [March 21, 2013]
1.4476 + No changes.
1.4477 +
1.4478 +Version 1.6.1 [March 28, 2013]
1.4479 + No changes.
1.4480 +
1.4481 +Version 1.6.2beta01 [April 14, 2013]
1.4482 + Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling.
1.4483 + Fixed incorrect warning of excess deflate data. End condition - the
1.4484 + warning would be produced if the end of the deflate stream wasn't read
1.4485 + in the last row. The warning is harmless.
1.4486 + Corrected the test on user transform changes on read. It was in the
1.4487 + png_set of the transform function, but that doesn't matter unless the
1.4488 + transform function changes the rowbuf size, and that is only valid if
1.4489 + transform_info is called.
1.4490 + Corrected a misplaced closing bracket in contrib/libtests/pngvalid.c
1.4491 + (Flavio Medeiros).
1.4492 + Corrected length written to uncompressed iTXt chunks (Samuli Suominen).
1.4493 + Bug was introduced in libpng-1.6.0.
1.4494 +
1.4495 +Version 1.6.2rc01 [April 18, 2013]
1.4496 + Added contrib/tools/fixitxt.c, to repair the erroneous iTXt chunk length
1.4497 + written by libpng-1.6.0 and 1.6.1.
1.4498 + Disallow storing sRGB information when the sRGB is not supported.
1.4499 +
1.4500 +Version 1.6.2rc02 [April 18, 2013]
1.4501 + Merge pngtest.c with libpng-1.7.0
1.4502 +
1.4503 +Version 1.6.2rc03 [April 22, 2013]
1.4504 + Trivial spelling cleanup.
1.4505 +
1.4506 +Version 1.6.2rc04 and 1.6.2rc05 [omitted]
1.4507 +
1.4508 +Version 1.6.2rc06 [April 24, 2013]
1.4509 + Reverted to version 1.6.2rc03. Recent changes to arm/neon support
1.4510 + have been ported to libpng-1.7.0beta09 and will reappear in version
1.4511 + 1.6.3beta01.
1.4512 +
1.4513 +Version 1.6.2 [April 25, 2013]
1.4514 + No changes.
1.4515 +
1.4516 +Version 1.6.3beta01 [April 25, 2013]
1.4517 + Revised stack marking in arm/filter_neon.S and configure.ac.
1.4518 + Ensure that NEON filter stuff is completely disabled when switched 'off'.
1.4519 + Previously the ARM NEON specific files were still built if the option
1.4520 + was switched 'off' as opposed to being explicitly disabled.
1.4521 +
1.4522 +Version 1.6.3beta02 [April 26, 2013]
1.4523 + Test for 'arm*' not just 'arm' in the host_cpu configure variable.
1.4524 + Rebuilt the configure scripts.
1.4525 +
1.4526 +Version 1.6.3beta03 [April 30, 2013]
1.4527 + Expanded manual paragraph about writing private chunks, particularly
1.4528 + the need to call png_set_keep_unknown_chunks() when writing them.
1.4529 + Avoid dereferencing NULL pointer possibly returned from
1.4530 + png_create_write_struct() (Andrew Church).
1.4531 +
1.4532 +Version 1.6.3beta05 [May 9, 2013]
1.4533 + Calculate our own zlib windowBits when decoding rather than trusting the
1.4534 + CMF bytes in the PNG datastream.
1.4535 + Added an option to force maximum window size for inflating, which was
1.4536 + the behavior of libpng15 and earlier.
1.4537 + Added png-fix-itxt and png-fix-too-far-back to the built programs and
1.4538 + removed warnings from the source code and timepng that are revealed as
1.4539 + a result.
1.4540 + Detect wrong libpng versions linked to png-fix-too-far-back, which currently
1.4541 + only works with libpng versions that can be made to reliably fail when
1.4542 + the deflate data contains an out-of-window reference. This means only
1.4543 + 1.6 and later.
1.4544 + Fixed gnu issues: g++ needs a static_cast, gcc 4.4.7 has a broken warning
1.4545 + message which it is easier to work round than ignore.
1.4546 + Updated contrib/pngminus/pnm2png.c (Paul Stewart):
1.4547 + Check for EOF
1.4548 + Ignore "#" delimited comments in input file to pnm2png.c.
1.4549 + Fixed whitespace handling
1.4550 + Added a call to png_set_packing()
1.4551 + Initialize dimension values so if sscanf fails at least we have known
1.4552 + invalid values.
1.4553 + Attempt to detect configuration issues with png-fix-too-far-back, which
1.4554 + requires both the correct libpng and the correct zlib to function
1.4555 + correctly.
1.4556 + Check ZLIB_VERNUM for mismatches, enclose #error in quotes
1.4557 + Added information in the documentation about problems with and fixes for
1.4558 + the bad CRC and bad iTXt chunk situations.
1.4559 +
1.4560 +Version 1.6.3beta06 [May 12, 2013]
1.4561 + Allow contrib/pngminus/pnm2png.c to compile without WRITE_INVERT and
1.4562 + WRITE_PACK supported (writes error message that it can't read P1 or
1.4563 + P4 PBM files).
1.4564 + Improved png-fix-too-far-back usage message, added --suffix option.
1.4565 + Revised contrib/pngminim/*/makefile to generate pnglibconf.h with the
1.4566 + right zlib header files.
1.4567 + Separated CPPFLAGS and CFLAGS in contrib/pngminim/*/makefile
1.4568 +
1.4569 +Version 1.6.3beta07 [June 8, 2013]
1.4570 + Removed a redundant test in png_set_IHDR().
1.4571 + Added set(CMAKE_CONFIGURATION_TYPES ...) to CMakeLists.txt (Andrew Hundt)
1.4572 + Deleted set(CMAKE_BUILD_TYPE) block from CMakeLists.txt
1.4573 + Enclose the prototypes for the simplified write API in
1.4574 + #ifdef PNG_STDIO_SUPPORTED/#endif
1.4575 + Make ARM NEON support work at compile time (not just configure time).
1.4576 + This moves the test on __ARM_NEON__ into pngconf.h to avoid issues when
1.4577 + using a compiler that compiles for multiple architectures at one time.
1.4578 + Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from
1.4579 + pnglibconf.h, allowing more of the decisions to be made internally
1.4580 + (pngpriv.h) during the compile. Without this, symbol prefixing is broken
1.4581 + under certain circumstances on ARM platforms. Now only the API parts of
1.4582 + the optimizations ('check' vs 'api') are exposed in the public header files
1.4583 + except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the
1.4584 + decision about whether or not to use the optimizations.
1.4585 + Protect symbol prefixing against CC/CPPFLAGS/CFLAGS useage.
1.4586 + Previous iOS/Xcode fixes for the ARM NEON optimizations moved the test
1.4587 + on __ARM_NEON__ from configure time to compile time. This breaks symbol
1.4588 + prefixing because the definition of the special png_init_filter_functions
1.4589 + call was hidden at configure time if the relevant compiler arguments are
1.4590 + passed in CFLAGS as opposed to CC. This change attempts to avoid all
1.4591 + the confusion that would result by declaring the init function even when
1.4592 + it is not used, so that it will always get prefixed.
1.4593 +
1.4594 +Version 1.6.3beta08 [June 18, 2013]
1.4595 + Revised libpng.3 so that "doclifter" can process it.
1.4596 +
1.4597 +Version 1.6.3beta09 [June 27, 2013]
1.4598 + Revised example.c to illustrate use of PNG_DEFAULT_sRGB and PNG_GAMMA_MAC_18
1.4599 + as parameters for png_set_gamma(). These have been available since
1.4600 + libpng-1.5.4.
1.4601 + Renamed contrib/tools/png-fix-too-far-back.c to pngfix.c and revised it
1.4602 + to check all compressed chunks known to libpng.
1.4603 +
1.4604 +Version 1.6.3beta10 [July 5, 2013]
1.4605 + Updated documentation to show default behavior of benign errors correctly.
1.4606 + Only compile ARM code when PNG_READ_SUPPORTED is defined.
1.4607 + Fixed undefined behavior in contrib/tools/pngfix.c and added new strip
1.4608 + option. pngfix relied on undefined behavior and even a simple change from
1.4609 + gcc to g++ caused it to fail. The new strip option 'unsafe' has been
1.4610 + implemented and is the default if --max is given. Option names have
1.4611 + been clarified, with --strip=transform now stripping the bKGD chunk,
1.4612 + which was stripped previously with --strip=unused.
1.4613 + Added all documented chunk types to pngpriv.h
1.4614 + Unified pngfix.c source with libpng17.
1.4615 +
1.4616 +Version 1.6.3rc01 [July 11, 2013]
1.4617 + No changes.
1.4618 +
1.4619 +Version 1.6.3 [July 18, 2013]
1.4620 + Revised manual about changes in iTXt chunk handling made in libpng-1.6.0.
1.4621 + Added "/* SAFE */" comments in pngrutil.c and pngrtran.c where warnings
1.4622 + may be erroneously issued by code-checking applications.
1.4623 +
1.4624 +Version 1.6.4beta01 [August 21, 2013]
1.4625 + Added information about png_set_options() to the manual.
1.4626 + Delay calling png_init_filter_functions() until a row with nonzero filter
1.4627 + is found.
1.4628 +
1.4629 +Version 1.6.4beta02 [August 30, 2013]
1.4630 + Fixed inconsistent conditional compilation of png_chunk_unknown_handling()
1.4631 + prototype, definition, and usage. Made it depend on
1.4632 + PNG_HANDLE_AS_UNKNOWN_SUPPORTED everywhere.
1.4633 +
1.4634 +Version 1.6.4rc01 [September 5, 2013]
1.4635 + No changes.
1.4636 +
1.4637 +Version 1.6.4 [September 12, 2013]
1.4638 + No changes.
1.4639 +
1.4640 +Version 1.6.5 [September 14, 2013]
1.4641 + Removed two stray lines of code from arm/arm_init.c.
1.4642 +
1.4643 +Version 1.6.6 [September 16, 2013]
1.4644 + Removed two stray lines of code from arm/arm_init.c, again.
1.4645 +
1.4646 +Version 1.6.7beta01 [September 30, 2013]
1.4647 + Revised unknown chunk code to correct several bugs in the NO_SAVE_/NO_WRITE
1.4648 + combination
1.4649 + Allow HANDLE_AS_UNKNOWN to work when other options are configured off. Also
1.4650 + fixed the pngminim makefiles to work when $(MAKEFLAGS) contains stuff
1.4651 + which terminates the make options (as by default in recent versions of
1.4652 + Gentoo).
1.4653 + Avoid up-cast warnings in pngvalid.c. On ARM the alignment requirements of
1.4654 + png_modifier are greater than that of png_store and as a consequence
1.4655 + compilation of pngvalid.c results in a warning about increased alignment
1.4656 + requirements because of the bare cast to (png_modifier*). The code is safe,
1.4657 + because the pointer is known to point to a stack allocated png_modifier,
1.4658 + but this change avoids the warning.
1.4659 + Fixed default behavior of ARM_NEON_API. If the ARM NEON API option was
1.4660 + compiled without the CHECK option it defaulted to on, not off.
1.4661 + Check user callback behavior in pngunknown.c. Previous versions compiled
1.4662 + if SAVE_UNKNOWN was not available but did nothing since the callback
1.4663 + was never implemented.
1.4664 + Merged pngunknown.c with 1.7 version and back ported 1.7 improvements/fixes
1.4665 +
1.4666 +Version 1.6.7beta02 [October 12, 2013]
1.4667 + Made changes for compatibility with automake 1.14:
1.4668 + 1) Added the 'compile' program to the list of programs that must be cleaned
1.4669 + in autogen.sh
1.4670 + 2) Added 'subdir-objects' which causes .c files in sub-directories to be
1.4671 + compiled such that the corresponding .o files are also in the
1.4672 + sub-directory. This is because automake 1.14 warns that the
1.4673 + current behavior of compiling to the top level directory may be removed
1.4674 + in the future.
1.4675 + 3) Updated dependencies on pnglibconf.h to match the new .o locations and
1.4676 + added all the files in contrib/libtests and contrib/tools that depend
1.4677 + on pnglibconf.h
1.4678 + 4) Added 'BUILD_SOURCES = pnglibconf.h'; this is the automake recommended
1.4679 + way of handling the dependencies of sources that are machine generated;
1.4680 + unfortunately it only works if the user does 'make all' or 'make check',
1.4681 + so the dependencies (3) are still required.
1.4682 + Cleaned up (char*) casts of zlib messages. The latest version of the Intel C
1.4683 + compiler complains about casting a string literal as (char*), so copied the
1.4684 + treatment of z_const from the library code into pngfix.c
1.4685 + Simplified error message code in pngunknown. The simplification has the
1.4686 + useful side effect of avoiding a bogus warning generated by the latest
1.4687 + version of the Intel C compiler (it objects to
1.4688 + condition ? string-literal : string-literal).
1.4689 + Make autogen.sh work with automake 1.13 as well as 1.14. Do this by always
1.4690 + removing the 1.14 'compile' script but never checking for it.
1.4691 +
1.4692 +Version 1.6.7beta03 [October 19, 2013]
1.4693 + Added ARMv8 support (James Yu <james.yu at linaro.org>). Added file
1.4694 + arm/filter_neon_intrinsics.c; enable with -mfpu=neon.
1.4695 + Revised pngvalid to generate size images with as many filters as it can
1.4696 + manage, limited by the number of rows.
1.4697 + Cleaned up ARM NEON compilation handling. The tests are now in pngpriv.h
1.4698 + and detect the broken GCC compilers.
1.4699 +
1.4700 +Version 1.6.7beta04 [October 26, 2013]
1.4701 + Allow clang derived from older GCC versions to use ARM intrinsics. This
1.4702 + causes all clang builds that use -mfpu=neon to use the intrinsics code,
1.4703 + not the assembler code. This has only been tested on iOS 7. It may be
1.4704 + necessary to exclude some earlier clang versions but this seems unlikely.
1.4705 + Changed NEON implementation selection mechanism. This allows assembler
1.4706 + or intrinsics to be turned on at compile time during the build by defining
1.4707 + PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). This macro
1.4708 + is undefined by default and the build type is selected in pngpriv.h.
1.4709 +
1.4710 +Version 1.6.7rc01 [November 2, 2013]
1.4711 + No changes.
1.4712 +
1.4713 +Version 1.6.7rc02 [November 7, 2013]
1.4714 + Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char
1.4715 + checking macros take an unsigned char argument, not a signed char.
1.4716 +
1.4717 +Version 1.6.7 [November 14, 2013]
1.4718 + No changes.
1.4719 +
1.4720 +Version 1.6.8beta01 [November 24, 2013]
1.4721 + Moved prototype for png_handle_unknown() in pngpriv.h outside of
1.4722 + the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block.
1.4723 + Added "-Wall" to CFLAGS in contrib/pngminim/*/makefile
1.4724 + Conditionally compile some unused functions reported by -Wall in
1.4725 + pngminim.
1.4726 + Fixed 'minimal' builds. Various obviously useful minimal configurations
1.4727 + don't build because of missing contrib/libtests test programs and
1.4728 + overly complex dependencies in scripts/pnglibconf.dfa. This change
1.4729 + adds contrib/conftest/*.dfa files that can be used in automatic build
1.4730 + scripts to ensure that these configurations continue to build.
1.4731 + Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder.
1.4732 + Fixed pngvalid 'fail' function declaration on the Intel C Compiler.
1.4733 + This reverts to the previous 'static' implementation and works round
1.4734 + the 'unused static function' warning by using PNG_UNUSED().
1.4735 +
1.4736 +Version 1.6.8beta02 [November 30, 2013]
1.4737 + Removed or marked PNG_UNUSED some harmless "dead assignments" reported
1.4738 + by clang scan-build.
1.4739 + Changed tabs to 3 spaces in png_debug macros and changed '"%s"m'
1.4740 + to '"%s" m' to improve portability among compilers.
1.4741 + Changed png_free_default() to free() in pngtest.c
1.4742 +
1.4743 +Version 1.6.8rc01 [December 12, 2013]
1.4744 + Tidied up pngfix inits and fixed pngtest no-write builds.
1.4745 +
1.4746 +Version 1.6.8rc02 [December 14, 2013]
1.4747 + Handle zero-length PLTE chunk or NULL palette with png_error()
1.4748 + instead of png_chunk_report(), which by default issues a warning
1.4749 + rather than an error, leading to later reading from a NULL pointer
1.4750 + (png_ptr->palette) in png_do_expand_palette(). This is CVE-2013-6954
1.4751 + and VU#650142. Libpng-1.6.1 through 1.6.7 are vulnerable.
1.4752 + Libpng-1.6.0 and earlier do not have this bug.
1.4753 +
1.4754 +Version 1.6.8 [December 19, 2013]
1.4755 + No changes.
1.4756 +
1.4757 +Version 1.6.9beta01 [December 26, 2013]
1.4758 + Bookkeeping: Moved functions around (no changes). Moved transform
1.4759 + function definitions before the place where they are called so that
1.4760 + they can be made static. Move the intrapixel functions and the
1.4761 + grayscale palette builder out of the png?tran.c files. The latter
1.4762 + isn't a transform function and is no longer used internally, and the
1.4763 + former MNG specific functions are better placed in pngread/pngwrite.c
1.4764 + Made transform implementation functions static. This makes the internal
1.4765 + functions called by png_do_{read|write}_transformations static. On an
1.4766 + x86-64 DLL build (Gentoo Linux) this reduces the size of the text
1.4767 + segment of the DLL by 1208 bytes, about 0.6%. It also simplifies
1.4768 + maintenance by removing the declarations from pngpriv.h and allowing
1.4769 + easier changes to the internal interfaces.
1.4770 + Rebuilt configure scripts with automake-1.14.1 and autoconf-2.69
1.4771 + in the tar distributions.
1.4772 +
1.4773 +Version 1.6.9beta02 [January 1, 2014]
1.4774 + Added checks for libpng 1.5 to pngvalid.c. This supports the use of
1.4775 + this version of pngvalid in libpng 1.5
1.4776 + Merged with pngvalid.c from libpng-1.7 changes to create a single
1.4777 + pngvalid.c
1.4778 + Removed #error macro from contrib/tools/pngfix.c (Thomas Klausner).
1.4779 + Merged pngrio.c, pngtrans.c, pngwio.c, and pngerror.c with libpng-1.7.0
1.4780 + Merged libpng-1.7.0 changes to make no-interlace configurations work
1.4781 + with test programs.
1.4782 + Revised pngvalid.c to support libpng 1.5, which does not support the
1.4783 + PNG_MAXIMUM_INFLATE_WINDOW option, so #define it out when appropriate in
1.4784 + pngvalid.c
1.4785 + Allow unversioned links created on install to be disabled in configure.
1.4786 + In configure builds 'make install' changes/adds links like png.h
1.4787 + and libpng.a to point to the newly installed, versioned, files (e.g.
1.4788 + libpng17/png.h and libpng17.a). Three new configure options and some
1.4789 + rearrangement of Makefile.am allow creation of these links to be disabled.
1.4790 +
1.4791 +Version 1.6.9beta03 [January 10, 2014]
1.4792 + Removed potentially misleading warning from png_check_IHDR().
1.4793 +
1.4794 +Version 1.6.9beta04 [January 20, 2014]
1.4795 + Updated scripts/makefile.* to use CPPFLAGS (Cosmin).
1.4796 + Added clang attribute support (Cosmin).
1.4797 +
1.4798 +Version 1.6.9rc01 [January 28, 2014]
1.4799 + No changes.
1.4800 +
1.4801 +Version 1.6.9rc02 [January 30, 2014]
1.4802 + Quiet an uninitialized memory warning from VC2013 in png_get_png().
1.4803 +
1.4804 +Version 1.6.9 [February 6, 2014]
1.4805 +
1.4806 +Version 1.6.10beta01 [February 9, 2014]
1.4807 + Backported changes from libpng-1.7.0beta30 and beta31:
1.4808 + Fixed a large number of instances where PNGCBAPI was omitted from
1.4809 + function definitions.
1.4810 + Added pngimage test program for png_read_png() and png_write_png()
1.4811 + with two new test scripts.
1.4812 + Removed dependence on !PNG_READ_EXPAND_SUPPORTED for calling
1.4813 + png_set_packing() in png_read_png().
1.4814 + Fixed combination of ~alpha with shift. On read invert alpha, processing
1.4815 + occurred after shift processing, which causes the final values to be
1.4816 + outside the range that should be produced by the shift. Reversing the
1.4817 + order on read makes the two transforms work together correctly and mirrors
1.4818 + the order used on write.
1.4819 + Do not read invalid sBIT chunks. Previously libpng only checked sBIT
1.4820 + values on write, so a malicious PNG writer could therefore cause
1.4821 + the read code to return an invalid sBIT chunk, which might lead to
1.4822 + application errors or crashes. Such chunks are now skipped (with
1.4823 + chunk_benign_error).
1.4824 + Make png_read_png() and png_write_png() prototypes in png.h depend
1.4825 + upon PNG_READ_SUPPORTED and PNG_WRITE_SUPPORTED.
1.4826 + Support builds with unsupported PNG_TRANSFORM_* values. All of the
1.4827 + PNG_TRANSFORM_* values are always defined in png.h and, because they
1.4828 + are used for both read and write in some cases, it is not reliable
1.4829 + to #if out ones that are totally unsupported. This change adds error
1.4830 + detection in png_read_image() and png_write_image() to do a
1.4831 + png_app_error() if the app requests something that cannot be done
1.4832 + and it adds corresponding code to pngimage.c to handle such options
1.4833 + by not attempting to test them.
1.4834 +
1.4835 +Version 1.6.10beta02 [February 23, 2014]
1.4836 + Moved redefines of png_error(), png_warning(), png_chunk_error(),
1.4837 + and png_chunk_warning() from pngpriv.h to png.h to make them visible
1.4838 + to libpng-calling applications.
1.4839 + Moved OS dependent code from arm/arm_init.c, to allow the included
1.4840 + implementation of the ARM NEON discovery function to be set at
1.4841 + build-time and provide sample implementations from the current code in the
1.4842 + contrib/arm-neon subdirectory. The __linux__ code has also been changed to
1.4843 + compile and link on Android by using /proc/cpuinfo, and the old linux code
1.4844 + is in contrib/arm-neon/linux-auxv.c. The new code avoids POSIX and Linux
1.4845 + dependencies apart from opening /proc/cpuinfo and is C90 compliant.
1.4846 + Check for info_ptr == NULL early in png_read_end() so we don't need to
1.4847 + run all the png_handle_*() and depend on them to return if info_ptr == NULL.
1.4848 + This improves the performance of png_read_end(png_ptr, NULL) and makes
1.4849 + it more robust against future programming errors.
1.4850 + Check for __has_extension before using it in pngconf.h, to
1.4851 + support older Clang versions (Jeremy Sequoia).
1.4852 + Treat CRC error handling with png_set_crc_action(), instead of with
1.4853 + png_set_benign_errors(), which has been the case since libpng-1.6.0beta18.
1.4854 + Use a user warning handler in contrib/gregbook/readpng2.c instead of default,
1.4855 + so warnings will be put on stderr even if libpng has CONSOLE_IO disabled.
1.4856 + Added png_ptr->process_mode = PNG_READ_IDAT_MODE in png_push_read_chunk
1.4857 + after recognizing the IDAT chunk, which avoids an infinite loop while
1.4858 + reading a datastream whose first IDAT chunk is of zero-length.
1.4859 + This fixes CERT VU#684412 and CVE-2014-0333.
1.4860 + Don't recognize known sRGB profiles as sRGB if they have been hacked,
1.4861 + but don't reject them and don't issue a copyright violation warning.
1.4862 +
1.4863 +Version 1.6.10beta03 [February 25, 2014]
1.4864 + Moved some documentation from png.h to libpng.3 and libpng-manual.txt
1.4865 + Minor editing of contrib/arm-neon/README and contrib/examples/*.c
1.4866 +
1.4867 +Version 1.6.10rc01 [February 27, 2014]
1.4868 + Fixed typos in the manual and in scripts/pnglibconf.dfa (CFLAGS -> CPPFLAGS
1.4869 + and PNG_USR_CONFIG -> PNG_USER_CONFIG).
1.4870 +
1.4871 +Version 1.6.10rc02 [February 28, 2014]
1.4872 + Removed unreachable return statement after png_chunk_error()
1.4873 + in pngrutil.c
1.4874 +
1.4875 +Version 1.6.10rc03 [March 4, 2014]
1.4876 + Un-deprecated png_data_freer().
1.4877 +
1.4878 +Version 1.6.10 [March 6, 2014]
1.4879 +
1.4880 +Send comments/corrections/commendations to png-mng-implement at lists.sf.net
1.4881 +(subscription required; visit
1.4882 +https://lists.sourceforge.net/lists/listinfo/png-mng-implement
1.4883 +to subscribe)
1.4884 +or to glennrp at users.sourceforge.net
1.4885 +
1.4886 +Glenn R-P
1.4887 +#endif
