3 CHANGES - changes for libpng
6 added reader into png.h
7 fixed small problems in stub file
11 split up pngwrite.c to several files
14 cleaned up writer, adding a few new transformations
15 fixed some bugs in writer
16 interfaced with zlib 0.5
18 added check for 64 KB blocks for 16 bit machines
21 cleaned up code and commented code
22 simplified time handling into png_time
23 created png_color_16 and png_color_8 to handle color needs
24 cleaned up color type defines
26 made various names more consistent
27 interfaced with zlib 0.71
28 cleaned up zTXt reader and writer (using zlib's Reset functions)
29 split transformations into pngrtran.c and pngwtran.c
32 interfaced with zlib 0.8
33 fixed many reading and writing bugs
34 saved using 3 spaces instead of tabs
37 added png_large_malloc() and png_large_free()
39 cleaned up some compiler warnings
40 added png_start_read_image()
43 cleaned up lots of bugs
44 finished dithering and other stuff
46 changed name from pnglib to libpng
48 Version 0.71 [June, 1995]
49 changed pngtest.png for zlib 0.93
50 fixed error in libpng.txt and example.c
54 added png_set_filler()
55 split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
56 added #define's to remove unwanted code
57 moved png_info_init() to png.c
58 added old_size into png_realloc()
59 added functions to manually set filtering and compression info
60 changed compression parameters based on image type
61 optimized filter selection code
63 changed external functions passing floats to doubles (k&r problems?)
64 put all the configurable stuff in pngconf.h
65 enabled png_set_shift to work with paletted images on read
66 added png_read_update_info() - updates info structure with transformations
68 Version 0.81 [August, 1995]
69 incorporated Tim Wegner's medium model code (thanks, Tim)
71 Version 0.82 [September, 1995]
74 Version 0.85 [December, 1995]
75 added more medium model code (almost everything's a far)
76 added i/o, error, and memory callback functions
77 fixed some bugs (16 bit, 4 bit interlaced, etc.)
78 added first run progressive reader (barely tested)
80 Version 0.86 [January, 1996]
82 improved documentation
84 Version 0.87 [January, 1996]
85 fixed medium model bugs
86 fixed other bugs introduced in 0.85 and 0.86
87 added some minor documentation
89 Version 0.88 [January, 1996]
90 fixed progressive bugs
91 replaced tabs with spaces
92 cleaned up documentation
93 added callbacks for read/write and warning/error functions
95 Version 0.89 [July, 1996]
96 Added new initialization API to make libpng work better with shared libs
97 we now have png_create_read_struct(), png_create_write_struct(),
98 png_create_info_struct(), png_destroy_read_struct(), and
99 png_destroy_write_struct() instead of the separate calls to
100 malloc and png_read_init(), png_info_init(), and png_write_init()
101 Changed warning/error callback functions to fix bug - this means you
102 should use the new initialization API if you were using the old
103 png_set_message_fn() calls, and that the old API no longer exists
104 so that people are aware that they need to change their code
105 Changed filter selection API to allow selection of multiple filters
106 since it didn't work in previous versions of libpng anyways
107 Optimized filter selection code
108 Fixed png_set_background() to allow using an arbitrary RGB color for
110 Fixed gamma and background correction for paletted images, so
111 png_correct_palette is not needed unless you are correcting an
112 external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
113 in pngconf.h) - if nobody uses this, it may disappear in the future.
114 Fixed bug with Borland 64K memory allocation (Alexander Lehmann)
115 Fixed bug in interlace handling (Smarasderagd, I think)
116 Added more error checking for writing and image to reduce invalid files
117 Separated read and write functions so that they won't both be linked
118 into a binary when only reading or writing functionality is used
119 New pngtest image also has interlacing and zTXt
120 Updated documentation to reflect new API
122 Version 0.90 [January, 1997]
123 Made CRC errors/warnings on critical and ancillary chunks configurable
124 libpng will use the zlib CRC routines by (compile-time) default
125 Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
126 Added external C++ wrapper statements to png.h (Gilles Dauphin)
127 Allow PNG file to be read when some or all of file signature has already
128 been read from the beginning of the stream. ****This affects the size
129 of info_struct and invalidates all programs that use a shared libpng****
130 Fixed png_filler() declarations
131 Fixed? background color conversions
132 Fixed order of error function pointers to match documentation
133 Current chunk name is now available in png_struct to reduce the number
134 of nearly identical error messages (will simplify multi-lingual
135 support when available)
136 Try to get ready for unknown-chunk callback functions:
137 - previously read critical chunks are flagged, so the chunk handling
138 routines can determine if the chunk is in the right place
139 - all chunk handling routines have the same prototypes, so we will
140 be able to handle all chunks via a callback mechanism
141 Try to fix Linux "setjmp" buffer size problems
142 Removed png_large_malloc, png_large_free, and png_realloc functions.
144 Version 0.95 [March, 1997]
145 Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
146 Fixed bug in PNG file signature compares when start != 0
147 Changed parameter type of png_set_filler(...filler...) from png_byte
149 Added test for MACOS to ensure that both math.h and fp.h are not #included
150 Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
151 Added "packswap" transformation, which changes the endianness of
152 packed-pixel bytes (Kevin Bracey)
153 Added "strip_alpha" transformation, which removes the alpha channel of
154 input images without using it (not necessarily a good idea)
155 Added "swap_alpha" transformation, which puts the alpha channel in front
156 of the color bytes instead of after
157 Removed all implicit variable tests which assume NULL == 0 (I think)
158 Changed several variables to "png_size_t" to show 16/32-bit limitations
159 Added new pCAL chunk read/write support
160 Added experimental filter selection weighting (Greg Roelofs)
161 Removed old png_set_rgbx() and png_set_xrgb() functions that have been
162 obsolete for about 2 years now (use png_set_filler() instead)
163 Added macros to read 16- and 32-bit ints directly from buffer, to be
164 used only on those systems that support it (namely PowerPC and 680x0)
165 With some testing, this may become the default for MACOS/PPC systems.
166 Only calculate CRC on data if we are going to use it
167 Added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
168 Added macros for simple libpng debugging output selectable at compile time
169 Removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
170 More description of info_struct in libpng.txt and png.h
171 More instructions in example.c
172 More chunk types tested in pngtest.c
173 Renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
174 png_set_<chunk>. We now have corresponding png_get_<chunk>
175 functions in pngget.c to get information in info_ptr. This isolates
176 the application from the internal organization of png_info_struct
177 (good for shared library implementations).
179 Version 0.96 [May, 1997]
180 Fixed serious bug with < 8bpp images introduced in 0.95
181 Fixed 256-color transparency bug (Greg Roelofs)
182 Fixed up documentation (Greg Roelofs, Laszlo Nyul)
183 Fixed "error" in pngconf.h for Linux setjmp() behaviour
184 Fixed DOS medium model support (Tim Wegner)
185 Fixed png_check_keyword() for case with error in static string text
186 Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
187 Added typecasts to quiet compiler errors
188 Added more debugging info
190 Version 0.97 [January, 1998]
191 Removed PNG_USE_OWN_CRC capability
192 Relocated png_set_crc_action from pngrutil.c to pngrtran.c
193 Fixed typecasts of "new_key", etc. (Andreas Dilger)
194 Added RFC 1152 [sic] date support
195 Fixed bug in gamma handling of 4-bit grayscale
196 Added 2-bit grayscale gamma handling (Glenn R-P)
197 Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
198 Minor corrections in libpng.txt
199 Added simple sRGB support (Glenn R-P)
200 Easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
201 all configurable options can be selected from command-line instead
202 of having to edit pngconf.h (Glenn R-P)
203 Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
204 Added more conditions for png_do_background, to avoid changing
205 black pixels to background when a background is supplied and
206 no pixels are transparent
207 Repaired PNG_NO_STDIO behaviour
208 Tested NODIV support and made it default behaviour (Greg Roelofs)
209 Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
210 Regularized version numbering scheme and bumped shared-library major
211 version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs)
213 Version 0.98 [January, 1998]
214 Cleaned up some typos in libpng.txt and in code documentation
215 Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
216 Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
217 Changed recommendation about file_gamma for PC images to .51 from .45,
218 in example.c and libpng.txt, added comments to distinguish between
219 screen_gamma, viewing_gamma, and display_gamma.
220 Changed all references to RFC1152 to read RFC1123 and changed the
221 PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
222 Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
223 Changed srgb_intent from png_byte to int to avoid compiler bugs
225 Version 0.99 [January 30, 1998]
226 Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
227 Fixed a longstanding "packswap" bug in pngtrans.c
228 Fixed some inconsistencies in pngconf.h that prevented compiling with
229 PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
230 Fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
231 Changed recommendation about file_gamma for PC images to .50 from .51 in
232 example.c and libpng.txt, and changed file_gamma for sRGB images to .45
233 Added a number of functions to access information from the png structure
234 png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
235 Added TARGET_MACOS similar to zlib-1.0.8
236 Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
237 Added type casting to all png_malloc() function calls
239 Version 0.99a [January 31, 1998]
240 Added type casts and parentheses to all returns that return a value.(Tim W.)
242 Version 0.99b [February 4, 1998]
243 Added type cast png_uint_32 on malloc function calls where needed.
244 Changed type of num_hist from png_uint_32 to int (same as num_palette).
245 Added checks for rowbytes overflow, in case png_size_t is less than 32 bits.
246 Renamed makefile.elf to makefile.lnx.
248 Version 0.99c [February 7, 1998]
249 More type casting. Removed erroneous overflow test in pngmem.c.
250 Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.
251 Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5.
253 Version 0.99d [February 11, 1998]
254 Renamed "far_to_near()" "png_far_to_near()"
256 Version 99c "buffered" operations didn't work as intended. Replaced them
257 with png_memcpy_check() and png_memset_check().
258 Added many "if (png_ptr == NULL) return" to quell compiler warnings about
259 unused png_ptr, mostly in pngget.c and pngset.c.
260 Check for overlength tRNS chunk present when indexed-color PLTE is read.
261 Cleaned up spelling errors in libpng.3/libpng.txt
262 Corrected a problem with png_get_tRNS() which returned undefined trans array
264 Version 0.99e [February 28, 1998]
265 Corrected png_get_tRNS() again.
266 Add parentheses for easier reading of pngget.c, fixed "||" should be "&&".
267 Touched up example.c to make more of it compileable, although the entire
268 file still can't be compiled (Willem van Schaik)
269 Fixed a bug in png_do_shift() (Bryan Tsai)
270 Added a space in png.h prototype for png_write_chunk_start()
271 Replaced pngtest.png with one created with zlib 1.1.1
272 Changed pngtest to report PASS even when file size is different (Jean-loup G.)
273 Corrected some logic errors in png_do_invert_alpha() (Chris Patterson)
275 Version 0.99f [March 5, 1998]
276 Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey)
277 Moved makefiles into a "scripts" directory, and added INSTALL instruction file
278 Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok)
279 Added pointers to "note on libpng versions" in makefile.lnx and README
280 Added row callback feature when reading and writing nonprogressive rows
281 and added a test of this feature in pngtest.c
282 Added user transform callbacks, with test of the feature in pngtest.c
284 Version 0.99g [March 6, 1998, morning]
285 Minor changes to pngtest.c to suppress compiler warnings.
286 Removed "beta" language from documentation.
288 Version 0.99h [March 6, 1998, evening]
289 Minor changes to previous minor changes to pngtest.c
290 Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED
291 and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro
292 Added user transform capability
294 Version 1.00 [March 7, 1998]
295 Changed several typedefs in pngrutil.c
296 Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)
297 Replaced "while(1)" with "for(;;)"
298 Added PNGARG() to prototypes in pngtest.c and removed some prototypes
299 Updated some of the makefiles (Tom Lane)
300 Changed some typedefs (s_start, etc.) in pngrutil.c
301 Fixed dimensions of "short_months" array in pngwrite.c
302 Replaced ansi2knr.c with the one from jpeg-v6
304 Version 1.0.0 [March 8, 1998]
305 Changed name from 1.00 to 1.0.0 (Adam Costello)
306 Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)
308 Version 1.0.0a [March 9, 1998]
309 Fixed three bugs in pngrtran.c to make gamma+background handling consistent
311 Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz
312 for major, minor, and bugfix releases. This is 10001. (Adam Costello,
314 Make months range from 1-12 in png_convert_to_rfc1123
316 Version 1.0.0b [March 13, 1998]
317 Quieted compiler complaints about two empty "for" loops in pngrutil.c
318 Minor changes to makefile.s2x
319 Removed #ifdef/#endif around a png_free() in pngread.c
321 Version 1.0.1 [March 14, 1998]
322 Changed makefile.s2x to reduce security risk of using a relative pathname
323 Fixed some typos in the documentation (Greg).
324 Fixed a problem with value of "channels" returned by png_read_update_info()
326 Version 1.0.1a [April 21, 1998]
327 Optimized Paeth calculations by replacing abs() function calls with intrinsics
328 plus other loop optimizations. Improves avg decoding speed by about 20%.
329 Commented out i386istic "align" compiler flags in makefile.lnx.
330 Reduced the default warning level in some makefiles, to make them consistent.
331 Removed references to IJG and JPEG in the ansi2knr.c copyright statement.
332 Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.
333 Added grayscale and 16-bit capability to png_do_read_filler().
334 Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes
335 too large when writing an image with bit_depth < 8 (Bob Dellaca).
336 Corrected some bugs in the experimental weighted filtering heuristics.
337 Moved a misplaced pngrutil code block that truncates tRNS if it has more
338 than num_palette entries -- test was done before num_palette was defined.
339 Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
340 Changed compiler flags in makefile.wat for better optimization
343 Version 1.0.1b [May 2, 1998]
344 Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
345 Relocated the png_composite macros from pngrtran.c to png.h (Greg).
346 Added makefile.sco (contributed by Mike Hopkirk).
347 Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
348 Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
349 More work on the Paeth-filtering, achieving imperceptible speedup
351 More work on loop optimization which may help when compiled with C++
353 Added warnings when people try to use transforms they've defined out.
354 Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
355 Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
357 Version 1.0.1c [May 11, 1998]
358 Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
359 filler bytes should have been 0xff instead of 0xf.
360 Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
361 Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
362 out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
363 Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,
364 for consistency, in pngconf.h
365 Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier
366 to remove unwanted capabilities via the compile line
367 Made some corrections to grammar (which, it's) in documentation (Greg).
368 Corrected example.c, use of row_pointers in png_write_image().
370 Version 1.0.1d [May 24, 1998]
371 Corrected several statements that used side effects illegally in pngrutil.c
372 and pngtrans.c, that were introduced in version 1.0.1b
373 Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
374 More corrections to example.c, use of row_pointers in png_write_image()
376 Added pngdll.mak and pngdef.pas to scripts directory, contributed by
377 Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
378 Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
379 Changed several loops from count-down to count-up, for consistency.
381 Version 1.0.1e [June 6, 1998]
382 Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
383 added warnings when people try to set png_read_fn and png_write_fn in
385 Added a test such that png_do_gamma will be done when num_trans==0
386 for truecolor images that have defined a background. This corrects an
387 error that was introduced in libpng-0.90 that can cause gamma processing
389 Added tests in png.h to include "trans" and "trans_values" in structures
390 when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined.
391 Add png_free(png_ptr->time_buffer) in png_destroy_read_struct()
392 Moved png_convert_to_rfc_1123() from pngwrite.c to png.c
393 Added capability for user-provided malloc_fn() and free_fn() functions,
394 and revised pngtest.c to demonstrate their use, replacing the
395 PNGTEST_DEBUG_MEM feature.
396 Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
398 Version 1.0.2 [June 14, 1998]
399 Fixed two bugs in makefile.bor .
401 Version 1.0.2a [December 30, 1998]
402 Replaced and extended code that was removed from png_set_filler() in 1.0.1a.
403 Fixed a bug in png_do_filler() that made it fail to write filler bytes in
404 the left-most pixel of each row (Kevin Bracey).
405 Changed "static pngcharp tIME_string" to "static char tIME_string[30]"
406 in pngtest.c (Duncan Simpson).
407 Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk
408 even when no tIME chunk was present in the source file.
409 Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit.
410 Fixed a problem in png_read_push_finish_row(), which would not skip some
411 passes that it should skip, for images that are less than 3 pixels high.
412 Interchanged the order of calls to png_do_swap() and png_do_shift()
413 in pngwtran.c (John Cromer).
414 Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h .
415 Changed "bad adaptive filter type" from error to warning in pngrutil.c .
416 Fixed a documentation error about default filtering with 8-bit indexed-color.
417 Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO
419 Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.
420 Added png_get_copyright() and png_get_header_version() functions.
421 Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c
422 Added information about debugging in libpng.txt and libpng.3 .
423 Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and
425 Removed lines after Dynamic Dependencies" in makefile.aco .
426 Revised makefile.dec to make a shared library (Jeremie Petit).
427 Removed trailing blanks from all files.
429 Version 1.0.2a [January 6, 1999]
430 Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h
431 Added "if" tests to silence complaints about unused png_ptr in png.h and png.c
432 Changed "check_if_png" function in example.c to return true (nonzero) if PNG.
433 Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()
436 Version 1.0.3 [January 14, 1999]
437 Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)
438 Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.
440 Version 1.0.3a [August 12, 1999]
441 Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
442 if an attempt is made to read an interlaced image when it's not supported.
443 Added check if png_ptr->trans is defined before freeing it in pngread.c
444 Modified the Y2K statement to include versions back to version 0.71
445 Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c
446 Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)
447 Replaced leading blanks with tab characters in makefile.hux
448 Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.
449 Changed (float)red and (float)green to (double)red, (double)green
450 in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.
451 Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).
452 Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).
453 Updated documentation to refer to the PNG-1.2 specification.
454 Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c
455 in makefile.knr, INSTALL, and README (L. Peter Deutsch)
456 Fixed bugs in calculation of the length of rowbytes when adding alpha
457 channels to 16-bit images, in pngrtran.c (Chris Nokleberg)
458 Added function png_set_user_transform_info() to store user_transform_ptr,
459 user_depth, and user_channels into the png_struct, and a function
460 png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)
461 Added function png_set_empty_plte_permitted() to make libpng useable
463 Corrected the typedef for png_free_ptr in png.h (Jesse Jones).
464 Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
465 consistent with PNG-1.2, and allow variance of 500 before complaining.
466 Added assembler code contributed by Intel in file pngvcrd.c and modified
467 makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation,
469 Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
470 Added some aliases for png_set_expand() in pngrtran.c, namely
471 png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
472 (Greg Roelofs, in "PNG: The Definitive Guide").
473 Added makefile.beo for BEOS on X86, contributed by Sander Stok.
475 Version 1.0.3b [August 26, 1999]
476 Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
477 Changed leading blanks to tabs in all makefiles.
478 Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
479 Made alternate versions of png_set_expand() in pngrtran.c, namely
480 png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
481 (Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases.
482 Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
483 Revised calculation of num_blocks in pngmem.c to avoid a potentially
484 negative shift distance, whose results are undefined in the C language.
485 Added a check in pngset.c to prevent writing multiple tIME chunks.
486 Added a check in pngwrite.c to detect invalid small window_bits sizes.
488 Version 1.0.3d [September 4, 1999]
489 Fixed type casting of igamma in pngrutil.c
490 Added new png_expand functions to scripts/pngdef.pas and pngos2.def
491 Added a demo read_user_transform_fn that examines the row filters in pngtest.c
493 Version 1.0.4 [September 24, 1999]
494 Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
495 Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
496 Made several minor corrections to pngtest.c
497 Renamed the makefiles with longer but more user friendly extensions.
498 Copied the PNG copyright and license to a separate LICENSE file.
499 Revised documentation, png.h, and example.c to remove reference to
500 "viewing_gamma" which no longer appears in the PNG specification.
501 Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
502 Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
503 Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
504 assembler code) and makefile.vcwin32 (doesn't).
505 Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
506 Added a copy of pngnow.png to the distribution.
508 Version 1.0.4a [September 25, 1999]
509 Increase max_pixel_depth in pngrutil.c if a user transform needs it.
510 Changed several division operations to right-shifts in pngvcrd.c
512 Version 1.0.4b [September 30, 1999]
513 Added parentheses in line 3732 of pngvcrd.c
514 Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
516 Version 1.0.4c [October 1, 1999]
517 Added a "png_check_version" function in png.c and pngtest.c that will generate
518 a helpful compiler error if an old png.h is found in the search path.
519 Changed type of png_user_transform_depth|channels from int to png_byte.
521 Version 1.0.4d [October 6, 1999]
522 Changed 0.45 to 0.45455 in png_set_sRGB()
523 Removed unused PLTE entries from pngnow.png
524 Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.
526 Version 1.0.4e [October 10, 1999]
527 Fixed sign error in pngvcrd.c (Greg Roelofs)
528 Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)
530 Version 1.0.4f [October 15, 1999]
531 Surrounded example.c code with #if 0 .. #endif to prevent people from
532 inadvertently trying to compile it.
533 Changed png_get_header_version() from a function to a macro in png.h
534 Added type casting mostly in pngrtran.c and pngwtran.c
535 Removed some pointless "ptr = NULL" in pngmem.c
536 Added a "contrib" directory containing the source code from Greg's book.
538 Version 1.0.5 [October 15, 1999]
539 Minor editing of the INSTALL and README files.
541 Version 1.0.5a [October 23, 1999]
542 Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
543 Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
544 Further optimization and bugfix of pngvcrd.c
545 Revised pngset.c so that it does not allocate or free memory in the user's
546 text_ptr structure. Instead, it makes its own copy.
547 Created separate write_end_info_struct in pngtest.c for a more severe test.
548 Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
550 Version 1.0.5b [November 23, 1999]
551 Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and
552 PNG_FLAG_WROTE_tIME from flags to mode.
553 Added png_write_info_before_PLTE() function.
554 Fixed some typecasting in contrib/gregbook/*.c
555 Updated scripts/makevms.com and added makevms.com to contrib/gregbook
556 and contrib/pngminus (Martin Zinser)
558 Version 1.0.5c [November 26, 1999]
559 Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr.
560 Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
561 accommodate making DLL's: Moved usr_png_ver from global variable to function
562 png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and
563 eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays
564 into pngtypes.h. Eliminated use of global png_pass arrays. Declared the
565 png_CHNK and png_pass arrays to be "const". Made the global arrays
566 available to applications (although none are used in libpng itself) when
567 PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined.
568 Removed some extraneous "-I" from contrib/pngminus/makefile.std
569 Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.
570 Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3
572 Version 1.0.5d [November 29, 1999]
573 Add type cast (png_const_charp) two places in png.c
574 Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
575 Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
576 to applications a macro "PNG_USE_LOCAL_ARRAYS".
577 comment out (with #ifdef) all the new declarations when
578 PNG_USE_GLOBAL_ARRAYS is defined.
579 Added PNG_EXPORT_VAR macro to accommodate making DLL's.
581 Version 1.0.5e [November 30, 1999]
582 Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
583 structure; refactored the inflate/deflate support to make adding new chunks
584 with trailing compressed parts easier in the future, and added new functions
585 png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP,
586 png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond).
587 NOTE: Applications that write text chunks MUST define png_text->lang
588 before calling png_set_text(). It must be set to NULL if you want to
589 write tEXt or zTXt chunks. If you want your application to be able to
590 run with older versions of libpng, use
592 #ifdef PNG_iTXt_SUPPORTED
593 png_text[i].lang = NULL;
596 Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned
597 offsets (Eric S. Raymond).
598 Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into
599 PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED
600 macros, leaving the separate macros also available.
601 Removed comments on #endifs at the end of many short, non-nested #if-blocks.
603 Version 1.0.5f [December 6, 1999]
604 Changed makefile.solaris to issue a warning about potential problems when
605 the ucb "ld" is in the path ahead of the ccs "ld".
606 Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.
607 Added sCAL chunk support (Eric S. Raymond).
609 Version 1.0.5g [December 7, 1999]
610 Fixed "png_free_spallettes" typo in png.h
611 Added code to handle new chunks in pngpread.c
612 Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block
613 Added "translated_key" to png_text structure and png_write_iTXt().
614 Added code in pngwrite.c to work around a newly discovered zlib bug.
616 Version 1.0.5h [December 10, 1999]
617 NOTE: regarding the note for version 1.0.5e, the following must also
618 be included in your code:
619 png_text[i].translated_key = NULL;
620 Unknown chunk handling is now supported.
621 Option to eliminate all floating point support was added. Some new
622 fixed-point functions such as png_set_gAMA_fixed() were added.
623 Expanded tabs and removed trailing blanks in source files.
625 Version 1.0.5i [December 13, 1999]
626 Added some type casts to silence compiler warnings.
627 Renamed "png_free_spalette" to "png_free_spalettes" for consistency.
628 Removed leading blanks from a #define in pngvcrd.c
629 Added some parameters to the new png_set_keep_unknown_chunks() function.
630 Added a test for up->location != 0 in the first instance of writing
631 unknown chunks in pngwrite.c
632 Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to
634 Added png_free_hIST() function.
635 Various patches to fix bugs in the sCAL and integer cHRM processing,
636 and to add some convenience macros for use with sCAL.
638 Version 1.0.5j [December 21, 1999]
639 Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
640 around buggy compilers.
641 Added new type "png_fixed_point" for integers that hold float*100000 values
642 Restored backward compatibility of tEXt/zTXt chunk processing:
643 Restored the first four members of png_text to the same order as v.1.0.5d.
644 Added members "lang_key" and "itxt_length" to png_text struct. Set
645 text_length=0 when "text" contains iTXt data. Use the "compression"
646 member to distinguish among tEXt/zTXt/iTXt types. Added
647 PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.
648 The "Note" above, about backward incompatibility of libpng-1.0.5e, no
650 Fixed png_read|write_iTXt() to read|write parameters in the right order,
651 and to write the iTXt chunk after IDAT if it appears in the end_ptr.
652 Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
653 Reversed the order of trying to write floating-point and fixed-point gAMA.
655 Version 1.0.5k [December 27, 1999]
656 Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
657 Added png_handle_as_unknown() function (Glenn)
658 Added png_free_chunk_list() function and chunk_list and num_chunk_list members
660 Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.
661 Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings
662 about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)
663 Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
664 Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
665 Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
667 Version 1.0.5l [January 1, 2000]
668 Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
669 for setting a callback function to handle unknown chunks and for
670 retrieving the associated user pointer (Glenn).
672 Version 1.0.5m [January 7, 2000]
673 Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
675 Version 1.0.5n [January 9, 2000]
676 Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
677 own memory for info_ptr->palette. This makes it safe for the calling
678 application to free its copy of the palette any time after it calls
681 Version 1.0.5o [January 20, 2000]
682 Cosmetic changes only (removed some trailing blanks and TABs)
684 Version 1.0.5p [January 31, 2000]
685 Renamed pngdll.mak to makefile.bd32
686 Cosmetic changes in pngtest.c
688 Version 1.0.5q [February 5, 2000]
689 Relocated the makefile.solaris warning about PATH problems.
690 Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
691 Revised makefile.gcmmx
692 Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
694 Version 1.0.5r [February 7, 2000]
695 Removed superfluous prototype for png_get_itxt from png.h
696 Fixed a bug in pngrtran.c that improperly expanded the background color.
697 Return *num_text=0 from png_get_text() when appropriate, and fix documentation
698 of png_get_text() in libpng.txt/libpng.3.
700 Version 1.0.5s [February 18, 2000]
701 Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
702 new error handler that's planned for the next libpng release, and changed
703 example.c, pngtest.c, and contrib programs to use this macro.
704 Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
705 Fixed a bug in png_read_png() that caused it to fail to expand some images
706 that it should have expanded.
707 Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
709 Changed the allocation of palette, history, and trans arrays back to
710 the version 1.0.5 method (linking instead of copying) which restores
711 backward compatibility with version 1.0.5. Added some remarks about
712 that in example.c. Added "free_me" member to info_ptr and png_ptr
713 and added png_free_data() function.
714 Updated makefile.linux and makefile.gccmmx to make directories conditionally.
715 Made cosmetic changes to pngasmrd.h
716 Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
717 Modified png_read_png() to allocate info_ptr->row_pointers only if it
718 hasn't already been allocated.
720 Version 1.0.5t [March 4, 2000]
721 Changed png_jmp_env() migration aiding macro to png_jmpbuf().
722 Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c
723 Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when
724 PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b
725 Files in contrib/gregbook were revised to use png_jmpbuf() and to select
726 a 24-bit visual if one is available, and to allow abbreviated options.
727 Files in contrib/pngminus were revised to use the png_jmpbuf() macro.
728 Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s
730 Version 1.0.5u [March 5, 2000]
731 Simplified the code that detects old png.h in png.c and pngtest.c
732 Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)
733 Increased precision of rgb_to_gray calculations from 8 to 15 bits and
734 added png_set_rgb_to_gray_fixed() function.
735 Added makefile.bc32 (32-bit Borland C++, C mode)
737 Version 1.0.5v [March 11, 2000]
738 Added some parentheses to the png_jmpbuf macro definition.
739 Updated references to the zlib home page, which has moved to freesoftware.com.
740 Corrected bugs in documentation regarding png_read_row() and png_write_row().
741 Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt.
742 Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
743 revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
745 Version 1.0.6 [March 20, 2000]
746 Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c
747 Added makefile.sggcc (SGI IRIX with gcc)
749 Version 1.0.6d [April 7, 2000]
750 Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
751 Added data_length parameter to png_decompress_chunk() function
752 Revised documentation to remove reference to abandoned png_free_chnk functions
753 Fixed an error in png_rgb_to_gray_fixed()
754 Revised example.c, usage of png_destroy_write_struct().
755 Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
756 Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c
757 Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
759 Version 1.0.6e [April 9, 2000]
760 Added png_data_freer() function.
761 In the code that checks for over-length tRNS chunks, added check of
762 info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
763 Minor revisions of libpng.txt/libpng.3.
764 Check for existing data and free it if the free_me flag is set, in png_set_*()
766 Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED
768 Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c
769 and mentioned the purposes of the two macros in libpng.txt/libpng.3.
771 Version 1.0.6f [April 14, 2000]
772 Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.
773 Add checks in png_set_text() for NULL members of the input text structure.
774 Revised libpng.txt/libpng.3.
775 Removed superfluous prototype for png_set_iTXt from png.h
776 Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
777 Changed several png_errors about malformed ancillary chunks to png_warnings.
779 Version 1.0.6g [April 24, 2000]
780 Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
781 Relocated paragraph about png_set_background() in libpng.3/libpng.txt
782 and other revisions (Matthias Benckmann)
783 Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
784 png_ptr members to restore binary compatibility with libpng-1.0.5
785 (breaks compatibility with libpng-1.0.6).
787 Version 1.0.6h [April 24, 2000]
788 Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds
789 libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)
790 This is a temporary change for test purposes.
792 Version 1.0.6i [May 2, 2000]
793 Rearranged some members at the end of png_info and png_struct, to put
794 unknown_chunks_num and free_me within the original size of the png_structs
795 and free_me, png_read_user_fn, and png_free_fn within the original png_info,
796 because some old applications allocate the structs directly instead of
797 using png_create_*().
798 Added documentation of user memory functions in libpng.txt/libpng.3
799 Modified png_read_png so that it will use user_allocated row_pointers
800 if present, unless free_me directs that it be freed, and added description
801 of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.
802 Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version
803 1.00) members of png_struct and png_info, to regain binary compatibility
804 when you define this macro. Capabilities lost in this event
805 are user transforms (new in version 1.0.0),the user transform pointer
806 (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,
807 the high-level interface, and unknown chunks support (all new in 1.0.6).
808 This was necessary because of old applications that allocate the structs
809 directly as authors were instructed to do in libpng-0.88 and earlier,
810 instead of using png_create_*().
811 Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which
812 can be used to detect codes that directly allocate the structs, and
813 code to check these modes in png_read_init() and png_write_init() and
814 generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED
816 Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
818 Version 1.0.6j [May 3, 2000]
819 Overloaded png_read_init() and png_write_init() with macros that convert
820 calls to png_read_init_2() or png_write_init_2() that check the version
823 Version 1.0.7beta11 [May 7, 2000]
824 Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
825 which are no longer used.
826 Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
827 defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED
829 Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory
830 overrun when old applications fill the info_ptr->text structure directly.
831 Added PNGAPI macro, and added it to the definitions of all exported functions.
832 Relocated version macro definitions ahead of the includes of zlib.h and
835 Version 1.0.7beta12 [May 12, 2000]
836 Revised pngset.c to avoid a problem with expanding the png_debug macro.
837 Deleted some extraneous defines from pngconf.h
838 Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
839 Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
840 Added png_access_version_number() function.
841 Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
842 Expanded libpng.3/libpng.txt information about png_data_freer().
844 Version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
845 Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
846 warnings instead of errors, as pngrutil.c does.
847 Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
848 will actually write IDATs.
849 Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
850 Make png_free_data() ignore its final parameter except when freeing data
851 that can have multiple instances (text, sPLT, unknowns).
852 Fixed a new bug in png_set_rows().
853 Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
854 Added png_set_invalid() function.
855 Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
857 Version 1.0.7beta15 [May 30, 2000]
858 Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
859 fewer error messages.
860 Rearranged checks for Z_OK to check the most likely path first in pngpread.c
862 Added checks in pngtest.c for png_create_*() returning NULL, and mentioned
863 in libpng.txt/libpng.3 the need for applications to check this.
864 Changed names of png_default_*() functions in pngtest to pngtest_*().
865 Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32.
866 Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c
867 Set each pointer to NULL after freeing it in png_free_data().
868 Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
869 macro that conflicts with libpng's png_color_16.index. (Dimitri
871 Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).
873 Version 1.0.7beta16 [June 4, 2000]
874 Revised the workaround of AIX string.h "index" bug.
875 Added a check for overlength PLTE chunk in pngrutil.c.
876 Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
877 indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
878 Added a warning in png_decompress_chunk() when it runs out of data, e.g.
879 when it tries to read an erroneous PhotoShop iCCP chunk.
880 Added PNG_USE_DLL macro.
881 Revised the copyright/disclaimer/license notice.
882 Added contrib/msvctest directory
884 Version 1.0.7rc1 [June 9, 2000]
885 Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
886 Added contrib/visupng directory (Willem van Schaik)
888 Version 1.0.7beta18 [June 23, 2000]
889 Revised PNGAPI definition, and pngvcrd.c to work with __GCC__
890 and do not redefine PNGAPI if it is passed in via a compiler directive.
891 Revised visupng/PngFile.c to remove returns from within the Try block.
892 Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
893 Updated contrib/visupng/cexcept.h to version 1.0.0.
894 Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
896 Version 1.0.7rc2 [June 28, 2000]
897 Updated license to include disclaimers required by UCITA.
898 Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.
900 Version 1.0.7 [July 1, 2000]
901 Revised the definition of "trans_values" in libpng.3/libpng.txt
903 Version 1.0.8beta1 [July 8, 2000]
904 Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.
905 Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and
907 Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h.
908 Removed unused "#include <assert.h>" from png.c
909 Added WindowsCE support.
910 Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment.
912 Version 1.0.8beta2 [July 10, 2000]
913 Added project files to the wince directory and made further revisions
914 of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE.
916 Version 1.0.8beta3 [July 11, 2000]
917 Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS()
918 for indexed-color input files to avoid potential double-freeing trans array
919 under some unusual conditions; problem was introduced in version 1.0.6f.
920 Further revisions to pngtest.c and files in the wince subdirectory.
922 Version 1.0.8beta4 [July 14, 2000]
923 Added the files pngbar.png and pngbar.jpg to the distribution.
924 Added makefile.cygwin, and cygwin support in pngconf.h
925 Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory)
927 Version 1.0.8rc1 [July 16, 2000]
928 Revised png_debug() macros and statements to eliminate compiler warnings.
930 Version 1.0.8 [July 24, 2000]
931 Added png_flush() in pngwrite.c, after png_write_IEND().
932 Updated makefile.hpux to build a shared library.
934 Version 1.0.9beta1 [November 10, 2000]
935 Fixed typo in scripts/makefile.hpux
936 Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
937 Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
938 Changed "cdrom.com" in documentation to "libpng.org"
939 Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).
940 Changed type of "params" from voidp to png_voidp in png_read|write_png().
941 Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h.
942 Revised the 3 instances of WRITEFILE in pngtest.c.
943 Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory.
944 Updated png.rc in dll/msvc project
945 Revised makefile.dec to define and use LIBPATH and INCPATH
946 Increased size of global png_libpng_ver[] array from 12 to 18 chars.
947 Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const.
948 Removed duplicate png_crc_finish() from png_handle_bKGD() function.
949 Added a warning when application calls png_read_update_info() multiple times.
950 Revised makefile.cygwin
951 Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.
952 Replaced png_set_empty_plte_permitted() with png_permit_mng_features().
954 Version 1.0.9beta2 [November 19, 2000]
955 Renamed the "dll" subdirectory "projects".
956 Added borland project files to "projects" subdirectory.
957 Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.
958 Add error message in png_set_compression_buffer_size() when malloc fails.
960 Version 1.0.9beta3 [November 23, 2000]
961 Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
962 Removed the png_flush() in pngwrite.c that crashes some applications
963 that don't set png_output_flush_fn.
964 Added makefile.macosx and makefile.aix to scripts directory.
966 Version 1.0.9beta4 [December 1, 2000]
967 Change png_chunk_warning to png_warning in png_check_keyword().
968 Increased the first part of msg buffer from 16 to 18 in png_chunk_error().
970 Version 1.0.9beta5 [December 15, 2000]
971 Added support for filter method 64 (for PNG datastreams embedded in MNG).
973 Version 1.0.9beta6 [December 18, 2000]
974 Revised png_set_filter() to accept filter method 64 when appropriate.
975 Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to
976 help prevent applications from using MNG features in PNG datastreams.
977 Added png_permit_mng_features() function.
978 Revised libpng.3/libpng.txt. Changed "filter type" to "filter method".
980 Version 1.0.9rc1 [December 23, 2000]
981 Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c
982 Fixed error handling of unknown compression type in png_decompress_chunk().
983 In pngconf.h, define __cdecl when _MSC_VER is defined.
985 Version 1.0.9beta7 [December 28, 2000]
986 Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.
987 Revised memory management in png_set_hIST and png_handle_hIST in a backward
988 compatible manner. PLTE and tRNS were revised similarly.
989 Revised the iCCP chunk reader to ignore trailing garbage.
991 Version 1.0.9beta8 [January 12, 2001]
992 Moved pngasmrd.h into pngconf.h.
993 Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
995 Version 1.0.9beta9 [January 15, 2001]
996 Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
997 wince and msvc project module definition files.
998 Minor revision of makefile.cygwin.
999 Fixed bug with progressive reading of narrow interlaced images in pngpread.c
1001 Version 1.0.9beta10 [January 16, 2001]
1002 Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.
1003 Fixed "png_mmx_supported" typo in project definition files.
1005 Version 1.0.9beta11 [January 19, 2001]
1006 Updated makefile.sgi to make shared library.
1007 Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED
1008 by default, for the benefit of DLL forward compatibility. These will
1009 be re-enabled in version 1.2.0.
1011 Version 1.0.9rc2 [January 22, 2001]
1012 Revised cygwin support.
1014 Version 1.0.9 [January 31, 2001]
1015 Added check of cygwin's ALL_STATIC in pngconf.h
1016 Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.
1018 Version 1.0.10beta1 [March 14, 2001]
1019 Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc.
1020 Reformatted libpng.3 to eliminate bad line breaks.
1021 Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c
1022 Added prototype for png_mmx_support() near the top of pnggccrd.c
1023 Moved some error checking from png_handle_IHDR to png_set_IHDR.
1024 Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros.
1025 Revised png_mmx_support() function in pnggccrd.c
1026 Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c
1027 Fixed memory leak in contrib/visupng/PngFile.c
1028 Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version)
1029 Added warnings when retrieving or setting gamma=0.
1030 Increased the first part of msg buffer from 16 to 18 in png_chunk_warning().
1032 Version 1.0.10rc1 [March 23, 2001]
1033 Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy,
1035 Revised png_mmx_supported() function in pnggccrd.c to return proper value.
1036 Fixed bug in progressive reading (pngpread.c) with small images (height < 8).
1038 Version 1.0.10 [March 30, 2001]
1039 Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin
1040 Added beos project files (Chris Herborth)
1042 Version 1.0.11beta1 [April 3, 2001]
1043 Added type casts on several png_malloc() calls (Dimitri Papadapoulos).
1044 Removed a no-longer needed AIX work-around from pngconf.h
1045 Changed several "//" single-line comments to C-style in pnggccrd.c
1047 Version 1.0.11beta2 [April 11, 2001]
1048 Removed PNGAPI from several functions whose prototypes did not have PNGAPI.
1049 Updated scripts/pngos2.def
1051 Version 1.0.11beta3 [April 14, 2001]
1052 Added checking the results of many instances of png_malloc() for NULL
1054 Version 1.0.11beta4 [April 20, 2001]
1055 Undid the changes from version 1.0.11beta3. Added a check for NULL return
1056 from user's malloc_fn().
1057 Removed some useless type casts of the NULL pointer.
1058 Added makefile.netbsd
1060 Version 1.0.11 [April 27, 2001]
1061 Revised makefile.netbsd
1063 Version 1.0.12beta1 [May 14, 2001]
1064 Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot)
1065 Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h
1066 Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings.
1067 Eliminated the png_error about apps using png_read|write_init(). Instead,
1068 libpng will reallocate the png_struct and info_struct if they are too small.
1069 This retains future binary compatibility for old applications written for
1070 libpng-0.88 and earlier.
1072 Version 1.2.0beta1 [May 6, 2001]
1074 Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED
1076 Added runtime selection of MMX features.
1077 Added png_set_strip_error_numbers function and related macros.
1079 Version 1.2.0beta2 [May 7, 2001]
1080 Finished merging 1.2.0beta1 with version 1.0.11
1081 Added a check for attempts to read or write PLTE in grayscale PNG datastreams.
1083 Version 1.2.0beta3 [May 17, 2001]
1084 Enabled user memory function by default.
1085 Modified png_create_struct so it passes user mem_ptr to user memory allocator.
1086 Increased png_mng_features flag from png_byte to png_uint_32.
1087 Bumped shared-library (so-number) and dll-number to 3.
1089 Version 1.2.0beta4 [June 23, 2001]
1090 Check for missing profile length field in iCCP chunk and free chunk_data
1091 in case of truncated iCCP chunk.
1092 Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc
1093 Bumped dll-number from 2 to 3 in makefile.cygwin
1094 Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly
1095 if user attempts to run it on an 8-bit display.
1096 Updated contrib/gregbook
1097 Use png_malloc instead of png_zalloc to allocate palette in pngset.c
1098 Updated makefile.ibmc
1099 Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes
1100 of png_write_oFFS width and height from png_uint_32 to png_int_32.
1102 Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c
1104 Version 1.2.0beta5 [August 8, 2001]
1105 Revised contrib/gregbook
1106 Revised makefile.gcmmx
1107 Revised pnggccrd.c to conditionally compile some thread-unsafe code only
1108 when PNG_THREAD_UNSAFE_OK is defined.
1109 Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with
1110 value exceeding 2^bit_depth-1
1111 Revised makefile.sgi and makefile.sggcc
1112 Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c
1113 Removed restriction that do_invert_mono only operate on 1-bit opaque files
1115 Version 1.2.0 [September 1, 2001]
1116 Changed a png_warning() to png_debug() in pnggccrd.c
1117 Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC().
1119 Version 1.2.1beta1 [October 19, 2001]
1120 Revised makefile.std in contrib/pngminus
1121 Include background_1 in png_struct regardless of gamma support.
1122 Revised makefile.netbsd and makefile.macosx, added makefile.darwin.
1123 Revised example.c to provide more details about using row_callback().
1125 Version 1.2.1beta2 [October 25, 2001]
1126 Added type cast to each NULL appearing in a function call, except for
1130 Version 1.2.1beta3 [October 27, 2001]
1131 Removed type casts from all NULLs.
1132 Simplified png_create_struct_2().
1134 Version 1.2.1beta4 [November 7, 2001]
1135 Revised png_create_info_struct() and png_creat_struct_2().
1136 Added error message if png_write_info() was omitted.
1137 Type cast NULLs appearing in function calls when _NO_PROTO or
1138 PNG_TYPECAST_NULL is defined.
1140 Version 1.2.1rc1 [November 24, 2001]
1141 Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL
1143 Changed typecast of "size" argument to png_size_t in pngmem.c calls to
1144 the user malloc_fn, to agree with the prototype in png.h
1145 Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev)
1146 Updated makefile.sgi to recognize LIBPATH and INCPATH.
1147 Updated various makefiles so "make clean" does not remove previous major
1148 version of the shared library.
1150 Version 1.2.1rc2 [December 4, 2001]
1151 Always allocate 256-entry internal palette, hist, and trans arrays, to
1152 avoid out-of-bounds memory reference caused by invalid PNG datastreams.
1153 Added a check for prefix_length > data_length in iCCP chunk handler.
1155 Version 1.2.1 [December 7, 2001]
1158 Version 1.2.2beta1 [February 22, 2002]
1159 Fixed a bug with reading the length of iCCP profiles (Larry Reeves).
1160 Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate
1161 libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h
1162 Revised makefile.darwin to remove "-undefined suppress" option.
1163 Added checks for gamma and chromaticity values over 21474.83, which exceed
1164 the limit for PNG unsigned 32-bit integers when encoded.
1165 Revised calls to png_create_read_struct() and png_create_write_struct()
1166 for simpler debugging.
1167 Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK)
1169 Version 1.2.2beta2 [February 23, 2002]
1170 Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths.
1171 Check for invalid image dimensions in png_get_IHDR.
1172 Added missing "fi;" in the install target of the SGI makefiles.
1173 Added install-static to all makefiles that make shared libraries.
1174 Always do gamma compensation when image is partially transparent.
1176 Version 1.2.2beta3 [March 7, 2002]
1177 Compute background.gray and background_1.gray even when color_type is RGB
1178 in case image gets reduced to gray later.
1179 Modified shared-library makefiles to install pkgconfig/libpngNN.pc.
1180 Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown
1181 Removed unused png_write_destroy_info prototype from png.h
1182 Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case
1183 Added install-shared target to all makefiles that make shared libraries.
1184 Stopped a double free of palette, hist, and trans when not using free_me.
1185 Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64.
1187 Version 1.2.2beta4 [March 8, 2002]
1188 Compute background.gray and background_1.gray even when color_type is RGB
1189 in case image gets reduced to gray later (Jason Summers).
1190 Relocated a misplaced /bin/rm in the "install-shared" makefile targets
1191 Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library.
1193 Version 1.2.2beta5 [March 26, 2002]
1194 Added missing PNGAPI to several function definitions.
1195 Check for invalid bit_depth or color_type in png_get_IHDR(), and
1196 check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen).
1197 Revised iTXt support to accept NULL for lang and lang_key.
1198 Compute gamma for color components of background even when color_type is gray.
1199 Changed "()" to "{}" in scripts/libpng.pc.in.
1200 Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN
1201 Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so
1203 Version 1.2.2beta6 [March 31, 2002]
1205 Version 1.0.13beta1 [March 31, 2002]
1206 Prevent png_zalloc() from trying to memset memory that it failed to acquire.
1207 Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate).
1208 Ensure that the right function (user or default) is used to free the
1209 png_struct after an error in png_create_read_struct_2().
1211 Version 1.2.2rc1 [April 7, 2002]
1213 Version 1.0.13rc1 [April 7, 2002]
1214 Save the ebx register in pnggccrd.c (Sami Farin)
1215 Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner).
1216 Updated makefiles to put headers in include/libpng and remove old include/*.h.
1218 Version 1.2.2 [April 15, 2002]
1220 Version 1.0.13 [April 15, 2002]
1221 Revised description of png_set_filter() in libpng.3/libpng.txt.
1222 Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd
1224 Version 1.0.13patch01 [April 17, 2002]
1226 Version 1.2.2patch01 [April 17, 2002]
1227 Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and
1229 Fixed VER -> PNGVER typo in makefile.macosx and added install-static to
1231 Added install: target to makefile.32sunu and makefile.64sunu
1233 Version 1.0.13patch03 [April 18, 2002]
1235 Version 1.2.2patch03 [April 18, 2002]
1236 Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng
1237 subdirectory to libpngNN subdirectory without the full pathname.
1238 Moved generation of libpng.pc from "install" to "all" in 15 makefiles.
1240 Version 1.2.3rc1 [April 28, 2002]
1241 Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos).
1242 Added $(DESTDIR) feature to 24 makefiles (Tim Mooney)
1243 Fixed bug with $prefix, should be $(prefix) in makefile.hpux.
1244 Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin
1245 Added a link from libpngNN.pc to libpng.pc in 15 makefiles.
1246 Added links from include/libpngNN/*.h to include/*.h in 24 makefiles.
1247 Revised makefile.darwin to make relative links without full pathname.
1248 Added setjmp() at the end of png_create_*_struct_2() in case user forgets
1249 to put one in their application.
1250 Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and
1251 removed them from module definition files.
1253 Version 1.2.3rc2 [May 1, 2002]
1254 Fixed bug in reporting number of channels in pngget.c and pngset.c,
1255 that was introduced in version 1.2.2beta5.
1256 Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(),
1257 png_default_flush(), and png_push_fill_buffer() and included them in
1258 module definition files.
1259 Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles.
1261 Version 1.2.3rc3 [May 1, 2002]
1262 Revised prototype for png_default_flush()
1263 Remove old libpng.pc and libpngNN.pc before installing new ones.
1265 Version 1.2.3rc4 [May 2, 2002]
1266 Typos in *.def files (png_default_read|write -> png_default_read|write_data)
1267 In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc
1268 Added libpng-config and libpngNN-config and modified makefiles to install
1270 Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles
1271 Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp
1273 Version 1.2.3rc5 [May 11, 2002]
1274 Changed "error" and "message" in prototypes to "error_message" and
1275 "warning_message" to avoid namespace conflict.
1276 Revised 15 makefiles to build libpng-config from libpng-config-*.in
1277 Once more restored png_zalloc and png_zfree to regular nonexported form.
1278 Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer
1279 to nonexported form, but with PNGAPI, and removed them from module def
1282 Version 1.2.3rc6 [May 14, 2002]
1283 Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c
1284 Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp.
1285 Removed leftover libpng-config "sed" script from four makefiles.
1286 Revised libpng-config creating script in 16 makefiles.
1288 Version 1.2.3 [May 22, 2002]
1289 Revised libpng-config target in makefile.cygwin.
1290 Removed description of png_set_mem_fn() from documentation.
1291 Revised makefile.freebsd.
1292 Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR).
1293 Revised projects/msvc/README.txt
1294 Changed -lpng to -lpngNN in LDFLAGS in several makefiles.
1296 Version 1.2.4beta1 [May 24, 2002]
1297 Added libpng.pc and libpng-config to "all:" target in 16 makefiles.
1298 Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH)
1299 Added missing "\" before closing double quote in makefile.gcmmx.
1300 Plugged various memory leaks; added png_malloc_warn() and png_set_text_2()
1303 Version 1.2.4beta2 [June 25, 2002]
1304 Plugged memory leak of png_ptr->current_text (Matt Holgate).
1305 Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison)
1306 Added -soname to the loader flags in makefile.dec, makefile.sgi, and
1308 Added "test-installed" target to makefile.linux, makefile.gcmmx,
1309 makefile.sgi, and makefile.sggcc.
1311 Version 1.2.4beta3 [June 28, 2002]
1312 Plugged memory leak of row_buf in pngtest.c when there is a png_error().
1313 Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.
1314 Added "test-installed" target to makefile.32sunu, makefile.64sunu,
1315 makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,
1316 makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.
1318 Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
1319 Added "test-installed" target to makefile.cygwin and makefile.sco.
1320 Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro.
1322 Version 1.2.4 and 1.0.14 [July 8, 2002]
1323 Changed png_warning() to png_error() when width is too large to process.
1325 Version 1.2.4patch01 [July 20, 2002]
1326 Revised makefile.cygwin to use DLL number 12 instead of 13.
1328 Version 1.2.5beta1 [August 6, 2002]
1329 Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
1330 Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
1331 Removed some stray *.o files from contrib/gregbook.
1332 Changed png_error() to png_warning() about "Too much data" in pngpread.c
1333 and about "Extra compressed data" in pngrutil.c.
1334 Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
1335 Updated makefile.hpgcc
1336 Updated png.c and pnggccrd.c handling of return from png_mmx_support()
1338 Version 1.2.5beta2 [August 15, 2002]
1339 Only issue png_warning() about "Too much data" in pngpread.c when avail_in
1341 Updated makefiles to install a separate libpng.so.3 with its own rpath.
1343 Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
1344 Revised makefiles to not remove previous minor versions of shared libraries.
1346 Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
1347 Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
1348 library loader directive.
1349 Added missing "$OBJSDLL" line to makefile.gcmmx.
1350 Added missing "; fi" to makefile.32sunu.
1352 Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
1353 Revised libpng-config script.
1355 Version 1.2.5 and 1.0.15 [October 3, 2002]
1356 Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,
1358 Relocated two misplaced PNGAPI lines in pngtest.c
1360 Version 1.2.6beta1 [October 22, 2002]
1361 Commented out warning about uninitialized mmx_support in pnggccrd.c.
1362 Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.
1363 Relocated two more misplaced PNGAPI lines in pngtest.c
1364 Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams,
1365 introduced in version 1.0.2.
1366 Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu.
1368 Version 1.2.6beta2 [November 1, 2002]
1369 Added libpng-config "--ldopts" output.
1370 Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)"
1373 Version 1.2.6beta3 [July 18, 2004]
1374 Reverted makefile changes from version 1.2.6beta2 and some of the changes
1375 from version 1.2.6beta1; these will be postponed until version 1.2.7.
1376 Version 1.2.6 is going to be a simple bugfix release.
1377 Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile.
1378 Fixed potential overrun in pngerror.c by using strncpy instead of memcpy.
1379 Added "#!/bin/sh" at the top of configure, for recognition of the
1380 'x' flag under Cygwin (Cosmin).
1381 Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin).
1382 Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin).
1383 Fixed the special memory handler for Borland C under DOS, in pngmem.c
1385 Removed some spurious assignments in pngrutil.c (Cosmin).
1386 Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings
1387 on 16-bit platforms (Cosmin).
1388 Enclosed shift op expressions in parentheses, to silence warnings (Cosmin).
1389 Used proper type png_fixed_point, to avoid problems on 16-bit platforms,
1390 in png_handle_sRGB() (Cosmin).
1391 Added compression_type to png_struct, and optimized the window size
1392 inside the deflate stream (Cosmin).
1393 Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin).
1394 Fixed handling of unknown chunks that come after IDAT (Cosmin).
1395 Allowed png_error() and png_warning() to work even if png_ptr == NULL
1397 Replaced row_info->rowbytes with row_bytes in png_write_find_filter()
1399 Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre).
1400 Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded
1401 values in png.c (Simon-Pierre, Cosmin).
1402 Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre).
1403 Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc
1405 Moved the definition of PNG_HEADER_VERSION_STRING near the definitions
1406 of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin).
1407 Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin).
1408 Updated scripts/makefile.vc(a)win32 (Cosmin).
1409 Updated the MSVC project (Simon-Pierre, Cosmin).
1410 Updated the Borland C++ Builder project (Cosmin).
1411 Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin).
1412 Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin).
1413 Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin).
1414 Added extra guard around inclusion of Turbo C memory headers, in pngconf.h
1416 Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to
1417 projects/cbuilder5/ (Cosmin).
1418 Moved projects/visualc6/png32ms.def to scripts/pngw32.def,
1419 and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin).
1420 Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin).
1421 Changed line endings to DOS style in cbuilder5 and visualc6 files, even
1422 in the tar.* distributions (Cosmin).
1423 Updated contrib/visupng/VisualPng.dsp (Cosmin).
1424 Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin).
1425 Added a separate distribution with "configure" and supporting files (Junichi).
1427 Version 1.2.6beta4 [July 28, 2004]
1428 Added user ability to change png_size_t via a PNG_SIZE_T macro.
1429 Added png_sizeof() and png_convert_size() functions.
1430 Added PNG_SIZE_MAX (maximum value of a png_size_t variable.
1431 Added check in png_malloc_default() for (size_t)size != (png_uint_32)size
1432 which would indicate an overflow.
1433 Changed sPLT failure action from png_error to png_warning and abandon chunk.
1434 Changed sCAL and iCCP failures from png_error to png_warning and abandon.
1435 Added png_get_uint_31(png_ptr, buf) function.
1436 Added PNG_UINT_32_MAX macro.
1437 Renamed PNG_MAX_UINT to PNG_UINT_31_MAX.
1438 Made png_zalloc() issue a png_warning and return NULL on potential
1440 Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x
1441 Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4.
1442 Revised Borland portion of png_malloc() to return NULL or issue
1443 png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK.
1444 Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove
1445 sequential read support.
1446 Added some "#if PNG_WRITE_SUPPORTED" blocks.
1447 Added #ifdef to remove some redundancy in png_malloc_default().
1448 Use png_malloc instead of png_zalloc to allocate the pallete.
1450 Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
1451 Fixed buffer overflow vulnerability in png_handle_tRNS()
1452 Fixed integer arithmetic overflow vulnerability in png_read_png().
1453 Fixed some harmless bugs in png_handle_sBIT, etc, that would cause
1454 duplicate chunk types to go undetected.
1455 Fixed some timestamps in the -config version
1456 Rearranged order of processing of color types in png_handle_tRNS().
1457 Added ROWBYTES macro to calculate rowbytes without integer overflow.
1458 Updated makefile.darwin and removed makefile.macosx from scripts directory.
1459 Imposed default one million column, one-million row limits on the image
1460 dimensions, and added png_set_user_limits() function to override them.
1461 Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro.
1462 Fixed wrong cast of returns from png_get_user_width|height_max().
1463 Changed some "keep the compiler happy" from empty statements to returns,
1464 Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution
1466 Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004]
1467 Revised makefile.darwin and makefile.solaris. Removed makefile.macosx.
1468 Revised pngtest's png_debug_malloc() to use png_malloc() instead of
1469 png_malloc_default() which is not supposed to be exported.
1470 Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in
1471 pngpread.c. Bug was introduced in 1.2.6rc1.
1472 Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1.
1473 Fixed old bug in RGB to Gray transformation.
1474 Fixed problem with 64-bit compilers by casting arguments to abs()
1476 Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9).
1477 Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin)
1478 Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles.
1479 Added code to update the row_info->colortype in png_do_read_filler() (MSB).
1481 Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004]
1482 Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid
1483 trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro.
1484 Revised documentation of png_set_keep_unknown_chunks().
1485 Check handle_as_unknown status in pngpread.c, as in pngread.c previously.
1486 Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h
1487 Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c
1489 Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004]
1490 Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of
1491 "pinfo" was out of place).
1493 Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]
1494 Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED
1495 section of png.h where they were inadvertently placed in version rc3.
1497 Version 1.2.6 and 1.0.16 [August 15, 2004]
1498 Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.
1500 Version 1.2.7beta1 [August 26, 2004]
1501 Removed unused pngasmrd.h file.
1502 Removed references to uu.net for archived files. Added references to
1503 PNG Spec (second edition) and the PNG ISO/IEC Standard.
1504 Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR.
1505 Fixed bug with "optimized window size" in the IDAT datastream, that
1506 causes libpng to write PNG files with incorrect zlib header bytes.
1508 Version 1.2.7beta2 [August 28, 2004]
1509 Fixed bug with sCAL chunk and big-endian machines (David Munro).
1510 Undid new code added in 1.2.6rc2 to update the color_type in
1512 Added png_set_add_alpha() that updates color type.
1514 Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]
1515 Revised png_set_strip_filler() to not remove alpha if color_type has alpha.
1517 Version 1.2.7 and 1.0.17 [September 12, 2004]
1519 Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin
1521 Version 1.2.8beta1 [November 1, 2004]
1522 Fixed bug in png_text_compress() that would fail to complete a large block.
1523 Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
1524 strip alpha operation in png_do_strip_filler().
1525 Added PNG_1_2_X definition in pngconf.h
1526 Use #ifdef to comment out png_info_init in png.c and png_read_init in
1527 pngread.c (as of 1.3.0)
1529 Version 1.2.8beta2 [November 2, 2004]
1530 Reduce color_type to a nonalpha type after strip alpha operation in
1531 png_do_strip_filler().
1533 Version 1.2.8beta3 [November 3, 2004]
1534 Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM
1536 Version 1.2.8beta4 [November 12, 2004]
1537 Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).
1538 Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).
1539 Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection
1540 of data type in deflate (Cosmin).
1541 Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of
1542 PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
1544 Version 1.2.8beta5 [November 20, 2004]
1545 Use png_ptr->flags instead of png_ptr->transformations to pass
1546 PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI
1548 Revised handling of SPECIALBUILD, PRIVATEBUILD,
1549 PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
1551 Version 1.2.8rc1 [November 24, 2004]
1552 Moved handling of BUILD macros from pngconf.h to png.h
1553 Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently
1555 Revised scripts/pngw32.rc
1556 Despammed mailing addresses by masking "@" with "at".
1557 Inadvertently installed a supposedly faster test version of pngrutil.c
1559 Version 1.2.8rc2 [November 26, 2004]
1560 Added two missing "\" in png.h
1561 Change tests in pngread.c and pngpread.c to
1562 if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
1563 png_do_read_transformations(png_ptr);
1565 Version 1.2.8rc3 [November 28, 2004]
1566 Reverted pngrutil.c to version libpng-1.2.8beta5.
1567 Added scripts/makefile.elf with supporting code in pngconf.h for symbol
1568 versioning (John Bowler).
1570 Version 1.2.8rc4 [November 29, 2004]
1571 Added projects/visualc7 (Simon-pierre).
1573 Version 1.2.8rc5 [November 29, 2004]
1574 Fixed new typo in scripts/pngw32.rc
1576 Version 1.2.8 [December 3, 2004]
1577 Removed projects/visualc7, added projects/visualc71.
1579 Version 1.2.9beta1 [February 21, 2006]
1580 Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints
1581 Revised man page and libpng.txt to make it clear that one should not call
1582 png_read_end or png_write_end after png_read_png or png_write_png.
1583 Updated references to png-mng-implement mailing list.
1584 Fixed an incorrect typecast in pngrutil.c
1585 Added PNG_NO_READ_SUPPORTED conditional for making a write-only library.
1586 Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional.
1587 Optimized alpha-inversion loops in pngwtran.c
1588 Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c
1589 Make sure num_trans is <= 256 before copying data in png_set_tRNS().
1590 Make sure num_palette is <= 256 before copying data in png_set_PLTE().
1591 Interchanged order of write_swap_alpha and write_invert_alpha transforms.
1592 Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).
1593 Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin).
1594 Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin).
1595 Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16,
1596 png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin).
1597 Added type cast (png_byte) in png_write_sCAL() (Cosmin).
1598 Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin).
1599 Default iTXt support was inadvertently enabled.
1601 Version 1.2.9beta2 [February 21, 2006]
1602 Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
1603 checking for png_read_dither in pngrtran.c
1604 Revised checking of chromaticity limits to accommodate extended RGB
1605 colorspace (John Denker).
1606 Changed line endings in some of the project files to CRLF, even in the
1607 "Unix" tar distributions (Cosmin).
1608 Made png_get_int_32 and png_save_int_32 always available (Cosmin).
1609 Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def
1610 with the newly exported functions.
1611 Eliminated distributions without the "configure" script.
1612 Updated INSTALL instructions.
1614 Version 1.2.9beta3 [February 24, 2006]
1615 Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp
1616 Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)
1617 Removed reference to pngasmrd.h from Makefile.am
1618 Renamed CHANGES to ChangeLog.
1619 Renamed LICENSE to COPYING.
1620 Renamed ANNOUNCE to NEWS.
1621 Created AUTHORS file.
1623 Version 1.2.9beta4 [March 3, 2006]
1624 Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
1625 Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
1626 Removed newline from the end of some error and warning messages.
1627 Removed test for sqrt() from configure.ac and configure.
1628 Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).
1629 Disabled default iTXt support that was inadvertently enabled in
1631 Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
1632 Removed libpng version and date from *.c files.
1634 Version 1.2.9beta5 [March 4, 2006]
1635 Removed trailing blanks from source files.
1636 Put version and date of latest change in each source file, and changed
1637 copyright year accordingly.
1638 More cleanup of configure.ac, Makefile.am, and associated scripts.
1639 Restored scripts/makefile.elf which was inadvertently deleted.
1641 Version 1.2.9beta6 [March 6, 2006]
1642 Fixed typo (RELEASE) in configuration files.
1644 Version 1.2.9beta7 [March 7, 2006]
1645 Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
1646 Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()
1648 Updated makefile.elf as suggested by debian.
1649 Made cosmetic changes to some makefiles, adding LN_SF and other macros.
1650 Made some makefiles accept "exec_prefix".
1652 Version 1.2.9beta8 [March 9, 2006]
1653 Fixed some "#if defined (..." which should be "#if defined(..."
1654 Bug introduced in libpng-1.2.8.
1655 Fixed inconsistency in definition of png_default_read_data()
1656 Restored blank that was lost from makefile.sggcc "clean" target in beta7.
1657 Revised calculation of "current" and "major" for irix in ltmain.sh
1658 Changed "mkdir" to "MKDIR_P" in some makefiles.
1659 Separated PNG_EXPAND and PNG_EXPAND_tRNS.
1660 Added png_set_expand_gray_1_2_4_to_8() and deprecated
1661 png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.
1663 Version 1.2.9beta9 [March 10, 2006]
1664 Include "config.h" in pngconf.h when available.
1665 Added some checks for NULL png_ptr or NULL info_ptr (timeless)
1667 Version 1.2.9beta10 [March 20, 2006]
1668 Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)
1669 Made pnggccrd.c PIC-compliant (Christian Aichinger).
1670 Added makefile.mingw (Wolfgang Glas).
1671 Revised pngconf.h MMX checking.
1673 Version 1.2.9beta11 [March 22, 2006]
1674 Fixed out-of-order declaration in pngwrite.c that was introduced in beta9
1675 Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.
1677 Version 1.2.9rc1 [March 31, 2006]
1678 Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).
1679 Removed nonsensical assertion check from pngtest.c (Cosmin).
1681 Version 1.2.9 [April 14, 2006]
1682 Revised makefile.beos and added "none" selector in ltmain.sh
1684 Version 1.2.10beta1 [April 15, 2006]
1685 Renamed "config.h" to "png_conf.h" and revised Makefile.am to add
1686 -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h
1687 to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.
1689 Version 1.2.10beta2 [April 15, 2006]
1690 Manually updated Makefile.in and configure. Changed png_conf.h.in
1693 Version 1.2.10beta3 [April 15, 2006]
1694 Change png_conf.h back to config.h in pngconf.h.
1696 Version 1.2.10beta4 [April 16, 2006]
1697 Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.
1699 Version 1.2.10beta5 [April 16, 2006]
1700 Added a configure check for compiling assembler code in pnggccrd.c
1702 Version 1.2.10beta6 [April 17, 2006]
1703 Revised the configure check for pnggccrd.c
1704 Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@
1705 Added @LIBPNG_DEFINES@ to arguments when building libpng.sym
1707 Version 1.2.10beta7 [April 18, 2006]
1708 Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.
1710 Version 1.2.10rc1 [April 19, 2006]
1711 Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD
1712 Fixed "LN_FS" typo in makefile.sco and makefile.solaris.
1714 Version 1.2.10rc2 [April 20, 2006]
1715 Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE
1716 in configure.ac and configure
1717 Made the configure warning about versioned symbols less arrogant.
1719 Version 1.2.10rc3 [April 21, 2006]
1720 Added a note in libpng.txt that png_set_sig_bytes(8) can be used when
1721 writing an embedded PNG without the 8-byte signature.
1722 Revised makefiles and configure to avoid making links to libpng.so.*
1724 Version 1.2.10 [April 23, 2006]
1725 Reverted configure to "rc2" state.
1727 Version 1.2.11beta1 [May 31, 2006]
1728 scripts/libpng.pc.in contained "configure" style version info and would
1729 not work with makefiles.
1730 The shared-library makefiles were linking to libpng.so.0 instead of
1731 libpng.so.3 compatibility as the library.
1733 Version 1.2.11beta2 [June 2, 2006]
1734 Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1736 Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb)
1738 Version 1.2.11beta3 [June 5, 2006]
1739 Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin).
1740 Removed the accidental leftover Makefile.in~ (Cosmin).
1741 Avoided potential buffer overflow and optimized buffer in
1742 png_write_sCAL(), png_write_sCAL_s() (Cosmin).
1743 Removed the include directories and libraries from CFLAGS and LDFLAGS
1744 in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin).
1746 Version 1.2.11beta4 [June 6, 2006]
1747 Allow zero-length IDAT chunks after the entire zlib datastream, but not
1748 after another intervening chunk type.
1750 Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]
1751 Deleted extraneous square brackets from [config.h] in configure.ac
1753 Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]
1754 Added prototypes for PNG_INCH_CONVERSIONS functions to png.h
1755 Revised INSTALL and autogen.sh
1756 Fixed typo in several makefiles (-W1 should be -Wl)
1757 Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
1759 Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]
1760 Removed the new typedefs for 64-bit systems (delay until version 1.4.0)
1761 Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid
1762 reading out of bounds.
1764 Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]
1765 Really removed the new typedefs for 64-bit systems.
1767 Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]
1768 Removed png_sig_bytes entry from scripts/pngw32.def
1770 Version 1.0.19, 1.2.11 [June 26, 2006]
1773 Version 1.0.20, 1.2.12 [June 27, 2006]
1774 Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1777 Version 1.2.13beta1 [October 2, 2006]
1778 Removed AC_FUNC_MALLOC from configure.ac
1779 Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
1780 Change "logical" to "bitwise" throughout documentation.
1781 Detect and fix attempt to write wrong iCCP profile length.
1783 Version 1.0.21, 1.2.13 [November 14, 2006]
1784 Fix potential buffer overflow in sPLT chunk handler.
1785 Fix Makefile.am to not try to link to noexistent files.
1786 Check all exported functions for NULL png_ptr.
1788 Version 1.2.14beta1 [November 17, 2006]
1789 Relocated three misplaced tests for NULL png_ptr.
1790 Built Makefile.in with automake-1.9.6 instead of 1.9.2.
1791 Build configure with autoconf-2.60 instead of 2.59
1793 Version 1.2.14beta2 [November 17, 2006]
1794 Added some typecasts in png_zalloc().
1796 Version 1.2.14rc1 [November 20, 2006]
1797 Changed "strtod" to "png_strtod" in pngrutil.c
1799 Version 1.0.22, 1.2.14 [November 27, 2006]
1800 Added missing "$(srcdir)" in Makefile.am and Makefile.in
1802 Version 1.2.15beta1 [December 3, 2006]
1803 Generated configure with autoconf-2.61 instead of 2.60
1804 Revised configure.ac to update libpng.pc and libpng-config.
1806 Version 1.2.15beta2 [December 3, 2006]
1807 Always export MMX asm functions, just stubs if not building pnggccrd.c
1809 Version 1.2.15beta3 [December 4, 2006]
1810 Add "png_bytep" typecast to profile while calculating length in pngwutil.c
1812 Version 1.2.15beta4 [December 7, 2006]
1813 Added scripts/CMakeLists.txt
1814 Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta
1816 Version 1.2.15beta5 [December 7, 2006]
1817 Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c
1818 Revised scripts/CMakeLists.txt
1820 Version 1.2.15beta6 [December 13, 2006]
1821 Revised scripts/CMakeLists.txt and configure.ac
1823 Version 1.2.15rc1 [December 18, 2006]
1824 Revised scripts/CMakeLists.txt
1826 Version 1.2.15rc2 [December 21, 2006]
1827 Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
1828 Added scripts/makefile.nommx
1830 Version 1.2.15rc3 [December 25, 2006]
1831 Fixed shared library numbering error that was introduced in 1.2.15beta6.
1833 Version 1.2.15rc4 [December 27, 2006]
1834 Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.
1836 Version 1.2.15rc5 [December 31, 2006]
1837 Revised handling of rgb_to_gray.
1839 Version 1.2.15 [January 5, 2007]
1840 Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
1842 Version 1.2.16beta1 [January 6, 2007]
1843 Fix bugs in makefile.nommx
1845 Version 1.2.16beta2 [January 16, 2007]
1846 Revised scripts/CMakeLists.txt
1848 Version 1.2.16 [January 31, 2007]
1851 Version 1.2.17beta1 [March 6, 2007]
1852 Revised scripts/CMakeLists.txt to install both shared and static libraries.
1853 Deleted a redundant line from pngset.c.
1855 Version 1.2.17beta2 [April 26, 2007]
1856 Relocated misplaced test for png_ptr == NULL in pngpread.c
1857 Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN
1859 Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_*
1860 Added pngerror() when write_IHDR fails in deflateInit2().
1861 Added "const" to some array declarations.
1862 Mention examples of libpng usage in the libpng*.txt and libpng.3 documents.
1864 Version 1.2.17rc1 [May 4, 2007]
1867 Version 1.2.17rc2 [May 8, 2007]
1868 Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications
1869 calling set_unknown_chunk_location() need them.
1870 Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in
1871 png_set_expand_gray_1_2_4_to_8().
1872 Added png_ptr->unknown_chunk to hold working unknown chunk data, so it
1873 can be free'ed in case of error. Revised unknown chunk handling in
1874 pngrutil.c and pngpread.c to use this structure.
1876 Version 1.2.17rc3 [May 8, 2007]
1877 Revised symbol-handling in configure script.
1879 Version 1.2.17rc4 [May 10, 2007]
1880 Revised unknown chunk handling to avoid storing unknown critical chunks.
1882 Version 1.0.25 [May 15, 2007]
1883 Version 1.2.17 [May 15, 2007]
1884 Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,
1885 to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664)
1887 Version 1.0.26 [May 15, 2007]
1888 Version 1.2.18 [May 15, 2007]
1889 Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script
1891 Version 1.2.19beta1 [May 18, 2007]
1892 Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
1893 change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST"
1894 Changed some handling of unused parameters, to avoid compiler warnings.
1895 "if (unused == NULL) return;" becomes "unused = unused".
1897 Version 1.2.19beta2 [May 18, 2007]
1898 Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier)
1900 Version 1.2.19beta3 [May 19, 2007]
1901 Add some "png_byte" typecasts in png_check_keyword() and write new_key
1902 instead of key in zTXt chunk (Kevin Ryde).
1904 Version 1.2.19beta4 [May 21, 2007]
1905 Add png_snprintf() function and use it in place of sprint() for improved
1906 defense against buffer overflows.
1908 Version 1.2.19beta5 [May 21, 2007]
1909 Fixed png_handle_tRNS() to only use the valid bits of tRNS value.
1910 Changed handling of more unused parameters, to avoid compiler warnings.
1911 Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.
1913 Version 1.2.19beta6 [May 22, 2007]
1914 Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
1915 Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
1917 Version 1.2.19beta7 [May 22, 2007]
1918 Squelched png_squelch_warnings() in pnggccrd.c and added
1919 an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
1920 the warnings that png_squelch_warnings was squelching.
1922 Version 1.2.19beta8 [May 22, 2007]
1923 Removed __MMX__ from test in pngconf.h.
1925 Version 1.2.19beta9 [May 23, 2007]
1926 Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
1927 Revised png_squelch_warnings() so it might work.
1928 Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.
1930 Version 1.2.19beta10 [May 24, 2007]
1931 Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.
1933 Version 1.4.0beta1 [April 20, 2006]
1934 Enabled iTXt support (changes png_struct, thus requires so-number change).
1935 Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED
1936 Eliminated PNG_1_0_X and PNG_1_2_X macros.
1937 Removed deprecated functions png_read_init, png_write_init, png_info_init,
1938 png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and
1939 removed the deprecated macro PNG_MAX_UINT.
1940 Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h
1941 Removed many WIN32_WCE #ifdefs (Cosmin).
1942 Reduced dependency on C-runtime library when on Windows (Simon-Pierre)
1943 Replaced sprintf() with png_sprintf() (Simon-Pierre)
1945 Version 1.4.0beta2 [April 20, 2006]
1946 Revised makefiles and configure to avoid making links to libpng.so.*
1947 Moved some leftover MMX-related defines from pngconf.h to pngintrn.h
1948 Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def
1950 Version 1.4.0beta3 [May 10, 2006]
1951 Updated scripts/pngw32.def to comment out MMX functions.
1952 Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros.
1953 Scripts/libpng.pc.in contained "configure" style version info and would
1954 not work with makefiles.
1955 Revised pngconf.h and added pngconf.h.in, so makefiles and configure can
1956 pass defines to libpng and applications.
1958 Version 1.4.0beta4 [May 11, 2006]
1959 Revised configure.ac, Makefile.am, and many of the makefiles to write
1960 their defines in pngconf.h.
1962 Version 1.4.0beta5 [May 15, 2006]
1963 Added a missing semicolon in Makefile.am and Makefile.in
1964 Deleted extraneous square brackets from configure.ac
1966 Version 1.4.0beta6 [June 2, 2006]
1967 Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1969 Changed sonum from 0 to 1.
1970 Removed unused prototype for png_check_sig() from png.h
1972 Version 1.4.0beta7 [June 16, 2006]
1973 Exported png_write_sig (Cosmin).
1974 Optimized buffer in png_handle_cHRM() (Cosmin).
1975 Set pHYs = 2835 x 2835 pixels per meter, and added
1976 sCAL = 0.352778e-3 x 0.352778e-3 meters, in pngtest.png (Cosmin).
1977 Added png_set_benign_errors(), png_benign_error(), png_chunk_benign_error().
1978 Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
1979 Added "(unsigned long)" typecast on png_uint_32 variables in printf lists.
1981 Version 1.4.0beta8 [June 22, 2006]
1982 Added demonstration of user chunk support in pngtest.c, to support the
1983 public sTER chunk and a private vpAg chunk.
1985 Version 1.4.0beta9 [July 3, 2006]
1986 Removed ordinals from scripts/pngw32.def and removed png_info_int and
1987 png_set_gray_1_2_4_to_8 entries.
1988 Inline call of png_get_uint_32() in png_get_uint_31().
1989 Use png_get_uint_31() to get vpAg width and height in pngtest.c
1990 Removed WINCE and Netware projects.
1991 Removed standalone Y2KINFO file.
1993 Version 1.4.0beta10 [July 12, 2006]
1994 Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and
1995 some makefiles, because it was not working reliably. Instead, distribute
1996 pngconf.h.in along with pngconf.h and cause configure and some of the
1997 makefiles to update pngconf.h from pngconf.h.in.
1998 Added pngconf.h to DEPENDENCIES in Makefile.am
2000 Version 1.4.0beta11 [August 19, 2006]
2001 Removed AC_FUNC_MALLOC from configure.ac.
2002 Added a warning when writing iCCP profile with mismatched profile length.
2003 Patched pnggccrd.c to assemble on x86_64 platforms.
2004 Moved chunk header reading into a separate function png_read_chunk_header()
2005 in pngrutil.c. The chunk header (len+sig) is now serialized in a single
2007 Implemented support for I/O states. Added png_ptr member io_state, and
2008 functions png_get_io_chunk_name() and png_get_io_state() in pngget.c
2010 Added png_get_io_chunk_name and png_get_io_state to scripts/*.def (Cosmin).
2011 Renamed scripts/pngw32.* to scripts/pngwin.* (Cosmin).
2012 Removed the include directories and libraries from CFLAGS and LDFLAGS
2013 in scripts/makefile.gcc (Cosmin).
2014 Used png_save_uint_32() to set vpAg width and height in pngtest.c (Cosmin).
2015 Cast to proper type when getting/setting vpAg units in pngtest.c (Cosmin).
2016 Added pngintrn.h to the Visual C++ projects (Cosmin).
2017 Removed scripts/list (Cosmin).
2018 Updated copyright year in scripts/pngwin.def (Cosmin).
2019 Removed PNG_TYPECAST_NULL and used standard NULL consistently (Cosmin).
2020 Disallowed the user to redefine png_size_t, and enforced a consistent use
2021 of png_size_t across libpng (Cosmin).
2022 Changed the type of png_ptr->rowbytes, PNG_ROWBYTES() and friends
2023 to png_size_t (Cosmin).
2024 Removed png_convert_size() and replaced png_sizeof with sizeof (Cosmin).
2025 Removed some unnecessary type casts (Cosmin).
2026 Changed prototype of png_get_compression_buffer_size() and
2027 png_set_compression_buffer_size() to work with png_size_t instead of
2028 png_uint_32 (Cosmin).
2029 Removed png_memcpy_check() and png_memset_check() (Cosmin).
2030 Fixed a typo (png_byte --> png_bytep) in libpng.3 and libpng.txt (Cosmin).
2031 Clarified that png_zalloc() does not clear the allocated memory,
2032 and png_zalloc() and png_zfree() cannot be PNGAPI (Cosmin).
2033 Renamed png_mem_size_t to png_alloc_size_t, fixed its definition in
2034 pngconf.h, and used it in all memory allocation functions (Cosmin).
2035 Renamed pngintrn.h to pngpriv.h, added a comment at the top of the file
2036 mentioning that the symbols declared in that file are private, and
2037 updated the scripts and the Visual C++ projects accordingly (Cosmin).
2038 Removed circular references between pngconf.h and pngconf.h.in in
2039 scripts/makefile.vc*win32 (Cosmin).
2040 Removing trailing '.' from the warning and error messages (Cosmin).
2041 Added pngdefs.h that is built by makefile or configure, instead of
2042 pngconf.h.in (Glenn).
2043 Detect and fix attempt to write wrong iCCP profile length.
2045 Version 1.4.0beta12 [October 19, 2006]
2046 Changed "logical" to "bitwise" in the documentation.
2047 Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
2048 Add a typecast to stifle compiler warning in pngrutil.c
2050 Version 1.4.0beta13 [November 10, 2006]
2051 Fix potential buffer overflow in sPLT chunk handler.
2052 Fix Makefile.am to not try to link to noexistent files.
2054 Version 1.4.0beta14 [November 15, 2006]
2055 Check all exported functions for NULL png_ptr.
2057 Version 1.4.0beta15 [November 17, 2006]
2058 Relocated two misplaced tests for NULL png_ptr.
2059 Built Makefile.in with automake-1.9.6 instead of 1.9.2.
2060 Build configure with autoconf-2.60 instead of 2.59
2061 Add "install: all" in Makefile.am so "configure; make install" will work.
2063 Version 1.4.0beta16 [November 17, 2006]
2064 Added a typecast in png_zalloc().
2066 Version 1.4.0beta17 [December 4, 2006]
2067 Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c
2068 Add "png_bytep" typecast to profile while calculating length in pngwutil.c
2070 Version 1.4.0beta18 [December 7, 2006]
2071 Added scripts/CMakeLists.txt
2073 Version 1.4.0beta19 [May 16, 2007]
2074 Revised scripts/CMakeLists.txt
2075 Rebuilt configure and Makefile.in with newer tools.
2076 Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
2077 Added scripts/makefile.nommx
2079 Version 1.4.0beta20 [July 9, 2008]
2080 Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications
2081 calling set_unknown_chunk_location() need them.
2082 Moved several macro definitions from pngpriv.h to pngconf.h
2083 Merge with changes to the 1.2.X branch, as of 1.2.30beta04.
2084 Deleted all use of the MMX assembler code and Intel-licensed optimizations.
2085 Revised makefile.mingw
2087 Version 1.4.0beta21 [July 21, 2008]
2088 Moved local array "chunkdata" from pngrutil.c to the png_struct, so
2089 it will be freed by png_read_destroy() in case of a read error (Kurt
2092 Version 1.4.0beta22 [July 21, 2008]
2093 Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking.
2095 Version 1.4.0beta23 [July 22, 2008]
2096 Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in
2097 png_decompress_chunk().
2099 Version 1.4.0beta24 [July 25, 2008]
2100 Change all remaining "chunkdata" to "png_ptr->chunkdata" in
2101 png_decompress_chunk(), and remove "chunkdata" from parameter list.
2102 Put a call to png_check_chunk_name() in png_read_chunk_header().
2103 Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte.
2104 Removed two calls to png_check_chunk_name() occuring later in the process.
2105 Define PNG_NO_ERROR_NUMBERS by default in pngconf.h
2107 Version 1.4.0beta25 [July 30, 2008]
2108 Added a call to png_check_chunk_name() in pngpread.c
2109 Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte.
2110 Added png_push_have_buffer() function to pngpread.c
2111 Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros.
2112 Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS.
2113 Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code.
2114 Synced contrib directory and configure files with libpng-1.2.30beta06.
2115 Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles)
2116 Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c
2118 Version 1.4.0beta26 [August 4, 2008]
2119 Removed png_push_have_buffer() function in pngpread.c. It increased the
2120 compiled library size slightly.
2121 Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta)
2122 Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings.
2123 Updated contrib/visupng/cexcept.h to version 2.0.1
2124 Added PNG_LITERAL_CHARACTER macros for #, [, and ].
2126 Version 1.4.0beta27 [August 5, 2008]
2127 Revised usage of PNG_LITERAL_SHARP in pngerror.c.
2128 Moved newline character from individual png_debug messages into the
2130 Allow user to #define their own png_debug, png_debug1, and png_debug2.
2132 Version 1.4.0beta28 [August 5, 2008]
2133 Revised usage of PNG_LITERAL_SHARP in pngerror.c.
2134 Added PNG_STRING_NEWLINE macro
2136 Version 1.4.0beta29 [August 9, 2008]
2137 Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers.
2138 Added PNG_STRING_COPYRIGHT macro.
2139 Added non-ISO versions of png_debug macros.
2141 Version 1.4.0beta30 [August 14, 2008]
2142 Added premultiplied alpha feature (Volker Wiendl).
2144 Version 1.4.0beta31 [August 18, 2008]
2145 Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c
2146 Removed extra crc check at the end of png_handle_cHRM(). Bug introduced
2147 in libpng-1.4.0beta20.
2149 Version 1.4.0beta32 [August 19, 2008]
2150 Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.
2151 Revised PNG_NO_STDIO version of png_write_flush()
2153 Version 1.4.0beta33 [August 20, 2008]
2154 Added png_get|set_chunk_cache_max() to limit the total number of sPLT,
2155 text, and unknown chunks that can be stored.
2157 Version 1.4.0beta34 [September 6, 2008]
2158 Shortened tIME_string to 29 bytes in pngtest.c
2159 Fixed off-by-one error introduced in png_push_read_zTXt() function in
2160 libpng-1.2.30beta04/pngpread.c (Harald van Dijk)
2162 Version 1.4.0beta35 [October 6, 2008]
2163 Changed "trans_values" to "trans_color".
2164 Changed so-number from 0 to 14. Some OS do not like 0.
2165 Revised makefile.darwin to fix shared library numbering.
2166 Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8()
2167 in example.c (debian bug report)
2169 Version 1.4.0beta36 [October 25, 2008]
2170 Sync with tEXt vulnerability fix in libpng-1.2.33rc02.
2172 Version 1.4.0beta37 [November 13, 2008]
2173 Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c,
2176 Version 1.4.0beta38 [November 22, 2008]
2177 Added check for zero-area RGB cHRM triangle in png_check_cHRM() and
2178 png_check_cHRM_fixed().
2180 Version 1.4.0beta39 [November 23, 2008]
2181 Revised png_warning() to write its message on standard output by default
2182 when warning_fn is NULL.
2184 Version 1.4.0beta40 [November 24, 2008]
2185 Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed().
2186 In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant
2187 check for all-zero coordinates that is detected by the triangle check.
2189 Version 1.4.0beta41 [November 26, 2008]
2190 Fixed string vs pointer-to-string error in png_check_keyword().
2191 Rearranged test expressions in png_check_cHRM_fixed() to avoid internal
2193 Added PNG_NO_CHECK_cHRM conditional.
2195 Version 1.4.0beta42, 43 [December 1, 2008]
2196 Merge png_debug with version 1.2.34beta04.
2198 Version 1.4.0beta44 [December 6, 2008]
2199 Removed redundant check for key==NULL before calling png_check_keyword()
2200 to ensure that new_key gets initialized and removed extra warning
2201 (Merge with version 1.2.34beta05 -- Arvan Pritchard).
2203 Version 1.4.0beta45 [December 9, 2008]
2204 In png_write_png(), respect the placement of the filler bytes in an earlier
2205 call to png_set_filler() (Jim Barry).
2207 Version 1.4.0beta46 [December 10, 2008]
2208 Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and
2209 PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated
2210 PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
2212 Version 1.4.0beta47 [December 15, 2008]
2213 Support for dithering was disabled by default, because it has never
2214 been well tested and doesn't work very well. The code has not
2215 been removed, however, and can be enabled by building libpng with
2216 PNG_READ_DITHER_SUPPORTED defined.
2218 Version 1.4.0beta48 [February 14, 2009]
2219 Added new exported function png_calloc().
2220 Combined several instances of png_malloc(); png_memset() into png_calloc().
2221 Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
2222 but was never defined.
2224 Version 1.4.0beta49 [February 28, 2009]
2225 Added png_fileno() macro to pngconf.h, used in pngwio.c
2226 Corrected order of #ifdef's in png_debug definition in png.h
2227 Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments
2229 Fixed order of #ifdef directives in the png_debug defines in png.h
2230 (bug introduced in libpng-1.2.34/1.4.0beta29).
2231 Revised comments in png_set_read_fn() and png_set_write_fn().
2233 Version 1.4.0beta50 [March 18, 2009]
2234 Use png_calloc() instead of png_malloc() to allocate big_row_buf when
2235 reading an interlaced file, to avoid a possible UMR.
2236 Undid revision of PNG_NO_STDIO version of png_write_flush(). Users
2237 having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined
2238 or supply their own flush_fn() replacement.
2239 Revised libpng*.txt and png.h documentation about use of png_write_flush()
2240 and png_set_write_fn().
2241 Removed fflush() from pngtest.c.
2242 Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
2244 Version 1.4.0beta51 [March 21, 2009]
2245 Removed new png_fileno() macro from pngconf.h .
2247 Version 1.4.0beta52 [March 27, 2009]
2248 Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
2249 This avoids building 16-bit gamma tables unnecessarily.
2250 Removed fflush() from pngtest.c.
2251 Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
2252 Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt
2254 Version 1.4.0beta53 [April 1, 2009]
2255 Removed some remaining MMX macros from pngpriv.h
2256 Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)
2258 Version 1.4.0beta54 [April 13, 2009]
2259 Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow
2260 application code writers to bypass the check for multiple inclusion
2261 of setjmp.h when they know that it is safe to ignore the situation.
2262 Eliminated internal use of setjmp() in pngread.c and pngwrite.c
2263 Reordered ancillary chunks in pngtest.png to be the same as what
2264 pngtest now produces, and made some cosmetic changes to pngtest output.
2265 Eliminated deprecated png_read_init_3() and png_write_init_3() functions.
2267 Version 1.4.0beta55 [April 15, 2009]
2268 Simplified error handling in pngread.c and pngwrite.c by putting
2269 the new png_read_cleanup() and png_write_cleanup() functions inline.
2271 Version 1.4.0beta56 [April 25, 2009]
2272 Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress
2273 "shadowed declaration" warning from gcc-4.3.3.
2274 Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"
2275 warning about a global "gamma" variable in math.h on some platforms.
2277 Version 1.4.0beta57 [May 2, 2009]
2278 Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
2279 but was never defined (again).
2280 Rebuilt configure scripts with autoconf-2.63 instead of 2.62
2281 Removed pngprefs.h and MMX from makefiles
2283 Version 1.4.0beta58 [May 14, 2009]
2284 Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced
2286 Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
2288 Version 1.4.0beta59 [May 15, 2009]
2289 Reformated sources in libpng style (3-space intentation, comment format)
2290 Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)
2291 Added sections about the git repository and our coding style to the
2293 Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.
2295 Version 1.4.0beta60 [May 19, 2009]
2296 Conditionally compile png_read_finish_row() which is not used by
2297 progressive readers.
2298 Added contrib/pngminim/preader to demonstrate building minimal progressive
2299 decoder, based on contrib/gregbook with embedded libpng and zlib.
2301 Version 1.4.0beta61 [May 20, 2009]
2302 In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there
2303 is only one makefile in those directories, and revised the README files
2305 More reformatting of comments, mostly to capitalize sentences.
2307 Version 1.4.0beta62 [June 2, 2009]
2308 Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
2309 and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
2310 Reformatted several remaining "else statement" into two lines.
2311 Added a section to the libpng documentation about using png_get_io_ptr()
2312 in configure scripts to detect the presence of libpng.
2314 Version 1.4.0beta63 [June 15, 2009]
2315 Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
2316 multiple times and to specify the sample order in the tRNS chunk,
2317 because the ISO PNG specification has a typo in the tRNS table.
2318 Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
2319 PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
2320 available for ignoring known chunks even when not saving unknown chunks.
2321 Adopted preference for consistent use of "#ifdef" and "#ifndef" versus
2322 "#if defined()" and "if !defined()" where possible.
2324 Version 1.4.0beta64 [June 24, 2009]
2325 Eliminated PNG_LEGACY_SUPPORTED code.
2326 Moved the various unknown chunk macro definitions outside of the
2327 PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
2329 Version 1.4.0beta65 [June 26, 2009]
2330 Added a reference to the libpng license in each file.
2332 Version 1.4.0beta66 [June 27, 2009]
2333 Refer to the libpng license instead of the libpng license in each file.
2335 Version 1.4.0beta67 [July 6, 2009]
2336 Relocated INVERT_ALPHA within png_read_png() and png_write_png().
2337 Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.
2338 Added an "xcode" project to the projects directory (Alam Arias).
2340 Version 1.4.0beta68 [July 19, 2009]
2341 Avoid some tests in filter selection in pngwutil.c
2343 Version 1.4.0beta69 [July 25, 2009]
2344 Simplified the new filter-selection test. This runs faster in the
2345 common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases.
2346 Removed extraneous declaration from the new call to png_read_gray_to_rgb()
2347 (bug introduced in libpng-1.4.0beta67).
2348 Fixed up xcode project (Alam Arias)
2349 Added a prototype for png_64bit_product() in png.c
2351 Version 1.4.0beta70 [July 27, 2009]
2352 Avoid a possible NULL dereference in debug build, in png_set_text_2().
2353 (bug introduced in libpng-0.95, discovered by Evan Rouault)
2355 Version 1.4.0beta71 [July 29, 2009]
2356 Rebuilt configure scripts with autoconf-2.64.
2358 Version 1.4.0beta72 [August 1, 2009]
2359 Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec
2360 from <http://tukaani.org/xz>.
2362 Version 1.4.0beta73 [August 1, 2009]
2363 Reject attempt to write iCCP chunk with negative embedded profile length
2366 Version 1.4.0beta74 [August 8, 2009]
2367 Changed png_ptr and info_ptr member "trans" to "trans_alpha".
2369 Version 1.4.0beta75 [August 21, 2009]
2370 Removed an extra png_debug() recently added to png_write_find_filter().
2371 Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
2373 Version 1.4.0beta76 [August 22, 2009]
2374 Moved an incorrectly located test in png_read_row() in pngread.c
2376 Version 1.4.0beta77 [August 27, 2009]
2377 Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt,
2378 and the "noconfig" files from the distribution.
2379 Moved CMakeLists.txt from scripts into the main libpng directory.
2380 Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
2382 Version 1.4.0beta78 [August 31, 2009]
2383 Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
2384 Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros.
2385 Use png_malloc plus a loop instead of png_calloc() to initialize
2386 row_pointers in png_read_png().
2388 Version 1.4.0beta79 [September 1, 2009]
2389 Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays.
2390 Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc().
2392 Version 1.4.0beta80 [September 17, 2009]
2393 Removed scripts/libpng.icc
2394 Changed typecast of filler from png_byte to png_uint_16 in png_set_filler().
2396 Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ")
2398 Version 1.4.0beta81 [September 23, 2009]
2399 Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h
2400 Expanded TAB characters in pngrtran.c
2401 Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid
2402 compiler complaints about doubly declaring things "const".
2403 Changed all "#if [!]defined(X)" to "if[n]def X" where possible.
2404 Eliminated unused png_ptr->row_buf_size
2406 Version 1.4.0beta82 [September 25, 2009]
2407 Moved redundant IHDR checking into new png_check_IHDR() in png.c
2408 and report all errors found in the IHDR data.
2409 Eliminated useless call to png_check_cHRM() from pngset.c
2411 Version 1.4.0beta83 [September 25, 2009]
2412 Revised png_check_IHDR() to eliminate bogus complaint about filter_type.
2414 Version 1.4.0beta84 [September 30, 2009]
2415 Fixed some inconsistent indentation in pngconf.h
2416 Revised png_check_IHDR() to add a test for width variable less than 32-bit.
2418 Version 1.4.0beta85 [October 1, 2009]
2419 Revised png_check_IHDR() again, to check info_ptr members instead of
2420 the contents of the returned parameters.
2422 Version 1.4.0beta86 [October 9, 2009]
2423 Updated the "xcode" project (Alam Arias).
2424 Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
2426 Version 1.4.0rc01 [October 19, 2009]
2427 Trivial cosmetic changes.
2429 Version 1.4.0beta87 [October 30, 2009]
2430 Moved version 1.4.0 back into beta.
2432 Version 1.4.0beta88 [October 30, 2009]
2433 Revised libpng*.txt section about differences between 1.2.x and 1.4.0
2434 because most of the new features have now been ported back to 1.2.41
2436 Version 1.4.0beta89 [November 1, 2009]
2437 More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
2438 Removed a harmless extra png_set_invert_alpha() from pngwrite.c
2439 Apply png_user_chunk_cache_max within png_decompress_chunk().
2440 Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.
2442 Version 1.4.0beta90 [November 2, 2009]
2443 Removed all remaining WIN32_WCE #ifdefs except those involving the
2444 time.h "tm" structure
2446 Version 1.4.0beta91 [November 3, 2009]
2447 Updated scripts/pngw32.def and projects/wince/png32ce.def
2448 Copied projects/wince/png32ce.def to the scripts directory.
2449 Added scripts/makefile.wce
2450 Patched ltmain.sh for wince support.
2451 Added PNG_CONVERT_tIME_SUPPORTED macro.
2453 Version 1.4.0beta92 [November 4, 2009]
2454 Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
2455 Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED
2456 Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead
2457 of differences from 1.2.41 to 1.4.0)
2459 Version 1.4.0beta93 [November 7, 2009]
2460 Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and
2461 PNG_ALLOCATED macros to detect deprecated direct access to the
2462 png_struct or info_struct members and other deprecated usage in
2463 applications (John Bowler).
2464 Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS,
2465 to prevent warnings about direct access to png structs by libpng
2466 functions while building libpng. They need to be tested, especially
2467 those using compilers other than gcc.
2468 Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG".
2469 They should work but still need to be updated to remove
2470 references to pnggccrd.c or pngvcrd.c and ASM building.
2471 Added README.txt to the beos, cbuilder5, netware, and xcode projects warning
2472 that they need to be updated, to remove references to pnggccrd.c and
2473 pngvcrd.c and to depend on pngpriv.h
2474 Removed three direct references to read_info_ptr members in pngtest.c
2475 that were detected by the new PNG_DEPSTRUCT macro.
2476 Moved the png_debug macro definitions and the png_read_destroy(),
2477 png_write_destroy() and png_far_to_near() prototypes from png.h
2478 to pngpriv.h (John Bowler)
2479 Moved the synopsis lines for png_read_destroy(), png_write_destroy()
2480 png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3.
2482 Version 1.4.0beta94 [November 9, 2009]
2483 Removed the obsolete, unused pnggccrd.c and pngvcrd.c files.
2484 Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
2485 Removed dependency of pngtest.o on pngpriv.h in the makefiles.
2486 Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
2488 Version 1.4.0beta95 [November 10, 2009]
2489 Changed png_check_sig() to !png_sig_cmp() in contrib programs.
2490 Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile
2491 Changed png_check_sig() to !png_sig_cmp() in contrib programs.
2492 Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
2493 Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c
2494 Added dependency on pngpriv.h in contrib/pngminim/*/makefile
2496 Version 1.4.0beta96 [November 12, 2009]
2497 Renamed scripts/makefile.wce to scripts/makefile.cegcc
2498 Revised Makefile.am to use libpng.sys while building libpng.so
2499 so that only PNG_EXPORT functions are exported.
2500 Removed the deprecated png_check_sig() function/macro.
2501 Removed recently removed function names from scripts/*.def
2502 Revised pngtest.png to put chunks in the same order written by pngtest
2503 (evidently the same change made in libpng-1.0beta54 was lost).
2504 Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
2506 Version 1.4.0beta97 [November 13, 2009]
2507 Restored pngtest.png to the libpng-1.4.0beta7 version.
2508 Removed projects/beos and netware.txt; no one seems to be supporting them.
2511 Version 1.4.0beta98 [November 13, 2009]
2512 Added the "xcode" project to zip distributions,
2513 Fixed a typo in scripts/pngwin.def introduced in beta97.
2515 Version 1.4.0beta99 [November 14, 2009]
2516 Moved libpng-config.in and libpng.pc-configure.in out of the scripts
2517 directory, to libpng-config.in and libpng-pc.in, respectively, and
2518 modified Makefile.am and configure.ac accordingly. Now "configure"
2519 needs nothing from the "scripts" directory.
2520 Avoid redefining PNG_CONST in pngconf.h
2522 Version 1.4.0beta100 [November 14, 2009]
2523 Removed ASM builds from projects/visualc6 and projects/visualc71
2524 Removed scripts/makefile.nommx and makefile.vcawin32
2525 Revised CMakeLists.txt to account for new location of libpng-config.in
2527 Updated INSTALL to reflect removal and relocation of files.
2529 Version 1.4.0beta101 [November 14, 2009]
2530 Restored the binary files (*.jpg, *.png, some project files) that were
2531 accidentally deleted from the zip and 7z distributions when the xcode
2534 Version 1.4.0beta102 [November 18, 2009]
2535 Added libpng-config.in and libpng-pc.in to the zip and 7z distributions.
2536 Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100.
2537 Moved descriptions of makefiles and other scripts out of INSTALL into
2539 Updated the copyright year in scripts/pngwin.rc from 2006 to 2009.
2541 Version 1.4.0beta103 [November 21, 2009]
2542 Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt
2543 Align row_buf on 16-byte boundary in memory.
2544 Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call
2545 to png_flush() after png_write_IEND(). See 1.4.0beta32, 1.4.0beta50
2546 changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES. Someone
2548 Make the 'png_jmpbuf' macro expand to a call that records the correct
2549 longjmp function as well as returning a pointer to the setjmp
2550 jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
2553 Version 1.4.0beta104 [November 22, 2009]
2554 Removed png_longjmp_ptr from scripts/*.def and libpng.3
2555 Rebuilt configure scripts with autoconf-2.65
2557 Version 1.4.0beta105 [November 25, 2009]
2558 Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535()
2559 to accomplish alpha premultiplication when
2560 PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined.
2561 Changed "/255" to "/255.0" in background calculations to make it clear
2562 that the 255 is used as a double.
2564 Version 1.4.0beta106 [November 27, 2009]
2565 Removed premultiplied alpha feature.
2567 Version 1.4.0beta107 [December 4, 2009]
2569 Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
2570 Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
2571 Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
2572 to put png.h and pngconf.h in $prefix/include, like the other scripts,
2573 instead of in $prefix/include/libpng. Also revised makefile.sco
2574 to put them in $prefix/include/libpng15 instead of in
2575 $prefix/include/libpng/libpng15.
2577 Version 1.4.0beta108 [December 11, 2009]
2578 Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
2579 Relocated png_do_chop() to its original position in pngrtran.c; the
2580 change in version 1.2.41beta08 caused transparency to be handled wrong
2581 in some 16-bit datastreams (Yusaku Sugai).
2583 Version 1.4.0beta109 [December 13, 2009]
2584 Added "bit_depth" parameter to the private png_build_gamma_table() function.
2585 Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the
2586 PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit
2589 Version 1.4.0rc02 [December 20, 2009]
2590 Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c
2592 Version 1.4.0rc03 [December 22, 2009]
2593 Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
2594 (revising the change in 1.4.0beta99)
2596 Version 1.4.0rc04 [December 25, 2009]
2597 Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED
2598 in pngset.c to be consistent with other changes in version 1.2.38.
2600 Version 1.4.0rc05 [December 25, 2009]
2601 Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and
2602 Makefile.in to be consistent with changes in libpng-1.4.0rc03
2604 Version 1.4.0rc06 [December 29, 2009]
2605 Reverted the gamma_table changes from libpng-1.4.0beta109.
2606 Fixed some indentation errors.
2608 Version 1.4.0rc07 [January 1, 2010]
2609 Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences.
2610 Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c
2611 Update copyright year to 2010.
2613 Version 1.4.0rc08 [January 2, 2010]
2614 Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr
2617 Version 1.4.0 [January 3, 2010]
2620 Version 1.4.1beta01 [January 8, 2010]
2621 Updated CMakeLists.txt for consistent indentation and to avoid an
2622 unclosed if-statement warning (Philip Lowman).
2623 Revised Makefile.am and Makefile.in to remove references to Y2KINFO,
2624 KNOWNBUG, and libpng.la (Robert Schwebel).
2625 Revised the makefiles to install the same files and symbolic
2626 links as configure, except for libpng.la and libpng14.la.
2627 Make png_set|get_compression_buffer_size() available even when
2628 PNG_WRITE_SUPPORTED is not enabled.
2629 Revised Makefile.am and Makefile.in to simplify their maintenance.
2630 Revised scripts/makefile.linux to install a link to libpng14.so.14.1
2632 Version 1.4.1beta02 [January 9, 2010]
2633 Revised the rest of the makefiles to install a link to libpng14.so.14.1
2635 Version 1.4.1beta03 [January 10, 2010]
2636 Removed png_set_premultiply_alpha() from scripts/*.def
2638 Version 1.4.1rc01 [January 16, 2010]
2641 Version 1.4.1beta04 [January 23, 2010]
2642 Revised png_decompress_chunk() to improve speed and memory usage when
2643 decoding large chunks.
2644 Added png_set|get_chunk_malloc_max() functions.
2646 Version 1.4.1beta05 [January 26, 2010]
2647 Relocated "int k" declaration in pngtest.c to minimize its scope.
2649 Version 1.4.1beta06 [January 28, 2010]
2650 Revised png_decompress_chunk() to use a two-pass method suggested by
2653 Version 1.4.1beta07 [February 6, 2010]
2654 Folded some long lines in the source files.
2655 Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,
2656 and a PNG_USER_LIMITS_SUPPORTED flag.
2657 Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as
2658 png_ptr->png_user_chunk_malloc_max.
2659 Revised png_push_save_buffer() to do fewer but larger png_malloc() calls.
2661 Version 1.4.1beta08 [February 6, 2010]
2662 Minor cleanup and updating of dates and copyright year.
2664 Version 1.5.0beta01 [February 7, 2010]
2665 Moved declaration of png_struct into private pngstruct.h and png_info
2668 Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010]
2669 Reverted to original png_push_save_buffer() code.
2671 Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010]
2672 Return allocated "old_buffer" in png_push_save_buffer() before
2673 calling png_error(), to avoid a potential memory leak.
2674 Updated configure script to use SO number 15.
2676 Version 1.5.0beta04 [February 9, 2010]
2677 Removed malformed "incomplete struct declaration" of png_info from png.h
2679 Version 1.5.0beta05 [February 12, 2010]
2680 Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the
2681 linewrapping that it entailed.
2682 Revised comments in pngstruct.h and pnginfo.h and added pointers to
2684 Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES
2685 Removed the cbuilder5 project, which has not been updated to 1.4.0.
2687 Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]
2688 Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke
2691 Version 1.5.0beta07 [omitted]
2693 Version 1.5.0beta08 [February 19, 2010]
2694 Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED
2695 wherever png_snprintf() is used to construct error and warning messages.
2696 Noted in scripts/makefile.mingw that it expects to be run under MSYS.
2697 Removed obsolete unused MMX-querying support from contrib/gregbook
2698 Added exported png_longjmp() function.
2699 Removed the AIX redefinition of jmpbuf in png.h
2700 Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt
2701 when building on AIX.
2703 Version 1.5.0beta09 [February 19, 2010]
2704 Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.
2705 Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h
2707 Version 1.5.0beta10 [February 25, 2010]
2708 Removed unused gzio.c from contrib/pngminim gather and makefile scripts
2709 Removed replacement error handlers from contrib/gregbook. Because of
2710 the new png_longjmp() function they are no longer needed.
2712 Version 1.5.0beta11 [March 6, 2010]
2713 Removed checking for already-included setjmp.h from pngconf.h
2714 Fixed inconsistent indentations and made numerous cosmetic changes.
2715 Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
2717 Version 1.5.0beta12 [March 9, 2010]
2718 Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from
2719 the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES"
2720 and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler).
2721 Created new pngdebug.h and moved debug definitions there.
2723 Version 1.5.0beta13 [March 10, 2010]
2724 Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
2725 Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
2726 PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
2728 Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
2729 Moved the 'config.h' support from pngconf.h to pngpriv.h
2730 Removed PNGAPI from the png_longjmp_ptr typedef.
2731 Eliminated dependence of pngtest.c on the private pngdebug.h file.
2732 Make all png_debug macros into *unterminated* statements or
2733 expressions (i.e. a trailing ';' must always be added) and correct
2734 the format statements in various png_debug messages.
2736 Version 1.5.0beta14 [March 14, 2010]
2737 Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
2738 Revised Makefile.am to account for recent additions and replacements.
2739 Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and
2740 added ordinal numbers to the Windows DEF file and corrected the duplicated
2741 ordinal numbers on CE symbols that are commented out.
2742 Added back in export symbols that can be present in the Windows build but
2743 are disabled by default.
2744 PNG_EXPORT changed to include an 'ordinal' field for DEF file generation.
2745 PNG_CALLBACK added to make callback definitions uniform. PNGAPI split
2746 into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks),
2747 and appropriate changes made to all files. Cygwin builds re-hinged to
2748 allow procedure call standard changes and to remove the need for the DEF
2749 file (fixes build on Cygwin).
2750 Enabled 'attribute' warnings that are relevant to library APIs and callbacks.
2751 Changed rules for generation of the various symbol files and added a new
2752 rule for a DEF file (which is also added to the distribution).
2753 Updated the symbol file generation to stop it adding spurious spaces
2754 to EOL (coming from preprocessor macro expansion). Added a facility
2755 to join tokens in the output and rewrite *.dfn to use this.
2756 Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71
2757 and removed scripts/makefile.cygwin.
2758 Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built.
2759 Removed the include of sys/types.h - apparently unnecessary now on the
2760 platforms on which it happened (all but Mac OS and RISC OS).
2761 Moved the Mac OS test into pngpriv.h (the only place it is used.)
2763 Version 1.5.0beta15 [March 17, 2010]
2764 Added symbols.chk target to Makefile.am to validate the symbols in png.h
2765 against the new DEF file scripts/symbols.def.
2766 Changed the default DEF file back to pngwin.def.
2767 Removed makefile.mingw.
2768 Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
2770 Version 1.5.0beta16 [April 1, 2010]
2771 Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that
2772 fields are initialized in all configurations. The READ/WRITE
2773 macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as
2774 before to disable code to actually read or write iTXt chunks
2775 and iTXt_SUPPORTED can be used to detect presence of either
2776 read or write support (but it is probably better to check for
2777 the one actually required - read or write.)
2778 Combined multiple png_warning() calls for a single error.
2779 Restored the macro definition of png_check_sig().
2781 Version 1.5.0beta17 [April 17, 2010]
2782 Added some "(long)" typecasts to printf calls in png_handle_cHRM().
2783 Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
2784 Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
2785 more accurately what it actually does. At the same time, renamed
2786 the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
2787 PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
2788 Added some "(long)" typecasts to printf calls in png_handle_cHRM().
2789 Freeze build-time only configuration in the build.
2790 In all prior versions of libpng most configuration options
2791 controlled by compiler #defines had to be repeated by the
2792 application code that used libpng. This patch changes this
2793 so that compilation options that can only be changed at build
2794 time are frozen in the build. Options that are compiler
2795 dependent (and those that are system dependent) are evaluated
2796 each time - pngconf.h holds these. Options that can be changed
2797 per-file in the application are in png.h. Frozen options are
2798 in the new installed header file pnglibconf.h (John Bowler)
2799 Removed the xcode project because it has not been updated to work
2801 Removed the ability to include optional pngusr.h
2803 Version 1.5.0beta18 [April 17, 2010]
2804 Restored the ability to include optional pngusr.h
2805 Moved replacements for png_error() and png_warning() from the
2806 contrib/pngminim project to pngerror.c, for use when warnings or
2807 errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
2808 storing unneeded error/warning text.
2809 Updated contrib/pngminim project to work with the new pnglibconf.h
2810 Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
2812 Version 1.5.0beta19 [April 24, 2010]
2813 Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions
2814 to read and write ints to be disabled independently of PNG_USE_READ_MACROS,
2815 which allows libpng to be built with the functions even though the default
2816 is to use the macros - this allows applications to choose at app build
2817 time whether or not to use macros (previously impossible because the
2818 functions weren't in the default build.)
2819 Changed Windows calling convention back to __cdecl for API functions.
2820 For Windows/x86 platforms only:
2821 __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses
2822 __cdecl throughout (both API functions and callbacks) on Windows/x86
2824 Replaced visualc6 and visualc71 projects with new vstudio project
2825 Relaxed the overly-restrictive permissions of some files.
2827 Version 1.5.0beta20 [April 24, 2010]
2828 Relaxed more overly-restrictive permissions of some files.
2830 Version 1.5.0beta21 [April 27, 2010]
2831 Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new
2832 vstudio project files, and some trivial editing of some files in the
2834 Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in
2835 contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
2837 Version 1.5.0beta22 [April 28, 2010]
2838 Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS
2839 because it has a macro equivalent.
2840 Improved the options.awk script; added an "everything off" option.
2841 Revised contrib/pngminim to use the "everything off" option in pngusr.dfa.
2843 Version 1.5.0beta23 [April 29, 2010]
2844 Corrected PNG_REMOVED macro to take five arguments.
2845 The macro was documented with two arguments (name,ordinal), however
2846 the symbol checking .dfn files assumed five arguments. The five
2847 argument form seems more useful so it is changed to that.
2848 Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED
2849 in gregbook/readpng2.c
2850 Corrected protection of png_get_user_transform_ptr. The API declaration in
2851 png.h is removed if both READ and WRITE USER_TRANSFORM are turned off
2852 but was left defined in pngtrans.c
2853 Added logunsupported=1 to cause pnglibconf.h to document disabled options.
2854 This makes the installed pnglibconf.h more readable but causes no
2855 other change. The intention is that users of libpng will find it
2856 easier to understand if an API they need is missing.
2857 Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
2858 Removed dummy_inflate.c from contrib/pngminim/encoder
2859 Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile.
2861 Version 1.5.0beta24 [May 7, 2010]
2862 Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the
2863 offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.
2864 Added more blank lines for readability.
2866 Version 1.5.0beta25 [June 18, 2010]
2867 In pngpread.c: png_push_have_row() add check for new_row > height
2868 Removed the now-redundant check for out-of-bounds new_row from example.c
2870 Version 1.5.0beta26 [June 18, 2010]
2871 In pngpread.c: png_push_process_row() add check for too many rows.
2873 Version 1.5.0beta27 [June 18, 2010]
2874 Removed the check added in beta25 as it is now redundant.
2876 Version 1.5.0beta28 [June 20, 2010]
2877 Rewrote png_process_IDAT_data to consistently treat extra data as warnings
2878 and handle end conditions more cleanly.
2879 Removed the new (beta26) check in png_push_process_row().
2881 Version 1.5.0beta29 [June 21, 2010]
2882 Revised scripts/options.awk to work on Sunos (but still doesn't work)
2883 Added comment to options.awk and contrib/pngminim/*/makefile to try nawk.
2885 Version 1.5.0beta30 [June 22, 2010]
2886 Stop memory leak when reading a malformed sCAL chunk.
2888 Version 1.5.0beta31 [June 26, 2010]
2889 Revised pngpread.c patch of beta28 to avoid an endless loop.
2890 Removed some trailing blanks.
2892 Version 1.5.0beta32 [June 26, 2010]
2893 Removed leftover scripts/options.patch and scripts/options.rej
2895 Version 1.5.0beta33 [July 6, 3010]
2896 Made FIXED and FLOATING options consistent in the APIs they enable and
2897 disable. Corrected scripts/options.awk to handle both command line
2898 options and options specified in the .dfa files.
2899 Changed char *msg to PNG_CONST char *msg in pngrutil.c
2900 Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or
2901 floating point APIs, but not both.
2902 Reversed patch to remove error handler when the jmp_buf is stored in the
2903 main program structure, not the png_struct.
2904 The error handler is needed because the default handler in libpng will
2905 always use the jmp_buf in the library control structure; this is never
2906 set. The gregbook code is a useful example because, even though it
2907 uses setjmp/longjmp, it shows how error handling can be implemented
2908 using control mechanisms not directly supported by libpng. The
2909 technique will work correctly with mechanisms such as Microsoft
2910 Structure Exceptions or C++ exceptions (compiler willing - note that gcc
2911 does not by default support interworking of C and C++ error handling.)
2912 Reverted changes to call png_longjmp in contrib/gregbook where it is not
2913 appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp
2915 Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)
2916 Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')
2918 Version 1.5.0beta34 [July 12, 2010]
2919 Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h
2921 Version 1.5.0beta35 [July 24, 2010]
2922 Removed some newly-added TAB characters.
2923 Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
2924 Moved the definition of png_snprintf() outside of the enclosing
2925 #ifdef blocks in pngconf.h
2927 Version 1.5.0beta36 [July 29, 2010]
2928 Patches by John Bowler:
2929 Fixed point APIs are now supported throughout (no missing APIs).
2930 Internal fixed point arithmetic support exists for all internal floating
2932 sCAL validates the floating point strings it is passed.
2933 Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2
2934 Two new APIs exist to get the number of passes without turning on the
2935 PNG_INTERLACE transform and to get the number of rows in the current
2937 A new test program, pngvalid.c, validates the gamma code.
2938 Errors in the 16 bit gamma correction (overflows) have been corrected.
2939 cHRM chunk testing is done consistently (previously the floating point
2940 API bypassed it, because the test really didn't work on FP, now the test
2941 is performed on the actual values to be stored in the PNG file so it
2942 works in the FP case too.)
2943 Most floating point APIs now simply call the fixed point APIs after
2944 converting the values to the fixed point form used in the PNG file.
2945 The standard headers no longer include zlib.h, which is currently only
2946 required for pngstruct.h and can therefore be internal.
2947 Revised png_get_int_32 to undo the PNG two's complement representation of
2950 Version 1.5.0beta37 [July 30, 2010]
2951 Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid
2953 Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
2955 Version 1.5.0beta38 [July 31, 2010]
2956 Implemented remaining "_fixed" functions.
2957 Corrected a number of recently introduced warnings mostly resulting from
2958 safe but uncast assignments to shorter integers. Also added a zlib
2959 VStudio release library project because the latest zlib Official Windows
2960 build does not include such a thing.
2961 Revised png_get_int_16() to be similar to png_get_int_32().
2962 Restored projects/visualc71.
2964 Version 1.5.0beta39 [August 2, 2010]
2965 VisualC/GCC warning fixes, VisualC build fixes
2966 The changes include support for function attributes in VC in addition to
2967 those already present in GCC - necessary because without these some
2968 warnings are unavoidable. Fixes include signed/unsigned fixes in
2969 pngvalid and checks with gcc -Wall -Wextra -Wunused.
2970 VC requires function attributes on function definitions as well as
2971 declarations, PNG_FUNCTION has been added to enable this and the
2972 relevant function definitions changed.
2974 Version 1.5.0beta40 [August 6, 2010]
2975 Correct use of _WINDOWS_ in pngconf.h
2976 Removed png_mem_ #defines; they are no longer used.
2977 Added the sRGB chunk to pngtest.png
2979 Version 1.5.0beta41 [August 11, 2010]
2980 Added the cHRM chunk to pngtest.png
2981 Don't try to use version-script with cygwin/mingw.
2982 Revised contrib/gregbook to work under cygwin/mingw.
2984 Version 1.5.0beta42 [August 18, 2010]
2985 Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
2986 Made all API functions that have const arguments and constant string
2987 literal pointers declare them (John Bowler).
2989 Version 1.5.0beta43 [August 20, 2010]
2990 Removed spurious tabs, shorten long lines (no source change)
2991 Also added scripts/chkfmt to validate the format of all the files that can
2992 reasonably be validated (it is suggested to run "make distclean" before
2993 checking, because some machine generated files have long lines.)
2994 Reformatted the CHANGES file to be more consistent throughout.
2995 Made changes to address various issues identified by GCC, mostly
2996 signed/unsigned and shortening problems on assignment but also a few
2997 difficult to optimize (for GCC) loops.
2998 Fixed non-GCC fixed point builds. In png.c a declaration was misplaced
2999 in an earlier update. Fixed to declare the auto variables at the head.
3000 Use cexcept.h in pngvalid.c.
3002 Version 1.5.0beta44 [August 24, 2010]
3003 Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
3004 installing libpng in /usr/lib64 (Funda Wang).
3005 Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
3006 Revised CMakeLists.txt to make symlinks instead of copies when installing.
3007 Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)
3008 Implemented memory checks within pngvalid
3009 Reformatted/rearranged pngvalid.c to assist use of progressive reader.
3010 Check interlaced images in pngvalid
3011 Clarified pngusr.h comments in pnglibconf.dfa
3012 Simplified the pngvalid error-handling code now that cexcept.h is in place.
3013 Implemented progressive reader in pngvalid.c for standard tests
3014 Implemented progressive read in pngvalid.c gamma tests
3015 Turn on progressive reader in pngvalid.c by default and tidy code.
3017 Version 1.5.0beta45 [August 26, 2010]
3018 Added an explicit make step to projects/vstudio for pnglibconf.h
3019 Also corrected zlib.vcxproj into which Visual Studio had introduced
3020 what it calls an "authoring error". The change to make pnglibconf.h
3021 simply copies the file; in the future it may actually generate the
3022 file from scripts/pnglibconf.dfa as the other build systems do.
3023 Changed pngvalid to work when floating point APIs are disabled
3024 Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt
3025 Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX
3026 in pngpriv.h in case the user neglected to define them in their pngusr.h
3028 Version 1.5.0beta46 [August 28, 2010]
3029 Added new private header files to libpng_sources in CMakeLists.txt
3030 Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options.
3031 Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project.
3033 Version 1.5.0beta47 [September 11, 2010]
3034 Fixed a number of problems with 64-bit compilation reported by Visual
3035 Studio 2010 (John Bowler).
3037 Version 1.5.0beta48 [October 4, 2010]
3038 Updated CMakeLists.txt (Philip Lowman).
3039 Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
3040 $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
3041 Fixed problem with symbols creation in Makefile.am which was assuming that
3042 all versions of ccp write to standard output by default (Martin Banky). The
3043 bug was introduced in libpng-1.2.9beta5.
3044 Removed unused mkinstalldirs.
3046 Version 1.5.0beta49 [October 8, 2010]
3047 Undid Makefile.am revision of 1.5.0beta48.
3049 Version 1.5.0beta50 [October 14, 2010]
3050 Revised Makefile.in to account for mkinstalldirs being removed.
3051 Added some "(unsigned long)" typecasts in printf statements in pngvalid.c.
3052 Suppressed a compiler warning in png_handle_sPLT().
3053 Check for out-of-range text compression mode in png_set_text().
3055 Version 1.5.0beta51 [October 15, 2010]
3056 Changed embedded dates to "(PENDING RELEASE) in beta releases (and future
3057 rc releases) to minimize the difference between releases.
3059 Version 1.5.0beta52 [October 16, 2010]
3060 Restored some of the embedded dates (in png.h, png.c, documentation, etc.)
3062 Version 1.5.0beta53 [October 18, 2010]
3063 Updated INSTALL to mention using "make maintainer-clean" and to remove
3064 obsolete statement about a custom ltmain.sh
3065 Disabled "color-tests" by default in Makefile.am so it will work with
3066 automake versions earlier than 1.11.1
3067 Use document name "libpng-manual.txt" instead of "libpng-<version>.txt"
3068 to simplify version differences.
3069 Removed obsolete remarks about setjmp handling from INSTALL.
3070 Revised and renamed the typedef in png.h and png.c that was designed
3071 to catch library and header mismatch.
3073 Version 1.5.0beta54 [November 10, 2010]
3074 Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.
3075 Used a consistent structure for the pngget.c functions.
3077 Version 1.5.0beta55 [November 21, 2010]
3078 Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
3079 Moved reading of file signature into png_read_sig (Cosmin)
3080 Fixed atomicity of chunk header serialization (Cosmin)
3081 Added test for io_state in pngtest.c (Cosmin)
3082 Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.
3083 Changes to remove gcc warnings (John Bowler)
3084 Certain optional gcc warning flags resulted in warnings in libpng code.
3085 With these changes only -Wconversion and -Wcast-qual cannot be turned on.
3086 Changes are trivial rearrangements of code. -Wconversion is not possible
3087 for pngrutil.c (because of the widespread use of += et al on variables
3088 smaller than (int) or (unsigned int)) and -Wcast-qual is not possible
3089 with pngwio.c and pngwutil.c because the 'write' callback and zlib
3090 compression both fail to declare their input buffers with 'const'.
3092 Version 1.5.0beta56 [December 7, 2010]
3093 Added the private PNG_UNUSED() macro definition in pngpriv.h.
3094 Added some commentary about PNG_EXPORT in png.h and pngconf.h
3095 Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the
3096 objective of simplifying and improving the cosmetic appearance of png.h.
3097 Fixed some incorrect "=" macro names in pnglibconf.dfa
3098 Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt
3100 Version 1.5.0beta57 [December 9, 2010]
3101 Documented the pngvalid gamma error summary with additional comments and
3103 Improved missing symbol handling in checksym.awk; symbols missing in both
3104 the old and new files can now be optionally ignored, treated as errors
3106 Removed references to pngvcrd.c and pnggccrd.c from the vstudio project.
3107 Updated "libpng14" to "libpng15" in the visualc71 project.
3108 Enabled the strip16 tests in pngvalid.`
3109 Don't display test results (except PASS/FAIL) when running "make test".
3110 Instead put them in pngtest-log.txt
3111 Added "--with-zprefix=<string>" to configure.ac
3112 Updated the prebuilt configuration files to autoconf version 2.68
3114 Version 1.5.0beta58 [December 19, 2010]
3115 Fixed interlace image handling and add test cases (John Bowler)
3116 Fixed the clean rule in Makefile.am to remove pngtest-log.txt
3117 Made minor changes to work around warnings in gcc 3.4
3119 Version 1.5.0rc01 [December 27, 2010]
3122 Version 1.5.0rc02 [December 27, 2010]
3123 Eliminated references to the scripts/*.def files in project/visualc71.
3125 Version 1.5.0rc03 [December 28, 2010]
3126 Eliminated scripts/*.def and revised Makefile.am accordingly
3128 Version 1.5.0rc04 [December 29, 2010]
3129 Fixed bug in background transformation handling in pngrtran.c (it was
3130 looking for the flag in png_ptr->transformations instead of in
3131 png_ptr->flags) (David Raymond).
3133 Version 1.5.0rc05 [December 31, 2010]
3134 Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin)
3136 Version 1.5.0rc06 [January 4, 2011]
3137 Changed the new configure option "zprefix=string" to "zlib-prefix=string"
3139 Version 1.5.0rc07 [January 4, 2011]
3140 Updated copyright year.
3142 Version 1.5.0 [January 6, 2011]
3145 version 1.5.1beta01 [January 8, 2011]
3146 Added description of png_set_crc_action() to the manual.
3147 Added a note in the manual that the type of the iCCP profile was changed
3148 from png_charpp to png_bytepp in png_get_iCCP(). This change happened
3149 in version 1.5.0beta36 but is not noted in the CHANGES. Similarly,
3150 it was changed from png_charpp to png_const_bytepp in png_set_iCCP().
3151 Ensure that png_rgb_to_gray ignores palette mapped images, if libpng
3152 internally happens to call it with one.
3153 Fixed a failure to handle palette mapped images correctly.
3155 Version 1.5.1beta02 [January 14, 2011]
3156 Fixed a bug in handling of interlaced images (bero at arklinux.org).
3157 Updated CMakeLists.txt (Clifford Yapp)
3159 Version 1.5.1beta03 [January 14, 2011]
3160 Fixed typecasting of some png_debug() statements (Cosmin)
3162 Version 1.5.1beta04 [January 16, 2011]
3163 Updated documentation of png_set|get_tRNS() (Thomas Klausner).
3164 Mentioned in the documentation that applications must #include "zlib.h"
3165 if they need access to anything in zlib.h, and that a number of
3166 macros such as png_memset() are no longer accessible by applications.
3167 Corrected pngvalid gamma test "sample" function to access all of the color
3168 samples of each pixel, instead of sampling the red channel three times.
3169 Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow"
3170 warnings, and (mistakenly) changed png_exp() to exp().
3172 Version 1.5.1beta05 [January 16, 2011]
3173 Changed variable names png_index, png_div, png_exp, and png_gamma to
3174 char_index, divisor, exp_b10, and gamma_val, respectively, and
3175 changed exp() back to png_exp().
3177 Version 1.5.1beta06 [January 20, 2011]
3178 Prevent png_push_crc_skip() from hanging while reading an unknown chunk
3179 or an over-large compressed zTXt chunk with the progressive reader.
3180 Eliminated more GCC "shadow" warnings.
3181 Revised png_fixed() in png.c to avoid compiler warning about reaching the
3182 end without returning anything.
3184 Version 1.5.1beta07 [January 22, 2011]
3185 In the manual, describe the png_get_IHDR() arguments in the correct order.
3186 Added const_png_structp and const_png_infop types, and used them in
3187 prototypes for most png_get_*() functions.
3189 Version 1.5.1beta08 [January 23, 2011]
3190 Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name()
3191 Added synopses for the IO_STATE functions and other missing synopses
3192 to the manual. Removed the synopses from libpngpf.3 because they
3193 were out of date and no longer useful. Better information can be
3194 obtained by reading the prototypes and comments in pngpriv.h
3195 Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build
3196 Added a make macro DFNCPP that is a CPP that will accept the tokens in
3197 a .dfn file and adds configure stuff to test for such a CPP. ./configure
3198 should fail if one is not available.
3199 Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace.
3200 Added png_get_current_row_number and png_get_current_pass_number for the
3201 benefit of the user transform callback.
3202 Added png_process_data_pause and png_process_data_skip for the benefit of
3203 progressive readers that need to stop data processing or want to optimize
3204 skipping of unread data (e.g., if the reader marks a chunk to be skipped.)
3206 Version 1.5.1beta09 [January 24, 2011]
3207 Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error.
3208 pngvalid contains tests of transforms, which tests are currently disabled
3209 because they are incompletely tested. gray_to_rgb was failing to expand
3210 the bit depth for smaller bit depth images; this seems to be a long
3211 standing error and resulted, apparently, in invalid output. The
3212 documentation did not accurately describe what libpng really does when
3213 converting RGB to gray.
3215 Version 1.5.1beta10 [January 27, 2010]
3216 Fixed incorrect examples of callback prototypes in the manual, that were
3217 introduced in libpng-1.0.0.
3218 In addition the order of the png_get_uint macros with respect to the
3219 relevant function definitions has been reversed. This helps the
3220 preprocessing of the symbol files be more robust. Furthermore, the
3221 symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when
3222 the library may actually be built with PNG_USE_READ_MACROS; this stops
3223 the read macros interfering with the symbol file format.
3224 Made the manual, synopses, and function prototypes use the function
3225 argument names file_gamma, int_file_gamma, and srgb_intent consistently.
3227 Version 1.5.1beta11 [January 28, 2011]
3228 Changed PNG_UNUSED from "param=param;" to "{if(param){}}".
3229 Corrected local variable type in new API png_process_data_skip()
3230 The type was self-evidently incorrect but only causes problems on 64 bit
3232 Added transform tests to pngvalid and simplified the arguments.
3234 Version 1.5.1rc01 [January 29, 2011]
3237 Version 1.5.1rc02 [January 31, 2011]
3238 Added a request in the manual that applications do not use "png_" or
3239 "PNG_" to begin any of their own symbols.
3240 Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h
3242 Version 1.5.1 [February 3, 2011]
3245 Version 1.5.2beta01 [February 13, 2011]
3246 More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
3247 check formal parameters names in function declarations (as well as
3248 definitions) to see if they match a name in the global namespace.
3249 Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
3250 old VisualC++ preprocessor.
3251 Turned on interlace handling in png_read_png().
3252 Fixed gcc pendantic warnings.
3253 Handle longjmp in Cygwin.
3254 Fixed png_get_current_row_number() in the interlaced case.
3255 Cleaned up ALPHA flags and transformations.
3256 Implemented expansion to 16 bits.
3258 Version 1.5.2beta02 [February 19, 2011]
3259 Fixed mistake in the descriptions of user read_transform and write_transform
3260 function prototypes in the manual. The row_info struct is png_row_infop.
3261 Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior.
3262 Corrected png_get_current_row_number documentation
3263 Fixed the read/write row callback documentation.
3264 This documents the current behavior, where the callback is called after
3265 every row with information pertaining to the next row.
3267 Version 1.5.2beta03 [March 3, 2011]
3268 Fixed scripts/makefile.vcwin32
3269 Updated contrib/pngsuite/README to add the word "modify".
3270 Define PNG_ALLOCATED to blank when _MSC_VER<1300.
3272 Version 1.5.2rc01 [March 19, 2011]
3273 Define remaining attributes to blank when MSC_VER<1300.
3274 ifdef out mask arrays in pngread.c when interlacing is not supported.
3276 Version 1.5.2rc02 [March 22, 2011]
3277 Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
3278 and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
3280 Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
3281 to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
3283 Version 1.5.2rc03 [March 24, 2011]
3284 Don't include standard header files in png.h while building the symbol table,
3285 to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
3287 Version 1.5.2 [March 31, 2011]
3289 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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3293 or to glennrp at users.sourceforge.net