1CHANGES - changes for libpng 2 3version 0.1 [March 29, 1995] 4 initial work-in-progress release 5 6version 0.2 [April 1, 1995] 7 added reader into png.h 8 fixed small problems in stub file 9 10version 0.3 [April 8, 1995] 11 added pull reader 12 split up pngwrite.c to several files 13 added pnglib.txt 14 added example.c 15 cleaned up writer, adding a few new transformations 16 fixed some bugs in writer 17 interfaced with zlib 0.5 18 added K&R support 19 added check for 64 KB blocks for 16 bit machines 20 21version 0.4 [April 26, 1995] 22 cleaned up code and commented code 23 simplified time handling into png_time 24 created png_color_16 and png_color_8 to handle color needs 25 cleaned up color type defines 26 fixed various bugs 27 made various names more consistent 28 interfaced with zlib 0.71 29 cleaned up zTXt reader and writer (using zlib's Reset functions) 30 split transformations into pngrtran.c and pngwtran.c 31 32version 0.5 [April 30, 1995] 33 interfaced with zlib 0.8 34 fixed many reading and writing bugs 35 saved using 3 spaces instead of tabs 36 37version 0.6 [May 1, 1995] 38 first beta release 39 added png_large_malloc() and png_large_free() 40 added png_size_t 41 cleaned up some compiler warnings 42 added png_start_read_image() 43 44version 0.7 [June 24, 1995] 45 cleaned up lots of bugs 46 finished dithering and other stuff 47 added test program 48 changed name from pnglib to libpng 49 50version 0.71 [June 26, 1995] 51 changed pngtest.png for zlib 0.93 52 fixed error in libpng.txt and example.c 53 54version 0.8 [August 20, 1995] 55 cleaned up some bugs 56 added png_set_filler() 57 split up pngstub.c into pngmem.c, pngio.c, and pngerror.c 58 added #define's to remove unwanted code 59 moved png_info_init() to png.c 60 added old_size into png_realloc() 61 added functions to manually set filtering and compression info 62 changed compression parameters based on image type 63 optimized filter selection code 64 added version info 65 changed external functions passing floats to doubles (k&r problems?) 66 put all the configurable stuff in pngconf.h 67 enabled png_set_shift to work with paletted images on read 68 added png_read_update_info() - updates info structure with transformations 69 70Version 0.81 [August, 1995] 71 incorporated Tim Wegner's medium model code (thanks, Tim) 72 73Version 0.82 [September, 1995] 74 [unspecified changes] 75 76Version 0.85 [December, 1995] 77 added more medium model code (almost everything's a far) 78 added i/o, error, and memory callback functions 79 fixed some bugs (16-bit, 4-bit interlaced, etc.) 80 added first run progressive reader (barely tested) 81 82Version 0.86 [January, 1996] 83 fixed bugs 84 improved documentation 85 86Version 0.87 [January, 1996] 87 fixed medium model bugs 88 fixed other bugs introduced in 0.85 and 0.86 89 added some minor documentation 90 91Version 0.88 [January, 1996] 92 fixed progressive bugs 93 replaced tabs with spaces 94 cleaned up documentation 95 added callbacks for read/write and warning/error functions 96 97Version 0.89 [June 5, 1996] 98 Added new initialization API to make libpng work better with shared libs 99 we now have png_create_read_struct(), png_create_write_struct(), 100 png_create_info_struct(), png_destroy_read_struct(), and 101 png_destroy_write_struct() instead of the separate calls to 102 malloc and png_read_init(), png_info_init(), and png_write_init() 103 Changed warning/error callback functions to fix bug - this means you 104 should use the new initialization API if you were using the old 105 png_set_message_fn() calls, and that the old API no longer exists 106 so that people are aware that they need to change their code 107 Changed filter selection API to allow selection of multiple filters 108 since it didn't work in previous versions of libpng anyways 109 Optimized filter selection code 110 Fixed png_set_background() to allow using an arbitrary RGB color for 111 paletted images 112 Fixed gamma and background correction for paletted images, so 113 png_correct_palette is not needed unless you are correcting an 114 external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED 115 in pngconf.h) - if nobody uses this, it may disappear in the future. 116 Fixed bug with Borland 64K memory allocation (Alexander Lehmann) 117 Fixed bug in interlace handling (Smarasderagd, I think) 118 Added more error checking for writing and image to reduce invalid files 119 Separated read and write functions so that they won't both be linked 120 into a binary when only reading or writing functionality is used 121 New pngtest image also has interlacing and zTXt 122 Updated documentation to reflect new API 123 124Version 0.89c [June 17, 1996] 125 Bug fixes. 126 127Version 0.90 [January, 1997] 128 Made CRC errors/warnings on critical and ancillary chunks configurable 129 libpng will use the zlib CRC routines by (compile-time) default 130 Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner) 131 Added external C++ wrapper statements to png.h (Gilles Dauphin) 132 Allow PNG file to be read when some or all of file signature has already 133 been read from the beginning of the stream. ****This affects the size 134 of info_struct and invalidates all programs that use a shared libpng**** 135 Fixed png_filler() declarations 136 Fixed? background color conversions 137 Fixed order of error function pointers to match documentation 138 Current chunk name is now available in png_struct to reduce the number 139 of nearly identical error messages (will simplify multi-lingual 140 support when available) 141 Try to get ready for unknown-chunk callback functions: 142 - previously read critical chunks are flagged, so the chunk handling 143 routines can determine if the chunk is in the right place 144 - all chunk handling routines have the same prototypes, so we will 145 be able to handle all chunks via a callback mechanism 146 Try to fix Linux "setjmp" buffer size problems 147 Removed png_large_malloc, png_large_free, and png_realloc functions. 148 149Version 0.95 [March, 1997] 150 Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never 151 Fixed bug in PNG file signature compares when start != 0 152 Changed parameter type of png_set_filler(...filler...) from png_byte 153 to png_uint_32 154 Added test for MACOS to ensure that both math.h and fp.h are not #included 155 Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries) 156 Added "packswap" transformation, which changes the endianness of 157 packed-pixel bytes (Kevin Bracey) 158 Added "strip_alpha" transformation, which removes the alpha channel of 159 input images without using it (not necessarily a good idea) 160 Added "swap_alpha" transformation, which puts the alpha channel in front 161 of the color bytes instead of after 162 Removed all implicit variable tests which assume NULL == 0 (I think) 163 Changed several variables to "png_size_t" to show 16/32-bit limitations 164 Added new pCAL chunk read/write support 165 Added experimental filter selection weighting (Greg Roelofs) 166 Removed old png_set_rgbx() and png_set_xrgb() functions that have been 167 obsolete for about 2 years now (use png_set_filler() instead) 168 Added macros to read 16- and 32-bit ints directly from buffer, to be 169 used only on those systems that support it (namely PowerPC and 680x0) 170 With some testing, this may become the default for MACOS/PPC systems. 171 Only calculate CRC on data if we are going to use it 172 Added macros for zTXt compression type PNG_zTXt_COMPRESSION_??? 173 Added macros for simple libpng debugging output selectable at compile time 174 Removed PNG_READ_END_MODE in progressive reader (Smarasderagd) 175 More description of info_struct in libpng.txt and png.h 176 More instructions in example.c 177 More chunk types tested in pngtest.c 178 Renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be 179 png_set_<chunk>. We now have corresponding png_get_<chunk> 180 functions in pngget.c to get information in info_ptr. This isolates 181 the application from the internal organization of png_info_struct 182 (good for shared library implementations). 183 184Version 0.96 [May, 1997] 185 Fixed serious bug with < 8bpp images introduced in 0.95 186 Fixed 256-color transparency bug (Greg Roelofs) 187 Fixed up documentation (Greg Roelofs, Laszlo Nyul) 188 Fixed "error" in pngconf.h for Linux setjmp() behavior 189 Fixed DOS medium model support (Tim Wegner) 190 Fixed png_check_keyword() for case with error in static string text 191 Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul) 192 Added typecasts to quiet compiler errors 193 Added more debugging info 194 195Version 0.97 [January, 1998] 196 Removed PNG_USE_OWN_CRC capability 197 Relocated png_set_crc_action from pngrutil.c to pngrtran.c 198 Fixed typecasts of "new_key", etc. (Andreas Dilger) 199 Added RFC 1152 [sic] date support 200 Fixed bug in gamma handling of 4-bit grayscale 201 Added 2-bit grayscale gamma handling (Glenn R-P) 202 Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P) 203 Minor corrections in libpng.txt 204 Added simple sRGB support (Glenn R-P) 205 Easier conditional compiling, e.g., 206 define PNG_READ/WRITE_NOT_FULLY_SUPPORTED; 207 all configurable options can be selected from command-line instead 208 of having to edit pngconf.h (Glenn R-P) 209 Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P) 210 Added more conditions for png_do_background, to avoid changing 211 black pixels to background when a background is supplied and 212 no pixels are transparent 213 Repaired PNG_NO_STDIO behavior 214 Tested NODIV support and made it default behavior (Greg Roelofs) 215 Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler) 216 Regularized version numbering scheme and bumped shared-library major 217 version number to 2 to avoid problems with libpng 0.89 apps 218 (Greg Roelofs) 219 220Version 0.98 [January, 1998] 221 Cleaned up some typos in libpng.txt and in code documentation 222 Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler) 223 Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c 224 Changed recommendation about file_gamma for PC images to .51 from .45, 225 in example.c and libpng.txt, added comments to distinguish between 226 screen_gamma, viewing_gamma, and display_gamma. 227 Changed all references to RFC1152 to read RFC1123 and changed the 228 PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED 229 Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent) 230 Changed srgb_intent from png_byte to int to avoid compiler bugs 231 232Version 0.99 [January 30, 1998] 233 Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler) 234 Fixed a longstanding "packswap" bug in pngtrans.c 235 Fixed some inconsistencies in pngconf.h that prevented compiling with 236 PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined 237 Fixed some typos and made other minor rearrangement of libpng.txt (Andreas) 238 Changed recommendation about file_gamma for PC images to .50 from .51 in 239 example.c and libpng.txt, and changed file_gamma for sRGB images to .45 240 Added a number of functions to access information from the png structure 241 png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit) 242 Added TARGET_MACOS similar to zlib-1.0.8 243 Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined 244 Added type casting to all png_malloc() function calls 245 246Version 0.99a [January 31, 1998] 247 Added type casts and parentheses to all returns that return a value.(Tim W.) 248 249Version 0.99b [February 4, 1998] 250 Added type cast png_uint_32 on malloc function calls where needed. 251 Changed type of num_hist from png_uint_32 to int (same as num_palette). 252 Added checks for rowbytes overflow, in case png_size_t is less than 32 bits. 253 Renamed makefile.elf to makefile.lnx. 254 255Version 0.99c [February 7, 1998] 256 More type casting. Removed erroneous overflow test in pngmem.c. 257 Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes. 258 Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5. 259 260Version 0.99d [February 11, 1998] 261 Renamed "far_to_near()" "png_far_to_near()" 262 Revised libpng.3 263 Version 99c "buffered" operations didn't work as intended. Replaced them 264 with png_memcpy_check() and png_memset_check(). 265 Added many "if (png_ptr == NULL) return" to quell compiler warnings about 266 unused png_ptr, mostly in pngget.c and pngset.c. 267 Check for overlength tRNS chunk present when indexed-color PLTE is read. 268 Cleaned up spelling errors in libpng.3/libpng.txt 269 Corrected a problem with png_get_tRNS() which returned undefined trans array 270 271Version 0.99e [February 28, 1998] 272 Corrected png_get_tRNS() again. 273 Add parentheses for easier reading of pngget.c, fixed "||" should be "&&". 274 Touched up example.c to make more of it compileable, although the entire 275 file still can't be compiled (Willem van Schaik) 276 Fixed a bug in png_do_shift() (Bryan Tsai) 277 Added a space in png.h prototype for png_write_chunk_start() 278 Replaced pngtest.png with one created with zlib 1.1.1 279 Changed pngtest to report PASS even when file size is different (Jean-loup G.) 280 Corrected some logic errors in png_do_invert_alpha() (Chris Patterson) 281 282Version 0.99f [March 5, 1998] 283 Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey) 284 Moved makefiles into a "scripts" directory, and added INSTALL instruction file 285 Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok) 286 Added pointers to "note on libpng versions" in makefile.lnx and README 287 Added row callback feature when reading and writing nonprogressive rows 288 and added a test of this feature in pngtest.c 289 Added user transform callbacks, with test of the feature in pngtest.c 290 291Version 0.99g [March 6, 1998, morning] 292 Minor changes to pngtest.c to suppress compiler warnings. 293 Removed "beta" language from documentation. 294 295Version 0.99h [March 6, 1998, evening] 296 Minor changes to previous minor changes to pngtest.c 297 Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED 298 and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro 299 Added user transform capability 300 301Version 1.00 [March 7, 1998] 302 Changed several typedefs in pngrutil.c 303 Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik) 304 Replaced "while(1)" with "for(;;)" 305 Added PNGARG() to prototypes in pngtest.c and removed some prototypes 306 Updated some of the makefiles (Tom Lane) 307 Changed some typedefs (s_start, etc.) in pngrutil.c 308 Fixed dimensions of "short_months" array in pngwrite.c 309 Replaced ansi2knr.c with the one from jpeg-v6 310 311Version 1.0.0 [March 8, 1998] 312 Changed name from 1.00 to 1.0.0 (Adam Costello) 313 Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert) 314 315Version 1.0.0a [March 9, 1998] 316 Fixed three bugs in pngrtran.c to make gamma+background handling consistent 317 (Greg Roelofs) 318 Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz 319 for major, minor, and bugfix releases. This is 10001. (Adam Costello, 320 Tom Lane) 321 Make months range from 1-12 in png_convert_to_rfc1123 322 323Version 1.0.0b [March 13, 1998] 324 Quieted compiler complaints about two empty "for" loops in pngrutil.c 325 Minor changes to makefile.s2x 326 Removed #ifdef/#endif around a png_free() in pngread.c 327 328Version 1.0.1 [March 14, 1998] 329 Changed makefile.s2x to reduce security risk of using a relative pathname 330 Fixed some typos in the documentation (Greg). 331 Fixed a problem with value of "channels" returned by png_read_update_info() 332 333Version 1.0.1a [April 21, 1998] 334 Optimized Paeth calculations by replacing abs() function calls with intrinsics 335 plus other loop optimizations. Improves avg decoding speed by about 20%. 336 Commented out i386istic "align" compiler flags in makefile.lnx. 337 Reduced the default warning level in some makefiles, to make them consistent. 338 Removed references to IJG and JPEG in the ansi2knr.c copyright statement. 339 Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation. 340 Added grayscale and 16-bit capability to png_do_read_filler(). 341 Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes 342 too large when writing an image with bit_depth < 8 (Bob Dellaca). 343 Corrected some bugs in the experimental weighted filtering heuristics. 344 Moved a misplaced pngrutil code block that truncates tRNS if it has more 345 than num_palette entries -- test was done before num_palette was defined. 346 Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins). 347 Changed compiler flags in makefile.wat for better optimization 348 (Pawel Mrochen). 349 350Version 1.0.1b [May 2, 1998] 351 Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg). 352 Relocated the png_composite macros from pngrtran.c to png.h (Greg). 353 Added makefile.sco (contributed by Mike Hopkirk). 354 Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a. 355 Fixed a bug in pngrtran.c that would set channels=5 under some circumstances. 356 More work on the Paeth-filtering, achieving imperceptible speedup 357 (A Kleinert). 358 More work on loop optimization which may help when compiled with C++ 359 compilers. 360 Added warnings when people try to use transforms they've defined out. 361 Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran. 362 Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg) 363 364Version 1.0.1c [May 11, 1998] 365 Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for 366 filler bytes should have been 0xff instead of 0xf. 367 Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images. 368 Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED 369 out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h 370 Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED, 371 for consistency, in pngconf.h 372 Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier 373 to remove unwanted capabilities via the compile line 374 Made some corrections to grammar (which, it's) in documentation (Greg). 375 Corrected example.c, use of row_pointers in png_write_image(). 376 377Version 1.0.1d [May 24, 1998] 378 Corrected several statements that used side effects illegally in pngrutil.c 379 and pngtrans.c, that were introduced in version 1.0.1b 380 Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert) 381 More corrections to example.c, use of row_pointers in png_write_image() 382 and png_read_rows(). 383 Added pngdll.mak and pngdef.pas to scripts directory, contributed by 384 Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5 385 Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.) 386 Changed several loops from count-down to count-up, for consistency. 387 388Version 1.0.1e [June 6, 1998] 389 Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and 390 added warnings when people try to set png_read_fn and png_write_fn in 391 the same structure. 392 Added a test such that png_do_gamma will be done when num_trans==0 393 for truecolor images that have defined a background. This corrects an 394 error that was introduced in libpng-0.90 that can cause gamma processing 395 to be skipped. 396 Added tests in png.h to include "trans" and "trans_values" in structures 397 when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined. 398 Add png_free(png_ptr->time_buffer) in png_destroy_read_struct() 399 Moved png_convert_to_rfc_1123() from pngwrite.c to png.c 400 Added capability for user-provided malloc_fn() and free_fn() functions, 401 and revised pngtest.c to demonstrate their use, replacing the 402 PNGTEST_DEBUG_MEM feature. 403 Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner). 404 405Version 1.0.2 [June 14, 1998] 406 Fixed two bugs in makefile.bor . 407 408Version 1.0.2a [December 30, 1998] 409 Replaced and extended code that was removed from png_set_filler() in 1.0.1a. 410 Fixed a bug in png_do_filler() that made it fail to write filler bytes in 411 the left-most pixel of each row (Kevin Bracey). 412 Changed "static pngcharp tIME_string" to "static char tIME_string[30]" 413 in pngtest.c (Duncan Simpson). 414 Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk 415 even when no tIME chunk was present in the source file. 416 Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit. 417 Fixed a problem in png_read_push_finish_row(), which would not skip some 418 passes that it should skip, for images that are less than 3 pixels high. 419 Interchanged the order of calls to png_do_swap() and png_do_shift() 420 in pngwtran.c (John Cromer). 421 Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h . 422 Changed "bad adaptive filter type" from error to warning in pngrutil.c . 423 Fixed a documentation error about default filtering with 8-bit indexed-color. 424 Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO 425 (L. Peter Deutsch). 426 Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions. 427 Added png_get_copyright() and png_get_header_version() functions. 428 Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c 429 Added information about debugging in libpng.txt and libpng.3 . 430 Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and 431 makefile.sco. 432 Removed lines after Dynamic Dependencies" in makefile.aco . 433 Revised makefile.dec to make a shared library (Jeremie Petit). 434 Removed trailing blanks from all files. 435 436Version 1.0.2a [January 6, 1999] 437 Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h 438 Added "if" tests to silence complaints about unused png_ptr in png.h and png.c 439 Changed "check_if_png" function in example.c to return true (nonzero) if PNG. 440 Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig() 441 which is obsolete. 442 443Version 1.0.3 [January 14, 1999] 444 Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice) 445 Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO. 446 447Version 1.0.3a [August 12, 1999] 448 Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning 449 if an attempt is made to read an interlaced image when it's not supported. 450 Added check if png_ptr->trans is defined before freeing it in pngread.c 451 Modified the Y2K statement to include versions back to version 0.71 452 Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c 453 Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments) 454 Replaced leading blanks with tab characters in makefile.hux 455 Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents. 456 Changed (float)red and (float)green to (double)red, (double)green 457 in png_set_rgb_to_gray() to avoid "promotion" problems in AIX. 458 Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey). 459 Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt). 460 Updated documentation to refer to the PNG-1.2 specification. 461 Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c 462 in makefile.knr, INSTALL, and README (L. Peter Deutsch) 463 Fixed bugs in calculation of the length of rowbytes when adding alpha 464 channels to 16-bit images, in pngrtran.c (Chris Nokleberg) 465 Added function png_set_user_transform_info() to store user_transform_ptr, 466 user_depth, and user_channels into the png_struct, and a function 467 png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg) 468 Added function png_set_empty_plte_permitted() to make libpng useable 469 in MNG applications. 470 Corrected the typedef for png_free_ptr in png.h (Jesse Jones). 471 Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be 472 consistent with PNG-1.2, and allow variance of 500 before complaining. 473 Added assembler code contributed by Intel in file pngvcrd.c and modified 474 makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, 475 Gilles Vollant) 476 Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy. 477 Added some aliases for png_set_expand() in pngrtran.c, namely 478 png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS() 479 (Greg Roelofs, in "PNG: The Definitive Guide"). 480 Added makefile.beo for BEOS on X86, contributed by Sander Stok. 481 482Version 1.0.3b [August 26, 1999] 483 Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h 484 Changed leading blanks to tabs in all makefiles. 485 Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code. 486 Made alternate versions of png_set_expand() in pngrtran.c, namely 487 png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha 488 (Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases. 489 Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h 490 Revised calculation of num_blocks in pngmem.c to avoid a potentially 491 negative shift distance, whose results are undefined in the C language. 492 Added a check in pngset.c to prevent writing multiple tIME chunks. 493 Added a check in pngwrite.c to detect invalid small window_bits sizes. 494 495Version 1.0.3d [September 4, 1999] 496 Fixed type casting of igamma in pngrutil.c 497 Added new png_expand functions to scripts/pngdef.pas and pngos2.def 498 Added a demo read_user_transform_fn that examines the row filters in pngtest.c 499 500Version 1.0.4 [September 24, 1999, not distributed publicly] 501 Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined 502 Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h 503 Made several minor corrections to pngtest.c 504 Renamed the makefiles with longer but more user friendly extensions. 505 Copied the PNG copyright and license to a separate LICENSE file. 506 Revised documentation, png.h, and example.c to remove reference to 507 "viewing_gamma" which no longer appears in the PNG specification. 508 Revised pngvcrd.c to use MMX code for interlacing only on the final pass. 509 Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a 510 Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX 511 assembler code) and makefile.vcwin32 (doesn't). 512 Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING) 513 Added a copy of pngnow.png to the distribution. 514 515Version 1.0.4a [September 25, 1999] 516 Increase max_pixel_depth in pngrutil.c if a user transform needs it. 517 Changed several division operations to right-shifts in pngvcrd.c 518 519Version 1.0.4b [September 30, 1999] 520 Added parentheses in line 3732 of pngvcrd.c 521 Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1 522 523Version 1.0.4c [October 1, 1999] 524 Added a "png_check_version" function in png.c and pngtest.c that will generate 525 a helpful compiler error if an old png.h is found in the search path. 526 Changed type of png_user_transform_depth|channels from int to png_byte. 527 Added "Libpng is OSI Certified Open Source Software" statement to png.h 528 529Version 1.0.4d [October 6, 1999] 530 Changed 0.45 to 0.45455 in png_set_sRGB() 531 Removed unused PLTE entries from pngnow.png 532 Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly. 533 534Version 1.0.4e [October 10, 1999] 535 Fixed sign error in pngvcrd.c (Greg Roelofs) 536 Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P) 537 538Version 1.0.4f [October 15, 1999] 539 Surrounded example.c code with #if 0 .. #endif to prevent people from 540 inadvertently trying to compile it. 541 Changed png_get_header_version() from a function to a macro in png.h 542 Added type casting mostly in pngrtran.c and pngwtran.c 543 Removed some pointless "ptr = NULL" in pngmem.c 544 Added a "contrib" directory containing the source code from Greg's book. 545 546Version 1.0.5 [October 15, 1999] 547 Minor editing of the INSTALL and README files. 548 549Version 1.0.5a [October 23, 1999] 550 Added contrib/pngsuite and contrib/pngminus (Willem van Schaik) 551 Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans) 552 Further optimization and bugfix of pngvcrd.c 553 Revised pngset.c so that it does not allocate or free memory in the user's 554 text_ptr structure. Instead, it makes its own copy. 555 Created separate write_end_info_struct in pngtest.c for a more severe test. 556 Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak. 557 558Version 1.0.5b [November 23, 1999] 559 Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and 560 PNG_FLAG_WROTE_tIME from flags to mode. 561 Added png_write_info_before_PLTE() function. 562 Fixed some typecasting in contrib/gregbook/*.c 563 Updated scripts/makevms.com and added makevms.com to contrib/gregbook 564 and contrib/pngminus (Martin Zinser) 565 566Version 1.0.5c [November 26, 1999] 567 Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr. 568 Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to 569 accommodate making DLL's: Moved usr_png_ver from global variable to function 570 png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and 571 eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays 572 into pngtypes.h. Eliminated use of global png_pass arrays. Declared the 573 png_CHNK and png_pass arrays to be "const". Made the global arrays 574 available to applications (although none are used in libpng itself) when 575 PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined. 576 Removed some extraneous "-I" from contrib/pngminus/makefile.std 577 Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2. 578 Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3 579 580Version 1.0.5d [November 29, 1999] 581 Add type cast (png_const_charp) two places in png.c 582 Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays. 583 Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available 584 to applications a macro "PNG_USE_LOCAL_ARRAYS". 585 comment out (with #ifdef) all the new declarations when 586 PNG_USE_GLOBAL_ARRAYS is defined. 587 Added PNG_EXPORT_VAR macro to accommodate making DLL's. 588 589Version 1.0.5e [November 30, 1999] 590 Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text 591 structure; refactored the inflate/deflate support to make adding new chunks 592 with trailing compressed parts easier in the future, and added new functions 593 png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP, 594 png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond). 595 NOTE: Applications that write text chunks MUST define png_text->lang 596 before calling png_set_text(). It must be set to NULL if you want to 597 write tEXt or zTXt chunks. If you want your application to be able to 598 run with older versions of libpng, use 599 600 #ifdef PNG_iTXt_SUPPORTED 601 png_text[i].lang = NULL; 602 #endif 603 604 Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned 605 offsets (Eric S. Raymond). 606 Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into 607 PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED 608 macros, leaving the separate macros also available. 609 Removed comments on #endifs at the end of many short, non-nested #if-blocks. 610 611Version 1.0.5f [December 6, 1999] 612 Changed makefile.solaris to issue a warning about potential problems when 613 the ucb "ld" is in the path ahead of the ccs "ld". 614 Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3. 615 Added sCAL chunk support (Eric S. Raymond). 616 617Version 1.0.5g [December 7, 1999] 618 Fixed "png_free_spallettes" typo in png.h 619 Added code to handle new chunks in pngpread.c 620 Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block 621 Added "translated_key" to png_text structure and png_write_iTXt(). 622 Added code in pngwrite.c to work around a newly discovered zlib bug. 623 624Version 1.0.5h [December 10, 1999] 625 NOTE: regarding the note for version 1.0.5e, the following must also 626 be included in your code: 627 png_text[i].translated_key = NULL; 628 Unknown chunk handling is now supported. 629 Option to eliminate all floating point support was added. Some new 630 fixed-point functions such as png_set_gAMA_fixed() were added. 631 Expanded tabs and removed trailing blanks in source files. 632 633Version 1.0.5i [December 13, 1999] 634 Added some type casts to silence compiler warnings. 635 Renamed "png_free_spalette" to "png_free_spalettes" for consistency. 636 Removed leading blanks from a #define in pngvcrd.c 637 Added some parameters to the new png_set_keep_unknown_chunks() function. 638 Added a test for up->location != 0 in the first instance of writing 639 unknown chunks in pngwrite.c 640 Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to 641 prevent recursion. 642 Added png_free_hIST() function. 643 Various patches to fix bugs in the sCAL and integer cHRM processing, 644 and to add some convenience macros for use with sCAL. 645 646Version 1.0.5j [December 21, 1999] 647 Changed "unit" parameter of png_write_sCAL from png_byte to int, to work 648 around buggy compilers. 649 Added new type "png_fixed_point" for integers that hold float*100000 values 650 Restored backward compatibility of tEXt/zTXt chunk processing: 651 Restored the first four members of png_text to the same order as v.1.0.5d. 652 Added members "lang_key" and "itxt_length" to png_text struct. Set 653 text_length=0 when "text" contains iTXt data. Use the "compression" 654 member to distinguish among tEXt/zTXt/iTXt types. Added 655 PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros. 656 The "Note" above, about backward incompatibility of libpng-1.0.5e, no 657 longer applies. 658 Fixed png_read|write_iTXt() to read|write parameters in the right order, 659 and to write the iTXt chunk after IDAT if it appears in the end_ptr. 660 Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs) 661 Reversed the order of trying to write floating-point and fixed-point gAMA. 662 663Version 1.0.5k [December 27, 1999] 664 Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))" 665 Added png_handle_as_unknown() function (Glenn) 666 Added png_free_chunk_list() function and chunk_list and num_chunk_list members 667 of png_ptr. 668 Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE. 669 Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings 670 about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored) 671 Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR). 672 Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is. 673 Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP(). 674 675Version 1.0.5l [January 1, 2000] 676 Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr() 677 for setting a callback function to handle unknown chunks and for 678 retrieving the associated user pointer (Glenn). 679 680Version 1.0.5m [January 7, 2000] 681 Added high-level functions png_read_png(), png_write_png(), png_free_pixels(). 682 683Version 1.0.5n [January 9, 2000] 684 Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its 685 own memory for info_ptr->palette. This makes it safe for the calling 686 application to free its copy of the palette any time after it calls 687 png_set_PLTE(). 688 689Version 1.0.5o [January 20, 2000] 690 Cosmetic changes only (removed some trailing blanks and TABs) 691 692Version 1.0.5p [January 31, 2000] 693 Renamed pngdll.mak to makefile.bd32 694 Cosmetic changes in pngtest.c 695 696Version 1.0.5q [February 5, 2000] 697 Relocated the makefile.solaris warning about PATH problems. 698 Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg) 699 Revised makefile.gcmmx 700 Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros 701 702Version 1.0.5r [February 7, 2000] 703 Removed superfluous prototype for png_get_itxt from png.h 704 Fixed a bug in pngrtran.c that improperly expanded the background color. 705 Return *num_text=0 from png_get_text() when appropriate, and fix documentation 706 of png_get_text() in libpng.txt/libpng.3. 707 708Version 1.0.5s [February 18, 2000] 709 Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the 710 new error handler that's planned for the next libpng release, and changed 711 example.c, pngtest.c, and contrib programs to use this macro. 712 Revised some of the DLL-export macros in pngconf.h (Greg Roelofs) 713 Fixed a bug in png_read_png() that caused it to fail to expand some images 714 that it should have expanded. 715 Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions 716 in pngget.c 717 Changed the allocation of palette, history, and trans arrays back to 718 the version 1.0.5 method (linking instead of copying) which restores 719 backward compatibility with version 1.0.5. Added some remarks about 720 that in example.c. Added "free_me" member to info_ptr and png_ptr 721 and added png_free_data() function. 722 Updated makefile.linux and makefile.gccmmx to make directories conditionally. 723 Made cosmetic changes to pngasmrd.h 724 Added png_set_rows() and png_get_rows(), for use with png_read|write_png(). 725 Modified png_read_png() to allocate info_ptr->row_pointers only if it 726 hasn't already been allocated. 727 728Version 1.0.5t [March 4, 2000] 729 Changed png_jmp_env() migration aiding macro to png_jmpbuf(). 730 Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c 731 Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when 732 PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b 733 Files in contrib/gregbook were revised to use png_jmpbuf() and to select 734 a 24-bit visual if one is available, and to allow abbreviated options. 735 Files in contrib/pngminus were revised to use the png_jmpbuf() macro. 736 Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s 737 738Version 1.0.5u [March 5, 2000] 739 Simplified the code that detects old png.h in png.c and pngtest.c 740 Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp) 741 Increased precision of rgb_to_gray calculations from 8 to 15 bits and 742 added png_set_rgb_to_gray_fixed() function. 743 Added makefile.bc32 (32-bit Borland C++, C mode) 744 745Version 1.0.5v [March 11, 2000] 746 Added some parentheses to the png_jmpbuf macro definition. 747 Updated references to the zlib home page, which has moved to freesoftware.com. 748 Corrected bugs in documentation regarding png_read_row() and png_write_row(). 749 Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt. 750 Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3, 751 revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin) 752 753Version 1.0.6 [March 20, 2000] 754 Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c 755 Added makefile.sggcc (SGI IRIX with gcc) 756 757Version 1.0.6d [April 7, 2000] 758 Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO 759 Added data_length parameter to png_decompress_chunk() function 760 Revised documentation to remove reference to abandoned png_free_chnk functions 761 Fixed an error in png_rgb_to_gray_fixed() 762 Revised example.c, usage of png_destroy_write_struct(). 763 Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file 764 Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c 765 Simplify png_sig_bytes() function to remove use of non-ISO-C strdup(). 766 767Version 1.0.6e [April 9, 2000] 768 Added png_data_freer() function. 769 In the code that checks for over-length tRNS chunks, added check of 770 info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann) 771 Minor revisions of libpng.txt/libpng.3. 772 Check for existing data and free it if the free_me flag is set, in png_set_*() 773 and png_handle_*(). 774 Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED 775 is defined. 776 Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c 777 and mentioned the purposes of the two macros in libpng.txt/libpng.3. 778 779Version 1.0.6f [April 14, 2000] 780 Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data. 781 Add checks in png_set_text() for NULL members of the input text structure. 782 Revised libpng.txt/libpng.3. 783 Removed superfluous prototype for png_set_iTXt from png.h 784 Removed "else" from pngread.c, after png_error(), and changed "0" to "length". 785 Changed several png_errors about malformed ancillary chunks to png_warnings. 786 787Version 1.0.6g [April 24, 2000] 788 Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined. 789 Relocated paragraph about png_set_background() in libpng.3/libpng.txt 790 and other revisions (Matthias Benckmann) 791 Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and 792 png_ptr members to restore binary compatibility with libpng-1.0.5 793 (breaks compatibility with libpng-1.0.6). 794 795Version 1.0.6h [April 24, 2000] 796 Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds 797 libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h) 798 This is a temporary change for test purposes. 799 800Version 1.0.6i [May 2, 2000] 801 Rearranged some members at the end of png_info and png_struct, to put 802 unknown_chunks_num and free_me within the original size of the png_structs 803 and free_me, png_read_user_fn, and png_free_fn within the original png_info, 804 because some old applications allocate the structs directly instead of 805 using png_create_*(). 806 Added documentation of user memory functions in libpng.txt/libpng.3 807 Modified png_read_png so that it will use user_allocated row_pointers 808 if present, unless free_me directs that it be freed, and added description 809 of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3. 810 Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version 811 1.00) members of png_struct and png_info, to regain binary compatibility 812 when you define this macro. Capabilities lost in this event 813 are user transforms (new in version 1.0.0),the user transform pointer 814 (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT, 815 the high-level interface, and unknown chunks support (all new in 1.0.6). 816 This was necessary because of old applications that allocate the structs 817 directly as authors were instructed to do in libpng-0.88 and earlier, 818 instead of using png_create_*(). 819 Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which 820 can be used to detect codes that directly allocate the structs, and 821 code to check these modes in png_read_init() and png_write_init() and 822 generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED 823 was not defined. 824 Added makefile.intel and updated makefile.watcom (Pawel Mrochen) 825 826Version 1.0.6j [May 3, 2000] 827 Overloaded png_read_init() and png_write_init() with macros that convert 828 calls to png_read_init_2() or png_write_init_2() that check the version 829 and structure sizes. 830 831Version 1.0.7beta11 [May 7, 2000] 832 Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes 833 which are no longer used. 834 Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is 835 defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXt_SUPPORTED 836 is defined. 837 Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory 838 overrun when old applications fill the info_ptr->text structure directly. 839 Added PNGAPI macro, and added it to the definitions of all exported functions. 840 Relocated version macro definitions ahead of the includes of zlib.h and 841 pngconf.h in png.h. 842 843Version 1.0.7beta12 [May 12, 2000] 844 Revised pngset.c to avoid a problem with expanding the png_debug macro. 845 Deleted some extraneous defines from pngconf.h 846 Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined. 847 Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined. 848 Added png_access_version_number() function. 849 Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data(). 850 Expanded libpng.3/libpng.txt information about png_data_freer(). 851 852Version 1.0.7beta14 [May 17, 2000] (beta13 was not published) 853 Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as 854 warnings instead of errors, as pngrutil.c does. 855 Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png() 856 will actually write IDATs. 857 Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32. 858 Make png_free_data() ignore its final parameter except when freeing data 859 that can have multiple instances (text, sPLT, unknowns). 860 Fixed a new bug in png_set_rows(). 861 Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5. 862 Added png_set_invalid() function. 863 Fixed incorrect illustrations of png_destroy_write_struct() in example.c. 864 865Version 1.0.7beta15 [May 30, 2000] 866 Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce 867 fewer error messages. 868 Rearranged checks for Z_OK to check the most likely path first in pngpread.c 869 and pngwutil.c. 870 Added checks in pngtest.c for png_create_*() returning NULL, and mentioned 871 in libpng.txt/libpng.3 the need for applications to check this. 872 Changed names of png_default_*() functions in pngtest to pngtest_*(). 873 Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32. 874 Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c 875 Set each pointer to NULL after freeing it in png_free_data(). 876 Worked around a problem in pngconf.h; AIX's strings.h defines an "index" 877 macro that conflicts with libpng's png_color_16.index. (Dimitri 878 Papadapoulos) 879 Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux). 880 881Version 1.0.7beta16 [June 4, 2000] 882 Revised the workaround of AIX string.h "index" bug. 883 Added a check for overlength PLTE chunk in pngrutil.c. 884 Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer 885 indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler. 886 Added a warning in png_decompress_chunk() when it runs out of data, e.g. 887 when it tries to read an erroneous PhotoShop iCCP chunk. 888 Added PNG_USE_DLL macro. 889 Revised the copyright/disclaimer/license notice. 890 Added contrib/msvctest directory 891 892Version 1.0.7rc1 [June 9, 2000] 893 Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200) 894 Added contrib/visupng directory (Willem van Schaik) 895 896Version 1.0.7beta18 [June 23, 2000] 897 Revised PNGAPI definition, and pngvcrd.c to work with __GCC__ 898 and do not redefine PNGAPI if it is passed in via a compiler directive. 899 Revised visupng/PngFile.c to remove returns from within the Try block. 900 Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros. 901 Updated contrib/visupng/cexcept.h to version 1.0.0. 902 Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks. 903 904Version 1.0.7rc2 [June 28, 2000] 905 Updated license to include disclaimers required by UCITA. 906 Fixed "DJBPP" typo in pnggccrd.c introduced in beta18. 907 908Version 1.0.7 [July 1, 2000] 909 Revised the definition of "trans_values" in libpng.3/libpng.txt 910 911Version 1.0.8beta1 [July 8, 2000] 912 Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks. 913 Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and 914 pngwutil.c. 915 Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h. 916 Removed unused "#include <assert.h>" from png.c 917 Added WindowsCE support. 918 Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment. 919 920Version 1.0.8beta2 [July 10, 2000] 921 Added project files to the wince directory and made further revisions 922 of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE. 923 924Version 1.0.8beta3 [July 11, 2000] 925 Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS() 926 for indexed-color input files to avoid potential double-freeing trans array 927 under some unusual conditions; problem was introduced in version 1.0.6f. 928 Further revisions to pngtest.c and files in the wince subdirectory. 929 930Version 1.0.8beta4 [July 14, 2000] 931 Added the files pngbar.png and pngbar.jpg to the distribution. 932 Added makefile.cygwin, and cygwin support in pngconf.h 933 Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory) 934 935Version 1.0.8rc1 [July 16, 2000] 936 Revised png_debug() macros and statements to eliminate compiler warnings. 937 938Version 1.0.8 [July 24, 2000] 939 Added png_flush() in pngwrite.c, after png_write_IEND(). 940 Updated makefile.hpux to build a shared library. 941 942Version 1.0.9beta1 [November 10, 2000] 943 Fixed typo in scripts/makefile.hpux 944 Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser) 945 Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser) 946 Changed "cdrom.com" in documentation to "libpng.org" 947 Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg). 948 Changed type of "params" from voidp to png_voidp in png_read|write_png(). 949 Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h. 950 Revised the 3 instances of WRITEFILE in pngtest.c. 951 Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory. 952 Updated png.rc in dll/msvc project 953 Revised makefile.dec to define and use LIBPATH and INCPATH 954 Increased size of global png_libpng_ver[] array from 12 to 18 chars. 955 Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const. 956 Removed duplicate png_crc_finish() from png_handle_bKGD() function. 957 Added a warning when application calls png_read_update_info() multiple times. 958 Revised makefile.cygwin 959 Fixed bugs in iCCP support in pngrutil.c and pngwutil.c. 960 Replaced png_set_empty_plte_permitted() with png_permit_mng_features(). 961 962Version 1.0.9beta2 [November 19, 2000] 963 Renamed the "dll" subdirectory "projects". 964 Added borland project files to "projects" subdirectory. 965 Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate. 966 Add error message in png_set_compression_buffer_size() when malloc fails. 967 968Version 1.0.9beta3 [November 23, 2000] 969 Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project. 970 Removed the png_flush() in pngwrite.c that crashes some applications 971 that don't set png_output_flush_fn. 972 Added makefile.macosx and makefile.aix to scripts directory. 973 974Version 1.0.9beta4 [December 1, 2000] 975 Change png_chunk_warning to png_warning in png_check_keyword(). 976 Increased the first part of msg buffer from 16 to 18 in png_chunk_error(). 977 978Version 1.0.9beta5 [December 15, 2000] 979 Added support for filter method 64 (for PNG datastreams embedded in MNG). 980 981Version 1.0.9beta6 [December 18, 2000] 982 Revised png_set_filter() to accept filter method 64 when appropriate. 983 Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to 984 help prevent applications from using MNG features in PNG datastreams. 985 Added png_permit_mng_features() function. 986 Revised libpng.3/libpng.txt. Changed "filter type" to "filter method". 987 988Version 1.0.9rc1 [December 23, 2000] 989 Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c 990 Fixed error handling of unknown compression type in png_decompress_chunk(). 991 In pngconf.h, define __cdecl when _MSC_VER is defined. 992 993Version 1.0.9beta7 [December 28, 2000] 994 Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places. 995 Revised memory management in png_set_hIST and png_handle_hIST in a backward 996 compatible manner. PLTE and tRNS were revised similarly. 997 Revised the iCCP chunk reader to ignore trailing garbage. 998 999Version 1.0.9beta8 [January 12, 2001] 1000 Moved pngasmrd.h into pngconf.h. 1001 Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop. 1002 1003Version 1.0.9beta9 [January 15, 2001] 1004 Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to 1005 wince and msvc project module definition files. 1006 Minor revision of makefile.cygwin. 1007 Fixed bug with progressive reading of narrow interlaced images in pngpread.c 1008 1009Version 1.0.9beta10 [January 16, 2001] 1010 Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined. 1011 Fixed "png_mmx_supported" typo in project definition files. 1012 1013Version 1.0.9beta11 [January 19, 2001] 1014 Updated makefile.sgi to make shared library. 1015 Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED 1016 by default, for the benefit of DLL forward compatibility. These will 1017 be re-enabled in version 1.2.0. 1018 1019Version 1.0.9rc2 [January 22, 2001] 1020 Revised cygwin support. 1021 1022Version 1.0.9 [January 31, 2001] 1023 Added check of cygwin's ALL_STATIC in pngconf.h 1024 Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos. 1025 1026Version 1.0.10beta1 [March 14, 2001] 1027 Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc. 1028 Reformatted libpng.3 to eliminate bad line breaks. 1029 Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c 1030 Added prototype for png_mmx_support() near the top of pnggccrd.c 1031 Moved some error checking from png_handle_IHDR to png_set_IHDR. 1032 Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros. 1033 Revised png_mmx_support() function in pnggccrd.c 1034 Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c 1035 Fixed memory leak in contrib/visupng/PngFile.c 1036 Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version) 1037 Added warnings when retrieving or setting gamma=0. 1038 Increased the first part of msg buffer from 16 to 18 in png_chunk_warning(). 1039 1040Version 1.0.10rc1 [March 23, 2001] 1041 Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy, 1042 and png_strlen. 1043 Revised png_mmx_supported() function in pnggccrd.c to return proper value. 1044 Fixed bug in progressive reading (pngpread.c) with small images (height < 8). 1045 1046Version 1.0.10 [March 30, 2001] 1047 Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin 1048 Added beos project files (Chris Herborth) 1049 1050Version 1.0.11beta1 [April 3, 2001] 1051 Added type casts on several png_malloc() calls (Dimitri Papadapoulos). 1052 Removed a no-longer needed AIX work-around from pngconf.h 1053 Changed several "//" single-line comments to C-style in pnggccrd.c 1054 1055Version 1.0.11beta2 [April 11, 2001] 1056 Removed PNGAPI from several functions whose prototypes did not have PNGAPI. 1057 Updated scripts/pngos2.def 1058 1059Version 1.0.11beta3 [April 14, 2001] 1060 Added checking the results of many instances of png_malloc() for NULL 1061 1062Version 1.0.11beta4 [April 20, 2001] 1063 Undid the changes from version 1.0.11beta3. Added a check for NULL return 1064 from user's malloc_fn(). 1065 Removed some useless type casts of the NULL pointer. 1066 Added makefile.netbsd 1067 1068Version 1.0.11 [April 27, 2001] 1069 Revised makefile.netbsd 1070 1071Version 1.0.12beta1 [May 14, 2001] 1072 Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot) 1073 Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h 1074 Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings. 1075 Eliminated the png_error about apps using png_read|write_init(). Instead, 1076 libpng will reallocate the png_struct and info_struct if they are too small. 1077 This retains future binary compatibility for old applications written for 1078 libpng-0.88 and earlier. 1079 1080Version 1.2.0beta1 [May 6, 2001] 1081 Bumped DLLNUM to 2. 1082 Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED 1083 by default. 1084 Added runtime selection of MMX features. 1085 Added png_set_strip_error_numbers function and related macros. 1086 1087Version 1.2.0beta2 [May 7, 2001] 1088 Finished merging 1.2.0beta1 with version 1.0.11 1089 Added a check for attempts to read or write PLTE in grayscale PNG datastreams. 1090 1091Version 1.2.0beta3 [May 17, 2001] 1092 Enabled user memory function by default. 1093 Modified png_create_struct so it passes user mem_ptr to user memory allocator. 1094 Increased png_mng_features flag from png_byte to png_uint_32. 1095 Bumped shared-library (so-number) and dll-number to 3. 1096 1097Version 1.2.0beta4 [June 23, 2001] 1098 Check for missing profile length field in iCCP chunk and free chunk_data 1099 in case of truncated iCCP chunk. 1100 Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc 1101 Bumped dll-number from 2 to 3 in makefile.cygwin 1102 Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly 1103 if user attempts to run it on an 8-bit display. 1104 Updated contrib/gregbook 1105 Use png_malloc instead of png_zalloc to allocate palette in pngset.c 1106 Updated makefile.ibmc 1107 Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes 1108 of png_write_oFFS width and height from png_uint_32 to png_int_32. 1109 Updated example.c 1110 Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c 1111 1112Version 1.2.0beta5 [August 8, 2001] 1113 Revised contrib/gregbook 1114 Revised makefile.gcmmx 1115 Revised pnggccrd.c to conditionally compile some thread-unsafe code only 1116 when PNG_THREAD_UNSAFE_OK is defined. 1117 Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with 1118 value exceeding 2^bit_depth-1 1119 Revised makefile.sgi and makefile.sggcc 1120 Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c 1121 Removed restriction that do_invert_mono only operate on 1-bit opaque files 1122 1123Version 1.2.0 [September 1, 2001] 1124 Changed a png_warning() to png_debug() in pnggccrd.c 1125 Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC(). 1126 1127Version 1.2.1beta1 [October 19, 2001] 1128 Revised makefile.std in contrib/pngminus 1129 Include background_1 in png_struct regardless of gamma support. 1130 Revised makefile.netbsd and makefile.macosx, added makefile.darwin. 1131 Revised example.c to provide more details about using row_callback(). 1132 1133Version 1.2.1beta2 [October 25, 2001] 1134 Added type cast to each NULL appearing in a function call, except for 1135 WINCE functions. 1136 Added makefile.so9. 1137 1138Version 1.2.1beta3 [October 27, 2001] 1139 Removed type casts from all NULLs. 1140 Simplified png_create_struct_2(). 1141 1142Version 1.2.1beta4 [November 7, 2001] 1143 Revised png_create_info_struct() and png_creat_struct_2(). 1144 Added error message if png_write_info() was omitted. 1145 Type cast NULLs appearing in function calls when _NO_PROTO or 1146 PNG_TYPECAST_NULL is defined. 1147 1148Version 1.2.1rc1 [November 24, 2001] 1149 Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL 1150 is defined. 1151 Changed typecast of "size" argument to png_size_t in pngmem.c calls to 1152 the user malloc_fn, to agree with the prototype in png.h 1153 Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev) 1154 Updated makefile.sgi to recognize LIBPATH and INCPATH. 1155 Updated various makefiles so "make clean" does not remove previous major 1156 version of the shared library. 1157 1158Version 1.2.1rc2 [December 4, 2001] 1159 Always allocate 256-entry internal palette, hist, and trans arrays, to 1160 avoid out-of-bounds memory reference caused by invalid PNG datastreams. 1161 Added a check for prefix_length > data_length in iCCP chunk handler. 1162 1163Version 1.2.1 [December 7, 2001] 1164 None. 1165 1166Version 1.2.2beta1 [February 22, 2002] 1167 Fixed a bug with reading the length of iCCP profiles (Larry Reeves). 1168 Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate 1169 libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h 1170 Revised makefile.darwin to remove "-undefined suppress" option. 1171 Added checks for gamma and chromaticity values over 21474.83, which exceed 1172 the limit for PNG unsigned 32-bit integers when encoded. 1173 Revised calls to png_create_read_struct() and png_create_write_struct() 1174 for simpler debugging. 1175 Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK) 1176 1177Version 1.2.2beta2 [February 23, 2002] 1178 Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths. 1179 Check for invalid image dimensions in png_get_IHDR. 1180 Added missing "fi;" in the install target of the SGI makefiles. 1181 Added install-static to all makefiles that make shared libraries. 1182 Always do gamma compensation when image is partially transparent. 1183 1184Version 1.2.2beta3 [March 7, 2002] 1185 Compute background.gray and background_1.gray even when color_type is RGB 1186 in case image gets reduced to gray later. 1187 Modified shared-library makefiles to install pkgconfig/libpngNN.pc. 1188 Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown 1189 Removed unused png_write_destroy_info prototype from png.h 1190 Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case 1191 Added install-shared target to all makefiles that make shared libraries. 1192 Stopped a double free of palette, hist, and trans when not using free_me. 1193 Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64. 1194 1195Version 1.2.2beta4 [March 8, 2002] 1196 Compute background.gray and background_1.gray even when color_type is RGB 1197 in case image gets reduced to gray later (Jason Summers). 1198 Relocated a misplaced /bin/rm in the "install-shared" makefile targets 1199 Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library. 1200 1201Version 1.2.2beta5 [March 26, 2002] 1202 Added missing PNGAPI to several function definitions. 1203 Check for invalid bit_depth or color_type in png_get_IHDR(), and 1204 check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen). 1205 Revised iTXt support to accept NULL for lang and lang_key. 1206 Compute gamma for color components of background even when color_type is gray. 1207 Changed "()" to "{}" in scripts/libpng.pc.in. 1208 Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN 1209 Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so 1210 1211Version 1.2.2beta6 [March 31, 2002] 1212 1213Version 1.0.13beta1 [March 31, 2002] 1214 Prevent png_zalloc() from trying to memset memory that it failed to acquire. 1215 Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate). 1216 Ensure that the right function (user or default) is used to free the 1217 png_struct after an error in png_create_read_struct_2(). 1218 1219Version 1.2.2rc1 [April 7, 2002] 1220 1221Version 1.0.13rc1 [April 7, 2002] 1222 Save the ebx register in pnggccrd.c (Sami Farin) 1223 Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner). 1224 Updated makefiles to put headers in include/libpng and remove old include/*.h. 1225 1226Version 1.2.2 [April 15, 2002] 1227 1228Version 1.0.13 [April 15, 2002] 1229 Revised description of png_set_filter() in libpng.3/libpng.txt. 1230 Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd 1231 1232Version 1.0.13patch01 [April 17, 2002] 1233 1234Version 1.2.2patch01 [April 17, 2002] 1235 Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and 1236 makefile.sggcc 1237 Fixed VER -> PNGVER typo in makefile.macosx and added install-static to 1238 install 1239 Added install: target to makefile.32sunu and makefile.64sunu 1240 1241Version 1.0.13patch03 [April 18, 2002] 1242 1243Version 1.2.2patch03 [April 18, 2002] 1244 Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng 1245 subdirectory to libpngNN subdirectory without the full pathname. 1246 Moved generation of libpng.pc from "install" to "all" in 15 makefiles. 1247 1248Version 1.2.3rc1 [April 28, 2002] 1249 Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos). 1250 Added $(DESTDIR) feature to 24 makefiles (Tim Mooney) 1251 Fixed bug with $prefix, should be $(prefix) in makefile.hpux. 1252 Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin 1253 Added a link from libpngNN.pc to libpng.pc in 15 makefiles. 1254 Added links from include/libpngNN/*.h to include/*.h in 24 makefiles. 1255 Revised makefile.darwin to make relative links without full pathname. 1256 Added setjmp() at the end of png_create_*_struct_2() in case user forgets 1257 to put one in their application. 1258 Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and 1259 removed them from module definition files. 1260 1261Version 1.2.3rc2 [May 1, 2002] 1262 Fixed bug in reporting number of channels in pngget.c and pngset.c, 1263 that was introduced in version 1.2.2beta5. 1264 Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(), 1265 png_default_flush(), and png_push_fill_buffer() and included them in 1266 module definition files. 1267 Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles. 1268 1269Version 1.2.3rc3 [May 1, 2002] 1270 Revised prototype for png_default_flush() 1271 Remove old libpng.pc and libpngNN.pc before installing new ones. 1272 1273Version 1.2.3rc4 [May 2, 2002] 1274 Typos in *.def files (png_default_read|write -> png_default_read|write_data) 1275 In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc 1276 Added libpng-config and libpngNN-config and modified makefiles to install 1277 them. 1278 Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles 1279 Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp 1280 1281Version 1.2.3rc5 [May 11, 2002] 1282 Changed "error" and "message" in prototypes to "error_message" and 1283 "warning_message" to avoid namespace conflict. 1284 Revised 15 makefiles to build libpng-config from libpng-config-*.in 1285 Once more restored png_zalloc and png_zfree to regular nonexported form. 1286 Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer 1287 to nonexported form, but with PNGAPI, and removed them from module def 1288 files. 1289 1290Version 1.2.3rc6 [May 14, 2002] 1291 Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c 1292 Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp. 1293 Removed leftover libpng-config "sed" script from four makefiles. 1294 Revised libpng-config creating script in 16 makefiles. 1295 1296Version 1.2.3 [May 22, 2002] 1297 Revised libpng-config target in makefile.cygwin. 1298 Removed description of png_set_mem_fn() from documentation. 1299 Revised makefile.freebsd. 1300 Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR). 1301 Revised projects/msvc/README.txt 1302 Changed -lpng to -lpngNN in LDFLAGS in several makefiles. 1303 1304Version 1.2.4beta1 [May 24, 2002] 1305 Added libpng.pc and libpng-config to "all:" target in 16 makefiles. 1306 Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH) 1307 Added missing "\" before closing double quote in makefile.gcmmx. 1308 Plugged various memory leaks; added png_malloc_warn() and png_set_text_2() 1309 functions. 1310 1311Version 1.2.4beta2 [June 25, 2002] 1312 Plugged memory leak of png_ptr->current_text (Matt Holgate). 1313 Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison) 1314 Added -soname to the loader flags in makefile.dec, makefile.sgi, and 1315 makefile.sggcc. 1316 Added "test-installed" target to makefile.linux, makefile.gcmmx, 1317 makefile.sgi, and makefile.sggcc. 1318 1319Version 1.2.4beta3 [June 28, 2002] 1320 Plugged memory leak of row_buf in pngtest.c when there is a png_error(). 1321 Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data. 1322 Added "test-installed" target to makefile.32sunu, makefile.64sunu, 1323 makefile.beos, makefile.darwin, makefile.dec, makefile.macosx, 1324 makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9. 1325 1326Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002] 1327 Added "test-installed" target to makefile.cygwin and makefile.sco. 1328 Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro. 1329 1330Version 1.2.4 and 1.0.14 [July 8, 2002] 1331 Changed png_warning() to png_error() when width is too large to process. 1332 1333Version 1.2.4patch01 [July 20, 2002] 1334 Revised makefile.cygwin to use DLL number 12 instead of 13. 1335 1336Version 1.2.5beta1 [August 6, 2002] 1337 Added code to contrib/gregbook/readpng2.c to ignore unused chunks. 1338 Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11) 1339 Removed some stray *.o files from contrib/gregbook. 1340 Changed png_error() to png_warning() about "Too much data" in pngpread.c 1341 and about "Extra compressed data" in pngrutil.c. 1342 Prevent png_ptr->pass from exceeding 7 in png_push_finish_row(). 1343 Updated makefile.hpgcc 1344 Updated png.c and pnggccrd.c handling of return from png_mmx_support() 1345 1346Version 1.2.5beta2 [August 15, 2002] 1347 Only issue png_warning() about "Too much data" in pngpread.c when avail_in 1348 is nonzero. 1349 Updated makefiles to install a separate libpng.so.3 with its own rpath. 1350 1351Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002] 1352 Revised makefiles to not remove previous minor versions of shared libraries. 1353 1354Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002] 1355 Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared 1356 library loader directive. 1357 Added missing "$OBJSDLL" line to makefile.gcmmx. 1358 Added missing "; fi" to makefile.32sunu. 1359 1360Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002] 1361 Revised libpng-config script. 1362 1363Version 1.2.5 and 1.0.15 [October 3, 2002] 1364 Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux, 1365 and makefile.aix. 1366 Relocated two misplaced PNGAPI lines in pngtest.c 1367 1368Version 1.2.6beta1 [October 22, 2002] 1369 Commented out warning about uninitialized mmx_support in pnggccrd.c. 1370 Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h. 1371 Relocated two more misplaced PNGAPI lines in pngtest.c 1372 Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams, 1373 introduced in version 1.0.2. 1374 Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu. 1375 1376Version 1.2.6beta2 [November 1, 2002] 1377 Added libpng-config "--ldopts" output. 1378 Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)" 1379 in makefiles. 1380 1381Version 1.2.6beta3 [July 18, 2004] 1382 Reverted makefile changes from version 1.2.6beta2 and some of the changes 1383 from version 1.2.6beta1; these will be postponed until version 1.2.7. 1384 Version 1.2.6 is going to be a simple bugfix release. 1385 Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile. 1386 Fixed potential overrun in pngerror.c by using strncpy instead of memcpy. 1387 Added "#!/bin/sh" at the top of configure, for recognition of the 1388 'x' flag under Cygwin (Cosmin). 1389 Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin). 1390 Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin). 1391 Fixed the special memory handler for Borland C under DOS, in pngmem.c 1392 (Cosmin). 1393 Removed some spurious assignments in pngrutil.c (Cosmin). 1394 Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings 1395 on 16-bit platforms (Cosmin). 1396 Enclosed shift op expressions in parentheses, to silence warnings (Cosmin). 1397 Used proper type png_fixed_point, to avoid problems on 16-bit platforms, 1398 in png_handle_sRGB() (Cosmin). 1399 Added compression_type to png_struct, and optimized the window size 1400 inside the deflate stream (Cosmin). 1401 Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin). 1402 Fixed handling of unknown chunks that come after IDAT (Cosmin). 1403 Allowed png_error() and png_warning() to work even if png_ptr == NULL 1404 (Cosmin). 1405 Replaced row_info->rowbytes with row_bytes in png_write_find_filter() 1406 (Cosmin). 1407 Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre). 1408 Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded 1409 values in png.c (Simon-Pierre, Cosmin). 1410 Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre). 1411 Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc 1412 (Simon-Pierre). 1413 Moved the definition of PNG_HEADER_VERSION_STRING near the definitions 1414 of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin). 1415 Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin). 1416 Updated scripts/makefile.vc(a)win32 (Cosmin). 1417 Updated the MSVC project (Simon-Pierre, Cosmin). 1418 Updated the Borland C++ Builder project (Cosmin). 1419 Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin). 1420 Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin). 1421 Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin). 1422 Added extra guard around inclusion of Turbo C memory headers, in pngconf.h 1423 (Cosmin). 1424 Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to 1425 projects/cbuilder5/ (Cosmin). 1426 Moved projects/visualc6/png32ms.def to scripts/pngw32.def, 1427 and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin). 1428 Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin). 1429 Changed line endings to DOS style in cbuilder5 and visualc6 files, even 1430 in the tar.* distributions (Cosmin). 1431 Updated contrib/visupng/VisualPng.dsp (Cosmin). 1432 Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin). 1433 Added a separate distribution with "configure" and supporting files (Junichi). 1434 1435Version 1.2.6beta4 [July 28, 2004] 1436 Added user ability to change png_size_t via a PNG_SIZE_T macro. 1437 Added png_sizeof() and png_convert_size() functions. 1438 Added PNG_SIZE_MAX (maximum value of a png_size_t variable. 1439 Added check in png_malloc_default() for (size_t)size != (png_uint_32)size 1440 which would indicate an overflow. 1441 Changed sPLT failure action from png_error to png_warning and abandon chunk. 1442 Changed sCAL and iCCP failures from png_error to png_warning and abandon. 1443 Added png_get_uint_31(png_ptr, buf) function. 1444 Added PNG_UINT_32_MAX macro. 1445 Renamed PNG_MAX_UINT to PNG_UINT_31_MAX. 1446 Made png_zalloc() issue a png_warning and return NULL on potential 1447 overflow. 1448 Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x 1449 Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4. 1450 Revised Borland portion of png_malloc() to return NULL or issue 1451 png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK. 1452 Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove 1453 sequential read support. 1454 Added some "#if PNG_WRITE_SUPPORTED" blocks. 1455 Added #ifdef to remove some redundancy in png_malloc_default(). 1456 Use png_malloc instead of png_zalloc to allocate the palette. 1457 1458Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004] 1459 Fixed buffer overflow vulnerability (CVE-2004-0597) in png_handle_tRNS(). 1460 Fixed NULL dereference vulnerability (CVE-2004-0598) in png_handle_iCCP(). 1461 Fixed integer overflow vulnerability (CVE-2004-0599) in png_read_png(). 1462 Fixed some harmless bugs in png_handle_sBIT, etc, that would cause 1463 duplicate chunk types to go undetected. 1464 Fixed some timestamps in the -config version 1465 Rearranged order of processing of color types in png_handle_tRNS(). 1466 Added ROWBYTES macro to calculate rowbytes without integer overflow. 1467 Updated makefile.darwin and removed makefile.macosx from scripts directory. 1468 Imposed default one million column, one-million row limits on the image 1469 dimensions, and added png_set_user_limits() function to override them. 1470 Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro. 1471 Fixed wrong cast of returns from png_get_user_width|height_max(). 1472 Changed some "keep the compiler happy" from empty statements to returns, 1473 Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution 1474 1475Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004] 1476 Revised makefile.darwin and makefile.solaris. Removed makefile.macosx. 1477 Revised pngtest's png_debug_malloc() to use png_malloc() instead of 1478 png_malloc_default() which is not supposed to be exported. 1479 Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in 1480 pngpread.c. Bug was introduced in 1.2.6rc1. 1481 Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1. 1482 Fixed old bug in RGB to Gray transformation. 1483 Fixed problem with 64-bit compilers by casting arguments to abs() 1484 to png_int_32. 1485 Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9). 1486 Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin) 1487 Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles. 1488 Added code to update the row_info->colortype in png_do_read_filler() (MSB). 1489 1490Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004] 1491 Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid 1492 trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro. 1493 Revised documentation of png_set_keep_unknown_chunks(). 1494 Check handle_as_unknown status in pngpread.c, as in pngread.c previously. 1495 Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h 1496 Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c 1497 1498Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004] 1499 Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of 1500 "pinfo" was out of place). 1501 1502Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004] 1503 Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED 1504 section of png.h where they were inadvertently placed in version rc3. 1505 1506Version 1.2.6 and 1.0.16 [August 15, 2004] 1507 Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1. 1508 1509Version 1.2.7beta1 [August 26, 2004] 1510 Removed unused pngasmrd.h file. 1511 Removed references to uu.net for archived files. Added references to 1512 PNG Spec (second edition) and the PNG ISO/IEC Standard. 1513 Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR. 1514 Fixed bug with "optimized window size" in the IDAT datastream, that 1515 causes libpng to write PNG files with incorrect zlib header bytes. 1516 1517Version 1.2.7beta2 [August 28, 2004] 1518 Fixed bug with sCAL chunk and big-endian machines (David Munro). 1519 Undid new code added in 1.2.6rc2 to update the color_type in 1520 png_set_filler(). 1521 Added png_set_add_alpha() that updates color type. 1522 1523Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004] 1524 Revised png_set_strip_filler() to not remove alpha if color_type has alpha. 1525 1526Version 1.2.7 and 1.0.17 [September 12, 2004] 1527 Added makefile.hp64 1528 Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin 1529 1530Version 1.2.8beta1 [November 1, 2004] 1531 Fixed bug in png_text_compress() that would fail to complete a large block. 1532 Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during 1533 strip alpha operation in png_do_strip_filler(). 1534 Added PNG_1_2_X definition in pngconf.h 1535 Use #ifdef to comment out png_info_init in png.c and png_read_init in 1536 pngread.c (as of 1.3.0) 1537 1538Version 1.2.8beta2 [November 2, 2004] 1539 Reduce color_type to a nonalpha type after strip alpha operation in 1540 png_do_strip_filler(). 1541 1542Version 1.2.8beta3 [November 3, 2004] 1543 Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM 1544 1545Version 1.2.8beta4 [November 12, 2004] 1546 Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin). 1547 Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin). 1548 Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection 1549 of data type in deflate (Cosmin). 1550 Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of 1551 PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING. 1552 1553Version 1.2.8beta5 [November 20, 2004] 1554 Use png_ptr->flags instead of png_ptr->transformations to pass 1555 PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI 1556 compatibility. 1557 Revised handling of SPECIALBUILD, PRIVATEBUILD, 1558 PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING. 1559 1560Version 1.2.8rc1 [November 24, 2004] 1561 Moved handling of BUILD macros from pngconf.h to png.h 1562 Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently 1563 omitted from beta5. 1564 Revised scripts/pngw32.rc 1565 Despammed mailing addresses by masking "@" with "at". 1566 Inadvertently installed a supposedly faster test version of pngrutil.c 1567 1568Version 1.2.8rc2 [November 26, 2004] 1569 Added two missing "\" in png.h 1570 Change tests in pngread.c and pngpread.c to 1571 if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA)) 1572 png_do_read_transformations(png_ptr); 1573 1574Version 1.2.8rc3 [November 28, 2004] 1575 Reverted pngrutil.c to version libpng-1.2.8beta5. 1576 Added scripts/makefile.elf with supporting code in pngconf.h for symbol 1577 versioning (John Bowler). 1578 1579Version 1.2.8rc4 [November 29, 2004] 1580 Added projects/visualc7 (Simon-pierre). 1581 1582Version 1.2.8rc5 [November 29, 2004] 1583 Fixed new typo in scripts/pngw32.rc 1584 1585Version 1.2.8 [December 3, 2004] 1586 Removed projects/visualc7, added projects/visualc71. 1587 1588Version 1.2.9beta1 [February 21, 2006] 1589 Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints 1590 Revised man page and libpng.txt to make it clear that one should not call 1591 png_read_end or png_write_end after png_read_png or png_write_png. 1592 Updated references to png-mng-implement mailing list. 1593 Fixed an incorrect typecast in pngrutil.c 1594 Added PNG_NO_READ_SUPPORTED conditional for making a write-only library. 1595 Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional. 1596 Optimized alpha-inversion loops in pngwtran.c 1597 Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c 1598 Make sure num_trans is <= 256 before copying data in png_set_tRNS(). 1599 Make sure num_palette is <= 256 before copying data in png_set_PLTE(). 1600 Interchanged order of write_swap_alpha and write_invert_alpha transforms. 1601 Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin). 1602 Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin). 1603 Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin). 1604 Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16, 1605 png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin). 1606 Added type cast (png_byte) in png_write_sCAL() (Cosmin). 1607 Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin). 1608 Default iTXt support was inadvertently enabled. 1609 1610Version 1.2.9beta2 [February 21, 2006] 1611 Check for png_rgb_to_gray and png_gray_to_rgb read transformations before 1612 checking for png_read_dither in pngrtran.c 1613 Revised checking of chromaticity limits to accommodate extended RGB 1614 colorspace (John Denker). 1615 Changed line endings in some of the project files to CRLF, even in the 1616 "Unix" tar distributions (Cosmin). 1617 Made png_get_int_32 and png_save_int_32 always available (Cosmin). 1618 Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def 1619 with the newly exported functions. 1620 Eliminated distributions without the "configure" script. 1621 Updated INSTALL instructions. 1622 1623Version 1.2.9beta3 [February 24, 2006] 1624 Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp 1625 Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler) 1626 Removed reference to pngasmrd.h from Makefile.am 1627 Renamed CHANGES to ChangeLog. 1628 Renamed LICENSE to COPYING. 1629 Renamed ANNOUNCE to NEWS. 1630 Created AUTHORS file. 1631 1632Version 1.2.9beta4 [March 3, 2006] 1633 Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac 1634 Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING. 1635 Removed newline from the end of some error and warning messages. 1636 Removed test for sqrt() from configure.ac and configure. 1637 Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix). 1638 Disabled default iTXt support that was inadvertently enabled in 1639 libpng-1.2.9beta1. 1640 Added "OS2" to list of systems that don't need underscores, in pnggccrd.c 1641 Removed libpng version and date from *.c files. 1642 1643Version 1.2.9beta5 [March 4, 2006] 1644 Removed trailing blanks from source files. 1645 Put version and date of latest change in each source file, and changed 1646 copyright year accordingly. 1647 More cleanup of configure.ac, Makefile.am, and associated scripts. 1648 Restored scripts/makefile.elf which was inadvertently deleted. 1649 1650Version 1.2.9beta6 [March 6, 2006] 1651 Fixed typo (RELEASE) in configuration files. 1652 1653Version 1.2.9beta7 [March 7, 2006] 1654 Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am 1655 Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s() 1656 in png.h. 1657 Updated makefile.elf as suggested by debian. 1658 Made cosmetic changes to some makefiles, adding LN_SF and other macros. 1659 Made some makefiles accept "exec_prefix". 1660 1661Version 1.2.9beta8 [March 9, 2006] 1662 Fixed some "#if defined (..." which should be "#if defined(..." 1663 Bug introduced in libpng-1.2.8. 1664 Fixed inconsistency in definition of png_default_read_data() 1665 Restored blank that was lost from makefile.sggcc "clean" target in beta7. 1666 Revised calculation of "current" and "major" for irix in ltmain.sh 1667 Changed "mkdir" to "MKDIR_P" in some makefiles. 1668 Separated PNG_EXPAND and PNG_EXPAND_tRNS. 1669 Added png_set_expand_gray_1_2_4_to_8() and deprecated 1670 png_set_gray_1_2_4_to_8() which also expands tRNS to alpha. 1671 1672Version 1.2.9beta9 [March 10, 2006] 1673 Include "config.h" in pngconf.h when available. 1674 Added some checks for NULL png_ptr or NULL info_ptr (timeless) 1675 1676Version 1.2.9beta10 [March 20, 2006] 1677 Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin) 1678 Made pnggccrd.c PIC-compliant (Christian Aichinger). 1679 Added makefile.mingw (Wolfgang Glas). 1680 Revised pngconf.h MMX checking. 1681 1682Version 1.2.9beta11 [March 22, 2006] 1683 Fixed out-of-order declaration in pngwrite.c that was introduced in beta9 1684 Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros. 1685 1686Version 1.2.9rc1 [March 31, 2006] 1687 Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin). 1688 Removed nonsensical assertion check from pngtest.c (Cosmin). 1689 1690Version 1.2.9 [April 14, 2006] 1691 Revised makefile.beos and added "none" selector in ltmain.sh 1692 1693Version 1.2.10beta1 [April 15, 2006] 1694 Renamed "config.h" to "png_conf.h" and revised Makefile.am to add 1695 -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h 1696 to include png_conf.h only when PNG_BUILDING_LIBPNG is defined. 1697 1698Version 1.2.10beta2 [April 15, 2006] 1699 Manually updated Makefile.in and configure. Changed png_conf.h.in 1700 back to config.h. 1701 1702Version 1.2.10beta3 [April 15, 2006] 1703 Change png_conf.h back to config.h in pngconf.h. 1704 1705Version 1.2.10beta4 [April 16, 2006] 1706 Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*. 1707 1708Version 1.2.10beta5 [April 16, 2006] 1709 Added a configure check for compiling assembler code in pnggccrd.c 1710 1711Version 1.2.10beta6 [April 17, 2006] 1712 Revised the configure check for pnggccrd.c 1713 Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@ 1714 Added @LIBPNG_DEFINES@ to arguments when building libpng.sym 1715 1716Version 1.2.10beta7 [April 18, 2006] 1717 Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles. 1718 1719Version 1.2.10rc1 [April 19, 2006] 1720 Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD 1721 Fixed "LN_FS" typo in makefile.sco and makefile.solaris. 1722 1723Version 1.2.10rc2 [April 20, 2006] 1724 Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE 1725 in configure.ac and configure 1726 Made the configure warning about versioned symbols less arrogant. 1727 1728Version 1.2.10rc3 [April 21, 2006] 1729 Added a note in libpng.txt that png_set_sig_bytes(8) can be used when 1730 writing an embedded PNG without the 8-byte signature. 1731 Revised makefiles and configure to avoid making links to libpng.so.* 1732 1733Version 1.2.10 [April 23, 2006] 1734 Reverted configure to "rc2" state. 1735 1736Version 1.2.11beta1 [May 31, 2006] 1737 scripts/libpng.pc.in contained "configure" style version info and would 1738 not work with makefiles. 1739 The shared-library makefiles were linking to libpng.so.0 instead of 1740 libpng.so.3 compatibility as the library. 1741 1742Version 1.2.11beta2 [June 2, 2006] 1743 Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid 1744 buffer overflow. 1745 Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb) 1746 1747Version 1.2.11beta3 [June 5, 2006] 1748 Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin). 1749 Removed the accidental leftover Makefile.in~ (Cosmin). 1750 Avoided potential buffer overflow and optimized buffer in 1751 png_write_sCAL(), png_write_sCAL_s() (Cosmin). 1752 Removed the include directories and libraries from CFLAGS and LDFLAGS 1753 in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin). 1754 1755Version 1.2.11beta4 [June 6, 2006] 1756 Allow zero-length IDAT chunks after the entire zlib datastream, but not 1757 after another intervening chunk type. 1758 1759Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006] 1760 Deleted extraneous square brackets from [config.h] in configure.ac 1761 1762Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006] 1763 Added prototypes for PNG_INCH_CONVERSIONS functions to png.h 1764 Revised INSTALL and autogen.sh 1765 Fixed typo in several makefiles (-W1 should be -Wl) 1766 Added typedef for png_int_32 and png_uint_32 on 64-bit systems. 1767 1768Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006] 1769 Removed the new typedefs for 64-bit systems (delay until version 1.4.0) 1770 Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid 1771 reading out of bounds. 1772 1773Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006] 1774 Really removed the new typedefs for 64-bit systems. 1775 1776Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006] 1777 Removed png_sig_bytes entry from scripts/pngw32.def 1778 1779Version 1.0.19, 1.2.11 [June 26, 2006] 1780 None. 1781 1782Version 1.0.20, 1.2.12 [June 27, 2006] 1783 Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid 1784 buffer overflow. 1785 1786Version 1.2.13beta1 [October 2, 2006] 1787 Removed AC_FUNC_MALLOC from configure.ac 1788 Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h 1789 Change "logical" to "bitwise" throughout documentation. 1790 Detect and fix attempt to write wrong iCCP profile length (CVE-2006-7244) 1791 1792Version 1.0.21, 1.2.13 [November 14, 2006] 1793 Fix potential buffer overflow in sPLT chunk handler. 1794 Fix Makefile.am to not try to link to noexistent files. 1795 Check all exported functions for NULL png_ptr. 1796 1797Version 1.2.14beta1 [November 17, 2006] 1798 Relocated three misplaced tests for NULL png_ptr. 1799 Built Makefile.in with automake-1.9.6 instead of 1.9.2. 1800 Build configure with autoconf-2.60 instead of 2.59 1801 1802Version 1.2.14beta2 [November 17, 2006] 1803 Added some typecasts in png_zalloc(). 1804 1805Version 1.2.14rc1 [November 20, 2006] 1806 Changed "strtod" to "png_strtod" in pngrutil.c 1807 1808Version 1.0.22, 1.2.14 [November 27, 2006] 1809 Added missing "$(srcdir)" in Makefile.am and Makefile.in 1810 1811Version 1.2.15beta1 [December 3, 2006] 1812 Generated configure with autoconf-2.61 instead of 2.60 1813 Revised configure.ac to update libpng.pc and libpng-config. 1814 1815Version 1.2.15beta2 [December 3, 2006] 1816 Always export MMX asm functions, just stubs if not building pnggccrd.c 1817 1818Version 1.2.15beta3 [December 4, 2006] 1819 Add "png_bytep" typecast to profile while calculating length in pngwutil.c 1820 1821Version 1.2.15beta4 [December 7, 2006] 1822 Added scripts/CMakeLists.txt 1823 Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta 1824 1825Version 1.2.15beta5 [December 7, 2006] 1826 Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c 1827 Revised scripts/CMakeLists.txt 1828 1829Version 1.2.15beta6 [December 13, 2006] 1830 Revised scripts/CMakeLists.txt and configure.ac 1831 1832Version 1.2.15rc1 [December 18, 2006] 1833 Revised scripts/CMakeLists.txt 1834 1835Version 1.2.15rc2 [December 21, 2006] 1836 Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers. 1837 Added scripts/makefile.nommx 1838 1839Version 1.2.15rc3 [December 25, 2006] 1840 Fixed shared library numbering error that was introduced in 1.2.15beta6. 1841 1842Version 1.2.15rc4 [December 27, 2006] 1843 Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set. 1844 1845Version 1.2.15rc5 [December 31, 2006] 1846 Revised handling of rgb_to_gray. 1847 1848Version 1.2.15 [January 5, 2007] 1849 Added some (unsigned long) typecasts in pngtest.c to avoid printing errors. 1850 1851Version 1.2.16beta1 [January 6, 2007] 1852 Fix bugs in makefile.nommx 1853 1854Version 1.2.16beta2 [January 16, 2007] 1855 Revised scripts/CMakeLists.txt 1856 1857Version 1.2.16 [January 31, 2007] 1858 No changes. 1859 1860Version 1.2.17beta1 [March 6, 2007] 1861 Revised scripts/CMakeLists.txt to install both shared and static libraries. 1862 Deleted a redundant line from pngset.c. 1863 1864Version 1.2.17beta2 [April 26, 2007] 1865 Relocated misplaced test for png_ptr == NULL in pngpread.c 1866 Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN 1867 flags. 1868 Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_* 1869 Added pngerror() when write_IHDR fails in deflateInit2(). 1870 Added "const" to some array declarations. 1871 Mention examples of libpng usage in the libpng*.txt and libpng.3 documents. 1872 1873Version 1.2.17rc1 [May 4, 2007] 1874 No changes. 1875 1876Version 1.2.17rc2 [May 8, 2007] 1877 Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications 1878 calling set_unknown_chunk_location() need them. 1879 Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in 1880 png_set_expand_gray_1_2_4_to_8(). 1881 Added png_ptr->unknown_chunk to hold working unknown chunk data, so it 1882 can be free'ed in case of error. Revised unknown chunk handling in 1883 pngrutil.c and pngpread.c to use this structure. 1884 1885Version 1.2.17rc3 [May 8, 2007] 1886 Revised symbol-handling in configure script. 1887 1888Version 1.2.17rc4 [May 10, 2007] 1889 Revised unknown chunk handling to avoid storing unknown critical chunks. 1890 1891Version 1.0.25 [May 15, 2007] 1892Version 1.2.17 [May 15, 2007] 1893 Added "png_ptr->num_trans=0" before error return in png_handle_tRNS, 1894 to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664) 1895 1896Version 1.0.26 [May 15, 2007] 1897Version 1.2.18 [May 15, 2007] 1898 Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script 1899 1900Version 1.2.19beta1 [May 18, 2007] 1901 Changed "const static" to "static PNG_CONST" everywhere, mostly undoing 1902 change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST" 1903 Changed some handling of unused parameters, to avoid compiler warnings. 1904 "if (unused == NULL) return;" becomes "unused = unused". 1905 1906Version 1.2.19beta2 [May 18, 2007] 1907 Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier) 1908 1909Version 1.2.19beta3 [May 19, 2007] 1910 Add some "png_byte" typecasts in png_check_keyword() and write new_key 1911 instead of key in zTXt chunk (Kevin Ryde). 1912 1913Version 1.2.19beta4 [May 21, 2007] 1914 Add png_snprintf() function and use it in place of sprint() for improved 1915 defense against buffer overflows. 1916 1917Version 1.2.19beta5 [May 21, 2007] 1918 Fixed png_handle_tRNS() to only use the valid bits of tRNS value. 1919 Changed handling of more unused parameters, to avoid compiler warnings. 1920 Removed some PNG_CONST in pngwutil.c to avoid compiler warnings. 1921 1922Version 1.2.19beta6 [May 22, 2007] 1923 Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c 1924 Added a special "_MSC_VER" case that defines png_snprintf to _snprintf 1925 1926Version 1.2.19beta7 [May 22, 2007] 1927 Squelched png_squelch_warnings() in pnggccrd.c and added 1928 an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused 1929 the warnings that png_squelch_warnings was squelching. 1930 1931Version 1.2.19beta8 [May 22, 2007] 1932 Removed __MMX__ from test in pngconf.h. 1933 1934Version 1.2.19beta9 [May 23, 2007] 1935 Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro. 1936 Revised png_squelch_warnings() so it might work. 1937 Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86. 1938 1939Version 1.2.19beta10 [May 24, 2007] 1940 Resquelched png_squelch_warnings(), use "__attribute__((used))" instead. 1941 1942Version 1.4.0beta1 [April 20, 2006] 1943 Enabled iTXt support (changes png_struct, thus requires so-number change). 1944 Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED 1945 Eliminated PNG_1_0_X and PNG_1_2_X macros. 1946 Removed deprecated functions png_read_init, png_write_init, png_info_init, 1947 png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and 1948 removed the deprecated macro PNG_MAX_UINT. 1949 Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h 1950 Removed many WIN32_WCE #ifdefs (Cosmin). 1951 Reduced dependency on C-runtime library when on Windows (Simon-Pierre) 1952 Replaced sprintf() with png_sprintf() (Simon-Pierre) 1953 1954Version 1.4.0beta2 [April 20, 2006] 1955 Revised makefiles and configure to avoid making links to libpng.so.* 1956 Moved some leftover MMX-related defines from pngconf.h to pngintrn.h 1957 Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def 1958 1959Version 1.4.0beta3 [May 10, 2006] 1960 Updated scripts/pngw32.def to comment out MMX functions. 1961 Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros. 1962 Scripts/libpng.pc.in contained "configure" style version info and would 1963 not work with makefiles. 1964 Revised pngconf.h and added pngconf.h.in, so makefiles and configure can 1965 pass defines to libpng and applications. 1966 1967Version 1.4.0beta4 [May 11, 2006] 1968 Revised configure.ac, Makefile.am, and many of the makefiles to write 1969 their defines in pngconf.h. 1970 1971Version 1.4.0beta5 [May 15, 2006] 1972 Added a missing semicolon in Makefile.am and Makefile.in 1973 Deleted extraneous square brackets from configure.ac 1974 1975Version 1.4.0beta6 [June 2, 2006] 1976 Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid 1977 buffer overflow. 1978 Changed sonum from 0 to 1. 1979 Removed unused prototype for png_check_sig() from png.h 1980 1981Version 1.4.0beta7 [June 16, 2006] 1982 Exported png_write_sig (Cosmin). 1983 Optimized buffer in png_handle_cHRM() (Cosmin). 1984 Set pHYs = 2835 x 2835 pixels per meter, and added 1985 sCAL = 0.352778e-3 x 0.352778e-3 meters, in pngtest.png (Cosmin). 1986 Added png_set_benign_errors(), png_benign_error(), png_chunk_benign_error(). 1987 Added typedef for png_int_32 and png_uint_32 on 64-bit systems. 1988 Added "(unsigned long)" typecast on png_uint_32 variables in printf lists. 1989 1990Version 1.4.0beta8 [June 22, 2006] 1991 Added demonstration of user chunk support in pngtest.c, to support the 1992 public sTER chunk and a private vpAg chunk. 1993 1994Version 1.4.0beta9 [July 3, 2006] 1995 Removed ordinals from scripts/pngw32.def and removed png_info_int and 1996 png_set_gray_1_2_4_to_8 entries. 1997 Inline call of png_get_uint_32() in png_get_uint_31(). 1998 Use png_get_uint_31() to get vpAg width and height in pngtest.c 1999 Removed WINCE and Netware projects. 2000 Removed standalone Y2KINFO file. 2001 2002Version 1.4.0beta10 [July 12, 2006] 2003 Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and 2004 some makefiles, because it was not working reliably. Instead, distribute 2005 pngconf.h.in along with pngconf.h and cause configure and some of the 2006 makefiles to update pngconf.h from pngconf.h.in. 2007 Added pngconf.h to DEPENDENCIES in Makefile.am 2008 2009Version 1.4.0beta11 [August 19, 2006] 2010 Removed AC_FUNC_MALLOC from configure.ac. 2011 Added a warning when writing iCCP profile with mismatched profile length. 2012 Patched pnggccrd.c to assemble on x86_64 platforms. 2013 Moved chunk header reading into a separate function png_read_chunk_header() 2014 in pngrutil.c. The chunk header (len+sig) is now serialized in a single 2015 operation (Cosmin). 2016 Implemented support for I/O states. Added png_ptr member io_state, and 2017 functions png_get_io_chunk_name() and png_get_io_state() in pngget.c 2018 (Cosmin). 2019 Added png_get_io_chunk_name and png_get_io_state to scripts/*.def (Cosmin). 2020 Renamed scripts/pngw32.* to scripts/pngwin.* (Cosmin). 2021 Removed the include directories and libraries from CFLAGS and LDFLAGS 2022 in scripts/makefile.gcc (Cosmin). 2023 Used png_save_uint_32() to set vpAg width and height in pngtest.c (Cosmin). 2024 Cast to proper type when getting/setting vpAg units in pngtest.c (Cosmin). 2025 Added pngintrn.h to the Visual C++ projects (Cosmin). 2026 Removed scripts/list (Cosmin). 2027 Updated copyright year in scripts/pngwin.def (Cosmin). 2028 Removed PNG_TYPECAST_NULL and used standard NULL consistently (Cosmin). 2029 Disallowed the user to redefine png_size_t, and enforced a consistent use 2030 of png_size_t across libpng (Cosmin). 2031 Changed the type of png_ptr->rowbytes, PNG_ROWBYTES() and friends 2032 to png_size_t (Cosmin). 2033 Removed png_convert_size() and replaced png_sizeof with sizeof (Cosmin). 2034 Removed some unnecessary type casts (Cosmin). 2035 Changed prototype of png_get_compression_buffer_size() and 2036 png_set_compression_buffer_size() to work with png_size_t instead of 2037 png_uint_32 (Cosmin). 2038 Removed png_memcpy_check() and png_memset_check() (Cosmin). 2039 Fixed a typo (png_byte --> png_bytep) in libpng.3 and libpng.txt (Cosmin). 2040 Clarified that png_zalloc() does not clear the allocated memory, 2041 and png_zalloc() and png_zfree() cannot be PNGAPI (Cosmin). 2042 Renamed png_mem_size_t to png_alloc_size_t, fixed its definition in 2043 pngconf.h, and used it in all memory allocation functions (Cosmin). 2044 Renamed pngintrn.h to pngpriv.h, added a comment at the top of the file 2045 mentioning that the symbols declared in that file are private, and 2046 updated the scripts and the Visual C++ projects accordingly (Cosmin). 2047 Removed circular references between pngconf.h and pngconf.h.in in 2048 scripts/makefile.vc*win32 (Cosmin). 2049 Removing trailing '.' from the warning and error messages (Cosmin). 2050 Added pngdefs.h that is built by makefile or configure, instead of 2051 pngconf.h.in (Glenn). 2052 Detect and fix attempt to write wrong iCCP profile length. 2053 2054Version 1.4.0beta12 [October 19, 2006] 2055 Changed "logical" to "bitwise" in the documentation. 2056 Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h 2057 Add a typecast to stifle compiler warning in pngrutil.c 2058 2059Version 1.4.0beta13 [November 10, 2006] 2060 Fix potential buffer overflow in sPLT chunk handler. 2061 Fix Makefile.am to not try to link to noexistent files. 2062 2063Version 1.4.0beta14 [November 15, 2006] 2064 Check all exported functions for NULL png_ptr. 2065 2066Version 1.4.0beta15 [November 17, 2006] 2067 Relocated two misplaced tests for NULL png_ptr. 2068 Built Makefile.in with automake-1.9.6 instead of 1.9.2. 2069 Build configure with autoconf-2.60 instead of 2.59 2070 Add "install: all" in Makefile.am so "configure; make install" will work. 2071 2072Version 1.4.0beta16 [November 17, 2006] 2073 Added a typecast in png_zalloc(). 2074 2075Version 1.4.0beta17 [December 4, 2006] 2076 Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c 2077 Add "png_bytep" typecast to profile while calculating length in pngwutil.c 2078 2079Version 1.4.0beta18 [December 7, 2006] 2080 Added scripts/CMakeLists.txt 2081 2082Version 1.4.0beta19 [May 16, 2007] 2083 Revised scripts/CMakeLists.txt 2084 Rebuilt configure and Makefile.in with newer tools. 2085 Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers. 2086 Added scripts/makefile.nommx 2087 2088Version 1.4.0beta20 [July 9, 2008] 2089 Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications 2090 calling set_unknown_chunk_location() need them. 2091 Moved several macro definitions from pngpriv.h to pngconf.h 2092 Merge with changes to the 1.2.X branch, as of 1.2.30beta04. 2093 Deleted all use of the MMX assembler code and Intel-licensed optimizations. 2094 Revised makefile.mingw 2095 2096Version 1.4.0beta21 [July 21, 2008] 2097 Moved local array "chunkdata" from pngrutil.c to the png_struct, so 2098 it will be freed by png_read_destroy() in case of a read error (Kurt 2099 Christensen). 2100 2101Version 1.4.0beta22 [July 21, 2008] 2102 Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking. 2103 2104Version 1.4.0beta23 [July 22, 2008] 2105 Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in 2106 png_decompress_chunk(). 2107 2108Version 1.4.0beta24 [July 25, 2008] 2109 Change all remaining "chunkdata" to "png_ptr->chunkdata" in 2110 png_decompress_chunk(), and remove "chunkdata" from parameter list. 2111 Put a call to png_check_chunk_name() in png_read_chunk_header(). 2112 Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte. 2113 Removed two calls to png_check_chunk_name() occurring later in the process. 2114 Define PNG_NO_ERROR_NUMBERS by default in pngconf.h 2115 2116Version 1.4.0beta25 [July 30, 2008] 2117 Added a call to png_check_chunk_name() in pngpread.c 2118 Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte. 2119 Added png_push_have_buffer() function to pngpread.c 2120 Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros. 2121 Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS. 2122 Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code. 2123 Synced contrib directory and configure files with libpng-1.2.30beta06. 2124 Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles) 2125 Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c 2126 2127Version 1.4.0beta26 [August 4, 2008] 2128 Removed png_push_have_buffer() function in pngpread.c. It increased the 2129 compiled library size slightly. 2130 Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta) 2131 Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings. 2132 Updated contrib/visupng/cexcept.h to version 2.0.1 2133 Added PNG_LITERAL_CHARACTER macros for #, [, and ]. 2134 2135Version 1.4.0beta27 [August 5, 2008] 2136 Revised usage of PNG_LITERAL_SHARP in pngerror.c. 2137 Moved newline character from individual png_debug messages into the 2138 png_debug macros. 2139 Allow user to #define their own png_debug, png_debug1, and png_debug2. 2140 2141Version 1.4.0beta28 [August 5, 2008] 2142 Revised usage of PNG_LITERAL_SHARP in pngerror.c. 2143 Added PNG_STRING_NEWLINE macro 2144 2145Version 1.4.0beta29 [August 9, 2008] 2146 Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers. 2147 Added PNG_STRING_COPYRIGHT macro. 2148 Added non-ISO versions of png_debug macros. 2149 2150Version 1.4.0beta30 [August 14, 2008] 2151 Added premultiplied alpha feature (Volker Wiendl). 2152 2153Version 1.4.0beta31 [August 18, 2008] 2154 Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c 2155 Removed extra crc check at the end of png_handle_cHRM(). Bug introduced 2156 in libpng-1.4.0beta20. 2157 2158Version 1.4.0beta32 [August 19, 2008] 2159 Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call. 2160 Revised PNG_NO_STDIO version of png_write_flush() 2161 2162Version 1.4.0beta33 [August 20, 2008] 2163 Added png_get|set_chunk_cache_max() to limit the total number of sPLT, 2164 text, and unknown chunks that can be stored. 2165 2166Version 1.4.0beta34 [September 6, 2008] 2167 Shortened tIME_string to 29 bytes in pngtest.c 2168 Fixed off-by-one error introduced in png_push_read_zTXt() function in 2169 libpng-1.2.30beta04/pngpread.c (Harald van Dijk) 2170 2171Version 1.4.0beta35 [October 6, 2008] 2172 Changed "trans_values" to "trans_color". 2173 Changed so-number from 0 to 14. Some OS do not like 0. 2174 Revised makefile.darwin to fix shared library numbering. 2175 Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8() 2176 in example.c (debian bug report) 2177 2178Version 1.4.0beta36 [October 25, 2008] 2179 Sync with tEXt vulnerability fix in libpng-1.2.33rc02. 2180 2181Version 1.4.0beta37 [November 13, 2008] 2182 Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c, 2183 and pngwrite.c 2184 2185Version 1.4.0beta38 [November 22, 2008] 2186 Added check for zero-area RGB cHRM triangle in png_check_cHRM() and 2187 png_check_cHRM_fixed(). 2188 2189Version 1.4.0beta39 [November 23, 2008] 2190 Revised png_warning() to write its message on standard output by default 2191 when warning_fn is NULL. 2192 2193Version 1.4.0beta40 [November 24, 2008] 2194 Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed(). 2195 In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant 2196 check for all-zero coordinates that is detected by the triangle check. 2197 2198Version 1.4.0beta41 [November 26, 2008] 2199 Fixed string vs pointer-to-string error in png_check_keyword(). 2200 Rearranged test expressions in png_check_cHRM_fixed() to avoid internal 2201 overflows. 2202 Added PNG_NO_CHECK_cHRM conditional. 2203 2204Version 1.4.0beta42, 43 [December 1, 2008] 2205 Merge png_debug with version 1.2.34beta04. 2206 2207Version 1.4.0beta44 [December 6, 2008] 2208 Removed redundant check for key==NULL before calling png_check_keyword() 2209 to ensure that new_key gets initialized and removed extra warning 2210 (Merge with version 1.2.34beta05 -- Arvan Pritchard). 2211 2212Version 1.4.0beta45 [December 9, 2008] 2213 In png_write_png(), respect the placement of the filler bytes in an earlier 2214 call to png_set_filler() (Jim Barry). 2215 2216Version 1.4.0beta46 [December 10, 2008] 2217 Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and 2218 PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated 2219 PNG_TRANSFORM_STRIP_FILLER (Jim Barry). 2220 2221Version 1.4.0beta47 [December 15, 2008] 2222 Support for dithering was disabled by default, because it has never 2223 been well tested and doesn't work very well. The code has not 2224 been removed, however, and can be enabled by building libpng with 2225 PNG_READ_DITHER_SUPPORTED defined. 2226 2227Version 1.4.0beta48 [February 14, 2009] 2228 Added new exported function png_calloc(). 2229 Combined several instances of png_malloc(); png_memset() into png_calloc(). 2230 Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24 2231 but was never defined. 2232 2233Version 1.4.0beta49 [February 28, 2009] 2234 Added png_fileno() macro to pngconf.h, used in pngwio.c 2235 Corrected order of #ifdef's in png_debug definition in png.h 2236 Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments 2237 for pcal_params. 2238 Fixed order of #ifdef directives in the png_debug defines in png.h 2239 (bug introduced in libpng-1.2.34/1.4.0beta29). 2240 Revised comments in png_set_read_fn() and png_set_write_fn(). 2241 2242Version 1.4.0beta50 [March 18, 2009] 2243 Use png_calloc() instead of png_malloc() to allocate big_row_buf when 2244 reading an interlaced file, to avoid a possible UMR. 2245 Undid revision of PNG_NO_STDIO version of png_write_flush(). Users 2246 having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined 2247 or supply their own flush_fn() replacement. 2248 Revised libpng*.txt and png.h documentation about use of png_write_flush() 2249 and png_set_write_fn(). 2250 Removed fflush() from pngtest.c. 2251 Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h 2252 2253Version 1.4.0beta51 [March 21, 2009] 2254 Removed new png_fileno() macro from pngconf.h . 2255 2256Version 1.4.0beta52 [March 27, 2009] 2257 Relocated png_do_chop() ahead of building gamma tables in pngrtran.c 2258 This avoids building 16-bit gamma tables unnecessarily. 2259 Removed fflush() from pngtest.c. 2260 Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h 2261 Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt 2262 2263Version 1.4.0beta53 [April 1, 2009] 2264 Removed some remaining MMX macros from pngpriv.h 2265 Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles) 2266 2267Version 1.4.0beta54 [April 13, 2009] 2268 Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow 2269 application code writers to bypass the check for multiple inclusion 2270 of setjmp.h when they know that it is safe to ignore the situation. 2271 Eliminated internal use of setjmp() in pngread.c and pngwrite.c 2272 Reordered ancillary chunks in pngtest.png to be the same as what 2273 pngtest now produces, and made some cosmetic changes to pngtest output. 2274 Eliminated deprecated png_read_init_3() and png_write_init_3() functions. 2275 2276Version 1.4.0beta55 [April 15, 2009] 2277 Simplified error handling in pngread.c and pngwrite.c by putting 2278 the new png_read_cleanup() and png_write_cleanup() functions inline. 2279 2280Version 1.4.0beta56 [April 25, 2009] 2281 Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress 2282 "shadowed declaration" warning from gcc-4.3.3. 2283 Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration" 2284 warning about a global "gamma" variable in math.h on some platforms. 2285 2286Version 1.4.0beta57 [May 2, 2009] 2287 Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24 2288 but was never defined (again). 2289 Rebuilt configure scripts with autoconf-2.63 instead of 2.62 2290 Removed pngprefs.h and MMX from makefiles 2291 2292Version 1.4.0beta58 [May 14, 2009] 2293 Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced 2294 in beta57). 2295 Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri) 2296 2297Version 1.4.0beta59 [May 15, 2009] 2298 Reformated sources in libpng style (3-space indentation, comment format) 2299 Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG) 2300 Added sections about the git repository and our coding style to the 2301 documentation 2302 Relocated misplaced #endif in pngwrite.c, sCAL chunk handler. 2303 2304Version 1.4.0beta60 [May 19, 2009] 2305 Conditionally compile png_read_finish_row() which is not used by 2306 progressive readers. 2307 Added contrib/pngminim/preader to demonstrate building minimal progressive 2308 decoder, based on contrib/gregbook with embedded libpng and zlib. 2309 2310Version 1.4.0beta61 [May 20, 2009] 2311 In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there 2312 is only one makefile in those directories, and revised the README files 2313 accordingly. 2314 More reformatting of comments, mostly to capitalize sentences. 2315 2316Version 1.4.0beta62 [June 2, 2009] 2317 Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h 2318 and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h 2319 Reformatted several remaining "else statement" into two lines. 2320 Added a section to the libpng documentation about using png_get_io_ptr() 2321 in configure scripts to detect the presence of libpng. 2322 2323Version 1.4.0beta63 [June 15, 2009] 2324 Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR() 2325 multiple times and to specify the sample order in the tRNS chunk, 2326 because the ISO PNG specification has a typo in the tRNS table. 2327 Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to 2328 PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism 2329 available for ignoring known chunks even when not saving unknown chunks. 2330 Adopted preference for consistent use of "#ifdef" and "#ifndef" versus 2331 "#if defined()" and "if !defined()" where possible. 2332 2333Version 1.4.0beta64 [June 24, 2009] 2334 Eliminated PNG_LEGACY_SUPPORTED code. 2335 Moved the various unknown chunk macro definitions outside of the 2336 PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks. 2337 2338Version 1.4.0beta65 [June 26, 2009] 2339 Added a reference to the libpng license in each file. 2340 2341Version 1.4.0beta66 [June 27, 2009] 2342 Refer to the libpng license instead of the libpng license in each file. 2343 2344Version 1.4.0beta67 [July 6, 2009] 2345 Relocated INVERT_ALPHA within png_read_png() and png_write_png(). 2346 Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB. 2347 Added an "xcode" project to the projects directory (Alam Arias). 2348 2349Version 1.4.0beta68 [July 19, 2009] 2350 Avoid some tests in filter selection in pngwutil.c 2351 2352Version 1.4.0beta69 [July 25, 2009] 2353 Simplified the new filter-selection test. This runs faster in the 2354 common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases. 2355 Removed extraneous declaration from the new call to png_read_gray_to_rgb() 2356 (bug introduced in libpng-1.4.0beta67). 2357 Fixed up xcode project (Alam Arias) 2358 Added a prototype for png_64bit_product() in png.c 2359 2360Version 1.4.0beta70 [July 27, 2009] 2361 Avoid a possible NULL dereference in debug build, in png_set_text_2(). 2362 (bug introduced in libpng-0.95, discovered by Evan Rouault) 2363 2364Version 1.4.0beta71 [July 29, 2009] 2365 Rebuilt configure scripts with autoconf-2.64. 2366 2367Version 1.4.0beta72 [August 1, 2009] 2368 Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec 2369 from <http://tukaani.org/xz>. 2370 2371Version 1.4.0beta73 [August 1, 2009] 2372 Reject attempt to write iCCP chunk with negative embedded profile length 2373 (JD Chen) (CVE-2009-5063). 2374 2375Version 1.4.0beta74 [August 8, 2009] 2376 Changed png_ptr and info_ptr member "trans" to "trans_alpha". 2377 2378Version 1.4.0beta75 [August 21, 2009] 2379 Removed an extra png_debug() recently added to png_write_find_filter(). 2380 Fixed incorrect #ifdef in pngset.c regarding unknown chunk support. 2381 2382Version 1.4.0beta76 [August 22, 2009] 2383 Moved an incorrectly located test in png_read_row() in pngread.c 2384 2385Version 1.4.0beta77 [August 27, 2009] 2386 Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt, 2387 and the "noconfig" files from the distribution. 2388 Moved CMakeLists.txt from scripts into the main libpng directory. 2389 Various bugfixes and improvements to CMakeLists.txt (Philip Lowman) 2390 2391Version 1.4.0beta78 [August 31, 2009] 2392 Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h 2393 Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros. 2394 Use png_malloc plus a loop instead of png_calloc() to initialize 2395 row_pointers in png_read_png(). 2396 2397Version 1.4.0beta79 [September 1, 2009] 2398 Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays. 2399 Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc(). 2400 2401Version 1.4.0beta80 [September 17, 2009] 2402 Removed scripts/libpng.icc 2403 Changed typecast of filler from png_byte to png_uint_16 in png_set_filler(). 2404 (Dennis Gustafsson) 2405 Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ") 2406 2407Version 1.4.0beta81 [September 23, 2009] 2408 Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h 2409 Expanded TAB characters in pngrtran.c 2410 Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid 2411 compiler complaints about doubly declaring things "const". 2412 Changed all "#if [!]defined(X)" to "if[n]def X" where possible. 2413 Eliminated unused png_ptr->row_buf_size 2414 2415Version 1.4.0beta82 [September 25, 2009] 2416 Moved redundant IHDR checking into new png_check_IHDR() in png.c 2417 and report all errors found in the IHDR data. 2418 Eliminated useless call to png_check_cHRM() from pngset.c 2419 2420Version 1.4.0beta83 [September 25, 2009] 2421 Revised png_check_IHDR() to eliminate bogus complaint about filter_type. 2422 2423Version 1.4.0beta84 [September 30, 2009] 2424 Fixed some inconsistent indentation in pngconf.h 2425 Revised png_check_IHDR() to add a test for width variable less than 32-bit. 2426 2427Version 1.4.0beta85 [October 1, 2009] 2428 Revised png_check_IHDR() again, to check info_ptr members instead of 2429 the contents of the returned parameters. 2430 2431Version 1.4.0beta86 [October 9, 2009] 2432 Updated the "xcode" project (Alam Arias). 2433 Eliminated a shadowed declaration of "pp" in png_handle_sPLT(). 2434 2435Version 1.4.0rc01 [October 19, 2009] 2436 Trivial cosmetic changes. 2437 2438Version 1.4.0beta87 [October 30, 2009] 2439 Moved version 1.4.0 back into beta. 2440 2441Version 1.4.0beta88 [October 30, 2009] 2442 Revised libpng*.txt section about differences between 1.2.x and 1.4.0 2443 because most of the new features have now been ported back to 1.2.41 2444 2445Version 1.4.0beta89 [November 1, 2009] 2446 More bugfixes and improvements to CMakeLists.txt (Philip Lowman) 2447 Removed a harmless extra png_set_invert_alpha() from pngwrite.c 2448 Apply png_user_chunk_cache_max within png_decompress_chunk(). 2449 Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate. 2450 2451Version 1.4.0beta90 [November 2, 2009] 2452 Removed all remaining WIN32_WCE #ifdefs except those involving the 2453 time.h "tm" structure 2454 2455Version 1.4.0beta91 [November 3, 2009] 2456 Updated scripts/pngw32.def and projects/wince/png32ce.def 2457 Copied projects/wince/png32ce.def to the scripts directory. 2458 Added scripts/makefile.wce 2459 Patched ltmain.sh for wince support. 2460 Added PNG_CONVERT_tIME_SUPPORTED macro. 2461 2462Version 1.4.0beta92 [November 4, 2009] 2463 Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED 2464 Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED 2465 Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead 2466 of differences from 1.2.41 to 1.4.0) 2467 2468Version 1.4.0beta93 [November 7, 2009] 2469 Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and 2470 PNG_ALLOCATED macros to detect deprecated direct access to the 2471 png_struct or info_struct members and other deprecated usage in 2472 applications (John Bowler). 2473 Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS, 2474 to prevent warnings about direct access to png structs by libpng 2475 functions while building libpng. They need to be tested, especially 2476 those using compilers other than gcc. 2477 Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG". 2478 They should work but still need to be updated to remove 2479 references to pnggccrd.c or pngvcrd.c and ASM building. 2480 Added README.txt to the beos, cbuilder5, netware, and xcode projects warning 2481 that they need to be updated, to remove references to pnggccrd.c and 2482 pngvcrd.c and to depend on pngpriv.h 2483 Removed three direct references to read_info_ptr members in pngtest.c 2484 that were detected by the new PNG_DEPSTRUCT macro. 2485 Moved the png_debug macro definitions and the png_read_destroy(), 2486 png_write_destroy() and png_far_to_near() prototypes from png.h 2487 to pngpriv.h (John Bowler) 2488 Moved the synopsis lines for png_read_destroy(), png_write_destroy() 2489 png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3. 2490 2491Version 1.4.0beta94 [November 9, 2009] 2492 Removed the obsolete, unused pnggccrd.c and pngvcrd.c files. 2493 Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions. 2494 Removed dependency of pngtest.o on pngpriv.h in the makefiles. 2495 Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined. 2496 2497Version 1.4.0beta95 [November 10, 2009] 2498 Changed png_check_sig() to !png_sig_cmp() in contrib programs. 2499 Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile 2500 Changed png_check_sig() to !png_sig_cmp() in contrib programs. 2501 Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c 2502 Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c 2503 Added dependency on pngpriv.h in contrib/pngminim/*/makefile 2504 2505Version 1.4.0beta96 [November 12, 2009] 2506 Renamed scripts/makefile.wce to scripts/makefile.cegcc 2507 Revised Makefile.am to use libpng.sys while building libpng.so 2508 so that only PNG_EXPORT functions are exported. 2509 Removed the deprecated png_check_sig() function/macro. 2510 Removed recently removed function names from scripts/*.def 2511 Revised pngtest.png to put chunks in the same order written by pngtest 2512 (evidently the same change made in libpng-1.0beta54 was lost). 2513 Added PNG_PRIVATE macro definition in pngconf.h for possible future use. 2514 2515Version 1.4.0beta97 [November 13, 2009] 2516 Restored pngtest.png to the libpng-1.4.0beta7 version. 2517 Removed projects/beos and netware.txt; no one seems to be supporting them. 2518 Revised Makefile.in 2519 2520Version 1.4.0beta98 [November 13, 2009] 2521 Added the "xcode" project to zip distributions, 2522 Fixed a typo in scripts/pngwin.def introduced in beta97. 2523 2524Version 1.4.0beta99 [November 14, 2009] 2525 Moved libpng-config.in and libpng.pc-configure.in out of the scripts 2526 directory, to libpng-config.in and libpng-pc.in, respectively, and 2527 modified Makefile.am and configure.ac accordingly. Now "configure" 2528 needs nothing from the "scripts" directory. 2529 Avoid redefining PNG_CONST in pngconf.h 2530 2531Version 1.4.0beta100 [November 14, 2009] 2532 Removed ASM builds from projects/visualc6 and projects/visualc71 2533 Removed scripts/makefile.nommx and makefile.vcawin32 2534 Revised CMakeLists.txt to account for new location of libpng-config.in 2535 and libpng-pc.in 2536 Updated INSTALL to reflect removal and relocation of files. 2537 2538Version 1.4.0beta101 [November 14, 2009] 2539 Restored the binary files (*.jpg, *.png, some project files) that were 2540 accidentally deleted from the zip and 7z distributions when the xcode 2541 project was added. 2542 2543Version 1.4.0beta102 [November 18, 2009] 2544 Added libpng-config.in and libpng-pc.in to the zip and 7z distributions. 2545 Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100. 2546 Moved descriptions of makefiles and other scripts out of INSTALL into 2547 scripts/README.txt 2548 Updated the copyright year in scripts/pngwin.rc from 2006 to 2009. 2549 2550Version 1.4.0beta103 [November 21, 2009] 2551 Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt 2552 Align row_buf on 16-byte boundary in memory. 2553 Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call 2554 to png_flush() after png_write_IEND(). See 1.4.0beta32, 1.4.0beta50 2555 changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES. Someone 2556 needs this feature. 2557 Make the 'png_jmpbuf' macro expand to a call that records the correct 2558 longjmp function as well as returning a pointer to the setjmp 2559 jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'. 2560 (John Bowler) 2561 2562Version 1.4.0beta104 [November 22, 2009] 2563 Removed png_longjmp_ptr from scripts/*.def and libpng.3 2564 Rebuilt configure scripts with autoconf-2.65 2565 2566Version 1.4.0beta105 [November 25, 2009] 2567 Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535() 2568 to accomplish alpha premultiplication when 2569 PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined. 2570 Changed "/255" to "/255.0" in background calculations to make it clear 2571 that the 255 is used as a double. 2572 2573Version 1.4.0beta106 [November 27, 2009] 2574 Removed premultiplied alpha feature. 2575 2576Version 1.4.0beta107 [December 4, 2009] 2577 Updated README 2578 Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files. 2579 Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects. 2580 Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco 2581 to put png.h and pngconf.h in $prefix/include, like the other scripts, 2582 instead of in $prefix/include/libpng. Also revised makefile.sco 2583 to put them in $prefix/include/libpng15 instead of in 2584 $prefix/include/libpng/libpng15. 2585 2586Version 1.4.0beta108 [December 11, 2009] 2587 Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile 2588 Relocated png_do_chop() to its original position in pngrtran.c; the 2589 change in version 1.2.41beta08 caused transparency to be handled wrong 2590 in some 16-bit datastreams (Yusaku Sugai). 2591 2592Version 1.4.0beta109 [December 13, 2009] 2593 Added "bit_depth" parameter to the private png_build_gamma_table() function. 2594 Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the 2595 PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit 2596 tables. 2597 2598Version 1.4.0rc02 [December 20, 2009] 2599 Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c 2600 2601Version 1.4.0rc03 [December 22, 2009] 2602 Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt 2603 (revising the change in 1.4.0beta99) 2604 2605Version 1.4.0rc04 [December 25, 2009] 2606 Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED 2607 in pngset.c to be consistent with other changes in version 1.2.38. 2608 2609Version 1.4.0rc05 [December 25, 2009] 2610 Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and 2611 Makefile.in to be consistent with changes in libpng-1.4.0rc03 2612 2613Version 1.4.0rc06 [December 29, 2009] 2614 Reverted the gamma_table changes from libpng-1.4.0beta109. 2615 Fixed some indentation errors. 2616 2617Version 1.4.0rc07 [January 1, 2010] 2618 Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences. 2619 Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c 2620 Update copyright year to 2010. 2621 2622Version 1.4.0rc08 [January 2, 2010] 2623 Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr 2624 in pngtest.c 2625 2626Version 1.4.0 [January 3, 2010] 2627 No changes. 2628 2629Version 1.4.1beta01 [January 8, 2010] 2630 Updated CMakeLists.txt for consistent indentation and to avoid an 2631 unclosed if-statement warning (Philip Lowman). 2632 Revised Makefile.am and Makefile.in to remove references to Y2KINFO, 2633 KNOWNBUG, and libpng.la (Robert Schwebel). 2634 Revised the makefiles to install the same files and symbolic 2635 links as configure, except for libpng.la and libpng14.la. 2636 Make png_set|get_compression_buffer_size() available even when 2637 PNG_WRITE_SUPPORTED is not enabled. 2638 Revised Makefile.am and Makefile.in to simplify their maintenance. 2639 Revised scripts/makefile.linux to install a link to libpng14.so.14.1 2640 2641Version 1.4.1beta02 [January 9, 2010] 2642 Revised the rest of the makefiles to install a link to libpng14.so.14.1 2643 2644Version 1.4.1beta03 [January 10, 2010] 2645 Removed png_set_premultiply_alpha() from scripts/*.def 2646 2647Version 1.4.1rc01 [January 16, 2010] 2648 No changes. 2649 2650Version 1.4.1beta04 [January 23, 2010] 2651 Revised png_decompress_chunk() to improve speed and memory usage when 2652 decoding large chunks. 2653 Added png_set|get_chunk_malloc_max() functions. 2654 2655Version 1.4.1beta05 [January 26, 2010] 2656 Relocated "int k" declaration in pngtest.c to minimize its scope. 2657 2658Version 1.4.1beta06 [January 28, 2010] 2659 Revised png_decompress_chunk() to use a two-pass method suggested by 2660 John Bowler. 2661 2662Version 1.4.1beta07 [February 6, 2010] 2663 Folded some long lines in the source files. 2664 Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX, 2665 and a PNG_USER_LIMITS_SUPPORTED flag. 2666 Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as 2667 png_ptr->png_user_chunk_malloc_max. 2668 Revised png_push_save_buffer() to do fewer but larger png_malloc() calls. 2669 2670Version 1.4.1beta08 [February 6, 2010] 2671 Minor cleanup and updating of dates and copyright year. 2672 2673Version 1.5.0beta01 [February 7, 2010] 2674 Moved declaration of png_struct into private pngstruct.h and png_info 2675 into pnginfo.h 2676 2677Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010] 2678 Reverted to original png_push_save_buffer() code. 2679 2680Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010] 2681 Return allocated "old_buffer" in png_push_save_buffer() before 2682 calling png_error(), to avoid a potential memory leak. 2683 Updated configure script to use SO number 15. 2684 2685Version 1.5.0beta04 [February 9, 2010] 2686 Removed malformed "incomplete struct declaration" of png_info from png.h 2687 2688Version 1.5.0beta05 [February 12, 2010] 2689 Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the 2690 linewrapping that it entailed. 2691 Revised comments in pngstruct.h and pnginfo.h and added pointers to 2692 the libpng license. 2693 Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES 2694 Removed the cbuilder5 project, which has not been updated to 1.4.0. 2695 2696Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010] 2697 Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke 2698 Nishikawa) 2699 2700Version 1.5.0beta07 [omitted] 2701 2702Version 1.5.0beta08 [February 19, 2010] 2703 Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED 2704 wherever png_snprintf() is used to construct error and warning messages. 2705 Noted in scripts/makefile.mingw that it expects to be run under MSYS. 2706 Removed obsolete unused MMX-querying support from contrib/gregbook 2707 Added exported png_longjmp() function. 2708 Removed the AIX redefinition of jmpbuf in png.h 2709 Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt 2710 when building on AIX. 2711 2712Version 1.5.0beta09 [February 19, 2010] 2713 Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt. 2714 Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h 2715 2716Version 1.5.0beta10 [February 25, 2010] 2717 Removed unused gzio.c from contrib/pngminim gather and makefile scripts 2718 Removed replacement error handlers from contrib/gregbook. Because of 2719 the new png_longjmp() function they are no longer needed. 2720 2721Version 1.5.0beta11 [March 6, 2010] 2722 Removed checking for already-included setjmp.h from pngconf.h 2723 Fixed inconsistent indentations and made numerous cosmetic changes. 2724 Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5 2725 2726Version 1.5.0beta12 [March 9, 2010] 2727 Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from 2728 the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES" 2729 and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler). 2730 Created new pngdebug.h and moved debug definitions there. 2731 2732Version 1.5.0beta13 [March 10, 2010] 2733 Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice. 2734 Revise the "#ifdef" blocks in png_inflate() so it will compile when neither 2735 PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED 2736 is defined. 2737 Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3 2738 Moved the 'config.h' support from pngconf.h to pngpriv.h 2739 Removed PNGAPI from the png_longjmp_ptr typedef. 2740 Eliminated dependence of pngtest.c on the private pngdebug.h file. 2741 Make all png_debug macros into *unterminated* statements or 2742 expressions (i.e. a trailing ';' must always be added) and correct 2743 the format statements in various png_debug messages. 2744 2745Version 1.5.0beta14 [March 14, 2010] 2746 Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c 2747 Revised Makefile.am to account for recent additions and replacements. 2748 Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and 2749 added ordinal numbers to the Windows DEF file and corrected the duplicated 2750 ordinal numbers on CE symbols that are commented out. 2751 Added back in export symbols that can be present in the Windows build but 2752 are disabled by default. 2753 PNG_EXPORT changed to include an 'ordinal' field for DEF file generation. 2754 PNG_CALLBACK added to make callback definitions uniform. PNGAPI split 2755 into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks), 2756 and appropriate changes made to all files. Cygwin builds re-hinged to 2757 allow procedure call standard changes and to remove the need for the DEF 2758 file (fixes build on Cygwin). 2759 Enabled 'attribute' warnings that are relevant to library APIs and callbacks. 2760 Changed rules for generation of the various symbol files and added a new 2761 rule for a DEF file (which is also added to the distribution). 2762 Updated the symbol file generation to stop it adding spurious spaces 2763 to EOL (coming from preprocessor macro expansion). Added a facility 2764 to join tokens in the output and rewrite *.dfn to use this. 2765 Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71 2766 and removed scripts/makefile.cygwin. 2767 Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built. 2768 Removed the include of sys/types.h - apparently unnecessary now on the 2769 platforms on which it happened (all but Mac OS and RISC OS). 2770 Moved the Mac OS test into pngpriv.h (the only place it is used.) 2771 2772Version 1.5.0beta15 [March 17, 2010] 2773 Added symbols.chk target to Makefile.am to validate the symbols in png.h 2774 against the new DEF file scripts/symbols.def. 2775 Changed the default DEF file back to pngwin.def. 2776 Removed makefile.mingw. 2777 Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN 2778 2779Version 1.5.0beta16 [April 1, 2010] 2780 Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that 2781 fields are initialized in all configurations. The READ/WRITE 2782 macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as 2783 before to disable code to actually read or write iTXt chunks 2784 and iTXt_SUPPORTED can be used to detect presence of either 2785 read or write support (but it is probably better to check for 2786 the one actually required - read or write.) 2787 Combined multiple png_warning() calls for a single error. 2788 Restored the macro definition of png_check_sig(). 2789 2790Version 1.5.0beta17 [April 17, 2010] 2791 Added some "(long)" typecasts to printf calls in png_handle_cHRM(). 2792 Documented the fact that png_set_dither() was disabled since libpng-1.4.0. 2793 Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect 2794 more accurately what it actually does. At the same time, renamed 2795 the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to 2796 PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS. 2797 Added some "(long)" typecasts to printf calls in png_handle_cHRM(). 2798 Freeze build-time only configuration in the build. 2799 In all prior versions of libpng most configuration options 2800 controlled by compiler #defines had to be repeated by the 2801 application code that used libpng. This patch changes this 2802 so that compilation options that can only be changed at build 2803 time are frozen in the build. Options that are compiler 2804 dependent (and those that are system dependent) are evaluated 2805 each time - pngconf.h holds these. Options that can be changed 2806 per-file in the application are in png.h. Frozen options are 2807 in the new installed header file pnglibconf.h (John Bowler) 2808 Removed the xcode project because it has not been updated to work 2809 with libpng-1.5.0. 2810 Removed the ability to include optional pngusr.h 2811 2812Version 1.5.0beta18 [April 17, 2010] 2813 Restored the ability to include optional pngusr.h 2814 Moved replacements for png_error() and png_warning() from the 2815 contrib/pngminim project to pngerror.c, for use when warnings or 2816 errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid 2817 storing unneeded error/warning text. 2818 Updated contrib/pngminim project to work with the new pnglibconf.h 2819 Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space. 2820 2821Version 1.5.0beta19 [April 24, 2010] 2822 Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions 2823 to read and write ints to be disabled independently of PNG_USE_READ_MACROS, 2824 which allows libpng to be built with the functions even though the default 2825 is to use the macros - this allows applications to choose at app build 2826 time whether or not to use macros (previously impossible because the 2827 functions weren't in the default build.) 2828 Changed Windows calling convention back to __cdecl for API functions. 2829 For Windows/x86 platforms only: 2830 __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses 2831 __cdecl throughout (both API functions and callbacks) on Windows/x86 2832 platforms. 2833 Replaced visualc6 and visualc71 projects with new vstudio project 2834 Relaxed the overly-restrictive permissions of some files. 2835 2836Version 1.5.0beta20 [April 24, 2010] 2837 Relaxed more overly-restrictive permissions of some files. 2838 2839Version 1.5.0beta21 [April 27, 2010] 2840 Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new 2841 vstudio project files, and some trivial editing of some files in the 2842 scripts directory. 2843 Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in 2844 contrib/pngminim/decoder/pngusr.h to make a smaller decoder application. 2845 2846Version 1.5.0beta22 [April 28, 2010] 2847 Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS 2848 because it has a macro equivalent. 2849 Improved the options.awk script; added an "everything off" option. 2850 Revised contrib/pngminim to use the "everything off" option in pngusr.dfa. 2851 2852Version 1.5.0beta23 [April 29, 2010] 2853 Corrected PNG_REMOVED macro to take five arguments. 2854 The macro was documented with two arguments (name,ordinal), however 2855 the symbol checking .dfn files assumed five arguments. The five 2856 argument form seems more useful so it is changed to that. 2857 Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED 2858 in gregbook/readpng2.c 2859 Corrected protection of png_get_user_transform_ptr. The API declaration in 2860 png.h is removed if both READ and WRITE USER_TRANSFORM are turned off 2861 but was left defined in pngtrans.c 2862 Added logunsupported=1 to cause pnglibconf.h to document disabled options. 2863 This makes the installed pnglibconf.h more readable but causes no 2864 other change. The intention is that users of libpng will find it 2865 easier to understand if an API they need is missing. 2866 Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined. 2867 Removed dummy_inflate.c from contrib/pngminim/encoder 2868 Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile. 2869 2870Version 1.5.0beta24 [May 7, 2010] 2871 Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the 2872 offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf. 2873 Added more blank lines for readability. 2874 2875Version 1.5.0beta25 [June 18, 2010] 2876 In pngpread.c: png_push_have_row() add check for new_row > height 2877 Removed the now-redundant check for out-of-bounds new_row from example.c 2878 2879Version 1.5.0beta26 [June 18, 2010] 2880 In pngpread.c: png_push_process_row() add check for too many rows. 2881 2882Version 1.5.0beta27 [June 18, 2010] 2883 Removed the check added in beta25 as it is now redundant. 2884 2885Version 1.5.0beta28 [June 20, 2010] 2886 Rewrote png_process_IDAT_data to consistently treat extra data as warnings 2887 and handle end conditions more cleanly. 2888 Removed the new (beta26) check in png_push_process_row(). 2889 2890Version 1.5.0beta29 [June 21, 2010] 2891 Revised scripts/options.awk to work on Sunos (but still doesn't work) 2892 Added comment to options.awk and contrib/pngminim/*/makefile to try nawk. 2893 2894Version 1.5.0beta30 [June 22, 2010] 2895 Stop memory leak when reading a malformed sCAL chunk. 2896 2897Version 1.5.0beta31 [June 26, 2010] 2898 Revised pngpread.c patch of beta28 to avoid an endless loop. 2899 Removed some trailing blanks. 2900 2901Version 1.5.0beta32 [June 26, 2010] 2902 Removed leftover scripts/options.patch and scripts/options.rej 2903 2904Version 1.5.0beta33 [July 6, 3010] 2905 Made FIXED and FLOATING options consistent in the APIs they enable and 2906 disable. Corrected scripts/options.awk to handle both command line 2907 options and options specified in the .dfa files. 2908 Changed char *msg to PNG_CONST char *msg in pngrutil.c 2909 Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or 2910 floating point APIs, but not both. 2911 Reversed patch to remove error handler when the jmp_buf is stored in the 2912 main program structure, not the png_struct. 2913 The error handler is needed because the default handler in libpng will 2914 always use the jmp_buf in the library control structure; this is never 2915 set. The gregbook code is a useful example because, even though it 2916 uses setjmp/longjmp, it shows how error handling can be implemented 2917 using control mechanisms not directly supported by libpng. The 2918 technique will work correctly with mechanisms such as Microsoft 2919 Structure Exceptions or C++ exceptions (compiler willing - note that gcc 2920 does not by default support interworking of C and C++ error handling.) 2921 Reverted changes to call png_longjmp in contrib/gregbook where it is not 2922 appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp 2923 cannot be used. 2924 Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans) 2925 Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {') 2926 2927Version 1.5.0beta34 [July 12, 2010] 2928 Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h 2929 2930Version 1.5.0beta35 [July 24, 2010] 2931 Removed some newly-added TAB characters. 2932 Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2 2933 Moved the definition of png_snprintf() outside of the enclosing 2934 #ifdef blocks in pngconf.h 2935 2936Version 1.5.0beta36 [July 29, 2010] 2937 Patches by John Bowler: 2938 Fixed point APIs are now supported throughout (no missing APIs). 2939 Internal fixed point arithmetic support exists for all internal floating 2940 point operations. 2941 sCAL validates the floating point strings it is passed. 2942 Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2 2943 Two new APIs exist to get the number of passes without turning on the 2944 PNG_INTERLACE transform and to get the number of rows in the current 2945 pass. 2946 A new test program, pngvalid.c, validates the gamma code. 2947 Errors in the 16-bit gamma correction (overflows) have been corrected. 2948 cHRM chunk testing is done consistently (previously the floating point 2949 API bypassed it, because the test really didn't work on FP, now the test 2950 is performed on the actual values to be stored in the PNG file so it 2951 works in the FP case too.) 2952 Most floating point APIs now simply call the fixed point APIs after 2953 converting the values to the fixed point form used in the PNG file. 2954 The standard headers no longer include zlib.h, which is currently only 2955 required for pngstruct.h and can therefore be internal. 2956 Revised png_get_int_32 to undo the PNG two's complement representation of 2957 negative numbers. 2958 2959Version 1.5.0beta37 [July 30, 2010] 2960 Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid 2961 a compiler warning. 2962 Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png 2963 2964Version 1.5.0beta38 [July 31, 2010] 2965 Implemented remaining "_fixed" functions. 2966 Corrected a number of recently introduced warnings mostly resulting from 2967 safe but uncast assignments to shorter integers. Also added a zlib 2968 VStudio release library project because the latest zlib Official Windows 2969 build does not include such a thing. 2970 Revised png_get_int_16() to be similar to png_get_int_32(). 2971 Restored projects/visualc71. 2972 2973Version 1.5.0beta39 [August 2, 2010] 2974 VisualC/GCC warning fixes, VisualC build fixes 2975 The changes include support for function attributes in VC in addition to 2976 those already present in GCC - necessary because without these some 2977 warnings are unavoidable. Fixes include signed/unsigned fixes in 2978 pngvalid and checks with gcc -Wall -Wextra -Wunused. 2979 VC requires function attributes on function definitions as well as 2980 declarations, PNG_FUNCTION has been added to enable this and the 2981 relevant function definitions changed. 2982 2983Version 1.5.0beta40 [August 6, 2010] 2984 Correct use of _WINDOWS_ in pngconf.h 2985 Removed png_mem_ #defines; they are no longer used. 2986 Added the sRGB chunk to pngtest.png 2987 2988Version 1.5.0beta41 [August 11, 2010] 2989 Added the cHRM chunk to pngtest.png 2990 Don't try to use version-script with cygwin/mingw. 2991 Revised contrib/gregbook to work under cygwin/mingw. 2992 2993Version 1.5.0beta42 [August 18, 2010] 2994 Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov) 2995 Made all API functions that have const arguments and constant string 2996 literal pointers declare them (John Bowler). 2997 2998Version 1.5.0beta43 [August 20, 2010] 2999 Removed spurious tabs, shorten long lines (no source change) 3000 Also added scripts/chkfmt to validate the format of all the files that can 3001 reasonably be validated (it is suggested to run "make distclean" before 3002 checking, because some machine generated files have long lines.) 3003 Reformatted the CHANGES file to be more consistent throughout. 3004 Made changes to address various issues identified by GCC, mostly 3005 signed/unsigned and shortening problems on assignment but also a few 3006 difficult to optimize (for GCC) loops. 3007 Fixed non-GCC fixed point builds. In png.c a declaration was misplaced 3008 in an earlier update. Fixed to declare the auto variables at the head. 3009 Use cexcept.h in pngvalid.c. 3010 3011Version 1.5.0beta44 [August 24, 2010] 3012 Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for 3013 installing libpng in /usr/lib64 (Funda Wang). 3014 Revised CMakeLists.txt to put the man pages in share/man/man* not man/man* 3015 Revised CMakeLists.txt to make symlinks instead of copies when installing. 3016 Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman) 3017 Implemented memory checks within pngvalid 3018 Reformatted/rearranged pngvalid.c to assist use of progressive reader. 3019 Check interlaced images in pngvalid 3020 Clarified pngusr.h comments in pnglibconf.dfa 3021 Simplified the pngvalid error-handling code now that cexcept.h is in place. 3022 Implemented progressive reader in pngvalid.c for standard tests 3023 Implemented progressive read in pngvalid.c gamma tests 3024 Turn on progressive reader in pngvalid.c by default and tidy code. 3025 3026Version 1.5.0beta45 [August 26, 2010] 3027 Added an explicit make step to projects/vstudio for pnglibconf.h 3028 Also corrected zlib.vcxproj into which Visual Studio had introduced 3029 what it calls an "authoring error". The change to make pnglibconf.h 3030 simply copies the file; in the future it may actually generate the 3031 file from scripts/pnglibconf.dfa as the other build systems do. 3032 Changed pngvalid to work when floating point APIs are disabled 3033 Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt 3034 Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX 3035 in pngpriv.h in case the user neglected to define them in their pngusr.h 3036 3037Version 1.5.0beta46 [August 28, 2010] 3038 Added new private header files to libpng_sources in CMakeLists.txt 3039 Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options. 3040 Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project. 3041 3042Version 1.5.0beta47 [September 11, 2010] 3043 Fixed a number of problems with 64-bit compilation reported by Visual 3044 Studio 2010 (John Bowler). 3045 3046Version 1.5.0beta48 [October 4, 2010] 3047 Updated CMakeLists.txt (Philip Lowman). 3048 Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER, 3049 $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE 3050 Fixed problem with symbols creation in Makefile.am which was assuming that 3051 all versions of ccp write to standard output by default (Martin Banky). The 3052 bug was introduced in libpng-1.2.9beta5. 3053 Removed unused mkinstalldirs. 3054 3055Version 1.5.0beta49 [October 8, 2010] 3056 Undid Makefile.am revision of 1.5.0beta48. 3057 3058Version 1.5.0beta50 [October 14, 2010] 3059 Revised Makefile.in to account for mkinstalldirs being removed. 3060 Added some "(unsigned long)" typecasts in printf statements in pngvalid.c. 3061 Suppressed a compiler warning in png_handle_sPLT(). 3062 Check for out-of-range text compression mode in png_set_text(). 3063 3064Version 1.5.0beta51 [October 15, 2010] 3065 Changed embedded dates to "(PENDING RELEASE) in beta releases (and future 3066 rc releases) to minimize the difference between releases. 3067 3068Version 1.5.0beta52 [October 16, 2010] 3069 Restored some of the embedded dates (in png.h, png.c, documentation, etc.) 3070 3071Version 1.5.0beta53 [October 18, 2010] 3072 Updated INSTALL to mention using "make maintainer-clean" and to remove 3073 obsolete statement about a custom ltmain.sh 3074 Disabled "color-tests" by default in Makefile.am so it will work with 3075 automake versions earlier than 1.11.1 3076 Use document name "libpng-manual.txt" instead of "libpng-<version>.txt" 3077 to simplify version differences. 3078 Removed obsolete remarks about setjmp handling from INSTALL. 3079 Revised and renamed the typedef in png.h and png.c that was designed 3080 to catch library and header mismatch. 3081 3082Version 1.5.0beta54 [November 10, 2010] 3083 Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks. 3084 Used a consistent structure for the pngget.c functions. 3085 3086Version 1.5.0beta55 [November 21, 2010] 3087 Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin) 3088 Moved reading of file signature into png_read_sig (Cosmin) 3089 Fixed atomicity of chunk header serialization (Cosmin) 3090 Added test for io_state in pngtest.c (Cosmin) 3091 Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts. 3092 Changes to remove gcc warnings (John Bowler) 3093 Certain optional gcc warning flags resulted in warnings in libpng code. 3094 With these changes only -Wconversion and -Wcast-qual cannot be turned on. 3095 Changes are trivial rearrangements of code. -Wconversion is not possible 3096 for pngrutil.c (because of the widespread use of += et al on variables 3097 smaller than (int) or (unsigned int)) and -Wcast-qual is not possible 3098 with pngwio.c and pngwutil.c because the 'write' callback and zlib 3099 compression both fail to declare their input buffers with 'const'. 3100 3101Version 1.5.0beta56 [December 7, 2010] 3102 Added the private PNG_UNUSED() macro definition in pngpriv.h. 3103 Added some commentary about PNG_EXPORT in png.h and pngconf.h 3104 Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the 3105 objective of simplifying and improving the cosmetic appearance of png.h. 3106 Fixed some incorrect "=" macro names in pnglibconf.dfa 3107 Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt 3108 3109Version 1.5.0beta57 [December 9, 2010] 3110 Documented the pngvalid gamma error summary with additional comments and 3111 print statements. 3112 Improved missing symbol handling in checksym.awk; symbols missing in both 3113 the old and new files can now be optionally ignored, treated as errors 3114 or warnings. 3115 Removed references to pngvcrd.c and pnggccrd.c from the vstudio project. 3116 Updated "libpng14" to "libpng15" in the visualc71 project. 3117 Enabled the strip16 tests in pngvalid.` 3118 Don't display test results (except PASS/FAIL) when running "make test". 3119 Instead put them in pngtest-log.txt 3120 Added "--with-zprefix=<string>" to configure.ac 3121 Updated the prebuilt configuration files to autoconf version 2.68 3122 3123Version 1.5.0beta58 [December 19, 2010] 3124 Fixed interlace image handling and add test cases (John Bowler) 3125 Fixed the clean rule in Makefile.am to remove pngtest-log.txt 3126 Made minor changes to work around warnings in gcc 3.4 3127 3128Version 1.5.0rc01 [December 27, 2010] 3129 No changes. 3130 3131Version 1.5.0rc02 [December 27, 2010] 3132 Eliminated references to the scripts/*.def files in project/visualc71. 3133 3134Version 1.5.0rc03 [December 28, 2010] 3135 Eliminated scripts/*.def and revised Makefile.am accordingly 3136 3137Version 1.5.0rc04 [December 29, 2010] 3138 Fixed bug in background transformation handling in pngrtran.c (it was 3139 looking for the flag in png_ptr->transformations instead of in 3140 png_ptr->flags) (David Raymond). 3141 3142Version 1.5.0rc05 [December 31, 2010] 3143 Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin) 3144 3145Version 1.5.0rc06 [January 4, 2011] 3146 Changed the new configure option "zprefix=string" to "zlib-prefix=string" 3147 3148Version 1.5.0rc07 [January 4, 2011] 3149 Updated copyright year. 3150 3151Version 1.5.0 [January 6, 2011] 3152 No changes. 3153 3154version 1.5.1beta01 [January 8, 2011] 3155 Added description of png_set_crc_action() to the manual. 3156 Added a note in the manual that the type of the iCCP profile was changed 3157 from png_charpp to png_bytepp in png_get_iCCP(). This change happened 3158 in version 1.5.0beta36 but is not noted in the CHANGES. Similarly, 3159 it was changed from png_charpp to png_const_bytepp in png_set_iCCP(). 3160 Ensure that png_rgb_to_gray ignores palette mapped images, if libpng 3161 internally happens to call it with one, and fixed a failure to handle 3162 palette mapped images correctly. This fixes CVE-2690. 3163 3164Version 1.5.1beta02 [January 14, 2011] 3165 Fixed a bug in handling of interlaced images (bero at arklinux.org). 3166 Updated CMakeLists.txt (Clifford Yapp) 3167 3168Version 1.5.1beta03 [January 14, 2011] 3169 Fixed typecasting of some png_debug() statements (Cosmin) 3170 3171Version 1.5.1beta04 [January 16, 2011] 3172 Updated documentation of png_set|get_tRNS() (Thomas Klausner). 3173 Mentioned in the documentation that applications must #include "zlib.h" 3174 if they need access to anything in zlib.h, and that a number of 3175 macros such as png_memset() are no longer accessible by applications. 3176 Corrected pngvalid gamma test "sample" function to access all of the color 3177 samples of each pixel, instead of sampling the red channel three times. 3178 Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow" 3179 warnings, and (mistakenly) changed png_exp() to exp(). 3180 3181Version 1.5.1beta05 [January 16, 2011] 3182 Changed variable names png_index, png_div, png_exp, and png_gamma to 3183 char_index, divisor, exp_b10, and gamma_val, respectively, and 3184 changed exp() back to png_exp(). 3185 3186Version 1.5.1beta06 [January 20, 2011] 3187 Prevent png_push_crc_skip() from hanging while reading an unknown chunk 3188 or an over-large compressed zTXt chunk with the progressive reader. 3189 Eliminated more GCC "shadow" warnings. 3190 Revised png_fixed() in png.c to avoid compiler warning about reaching the 3191 end without returning anything. 3192 3193Version 1.5.1beta07 [January 22, 2011] 3194 In the manual, describe the png_get_IHDR() arguments in the correct order. 3195 Added const_png_structp and const_png_infop types, and used them in 3196 prototypes for most png_get_*() functions. 3197 3198Version 1.5.1beta08 [January 23, 2011] 3199 Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name() 3200 Added synopses for the IO_STATE functions and other missing synopses 3201 to the manual. Removed the synopses from libpngpf.3 because they 3202 were out of date and no longer useful. Better information can be 3203 obtained by reading the prototypes and comments in pngpriv.h 3204 Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build 3205 Added a make macro DFNCPP that is a CPP that will accept the tokens in 3206 a .dfn file and adds configure stuff to test for such a CPP. ./configure 3207 should fail if one is not available. 3208 Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace. 3209 Added png_get_current_row_number and png_get_current_pass_number for the 3210 benefit of the user transform callback. 3211 Added png_process_data_pause and png_process_data_skip for the benefit of 3212 progressive readers that need to stop data processing or want to optimize 3213 skipping of unread data (e.g., if the reader marks a chunk to be skipped.) 3214 3215Version 1.5.1beta09 [January 24, 2011] 3216 Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error. 3217 pngvalid contains tests of transforms, which tests are currently disabled 3218 because they are incompletely tested. gray_to_rgb was failing to expand 3219 the bit depth for smaller bit depth images; this seems to be a long 3220 standing error and resulted, apparently, in invalid output 3221 (CVE-2011-0408, CERT VU#643140). The documentation did not accurately 3222 describe what libpng really does when converting RGB to gray. 3223 3224Version 1.5.1beta10 [January 27, 2010] 3225 Fixed incorrect examples of callback prototypes in the manual, that were 3226 introduced in libpng-1.0.0. 3227 In addition the order of the png_get_uint macros with respect to the 3228 relevant function definitions has been reversed. This helps the 3229 preprocessing of the symbol files be more robust. Furthermore, the 3230 symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when 3231 the library may actually be built with PNG_USE_READ_MACROS; this stops 3232 the read macros interfering with the symbol file format. 3233 Made the manual, synopses, and function prototypes use the function 3234 argument names file_gamma, int_file_gamma, and srgb_intent consistently. 3235 3236Version 1.5.1beta11 [January 28, 2011] 3237 Changed PNG_UNUSED from "param=param;" to "{if(param){}}". 3238 Corrected local variable type in new API png_process_data_skip() 3239 The type was self-evidently incorrect but only causes problems on 64-bit 3240 architectures. 3241 Added transform tests to pngvalid and simplified the arguments. 3242 3243Version 1.5.1rc01 [January 29, 2011] 3244 No changes. 3245 3246Version 1.5.1rc02 [January 31, 2011] 3247 Added a request in the manual that applications do not use "png_" or 3248 "PNG_" to begin any of their own symbols. 3249 Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h 3250 3251Version 1.5.1 [February 3, 2011] 3252 No changes. 3253 3254Version 1.5.2beta01 [February 13, 2011] 3255 More -Wshadow fixes for older gcc compilers. Older gcc versions apparently 3256 check formal parameters names in function declarations (as well as 3257 definitions) to see if they match a name in the global namespace. 3258 Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the 3259 old VisualC++ preprocessor. 3260 Turned on interlace handling in png_read_png(). 3261 Fixed gcc pedantic warnings. 3262 Handle longjmp in Cygwin. 3263 Fixed png_get_current_row_number() in the interlaced case. 3264 Cleaned up ALPHA flags and transformations. 3265 Implemented expansion to 16 bits. 3266 3267Version 1.5.2beta02 [February 19, 2011] 3268 Fixed mistake in the descriptions of user read_transform and write_transform 3269 function prototypes in the manual. The row_info struct is png_row_infop. 3270 Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior. 3271 Corrected png_get_current_row_number documentation 3272 Fixed the read/write row callback documentation. 3273 This documents the current behavior, where the callback is called after 3274 every row with information pertaining to the next row. 3275 3276Version 1.5.2beta03 [March 3, 2011] 3277 Fixed scripts/makefile.vcwin32 3278 Updated contrib/pngsuite/README to add the word "modify". 3279 Define PNG_ALLOCATED to blank when _MSC_VER<1300. 3280 3281Version 1.5.2rc01 [March 19, 2011] 3282 Define remaining attributes to blank when MSC_VER<1300. 3283 ifdef out mask arrays in pngread.c when interlacing is not supported. 3284 3285Version 1.5.2rc02 [March 22, 2011] 3286 Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak 3287 and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip" 3288 from the makefiles. 3289 Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail 3290 to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill) 3291 3292Version 1.5.2rc03 [March 24, 2011] 3293 Don't include standard header files in png.h while building the symbol table, 3294 to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro). 3295 3296Version 1.5.2 [March 31, 2011] 3297 No changes. 3298 3299Version 1.5.3beta01 [April 1, 2011] 3300 Re-initialize the zlib compressor before compressing non-IDAT chunks. 3301 Added API functions (png_set_text_compression_level() and four others) to 3302 set parameters for zlib compression of non-IDAT chunks. 3303 3304Version 1.5.3beta02 [April 3, 2011] 3305 Updated scripts/symbols.def with new API functions. 3306 Only compile the new zlib re-initializing code when text or iCCP is 3307 supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro. 3308 Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03). 3309 Optimize the zlib CMF byte in non-IDAT compressed chunks 3310 3311Version 1.5.3beta03 [April 16, 2011] 3312 Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have 3313 snprintf, and the "__STRICT_ANSI__" detects that condition more reliably 3314 than __STDC__ (John Bowler). 3315 Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells 3316 the compiler that a user supplied callback (the error handler) does not 3317 return, yet there is no guarantee in practice that the application code 3318 will correctly implement the error handler because the compiler only 3319 issues a warning if there is a mistake (John Bowler). 3320 Removed the no-longer-used PNG_DEPSTRUCT macro. 3321 Updated the zlib version to 1.2.5 in the VStudio project. 3322 Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in 3323 pngwutil.c (John Bowler). 3324 Fixed bug with stripping the filler or alpha channel when writing, that 3325 was introduced in libpng-1.5.2beta01 (bug report by Andrew Church). 3326 3327Version 1.5.3beta04 [April 27, 2011] 3328 Updated pngtest.png with the new zlib CMF optimization. 3329 Cleaned up conditional compilation code and of background/gamma handling 3330 Internal changes only except a new option to avoid compiling the 3331 png_build_grayscale_palette API (which is not used at all internally.) 3332 The main change is to move the transform tests (READ_TRANSFORMS, 3333 WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids 3334 calls to spurious functions if all transforms are disabled and slightly 3335 simplifies those functions. Pngvalid modified to handle this. 3336 A minor change is to stop the strip_16 and expand_16 interfaces from 3337 disabling each other; this allows the future alpha premultiplication 3338 code to use 16-bit intermediate values while still producing 8-bit output. 3339 png_do_background and png_do_gamma have been simplified to take a single 3340 pointer to the png_struct rather than pointers to every item required 3341 from the png_struct. This makes no practical difference to the internal 3342 code. 3343 A serious bug in the pngvalid internal routine 'standard_display_init' has 3344 been fixed - this failed to initialize the red channel and accidentally 3345 initialized the alpha channel twice. 3346 Changed png_struct jmp_buf member name from png_jmpbuf to tmp_jmpbuf to 3347 avoid a possible clash with the png_jmpbuf macro on some platforms. 3348 3349Version 1.5.3beta05 [May 6, 2011] 3350 Added the "_POSIX_SOURCE" feature test macro to ensure libpng sees the 3351 correct API. _POSIX_SOURCE is defined in pngpriv.h, pngtest.c and 3352 pngvalid.c to ensure that POSIX conformant systems disable non-POSIX APIs. 3353 Removed png_snprintf and added formatted warning messages. This change adds 3354 internal APIs to allow png_warning messages to have parameters without 3355 requiring the host OS to implement snprintf. As a side effect the 3356 dependency of the tIME-supporting RFC1132 code on stdio is removed and 3357 PNG_NO_WARNINGS does actually work now. 3358 Pass "" instead of '\0' to png_default_error() in png_err(). This mistake 3359 was introduced in libpng-1.2.20beta01. This fixes CVE-2011-2691. 3360 Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte 3361 optimization configurable. 3362 IDAT compression failed if preceded by a compressed text chunk (bug 3363 introduced in libpng-1.5.3beta01-02). This was because the attempt to 3364 reset the zlib stream in png_write_IDAT happened after the first IDAT 3365 chunk had been deflated - much too late. In this change internal 3366 functions were added to claim/release the z_stream and, hopefully, make 3367 the code more robust. Also deflateEnd checking is added - previously 3368 libpng would ignore an error at the end of the stream. 3369 3370Version 1.5.3beta06 [May 8, 2011] 3371 Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt 3372 Implemented premultiplied alpha support: png_set_alpha_mode API 3373 3374Version 1.5.3beta07 [May 11, 2011] 3375 Added expand_16 support to the high level interface. 3376 Added named value and 'flag' gamma support to png_set_gamma. Made a minor 3377 change from the previous (unreleased) ABI/API to hide the exact value used 3378 for Macs - it's not a good idea to embed this in the ABI! 3379 Moved macro definitions for PNG_HAVE_IHDR, PNG_HAVE_PLTE, and PNG_AFTER_IDAT 3380 from pngpriv.h to png.h because they must be visible to applications 3381 that call png_set_unknown_chunks(). 3382 Check for up->location !PNG_AFTER_IDAT when writing unknown chunks 3383 before IDAT. 3384 3385Version 1.5.3beta08 [May 16, 2011] 3386 Improved "pngvalid --speed" to exclude more of pngvalid from the time. 3387 Documented png_set_alpha_mode(), other changes in libpng.3/libpng-manual.txt 3388 The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative 3389 parameters are supplied by the caller), while in the absence of cHRM 3390 sRGB/Rec 709 values are still used. This introduced a divide-by-zero 3391 bug in png_handle_cHRM(). 3392 The bKGD chunk no longer overwrites the background value set by 3393 png_set_background(), allowing the latter to be used before the file 3394 header is read. It never performed any useful function to override 3395 the default anyway. 3396 Added memory overwrite and palette image checks to pngvalid.c 3397 Previously palette image code was poorly checked. Since the transformation 3398 code has a special palette path in most cases this was a severe weakness. 3399 Minor cleanup and some extra checking in pngrutil.c and pngrtran.c. When 3400 expanding an indexed image, always expand to RGBA if transparency is 3401 present. 3402 3403Version 1.5.3beta09 [May 17, 2011] 3404 Reversed earlier 1.5.3 change of transformation order; move png_expand_16 3405 back where it was. The change doesn't work because it requires 16-bit 3406 gamma tables when the code only generates 8-bit ones. This fails 3407 silently; the libpng code just doesn't do any gamma correction. Moving 3408 the tests back leaves the old, inaccurate, 8-bit gamma calculations, but 3409 these are clearly better than none! 3410 3411Version 1.5.3beta10 [May 20, 2011] 3412 3413 png_set_background() and png_expand_16() did not work together correctly. 3414 This problem is present in 1.5.2; if png_set_background is called with 3415 need_expand false and the matching 16 bit color libpng erroneously just 3416 treats it as an 8-bit color because of where png_do_expand_16 is in the 3417 transform list. This simple fix reduces the supplied colour to 8-bits, 3418 so it gets smashed, but this is better than the current behavior. 3419 Added tests for expand16, more fixes for palette image tests to pngvalid. 3420 Corrects the code for palette image tests and disables attempts to 3421 validate palette colors. 3422 3423Version 1.5.3rc01 [June 3, 2011] 3424 No changes. 3425 3426Version 1.5.3rc02 [June 8, 2011] 3427 Fixed uninitialized memory read in png_format_buffer() (Bug report by 3428 Frank Busse, CVE-2011-2501, related to CVE-2004-0421). 3429 3430Version 1.5.3beta11 [June 11, 2011] 3431 Fixed png_handle_sCAL which is broken in 1.5. This fixes CVE 2011-2692. 3432 Added sCAL to pngtest.png 3433 Revised documentation about png_set_user_limits() to say that it also affects 3434 png writing. 3435 Revised handling of png_set_user_limits() so that it can increase the 3436 limit beyond the PNG_USER_WIDTH|HEIGHT_MAX; previously it could only 3437 reduce it. 3438 Make the 16-to-8 scaling accurate. Dividing by 256 with no rounding is 3439 wrong (high by one) 25% of the time. Dividing by 257 with rounding is 3440 wrong in 128 out of 65536 cases. Getting the right answer all the time 3441 without division is easy. 3442 Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro. 3443 Added projects/owatcom, an IDE project for OpenWatcom to replace 3444 scripts/makefile.watcom. This project works with OpenWatcom 1.9. The 3445 IDE autogenerates appropriate makefiles (libpng.mk) for batch processing. 3446 The project is configurable, unlike the Visual Studio project, so long 3447 as the developer has an awk. 3448 Changed png_set_gAMA to limit the gamma value range so that the inverse 3449 of the stored value cannot overflow the fixed point representation, 3450 and changed other things OpenWatcom warns about. 3451 Revised pngvalid.c to test PNG_ALPHA_MODE_SUPPORTED correctly. This allows 3452 pngvalid to build when ALPHA_MODE is not supported, which is required if 3453 it is to build on libpng 1.4. 3454 Removed string/memory macros that are no longer used and are not 3455 necessarily fully supportable, particularly png_strncpy and png_snprintf. 3456 Added log option to pngvalid.c and attempted to improve gamma messages. 3457 3458Version 1.5.3 [omitted] 3459 People found the presence of a beta release following an rc release 3460 to be confusing; therefore we bump the version to libpng-1.5.4beta01 3461 and there will be no libpng-1.5.3 release. 3462 3463Version 1.5.4beta01 [June 14, 2011] 3464 Made it possible to undefine PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED 3465 to get the same (inaccurate) output as libpng-1.5.2 and earlier. 3466 Moved definitions of PNG_HAVE_IHDR, PNG_AFTER_IDAT, and PNG_HAVE_PLTE 3467 outside of an unknown-chunk block in png.h because they are also 3468 needed for other uses. 3469 3470Version 1.5.4beta02 [June 14, 2011] 3471 Fixed and clarified LEGACY 16-to-8 scaling code. 3472 Added png_set_chop_16() API, to match inaccurate results from previous 3473 libpng versions. 3474 Removed the ACCURATE and LEGACY options (they are no longer useable) 3475 Use the old scaling method for background if png_set_chop_16() was 3476 called. 3477 Made png_set_chop_16() API removeable by disabling PNG_CHOP_16_TO_8_SUPPORTED 3478 3479Version 1.5.4beta03 [June 15, 2011] 3480 Fixed a problem in png_do_expand_palette() exposed by optimization in 3481 1.5.3beta06 3482 Also removed a spurious and confusing "trans" member ("trans") from png_info. 3483 The palette expand optimization prevented expansion to an intermediate RGBA 3484 form if tRNS was present but alpha was marked to be stripped; this exposed 3485 a check for tRNS in png_do_expand_palette() which is inconsistent with the 3486 code elsewhere in libpng. 3487 Correction to the expand_16 code; removed extra instance of 3488 png_set_scale_16_to_8 from pngpriv.h 3489 3490Version 1.5.4beta04 [June 16, 2011] 3491 Added a missing "#ifdef PNG_READ_BACKGROUND_SUPPORTED/#endif" in pngrtran.c 3492 Added PNG_TRANSFORM_CHOP_16 to the high-level read transforms. 3493 Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again. If this is 3494 not enabled, png_set_strip_16() and png_do_scale_16_to_8() aren't built. 3495 Revised contrib/visupng, gregbook, and pngminim to demonstrate chop_16_to_8 3496 3497Version 1.5.4beta05 [June 16, 2011] 3498 Renamed png_set_strip_16() to png_set_scale_16() and renamed 3499 png_set_chop_16() to png_set_strip(16) in an attempt to minimize the 3500 behavior changes between libpng14 and libpng15. 3501 3502Version 1.5.4beta06 [June 18, 2011] 3503 Fixed new bug that was causing both strip_16 and scale_16 to be applied. 3504 3505Version 1.5.4beta07 [June 19, 2011] 3506 Fixed pngvalid, simplified macros, added checking for 0 in sCAL. 3507 The ACCURATE scale macro is no longer defined in 1.5 - call the 3508 png_scale_16_to_8 API. Made sure that PNG_READ_16_TO_8 is still defined 3509 if the png_strip_16_to_8 API is present. png_check_fp_number now 3510 maintains some state so that positive, negative and zero values are 3511 identified. sCAL uses these to be strictly spec conformant. 3512 3513Version 1.5.4beta08 [June 23, 2011] 3514 Fixed pngvalid if ACCURATE_SCALE is defined. 3515 Updated scripts/pnglibconf.h.prebuilt. 3516 3517Version 1.5.4rc01 [June 30, 2011] 3518 Define PNG_ALLOCATED to "restrict" only if MSC_VER >= 1400. 3519 3520Version 1.5.4 [July 7, 2011] 3521 No changes. 3522 3523Version 1.5.5beta01 [July 13, 2011] 3524 Fixed some typos and made other minor changes in the manual. 3525 Updated contrib/pngminus/makefile.std (Samuli Souminen) 3526 3527Version 1.5.5beta02 [July 14, 2011] 3528 Revised Makefile.am and Makefile.in to look in the right directory for 3529 pnglibconf.h.prebuilt 3530 3531Version 1.5.5beta03 [July 27, 2011] 3532 Enabled compilation with g++ compiler. This compiler does not recognize 3533 the file extension, so it always compiles with C++ rules. Made minor 3534 changes to pngrutil.c to cast results where C++ expects it but C does not. 3535 Minor editing of libpng.3 and libpng-manual.txt. 3536 3537Version 1.5.5beta04 [July 29, 2011] 3538 Revised CMakeLists.txt (Clifford Yapp) 3539 Updated commentary about the png_rgb_to_gray() default coefficients 3540 in the manual and in pngrtran.c 3541 3542Version 1.5.5beta05 [August 17, 2011] 3543 Prevent unexpected API exports from non-libpng DLLs on Windows. The "_DLL" 3544 is removed from the test of whether a DLL is being built (this erroneously 3545 caused the libpng APIs to be marked as DLL exports in static builds under 3546 Microsoft Visual Studio). Almost all of the libpng building configuration 3547 is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in 3548 pngconf.h, though, so that it is colocated with the import definition (it 3549 is no longer used anywhere in the installed headers). The VStudio project 3550 definitions have been cleaned up: "_USRDLL" has been removed from the 3551 static library builds (this was incorrect), and PNG_USE_DLL has been added 3552 to pngvalid to test the functionality (pngtest does not supply it, 3553 deliberately). The spurious "_EXPORTS" has been removed from the 3554 libpng build (all these errors were a result of copy/paste between project 3555 configurations.) 3556 Added new types and internal functions for CIE RGB end point handling to 3557 pngpriv.h (functions yet to be implemented). 3558 3559Version 1.5.5beta06 [August 26, 2011] 3560 Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set in CMakeLists.txt 3561 (Clifford Yap) 3562 Fixes to rgb_to_gray and cHRM XYZ APIs (John Bowler): 3563 The rgb_to_gray code had errors when combined with gamma correction. 3564 Some pixels were treated as true grey when they weren't and such pixels 3565 and true grey ones were not gamma corrected (the original value of the 3566 red component was used instead). APIs to get and set cHRM using color 3567 space end points have been added and the rgb_to_gray code that defaults 3568 based on cHRM, and the divide-by-zero bug in png_handle_cHRM (CERT 3569 VU#477046, CVE-2011-3328, introduced in 1.5.4) have been corrected. 3570 A considerable number of tests has been added to pngvalid for the 3571 rgb_to_gray transform. 3572 Arithmetic errors in rgb_to_gray whereby the calculated gray value was 3573 truncated to the bit depth rather than rounded have been fixed except in 3574 the 8-bit non-gamma-corrected case (where consistency seems more important 3575 than correctness.) The code still has considerable inaccuracies in the 3576 8-bit case because 8-bit linear arithmetic is used. 3577 3578Version 1.5.5beta07 [September 7, 2011] 3579 Added "$(ARCH)" option to makefile.darwin 3580 Added SunOS support to configure.ac and Makefile.am 3581 Changed png_chunk_benign_error() to png_warning() in png.c, in 3582 png_XYZ_from_xy_checked(). 3583 3584Version 1.5.5beta08 [September 10, 2011] 3585 Fixed 64-bit compilation errors (gcc). The errors fixed relate 3586 to conditions where types that are 32 bits in the GCC 32-bit 3587 world (uLong and png_size_t) become 64 bits in the 64-bit 3588 world. This produces potential truncation errors which the 3589 compiler correctly flags. 3590 Relocated new HAVE_SOLARIS_LD definition in configure.ac 3591 Constant changes for 64-bit compatibility (removal of L suffixes). The 3592 16-bit cases still use "L" as we don't have a 16-bit test system. 3593 3594Version 1.5.5rc01 [September 15, 2011] 3595 Removed "L" suffixes in pngpriv.h 3596 3597Version 1.5.5 [September 22, 2011] 3598 No changes. 3599 3600Version 1.5.6beta01 [September 22, 2011] 3601 Fixed some 64-bit type conversion warnings in pngrtran.c 3602 Moved row_info from png_struct to a local variable. 3603 The various interlace mask arrays have been made into arrays of 3604 bytes and made PNG_CONST and static (previously some arrays were 3605 marked PNG_CONST and some weren't). 3606 Additional checks have been added to the transform code to validate the 3607 pixel depths after the transforms on both read and write. 3608 Removed some redundant code from pngwrite.c, in png_destroy_write_struct(). 3609 Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4]. 3610 This removes the need to allocate temporary strings for chunk names on 3611 the stack in the read/write code. Unknown chunk handling still uses the 3612 string form because this is exposed in the API. 3613 3614Version 1.5.6beta02 [September 26, 2011] 3615 Added a note in the manual the png_read_update_info() must be called only 3616 once with a particular info_ptr. 3617 Fixed a typo in the definition of the new PNG_STRING_FROM_CHUNK(s,c) macro. 3618 3619Version 1.5.6beta03 [September 28, 2011] 3620 Revised test-pngtest.sh to report FAIL when pngtest fails. 3621 Added "--strict" option to pngtest, to report FAIL when the failure is 3622 only because the resulting valid files are different. 3623 Revised CMakeLists.txt to work with mingw and removed some material from 3624 CMakeLists.txt that is no longer useful in libpng-1.5. 3625 3626Version 1.5.6beta04 [October 5, 2011] 3627 Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")." 3628 3629Version 1.5.6beta05 [October 12, 2011] 3630 Speed up png_combine_row() for interlaced images. This reduces the generality 3631 of the code, allowing it to be optimized for Adam7 interlace. The masks 3632 passed to png_combine_row() are now generated internally, avoiding 3633 some code duplication and localizing the interlace handling somewhat. 3634 Align png_struct::row_buf - previously it was always unaligned, caused by 3635 a bug in the code that attempted to align it; the code needs to subtract 3636 one from the pointer to take account of the filter byte prepended to 3637 each row. 3638 Optimized png_combine_row() when rows are aligned. This gains a small 3639 percentage for 16-bit and 32-bit pixels in the typical case where the 3640 output row buffers are appropriately aligned. The optimization was not 3641 previously possible because the png_struct buffer was always misaligned. 3642 Fixed bug in png_write_chunk_header() debug print, introduced in 1.5.6beta01. 3643 3644Version 1.5.6beta06 [October 17, 2011] 3645 Removed two redundant tests for uninitialized row. 3646 Fixed a relatively harmless memory overwrite in compressed text writing 3647 with a 1 byte zlib buffer. 3648 Add ability to call png_read_update_info multiple times to pngvalid.c. 3649 Fixes for multiple calls to png_read_update_info. These fixes attend to 3650 most of the errors revealed in pngvalid, however doing the gamma work 3651 twice results in inaccuracies that can't be easily fixed. There is now 3652 a warning in the code if this is going to happen. 3653 Turned on multiple png_read_update_info in pngvalid transform tests. 3654 Prevent libpng from overwriting unused bits at the end of the image when 3655 it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would 3656 overwrite the partial byte at the end of each row if the row width was not 3657 an exact multiple of 8 bits and the image is not interlaced. 3658 3659Version 1.5.6beta07 [October 21, 2011] 3660 Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row 3661 (Mans Rullgard). 3662 3663Version 1.5.6rc01 [October 26, 2011] 3664 Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM" 3665 3666Version 1.5.6rc02 [October 27, 2011] 3667 Added LSR() macro to defend against buggy compilers that evaluate non-taken 3668 code branches and complain about out-of-range shifts. 3669 3670Version 1.5.6rc03 [October 28, 2011] 3671 Renamed the LSR() macro to PNG_LSR() and added PNG_LSL() macro. 3672 Fixed compiler warnings with Intel and MSYS compilers. The logical shift 3673 fix for Microsoft Visual C is required by other compilers, so this 3674 enables that fix for all compilers when using compile-time constants. 3675 Under MSYS 'byte' is a name declared in a system header file, so we 3676 changed the name of a local variable to avoid the warnings that result. 3677 Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h 3678 3679Version 1.5.6 [November 3, 2011] 3680 No changes. 3681 3682Version 1.5.7beta01 [November 4, 2011] 3683 Added support for ARM processor, when decoding all PNG up-filtered rows 3684 and any other-filtered rows with 3 or 4 bytes per pixel (Mans Rullgard). 3685 Fixed bug in pngvalid on early allocation failure; fixed type cast in 3686 pngmem.c; pngvalid would attempt to call png_error() if the allocation 3687 of a png_struct or png_info failed. This would probably have led to a 3688 crash. The pngmem.c implementation of png_malloc() included a cast 3689 to png_size_t which would fail on large allocations on 16-bit systems. 3690 Fix for the preprocessor of the Intel C compiler. The preprocessor 3691 splits adjacent @ signs with a space; this changes the concatenation 3692 token from @-@-@ to PNG_JOIN; that should work with all compiler 3693 preprocessors. 3694 Paeth filter speed improvements from work by Siarhei Siamashka. This 3695 changes the 'Paeth' reconstruction function to improve the GCC code 3696 generation on x86. The changes are only part of the suggested ones; 3697 just the changes that definitely improve speed and remain simple. 3698 The changes also slightly increase the clarity of the code. 3699 3700Version 1.5.7beta02 [November 11, 2011] 3701 Check compression_type parameter in png_get_iCCP and remove spurious 3702 casts. The compression_type parameter is always assigned to, so must 3703 be non-NULL. The cast of the profile length potentially truncated the 3704 value unnecessarily on a 16-bit int system, so the cast of the (byte) 3705 compression type to (int) is specified by ANSI-C anyway. 3706 Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left 3707 the sBIT fields in the test pixel as 0, which resulted in a floating 3708 point division by zero which was irrelevant but causes systems where 3709 FP exceptions cause a crash. Added code to pngvalid to turn on FP 3710 exceptions if the appropriate glibc support is there to ensure this is 3711 tested in the future. 3712 Updated scripts/pnglibconf.mak and scripts/makefile.std to handle the 3713 new PNG_JOIN macro. 3714 Added versioning to pnglibconf.h comments. 3715 Simplified read/write API initial version; basic read/write tested on 3716 a variety of images, limited documentation (in the header file.) 3717 Installed more accurate linear to sRGB conversion tables. The slightly 3718 modified tables reduce the number of 16-bit values that 3719 convert to an off-by-one 8-bit value. The "makesRGB.c" code that was used 3720 to generate the tables is now in a contrib/sRGBtables sub-directory. 3721 3722Version 1.5.7beta03 [November 17, 2011] 3723 Removed PNG_CONST from the sRGB table declarations in pngpriv.h and png.c 3724 Added run-time detection of NEON support. 3725 Added contrib/libtests; includes simplified API test and timing test and 3726 a color conversion utility for rapid checking of failed 'pngstest' results. 3727 Multiple transform bug fixes plus a work-round for double gamma correction. 3728 libpng does not support more than one transform that requires linear data 3729 at once - if this is tried typically the results is double gamma 3730 correction. Since the simplified APIs can need rgb to gray combined with 3731 a compose operation it is necessary to do one of these outside the main 3732 libpng transform code. This check-in also contains fixes to various bugs 3733 in the simplified APIs themselves and to some bugs in compose and rgb to 3734 gray (on palette) itself. 3735 Fixes for C++ compilation using g++ When libpng source is compiled 3736 using g++. The compiler imposes C++ rules on the C source; thus it 3737 is desirable to make the source work with either C or C++ rules 3738 without throwing away useful error information. This change adds 3739 png_voidcast to allow C semantic (void*) cases or the corresponding 3740 C++ static_cast operation, as appropriate. 3741 Added --noexecstack to assembler file compilation. GCC does not set 3742 this on assembler compilation, even though it does on C compilation. 3743 This creates security issues if assembler code is enabled; the 3744 work-around is to set it by default in the flags for $(CCAS) 3745 Work around compilers that don't support declaration of const data. Some 3746 compilers fault 'extern const' data declarations (because the data is 3747 not initialized); this turns on const-ness only for compilers where 3748 this is known to work. 3749 3750Version 1.5.7beta04 [November 17, 2011] 3751 Since the gcc driver does not recognize the --noexecstack flag, we must 3752 use the -Wa prefix to have it passed through to the assembler. 3753 Also removed a duplicate setting of this flag. 3754 Added files that were omitted from the libpng-1.5.7beta03 zip distribution. 3755 3756Version 1.5.7beta05 [November 25, 2011] 3757 Removed "zTXt" from warning in generic chunk decompression function. 3758 Validate time settings passed to png_set_tIME() and png_convert_to_rfc1123() 3759 (Frank Busse). Note: This prevented CVE-2015-7981 from affecting 3760 libpng-1.5.7 and later. 3761 Added MINGW support to CMakeLists.txt 3762 Reject invalid compression flag or method when reading the iTXt chunk. 3763 Backed out 'simplified' API changes. The API seems too complex and there 3764 is a lack of consensus or enthusiasm for the proposals. The API also 3765 reveals significant bugs inside libpng (double gamma correction and the 3766 known bug of being unable to retrieve a corrected palette). It seems 3767 better to wait until the bugs, at least, are corrected. 3768 Moved pngvalid.c into contrib/libtests 3769 Rebuilt Makefile.in, configure, etc., with autoconf-2.68 3770 3771Version 1.5.7rc01 [December 1, 2011] 3772 Replaced an "#if" with "#ifdef" in pngrtran.c 3773 Revised #if PNG_DO_BC block in png.c (use #ifdef and add #else) 3774 3775Version 1.5.7rc02 [December 5, 2011] 3776 Revised project files and contrib/pngvalid/pngvalid.c to account for 3777 the relocation of pngvalid into contrib/libtests. 3778 Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400, 3779 as in libpng-1.5.4. 3780 Put CRLF line endings in the owatcom project files. 3781 3782Version 1.5.7rc03 [December 7, 2011] 3783 Updated CMakeLists.txt to account for the relocation of pngvalid.c 3784 3785Version 1.5.7 [December 15, 2011] 3786 Minor fixes to pngvalid.c for gcc 4.6.2 compatibility to remove warnings 3787 reported by earlier versions. 3788 Fixed minor memset/sizeof errors in pngvalid.c. 3789 3790Version 1.6.0beta01 [December 15, 2011] 3791 Removed machine-generated configure files from the GIT repository (they will 3792 continue to appear in the tarball distributions and in the libpng15 and 3793 earlier GIT branches). 3794 Restored the new 'simplified' API, which was started in libpng-1.5.7beta02 3795 but later deleted from libpng-1.5.7beta05. 3796 Added example programs for the new 'simplified' API. 3797 Added ANSI-C (C90) headers and require them, and take advantage of the 3798 change. Also fixed some of the projects/* and contrib/* files that needed 3799 updates for libpng16 and the move of pngvalid.c. 3800 With this change the required ANSI-C header files are assumed to exist: the 3801 implementation must provide float.h, limits.h, stdarg.h and stddef.h and 3802 libpng relies on limits.h and stddef.h existing and behaving as defined 3803 (the other two required headers aren't used). Non-ANSI systems that don't 3804 have stddef.h or limits.h will have to provide an appropriate fake 3805 containing the relevant types and #defines. 3806 Dropped support for 16-bit platforms. The use of FAR/far has been eliminated 3807 and the definition of png_alloc_size_t is now controlled by a flag so 3808 that 'small size_t' systems can select it if necessary. Libpng 1.6 may 3809 not currently work on such systems -- it seems likely that it will 3810 ask 'malloc' for more than 65535 bytes with any image that has a 3811 sufficiently large row size (rather than simply failing to read such 3812 images). 3813 New tools directory containing tools used to generate libpng code. 3814 Fixed race conditions in parallel make builds. With higher degrees of 3815 parallelism during 'make' the use of the same temporary file names such 3816 as 'dfn*' can result in a race where a temporary file from one arm of the 3817 build is deleted or overwritten in another arm. This changes the 3818 temporary files for suffix rules to always use $* and ensures that the 3819 non-suffix rules use unique file names. 3820 3821Version 1.6.0beta02 [December 21, 2011] 3822 Correct configure builds where build and source directories are separate. 3823 The include path of 'config.h' was erroneously made relative in pngvalid.c 3824 in libpng 1.5.7. 3825 3826Version 1.6.0beta03 [December 22, 2011] 3827 Start-up code size improvements, error handler flexibility. These changes 3828 alter how the tricky allocation of the initial png_struct and png_info 3829 structures are handled. png_info is now handled in pretty much the same 3830 way as everything else, except that the allocations handle NULL return 3831 silently. png_struct is changed in a similar way on allocation and on 3832 deallocation a 'safety' error handler is put in place (which should never 3833 be required). The error handler itself is changed to permit mismatches 3834 in the application and libpng error buffer size; however, this means a 3835 silent change to the API to return the jmp_buf if the size doesn't match 3836 the size from the libpng compilation; libpng now allocates the memory and 3837 this may fail. Overall these changes result in slight code size 3838 reductions; however, this is a reduction in code that is always executed 3839 so is particularly valuable. Overall on a 64-bit system the libpng DLL 3840 decreases in code size by 1733 bytes. pngerror.o increases in size by 3841 about 465 bytes because of the new functionality. 3842 Added png_convert_to_rfc1123_buffer() and deprecated png_convert_to_rfc1123() 3843 to avoid including a spurious buffer in the png_struct. 3844 3845Version 1.6.0beta04 [December 30, 2011] 3846 Regenerated configure scripts with automake-1.11.2 3847 Eliminated png_info_destroy(). It is now used only in png.c and only calls 3848 one other internal function and memset(). 3849 Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously 3850 it was disabled whenever internal fixed point arithmetic was selected, 3851 which meant it didn't exist even on systems where FP was available but not 3852 preferred. 3853 Added pngvalid.c compile time checks for const APIs. 3854 Implemented 'restrict' for png_info and png_struct. Because of the way 3855 libpng works both png_info and png_struct are always accessed via a 3856 single pointer. This means adding C99 'restrict' to the pointer gives 3857 the compiler some opportunity to optimize the code. This change allows 3858 that. 3859 Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper 3860 location in configure.ac (Gilles Espinasse). 3861 Changed png_memcpy to C assignment where appropriate. Changed all those 3862 uses of png_memcpy that were doing a simple assignment to assignments 3863 (all those cases where the thing being copied is a non-array C L-value). 3864 Added some error checking to png_set_*() routines. 3865 Removed the reference to the non-exported function png_memcpy() from 3866 example.c. 3867 Fixed the Visual C 64-bit build - it requires jmp_buf to be aligned, but 3868 it had become misaligned. 3869 Revised contrib/pngminus/pnm2png.c to avoid warnings when png_uint_32 3870 and unsigned long are of different sizes. 3871 3872Version 1.6.0beta05 [January 15, 2012] 3873 Updated manual with description of the simplified API (copied from png.h) 3874 Fix bug in pngerror.c: some long warnings were being improperly truncated 3875 (CVE-2011-3464, bug introduced in libpng-1.5.3beta05). 3876 3877Version 1.6.0beta06 [January 24, 2012] 3878 Added palette support to the simplified APIs. This commit 3879 changes some of the macro definitions in png.h, app code 3880 may need corresponding changes. 3881 Increased the formatted warning buffer to 192 bytes. 3882 Added color-map support to simplified API. This is an initial version for 3883 review; the documentation has not yet been updated. 3884 Fixed Min/GW uninstall to remove libpng.dll.a 3885 3886Version 1.6.0beta07 [January 28, 2012] 3887 Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived) 3888 compiler issues slightly different warnings from those issued by the 3889 current versions of GCC. This eliminates those warnings by 3890 adding/removing casts and small code rewrites. 3891 Updated configure.ac from autoupdate: added --enable-werror option. 3892 Also some layout regularization and removal of introduced tab characters 3893 (replaced with 3-character indentation). Obsolete macros identified by 3894 autoupdate have been removed; the replacements are all in 2.59 so 3895 the pre-req hasn't been changed. --enable-werror checks for support 3896 for -Werror (or the given argument) in the compiler. This mimics the 3897 gcc configure option by allowing -Werror to be turned on safely; without 3898 the option the tests written in configure itself fail compilation because 3899 they cause compiler warnings. 3900 Rewrote autogen.sh to run autoreconf instead of running tools one-by-one. 3901 Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt and 3902 set CMAKE_LIBRARY_OUTPUT_DIRECTORY to "lib" on all platforms (C. Yapp). 3903 Freeze libtool files in the 'scripts' directory. This version of autogen.sh 3904 attempts to dissuade people from running it when it is not, or should not, 3905 be necessary. In fact, autogen.sh does not work when run in a libpng 3906 directory extracted from a tar distribution anymore. You must run it in 3907 a GIT clone instead. 3908 Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale), 3909 and renamed three whose names were inconsistent with those in 3910 pngsuite/README.txt. 3911 3912Version 1.6.0beta08 [February 1, 2012] 3913 Fixed Image::colormap misalignment in pngstest.c 3914 Check libtool/libtoolize version number (2.4.2) in configure.ac 3915 Divide test-pngstest.sh into separate pngstest runs for basic and 3916 transparent images. 3917 Moved automake options to AM_INIT_AUTOMAKE in configure.ac 3918 Added color-tests, silent-rules (Not yet implemented in Makefile.am) and 3919 version checking to configure.ac 3920 Improved pngstest speed by not doing redundant tests and add const to 3921 the background parameter of png_image_finish_read. The --background 3922 option is now done automagically only when required, so that commandline 3923 option no longer exists. 3924 Cleaned up pngpriv.h to consistently declare all functions and data. 3925 Also eliminated PNG_CONST_DATA, which is apparently not needed but we 3926 can't be sure until it is gone. 3927 Added symbol prefixing that allows all the libpng external symbols 3928 to be prefixed (suggested by Reuben Hawkins). 3929 Updated "ftbb*.png" list in the owatcom and vstudio projects. 3930 Fixed 'prefix' builds on clean systems. The generation of pngprefix.h 3931 should not require itself. 3932 Updated INSTALL to explain that autogen.sh must be run in a GIT clone, 3933 not in a libpng directory extracted from a tar distribution. 3934 3935Version 1.6.0beta09 [February 1, 2012] 3936 Reverted the prebuilt configure files to libpng-1.6.0beta05 condition. 3937 3938Version 1.6.0beta10 [February 3, 2012] 3939 Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests 3940 Updated list of test images in CMakeLists.txt 3941 Updated the prebuilt configure files to current condition. 3942 Revised INSTALL information about autogen.sh; it works in tar distributions. 3943 3944Version 1.6.0beta11 [February 16, 2012] 3945 Fix character count in pngstest command in projects/owatcom/pngstest.tgt 3946 Revised test-pngstest.sh to report PASS/FAIL for each image. 3947 Updated documentation about the simplified API. 3948 Corrected estimate of error in libpng png_set_rgb_to_gray API. The API is 3949 extremely inaccurate for sRGB conversions because it uses an 8-bit 3950 intermediate linear value and it does not use the sRGB transform, so it 3951 suffers from the known instability in gamma transforms for values close 3952 to 0 (see Poynton). The net result is that the calculation has a maximum 3953 error of 14.99/255; 0.5/255^(1/2.2). pngstest now uses 15 for the 3954 permitted 8-bit error. This may still not be enough because of arithmetic 3955 error. 3956 Removed some unused arrays (with #ifdef) from png_read_push_finish_row(). 3957 Fixed a memory overwrite bug in simplified read of RGB PNG with 3958 non-linear gamma Also bugs in the error checking in pngread.c and changed 3959 quite a lot of the checks in pngstest.c to be correct; either correctly 3960 written or not over-optimistic. The pngstest changes are insufficient to 3961 allow all possible RGB transforms to be passed; pngstest cmppixel needs 3962 to be rewritten to make it clearer which errors it allows and then changed 3963 to permit known inaccuracies. 3964 Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h 3965 Fixed fixed/float API export conditionals. 1) If FIXED_POINT or 3966 FLOATING_POINT options were switched off, png.h ended up with lone ';' 3967 characters. This is not valid ANSI-C outside a function. The ';' 3968 characters have been moved inside the definition of PNG_FP_EXPORT and 3969 PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration 3970 of the corresponding functions were completely omitted, even though some 3971 of them are still used internally. The result is still valid, but 3972 produces warnings from gcc with some warning options (including -Wall). The 3973 fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION 3974 when png.h is included from pngpriv.h. 3975 Check for invalid palette index while reading paletted PNG. When one is 3976 found, issue a warning and increase png_ptr->num_palette accordingly. 3977 Apps are responsible for checking to see if that happened. 3978 3979Version 1.6.0beta12 [February 18, 2012] 3980 Do not increase num_palette on invalid_index. 3981 Relocated check for invalid palette index to pngrtran.c, after unpacking 3982 the sub-8-bit pixels. 3983 Fixed CVE-2011-3026 buffer overrun bug. This bug was introduced when 3984 iCCP chunk support was added at libpng-1.0.6. Deal more correctly with the 3985 test on iCCP chunk length. Also removed spurious casts that may hide 3986 problems on 16-bit systems. 3987 3988Version 1.6.0beta13 [February 24, 2012] 3989 Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from 3990 pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c; 3991 now that png_ptr->buffer is inaccessible to applications, the special 3992 handling is no longer useful. 3993 Added PNG_SAFE_LIMITS feature to pnglibconf.dfa, pngpriv.h, and new 3994 pngusr.dfa to reset the user limits to safe ones if PNG_SAFE_LIMITS is 3995 defined. To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED=1" on the 3996 configure command or put #define PNG_SAFE_LIMITS_SUPPORTED in 3997 pnglibconf.h.prebuilt and pnglibconf.h. 3998 3999Version 1.6.0beta14 [February 27, 2012] 4000 Added information about the new limits in the manual. 4001 Updated Makefile.in 4002 4003Version 1.6.0beta15 [March 2, 2012] 4004 Removed unused "current_text" members of png_struct and the png_free() 4005 of png_ptr->current_text from pngread.c 4006 Rewrote pngstest.c for substantial speed improvement. 4007 Fixed transparent pixel and 16-bit rgb tests in pngstest and removed a 4008 spurious check in pngwrite.c 4009 Added PNG_IMAGE_FLAG_FAST for the benefit of applications that store 4010 intermediate files, or intermediate in-memory data, while processing 4011 image data with the simplified API. The option makes the files larger 4012 but faster to write and read. pngstest now uses this by default; this 4013 can be disabled with the --slow option. 4014 Improved pngstest fine tuning of error numbers, new test file generator. 4015 The generator generates images that test the full range of sample values, 4016 allow the error numbers in pngstest to be tuned and checked. makepng 4017 also allows generation of images with extra chunks, although this is 4018 still work-in-progress. 4019 Added check for invalid palette index while reading. 4020 Fixed some bugs in ICC profile writing. The code should now accept 4021 all potentially valid ICC profiles and reject obviously invalid ones. 4022 It now uses png_error() to do so rather than casually writing a PNG 4023 without the necessary color data. 4024 Removed whitespace from the end of lines in all source files and scripts. 4025 4026Version 1.6.0beta16 [March 6, 2012] 4027 Relocated palette-index checking function from pngrutil.c to pngtrans.c 4028 Added palette-index checking while writing. 4029 Changed png_inflate() and calling routines to avoid overflow problems. 4030 This is an intermediate check-in that solves the immediate problems and 4031 introduces one performance improvement (avoiding a copy via png_ptr->zbuf.) 4032 Further changes will be made to make ICC profile handling more secure. 4033 Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default options 4034 declares 'index' as a global, causing a warning if it is used as a local 4035 variable. GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit) 4036 to an (int) (signed 32-bit). MSVC, however, warns about using the 4037 unary '-' operator on an unsigned value (even though it is well defined 4038 by ANSI-C to be ~x+1). The padding calculation was changed to use a 4039 different method. Removed the tests on png_ptr->pass. 4040 Added contrib/libtests/tarith.c to test internal arithmetic functions from 4041 png.c. This is a libpng maintainer program used to validate changes to the 4042 internal arithmetic functions. 4043 Made read 'inflate' handling like write 'deflate' handling. The read 4044 code now claims and releases png_ptr->zstream, like the write code. 4045 The bug whereby the progressive reader failed to release the zstream 4046 is now fixed, all initialization is delayed, and the code checks for 4047 changed parameters on deflate rather than always calling 4048 deflatedEnd/deflateInit. 4049 Validate the zTXt strings in pngvalid. 4050 Added code to validate the windowBits value passed to deflateInit2(). 4051 If the call to deflateInit2() is wrong a png_warning will be issued 4052 (in fact this is harmless, but the PNG data produced may be sub-optimal). 4053 4054Version 1.6.0beta17 [March 10, 2012] 4055 Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition. 4056 Reject all iCCP chunks after the first, even if the first one is invalid. 4057 Deflate/inflate was reworked to move common zlib calls into single 4058 functions [rw]util.c. A new shared keyword check routine was also added 4059 and the 'zbuf' is no longer allocated on progressive read. It is now 4060 possible to call png_inflate() incrementally. A warning is no longer 4061 issued if the language tag or translated keyword in the iTXt chunk 4062 has zero length. 4063 If benign errors are disabled use maximum window on ancillary inflate. 4064 This works round a bug introduced in 1.5.4 where compressed ancillary 4065 chunks could end up with a too-small windowBits value in the deflate 4066 header. 4067 4068Version 1.6.0beta18 [March 16, 2012] 4069 Issue a png_benign_error() instead of png_warning() about bad palette index. 4070 In pngtest, treat benign errors as errors if "-strict" is present. 4071 Fixed an off-by-one error in the palette index checking function. 4072 Fixed a compiler warning under Cygwin (Windows-7, 32-bit system) 4073 Revised example.c to put text strings in a temporary character array 4074 instead of directly assigning string constants to png_textp members. 4075 This avoids compiler warnings when -Wwrite-strings is enabled. 4076 Added output flushing to aid debugging under Visual Studio. Unfortunately 4077 this is necessary because the VS2010 output window otherwise simply loses 4078 the error messages on error (they weren't flushed to the window before 4079 the process exited, apparently!) 4080 Added configuration support for benign errors and changed the read 4081 default. Also changed some warnings in the iCCP and sRGB handling 4082 from to benign errors. Configuration now makes read benign 4083 errors warnings and write benign errors to errors by default (thus 4084 changing the behavior on read). The simplified API always forces 4085 read benign errors to warnings (regardless of the system default, unless 4086 this is disabled in which case the simplified API can't be built.) 4087 4088Version 1.6.0beta19 [March 18, 2012] 4089 Work around for duplicate row start calls; added warning messages. 4090 This turns on PNG_FLAG_DETECT_UNINITIALIZED to detect app code that 4091 fails to call one of the 'start' routines (not enabled in libpng-1.5 4092 because it is technically an API change, since it did normally work 4093 before.) It also makes duplicate calls to png_read_start_row (an 4094 internal function called at the start of the image read) benign, as 4095 they were before changes to use png_inflate_claim. Somehow webkit is 4096 causing this to happen; this is probably a mis-feature in the zlib 4097 changes so this commit is only a work-round. 4098 Removed erroneous setting of DETECT_UNINITIALIZED and added more 4099 checks. The code now does a png_error if an attempt is made to do the 4100 row initialization twice; this is an application error and it has 4101 serious consequences because the transform data in png_struct is 4102 changed by each call. 4103 Added application error reporting and added chunk names to read 4104 benign errors; also added --strict to pngstest - not enabled 4105 yet because a warning is produced. 4106 Avoid the double gamma correction warning in the simplified API. 4107 This allows the --strict option to pass in the pngstest checks 4108 4109Version 1.6.0beta20 [March 29, 2012] 4110 Changed chunk handler warnings into benign errors, incrementally load iCCP 4111 Added checksum-icc.c to contrib/tools 4112 Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice. 4113 Recognize known sRGB ICC profiles while reading; prefer writing the 4114 iCCP profile over writing the sRGB chunk, controlled by the 4115 PNG_sRGB_PROFILE_CHECKS option. 4116 Revised png_set_text_2() to avoid potential memory corruption (fixes 4117 CVE-2011-3048, also known as CVE-2012-3425). 4118 4119Version 1.6.0beta21 [April 27, 2012] 4120 Revised scripts/makefile.darwin: use system zlib; remove quotes around 4121 architecture list; add missing ppc architecture; add architecture options 4122 to shared library link; don't try to create a shared lib based on missing 4123 RELEASE variable. 4124 Enable png_set_check_for_invalid_index() for both read and write. 4125 Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpriv.h around 4126 declaration of png_handle_unknown(). 4127 Added -lssp_nonshared in a comment in scripts/makefile.freebsd 4128 and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE. 4129 4130Version 1.6.0beta22 [May 23, 2012] 4131 Removed need for -Wno-cast-align with clang. clang correctly warns on 4132 alignment increasing pointer casts when -Wcast-align is passed. This 4133 fixes the cases that clang warns about either by eliminating the 4134 casts from png_bytep to png_uint_16p (pngread.c), or, for pngrutil.c 4135 where the cast is previously verified or pngstest.c where it is OK, by 4136 introducing new png_aligncast macros to do the cast in a way that clang 4137 accepts. 4138 4139Version 1.6.0beta23 [June 6, 2012] 4140 Revised CMakeLists.txt to not attempt to make a symlink under mingw. 4141 Made fixes for new optimization warnings from gcc 4.7.0. The compiler 4142 performs an optimization which is safe; however it then warns about it. 4143 Changing the type of 'palette_number' in pngvalid.c removes the warning. 4144 Do not depend upon a GCC feature macro being available for use in generating 4145 the linker mapfile symbol prefix. 4146 Improved performance of new do_check_palette_indexes() function (only 4147 update the value when it actually increases, move test for whether 4148 the check is wanted out of the function. 4149 4150Version 1.6.0beta24 [June 7, 2012] 4151 Don't check palette indexes if num_palette is 0 (as it can be in MNG files). 4152 4153Version 1.6.0beta25 [June 16, 2012] 4154 Revised png_set_keep_unknown_chunks() so num_chunks < 0 means ignore all 4155 unknown chunks and all known chunks except for IHDR, PLTE, tRNS, IDAT, 4156 and IEND. Previously it only meant ignore all unknown chunks, the 4157 same as num_chunks == 0. Revised png_image_skip_unused_chunks() to 4158 provide a list of chunks to be processed instead of a list of chunks to 4159 ignore. Revised contrib/gregbook/readpng2.c accordingly. 4160 4161Version 1.6.0beta26 [July 10, 2012] 4162 Removed scripts/makefile.cegcc from the *.zip and *.7z distributions; it 4163 depends on configure, which is not included in those archives. 4164 Moved scripts/chkfmt to contrib/tools. 4165 Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386. 4166 4167Version 1.6.0beta27 [August 11, 2012] 4168 Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3. 4169 Do not use __restrict when GNUC is <= 3.1 4170 Removed references to png_zalloc() and png_zfree() from the manual. 4171 Fixed configurations where floating point is completely disabled. Because 4172 of the changes to support symbol prefixing PNG_INTERNAL_FUNCTION declares 4173 floating point APIs during libpng builds even if they are completely 4174 disabled. This requires the png floating point types (png_double*) to be 4175 declared even though the functions are never actually defined. This 4176 change provides a dummy definition so that the declarations work, yet any 4177 implementation will fail to compile because of an incomplete type. 4178 Re-eliminated the use of strcpy() in pngtest.c. An unnecessary use of 4179 strcpy() was accidentally re-introduced in libpng16; this change replaces 4180 it with strncpy(). 4181 Eliminated use of png_sizeof(); use sizeof() instead. 4182 Use a consistent style for (sizeof type) and (sizeof (array)) 4183 Cleanup of png_set_filler(). This function does very different things on 4184 read and write. In libpng 1.6 the two cases can be distinguished and 4185 considerable code cleanup, and extra error checking, is possible. This 4186 makes calls on the write side that have no effect be ignored with a 4187 png_app_error(), which can be disabled in the app using 4188 png_set_benign_errors(), and removes the spurious use of usr_channels 4189 on the read side. 4190 Insist on autotools 1.12.1 for git builds because there are security issues 4191 with 1.12 and insisting on anything less would allow 1.12 to be used. 4192 Removed info_ptr->signature[8] from WRITE-only builds. 4193 Add some conditions for compiling png_fixed(). This is a small function 4194 but it requires "-lm" on some platforms. 4195 Cause pngtest --strict to fail on any warning from libpng (not just errors) 4196 and cause it not to fail at the comparison step if libpng lacks support 4197 for writing chunks that it reads from the input (currently only implemented 4198 for compressed text chunks). 4199 Make all three "make check" test programs work without READ or WRITE support. 4200 Now "make check" will succeed even if libpng is compiled with -DPNG_NO_READ 4201 or -DPNG_NO_WRITE. The tests performed are reduced, but the basic reading 4202 and writing of a PNG file is always tested by one or more of the tests. 4203 Consistently use strlen(), memset(), memcpy(), and memcmp() instead of the 4204 png_strlen(), png_memset(), png_memcpy(), and png_memcmp() macros. 4205 Removed the png_sizeof(), png_strlen(), png_memset(), png_memcpy(), and 4206 png_memcmp() macros. 4207 Work around gcc 3.x and Microsoft Visual Studio 2010 complaints. Both object 4208 to the split initialization of num_chunks. 4209 4210Version 1.6.0beta28 [August 29, 2012] 4211 Unknown handling fixes and clean up. This adds more correct option 4212 control of the unknown handling, corrects the pre-existing bug where 4213 the per-chunk 'keep' setting is ignored and makes it possible to skip 4214 IDAT chunks in the sequential reader (broken in earlier 1.6 versions). 4215 There is a new test program, test-unknown.c, which is a work in progress 4216 (not currently part of the test suite). Comments in the header files now 4217 explain how the unknown handling works. 4218 Allow fine grain control of unknown chunk APIs. This change allows 4219 png_set_keep_unknown_chunks() to be turned off if not required and causes 4220 both read and write to behave appropriately (on read this is only possible 4221 if the user callback is used to handle unknown chunks). The change 4222 also removes the support for storing unknown chunks in the info_struct 4223 if the only unknown handling enabled is via the callback, allowing libpng 4224 to be configured with callback reading and none of the unnecessary code. 4225 Corrected fix for unknown handling in pngtest. This reinstates the 4226 libpng handling of unknown chunks other than vpAg and sTER (including 4227 unsafe-to-copy chunks which were dropped before) and eliminates the 4228 repositioning of vpAg and sTER in pngtest.png by changing pngtest.png 4229 (so the chunks are where libpng would put them). 4230 Added "tunknown" test and corrected a logic error in png_handle_unknown() 4231 when SAVE support is absent. Moved the shell test scripts for 4232 contrib/libtests from the libpng top directory to contrib/libtests. 4233 png_handle_unknown() must always read or skip the chunk, if 4234 SAVE_UNKNOWN_CHUNKS is turned off *and* the application does not set 4235 a user callback an unknown chunk will not be read, leading to a read 4236 error, which was revealed by the "tunknown" test. 4237 Cleaned up and corrected ICC profile handling. 4238 contrib/libtests/makepng: corrected 'rgb' and 'gray' cases. profile_error 4239 messages could be truncated; made a correct buffer size calculation and 4240 adjusted pngerror.c appropriately. png_icc_check_* checking improved; 4241 changed the functions to receive the correct color type of the PNG on read 4242 or write and check that it matches the color space of the profile (despite 4243 what the comments said before, there is danger in assuming the app will 4244 cope correctly with an RGB profile on a grayscale image and, since it 4245 violates the PNG spec, allowing it is certain to produce inconsistent 4246 app behavior and might even cause app crashes.) Check that profiles 4247 contain the tags needed to process the PNG (tags all required by the ICC 4248 spec). Removed unused PNG_STATIC from pngpriv.h. 4249 4250Version 1.6.0beta29 [September 4, 2012] 4251 Fixed the simplified API example programs to add the *colormap parameter 4252 to several of he API and improved the error message if the version field 4253 is not set. 4254 Added contrib/examples/* to the *.zip and *.7z distributions. 4255 Updated simplified API synopses and description of the png_image structure 4256 in the manual. 4257 Made makepng and pngtest produce identical PNGs, add "--relaxed" option 4258 to pngtest. The "--relaxed" option turns off the benign errors that are 4259 enabled by default in pre-RC builds. makepng can now write ICC profiles 4260 where the length has not been extended to a multiple of 4, and pngtest 4261 now intercepts all libpng errors, allowing the previously-introduced 4262 "--strict test" on no warnings to actually work. 4263 Improved ICC profile handling including cHRM chunk generation and fixed 4264 Cygwin+MSVC build errors. The ICC profile handling now includes more 4265 checking. Several errors that caused rejection of the profile are now 4266 handled with a warning in such a way that the invalid profiles will be 4267 read by default in release (but not pre-RC) builds but will not be 4268 written by default. The easy part of handling the cHRM chunk is written, 4269 where the ICC profile contains the required data. The more difficult 4270 part plus guessing a gAMA value requires code to pass selected RGB values 4271 through the profile. 4272 4273Version 1.6.0beta30 [October 24, 2012] 4274 Changed ICC profile matrix/vector types to not depend on array type rules. 4275 By the ANSI-C standard the new types should be identical to the previous 4276 versions, and all known versions of gcc tested with the previous versions 4277 except for GCC-4.2.1 work with this version. The change makes the ANSI-C 4278 rule that const applied to an array of elements applies instead to the 4279 elements in the array moot by explicitly applying const to the base 4280 elements of the png_icc_matrix and png_icc_vector types. The accidental 4281 (harmless) 'const' previously applied to the parameters of two of the 4282 functions have also been removed. 4283 Added a work around for GCC 4.2 optimization bug. 4284 Marked the broken (bad white point) original HP sRGB profiles correctly and 4285 correct comments. 4286 Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7 4287 Use /MDd for vstudio debug builds. Also added pngunkown to the vstudio 4288 builds, fixed build errors and corrected a minor exit code error in 4289 pngvalid if the 'touch' file name is invalid. 4290 Add updated WARNING file to projects/vstudio from libpng 1.5/vstudio 4291 Fixed build when using #define PNG_NO_READ_GAMMA in png_do_compose() in 4292 pngrtran.c (Domani Hannes). 4293 4294Version 1.6.0beta31 [November 1, 2012] 4295 Undid the erroneous change to vstudio/pngvalid build in libpng-1.6.0beta30. 4296 Made pngvalid so that it will build outside the libpng source tree. 4297 Made builds -DPNG_NO_READ_GAMMA compile (the unit tests still fail). 4298 Made PNG_NO_READ_GAMMA switch off interfaces that depend on READ_GAMMA. 4299 Prior to 1.6.0 switching off READ_GAMMA did unpredictable things to the 4300 interfaces that use it (specifically, png_do_background in 1.4 would 4301 simply display composite for grayscale images but do composition 4302 with the incorrect arithmetic for color ones). In 1.6 the semantic 4303 of -DPNG_NO_READ_GAMMA is changed to simply disable any interface that 4304 depends on it; this obliges people who set it to consider whether they 4305 really want it off if they happen to use any of the interfaces in 4306 question (typically most users who disable it won't). 4307 Fixed GUIDs in projects/vstudio. Some were duplicated or missing, 4308 resulting in VS2010 having to update the files. 4309 Removed non-working ICC profile support code that was mostly added to 4310 libpng-1.6.0beta29 and beta30. There was too much code for too little 4311 gain; implementing full ICC color correction may be desirable but is left 4312 up to applications. 4313 4314Version 1.6.0beta32 [November 25, 2012] 4315 Fixed an intermittent SEGV in pngstest due to an uninitialized array element. 4316 Added the ability for contrib/libtests/makepng.c to make a PNG with just one 4317 color. This is useful for debugging pngstest color inaccuracy reports. 4318 Fixed error checking in the simplified write API (Olaf van der Spek) 4319 Made png_user_version_check() ok to use with libpng version 1.10.x and later. 4320 4321Version 1.6.0beta33 [December 15, 2012] 4322 Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX) 4323 that causes the MALLOC_MAX limit not to work (John Bowler) 4324 Change png_warning() to png_app_error() in pngwrite.c and comment the 4325 fall-through condition. 4326 Change png_warning() to png_app_warning() in png_write_tRNS(). 4327 Rearranged the ARM-NEON optimizations: Isolated the machine specific code 4328 to the hardware subdirectory and added comments to pngrutil.c so that 4329 implementors of other optimizations know what to do. 4330 Fixed cases of unquoted DESTDIR in Makefile.am 4331 Rebuilt Makefile.in, etc., with autoconf-2.69 and automake-1.12.5. 4332 4333Version 1.6.0beta34 [December 19, 2012] 4334 Cleaned up whitespace in the synopsis portion of the manpage "libpng.3" 4335 Disassembled the version number in scripts/options.awk (necessary for 4336 building on SunOs). 4337 4338Version 1.6.0beta35 [December 23, 2012] 4339 Made default Zlib compression settings be configurable. This adds #defines to 4340 pnglibconf.h to control the defaults. 4341 Fixed Windows build issues, enabled ARM compilation. Various warnings issued 4342 by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old 4343 GCCs.) ARM support is enabled by default in zlib.props (unsupported by 4344 Microsoft) and ARM compilation is made possible by deleting the check for 4345 x86. The test programs cannot be run because they are not signed. 4346 4347Version 1.6.0beta36 [January 2, 2013] 4348 Discontinued distributing libpng-1.x.x.tar.bz2. 4349 Discontinued distributing libpng-1.7.0-1.6.0-diff.txt and similar. 4350 Rebuilt configure with autoconf-2.69 (inadvertently not done in beta33) 4351 Fixed 'make distcheck' on SUN OS - libpng.so was not being removed 4352 4353Version 1.6.0beta37 [January 10, 2013] 4354 Fixed conceivable but difficult to repro overflow. Also added two test 4355 programs to generate and test a PNG which should have the problem. 4356 4357Version 1.6.0beta39 [January 19, 2013] 4358 Again corrected attempt at overflow detection in png_set_unknown_chunks() 4359 (CVE-2013-7353). Added overflow detection in png_set_sPLT() and 4360 png_set_text_2() (CVE-2013-7354). 4361 4362Version 1.6.0beta40 [January 20, 2013] 4363 Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs 4364 4365Version 1.6.0rc01 [January 26, 2013] 4366 No changes. 4367 4368Version 1.6.0rc02 [February 4, 2013] 4369 Added png_get_palette_max() function. 4370 4371Version 1.6.0rc03 [February 5, 2013] 4372 Fixed the png_get_palette_max API. 4373 4374Version 1.6.0rc04 [February 7, 2013] 4375 Turn serial tests back on (recently turned off by autotools upgrade). 4376 4377Version 1.6.0rc05 [February 8, 2013] 4378 Update manual about png_get_palette_max(). 4379 4380Version 1.6.0rc06 [February 9, 2013] 4381 Fixed missing dependency in --prefix builds The intermediate 4382 internal 'prefix.h' file can only be generated correctly after 4383 pnglibconf.h, however the dependency was not in Makefile.am. The 4384 symptoms are unpredictable depending on the order make chooses to 4385 build pngprefix.h and pnglibconf.h, often the error goes unnoticed 4386 because there is a system pnglibconf.h to use instead. 4387 4388Version 1.6.0rc07 [February 10, 2013] 4389 Enclosed the new png_get_palette_max in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED 4390 block, and revised pnglibconf.h and pnglibconf.h.prebuilt accordingly. 4391 4392Version 1.6.0rc08 [February 10, 2013] 4393 Fix typo in png.h #ifdef 4394 4395Version 1.6.0 [February 14, 2013] 4396 No changes. 4397 4398Version 1.6.1beta01 [February 16, 2013] 4399 Made symbol prefixing work with the ARM neon optimizations. Also allow 4400 pngpriv.h to be included for preprocessor definitions only, so it can 4401 be used in non-C/C++ files. Back ported from libpng 1.7. 4402 Made sRGB check numbers consistent. 4403 Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug. 4404 Removed cc -E workround, corrected png_get_palette_max API Tested on 4405 SUN OS cc 5.9, which demonstrates the tokenization problem previously 4406 avoided by using /lib/cpp. Since all .dfn output is now protected in 4407 double quotes unless it is to be macro substituted the fix should 4408 work everywhere. 4409 Enabled parallel tests - back ported from libpng-1.7. 4410 scripts/pnglibconf.dfa formatting improvements back ported from libpng17. 4411 Fixed a race condition in the creation of the build 'scripts' directory 4412 while building with a parallel make. 4413 Use approved/supported Android method to check for NEON, use Linux/POSIX 4414 1003.1 API to check /proc/self/auxv avoiding buffer allocation and other 4415 library calls (ported from libpng15). 4416 4417Version 1.6.1beta02 [February 19, 2013] 4418 Use parentheses more consistently in "#if defined(MACRO)" tests. 4419 Folded long lines. 4420 Reenabled code to allow zero length PLTE chunks for MNG. 4421 4422Version 1.6.1beta03 [February 22, 2013] 4423 Fixed ALIGNED_MEMORY support. 4424 Added a new configure option: 4425 --enable-arm-neon=always will stop the run-time checks. New checks 4426 within arm/arm_init.c will cause the code not to be compiled unless 4427 __ARM_NEON__ is set. This should make it fail safe (if someone asks 4428 for it on then the build will fail if it can't be done.) 4429 Updated the INSTALL document. 4430 4431Version 1.6.1beta04 [February 27, 2013] 4432 Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES. 4433 Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC. 4434 Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble 4435 with CRLF line endings. 4436 4437Version 1.6.1beta05 [March 1, 2013] 4438 Avoid a possible memory leak in contrib/gregbook/readpng.c 4439 4440Version 1.6.1beta06 [March 4, 2013] 4441 Better documentation of unknown handling API interactions. 4442 Corrected Android builds and corrected libpng.vers with symbol 4443 prefixing. It also makes those tests compile and link on Android. 4444 Added an API png_set_option() to set optimization options externally, 4445 providing an alternative and general solution for the non-portable 4446 run-time tests used by the ARM Neon code, using the PNG_ARM_NEON option. 4447 The order of settings vs options in pnglibconf.h is reversed to allow 4448 settings to depend on options and options can now set (or override) the 4449 defaults for settings. 4450 4451Version 1.6.1beta07 [March 7, 2013] 4452 Corrected simplified API default gamma for color-mapped output, added 4453 a flag to change default. In 1.6.0 when the simplified API was used 4454 to produce color-mapped output from an input image with no gamma 4455 information the gamma assumed for the input could be different from 4456 that assumed for non-color-mapped output. In particular 16-bit depth 4457 input files were assumed to be sRGB encoded, whereas in the 'direct' 4458 case they were assumed to have linear data. This was an error. The 4459 fix makes the simplified API treat all input files the same way and 4460 adds a new flag to the png_image::flags member to allow the 4461 application/user to specify that 16-bit files contain sRGB data 4462 rather than the default linear. 4463 Fixed bugs in the pngpixel and makepng test programs. 4464 4465Version 1.6.1beta08 [March 7, 2013] 4466 Fixed CMakelists.txt to allow building a single variant of the library 4467 (Claudio Bley): 4468 Introduced a PNG_LIB_TARGETS variable that lists all activated library 4469 targets. It is an error if this variable ends up empty, ie. you have 4470 to build at least one library variant. 4471 Made the *_COPY targets only depend on library targets actually being build. 4472 Use PNG_LIB_TARGETS to unify a code path. 4473 Changed the CREATE_SYMLINK macro to expect the full path to a file as the 4474 first argument. When symlinking the filename component of that path is 4475 determined and used as the link target. 4476 Use copy_if_different in the CREATE_SYMLINK macro. 4477 4478Version 1.6.1beta09 [March 13, 2013] 4479 Eliminated two warnings from the Intel C compiler. The warnings are 4480 technically valid, although a reasonable treatment of division would 4481 show it to be incorrect. 4482 4483Version 1.6.1rc01 [March 21, 2013] 4484 No changes. 4485 4486Version 1.6.1 [March 28, 2013] 4487 No changes. 4488 4489Version 1.6.2beta01 [April 14, 2013] 4490 Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling. 4491 Fixed incorrect warning of excess deflate data. End condition - the 4492 warning would be produced if the end of the deflate stream wasn't read 4493 in the last row. The warning is harmless. 4494 Corrected the test on user transform changes on read. It was in the 4495 png_set of the transform function, but that doesn't matter unless the 4496 transform function changes the rowbuf size, and that is only valid if 4497 transform_info is called. 4498 Corrected a misplaced closing bracket in contrib/libtests/pngvalid.c 4499 (Flavio Medeiros). 4500 Corrected length written to uncompressed iTXt chunks (Samuli Suominen). 4501 Bug was introduced in libpng-1.6.0. 4502 4503Version 1.6.2rc01 [April 18, 2013] 4504 Added contrib/tools/fixitxt.c, to repair the erroneous iTXt chunk length 4505 written by libpng-1.6.0 and 1.6.1. 4506 Disallow storing sRGB information when the sRGB is not supported. 4507 4508Version 1.6.2rc02 [April 18, 2013] 4509 Merge pngtest.c with libpng-1.7.0 4510 4511Version 1.6.2rc03 [April 22, 2013] 4512 Trivial spelling cleanup. 4513 4514Version 1.6.2rc04 and 1.6.2rc05 [omitted] 4515 4516Version 1.6.2rc06 [April 24, 2013] 4517 Reverted to version 1.6.2rc03. Recent changes to arm/neon support 4518 have been ported to libpng-1.7.0beta09 and will reappear in version 4519 1.6.3beta01. 4520 4521Version 1.6.2 [April 25, 2013] 4522 No changes. 4523 4524Version 1.6.3beta01 [April 25, 2013] 4525 Revised stack marking in arm/filter_neon.S and configure.ac. 4526 Ensure that NEON filter stuff is completely disabled when switched 'off'. 4527 Previously the ARM NEON specific files were still built if the option 4528 was switched 'off' as opposed to being explicitly disabled. 4529 4530Version 1.6.3beta02 [April 26, 2013] 4531 Test for 'arm*' not just 'arm' in the host_cpu configure variable. 4532 Rebuilt the configure scripts. 4533 4534Version 1.6.3beta03 [April 30, 2013] 4535 Expanded manual paragraph about writing private chunks, particularly 4536 the need to call png_set_keep_unknown_chunks() when writing them. 4537 Avoid dereferencing NULL pointer possibly returned from 4538 png_create_write_struct() (Andrew Church). 4539 4540Version 1.6.3beta05 [May 9, 2013] 4541 Calculate our own zlib windowBits when decoding rather than trusting the 4542 CMF bytes in the PNG datastream. 4543 Added an option to force maximum window size for inflating, which was 4544 the behavior of libpng15 and earlier, via a new PNG_MAXIMUM_INFLATE_WINDOW 4545 option for png_set_options(). 4546 Added png-fix-itxt and png-fix-too-far-back to the built programs and 4547 removed warnings from the source code and timepng that are revealed as 4548 a result. 4549 Detect wrong libpng versions linked to png-fix-too-far-back, which currently 4550 only works with libpng versions that can be made to reliably fail when 4551 the deflate data contains an out-of-window reference. This means only 4552 1.6 and later. 4553 Fixed gnu issues: g++ needs a static_cast, gcc 4.4.7 has a broken warning 4554 message which it is easier to work round than ignore. 4555 Updated contrib/pngminus/pnm2png.c (Paul Stewart): 4556 Check for EOF 4557 Ignore "#" delimited comments in input file to pnm2png.c. 4558 Fixed whitespace handling 4559 Added a call to png_set_packing() 4560 Initialize dimension values so if sscanf fails at least we have known 4561 invalid values. 4562 Attempt to detect configuration issues with png-fix-too-far-back, which 4563 requires both the correct libpng and the correct zlib to function 4564 correctly. 4565 Check ZLIB_VERNUM for mismatches, enclose #error in quotes 4566 Added information in the documentation about problems with and fixes for 4567 the bad CRC and bad iTXt chunk situations. 4568 4569Version 1.6.3beta06 [May 12, 2013] 4570 Allow contrib/pngminus/pnm2png.c to compile without WRITE_INVERT and 4571 WRITE_PACK supported (writes error message that it can't read P1 or 4572 P4 PBM files). 4573 Improved png-fix-too-far-back usage message, added --suffix option. 4574 Revised contrib/pngminim/*/makefile to generate pnglibconf.h with the 4575 right zlib header files. 4576 Separated CPPFLAGS and CFLAGS in contrib/pngminim/*/makefile 4577 4578Version 1.6.3beta07 [June 8, 2013] 4579 Removed a redundant test in png_set_IHDR(). 4580 Added set(CMAKE_CONFIGURATION_TYPES ...) to CMakeLists.txt (Andrew Hundt) 4581 Deleted set(CMAKE_BUILD_TYPE) block from CMakeLists.txt 4582 Enclose the prototypes for the simplified write API in 4583 #ifdef PNG_STDIO_SUPPORTED/#endif 4584 Make ARM NEON support work at compile time (not just configure time). 4585 This moves the test on __ARM_NEON__ into pngconf.h to avoid issues when 4586 using a compiler that compiles for multiple architectures at one time. 4587 Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from 4588 pnglibconf.h, allowing more of the decisions to be made internally 4589 (pngpriv.h) during the compile. Without this, symbol prefixing is broken 4590 under certain circumstances on ARM platforms. Now only the API parts of 4591 the optimizations ('check' vs 'api') are exposed in the public header files 4592 except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the 4593 decision about whether or not to use the optimizations. 4594 Protect symbol prefixing against CC/CPPFLAGS/CFLAGS usage. 4595 Previous iOS/Xcode fixes for the ARM NEON optimizations moved the test 4596 on __ARM_NEON__ from configure time to compile time. This breaks symbol 4597 prefixing because the definition of the special png_init_filter_functions 4598 call was hidden at configure time if the relevant compiler arguments are 4599 passed in CFLAGS as opposed to CC. This change attempts to avoid all 4600 the confusion that would result by declaring the init function even when 4601 it is not used, so that it will always get prefixed. 4602 4603Version 1.6.3beta08 [June 18, 2013] 4604 Revised libpng.3 so that "doclifter" can process it. 4605 4606Version 1.6.3beta09 [June 27, 2013] 4607 Revised example.c to illustrate use of PNG_DEFAULT_sRGB and PNG_GAMMA_MAC_18 4608 as parameters for png_set_gamma(). These have been available since 4609 libpng-1.5.4. 4610 Renamed contrib/tools/png-fix-too-far-back.c to pngfix.c and revised it 4611 to check all compressed chunks known to libpng. 4612 4613Version 1.6.3beta10 [July 5, 2013] 4614 Updated documentation to show default behavior of benign errors correctly. 4615 Only compile ARM code when PNG_READ_SUPPORTED is defined. 4616 Fixed undefined behavior in contrib/tools/pngfix.c and added new strip 4617 option. pngfix relied on undefined behavior and even a simple change from 4618 gcc to g++ caused it to fail. The new strip option 'unsafe' has been 4619 implemented and is the default if --max is given. Option names have 4620 been clarified, with --strip=transform now stripping the bKGD chunk, 4621 which was stripped previously with --strip=unused. 4622 Added all documented chunk types to pngpriv.h 4623 Unified pngfix.c source with libpng17. 4624 4625Version 1.6.3rc01 [July 11, 2013] 4626 No changes. 4627 4628Version 1.6.3 [July 18, 2013] 4629 Revised manual about changes in iTXt chunk handling made in libpng-1.6.0. 4630 Added "/* SAFE */" comments in pngrutil.c and pngrtran.c where warnings 4631 may be erroneously issued by code-checking applications. 4632 4633Version 1.6.4beta01 [August 21, 2013] 4634 Added information about png_set_options() to the manual. 4635 Delay calling png_init_filter_functions() until a row with nonzero filter 4636 is found. 4637 4638Version 1.6.4beta02 [August 30, 2013] 4639 Fixed inconsistent conditional compilation of png_chunk_unknown_handling() 4640 prototype, definition, and usage. Made it depend on 4641 PNG_HANDLE_AS_UNKNOWN_SUPPORTED everywhere. 4642 4643Version 1.6.4rc01 [September 5, 2013] 4644 No changes. 4645 4646Version 1.6.4 [September 12, 2013] 4647 No changes. 4648 4649Version 1.6.5 [September 14, 2013] 4650 Removed two stray lines of code from arm/arm_init.c. 4651 4652Version 1.6.6 [September 16, 2013] 4653 Removed two stray lines of code from arm/arm_init.c, again. 4654 4655Version 1.6.7beta01 [September 30, 2013] 4656 Revised unknown chunk code to correct several bugs in the NO_SAVE_/NO_WRITE 4657 combination 4658 Allow HANDLE_AS_UNKNOWN to work when other options are configured off. Also 4659 fixed the pngminim makefiles to work when $(MAKEFLAGS) contains stuff 4660 which terminates the make options (as by default in recent versions of 4661 Gentoo). 4662 Avoid up-cast warnings in pngvalid.c. On ARM the alignment requirements of 4663 png_modifier are greater than that of png_store and as a consequence 4664 compilation of pngvalid.c results in a warning about increased alignment 4665 requirements because of the bare cast to (png_modifier*). The code is safe, 4666 because the pointer is known to point to a stack allocated png_modifier, 4667 but this change avoids the warning. 4668 Fixed default behavior of ARM_NEON_API. If the ARM NEON API option was 4669 compiled without the CHECK option it defaulted to on, not off. 4670 Check user callback behavior in pngunknown.c. Previous versions compiled 4671 if SAVE_UNKNOWN was not available but did nothing since the callback 4672 was never implemented. 4673 Merged pngunknown.c with 1.7 version and back ported 1.7 improvements/fixes 4674 4675Version 1.6.7beta02 [October 12, 2013] 4676 Made changes for compatibility with automake 1.14: 4677 1) Added the 'compile' program to the list of programs that must be cleaned 4678 in autogen.sh 4679 2) Added 'subdir-objects' which causes .c files in sub-directories to be 4680 compiled such that the corresponding .o files are also in the 4681 sub-directory. This is because automake 1.14 warns that the 4682 current behavior of compiling to the top level directory may be removed 4683 in the future. 4684 3) Updated dependencies on pnglibconf.h to match the new .o locations and 4685 added all the files in contrib/libtests and contrib/tools that depend 4686 on pnglibconf.h 4687 4) Added 'BUILD_SOURCES = pnglibconf.h'; this is the automake recommended 4688 way of handling the dependencies of sources that are machine generated; 4689 unfortunately it only works if the user does 'make all' or 'make check', 4690 so the dependencies (3) are still required. 4691 Cleaned up (char*) casts of zlib messages. The latest version of the Intel C 4692 compiler complains about casting a string literal as (char*), so copied the 4693 treatment of z_const from the library code into pngfix.c 4694 Simplified error message code in pngunknown. The simplification has the 4695 useful side effect of avoiding a bogus warning generated by the latest 4696 version of the Intel C compiler (it objects to 4697 condition ? string-literal : string-literal). 4698 Make autogen.sh work with automake 1.13 as well as 1.14. Do this by always 4699 removing the 1.14 'compile' script but never checking for it. 4700 4701Version 1.6.7beta03 [October 19, 2013] 4702 Added ARMv8 support (James Yu <james.yu at linaro.org>). Added file 4703 arm/filter_neon_intrinsics.c; enable with -mfpu=neon. 4704 Revised pngvalid to generate size images with as many filters as it can 4705 manage, limited by the number of rows. 4706 Cleaned up ARM NEON compilation handling. The tests are now in pngpriv.h 4707 and detect the broken GCC compilers. 4708 4709Version 1.6.7beta04 [October 26, 2013] 4710 Allow clang derived from older GCC versions to use ARM intrinsics. This 4711 causes all clang builds that use -mfpu=neon to use the intrinsics code, 4712 not the assembler code. This has only been tested on iOS 7. It may be 4713 necessary to exclude some earlier clang versions but this seems unlikely. 4714 Changed NEON implementation selection mechanism. This allows assembler 4715 or intrinsics to be turned on at compile time during the build by defining 4716 PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). This macro 4717 is undefined by default and the build type is selected in pngpriv.h. 4718 4719Version 1.6.7rc01 [November 2, 2013] 4720 No changes. 4721 4722Version 1.6.7rc02 [November 7, 2013] 4723 Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char 4724 checking macros take an unsigned char argument, not a signed char. 4725 4726Version 1.6.7 [November 14, 2013] 4727 No changes. 4728 4729Version 1.6.8beta01 [November 24, 2013] 4730 Moved prototype for png_handle_unknown() in pngpriv.h outside of 4731 the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block. 4732 Added "-Wall" to CFLAGS in contrib/pngminim/*/makefile 4733 Conditionally compile some unused functions reported by -Wall in 4734 pngminim. 4735 Fixed 'minimal' builds. Various obviously useful minimal configurations 4736 don't build because of missing contrib/libtests test programs and 4737 overly complex dependencies in scripts/pnglibconf.dfa. This change 4738 adds contrib/conftest/*.dfa files that can be used in automatic build 4739 scripts to ensure that these configurations continue to build. 4740 Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder. 4741 Fixed pngvalid 'fail' function declaration on the Intel C Compiler. 4742 This reverts to the previous 'static' implementation and works round 4743 the 'unused static function' warning by using PNG_UNUSED(). 4744 4745Version 1.6.8beta02 [November 30, 2013] 4746 Removed or marked PNG_UNUSED some harmless "dead assignments" reported 4747 by clang scan-build. 4748 Changed tabs to 3 spaces in png_debug macros and changed '"%s"m' 4749 to '"%s" m' to improve portability among compilers. 4750 Changed png_free_default() to free() in pngtest.c 4751 4752Version 1.6.8rc01 [December 12, 2013] 4753 Tidied up pngfix inits and fixed pngtest no-write builds. 4754 4755Version 1.6.8rc02 [December 14, 2013] 4756 Handle zero-length PLTE chunk or NULL palette with png_error() 4757 instead of png_chunk_report(), which by default issues a warning 4758 rather than an error, leading to later reading from a NULL pointer 4759 (png_ptr->palette) in png_do_expand_palette(). This is CVE-2013-6954 4760 and VU#650142. Libpng-1.6.1 through 1.6.7 are vulnerable. 4761 Libpng-1.6.0 and earlier do not have this bug. 4762 4763Version 1.6.8 [December 19, 2013] 4764 No changes. 4765 4766Version 1.6.9beta01 [December 26, 2013] 4767 Bookkeeping: Moved functions around (no changes). Moved transform 4768 function definitions before the place where they are called so that 4769 they can be made static. Move the intrapixel functions and the 4770 grayscale palette builder out of the png?tran.c files. The latter 4771 isn't a transform function and is no longer used internally, and the 4772 former MNG specific functions are better placed in pngread/pngwrite.c 4773 Made transform implementation functions static. This makes the internal 4774 functions called by png_do_{read|write}_transformations static. On an 4775 x86-64 DLL build (Gentoo Linux) this reduces the size of the text 4776 segment of the DLL by 1208 bytes, about 0.6%. It also simplifies 4777 maintenance by removing the declarations from pngpriv.h and allowing 4778 easier changes to the internal interfaces. 4779 Rebuilt configure scripts with automake-1.14.1 and autoconf-2.69 4780 in the tar distributions. 4781 4782Version 1.6.9beta02 [January 1, 2014] 4783 Added checks for libpng 1.5 to pngvalid.c. This supports the use of 4784 this version of pngvalid in libpng 1.5 4785 Merged with pngvalid.c from libpng-1.7 changes to create a single 4786 pngvalid.c 4787 Removed #error macro from contrib/tools/pngfix.c (Thomas Klausner). 4788 Merged pngrio.c, pngtrans.c, pngwio.c, and pngerror.c with libpng-1.7.0 4789 Merged libpng-1.7.0 changes to make no-interlace configurations work 4790 with test programs. 4791 Revised pngvalid.c to support libpng 1.5, which does not support the 4792 PNG_MAXIMUM_INFLATE_WINDOW option, so #define it out when appropriate in 4793 pngvalid.c 4794 Allow unversioned links created on install to be disabled in configure. 4795 In configure builds 'make install' changes/adds links like png.h 4796 and libpng.a to point to the newly installed, versioned, files (e.g. 4797 libpng17/png.h and libpng17.a). Three new configure options and some 4798 rearrangement of Makefile.am allow creation of these links to be disabled. 4799 4800Version 1.6.9beta03 [January 10, 2014] 4801 Removed potentially misleading warning from png_check_IHDR(). 4802 4803Version 1.6.9beta04 [January 20, 2014] 4804 Updated scripts/makefile.* to use CPPFLAGS (Cosmin). 4805 Added clang attribute support (Cosmin). 4806 4807Version 1.6.9rc01 [January 28, 2014] 4808 No changes. 4809 4810Version 1.6.9rc02 [January 30, 2014] 4811 Quiet an uninitialized memory warning from VC2013 in png_get_png(). 4812 4813Version 1.6.9 [February 6, 2014] 4814 4815Version 1.6.10beta01 [February 9, 2014] 4816 Backported changes from libpng-1.7.0beta30 and beta31: 4817 Fixed a large number of instances where PNGCBAPI was omitted from 4818 function definitions. 4819 Added pngimage test program for png_read_png() and png_write_png() 4820 with two new test scripts. 4821 Removed dependence on !PNG_READ_EXPAND_SUPPORTED for calling 4822 png_set_packing() in png_read_png(). 4823 Fixed combination of ~alpha with shift. On read invert alpha, processing 4824 occurred after shift processing, which causes the final values to be 4825 outside the range that should be produced by the shift. Reversing the 4826 order on read makes the two transforms work together correctly and mirrors 4827 the order used on write. 4828 Do not read invalid sBIT chunks. Previously libpng only checked sBIT 4829 values on write, so a malicious PNG writer could therefore cause 4830 the read code to return an invalid sBIT chunk, which might lead to 4831 application errors or crashes. Such chunks are now skipped (with 4832 chunk_benign_error). 4833 Make png_read_png() and png_write_png() prototypes in png.h depend 4834 upon PNG_READ_SUPPORTED and PNG_WRITE_SUPPORTED. 4835 Support builds with unsupported PNG_TRANSFORM_* values. All of the 4836 PNG_TRANSFORM_* values are always defined in png.h and, because they 4837 are used for both read and write in some cases, it is not reliable 4838 to #if out ones that are totally unsupported. This change adds error 4839 detection in png_read_image() and png_write_image() to do a 4840 png_app_error() if the app requests something that cannot be done 4841 and it adds corresponding code to pngimage.c to handle such options 4842 by not attempting to test them. 4843 4844Version 1.6.10beta02 [February 23, 2014] 4845 Moved redefines of png_error(), png_warning(), png_chunk_error(), 4846 and png_chunk_warning() from pngpriv.h to png.h to make them visible 4847 to libpng-calling applications. 4848 Moved OS dependent code from arm/arm_init.c, to allow the included 4849 implementation of the ARM NEON discovery function to be set at 4850 build-time and provide sample implementations from the current code in the 4851 contrib/arm-neon subdirectory. The __linux__ code has also been changed to 4852 compile and link on Android by using /proc/cpuinfo, and the old linux code 4853 is in contrib/arm-neon/linux-auxv.c. The new code avoids POSIX and Linux 4854 dependencies apart from opening /proc/cpuinfo and is C90 compliant. 4855 Check for info_ptr == NULL early in png_read_end() so we don't need to 4856 run all the png_handle_*() and depend on them to return if info_ptr == NULL. 4857 This improves the performance of png_read_end(png_ptr, NULL) and makes 4858 it more robust against future programming errors. 4859 Check for __has_extension before using it in pngconf.h, to 4860 support older Clang versions (Jeremy Sequoia). 4861 Treat CRC error handling with png_set_crc_action(), instead of with 4862 png_set_benign_errors(), which has been the case since libpng-1.6.0beta18. 4863 Use a user warning handler in contrib/gregbook/readpng2.c instead of default, 4864 so warnings will be put on stderr even if libpng has CONSOLE_IO disabled. 4865 Added png_ptr->process_mode = PNG_READ_IDAT_MODE in png_push_read_chunk 4866 after recognizing the IDAT chunk, which avoids an infinite loop while 4867 reading a datastream whose first IDAT chunk is of zero-length. 4868 This fixes CERT VU#684412 and CVE-2014-0333. 4869 Don't recognize known sRGB profiles as sRGB if they have been hacked, 4870 but don't reject them and don't issue a copyright violation warning. 4871 4872Version 1.6.10beta03 [February 25, 2014] 4873 Moved some documentation from png.h to libpng.3 and libpng-manual.txt 4874 Minor editing of contrib/arm-neon/README and contrib/examples/*.c 4875 4876Version 1.6.10rc01 [February 27, 2014] 4877 Fixed typos in the manual and in scripts/pnglibconf.dfa (CFLAGS -> CPPFLAGS 4878 and PNG_USR_CONFIG -> PNG_USER_CONFIG). 4879 4880Version 1.6.10rc02 [February 28, 2014] 4881 Removed unreachable return statement after png_chunk_error() 4882 in pngrutil.c 4883 4884Version 1.6.10rc03 [March 4, 2014] 4885 Un-deprecated png_data_freer(). 4886 4887Version 1.6.10 [March 6, 2014] 4888 No changes. 4889 4890Version 1.6.11beta01 [March 17, 2014] 4891 Use "if (value != 0)" instead of "if (value)" consistently. 4892 Changed ZlibSrcDir from 1.2.5 to 1.2.8 in projects/vstudio. 4893 Moved configuration information from the manual to the INSTALL file. 4894 4895Version 1.6.11beta02 [April 6, 2014] 4896 Removed #if/#else/#endif from inside two pow() calls in pngvalid.c because 4897 they were handled improperly by Portland Group's PGI-14.1 - PGI-14.3 4898 when using its "__builtin_pow()" function. 4899 Silence 'unused parameter' build warnings (Cosmin Truta). 4900 $(CP) is now used alongside $(RM_F). Also, use 'copy' instead of 'cp' 4901 where applicable, and applied other minor makefile changes (Cosmin). 4902 Don't warn about invalid dimensions exceeding user limits (Cosmin). 4903 Allow an easy replacement of the default pre-built configuration 4904 header with a custom header, via the make PNGLIBCONF_H_PREBUILT 4905 macro (Cosmin). 4906 4907Version 1.6.11beta03 [April 6, 2014] 4908 Fixed a typo in pngrutil.c, introduced in libpng-1.5.6, that interferes 4909 with "blocky" expansion of sub-8-bit interlaced PNG files (Eric Huss). 4910 Optionally use __builtin_bswap16() in png_do_swap(). 4911 4912Version 1.6.11beta04 [April 19, 2014] 4913 Made progressive reading of interlaced images consistent with the 4914 behavior of the sequential reader and consistent with the manual, by 4915 moving some code out of the PNG_READ_INTERLACING_SUPPORTED blocks. The 4916 row_callback now receives the proper pass number and unexpanded rows, when 4917 png_combine_row() isn't built or used, and png_set_interlace_handling() 4918 is not called. 4919 Allow PNG_sRGB_PROFILE_CHECKING = (-1) to mean no sRGB profile checking. 4920 4921Version 1.6.11beta05 [April 26, 2014] 4922 Do not reject ICC V2 profiles that lack padding (Kai-Uwe Behrmann). 4923 Relocated closing bracket of the sRGB profile test loop to avoid getting 4924 "Not recognizing known sRGB profile that has been edited" warning for 4925 ICC V2 profiles that lack the MD5 signature in the profile header. 4926 4927Version 1.6.11beta06 [May 19, 2014] 4928 Added PNG_SKIP_sRGB_CHECK_PROFILE choice for png_set_option(). 4929 4930Version 1.6.11rc01 [May 27, 2014] 4931 No changes. 4932 4933Version 1.6.11rc02 [June 3, 2014] 4934 Test ZLIB_VERNUM instead of PNG_ZLIB_VERNUM in contrib/tools/pngfix.c 4935 4936Version 1.6.11 [June 5, 2014] 4937 No changes. 4938 4939Version 1.6.12rc01 [June 6, 2014] 4940 Relocated new code from 1.6.11beta06 in png.c to a point after the 4941 declarations (Max Stepin). 4942 4943Version 1.6.12rc02 [June 7, 2014] 4944 Changed file permissions of contrib/tools/intgamma.sh, 4945 test-driver, and compile from 0644 to 0755 (Cosmin). 4946 4947Version 1.6.12rc03 [June 8, 2014] 4948 Ensure "__has_attribute()" macro exists before trying to use it with 4949 old clang compilers (MacPorts Ticket #43939). 4950 4951Version 1.6.12 [June 12, 2014] 4952 No changes. 4953 4954Version 1.6.13beta01 [July 4, 2014] 4955 Quieted -Wsign-compare and -Wclobber compiler warnings in 4956 contrib/pngminus/*.c 4957 Added "(void) png_ptr;" where needed in contrib/gregbook to quiet 4958 compiler complaints about unused pointers. 4959 Split a long output string in contrib/gregbook/rpng2-x.c. 4960 Added "PNG_SET_OPTION" requirement for sRGB chunk support to pnglibconf.dfa, 4961 Needed for write-only support (John Bowler). 4962 Changed "if defined(__ARM_NEON__)" to 4963 "if (defined(__ARM_NEON__) || defined(__ARM_NEON))" (James Wu). 4964 Fixed clang no-warning builds: png_digit was defined but never used. 4965 4966Version 1.6.13beta02 [July 21, 2014] 4967 Fixed an incorrect separator ("/" should be "\") in scripts/makefile.vcwin32 4968 (bug report from Wolfgang S. Kechel). Bug was introduced in libpng-1.6.11. 4969 Also fixed makefile.bc32, makefile.bor, makefile.msc, makefile.intel, and 4970 makefile.tc3 similarly. 4971 4972Version 1.6.13beta03 [August 3, 2014] 4973 Removed scripts/makefile.elf. It has not worked since libpng-1.5.0beta14 4974 due to elimination of the PNG_FUNCTION_EXPORT and PNG_DATA_EXPORT 4975 definitions from pngconf.h. 4976 Ensure that CMakeLists.txt makes the target "lib" directory before making 4977 symbolic link into it (SourceForge bug report #226 by Rolf Timmermans). 4978 4979Version 1.6.13beta04 [August 8, 2014] 4980 Added opinion that the ECCN (Export Control Classification Number) for 4981 libpng is EAR99 to the README file. 4982 Eliminated use of "$<" in makefile explicit rules, when copying 4983 $PNGLIBCONF_H_PREBUILT. This does not work on some versions of make; 4984 bug introduced in libpng version 1.6.11. 4985 4986Version 1.6.13rc01 [August 14, 2014] 4987 Made "ccopts" agree with "CFLAGS" in scripts/makefile.hp* and makefile.*sunu 4988 4989Version 1.6.13 [August 21, 2014] 4990 No changes. 4991 4992Version 1.6.14beta01 [September 14, 2014] 4993 Guard usage of png_ptr->options with #ifdef PNG_SET_OPTION_SUPPORTED. 4994 Do not build contrib/tools/pngfix.c when PNG_SETJMP_NOT_SUPPORTED, 4995 to allow "make" to complete without setjmp support (bug report by 4996 Claudio Fontana) 4997 Add "#include <setjmp.h>" to contrib/tools/pngfix.c (John Bowler) 4998 4999Version 1.6.14beta02 [September 18, 2014] 5000 Use nanosleep() instead of usleep() in contrib/gregbook/rpng2-x.c 5001 because usleep() is deprecated. 5002 Define usleep() in contrib/gregbook/rpng2-x.c if not already defined 5003 in unistd.h and nanosleep() is not available; fixes error introduced 5004 in libpng-1.6.13. 5005 Disable floating point exception handling in pngvalid.c when 5006 PNG_FLOATING_ARITHMETIC is not supported (bug report by "zootus 5007 at users.sourceforge.net"). 5008 5009Version 1.6.14beta03 [September 19, 2014] 5010 Define FE_DIVBYZERO, FE_INVALID, and FE_OVERFLOW in pngvalid.c if not 5011 already defined. Revert floating point exception handling in pngvalid.c 5012 to version 1.6.14beta01 behavior. 5013 5014Version 1.6.14beta04 [September 27, 2014] 5015 Fixed incorrect handling of the iTXt compression flag in pngrutil.c 5016 (bug report by Shunsaku Hirata). Bug was introduced in libpng-1.6.0. 5017 5018Version 1.6.14beta05 [October 1, 2014] 5019 Added "option READ_iCCP enables READ_COMPRESSED_TEXT" to pnglibconf.dfa 5020 5021Version 1.6.14beta06 [October 5, 2014] 5022 Removed unused "text_len" parameter from private function png_write_zTXt(). 5023 Conditionally compile some code in png_deflate_claim(), when 5024 PNG_WARNINGS_SUPPORTED and PNG_ERROR_TEXT_SUPPORTED are disabled. 5025 Replaced repeated code in pngpread.c with PNG_PUSH_SAVE_BUFFER_IF_FULL. 5026 Added "chunk iTXt enables TEXT" and "chunk zTXt enables TEXT" 5027 to pnglibconf.dfa. 5028 Removed "option READ_COMPRESSED_TEXT enables READ_TEXT" from pnglibconf.dfa, 5029 to make it possible to configure a libpng that supports iCCP but not TEXT. 5030 5031Version 1.6.14beta07 [October 7, 2014] 5032 Removed "option WRITE_COMPRESSED_TEXT enables WRITE_TEXT" from pnglibconf.dfa 5033 Only mark text chunks as written after successfully writing them. 5034 5035Version 1.6.14rc01 [October 15, 2014] 5036 Fixed some typos in comments. 5037 5038Version 1.6.14rc02 [October 17, 2014] 5039 Changed png_convert_to_rfc_1123() to png_convert_to_rfc_1123_buffer() 5040 in the manual, to reflect the change made in libpng-1.6.0. 5041 Updated README file to explain that direct access to the png_struct 5042 and info_struct members has not been permitted since libpng-1.5.0. 5043 5044Version 1.6.14 [October 23, 2014] 5045 No changes. 5046 5047Version 1.6.15beta01 [October 29, 2014] 5048 Changed "if (!x)" to "if (x == 0)" and "if (x)" to "if (x != 0)" 5049 Simplified png_free_data(). 5050 Added missing "ptr = NULL" after some instances of png_free(). 5051 5052Version 1.6.15beta02 [November 1, 2014] 5053 Changed remaining "if (!x)" to "if (x == 0)" and "if (x)" to "if (x != 0)" 5054 5055Version 1.6.15beta03 [November 3, 2014] 5056 Added PNG_USE_ARM_NEON configuration flag (Marcin Juszkiewicz). 5057 5058Version 1.6.15beta04 [November 4, 2014] 5059 Removed new PNG_USE_ARM_NEON configuration flag and made a one-line 5060 revision to configure.ac to support ARM on aarch64 instead (John Bowler). 5061 5062Version 1.6.15beta05 [November 5, 2014] 5063 Use png_get_libpng_ver(NULL) instead of PNG_LIBPNG_VER_STRING in 5064 example.c, pngtest.c, and applications in the contrib directory. 5065 Fixed an out-of-range read in png_user_version_check() (Bug report from 5066 Qixue Xiao, CVE-2015-8540). 5067 Simplified and future-proofed png_user_version_check(). 5068 Fixed GCC unsigned int->float warnings. Various versions of GCC 5069 seem to generate warnings when an unsigned value is implicitly 5070 converted to double. This is probably a GCC bug but this change 5071 avoids the issue by explicitly converting to (int) where safe. 5072 Free all allocated memory in pngimage. The file buffer cache was left 5073 allocated at the end of the program, harmless but it causes memory 5074 leak reports from clang. 5075 Fixed array size calculations to avoid warnings. At various points 5076 in the code the number of elements in an array is calculated using 5077 sizeof. This generates a compile time constant of type (size_t) which 5078 is then typically assigned to an (unsigned int) or (int). Some versions 5079 of GCC on 64-bit systems warn about the apparent narrowing, even though 5080 the same compiler does apparently generate the correct, in-range, 5081 numeric constant. This adds appropriate, safe, casts to make the 5082 warnings go away. 5083 5084Version 1.6.15beta06 [November 6, 2014] 5085 Reverted use png_get_libpng_ver(NULL) instead of PNG_LIBPNG_VER_STRING 5086 in the manual, example.c, pngtest.c, and applications in the contrib 5087 directory. It was incorrect advice. 5088 5089Version 1.6.15beta07 [November 7, 2014] 5090 Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is 5091 needed by png_reciprocal2(). 5092 Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and 5093 png_do_swap(). 5094 Changed all "#endif /* PNG_FEATURE_SUPPORTED */" to "#endif /* FEATURE */" 5095 5096Version 1.6.15beta08 [November 8, 2014] 5097 More housecleaning in *.h 5098 5099Version 1.6.15rc01 [November 13, 2014] 5100 5101Version 1.6.15rc02 [November 14, 2014] 5102 The macros passed in the command line to Borland make were ignored if 5103 similarly-named macros were already defined in makefiles. This behavior 5104 is different from POSIX make and other make programs. Surround the 5105 macro definitions with ifndef guards (Cosmin). 5106 5107Version 1.6.15rc03 [November 16, 2014] 5108 Added "-D_CRT_SECURE_NO_WARNINGS" to CFLAGS in scripts/makefile.vcwin32. 5109 Removed the obsolete $ARCH variable from scripts/makefile.darwin. 5110 5111Version 1.6.15 [November 20, 2014] 5112 No changes. 5113 5114Version 1.6.16beta01 [December 14, 2014] 5115 Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that 5116 don't do alignment correctly. 5117 Revised Makefile.am and scripts/symbols.dfn to work with MinGW/MSYS 5118 (Bob Friesenhahn). 5119 5120Version 1.6.16beta02 [December 15, 2014] 5121 Revised Makefile.am and scripts/*.dfn again to work with MinGW/MSYS; 5122 renamed scripts/*.dfn to scripts/*.c (John Bowler). 5123 5124Version 1.6.16beta03 [December 21, 2014] 5125 Quiet a "comparison always true" warning in pngstest.c (John Bowler). 5126 5127Version 1.6.16rc01 [December 21, 2014] 5128 Restored a test on width that was removed from png.c at libpng-1.6.9 5129 (Bug report by Alex Eubanks, CVE-2015-0973). 5130 5131Version 1.6.16rc02 [December 21, 2014] 5132 Undid the update to pngrutil.c in 1.6.16rc01. 5133 5134Version 1.6.16rc03 [December 21, 2014] 5135 Fixed an overflow in png_combine_row() with very wide interlaced images 5136 (Bug report and fix by John Bowler, CVE-2014-9495). 5137 5138Version 1.6.16 [December 22, 2014] 5139 No changes. 5140 5141Version 1.6.17beta01 [January 29, 2015] 5142 Removed duplicate PNG_SAFE_LIMITS_SUPPORTED handling from pngconf.h 5143 Corrected the width limit calculation in png_check_IHDR(). 5144 Removed user limits from pngfix. Also pass NULL pointers to 5145 png_read_row to skip the unnecessary row de-interlace stuff. 5146 Added testing of png_set_packing() to pngvalid.c 5147 Regenerated configure scripts in the *.tar distributions with libtool-2.4.4 5148 Implement previously untested cases of libpng transforms in pngvalid.c 5149 Fixed byte order in png_do_read_filler() with 16-bit input. Previously 5150 the high and low bytes of the filler, from png_set_filler() or from 5151 png_set_add_alpha(), were read in the wrong order. 5152 Made the check for out-of-range values in png_set_tRNS() detect 5153 values that are exactly 2^bit_depth, and work on 16-bit platforms. 5154 Merged some parts of libpng-1.6.17beta01 and libpng-1.7.0beta47. 5155 Added #ifndef __COVERITY__ where needed in png.c, pngrutil.c and 5156 pngset.c to avoid warnings about dead code. 5157 Added "& 0xff" to many instances of expressions that are typecast 5158 to (png_byte), to avoid Coverity warnings. 5159 5160Version 1.6.17beta02 [February 7, 2015] 5161 Work around one more Coverity-scan dead-code warning. 5162 Do not build png_product2() when it is unused. 5163 5164Version 1.6.17beta03 [February 17, 2015] 5165 Display user limits in the output from pngtest. 5166 Eliminated the PNG_SAFE_LIMITS macro and restored the 1-million-column 5167 and 1-million-row default limits in pnglibconf.dfa, that can be reset 5168 by the user at build time or run time. This provides a more robust 5169 defense against DOS and as-yet undiscovered overflows. 5170 5171Version 1.6.17beta04 [February 21, 2015] 5172 Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default. 5173 Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins). 5174 Rebuilt configure scripts with automake-1.15 and libtool-2.4.6 5175 5176Version 1.6.17beta05 [February 25, 2015] 5177 Restored compiling of png_reciprocal2 with PNG_NO_16BIT. 5178 5179Version 1.6.17beta06 [February 27, 2015] 5180 Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block 5181 of png.h. 5182 Avoid runtime checks when converting integer to png_byte with 5183 Visual Studio (Sergey Kosarevsky) 5184 5185Version 1.6.17rc01 [March 4, 2015] 5186 No changes. 5187 5188Version 1.6.17rc02 [March 9, 2015] 5189 Removed some comments that the configure script did not handle 5190 properly from scripts/pnglibconf.dfa and pnglibconf.h.prebuilt. 5191 Free the unknown_chunks structure even when it contains no data. 5192 5193Version 1.6.17rc03 [March 12, 2015] 5194 Updated CMakeLists.txt to add OSX framework, change YES/NO to ON/OFF 5195 for consistency, and remove some useless tests (Alexey Petruchik). 5196 5197Version 1.6.17rc04 [March 16, 2015] 5198 Remove pnglibconf.h, pnglibconf.c, and pnglibconf.out instead of 5199 pnglibconf.* in "make clean" (Cosmin). 5200 Fix bug in calculation of maxbits, in png_write_sBIT, introduced 5201 in libpng-1.6.17beta01 (John Bowler). 5202 5203Version 1.6.17rc05 [March 21, 2015] 5204 Define PNG_FILTER_* and PNG_FILTER_VALUE_* in png.h even when WRITE 5205 is not supported (John Bowler). This fixes an error introduced in 5206 libpng-1.6.17beta06. 5207 Reverted "& 0xff" additions of version 1.6.17beta01. Libpng passes 5208 the Coverity scan without them. 5209 5210Version 1.6.17rc06 [March 23, 2015] 5211 Remove pnglibconf.dfn and pnglibconf.pre with "make clean". 5212 Reformatted some "&0xff" instances to "& 0xff". 5213 Fixed simplified 8-bit-linear to sRGB alpha. The calculated alpha 5214 value was wrong. It's not clear if this affected the final stored 5215 value; in the obvious code path the upper and lower 8-bits of the 5216 alpha value were identical and the alpha was truncated to 8-bits 5217 rather than dividing by 257 (John Bowler). 5218 5219Version 1.6.17 [March 26, 2015] 5220 No changes. 5221 5222Version 1.6.18beta01 [April 1, 2015] 5223 Removed PNG_SET_CHUNK_[CACHE|MALLOC]_LIMIT_SUPPORTED macros. They 5224 have been combined with PNG_SET_USER_LIMITS_SUPPORTED (resolves 5225 bug report by Andrew Church). 5226 Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c. This 5227 fixes some arithmetic errors that caused some tests to fail on 5228 some 32-bit platforms (Bug reports by Peter Breitenlohner [i686] 5229 and Petr Gajdos [i586]). 5230 5231Version 1.6.18beta02 [April 26, 2015] 5232 Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler 5233 (Bug report by Viktor Szakats). 5234 5235Version 1.6.18beta03 [May 6, 2015] 5236 Replaced "unexpected" with an integer (0xabadca11) in pngset.c 5237 where a long was expected, to avoid a compiler warning when PNG_DEBUG > 1. 5238 Added contrib/examples/simpleover.c, to demonstrate how to handle 5239 alpha compositing of multiple images, using the "simplified API" 5240 and an example PNG generation tool, contrib/examples/genpng.c 5241 (John Bowler). 5242 5243Version 1.6.18beta04 [May 20, 2015] 5244 PNG_RELEASE_BUILD replaces tests where the code depended on the build base 5245 type and can be defined on the command line, allowing testing in beta 5246 builds (John Bowler). 5247 Avoid Coverity issue 80858 (REVERSE NULL) in pngtest.c PNG_DEBUG builds. 5248 Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug 5249 report from Christopher Ferris). 5250 5251Version 1.6.18beta05 [May 31, 2015] 5252 Backport filter selection code from libpng-1.7.0beta51, to combine 5253 sub_row, up_row, avg_row, and paeth_row into try_row and tst_row. 5254 Changed png_voidcast(), etc., to voidcast(), etc., in contrib/tools/pngfix.c 5255 to avoid confusion with the libpng private macros. 5256 Fixed old cut&paste bug in the weighted filter selection code in 5257 pngwutil.c, introduced in libpng-0.95, March 1997. 5258 5259Version 1.6.18beta06 [June 1, 2015] 5260 Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the 5261 compiled library size. It never worked properly and as far as we can 5262 tell, no one uses it. The png_set_filter_heuristics() and 5263 png_set_filter_heuristics_fixed() APIs are retained but deprecated 5264 and do nothing. 5265 5266Version 1.6.18beta07 [June 6, 2015] 5267 Removed non-working progressive reader 'skip' function. This 5268 function has apparently never been used. It was implemented 5269 to support back-door modification of png_struct in libpng-1.4.x 5270 but (because it does nothing and cannot do anything) was apparently 5271 never tested (John Bowler). 5272 Fixed cexcept.h in which GCC 5 now reports that one of the auto 5273 variables in the Try macro needs to be volatile to prevent value 5274 being lost over the setjmp (John Bowler). 5275 Fixed NO_WRITE_FILTER and -Wconversion build breaks (John Bowler). 5276 Fix g++ build breaks (John Bowler). 5277 Quieted some Coverity issues in pngfix.c, png-fix-itxt.c, pngvalid.c, 5278 pngstest.c, and pngimage.c. Most seem harmless, but png-fix-itxt 5279 would only work with iTXt chunks with length 255 or less. 5280 Added #ifdef's to contrib/examples programs so people don't try 5281 to compile them without the minimum required support enabled 5282 (suggested by Flavio Medeiros). 5283 5284Version 1.6.18beta08 [June 30, 2015] 5285 Eliminated the final two Coverity defects (insecure temporary file 5286 handling in contrib/libtests/pngstest.c; possible overflow of 5287 unsigned char in contrib/tools/png-fix-itxt.c). To use the "secure" 5288 file handling, define PNG_USE_MKSTEMP, otherwise "tmpfile()" will 5289 be used. 5290 Removed some unused WEIGHTED_FILTER macros from png.h and pngstruct.h 5291 5292Version 1.6.18beta09 [July 5, 2015] 5293 Removed some useless typecasts from contrib/tools/png-fix-itxt.c 5294 Fixed a new signed-unsigned comparison in pngrtran.c (Max Stepin). 5295 Replaced arbitrary use of 'extern' with #define PNG_LINKAGE_*. To 5296 preserve API compatibility, the new defines all default to "extern" 5297 (requested by Jan Nijtmans). 5298 5299Version 1.6.18rc01 [July 9, 2015] 5300 Belatedly added Mans Rullgard and James Yu to the list of Contributing 5301 Authors. 5302 5303Version 1.6.18rc02 [July 12, 2015] 5304 Restored unused FILTER_HEURISTIC macros removed at libpng-1.6.18beta08 5305 to png.h to avoid compatibility warnings. 5306 5307Version 1.6.18rc03 [July 15, 2015] 5308 Minor changes to the man page 5309 5310Version 1.6.18 [July 23, 2015] 5311 No changes. 5312 5313Version 1.6.19beta01 [July 30, 2015] 5314 Updated obsolete information about the simplified API macros in the 5315 manual pages (Bug report by Arc Riley). 5316 Avoid potentially dereferencing NULL info_ptr in png_info_init_3(). 5317 Rearranged png.h to put the major sections in the same order as 5318 in libpng17. 5319 Eliminated unused PNG_COST_SHIFT, PNG_WEIGHT_SHIFT, PNG_COST_FACTOR, and 5320 PNG_WEIGHT_FACTOR macros. 5321 Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler 5322 (Bug report by Viktor Szakats). Several warnings remain and are 5323 unavoidable, where we test for overflow. 5324 Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c 5325 Fixed uninitialized variable in contrib/gregbook/rpng2-x.c 5326 5327Version 1.6.19beta02 [August 19, 2015] 5328 Moved config.h.in~ from the "libpng_autotools_files" list to the 5329 "libpng_autotools_extra" list in autogen.sh because it was causing a 5330 false positive for missing files (bug report by Robert C. Seacord). 5331 Removed unreachable "break" statements in png.c, pngread.c, and pngrtran.c 5332 to suppress clang warnings (Bug report by Viktor Szakats). 5333 Fixed some bad links in the man page. 5334 Changed "n bit" to "n-bit" in comments. 5335 Added signed/unsigned 16-bit safety net. This removes the dubious 5336 0x8000 flag definitions on 16-bit systems. They aren't supported 5337 yet the defs *probably* work, however it seems much safer to do this 5338 and be advised if anyone, contrary to advice, is building libpng 1.6 5339 on a 16-bit system. It also adds back various switch default clauses 5340 for GCC; GCC errors out if they are not present (with an appropriately 5341 high level of warnings). 5342 Safely convert num_bytes to a png_byte in png_set_sig_bytes() (Robert 5343 Seacord). 5344 Fixed the recently reported 1's complement security issue by replacing 5345 the value that is illegal in the PNG spec, in both signed and unsigned 5346 values, with 0. Illegal unsigned values (anything greater than or equal 5347 to 0x80000000) can still pass through, but since these are not illegal 5348 in ANSI-C (unlike 0x80000000 in the signed case) the checking that 5349 occurs later can catch them (John Bowler). 5350 5351Version 1.6.19beta03 [September 26, 2015] 5352 Fixed png_save_int_32 when int is not 2's complement (John Bowler). 5353 Updated libpng16 with all the recent test changes from libpng17, 5354 including changes to pngvalid.c to ensure that the original, 5355 distributed, version of contrib/visupng/cexcept.h can be used 5356 (John Bowler). 5357 pngvalid contains the correction to the use of SAVE/STORE_ 5358 UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7. More 5359 tests contain the --strict option to detect warnings and the 5360 pngvalid-standard test has been corrected so that it does not 5361 turn on progressive-read. There is a separate test which does 5362 that. (John Bowler) 5363 Also made some signed/unsigned fixes. 5364 Make pngstest error limits version specific. Splitting the machine 5365 generated error structs out to a file allows the values to be updated 5366 without changing pngstest.c itself. Since libpng 1.6 and 1.7 have 5367 slightly different error limits this simplifies maintenance. The 5368 makepngs.sh script has also been updated to more accurately reflect 5369 current problems in libpng 1.7 (John Bowler). 5370 Incorporated new test PNG files into make check. tests/pngstest-* 5371 are changed so that the new test files are divided into 8 groups by 5372 gamma and alpha channel. These tests have considerably better code 5373 and pixel-value coverage than contrib/pngsuite; however,coverage is 5374 still incomplete (John Bowler). 5375 Removed the '--strict' in 1.6 because of the double-gamma-correction 5376 warning, updated pngstest-errors.h for the errors detected with the 5377 new contrib/testspngs PNG test files (John Bowler). 5378 5379Version 1.6.19beta04 [October 15, 2015] 5380 Worked around rgb-to-gray issues in libpng 1.6. The previous 5381 attempts to ignore the errors in the code aren't quite enough to 5382 deal with the 'channel selection' encoding added to libpng 1.7; abort. 5383 pngvalid.c is changed to drop this encoding in prior versions. 5384 Fixed 'pow' macros in pngvalid.c. It is legal for 'pow' to be a 5385 macro, therefore the argument list cannot contain preprocessing 5386 directives. Make sure pow is a function where this happens. This is 5387 a minimal safe fix, the issue only arises in non-performance-critical 5388 code (bug report by Curtis Leach, fix by John Bowler). 5389 Added sPLT support to pngtest.c 5390 5391Version 1.6.19rc01 [October 23, 2015] 5392 No changes. 5393 5394Version 1.6.19rc02 [October 31, 2015] 5395 Prevent setting or writing over-length PLTE chunk (Cosmin Truta). 5396 Silently truncate over-length PLTE chunk while reading. 5397 Libpng incorrectly calculated the output rowbytes when the application 5398 decreased either the number of channels or the bit depth (or both) in 5399 a user transform. This was safe; libpng overallocated buffer space 5400 (potentially by quite a lot; up to 4 times the amount required) but, 5401 from 1.5.4 on, resulted in a png_error (John Bowler). 5402 5403Version 1.6.19rc03 [November 3, 2015] 5404 Fixed some inconsequential cut-and-paste typos in png_set_cHRM_XYZ_fixed(). 5405 Clarified COPYRIGHT information to state explicitly that versions 5406 are derived from previous versions. 5407 Removed much of the long list of previous versions from png.h and 5408 libpng.3. 5409 5410Version 1.6.19rc04 [November 5, 2015] 5411 Fixed new bug with CRC error after reading an over-length palette 5412 (bug report by Cosmin Truta) (CVE-2015-8126). 5413 5414Version 1.6.19 [November 12, 2015] 5415 Cleaned up coding style in png_handle_PLTE(). 5416 5417Version 1.6.20beta01 [November 20, 2015] 5418 Avoid potential pointer overflow/underflow in png_handle_sPLT() and 5419 png_handle_pCAL() (Bug report by John Regehr). 5420 5421Version 1.6.20beta02 [November 23, 2015] 5422 Fixed incorrect implementation of png_set_PLTE() that uses png_ptr 5423 not info_ptr, that left png_set_PLTE() open to the CVE-2015-8126 5424 vulnerability. Fixes CVE-2015-8472. 5425 5426Version 1.6.20beta03 [November 24, 2015] 5427 Backported tests from libpng-1.7.0beta69. 5428 5429Version 1.6.20rc01 [November 26, 2015] 5430 Fixed an error in handling of bad zlib CMINFO field in pngfix, found by 5431 American Fuzzy Lop, reported by Brian Carpenter. inflate() doesn't 5432 immediately fault a bad CMINFO field; instead a 'too far back' error 5433 happens later (at least some times). pngfix failed to limit CMINFO to 5434 the allowed values but then assumed that window_bits was in range, 5435 triggering an assert. The bug is mostly harmless; the PNG file cannot 5436 be fixed. 5437 5438Version 1.6.20rc02 [November 29, 2015] 5439 In libpng 1.6 zlib initialization was changed to use the window size 5440 in the zlib stream, not a fixed value. This causes some invalid images, 5441 where CINFO is too large, to display 'correctly' if the rest of the 5442 data is valid. This provides a workaround for zlib versions where the 5443 error arises (ones that support the API change to use the window size 5444 in the stream). 5445 5446Version 1.6.20 [December 3, 2015] 5447 No changes. 5448 5449Version 1.6.21beta01 [December 11, 2015] 5450 Fixed syntax "$(command)" in tests/pngstest that some shells other than 5451 bash could not parse (Bug report by Nelson Beebe). Use `command` instead. 5452 5453Version 1.6.21beta02 [December 14, 2015] 5454 Moved png_check_keyword() from pngwutil.c to pngset.c 5455 Removed LE/BE dependencies in pngvalid, to 'fix' the current problem 5456 in the BigEndian tests by not testing it, making the BE code the same 5457 as the LE version. 5458 Fixes to pngvalid for various reduced build configurations (eliminate unused 5459 statics) and a fix for the case in rgb_to_gray when the digitize option 5460 reduces graylo to 0, producing a large error. 5461 5462Version 1.6.21beta03 [December 18, 2015] 5463 Widened the 'limit' check on the internally calculated error limits in 5464 the 'DIGITIZE' case (the code used prior to 1.7 for rgb_to_gray error 5465 checks) and changed the check to only operate in non-release builds 5466 (base build type not RC or RELEASE.) 5467 Fixed undefined behavior in pngvalid.c, undefined because 5468 (png_byte) << shift is undefined if it changes the signed bit 5469 (because png_byte is promoted to int). The libpng exported functions 5470 png_get_uint_32 and png_get_uint_16 handle this. (Bug reported by 5471 David Drysdale as a result of reports from UBSAN in clang 3.8). 5472 This changes pngvalid to use BE random numbers; this used to produce 5473 errors but these should not be fixed as a result of the previous changes. 5474 5475Version 1.6.21rc01 [January 4, 2016] 5476 In projects/vstudio, combined readme.txt and WARNING into README.txt 5477 5478Version 1.6.21rc02 [January 7, 2016] 5479 Relocated assert() in contrib/tools/pngfix.c, bug found by American 5480 Fuzzy Lop, reported by Brian Carpenter. 5481 Marked 'limit' UNUSED in transform_range_check(). This only affects 5482 release builds. 5483 5484Version 1.6.21 [January 15, 2016] 5485 Worked around a false-positive Coverity issue in pngvalid.c. 5486 5487Version 1.6.22beta01 [January 23, 2016] 5488 Changed PNG_USE_MKSTEMP to __COVERITY__ to select alternate 5489 "tmpfile()" implementation in contrib/libtests/pngstest.c 5490 Fixed NO_STDIO build of pngunknown.c to skip calling png_init_io() 5491 if there is no stdio.h support. 5492 Added a png_image_write_to_memory() API and a number of assist macros 5493 to allow an application that uses the simplified API write to bypass 5494 stdio and write directly to memory. 5495 Added some warnings (png.h) and some check code to detect *possible* 5496 overflow in the ROW_STRIDE and simplified image SIZE macros. This 5497 disallows image width/height/format that *might* overflow. This is 5498 a quiet API change that limits in-memory image size (uncompressed) to 5499 less than 4GByte and image row size (stride) to less than 2GByte. 5500 Revised workaround for false-positive Coverity issue in pngvalid.c. 5501 5502Version 1.6.22beta02 [February 8, 2016] 5503 Only use exit(77) in configure builds. 5504 Corrected error in PNG_IMAGE_PNG_SIZE_MAX. This new macro underreported 5505 the palette size because it failed to take into account that the memory 5506 palette has to be expanded to full RGB when it is written to PNG. 5507 Updated CMakeLists.txt, added supporting scripts/gen*.cmake.in 5508 and test.cmake.in (Roger Leigh). 5509 Relaxed limit checks on gamma values in pngrtran.c. As suggested in 5510 the comments gamma values outside the range currently permitted 5511 by png_set_alpha_mode are useful for HDR data encoding. These values 5512 are already permitted by png_set_gamma so it is reasonable caution to 5513 extend the png_set_alpha_mode range as HDR imaging systems are starting 5514 to emerge. 5515 5516Version 1.6.22beta03 [March 9, 2016] 5517 Added a common-law trademark notice and export control information 5518 to the LICENSE file, png.h, and the man page. 5519 Restored "& 0xff" in png_save_uint_16() and png_save_uint_32() that 5520 were accidentally removed from libpng-1.6.17. 5521 Changed PNG_INFO_cHNK and PNG_FREE_cHNK from 0xnnnn to 0xnnnnU in png.h 5522 (Robert C. Seacord). 5523 Removed dubious "#if INT_MAX" test from png.h that was added to 5524 libpng-1.6.19beta02 (John Bowler). 5525 Add ${INCLUDES} in scripts/genout.cmake.in (Bug report by Nixon Kwok). 5526 Updated LICENSE to say files in the contrib directory are not 5527 necessarily under the libpng license, and that some makefiles have 5528 other copyright owners. 5529 Added INTEL-SSE2 support (Mike Klein and Matt Sarett, Google, Inc.). 5530 Made contrib/libtests/timepng more robust. The code no longer gives 5531 up/fails on invalid PNG data, it just skips it (with error messages). 5532 The code no longer fails on PNG files with data beyond IEND. Options 5533 exist to use png_read_png (reading the whole image, not by row) and, in 5534 that case, to apply any of the supported transforms. This makes for 5535 more realistic testing; the decoded data actually gets used in a 5536 meaningful fashion (John Bowler). 5537 Fixed some misleading indentation (Krishnaraj Bhat). 5538 5539Version 1.6.22beta04 [April 5, 2016] 5540 Force GCC compilation to C89 if needed (Dagobert Michelsen). 5541 SSE filter speed improvements for bpp=3: 5542 memcpy-free implementations of load3() / store3(). 5543 call load3() only when needed at the end of a scanline. 5544 5545Version 1.6.22beta05 [April 27, 2016] 5546 Added PNG_FAST_FILTERS macro (defined as 5547 PNG_FILTER_NONE|PNG_FILTER_SUB|PNG_FILTER_UP). 5548 Various fixes for contrib/libtests/timepng.c 5549 Moved INTEL-SSE code from pngpriv.h into contrib/intel/intel_sse.patch. 5550 Fixed typo (missing underscore) in #define PNG_READ_16_TO_8_SUPPORTED 5551 (Bug report by Y.Ohashik). 5552 5553Version 1.6.22beta06 [May 5, 2016] 5554 Rebased contrib/intel_sse.patch. 5555 Quieted two Coverity issues in contrib/libtests/timepng.c. 5556 Fixed issues with scripts/genout.cmake.in (David Capello, Nixon Kwok): 5557 Added support to use multiple directories in ZLIBINCDIR variable, 5558 Fixed CMAKE_C_FLAGS with multiple values when genout is compiled on MSVC, 5559 Fixed pnglibconf.c compilation on OS X including the sysroot path. 5560 5561Version 1.6.22rc01 [May 14, 2016] 5562 No changes. 5563 5564Version 1.6.22rc02 [May 16, 2016] 5565 Removed contrib/timepng from default build; it does not build on platforms 5566 that don't supply clock_gettime(). 5567 5568Version 1.6.22rc03 [May 17, 2016] 5569 Restored contrib/timepng to default build but check for the presence 5570 of clock_gettime() in configure.ac and Makefile.am. 5571 5572Version 1.6.22 [May 26, 2016] 5573 No changes. 5574 5575Version 1.6.23beta01 [May 29, 2016] 5576 Stop a potential memory leak in png_set_tRNS() (Bug report by Ted Ying). 5577 Fixed the progressive reader to handle empty first IDAT chunk properly 5578 (patch by Timothy Nikkel). This bug was introduced in libpng-1.6.0 and 5579 only affected the libpng16 branch. 5580 Added tests in pngvalid.c to check zero-length IDAT chunks in various 5581 positions. Fixed the sequential reader to handle these more robustly 5582 (John Bowler). 5583 5584Version 1.6.23rc01 [June 2, 2016] 5585 Corrected progressive read input buffer in pngvalid.c. The previous version 5586 the code invariably passed just one byte at a time to libpng. The intent 5587 was to pass a random number of bytes in the range 0..511. 5588 Moved sse2 prototype from pngpriv.h to contrib/intel/intel_sse.patch. 5589 Added missing ")" in pngerror.c (Matt Sarrett). 5590 5591Version 1.6.23rc02 [June 4, 2016] 5592 Fixed undefined behavior in png_push_save_buffer(). Do not call 5593 memcpy() with a null source, even if count is zero (Leon Scroggins III). 5594 5595Version 1.6.23 [June 9, 2016] 5596 Fixed bad link to RFC2083 in png.5 (Nikola Forro). 5597 5598Version 1.6.24beta01 [June 11, 2016] 5599 Avoid potential overflow of the PNG_IMAGE_SIZE macro. This macro 5600 is not used within libpng, but is used in some of the examples. 5601 5602Version 1.6.24beta02 [June 23, 2016] 5603 Correct filter heuristic overflow handling. This was broken when the 5604 write filter code was moved out-of-line; if there is a single filter and 5605 the heuristic sum overflows the calculation of the filtered line is not 5606 completed. In versions prior to 1.6 the code was duplicated in-line 5607 and the check not performed, so the filter operation completed; however, 5608 in the multi-filter case where the sum is performed the 'none' filter would 5609 be selected if all the sums overflowed, even if it wasn't in the filter 5610 list. The fix to the first problem is simply to provide PNG_SIZE_MAX as 5611 the current lmins sum value; this means the sum can never exceed it and 5612 overflows silently. A reasonable compiler that does choose to inline 5613 the code will simply eliminate the sum check. 5614 The fix to the second problem is to use high precision arithmetic (this is 5615 implemented in 1.7), however a simple safe fix here is to chose the lowest 5616 numbered filter in the list from png_set_filter (this only works if the 5617 first problem is also fixed) (John Bowler). 5618 Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois). 5619 Fixed the case where PNG_IMAGE_BUFFER_SIZE can overflow in the application 5620 as a result of the application using an increased 'row_stride'; previously 5621 png_image_finish_read only checked for overflow on the base calculation of 5622 components. (I.e. it checked for overflow of a 32-bit number on the total 5623 number of pixel components in the output format, not the possibly padded row 5624 length and not the number of bytes, which for linear formats is twice the 5625 number of components.) 5626 MSVC does not like '-(unsigned)', so replaced it with 0U-(unsigned) 5627 MSVC does not like (uInt) = -(unsigned) (i.e. as an initializer), unless 5628 the conversion is explicitly invoked by a cast. 5629 Put the SKIP definition in the correct place. It needs to come after the 5630 png.h include (see all the other .c files in contrib/libtests) because it 5631 depends on PNG_LIBPNG_VER. 5632 Removed the three compile warning options from the individual project 5633 files into the zlib.props globals. It increases the warning level from 4 5634 to All and adds a list of the warnings that need to be turned off. This is 5635 semi-documentary; the intent is to tell libpng users which warnings have 5636 been examined and judged non-fixable at present. The warning about 5637 structure padding is fixable, but it would be a significant change (moving 5638 structure members around). 5639 5640Version 1.6.24beta03 [July 4, 2016] 5641 Optimized absolute value calculation in filter selection, similar to 5642 code in the PAETH decoder in pngrutil.c. Build with PNG_USE_ABS to 5643 use this. 5644 Added pngcp to the build together with a pngcp.dfa configuration test. 5645 Added high resolution timing to pngcp. 5646 Added "Common linking failures" section to INSTALL. 5647 Relocated misplaced #endif in png.c sRGB profile checking. 5648 Fixed two Coverity issues in pngcp.c. 5649 5650Version 1.6.24beta04 [July 8, 2016] 5651 Avoid filter-selection heuristic sum calculations in cases where only one 5652 filter is a candidate for selection. This trades off code size (added 5653 private png_setup_*_row_only() functions) for speed. 5654 5655Version 1.6.24beta05 [July 13, 2016] 5656 Fixed some indentation to comply with our coding style. 5657 Added contrib/tools/reindent. 5658 5659Version 1.6.24beta06 [July 18, 2016] 5660 Fixed more indentation to comply with our coding style. 5661 Eliminated unnecessary tests of boolean png_isaligned() vs 0. 5662 5663Version 1.6.24rc01 [July 25, 2016] 5664 No changes. 5665 5666Version 1.6.24rc02 [August 1, 2016] 5667 Conditionally compile SSE2 headers in contrib/intel/intel_sse.patch 5668 Conditionally compile png_decompress_chunk(). 5669 5670Version 1.6.24rc03 [August 2, 2016] 5671 Conditionally compile ARM_NEON headers in pngpriv.h 5672 Updated contrib/intel/intel_sse.patch 5673 5674Version 1.6.24[August 4, 2016] 5675 No changes. 5676 5677Version 1.6.25beta01 [August 12, 2016] 5678 Reject oversized iCCP profile immediately. 5679 Cleaned up PNG_DEBUG compile of pngtest.c. 5680 Conditionally compile png_inflate(). 5681 5682Version 1.6.25beta02 [August 18, 2016] 5683 Don't install pngcp; it conflicts with pngcp in the pngtools package. 5684 Minor editing of INSTALL, (whitespace, added copyright line) 5685 5686Version 1.6.25rc01 [August 24, 2016] 5687 No changes. 5688 5689Version 1.6.25rc02 [August 29, 2016] 5690 Added MIPS support (Mandar Sahastrabuddhe <Mandar.Sahastrabuddhe@imgtec.com>). 5691 Only the UP filter is currently implemented. 5692 5693Version 1.6.25rc03 [August 29, 2016] 5694 Rebased contrib/intel/intel_sse.patch after the MIPS implementation. 5695 5696Version 1.6.25rc04 [August 30, 2016] 5697 Added MIPS support for SUB, AVG, and PAETH filters (Mandar Sahastrabuddhe). 5698 5699Version 1.6.25rc05 [August 30, 2016] 5700 Rebased contrib/intel/intel_sse.patch after the MIPS implementation update.. 5701 5702Version 1.6.25 [September 1, 2016] 5703 No changes. 5704 5705Version 1.6.26beta01 [September 26, 2016] 5706 Fixed handling zero length IDAT in pngfix (bug report by Agostino Sarubbo, 5707 bugfix by John Bowler). 5708 Do not issue a png_error() on read in png_set_pCAL() because png_handle_pCAL 5709 has allocated memory that libpng needs to free. 5710 Conditionally compile png_set_benign_errors() in pngread.c and pngtest.c 5711 Issue a png_benign_error instead of a png_error on ADLER32 mismatch 5712 while decoding compressed data chunks. 5713 Changed PNG_ZLIB_VERNUM to ZLIB_VERNUM in pngpriv.h, pngstruct.h, and 5714 pngrutil.c. 5715 If CRC handling of critical chunks has been set to PNG_CRC_QUIET_USE, 5716 ignore the ADLER32 checksum in the IDAT chunk as well as the chunk CRCs. 5717 Issue png_benign_error() on ADLER32 checksum mismatch instead of png_error(). 5718 Add tests/badcrc.png and tests/badadler.png to tests/pngtest. 5719 Merged pngtest.c with libpng-1.7.0beta84/pngtest.c 5720 5721Version 1.6.26beta02 [October 1, 2016] 5722 Updated the documentation about CRC and ADLER32 handling. 5723 Quieted 117 warnings from clang-3.8 in pngtrans.c, pngread.c, 5724 pngwrite.c, pngunknown.c, and pngvalid.c. 5725 Quieted 58 (out of 144) -Wconversion compiler warnings by changing 5726 flag definitions in pngpriv.h from 0xnnnn to 0xnnnnU and trivial changes 5727 in png.c, pngread.c, and pngwutil.c. 5728 5729Version 1.6.26beta03 [October 2, 2016] 5730 Removed contrib/libtests/*.orig and *.rej that slipped into the tarballs. 5731 Quieted the 86 remaining -Wconversion compiler warnings by 5732 revising the png_isaligned() macro and trivial changes in png.c, 5733 pngerror.c, pngget.c, pngmem.c, pngset.c, pngrtran.c, pngrutil.c, 5734 pngwtran.c, pngwrite.c, and pngwutil.c. 5735 5736Version 1.6.26beta04 [October 3, 2016] 5737 Quieted (bogus?) clang warnings about "absolute value has no effect" 5738 when PNG_USE_ABS is defined. 5739 Fixed offsets in contrib/intel/intel_sse.patch 5740 5741Version 1.6.26beta05 [October 6, 2016] 5742 Changed integer constant 4294967294 to unsigned 4294967294U in pngconf.h 5743 to avoid a signed/unsigned compare in the preprocessor. 5744 5745Version 1.6.26beta06 [October 7, 2016] 5746 Use zlib-1.2.8.1 inflateValidate() instead of inflateReset2() to 5747 optionally avoid ADLER32 evaluation. 5748 5749Version 1.6.26rc01 [October 12, 2016] 5750 No changes. 5751 5752Version 1.6.26 [October 20, 2016] 5753 Cosmetic change, "ptr != 0" to "ptr != NULL" in png.c and pngrutil.c 5754 Despammed email addresses (replaced "@" with " at "). 5755 5756Version 1.6.27beta01 [November 2, 2016] 5757 Restrict the new ADLER32-skipping to IDAT chunks. It broke iCCP chunk 5758 handling: an erroneous iCCP chunk would throw a png_error and reject the 5759 entire PNG image instead of rejecting just the iCCP chunk with a warning, 5760 if built with zlib-1.2.8.1. 5761 5762Version 1.6.27rc01 [December 27, 2016] 5763 Control ADLER32 checking with new PNG_IGNORE_ADLER32 option. Fixes 5764 an endless loop when handling erroneous ADLER32 checksums; bug 5765 introduced in libpng-1.6.26. 5766 Removed the use of a macro containing the pre-processor 'defined' 5767 operator. It is unclear whether this is valid; a macro that 5768 "generates" 'defined' is not permitted, but the use of the word 5769 "generates" within the C90 standard seems to imply more than simple 5770 substitution of an expression itself containing a well-formed defined 5771 operation. 5772 Added ARM support to CMakeLists.txt (Andreas Franek). 5773 5774Version 1.6.27 [December 29, 2016] 5775 Fixed a potential null pointer dereference in png_set_text_2() (bug report 5776 and patch by Patrick Keshishian, CVE-2016-10087). 5777 5778Version 1.6.28rc01 [January 3, 2017] 5779 Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna). 5780 Added option to Cmake build allowing a custom location of zlib to be 5781 specified in a scenario where libpng is being built as a subproject 5782 alongside zlib by another project (Sam Serrels). 5783 Changed png_ptr->options from a png_byte to png_uint_32, to accommodate 5784 up to 16 options. 5785 5786Version 1.6.28rc02 [January 4, 2017] 5787 Added "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna). 5788 Moved SSE2 optimization code into the main libpng source directory. 5789 Configure libpng with "configure --enable-intel-sse" or compile 5790 libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it. 5791 5792Version 1.6.28rc03 [January 4, 2017] 5793 Backed out the SSE optimization and last CMakeLists.txt to allow time for QA. 5794 5795Version 1.6.28 [January 5, 2017] 5796 No changes. 5797 5798Version 1.6.29beta01 [January 12, 2017] 5799 Readded "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna). 5800 Moved SSE2 optimization code into the main libpng source directory. 5801 Configure libpng with "configure --enable-intel-sse" or compile 5802 libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it. 5803 Simplified conditional compilation in pngvalid.c, for AIX (Michael Felt). 5804 5805Version 1.6.29beta02 [February 22, 2017] 5806 Avoid conditional directives that break statements in pngrutil.c (Romero 5807 Malaquias) 5808 The contrib/examples/pngtopng.c recovery code was in the wrong "if" 5809 branches; the comments were correct. 5810 Added code for PowerPC VSX optimisation (Vadim Barkov). 5811 5812Version 1.6.29beta03 [March 1, 2017] 5813 Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer). 5814 Change test ZLIB_VERNUM >= 0x1281 to ZLIB_VERNUM >= 0x1290 in pngrutil.c 5815 because Solaris 11 distributes zlib-1.2.8.f that is older than 1.2.8.1, 5816 as suggested in zlib FAQ, item 24. 5817 Suppress clang warnings about implicit sign changes in png.c 5818 5819Version 1.6.29 [March 16, 2017] 5820 No changes. 5821 5822Version 1.6.30beta01 [April 1, 2017] 5823 Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in 5824 makefile.linux and makefile.solaris-x86 (Cosmin). 5825 Revised documentation of png_get_error_ptr() in the libpng manual. 5826 Silence clang -Wcomma and const drop warnings (Viktor Szakats). 5827 Update Sourceforge URLs in documentation (https instead of http). 5828 5829Version 1.6.30beta02 [April 22, 2017] 5830 Document need to check for integer overflow when allocating a pixel 5831 buffer for multiple rows in contrib/gregbook, contrib/pngminus, 5832 example.c, and in the manual (suggested by Jaeseung Choi). This 5833 is similar to the bug reported against pngquant in CVE-2016-5735. 5834 Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation. 5835 5836Version 1.6.30beta03 [May 22, 2017] 5837 Check for integer overflow in contrib/visupng and contrib/tools/genpng. 5838 Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt. 5839 Test CMAKE_HOST_WIN32 instead of WIN32 in CMakeLists.txt. 5840 Fix some URL in documentation. 5841 5842Version 1.6.30beta04 [June 7, 2017] 5843 Avoid writing an empty IDAT when the last IDAT exactly fills the 5844 compression buffer (bug report by Brian Baird). This bug was 5845 introduced in libpng-1.6.0. 5846 5847Version 1.6.30rc01 [June 14, 2017] 5848 No changes. 5849 5850Version 1.6.30rc02 [June 25, 2017] 5851 Update copyright year in pnglibconf.h, make ltmain.sh executable. 5852 Add a reference to the libpng.download site in README. 5853 5854Version 1.6.30 [June 28, 2017] 5855 No changes. 5856 5857Version 1.6.31beta01 [July 5, 2017] 5858 Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it; 5859 bug report by Michael Felt). 5860 Revised pngpriv.h to work around failure to compile arm/filter_neon.S 5861 ("typedef" directive is unrecognized by the assembler). The problem 5862 was introduced in libpng-1.6.30beta01. 5863 Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx). 5864 Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish). 5865 5866Version 1.6.31beta02 [July 8, 2017] 5867 Added instructions for disabling hardware optimizations in INSTALL. 5868 Added "--enable-hardware-optimizations" configuration flag to enable 5869 or disable all hardware optimizations with one flag. 5870 5871Version 1.6.31beta03 [July 9, 2017] 5872 Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms. 5873 Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent 5874 possible integer overflow (Bug report by John Bowler). 5875 Quieted "declaration after statement" warnings in intel/filter_sse2.c. 5876 Added scripts/makefile-linux-opt, which has hardware optimizations enabled. 5877 5878Version 1.6.31beta04 [July 11, 2017] 5879 Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when 5880 integers appear on both sides of a compare. Worked around the others by 5881 forcing the strict-overflow setting in the relevant functions to a level 5882 where they are not reported (John Bowler). 5883 Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like 5884 the space. 5885 Worked around some C-style casts from (void*) because g++ 5.4.0 objects 5886 to them. 5887 Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint 5888 overflow' check that is on by default with -Wall -Wextra. 5889 5890Version 1.6.31beta05 [July 13, 2017] 5891 Added eXIf chunk support. 5892 5893Version 1.6.31beta06 [July 17, 2017] 5894 Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm 5895 tags) to pngtest.png. 5896 5897Version 1.6.31beta07 [July 18, 2017] 5898 Revised the eXIf chunk in pngtest.png to fix "Bad IFD1 Directory" warning. 5899 5900Version 1.6.31rc01 [July 19, 2017] 5901 No changes. 5902 5903Version 1.6.31rc02 [July 25, 2017] 5904 Fixed typo in example.c (png_free_image should be png_image_free) (Bug 5905 report by John Smith) 5906 5907Version 1.6.31 [July 27, 2017] 5908 No changes. 5909 5910Version 1.6.32beta01 [July 31, 2017] 5911 Avoid possible NULL dereference in png_handle_eXIf when benign_errors 5912 are allowed. Avoid leaking the input buffer "eXIf_buf". 5913 Eliminated png_ptr->num_exif member from pngstruct.h and added num_exif 5914 to arguments for png_get_eXIf() and png_set_eXIf(). 5915 Added calls to png_handle_eXIf(() in pngread.c and png_write_eXIf() in 5916 pngwrite.c, and made various other fixes to png_write_eXIf(). 5917 Changed name of png_get_eXIF and png_set_eXIf() to png_get_eXIf_1() and 5918 png_set_eXIf_1(), respectively, to avoid breaking API compatibility 5919 with libpng-1.6.31. 5920 5921Version 1.6.32beta02 [August 1, 2017] 5922 Updated contrib/libtests/pngunknown.c with eXIf chunk. 5923 5924Version 1.6.32beta03 [August 2, 2017] 5925 Initialized btoa[] in pngstest.c 5926 Stop memory leak when returning from png_handle_eXIf() with an error 5927 (Bug report from the OSS-fuzz project). 5928 5929Version 1.6.32beta04 [August 2, 2017] 5930 Replaced local eXIf_buf with info_ptr-eXIf_buf in png_handle_eXIf(). 5931 Update libpng.3 and libpng-manual.txt about eXIf functions. 5932 5933Version 1.6.32beta05 [August 2, 2017] 5934 Restored png_get_eXIf() and png_set_eXIf() to maintain API compatibility. 5935 5936Version 1.6.32beta06 [August 2, 2017] 5937 Removed png_get_eXIf_1() and png_set_eXIf_1(). 5938 5939Version 1.6.32beta07 [August 3, 2017] 5940 Check length of all chunks except IDAT against user limit to fix an 5941 OSS-fuzz issue (Fixes CVE-2017-12652). 5942 5943Version 1.6.32beta08 [August 3, 2017] 5944 Check length of IDAT against maximum possible IDAT size, accounting 5945 for height, rowbytes, interlacing and zlib/deflate overhead. 5946 Restored png_get_eXIf_1() and png_set_eXIf_1(), because strlen(eXIf_buf) 5947 does not work (the eXIf chunk data can contain zeroes). 5948 5949Version 1.6.32beta09 [August 3, 2017] 5950 Require cmake-2.8.8 in CMakeLists.txt. Revised symlink creation, 5951 no longer using deprecated cmake LOCATION feature (Clifford Yapp). 5952 Fixed five-byte error in the calculation of IDAT maximum possible size. 5953 5954Version 1.6.32beta10 [August 5, 2017] 5955 Moved chunk-length check into a png_check_chunk_length() private 5956 function (Suggested by Max Stepin). 5957 Moved bad pngs from tests to contrib/libtests/crashers 5958 Moved testing of bad pngs into a separate tests/pngtest-badpngs script 5959 Added the --xfail (expected FAIL) option to pngtest.c. It writes XFAIL 5960 in the output but PASS for the libpng test. 5961 Require cmake-3.0.2 in CMakeLists.txt (Clifford Yapp). 5962 Fix "const" declaration info_ptr argument to png_get_eXIf_1() and the 5963 num_exif argument to png_get_eXIf_1() (Github Issue 171). 5964 5965Version 1.6.32beta11 [August 7, 2017] 5966 Added "eXIf" to "chunks_to_ignore[]" in png_set_keep_unknown_chunks(). 5967 Added huge_IDAT.png and empty_ancillary_chunks.png to testpngs/crashers. 5968 Make pngtest --strict, --relax, --xfail options imply -m (multiple). 5969 Removed unused chunk_name parameter from png_check_chunk_length(). 5970 Relocated setting free_me for eXIf data, to stop an OSS-fuzz leak. 5971 Initialize profile_header[] in png_handle_iCCP() to fix OSS-fuzz issue. 5972 Initialize png_ptr->row_buf[0] to 255 in png_read_row() to fix OSS-fuzz UMR. 5973 Attempt to fix a UMR in png_set_text_2() to fix OSS-fuzz issue. 5974 Increase minimum zlib stream from 9 to 14 in png_handle_iCCP(), to account 5975 for the minimum 'deflate' stream, and relocate the test to a point 5976 after the keyword has been read. 5977 Check that the eXIf chunk has at least 2 bytes and begins with "II" or "MM". 5978 5979Version 1.6.32rc01 [August 18, 2017] 5980 Added a set of "huge_xxxx_chunk.png" files to contrib/testpngs/crashers, 5981 one for each known chunk type, with length = 2GB-1. 5982 Check for 0 return from png_get_rowbytes() and added some (size_t) typecasts 5983 in contrib/pngminus/*.c to stop some Coverity issues (162705, 162706, 5984 and 162707). 5985 Renamed chunks in contrib/testpngs/crashers to avoid having files whose 5986 names differ only in case; this causes problems with some platforms 5987 (github issue #172). 5988 5989Version 1.6.32rc02 [August 22, 2017] 5990 Added contrib/oss-fuzz directory which contains files used by the oss-fuzz 5991 project (https://github.com/google/oss-fuzz/tree/master/projects/libpng). 5992 5993Version 1.6.32 [August 24, 2017] 5994 No changes. 5995 5996Version 1.6.33beta01 [August 28, 2017] 5997 Added PNGMINUS_UNUSED macro to contrib/pngminus/p*.c and added missing 5998 parenthesis in contrib/pngminus/pnm2png.c (bug report by Christian Hesse). 5999 Fixed off-by-one error in png_do_check_palette_indexes() (Bug report 6000 by Mick P., Source Forge Issue #269). 6001 6002Version 1.6.33beta02 [September 3, 2017] 6003 Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc 6004 to fix shortlived oss-fuzz issue 3234. 6005 Compute a larger limit on IDAT because some applications write a deflate 6006 buffer for each row (Bug report by Andrew Church). 6007 Use current date (DATE) instead of release-date (RDATE) in last 6008 changed date of contrib/oss-fuzz files. 6009 Enabled ARM support in CMakeLists.txt (Bernd Kuhls). 6010 6011Version 1.6.33beta03 [September 14, 2017] 6012 Fixed incorrect typecast of some arguments to png_malloc() and 6013 png_calloc() that were png_uint_32 instead of png_alloc_size_t 6014 (Bug report by "irwir" in Github libpng issue #175). 6015 Use pnglibconf.h.prebuilt when building for ANDROID with cmake (Github 6016 issue 162, by rcdailey). 6017 6018Version 1.6.33rc01 [September 20, 2017] 6019 Initialize memory allocated by png_inflate to zero, using memset, to 6020 stop an oss-fuzz "use of uninitialized value" detection in png_set_text_2() 6021 due to truncated iTXt or zTXt chunk. 6022 Initialize memory allocated by png_read_buffer to zero, using memset, to 6023 stop an oss-fuzz "use of uninitialized value" detection in 6024 png_icc_check_tag_table() due to truncated iCCP chunk. 6025 Removed a redundant test (suggested by "irwir" in Github issue #180). 6026 6027Version 1.6.33rc02 [September 23, 2017] 6028 Added an interlaced version of each file in contrib/pngsuite. 6029 Relocate new memset() call in pngrutil.c. 6030 Removed more redundant tests (suggested by "irwir" in Github issue #180). 6031 Add support for loading images with associated alpha in the Simplified 6032 API (Samuel Williams). 6033 6034Version 1.6.33 [September 28, 2017] 6035 Revert contrib/oss-fuzz/libpng_read_fuzzer.cc to libpng-1.6.32 state. 6036 Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc 6037 Add end_info structure and png_read_end() to the libpng fuzzer. 6038 6039Version 1.6.34 [September 29, 2017] 6040 Removed contrib/pngsuite/i*.png; some of them caused test failures. 6041 6042Version 1.6.35beta01 [March 6, 2018] 6043 Restored 21 of the contrib/pngsuite/i*.png, which do not cause test 6044 failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png. 6045 Added calls to png_set_*() transforms commonly used by browsers to 6046 the fuzzer. 6047 Removed some unnecessary brackets in pngrtran.c 6048 Fixed miscellaneous typos (Patch by github user "luzpaz"). 6049 Change "ASM C" to "C ASM" in CMakeLists.txt 6050 Fixed incorrect handling of bKGD chunk in sub-8-bit files (Cosmin) 6051 Added hardware optimization directories to zip and 7z distributions. 6052 Fixed incorrect bitmask for options. 6053 Fixed many spelling typos. 6054 6055Version 1.6.35beta02 [March 28, 2018] 6056 Make png_get_iCCP consistent with man page (allow compression-type argument 6057 to be NULL, bug report by Lenard Szolnoki). 6058 6059Version 1.6.35 [July 15, 2018] 6060 Replaced the remaining uses of png_size_t with size_t (Cosmin) 6061 Fixed the calculation of row_factor in png_check_chunk_length 6062 (reported by Thuan Pham in SourceForge issue #278) 6063 Added missing parentheses to a macro definition 6064 (suggested by "irwir" in GitHub issue #216) 6065 6066Version 1.6.36 [December 1, 2018] 6067 Optimized png_do_expand_palette for ARM processors. 6068 Improved performance by around 10-22% on a recent ARM Chromebook. 6069 (Contributed by Richard Townsend, ARM Holdings) 6070 Fixed manipulation of machine-specific optimization options. 6071 (Contributed by Vicki Pfau) 6072 Used memcpy instead of manual pointer arithmetic on Intel SSE2. 6073 (Contributed by Samuel Williams) 6074 Fixed build errors with MSVC on ARM64. 6075 (Contributed by Zhijie Liang) 6076 Fixed detection of libm in CMakeLists. 6077 (Contributed by Cameron Cawley) 6078 Fixed incorrect creation of pkg-config file in CMakeLists. 6079 (Contributed by Kyle Bentley) 6080 Fixed the CMake build on Windows MSYS by avoiding symlinks. 6081 Fixed a build warning on OpenBSD. 6082 (Contributed by Theo Buehler) 6083 Fixed various typos in comments. 6084 (Contributed by "luz.paz") 6085 Raised the minimum required CMake version from 3.0.2 to 3.1. 6086 Removed yet more of the vestigial support for pre-ANSI C compilers. 6087 Removed ancient makefiles for ancient systems that have been broken 6088 across all previous libpng-1.6.x versions. 6089 Removed the Y2K compliance statement and the export control 6090 information. 6091 Applied various code style and documentation fixes. 6092 6093Version 1.6.37 [April 14, 2019] 6094 Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free. 6095 Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette. 6096 Fixed a memory leak in pngtest.c. 6097 Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in 6098 contrib/pngminus; refactor. 6099 Changed the license of contrib/pngminus to MIT; refresh makefile and docs. 6100 (Contributed by Willem van Schaik) 6101 Fixed a typo in the libpng license v2. 6102 (Contributed by Miguel Ojeda) 6103 Added makefiles for AddressSanitizer-enabled builds. 6104 Cleaned up various makefiles. 6105 6106Version 1.6.38 [September 14, 2022] 6107 Added configurations and scripts for continuous integration. 6108 Fixed various errors in the handling of tRNS, hIST and eXIf. 6109 Implemented many stability improvements across all platforms. 6110 Updated the internal documentation. 6111 6112Version 1.6.39 [November 20, 2022] 6113 Changed the error handler of oversized chunks (i.e. larger than 6114 PNG_USER_CHUNK_MALLOC_MAX) from png_chunk_error to png_benign_error. 6115 Fixed a buffer overflow error in contrib/tools/pngfix. 6116 Fixed a memory leak (CVE-2019-6129) in contrib/tools/pngcp. 6117 Disabled the ARM Neon optimizations by default in the CMake file, 6118 following the default behavior of the configure script. 6119 Allowed configure.ac to work with the trunk version of autoconf. 6120 Removed the support for "install" targets from the legacy makefiles; 6121 removed the obsolete makefile.cegcc. 6122 Cleaned up the code and updated the internal documentation. 6123 6124Send comments/corrections/commendations to png-mng-implement at lists.sf.net. 6125Subscription is required; visit 6126https://lists.sourceforge.net/lists/listinfo/png-mng-implement 6127to subscribe. 6128
