1
CHANGES - changes for libpng
3
version 0.1 [March 29, 1995]
4
initial work-in-progress release
6
version 0.2 [April 1, 1995]
7
added reader into png.h
8
fixed small problems in stub file
10
version 0.3 [April 8, 1995]
12
split up pngwrite.c to several files
15
cleaned up writer, adding a few new transformations
16
fixed some bugs in writer
17
interfaced with zlib 0.5
19
added check for 64 KB blocks for 16 bit machines
21
version 0.4 [April 26, 1995]
22
cleaned up code and commented code
23
simplified time handling into png_time
24
created png_color_16 and png_color_8 to handle color needs
25
cleaned up color type defines
27
made various names more consistent
28
interfaced with zlib 0.71
29
cleaned up zTXt reader and writer (using zlib's Reset functions)
30
split transformations into pngrtran.c and pngwtran.c
32
version 0.5 [April 30, 1995]
33
interfaced with zlib 0.8
34
fixed many reading and writing bugs
35
saved using 3 spaces instead of tabs
37
version 0.6 [May 1, 1995]
39
added png_large_malloc() and png_large_free()
41
cleaned up some compiler warnings
42
added png_start_read_image()
44
version 0.7 [June 24, 1995]
45
cleaned up lots of bugs
46
finished dithering and other stuff
48
changed name from pnglib to libpng
50
version 0.71 [June 26, 1995]
51
changed pngtest.png for zlib 0.93
52
fixed error in libpng.txt and example.c
54
version 0.8 [August 20, 1995]
56
added png_set_filler()
57
split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
58
added #define's to remove unwanted code
59
moved png_info_init() to png.c
60
added old_size into png_realloc()
61
added functions to manually set filtering and compression info
62
changed compression parameters based on image type
63
optimized filter selection code
65
changed external functions passing floats to doubles (k&r problems?)
66
put all the configurable stuff in pngconf.h
67
enabled png_set_shift to work with paletted images on read
68
added png_read_update_info() - updates info structure with transformations
70
Version 0.81 [August, 1995]
71
incorporated Tim Wegner's medium model code (thanks, Tim)
73
Version 0.82 [September, 1995]
76
Version 0.85 [December, 1995]
77
added more medium model code (almost everything's a far)
78
added i/o, error, and memory callback functions
79
fixed some bugs (16-bit, 4-bit interlaced, etc.)
80
added first run progressive reader (barely tested)
82
Version 0.86 [January, 1996]
84
improved documentation
86
Version 0.87 [January, 1996]
87
fixed medium model bugs
88
fixed other bugs introduced in 0.85 and 0.86
89
added some minor documentation
91
Version 0.88 [January, 1996]
92
fixed progressive bugs
93
replaced tabs with spaces
94
cleaned up documentation
95
added callbacks for read/write and warning/error functions
97
Version 0.89 [June 5, 1996]
98
Added new initialization API to make libpng work better with shared libs
99
we now have png_create_read_struct(), png_create_write_struct(),
100
png_create_info_struct(), png_destroy_read_struct(), and
101
png_destroy_write_struct() instead of the separate calls to
102
malloc and png_read_init(), png_info_init(), and png_write_init()
103
Changed warning/error callback functions to fix bug - this means you
104
should use the new initialization API if you were using the old
105
png_set_message_fn() calls, and that the old API no longer exists
106
so that people are aware that they need to change their code
107
Changed filter selection API to allow selection of multiple filters
108
since it didn't work in previous versions of libpng anyways
109
Optimized filter selection code
110
Fixed png_set_background() to allow using an arbitrary RGB color for
112
Fixed gamma and background correction for paletted images, so
113
png_correct_palette is not needed unless you are correcting an
114
external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
115
in pngconf.h) - if nobody uses this, it may disappear in the future.
116
Fixed bug with Borland 64K memory allocation (Alexander Lehmann)
117
Fixed bug in interlace handling (Smarasderagd, I think)
118
Added more error checking for writing and image to reduce invalid files
119
Separated read and write functions so that they won't both be linked
120
into a binary when only reading or writing functionality is used
121
New pngtest image also has interlacing and zTXt
122
Updated documentation to reflect new API
124
Version 0.89c [June 17, 1996]
127
Version 0.90 [January, 1997]
128
Made CRC errors/warnings on critical and ancillary chunks configurable
129
libpng will use the zlib CRC routines by (compile-time) default
130
Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
131
Added external C++ wrapper statements to png.h (Gilles Dauphin)
132
Allow PNG file to be read when some or all of file signature has already
133
been read from the beginning of the stream. ****This affects the size
134
of info_struct and invalidates all programs that use a shared libpng****
135
Fixed png_filler() declarations
136
Fixed? background color conversions
137
Fixed order of error function pointers to match documentation
138
Current chunk name is now available in png_struct to reduce the number
139
of nearly identical error messages (will simplify multi-lingual
140
support when available)
141
Try to get ready for unknown-chunk callback functions:
142
- previously read critical chunks are flagged, so the chunk handling
143
routines can determine if the chunk is in the right place
144
- all chunk handling routines have the same prototypes, so we will
145
be able to handle all chunks via a callback mechanism
146
Try to fix Linux "setjmp" buffer size problems
147
Removed png_large_malloc, png_large_free, and png_realloc functions.
149
Version 0.95 [March, 1997]
150
Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
151
Fixed bug in PNG file signature compares when start != 0
152
Changed parameter type of png_set_filler(...filler...) from png_byte
154
Added test for MACOS to ensure that both math.h and fp.h are not #included
155
Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
156
Added "packswap" transformation, which changes the endianness of
157
packed-pixel bytes (Kevin Bracey)
158
Added "strip_alpha" transformation, which removes the alpha channel of
159
input images without using it (not necessarily a good idea)
160
Added "swap_alpha" transformation, which puts the alpha channel in front
161
of the color bytes instead of after
162
Removed all implicit variable tests which assume NULL == 0 (I think)
163
Changed several variables to "png_size_t" to show 16/32-bit limitations
164
Added new pCAL chunk read/write support
165
Added experimental filter selection weighting (Greg Roelofs)
166
Removed old png_set_rgbx() and png_set_xrgb() functions that have been
167
obsolete for about 2 years now (use png_set_filler() instead)
168
Added macros to read 16- and 32-bit ints directly from buffer, to be
169
used only on those systems that support it (namely PowerPC and 680x0)
170
With some testing, this may become the default for MACOS/PPC systems.
171
Only calculate CRC on data if we are going to use it
172
Added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
173
Added macros for simple libpng debugging output selectable at compile time
174
Removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
175
More description of info_struct in libpng.txt and png.h
176
More instructions in example.c
177
More chunk types tested in pngtest.c
178
Renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
179
png_set_<chunk>. We now have corresponding png_get_<chunk>
180
functions in pngget.c to get information in info_ptr. This isolates
181
the application from the internal organization of png_info_struct
182
(good for shared library implementations).
184
Version 0.96 [May, 1997]
185
Fixed serious bug with < 8bpp images introduced in 0.95
186
Fixed 256-color transparency bug (Greg Roelofs)
187
Fixed up documentation (Greg Roelofs, Laszlo Nyul)
188
Fixed "error" in pngconf.h for Linux setjmp() behavior
189
Fixed DOS medium model support (Tim Wegner)
190
Fixed png_check_keyword() for case with error in static string text
191
Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
192
Added typecasts to quiet compiler errors
193
Added more debugging info
195
Version 0.97 [January, 1998]
196
Removed PNG_USE_OWN_CRC capability
197
Relocated png_set_crc_action from pngrutil.c to pngrtran.c
198
Fixed typecasts of "new_key", etc. (Andreas Dilger)
199
Added RFC 1152 [sic] date support
200
Fixed bug in gamma handling of 4-bit grayscale
201
Added 2-bit grayscale gamma handling (Glenn R-P)
202
Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
203
Minor corrections in libpng.txt
204
Added simple sRGB support (Glenn R-P)
205
Easier conditional compiling, e.g.,
206
define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
207
all configurable options can be selected from command line instead
208
of having to edit pngconf.h (Glenn R-P)
209
Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
210
Added more conditions for png_do_background, to avoid changing
211
black pixels to background when a background is supplied and
212
no pixels are transparent
213
Repaired PNG_NO_STDIO behavior
214
Tested NODIV support and made it default behavior (Greg Roelofs)
215
Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
216
Regularized version numbering scheme and bumped shared-library major
217
version number to 2 to avoid problems with libpng 0.89 apps
220
Version 0.98 [January, 1998]
221
Cleaned up some typos in libpng.txt and in code documentation
222
Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
223
Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
224
Changed recommendation about file_gamma for PC images to .51 from .45,
225
in example.c and libpng.txt, added comments to distinguish between
226
screen_gamma, viewing_gamma, and display_gamma.
227
Changed all references to RFC1152 to read RFC1123 and changed the
228
PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
229
Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
230
Changed srgb_intent from png_byte to int to avoid compiler bugs
232
Version 0.99 [January 30, 1998]
233
Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
234
Fixed a longstanding "packswap" bug in pngtrans.c
235
Fixed some inconsistencies in pngconf.h that prevented compiling with
236
PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
237
Fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
238
Changed recommendation about file_gamma for PC images to .50 from .51 in
239
example.c and libpng.txt, and changed file_gamma for sRGB images to .45
240
Added a number of functions to access information from the png structure
241
png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
242
Added TARGET_MACOS similar to zlib-1.0.8
243
Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
244
Added type casting to all png_malloc() function calls
246
Version 0.99a [January 31, 1998]
247
Added type casts and parentheses to all returns that return a value.(Tim W.)
249
Version 0.99b [February 4, 1998]
250
Added type cast png_uint_32 on malloc function calls where needed.
251
Changed type of num_hist from png_uint_32 to int (same as num_palette).
252
Added checks for rowbytes overflow, in case png_size_t is less than 32 bits.
253
Renamed makefile.elf to makefile.lnx.
255
Version 0.99c [February 7, 1998]
256
More type casting. Removed erroneous overflow test in pngmem.c.
257
Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.
258
Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5.
260
Version 0.99d [February 11, 1998]
261
Renamed "far_to_near()" "png_far_to_near()"
263
Version 99c "buffered" operations didn't work as intended. Replaced them
264
with png_memcpy_check() and png_memset_check().
265
Added many "if (png_ptr == NULL) return" to quell compiler warnings about
266
unused png_ptr, mostly in pngget.c and pngset.c.
267
Check for overlength tRNS chunk present when indexed-color PLTE is read.
268
Cleaned up spelling errors in libpng.3/libpng.txt
269
Corrected a problem with png_get_tRNS() which returned undefined trans array
271
Version 0.99e [February 28, 1998]
272
Corrected png_get_tRNS() again.
273
Add parentheses for easier reading of pngget.c, fixed "||" should be "&&".
274
Touched up example.c to make more of it compileable, although the entire
275
file still can't be compiled (Willem van Schaik)
276
Fixed a bug in png_do_shift() (Bryan Tsai)
277
Added a space in png.h prototype for png_write_chunk_start()
278
Replaced pngtest.png with one created with zlib 1.1.1
279
Changed pngtest to report PASS even when file size is different (Jean-loup G.)
280
Corrected some logic errors in png_do_invert_alpha() (Chris Patterson)
282
Version 0.99f [March 5, 1998]
283
Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey)
284
Moved makefiles into a "scripts" directory, and added INSTALL instruction file
285
Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok)
286
Added pointers to "note on libpng versions" in makefile.lnx and README
287
Added row callback feature when reading and writing nonprogressive rows
288
and added a test of this feature in pngtest.c
289
Added user transform callbacks, with test of the feature in pngtest.c
291
Version 0.99g [March 6, 1998, morning]
292
Minor changes to pngtest.c to suppress compiler warnings.
293
Removed "beta" language from documentation.
295
Version 0.99h [March 6, 1998, evening]
296
Minor changes to previous minor changes to pngtest.c
297
Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED
298
and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro
299
Added user transform capability
301
Version 1.00 [March 7, 1998]
302
Changed several typedefs in pngrutil.c
303
Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)
304
Replaced "while(1)" with "for(;;)"
305
Added PNGARG() to prototypes in pngtest.c and removed some prototypes
306
Updated some of the makefiles (Tom Lane)
307
Changed some typedefs (s_start, etc.) in pngrutil.c
308
Fixed dimensions of "short_months" array in pngwrite.c
309
Replaced ansi2knr.c with the one from jpeg-v6
311
Version 1.0.0 [March 8, 1998]
312
Changed name from 1.00 to 1.0.0 (Adam Costello)
313
Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)
315
Version 1.0.0a [March 9, 1998]
316
Fixed three bugs in pngrtran.c to make gamma+background handling consistent
318
Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz
319
for major, minor, and bugfix releases. This is 10001. (Adam Costello,
321
Make months range from 1-12 in png_convert_to_rfc1123
323
Version 1.0.0b [March 13, 1998]
324
Quieted compiler complaints about two empty "for" loops in pngrutil.c
325
Minor changes to makefile.s2x
326
Removed #ifdef/#endif around a png_free() in pngread.c
328
Version 1.0.1 [March 14, 1998]
329
Changed makefile.s2x to reduce security risk of using a relative pathname
330
Fixed some typos in the documentation (Greg).
331
Fixed a problem with value of "channels" returned by png_read_update_info()
333
Version 1.0.1a [April 21, 1998]
334
Optimized Paeth calculations by replacing abs() function calls with intrinsics
335
plus other loop optimizations. Improves avg decoding speed by about 20%.
336
Commented out i386istic "align" compiler flags in makefile.lnx.
337
Reduced the default warning level in some makefiles, to make them consistent.
338
Removed references to IJG and JPEG in the ansi2knr.c copyright statement.
339
Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.
340
Added grayscale and 16-bit capability to png_do_read_filler().
341
Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes
342
too large when writing an image with bit_depth < 8 (Bob Dellaca).
343
Corrected some bugs in the experimental weighted filtering heuristics.
344
Moved a misplaced pngrutil code block that truncates tRNS if it has more
345
than num_palette entries -- test was done before num_palette was defined.
346
Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
347
Changed compiler flags in makefile.wat for better optimization
350
Version 1.0.1b [May 2, 1998]
351
Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
352
Relocated the png_composite macros from pngrtran.c to png.h (Greg).
353
Added makefile.sco (contributed by Mike Hopkirk).
354
Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
355
Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
356
More work on the Paeth-filtering, achieving imperceptible speedup
358
More work on loop optimization which may help when compiled with C++
360
Added warnings when people try to use transforms they've defined out.
361
Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
362
Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
364
Version 1.0.1c [May 11, 1998]
365
Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
366
filler bytes should have been 0xff instead of 0xf.
367
Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
368
Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
369
out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
370
Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,
371
for consistency, in pngconf.h
372
Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier
373
to remove unwanted capabilities via the compile line
374
Made some corrections to grammar (which, it's) in documentation (Greg).
375
Corrected example.c, use of row_pointers in png_write_image().
377
Version 1.0.1d [May 24, 1998]
378
Corrected several statements that used side effects illegally in pngrutil.c
379
and pngtrans.c, that were introduced in version 1.0.1b
380
Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
381
More corrections to example.c, use of row_pointers in png_write_image()
383
Added pngdll.mak and pngdef.pas to scripts directory, contributed by
384
Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
385
Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
386
Changed several loops from count-down to count-up, for consistency.
388
Version 1.0.1e [June 6, 1998]
389
Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
390
added warnings when people try to set png_read_fn and png_write_fn in
392
Added a test such that png_do_gamma will be done when num_trans==0
393
for truecolor images that have defined a background. This corrects an
394
error that was introduced in libpng-0.90 that can cause gamma processing
396
Added tests in png.h to include "trans" and "trans_values" in structures
397
when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined.
398
Add png_free(png_ptr->time_buffer) in png_destroy_read_struct()
399
Moved png_convert_to_rfc_1123() from pngwrite.c to png.c
400
Added capability for user-provided malloc_fn() and free_fn() functions,
401
and revised pngtest.c to demonstrate their use, replacing the
402
PNGTEST_DEBUG_MEM feature.
403
Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
405
Version 1.0.2 [June 14, 1998]
406
Fixed two bugs in makefile.bor .
408
Version 1.0.2a [December 30, 1998]
409
Replaced and extended code that was removed from png_set_filler() in 1.0.1a.
410
Fixed a bug in png_do_filler() that made it fail to write filler bytes in
411
the left-most pixel of each row (Kevin Bracey).
412
Changed "static pngcharp tIME_string" to "static char tIME_string[30]"
413
in pngtest.c (Duncan Simpson).
414
Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk
415
even when no tIME chunk was present in the source file.
416
Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit.
417
Fixed a problem in png_read_push_finish_row(), which would not skip some
418
passes that it should skip, for images that are less than 3 pixels high.
419
Interchanged the order of calls to png_do_swap() and png_do_shift()
420
in pngwtran.c (John Cromer).
421
Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h .
422
Changed "bad adaptive filter type" from error to warning in pngrutil.c .
423
Fixed a documentation error about default filtering with 8-bit indexed-color.
424
Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO
426
Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.
427
Added png_get_copyright() and png_get_header_version() functions.
428
Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c
429
Added information about debugging in libpng.txt and libpng.3 .
430
Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and
432
Removed lines after Dynamic Dependencies" in makefile.aco .
433
Revised makefile.dec to make a shared library (Jeremie Petit).
434
Removed trailing blanks from all files.
436
Version 1.0.2a [January 6, 1999]
437
Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h
438
Added "if" tests to silence complaints about unused png_ptr in png.h and png.c
439
Changed "check_if_png" function in example.c to return true (nonzero) if PNG.
440
Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()
443
Version 1.0.3 [January 14, 1999]
444
Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)
445
Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.
447
Version 1.0.3a [August 12, 1999]
448
Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
449
if an attempt is made to read an interlaced image when it's not supported.
450
Added check if png_ptr->trans is defined before freeing it in pngread.c
451
Modified the Y2K statement to include versions back to version 0.71
452
Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c
453
Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)
454
Replaced leading blanks with tab characters in makefile.hux
455
Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.
456
Changed (float)red and (float)green to (double)red, (double)green
457
in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.
458
Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).
459
Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).
460
Updated documentation to refer to the PNG-1.2 specification.
461
Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c
462
in makefile.knr, INSTALL, and README (L. Peter Deutsch)
463
Fixed bugs in calculation of the length of rowbytes when adding alpha
464
channels to 16-bit images, in pngrtran.c (Chris Nokleberg)
465
Added function png_set_user_transform_info() to store user_transform_ptr,
466
user_depth, and user_channels into the png_struct, and a function
467
png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)
468
Added function png_set_empty_plte_permitted() to make libpng useable
470
Corrected the typedef for png_free_ptr in png.h (Jesse Jones).
471
Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
472
consistent with PNG-1.2, and allow variance of 500 before complaining.
473
Added assembler code contributed by Intel in file pngvcrd.c and modified
474
makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation,
476
Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
477
Added some aliases for png_set_expand() in pngrtran.c, namely
478
png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
479
(Greg Roelofs, in "PNG: The Definitive Guide").
480
Added makefile.beo for BEOS on X86, contributed by Sander Stok.
482
Version 1.0.3b [August 26, 1999]
483
Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
484
Changed leading blanks to tabs in all makefiles.
485
Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
486
Made alternate versions of png_set_expand() in pngrtran.c, namely
487
png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
488
(Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases.
489
Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
490
Revised calculation of num_blocks in pngmem.c to avoid a potentially
491
negative shift distance, whose results are undefined in the C language.
492
Added a check in pngset.c to prevent writing multiple tIME chunks.
493
Added a check in pngwrite.c to detect invalid small window_bits sizes.
495
Version 1.0.3d [September 4, 1999]
496
Fixed type casting of igamma in pngrutil.c
497
Added new png_expand functions to scripts/pngdef.pas and pngos2.def
498
Added a demo read_user_transform_fn that examines the row filters in pngtest.c
500
Version 1.0.4 [September 24, 1999, not distributed publicly]
501
Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
502
Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
503
Made several minor corrections to pngtest.c
504
Renamed the makefiles with longer but more user friendly extensions.
505
Copied the PNG copyright and license to a separate LICENSE file.
506
Revised documentation, png.h, and example.c to remove reference to
507
"viewing_gamma" which no longer appears in the PNG specification.
508
Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
509
Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
510
Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
511
assembler code) and makefile.vcwin32 (doesn't).
512
Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
513
Added a copy of pngnow.png to the distribution.
515
Version 1.0.4a [September 25, 1999]
516
Increase max_pixel_depth in pngrutil.c if a user transform needs it.
517
Changed several division operations to right-shifts in pngvcrd.c
519
Version 1.0.4b [September 30, 1999]
520
Added parentheses in line 3732 of pngvcrd.c
521
Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
523
Version 1.0.4c [October 1, 1999]
524
Added a "png_check_version" function in png.c and pngtest.c that will generate
525
a helpful compiler error if an old png.h is found in the search path.
526
Changed type of png_user_transform_depth|channels from int to png_byte.
527
Added "Libpng is OSI Certified Open Source Software" statement to png.h
529
Version 1.0.4d [October 6, 1999]
530
Changed 0.45 to 0.45455 in png_set_sRGB()
531
Removed unused PLTE entries from pngnow.png
532
Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.
534
Version 1.0.4e [October 10, 1999]
535
Fixed sign error in pngvcrd.c (Greg Roelofs)
536
Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)
538
Version 1.0.4f [October 15, 1999]
539
Surrounded example.c code with #if 0 .. #endif to prevent people from
540
inadvertently trying to compile it.
541
Changed png_get_header_version() from a function to a macro in png.h
542
Added type casting mostly in pngrtran.c and pngwtran.c
543
Removed some pointless "ptr = NULL" in pngmem.c
544
Added a "contrib" directory containing the source code from Greg's book.
546
Version 1.0.5 [October 15, 1999]
547
Minor editing of the INSTALL and README files.
549
Version 1.0.5a [October 23, 1999]
550
Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
551
Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
552
Further optimization and bugfix of pngvcrd.c
553
Revised pngset.c so that it does not allocate or free memory in the user's
554
text_ptr structure. Instead, it makes its own copy.
555
Created separate write_end_info_struct in pngtest.c for a more severe test.
556
Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
558
Version 1.0.5b [November 23, 1999]
559
Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and
560
PNG_FLAG_WROTE_tIME from flags to mode.
561
Added png_write_info_before_PLTE() function.
562
Fixed some typecasting in contrib/gregbook/*.c
563
Updated scripts/makevms.com and added makevms.com to contrib/gregbook
564
and contrib/pngminus (Martin Zinser)
566
Version 1.0.5c [November 26, 1999]
567
Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr.
568
Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
569
accommodate making DLL's: Moved usr_png_ver from global variable to function
570
png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and
571
eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays
572
into pngtypes.h. Eliminated use of global png_pass arrays. Declared the
573
png_CHNK and png_pass arrays to be "const". Made the global arrays
574
available to applications (although none are used in libpng itself) when
575
PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined.
576
Removed some extraneous "-I" from contrib/pngminus/makefile.std
577
Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.
578
Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3
580
Version 1.0.5d [November 29, 1999]
581
Add type cast (png_const_charp) two places in png.c
582
Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
583
Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
584
to applications a macro "PNG_USE_LOCAL_ARRAYS".
585
comment out (with #ifdef) all the new declarations when
586
PNG_USE_GLOBAL_ARRAYS is defined.
587
Added PNG_EXPORT_VAR macro to accommodate making DLL's.
589
Version 1.0.5e [November 30, 1999]
590
Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
591
structure; refactored the inflate/deflate support to make adding new chunks
592
with trailing compressed parts easier in the future, and added new functions
593
png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP,
594
png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond).
595
NOTE: Applications that write text chunks MUST define png_text->lang
596
before calling png_set_text(). It must be set to NULL if you want to
597
write tEXt or zTXt chunks. If you want your application to be able to
598
run with older versions of libpng, use
600
#ifdef PNG_iTXt_SUPPORTED
601
png_text[i].lang = NULL;
604
Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned
605
offsets (Eric S. Raymond).
606
Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into
607
PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED
608
macros, leaving the separate macros also available.
609
Removed comments on #endifs at the end of many short, non-nested #if-blocks.
611
Version 1.0.5f [December 6, 1999]
612
Changed makefile.solaris to issue a warning about potential problems when
613
the ucb "ld" is in the path ahead of the ccs "ld".
614
Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.
615
Added sCAL chunk support (Eric S. Raymond).
617
Version 1.0.5g [December 7, 1999]
618
Fixed "png_free_spallettes" typo in png.h
619
Added code to handle new chunks in pngpread.c
620
Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block
621
Added "translated_key" to png_text structure and png_write_iTXt().
622
Added code in pngwrite.c to work around a newly discovered zlib bug.
624
Version 1.0.5h [December 10, 1999]
625
NOTE: regarding the note for version 1.0.5e, the following must also
626
be included in your code:
627
png_text[i].translated_key = NULL;
628
Unknown chunk handling is now supported.
629
Option to eliminate all floating point support was added. Some new
630
fixed-point functions such as png_set_gAMA_fixed() were added.
631
Expanded tabs and removed trailing blanks in source files.
633
Version 1.0.5i [December 13, 1999]
634
Added some type casts to silence compiler warnings.
635
Renamed "png_free_spalette" to "png_free_spalettes" for consistency.
636
Removed leading blanks from a #define in pngvcrd.c
637
Added some parameters to the new png_set_keep_unknown_chunks() function.
638
Added a test for up->location != 0 in the first instance of writing
639
unknown chunks in pngwrite.c
640
Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to
642
Added png_free_hIST() function.
643
Various patches to fix bugs in the sCAL and integer cHRM processing,
644
and to add some convenience macros for use with sCAL.
646
Version 1.0.5j [December 21, 1999]
647
Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
648
around buggy compilers.
649
Added new type "png_fixed_point" for integers that hold float*100000 values
650
Restored backward compatibility of tEXt/zTXt chunk processing:
651
Restored the first four members of png_text to the same order as v.1.0.5d.
652
Added members "lang_key" and "itxt_length" to png_text struct. Set
653
text_length=0 when "text" contains iTXt data. Use the "compression"
654
member to distinguish among tEXt/zTXt/iTXt types. Added
655
PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.
656
The "Note" above, about backward incompatibility of libpng-1.0.5e, no
658
Fixed png_read|write_iTXt() to read|write parameters in the right order,
659
and to write the iTXt chunk after IDAT if it appears in the end_ptr.
660
Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
661
Reversed the order of trying to write floating-point and fixed-point gAMA.
663
Version 1.0.5k [December 27, 1999]
664
Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
665
Added png_handle_as_unknown() function (Glenn)
666
Added png_free_chunk_list() function and chunk_list and num_chunk_list members
668
Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.
669
Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings
670
about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)
671
Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
672
Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
673
Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
675
Version 1.0.5l [January 1, 2000]
676
Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
677
for setting a callback function to handle unknown chunks and for
678
retrieving the associated user pointer (Glenn).
680
Version 1.0.5m [January 7, 2000]
681
Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
683
Version 1.0.5n [January 9, 2000]
684
Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
685
own memory for info_ptr->palette. This makes it safe for the calling
686
application to free its copy of the palette any time after it calls
689
Version 1.0.5o [January 20, 2000]
690
Cosmetic changes only (removed some trailing blanks and TABs)
692
Version 1.0.5p [January 31, 2000]
693
Renamed pngdll.mak to makefile.bd32
694
Cosmetic changes in pngtest.c
696
Version 1.0.5q [February 5, 2000]
697
Relocated the makefile.solaris warning about PATH problems.
698
Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
699
Revised makefile.gcmmx
700
Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
702
Version 1.0.5r [February 7, 2000]
703
Removed superfluous prototype for png_get_itxt from png.h
704
Fixed a bug in pngrtran.c that improperly expanded the background color.
705
Return *num_text=0 from png_get_text() when appropriate, and fix documentation
706
of png_get_text() in libpng.txt/libpng.3.
708
Version 1.0.5s [February 18, 2000]
709
Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
710
new error handler that's planned for the next libpng release, and changed
711
example.c, pngtest.c, and contrib programs to use this macro.
712
Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
713
Fixed a bug in png_read_png() that caused it to fail to expand some images
714
that it should have expanded.
715
Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
717
Changed the allocation of palette, history, and trans arrays back to
718
the version 1.0.5 method (linking instead of copying) which restores
719
backward compatibility with version 1.0.5. Added some remarks about
720
that in example.c. Added "free_me" member to info_ptr and png_ptr
721
and added png_free_data() function.
722
Updated makefile.linux and makefile.gccmmx to make directories conditionally.
723
Made cosmetic changes to pngasmrd.h
724
Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
725
Modified png_read_png() to allocate info_ptr->row_pointers only if it
726
hasn't already been allocated.
728
Version 1.0.5t [March 4, 2000]
729
Changed png_jmp_env() migration aiding macro to png_jmpbuf().
730
Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c
731
Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when
732
PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b
733
Files in contrib/gregbook were revised to use png_jmpbuf() and to select
734
a 24-bit visual if one is available, and to allow abbreviated options.
735
Files in contrib/pngminus were revised to use the png_jmpbuf() macro.
736
Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s
738
Version 1.0.5u [March 5, 2000]
739
Simplified the code that detects old png.h in png.c and pngtest.c
740
Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)
741
Increased precision of rgb_to_gray calculations from 8 to 15 bits and
742
added png_set_rgb_to_gray_fixed() function.
743
Added makefile.bc32 (32-bit Borland C++, C mode)
745
Version 1.0.5v [March 11, 2000]
746
Added some parentheses to the png_jmpbuf macro definition.
747
Updated references to the zlib home page, which has moved to freesoftware.com.
748
Corrected bugs in documentation regarding png_read_row() and png_write_row().
749
Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt.
750
Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
751
revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
753
Version 1.0.6 [March 20, 2000]
754
Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c
755
Added makefile.sggcc (SGI IRIX with gcc)
757
Version 1.0.6d [April 7, 2000]
758
Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
759
Added data_length parameter to png_decompress_chunk() function
760
Revised documentation to remove reference to abandoned png_free_chnk functions
761
Fixed an error in png_rgb_to_gray_fixed()
762
Revised example.c, usage of png_destroy_write_struct().
763
Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
764
Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c
765
Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
767
Version 1.0.6e [April 9, 2000]
768
Added png_data_freer() function.
769
In the code that checks for over-length tRNS chunks, added check of
770
info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
771
Minor revisions of libpng.txt/libpng.3.
772
Check for existing data and free it if the free_me flag is set, in png_set_*()
774
Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED
776
Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c
777
and mentioned the purposes of the two macros in libpng.txt/libpng.3.
779
Version 1.0.6f [April 14, 2000]
780
Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.
781
Add checks in png_set_text() for NULL members of the input text structure.
782
Revised libpng.txt/libpng.3.
783
Removed superfluous prototype for png_set_iTXt from png.h
784
Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
785
Changed several png_errors about malformed ancillary chunks to png_warnings.
787
Version 1.0.6g [April 24, 2000]
788
Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
789
Relocated paragraph about png_set_background() in libpng.3/libpng.txt
790
and other revisions (Matthias Benckmann)
791
Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
792
png_ptr members to restore binary compatibility with libpng-1.0.5
793
(breaks compatibility with libpng-1.0.6).
795
Version 1.0.6h [April 24, 2000]
796
Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds
797
libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)
798
This is a temporary change for test purposes.
800
Version 1.0.6i [May 2, 2000]
801
Rearranged some members at the end of png_info and png_struct, to put
802
unknown_chunks_num and free_me within the original size of the png_structs
803
and free_me, png_read_user_fn, and png_free_fn within the original png_info,
804
because some old applications allocate the structs directly instead of
805
using png_create_*().
806
Added documentation of user memory functions in libpng.txt/libpng.3
807
Modified png_read_png so that it will use user_allocated row_pointers
808
if present, unless free_me directs that it be freed, and added description
809
of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.
810
Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version
811
1.00) members of png_struct and png_info, to regain binary compatibility
812
when you define this macro. Capabilities lost in this event
813
are user transforms (new in version 1.0.0),the user transform pointer
814
(new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,
815
the high-level interface, and unknown chunks support (all new in 1.0.6).
816
This was necessary because of old applications that allocate the structs
817
directly as authors were instructed to do in libpng-0.88 and earlier,
818
instead of using png_create_*().
819
Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which
820
can be used to detect codes that directly allocate the structs, and
821
code to check these modes in png_read_init() and png_write_init() and
822
generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED
824
Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
826
Version 1.0.6j [May 3, 2000]
827
Overloaded png_read_init() and png_write_init() with macros that convert
828
calls to png_read_init_2() or png_write_init_2() that check the version
831
Version 1.0.7beta11 [May 7, 2000]
832
Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
833
which are no longer used.
834
Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
835
defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXt_SUPPORTED
837
Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory
838
overrun when old applications fill the info_ptr->text structure directly.
839
Added PNGAPI macro, and added it to the definitions of all exported functions.
840
Relocated version macro definitions ahead of the includes of zlib.h and
843
Version 1.0.7beta12 [May 12, 2000]
844
Revised pngset.c to avoid a problem with expanding the png_debug macro.
845
Deleted some extraneous defines from pngconf.h
846
Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
847
Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
848
Added png_access_version_number() function.
849
Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
850
Expanded libpng.3/libpng.txt information about png_data_freer().
852
Version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
853
Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
854
warnings instead of errors, as pngrutil.c does.
855
Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
856
will actually write IDATs.
857
Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
858
Make png_free_data() ignore its final parameter except when freeing data
859
that can have multiple instances (text, sPLT, unknowns).
860
Fixed a new bug in png_set_rows().
861
Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
862
Added png_set_invalid() function.
863
Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
865
Version 1.0.7beta15 [May 30, 2000]
866
Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
867
fewer error messages.
868
Rearranged checks for Z_OK to check the most likely path first in pngpread.c
870
Added checks in pngtest.c for png_create_*() returning NULL, and mentioned
871
in libpng.txt/libpng.3 the need for applications to check this.
872
Changed names of png_default_*() functions in pngtest to pngtest_*().
873
Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32.
874
Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c
875
Set each pointer to NULL after freeing it in png_free_data().
876
Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
877
macro that conflicts with libpng's png_color_16.index. (Dimitri
879
Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).
881
Version 1.0.7beta16 [June 4, 2000]
882
Revised the workaround of AIX string.h "index" bug.
883
Added a check for overlength PLTE chunk in pngrutil.c.
884
Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
885
indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
886
Added a warning in png_decompress_chunk() when it runs out of data, e.g.
887
when it tries to read an erroneous PhotoShop iCCP chunk.
888
Added PNG_USE_DLL macro.
889
Revised the copyright/disclaimer/license notice.
890
Added contrib/msvctest directory
892
Version 1.0.7rc1 [June 9, 2000]
893
Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
894
Added contrib/visupng directory (Willem van Schaik)
896
Version 1.0.7beta18 [June 23, 2000]
897
Revised PNGAPI definition, and pngvcrd.c to work with __GCC__
898
and do not redefine PNGAPI if it is passed in via a compiler directive.
899
Revised visupng/PngFile.c to remove returns from within the Try block.
900
Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
901
Updated contrib/visupng/cexcept.h to version 1.0.0.
902
Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
904
Version 1.0.7rc2 [June 28, 2000]
905
Updated license to include disclaimers required by UCITA.
906
Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.
908
Version 1.0.7 [July 1, 2000]
909
Revised the definition of "trans_values" in libpng.3/libpng.txt
911
Version 1.0.8beta1 [July 8, 2000]
912
Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.
913
Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and
915
Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h.
916
Removed unused "#include <assert.h>" from png.c
917
Added WindowsCE support.
918
Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment.
920
Version 1.0.8beta2 [July 10, 2000]
921
Added project files to the wince directory and made further revisions
922
of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE.
924
Version 1.0.8beta3 [July 11, 2000]
925
Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS()
926
for indexed-color input files to avoid potential double-freeing trans array
927
under some unusual conditions; problem was introduced in version 1.0.6f.
928
Further revisions to pngtest.c and files in the wince subdirectory.
930
Version 1.0.8beta4 [July 14, 2000]
931
Added the files pngbar.png and pngbar.jpg to the distribution.
932
Added makefile.cygwin, and cygwin support in pngconf.h
933
Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory)
935
Version 1.0.8rc1 [July 16, 2000]
936
Revised png_debug() macros and statements to eliminate compiler warnings.
938
Version 1.0.8 [July 24, 2000]
939
Added png_flush() in pngwrite.c, after png_write_IEND().
940
Updated makefile.hpux to build a shared library.
942
Version 1.0.9beta1 [November 10, 2000]
943
Fixed typo in scripts/makefile.hpux
944
Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
945
Fixed sequence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
946
Changed "cdrom.com" in documentation to "libpng.org"
947
Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).
948
Changed type of "params" from voidp to png_voidp in png_read|write_png().
949
Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h.
950
Revised the 3 instances of WRITEFILE in pngtest.c.
951
Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory.
952
Updated png.rc in dll/msvc project
953
Revised makefile.dec to define and use LIBPATH and INCPATH
954
Increased size of global png_libpng_ver[] array from 12 to 18 chars.
955
Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const.
956
Removed duplicate png_crc_finish() from png_handle_bKGD() function.
957
Added a warning when application calls png_read_update_info() multiple times.
958
Revised makefile.cygwin
959
Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.
960
Replaced png_set_empty_plte_permitted() with png_permit_mng_features().
962
Version 1.0.9beta2 [November 19, 2000]
963
Renamed the "dll" subdirectory "projects".
964
Added borland project files to "projects" subdirectory.
965
Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.
966
Add error message in png_set_compression_buffer_size() when malloc fails.
968
Version 1.0.9beta3 [November 23, 2000]
969
Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
970
Removed the png_flush() in pngwrite.c that crashes some applications
971
that don't set png_output_flush_fn.
972
Added makefile.macosx and makefile.aix to scripts directory.
974
Version 1.0.9beta4 [December 1, 2000]
975
Change png_chunk_warning to png_warning in png_check_keyword().
976
Increased the first part of msg buffer from 16 to 18 in png_chunk_error().
978
Version 1.0.9beta5 [December 15, 2000]
979
Added support for filter method 64 (for PNG datastreams embedded in MNG).
981
Version 1.0.9beta6 [December 18, 2000]
982
Revised png_set_filter() to accept filter method 64 when appropriate.
983
Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to
984
help prevent applications from using MNG features in PNG datastreams.
985
Added png_permit_mng_features() function.
986
Revised libpng.3/libpng.txt. Changed "filter type" to "filter method".
988
Version 1.0.9rc1 [December 23, 2000]
989
Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c
990
Fixed error handling of unknown compression type in png_decompress_chunk().
991
In pngconf.h, define __cdecl when _MSC_VER is defined.
993
Version 1.0.9beta7 [December 28, 2000]
994
Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.
995
Revised memory management in png_set_hIST and png_handle_hIST in a backward
996
compatible manner. PLTE and tRNS were revised similarly.
997
Revised the iCCP chunk reader to ignore trailing garbage.
999
Version 1.0.9beta8 [January 12, 2001]
1000
Moved pngasmrd.h into pngconf.h.
1001
Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
1003
Version 1.0.9beta9 [January 15, 2001]
1004
Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
1005
wince and msvc project module definition files.
1006
Minor revision of makefile.cygwin.
1007
Fixed bug with progressive reading of narrow interlaced images in pngpread.c
1009
Version 1.0.9beta10 [January 16, 2001]
1010
Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.
1011
Fixed "png_mmx_supported" typo in project definition files.
1013
Version 1.0.9beta11 [January 19, 2001]
1014
Updated makefile.sgi to make shared library.
1015
Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED
1016
by default, for the benefit of DLL forward compatibility. These will
1017
be re-enabled in version 1.2.0.
1019
Version 1.0.9rc2 [January 22, 2001]
1020
Revised cygwin support.
1022
Version 1.0.9 [January 31, 2001]
1023
Added check of cygwin's ALL_STATIC in pngconf.h
1024
Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.
1026
Version 1.0.10beta1 [March 14, 2001]
1027
Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc.
1028
Reformatted libpng.3 to eliminate bad line breaks.
1029
Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c
1030
Added prototype for png_mmx_support() near the top of pnggccrd.c
1031
Moved some error checking from png_handle_IHDR to png_set_IHDR.
1032
Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros.
1033
Revised png_mmx_support() function in pnggccrd.c
1034
Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c
1035
Fixed memory leak in contrib/visupng/PngFile.c
1036
Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version)
1037
Added warnings when retrieving or setting gamma=0.
1038
Increased the first part of msg buffer from 16 to 18 in png_chunk_warning().
1040
Version 1.0.10rc1 [March 23, 2001]
1041
Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy,
1043
Revised png_mmx_supported() function in pnggccrd.c to return proper value.
1044
Fixed bug in progressive reading (pngpread.c) with small images (height < 8).
1046
Version 1.0.10 [March 30, 2001]
1047
Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin
1048
Added beos project files (Chris Herborth)
1050
Version 1.0.11beta1 [April 3, 2001]
1051
Added type casts on several png_malloc() calls (Dimitri Papadapoulos).
1052
Removed a no-longer needed AIX work-around from pngconf.h
1053
Changed several "//" single-line comments to C-style in pnggccrd.c
1055
Version 1.0.11beta2 [April 11, 2001]
1056
Removed PNGAPI from several functions whose prototypes did not have PNGAPI.
1057
Updated scripts/pngos2.def
1059
Version 1.0.11beta3 [April 14, 2001]
1060
Added checking the results of many instances of png_malloc() for NULL
1062
Version 1.0.11beta4 [April 20, 2001]
1063
Undid the changes from version 1.0.11beta3. Added a check for NULL return
1064
from user's malloc_fn().
1065
Removed some useless type casts of the NULL pointer.
1066
Added makefile.netbsd
1068
Version 1.0.11 [April 27, 2001]
1069
Revised makefile.netbsd
1071
Version 1.0.12beta1 [May 14, 2001]
1072
Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot)
1073
Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h
1074
Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings.
1075
Eliminated the png_error about apps using png_read|write_init(). Instead,
1076
libpng will reallocate the png_struct and info_struct if they are too small.
1077
This retains future binary compatibility for old applications written for
1078
libpng-0.88 and earlier.
1080
Version 1.2.0beta1 [May 6, 2001]
1082
Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED
1084
Added runtime selection of MMX features.
1085
Added png_set_strip_error_numbers function and related macros.
1087
Version 1.2.0beta2 [May 7, 2001]
1088
Finished merging 1.2.0beta1 with version 1.0.11
1089
Added a check for attempts to read or write PLTE in grayscale PNG datastreams.
1091
Version 1.2.0beta3 [May 17, 2001]
1092
Enabled user memory function by default.
1093
Modified png_create_struct so it passes user mem_ptr to user memory allocator.
1094
Increased png_mng_features flag from png_byte to png_uint_32.
1095
Bumped shared-library (so-number) and dll-number to 3.
1097
Version 1.2.0beta4 [June 23, 2001]
1098
Check for missing profile length field in iCCP chunk and free chunk_data
1099
in case of truncated iCCP chunk.
1100
Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc
1101
Bumped dll-number from 2 to 3 in makefile.cygwin
1102
Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly
1103
if user attempts to run it on an 8-bit display.
1104
Updated contrib/gregbook
1105
Use png_malloc instead of png_zalloc to allocate palette in pngset.c
1106
Updated makefile.ibmc
1107
Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes
1108
of png_write_oFFS width and height from png_uint_32 to png_int_32.
1110
Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c
1112
Version 1.2.0beta5 [August 8, 2001]
1113
Revised contrib/gregbook
1114
Revised makefile.gcmmx
1115
Revised pnggccrd.c to conditionally compile some thread-unsafe code only
1116
when PNG_THREAD_UNSAFE_OK is defined.
1117
Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with
1118
value exceeding 2^bit_depth-1
1119
Revised makefile.sgi and makefile.sggcc
1120
Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c
1121
Removed restriction that do_invert_mono only operate on 1-bit opaque files
1123
Version 1.2.0 [September 1, 2001]
1124
Changed a png_warning() to png_debug() in pnggccrd.c
1125
Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC().
1127
Version 1.2.1beta1 [October 19, 2001]
1128
Revised makefile.std in contrib/pngminus
1129
Include background_1 in png_struct regardless of gamma support.
1130
Revised makefile.netbsd and makefile.macosx, added makefile.darwin.
1131
Revised example.c to provide more details about using row_callback().
1133
Version 1.2.1beta2 [October 25, 2001]
1134
Added type cast to each NULL appearing in a function call, except for
1138
Version 1.2.1beta3 [October 27, 2001]
1139
Removed type casts from all NULLs.
1140
Simplified png_create_struct_2().
1142
Version 1.2.1beta4 [November 7, 2001]
1143
Revised png_create_info_struct() and png_creat_struct_2().
1144
Added error message if png_write_info() was omitted.
1145
Type cast NULLs appearing in function calls when _NO_PROTO or
1146
PNG_TYPECAST_NULL is defined.
1148
Version 1.2.1rc1 [November 24, 2001]
1149
Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL
1151
Changed typecast of "size" argument to png_size_t in pngmem.c calls to
1152
the user malloc_fn, to agree with the prototype in png.h
1153
Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev)
1154
Updated makefile.sgi to recognize LIBPATH and INCPATH.
1155
Updated various makefiles so "make clean" does not remove previous major
1156
version of the shared library.
1158
Version 1.2.1rc2 [December 4, 2001]
1159
Always allocate 256-entry internal palette, hist, and trans arrays, to
1160
avoid out-of-bounds memory reference caused by invalid PNG datastreams.
1161
Added a check for prefix_length > data_length in iCCP chunk handler.
1163
Version 1.2.1 [December 7, 2001]
1166
Version 1.2.2beta1 [February 22, 2002]
1167
Fixed a bug with reading the length of iCCP profiles (Larry Reeves).
1168
Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate
1169
libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h
1170
Revised makefile.darwin to remove "-undefined suppress" option.
1171
Added checks for gamma and chromaticity values over 21474.83, which exceed
1172
the limit for PNG unsigned 32-bit integers when encoded.
1173
Revised calls to png_create_read_struct() and png_create_write_struct()
1174
for simpler debugging.
1175
Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK)
1177
Version 1.2.2beta2 [February 23, 2002]
1178
Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths.
1179
Check for invalid image dimensions in png_get_IHDR.
1180
Added missing "fi;" in the install target of the SGI makefiles.
1181
Added install-static to all makefiles that make shared libraries.
1182
Always do gamma compensation when image is partially transparent.
1184
Version 1.2.2beta3 [March 7, 2002]
1185
Compute background.gray and background_1.gray even when color_type is RGB
1186
in case image gets reduced to gray later.
1187
Modified shared-library makefiles to install pkgconfig/libpngNN.pc.
1188
Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown
1189
Removed unused png_write_destroy_info prototype from png.h
1190
Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case
1191
Added install-shared target to all makefiles that make shared libraries.
1192
Stopped a double free of palette, hist, and trans when not using free_me.
1193
Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64.
1195
Version 1.2.2beta4 [March 8, 2002]
1196
Compute background.gray and background_1.gray even when color_type is RGB
1197
in case image gets reduced to gray later (Jason Summers).
1198
Relocated a misplaced /bin/rm in the "install-shared" makefile targets
1199
Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library.
1201
Version 1.2.2beta5 [March 26, 2002]
1202
Added missing PNGAPI to several function definitions.
1203
Check for invalid bit_depth or color_type in png_get_IHDR(), and
1204
check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen).
1205
Revised iTXt support to accept NULL for lang and lang_key.
1206
Compute gamma for color components of background even when color_type is gray.
1207
Changed "()" to "{}" in scripts/libpng.pc.in.1208
Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN
1209
Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so
1211
Version 1.2.2beta6 [March 31, 2002]
1213
Version 1.0.13beta1 [March 31, 2002]
1214
Prevent png_zalloc() from trying to memset memory that it failed to acquire.
1215
Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate).
1216
Ensure that the right function (user or default) is used to free the
1217
png_struct after an error in png_create_read_struct_2().
1219
Version 1.2.2rc1 [April 7, 2002]
1221
Version 1.0.13rc1 [April 7, 2002]
1222
Save the ebx register in pnggccrd.c (Sami Farin)
1223
Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner).
1224
Updated makefiles to put headers in include/libpng and remove old include/*.h.
1226
Version 1.2.2 [April 15, 2002]
1228
Version 1.0.13 [April 15, 2002]
1229
Revised description of png_set_filter() in libpng.3/libpng.txt.
1230
Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd
1232
Version 1.0.13patch01 [April 17, 2002]
1234
Version 1.2.2patch01 [April 17, 2002]
1235
Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and1237
Fixed VER -> PNGVER typo in makefile.macosx and added install-static to
1239
Added install: target to makefile.32sunu and makefile.64sunu
1241
Version 1.0.13patch03 [April 18, 2002]
1243
Version 1.2.2patch03 [April 18, 2002]
1244
Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng
1245
subdirectory to libpngNN subdirectory without the full pathname.
1246
Moved generation of libpng.pc from "install" to "all" in 15 makefiles.
1248
Version 1.2.3rc1 [April 28, 2002]
1249
Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos).
1250
Added $(DESTDIR) feature to 24 makefiles (Tim Mooney)
1251
Fixed bug with $prefix, should be $(prefix) in makefile.hpux.
1252
Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin
1253
Added a link from libpngNN.pc to libpng.pc in 15 makefiles.
1254
Added links from include/libpngNN/*.h to include/*.h in 24 makefiles.
1255
Revised makefile.darwin to make relative links without full pathname.
1256
Added setjmp() at the end of png_create_*_struct_2() in case user forgets
1257
to put one in their application.
1258
Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and
1259
removed them from module definition files.
1261
Version 1.2.3rc2 [May 1, 2002]
1262
Fixed bug in reporting number of channels in pngget.c and pngset.c,
1263
that was introduced in version 1.2.2beta5.
1264
Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(),
1265
png_default_flush(), and png_push_fill_buffer() and included them in
1266
module definition files.
1267
Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles.
1269
Version 1.2.3rc3 [May 1, 2002]
1270
Revised prototype for png_default_flush()
1271
Remove old libpng.pc and libpngNN.pc before installing new ones.
1273
Version 1.2.3rc4 [May 2, 2002]
1274
Typos in *.def files (png_default_read|write -> png_default_read|write_data)
1275
In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc
1276
Added libpng-config and libpngNN-config and modified makefiles to install
1278
Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles
1279
Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp
1281
Version 1.2.3rc5 [May 11, 2002]
1282
Changed "error" and "message" in prototypes to "error_message" and
1283
"warning_message" to avoid namespace conflict.
1284
Revised 15 makefiles to build libpng-config from libpng-config-*.in
1285
Once more restored png_zalloc and png_zfree to regular nonexported form.
1286
Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer
1287
to nonexported form, but with PNGAPI, and removed them from module def
1290
Version 1.2.3rc6 [May 14, 2002]
1291
Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c
1292
Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp.
1293
Removed leftover libpng-config "sed" script from four makefiles.
1294
Revised libpng-config creating script in 16 makefiles.
1296
Version 1.2.3 [May 22, 2002]
1297
Revised libpng-config target in makefile.cygwin.
1298
Removed description of png_set_mem_fn() from documentation.
1299
Revised makefile.freebsd.
1300
Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR).
1301
Revised projects/msvc/README.txt
1302
Changed -lpng to -lpngNN in LDFLAGS in several makefiles.
1304
Version 1.2.4beta1 [May 24, 2002]
1305
Added libpng.pc and libpng-config to "all:" target in 16 makefiles.
1306
Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH)
1307
Added missing "\" before closing double quote in makefile.gcmmx.
1308
Plugged various memory leaks; added png_malloc_warn() and png_set_text_2()
1311
Version 1.2.4beta2 [June 25, 2002]
1312
Plugged memory leak of png_ptr->current_text (Matt Holgate).
1313
Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison)
1314
Added -soname to the loader flags in makefile.dec, makefile.sgi, and
1316
Added "test-installed" target to makefile.linux, makefile.gcmmx,
1317
makefile.sgi, and makefile.sggcc.
1319
Version 1.2.4beta3 [June 28, 2002]
1320
Plugged memory leak of row_buf in pngtest.c when there is a png_error().
1321
Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.
1322
Added "test-installed" target to makefile.32sunu, makefile.64sunu,
1323
makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,
1324
makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.
1326
Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
1327
Added "test-installed" target to makefile.cygwin and makefile.sco.
1328
Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro.
1330
Version 1.2.4 and 1.0.14 [July 8, 2002]
1331
Changed png_warning() to png_error() when width is too large to process.
1333
Version 1.2.4patch01 [July 20, 2002]
1334
Revised makefile.cygwin to use DLL number 12 instead of 13.
1336
Version 1.2.5beta1 [August 6, 2002]
1337
Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
1338
Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
1339
Removed some stray *.o files from contrib/gregbook.
1340
Changed png_error() to png_warning() about "Too much data" in pngpread.c
1341
and about "Extra compressed data" in pngrutil.c.
1342
Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
1343
Updated makefile.hpgcc
1344
Updated png.c and pnggccrd.c handling of return from png_mmx_support()
1346
Version 1.2.5beta2 [August 15, 2002]
1347
Only issue png_warning() about "Too much data" in pngpread.c when avail_in
1349
Updated makefiles to install a separate libpng.so.3 with its own rpath.
1351
Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
1352
Revised makefiles to not remove previous minor versions of shared libraries.
1354
Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
1355
Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
1356
library loader directive.
1357
Added missing "$OBJSDLL" line to makefile.gcmmx.
1358
Added missing "; fi" to makefile.32sunu.
1360
Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
1361
Revised libpng-config script.
1363
Version 1.2.5 and 1.0.15 [October 3, 2002]
1364
Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,
1366
Relocated two misplaced PNGAPI lines in pngtest.c
1368
Version 1.2.6beta1 [October 22, 2002]
1369
Commented out warning about uninitialized mmx_support in pnggccrd.c.
1370
Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.
1371
Relocated two more misplaced PNGAPI lines in pngtest.c
1372
Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams,
1373
introduced in version 1.0.2.
1374
Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu.
1376
Version 1.2.6beta2 [November 1, 2002]
1377
Added libpng-config "--ldopts" output.
1378
Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)"
1381
Version 1.2.6beta3 [July 18, 2004]
1382
Reverted makefile changes from version 1.2.6beta2 and some of the changes
1383
from version 1.2.6beta1; these will be postponed until version 1.2.7.
1384
Version 1.2.6 is going to be a simple bugfix release.
1385
Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile.
1386
Fixed potential overrun in pngerror.c by using strncpy instead of memcpy.
1387
Added "#!/bin/sh" at the top of configure, for recognition of the
1388
'x' flag under Cygwin (Cosmin).
1389
Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin).
1390
Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin).
1391
Fixed the special memory handler for Borland C under DOS, in pngmem.c
1393
Removed some spurious assignments in pngrutil.c (Cosmin).
1394
Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings
1395
on 16-bit platforms (Cosmin).
1396
Enclosed shift op expressions in parentheses, to silence warnings (Cosmin).
1397
Used proper type png_fixed_point, to avoid problems on 16-bit platforms,
1398
in png_handle_sRGB() (Cosmin).
1399
Added compression_type to png_struct, and optimized the window size
1400
inside the deflate stream (Cosmin).
1401
Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin).
1402
Fixed handling of unknown chunks that come after IDAT (Cosmin).
1403
Allowed png_error() and png_warning() to work even if png_ptr == NULL
1405
Replaced row_info->rowbytes with row_bytes in png_write_find_filter()
1407
Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre).
1408
Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded
1409
values in png.c (Simon-Pierre, Cosmin).
1410
Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre).
1411
Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc
1413
Moved the definition of PNG_HEADER_VERSION_STRING near the definitions
1414
of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin).
1415
Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin).
1416
Updated scripts/makefile.vc(a)win32 (Cosmin).
1417
Updated the MSVC project (Simon-Pierre, Cosmin).
1418
Updated the Borland C++ Builder project (Cosmin).
1419
Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin).
1420
Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin).
1421
Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin).
1422
Added extra guard around inclusion of Turbo C memory headers, in pngconf.h
1424
Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to
1425
projects/cbuilder5/ (Cosmin).
1426
Moved projects/visualc6/png32ms.def to scripts/pngw32.def,
1427
and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin).
1428
Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin).
1429
Changed line endings to DOS style in cbuilder5 and visualc6 files, even
1430
in the tar.* distributions (Cosmin).
1431
Updated contrib/visupng/VisualPng.dsp (Cosmin).
1432
Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin).
1433
Added a separate distribution with "configure" and supporting files (Junichi).
1435
Version 1.2.6beta4 [July 28, 2004]
1436
Added user ability to change png_size_t via a PNG_SIZE_T macro.
1437
Added png_sizeof() and png_convert_size() functions.
1438
Added PNG_SIZE_MAX (maximum value of a png_size_t variable.
1439
Added check in png_malloc_default() for (size_t)size != (png_uint_32)size
1440
which would indicate an overflow.
1441
Changed sPLT failure action from png_error to png_warning and abandon chunk.
1442
Changed sCAL and iCCP failures from png_error to png_warning and abandon.
1443
Added png_get_uint_31(png_ptr, buf) function.
1444
Added PNG_UINT_32_MAX macro.
1445
Renamed PNG_MAX_UINT to PNG_UINT_31_MAX.
1446
Made png_zalloc() issue a png_warning and return NULL on potential
1448
Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x
1449
Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4.
1450
Revised Borland portion of png_malloc() to return NULL or issue
1451
png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK.
1452
Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove
1453
sequential read support.
1454
Added some "#if PNG_WRITE_SUPPORTED" blocks.
1455
Added #ifdef to remove some redundancy in png_malloc_default().
1456
Use png_malloc instead of png_zalloc to allocate the palette.
1458
Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
1459
Fixed buffer overflow vulnerability (CVE-2004-0597) in png_handle_tRNS().
1460
Fixed NULL dereference vulnerability (CVE-2004-0598) in png_handle_iCCP().
1461
Fixed integer overflow vulnerability (CVE-2004-0599) in png_read_png().
1462
Fixed some harmless bugs in png_handle_sBIT, etc, that would cause
1463
duplicate chunk types to go undetected.
1464
Fixed some timestamps in the -config version
1465
Rearranged order of processing of color types in png_handle_tRNS().
1466
Added ROWBYTES macro to calculate rowbytes without integer overflow.
1467
Updated makefile.darwin and removed makefile.macosx from scripts directory.
1468
Imposed default one million column, one-million row limits on the image
1469
dimensions, and added png_set_user_limits() function to override them.
1470
Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro.
1471
Fixed wrong cast of returns from png_get_user_width|height_max().
1472
Changed some "keep the compiler happy" from empty statements to returns,
1473
Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution
1475
Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004]
1476
Revised makefile.darwin and makefile.solaris. Removed makefile.macosx.
1477
Revised pngtest's png_debug_malloc() to use png_malloc() instead of
1478
png_malloc_default() which is not supposed to be exported.
1479
Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in
1480
pngpread.c. Bug was introduced in 1.2.6rc1.
1481
Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1.
1482
Fixed old bug in RGB to Gray transformation.
1483
Fixed problem with 64-bit compilers by casting arguments to abs()
1485
Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9).
1486
Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin)
1487
Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles.
1488
Added code to update the row_info->colortype in png_do_read_filler() (MSB).
1490
Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004]
1491
Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid
1492
trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro.
1493
Revised documentation of png_set_keep_unknown_chunks().
1494
Check handle_as_unknown status in pngpread.c, as in pngread.c previously.
1495
Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h
1496
Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c
1498
Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004]
1499
Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of
1500
"pinfo" was out of place).
1502
Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]
1503
Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED
1504
section of png.h where they were inadvertently placed in version rc3.
1506
Version 1.2.6 and 1.0.16 [August 15, 2004]
1507
Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.
1509
Version 1.2.7beta1 [August 26, 2004]
1510
Removed unused pngasmrd.h file.
1511
Removed references to uu.net for archived files. Added references to
1512
PNG Spec (second edition) and the PNG ISO/IEC Standard.
1513
Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR.
1514
Fixed bug with "optimized window size" in the IDAT datastream, that
1515
causes libpng to write PNG files with incorrect zlib header bytes.
1517
Version 1.2.7beta2 [August 28, 2004]
1518
Fixed bug with sCAL chunk and big-endian machines (David Munro).
1519
Undid new code added in 1.2.6rc2 to update the color_type in
1521
Added png_set_add_alpha() that updates color type.
1523
Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]
1524
Revised png_set_strip_filler() to not remove alpha if color_type has alpha.
1526
Version 1.2.7 and 1.0.17 [September 12, 2004]
1528
Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin
1530
Version 1.2.8beta1 [November 1, 2004]
1531
Fixed bug in png_text_compress() that would fail to complete a large block.
1532
Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
1533
strip alpha operation in png_do_strip_filler().
1534
Added PNG_1_2_X definition in pngconf.h
1535
Use #ifdef to comment out png_info_init in png.c and png_read_init in
1536
pngread.c (as of 1.3.0)
1538
Version 1.2.8beta2 [November 2, 2004]
1539
Reduce color_type to a nonalpha type after strip alpha operation in
1540
png_do_strip_filler().
1542
Version 1.2.8beta3 [November 3, 2004]
1543
Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM
1545
Version 1.2.8beta4 [November 12, 2004]
1546
Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).
1547
Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).
1548
Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection
1549
of data type in deflate (Cosmin).
1550
Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of
1551
PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
1553
Version 1.2.8beta5 [November 20, 2004]
1554
Use png_ptr->flags instead of png_ptr->transformations to pass
1555
PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI
1557
Revised handling of SPECIALBUILD, PRIVATEBUILD,
1558
PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
1560
Version 1.2.8rc1 [November 24, 2004]
1561
Moved handling of BUILD macros from pngconf.h to png.h
1562
Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently
1564
Revised scripts/pngw32.rc
1565
Despammed mailing addresses by masking "@" with "at".
1566
Inadvertently installed a supposedly faster test version of pngrutil.c
1568
Version 1.2.8rc2 [November 26, 2004]
1569
Added two missing "\" in png.h
1570
Change tests in pngread.c and pngpread.c to
1571
if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
1572
png_do_read_transformations(png_ptr);
1574
Version 1.2.8rc3 [November 28, 2004]
1575
Reverted pngrutil.c to version libpng-1.2.8beta5.
1576
Added scripts/makefile.elf with supporting code in pngconf.h for symbol
1577
versioning (John Bowler).
1579
Version 1.2.8rc4 [November 29, 2004]
1580
Added projects/visualc7 (Simon-pierre).
1582
Version 1.2.8rc5 [November 29, 2004]
1583
Fixed new typo in scripts/pngw32.rc
1585
Version 1.2.8 [December 3, 2004]
1586
Removed projects/visualc7, added projects/visualc71.
1588
Version 1.2.9beta1 [February 21, 2006]
1589
Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints
1590
Revised man page and libpng.txt to make it clear that one should not call
1591
png_read_end or png_write_end after png_read_png or png_write_png.
1592
Updated references to png-mng-implement mailing list.
1593
Fixed an incorrect typecast in pngrutil.c
1594
Added PNG_NO_READ_SUPPORTED conditional for making a write-only library.
1595
Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional.
1596
Optimized alpha-inversion loops in pngwtran.c
1597
Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c
1598
Make sure num_trans is <= 256 before copying data in png_set_tRNS().
1599
Make sure num_palette is <= 256 before copying data in png_set_PLTE().
1600
Interchanged order of write_swap_alpha and write_invert_alpha transforms.
1601
Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).
1602
Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin).
1603
Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin).
1604
Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16,
1605
png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin).
1606
Added type cast (png_byte) in png_write_sCAL() (Cosmin).
1607
Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin).
1608
Default iTXt support was inadvertently enabled.
1610
Version 1.2.9beta2 [February 21, 2006]
1611
Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
1612
checking for png_read_dither in pngrtran.c
1613
Revised checking of chromaticity limits to accommodate extended RGB
1614
colorspace (John Denker).
1615
Changed line endings in some of the project files to CRLF, even in the
1616
"Unix" tar distributions (Cosmin).
1617
Made png_get_int_32 and png_save_int_32 always available (Cosmin).
1618
Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def
1619
with the newly exported functions.
1620
Eliminated distributions without the "configure" script.
1621
Updated INSTALL instructions.
1623
Version 1.2.9beta3 [February 24, 2006]
1624
Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp
1625
Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)
1626
Removed reference to pngasmrd.h from Makefile.am
1627
Renamed CHANGES to ChangeLog.
1628
Renamed LICENSE to COPYING.
1629
Renamed ANNOUNCE to NEWS.
1630
Created AUTHORS file.
1632
Version 1.2.9beta4 [March 3, 2006]
1633
Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
1634
Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
1635
Removed newline from the end of some error and warning messages.
1636
Removed test for sqrt() from configure.ac and configure.
1637
Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).
1638
Disabled default iTXt support that was inadvertently enabled in
1640
Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
1641
Removed libpng version and date from *.c files.
1643
Version 1.2.9beta5 [March 4, 2006]
1644
Removed trailing blanks from source files.
1645
Put version and date of latest change in each source file, and changed
1646
copyright year accordingly.
1647
More cleanup of configure.ac, Makefile.am, and associated scripts.
1648
Restored scripts/makefile.elf which was inadvertently deleted.
1650
Version 1.2.9beta6 [March 6, 2006]
1651
Fixed typo (RELEASE) in configuration files.
1653
Version 1.2.9beta7 [March 7, 2006]
1654
Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
1655
Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()
1657
Updated makefile.elf as suggested by debian.
1658
Made cosmetic changes to some makefiles, adding LN_SF and other macros.
1659
Made some makefiles accept "exec_prefix".
1661
Version 1.2.9beta8 [March 9, 2006]
1662
Fixed some "#if defined (..." which should be "#if defined(..."
1663
Bug introduced in libpng-1.2.8.
1664
Fixed inconsistency in definition of png_default_read_data()
1665
Restored blank that was lost from makefile.sggcc "clean" target in beta7.
1666
Revised calculation of "current" and "major" for irix in ltmain.sh
1667
Changed "mkdir" to "MKDIR_P" in some makefiles.
1668
Separated PNG_EXPAND and PNG_EXPAND_tRNS.
1669
Added png_set_expand_gray_1_2_4_to_8() and deprecated
1670
png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.
1672
Version 1.2.9beta9 [March 10, 2006]
1673
Include "config.h" in pngconf.h when available.
1674
Added some checks for NULL png_ptr or NULL info_ptr (timeless)
1676
Version 1.2.9beta10 [March 20, 2006]
1677
Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)
1678
Made pnggccrd.c PIC-compliant (Christian Aichinger).
1679
Added makefile.mingw (Wolfgang Glas).
1680
Revised pngconf.h MMX checking.
1682
Version 1.2.9beta11 [March 22, 2006]
1683
Fixed out-of-order declaration in pngwrite.c that was introduced in beta9
1684
Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.
1686
Version 1.2.9rc1 [March 31, 2006]
1687
Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).
1688
Removed nonsensical assertion check from pngtest.c (Cosmin).
1690
Version 1.2.9 [April 14, 2006]
1691
Revised makefile.beos and added "none" selector in ltmain.sh
1693
Version 1.2.10beta1 [April 15, 2006]
1694
Renamed "config.h" to "png_conf.h" and revised Makefile.am to add
1695
-DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h
1696
to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.
1698
Version 1.2.10beta2 [April 15, 2006]
1699
Manually updated Makefile.in and configure. Changed png_conf.h.in
1702
Version 1.2.10beta3 [April 15, 2006]
1703
Change png_conf.h back to config.h in pngconf.h.
1705
Version 1.2.10beta4 [April 16, 2006]
1706
Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.
1708
Version 1.2.10beta5 [April 16, 2006]
1709
Added a configure check for compiling assembler code in pnggccrd.c
1711
Version 1.2.10beta6 [April 17, 2006]
1712
Revised the configure check for pnggccrd.c
1713
Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@
1714
Added @LIBPNG_DEFINES@ to arguments when building libpng.sym
1716
Version 1.2.10beta7 [April 18, 2006]
1717
Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.
1719
Version 1.2.10rc1 [April 19, 2006]
1720
Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD
1721
Fixed "LN_FS" typo in makefile.sco and makefile.solaris.
1723
Version 1.2.10rc2 [April 20, 2006]
1724
Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE
1725
in configure.ac and configure
1726
Made the configure warning about versioned symbols less arrogant.
1728
Version 1.2.10rc3 [April 21, 2006]
1729
Added a note in libpng.txt that png_set_sig_bytes(8) can be used when
1730
writing an embedded PNG without the 8-byte signature.
1731
Revised makefiles and configure to avoid making links to libpng.so.*
1733
Version 1.2.10 [April 23, 2006]
1734
Reverted configure to "rc2" state.
1736
Version 1.2.11beta1 [May 31, 2006]
1737
scripts/libpng.pc.in contained "configure" style version info and would
1738
not work with makefiles.
1739
The shared-library makefiles were linking to libpng.so.0 instead of
1740
libpng.so.3 compatibility as the library.
1742
Version 1.2.11beta2 [June 2, 2006]
1743
Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1745
Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb)
1747
Version 1.2.11beta3 [June 5, 2006]
1748
Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin).
1749
Removed the accidental leftover Makefile.in~ (Cosmin).
1750
Avoided potential buffer overflow and optimized buffer in
1751
png_write_sCAL(), png_write_sCAL_s() (Cosmin).
1752
Removed the include directories and libraries from CFLAGS and LDFLAGS
1753
in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin).
1755
Version 1.2.11beta4 [June 6, 2006]
1756
Allow zero-length IDAT chunks after the entire zlib datastream, but not
1757
after another intervening chunk type.
1759
Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]
1760
Deleted extraneous square brackets from [config.h] in configure.ac
1762
Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]
1763
Added prototypes for PNG_INCH_CONVERSIONS functions to png.h
1764
Revised INSTALL and autogen.sh
1765
Fixed typo in several makefiles (-W1 should be -Wl)
1766
Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
1768
Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]
1769
Removed the new typedefs for 64-bit systems (delay until version 1.4.0)
1770
Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid
1771
reading out of bounds.
1773
Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]
1774
Really removed the new typedefs for 64-bit systems.
1776
Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]
1777
Removed png_sig_bytes entry from scripts/pngw32.def
1779
Version 1.0.19, 1.2.11 [June 26, 2006]
1782
Version 1.0.20, 1.2.12 [June 27, 2006]
1783
Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1786
Version 1.2.13beta1 [October 2, 2006]
1787
Removed AC_FUNC_MALLOC from configure.ac
1788
Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
1789
Change "logical" to "bitwise" throughout documentation.
1790
Detect and fix attempt to write wrong iCCP profile length (CVE-2006-7244)
1792
Version 1.0.21, 1.2.13 [November 14, 2006]
1793
Fix potential buffer overflow in sPLT chunk handler.
1794
Fix Makefile.am to not try to link to noexistent files.
1795
Check all exported functions for NULL png_ptr.
1797
Version 1.2.14beta1 [November 17, 2006]
1798
Relocated three misplaced tests for NULL png_ptr.
1799
Built Makefile.in with automake-1.9.6 instead of 1.9.2.
1800
Build configure with autoconf-2.60 instead of 2.59
1802
Version 1.2.14beta2 [November 17, 2006]
1803
Added some typecasts in png_zalloc().
1805
Version 1.2.14rc1 [November 20, 2006]
1806
Changed "strtod" to "png_strtod" in pngrutil.c
1808
Version 1.0.22, 1.2.14 [November 27, 2006]
1809
Added missing "$(srcdir)" in Makefile.am and Makefile.in
1811
Version 1.2.15beta1 [December 3, 2006]
1812
Generated configure with autoconf-2.61 instead of 2.60
1813
Revised configure.ac to update libpng.pc and libpng-config.
1815
Version 1.2.15beta2 [December 3, 2006]
1816
Always export MMX asm functions, just stubs if not building pnggccrd.c
1818
Version 1.2.15beta3 [December 4, 2006]
1819
Add "png_bytep" typecast to profile while calculating length in pngwutil.c
1821
Version 1.2.15beta4 [December 7, 2006]
1822
Added scripts/CMakeLists.txt
1823
Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta
1825
Version 1.2.15beta5 [December 7, 2006]
1826
Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c
1827
Revised scripts/CMakeLists.txt
1829
Version 1.2.15beta6 [December 13, 2006]
1830
Revised scripts/CMakeLists.txt and configure.ac
1832
Version 1.2.15rc1 [December 18, 2006]
1833
Revised scripts/CMakeLists.txt
1835
Version 1.2.15rc2 [December 21, 2006]
1836
Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
1837
Added scripts/makefile.nommx
1839
Version 1.2.15rc3 [December 25, 2006]
1840
Fixed shared library numbering error that was introduced in 1.2.15beta6.
1842
Version 1.2.15rc4 [December 27, 2006]
1843
Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.
1845
Version 1.2.15rc5 [December 31, 2006]
1846
Revised handling of rgb_to_gray.
1848
Version 1.2.15 [January 5, 2007]
1849
Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
1851
Version 1.2.16beta1 [January 6, 2007]
1852
Fix bugs in makefile.nommx
1854
Version 1.2.16beta2 [January 16, 2007]
1855
Revised scripts/CMakeLists.txt
1857
Version 1.2.16 [January 31, 2007]
1860
Version 1.2.17beta1 [March 6, 2007]
1861
Revised scripts/CMakeLists.txt to install both shared and static libraries.
1862
Deleted a redundant line from pngset.c.
1864
Version 1.2.17beta2 [April 26, 2007]
1865
Relocated misplaced test for png_ptr == NULL in pngpread.c
1866
Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN
1868
Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_*
1869
Added pngerror() when write_IHDR fails in deflateInit2().
1870
Added "const" to some array declarations.
1871
Mention examples of libpng usage in the libpng*.txt and libpng.3 documents.
1873
Version 1.2.17rc1 [May 4, 2007]
1876
Version 1.2.17rc2 [May 8, 2007]
1877
Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications
1878
calling set_unknown_chunk_location() need them.
1879
Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in
1880
png_set_expand_gray_1_2_4_to_8().
1881
Added png_ptr->unknown_chunk to hold working unknown chunk data, so it
1882
can be free'ed in case of error. Revised unknown chunk handling in
1883
pngrutil.c and pngpread.c to use this structure.
1885
Version 1.2.17rc3 [May 8, 2007]
1886
Revised symbol-handling in configure script.
1888
Version 1.2.17rc4 [May 10, 2007]
1889
Revised unknown chunk handling to avoid storing unknown critical chunks.
1891
Version 1.0.25 [May 15, 2007]
1892
Version 1.2.17 [May 15, 2007]
1893
Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,
1894
to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664)
1896
Version 1.0.26 [May 15, 2007]
1897
Version 1.2.18 [May 15, 2007]
1898
Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script
1900
Version 1.2.19beta1 [May 18, 2007]
1901
Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
1902
change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST"
1903
Changed some handling of unused parameters, to avoid compiler warnings.
1904
"if (unused == NULL) return;" becomes "unused = unused".
1906
Version 1.2.19beta2 [May 18, 2007]
1907
Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier)
1909
Version 1.2.19beta3 [May 19, 2007]
1910
Add some "png_byte" typecasts in png_check_keyword() and write new_key
1911
instead of key in zTXt chunk (Kevin Ryde).
1913
Version 1.2.19beta4 [May 21, 2007]
1914
Add png_snprintf() function and use it in place of sprint() for improved
1915
defense against buffer overflows.
1917
Version 1.2.19beta5 [May 21, 2007]
1918
Fixed png_handle_tRNS() to only use the valid bits of tRNS value.
1919
Changed handling of more unused parameters, to avoid compiler warnings.
1920
Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.
1922
Version 1.2.19beta6 [May 22, 2007]
1923
Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
1924
Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
1926
Version 1.2.19beta7 [May 22, 2007]
1927
Squelched png_squelch_warnings() in pnggccrd.c and added
1928
an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
1929
the warnings that png_squelch_warnings was squelching.
1931
Version 1.2.19beta8 [May 22, 2007]
1932
Removed __MMX__ from test in pngconf.h.
1934
Version 1.2.19beta9 [May 23, 2007]
1935
Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
1936
Revised png_squelch_warnings() so it might work.
1937
Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.
1939
Version 1.2.19beta10 [May 24, 2007]
1940
Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.
1942
Version 1.4.0beta1 [April 20, 2006]
1943
Enabled iTXt support (changes png_struct, thus requires so-number change).
1944
Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED
1945
Eliminated PNG_1_0_X and PNG_1_2_X macros.
1946
Removed deprecated functions png_read_init, png_write_init, png_info_init,
1947
png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and
1948
removed the deprecated macro PNG_MAX_UINT.
1949
Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h
1950
Removed many WIN32_WCE #ifdefs (Cosmin).
1951
Reduced dependency on C-runtime library when on Windows (Simon-Pierre)
1952
Replaced sprintf() with png_sprintf() (Simon-Pierre)
1954
Version 1.4.0beta2 [April 20, 2006]
1955
Revised makefiles and configure to avoid making links to libpng.so.*
1956
Moved some leftover MMX-related defines from pngconf.h to pngintrn.h
1957
Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def
1959
Version 1.4.0beta3 [May 10, 2006]
1960
Updated scripts/pngw32.def to comment out MMX functions.
1961
Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros.
1962
Scripts/libpng.pc.in contained "configure" style version info and would
1963
not work with makefiles.
1964
Revised pngconf.h and added pngconf.h.in, so makefiles and configure can
1965
pass defines to libpng and applications.
1967
Version 1.4.0beta4 [May 11, 2006]
1968
Revised configure.ac, Makefile.am, and many of the makefiles to write
1969
their defines in pngconf.h.
1971
Version 1.4.0beta5 [May 15, 2006]
1972
Added a missing semicolon in Makefile.am and Makefile.in
1973
Deleted extraneous square brackets from configure.ac
1975
Version 1.4.0beta6 [June 2, 2006]
1976
Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
1978
Changed sonum from 0 to 1.
1979
Removed unused prototype for png_check_sig() from png.h
1981
Version 1.4.0beta7 [June 16, 2006]
1982
Exported png_write_sig (Cosmin).
1983
Optimized buffer in png_handle_cHRM() (Cosmin).
1984
Set pHYs = 2835 x 2835 pixels per meter, and added
1985
sCAL = 0.352778e-3 x 0.352778e-3 meters, in pngtest.png (Cosmin).
1986
Added png_set_benign_errors(), png_benign_error(), png_chunk_benign_error().
1987
Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
1988
Added "(unsigned long)" typecast on png_uint_32 variables in printf lists.
1990
Version 1.4.0beta8 [June 22, 2006]
1991
Added demonstration of user chunk support in pngtest.c, to support the
1992
public sTER chunk and a private vpAg chunk.
1994
Version 1.4.0beta9 [July 3, 2006]
1995
Removed ordinals from scripts/pngw32.def and removed png_info_int and
1996
png_set_gray_1_2_4_to_8 entries.
1997
Inline call of png_get_uint_32() in png_get_uint_31().
1998
Use png_get_uint_31() to get vpAg width and height in pngtest.c
1999
Removed WINCE and Netware projects.
2000
Removed standalone Y2KINFO file.
2002
Version 1.4.0beta10 [July 12, 2006]
2003
Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and
2004
some makefiles, because it was not working reliably. Instead, distribute
2005
pngconf.h.in along with pngconf.h and cause configure and some of the
2006
makefiles to update pngconf.h from pngconf.h.in.
2007
Added pngconf.h to DEPENDENCIES in Makefile.am
2009
Version 1.4.0beta11 [August 19, 2006]
2010
Removed AC_FUNC_MALLOC from configure.ac.
2011
Added a warning when writing iCCP profile with mismatched profile length.
2012
Patched pnggccrd.c to assemble on x86_64 platforms.
2013
Moved chunk header reading into a separate function png_read_chunk_header()
2014
in pngrutil.c. The chunk header (len+sig) is now serialized in a single
2016
Implemented support for I/O states. Added png_ptr member io_state, and
2017
functions png_get_io_chunk_name() and png_get_io_state() in pngget.c
2019
Added png_get_io_chunk_name and png_get_io_state to scripts/*.def (Cosmin).
2020
Renamed scripts/pngw32.* to scripts/pngwin.* (Cosmin).
2021
Removed the include directories and libraries from CFLAGS and LDFLAGS
2022
in scripts/makefile.gcc (Cosmin).
2023
Used png_save_uint_32() to set vpAg width and height in pngtest.c (Cosmin).
2024
Cast to proper type when getting/setting vpAg units in pngtest.c (Cosmin).
2025
Added pngintrn.h to the Visual C++ projects (Cosmin).
2026
Removed scripts/list (Cosmin).
2027
Updated copyright year in scripts/pngwin.def (Cosmin).
2028
Removed PNG_TYPECAST_NULL and used standard NULL consistently (Cosmin).
2029
Disallowed the user to redefine png_size_t, and enforced a consistent use
2030
of png_size_t across libpng (Cosmin).
2031
Changed the type of png_ptr->rowbytes, PNG_ROWBYTES() and friends
2032
to png_size_t (Cosmin).
2033
Removed png_convert_size() and replaced png_sizeof with sizeof (Cosmin).
2034
Removed some unnecessary type casts (Cosmin).
2035
Changed prototype of png_get_compression_buffer_size() and
2036
png_set_compression_buffer_size() to work with png_size_t instead of
2037
png_uint_32 (Cosmin).
2038
Removed png_memcpy_check() and png_memset_check() (Cosmin).
2039
Fixed a typo (png_byte --> png_bytep) in libpng.3 and libpng.txt (Cosmin).
2040
Clarified that png_zalloc() does not clear the allocated memory,
2041
and png_zalloc() and png_zfree() cannot be PNGAPI (Cosmin).
2042
Renamed png_mem_size_t to png_alloc_size_t, fixed its definition in
2043
pngconf.h, and used it in all memory allocation functions (Cosmin).
2044
Renamed pngintrn.h to pngpriv.h, added a comment at the top of the file
2045
mentioning that the symbols declared in that file are private, and
2046
updated the scripts and the Visual C++ projects accordingly (Cosmin).
2047
Removed circular references between pngconf.h and pngconf.h.in in
2048
scripts/makefile.vc*win32 (Cosmin).
2049
Removing trailing '.' from the warning and error messages (Cosmin).
2050
Added pngdefs.h that is built by makefile or configure, instead of
2051
pngconf.h.in (Glenn).
2052
Detect and fix attempt to write wrong iCCP profile length.
2054
Version 1.4.0beta12 [October 19, 2006]
2055
Changed "logical" to "bitwise" in the documentation.
2056
Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
2057
Add a typecast to stifle compiler warning in pngrutil.c
2059
Version 1.4.0beta13 [November 10, 2006]
2060
Fix potential buffer overflow in sPLT chunk handler.
2061
Fix Makefile.am to not try to link to noexistent files.
2063
Version 1.4.0beta14 [November 15, 2006]
2064
Check all exported functions for NULL png_ptr.
2066
Version 1.4.0beta15 [November 17, 2006]
2067
Relocated two misplaced tests for NULL png_ptr.
2068
Built Makefile.in with automake-1.9.6 instead of 1.9.2.
2069
Build configure with autoconf-2.60 instead of 2.59
2070
Add "install: all" in Makefile.am so "configure; make install" will work.
2072
Version 1.4.0beta16 [November 17, 2006]
2073
Added a typecast in png_zalloc().
2075
Version 1.4.0beta17 [December 4, 2006]
2076
Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c
2077
Add "png_bytep" typecast to profile while calculating length in pngwutil.c
2079
Version 1.4.0beta18 [December 7, 2006]
2080
Added scripts/CMakeLists.txt
2082
Version 1.4.0beta19 [May 16, 2007]
2083
Revised scripts/CMakeLists.txt
2084
Rebuilt configure and Makefile.in with newer tools.
2085
Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
2086
Added scripts/makefile.nommx
2088
Version 1.4.0beta20 [July 9, 2008]
2089
Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications
2090
calling set_unknown_chunk_location() need them.
2091
Moved several macro definitions from pngpriv.h to pngconf.h
2092
Merge with changes to the 1.2.X branch, as of 1.2.30beta04.
2093
Deleted all use of the MMX assembler code and Intel-licensed optimizations.
2094
Revised makefile.mingw
2096
Version 1.4.0beta21 [July 21, 2008]
2097
Moved local array "chunkdata" from pngrutil.c to the png_struct, so
2098
it will be freed by png_read_destroy() in case of a read error (Kurt
2101
Version 1.4.0beta22 [July 21, 2008]
2102
Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking.
2104
Version 1.4.0beta23 [July 22, 2008]
2105
Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in
2106
png_decompress_chunk().
2108
Version 1.4.0beta24 [July 25, 2008]
2109
Change all remaining "chunkdata" to "png_ptr->chunkdata" in
2110
png_decompress_chunk(), and remove "chunkdata" from parameter list.
2111
Put a call to png_check_chunk_name() in png_read_chunk_header().
2112
Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte.
2113
Removed two calls to png_check_chunk_name() occurring later in the process.
2114
Define PNG_NO_ERROR_NUMBERS by default in pngconf.h
2116
Version 1.4.0beta25 [July 30, 2008]
2117
Added a call to png_check_chunk_name() in pngpread.c
2118
Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte.
2119
Added png_push_have_buffer() function to pngpread.c
2120
Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros.
2121
Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS.
2122
Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code.
2123
Synced contrib directory and configure files with libpng-1.2.30beta06.
2124
Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles)
2125
Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c
2127
Version 1.4.0beta26 [August 4, 2008]
2128
Removed png_push_have_buffer() function in pngpread.c. It increased the
2129
compiled library size slightly.
2130
Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta)
2131
Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings.
2132
Updated contrib/visupng/cexcept.h to version 2.0.1
2133
Added PNG_LITERAL_CHARACTER macros for #, [, and ].
2135
Version 1.4.0beta27 [August 5, 2008]
2136
Revised usage of PNG_LITERAL_SHARP in pngerror.c.
2137
Moved newline character from individual png_debug messages into the
2139
Allow user to #define their own png_debug, png_debug1, and png_debug2.
2141
Version 1.4.0beta28 [August 5, 2008]
2142
Revised usage of PNG_LITERAL_SHARP in pngerror.c.
2143
Added PNG_STRING_NEWLINE macro
2145
Version 1.4.0beta29 [August 9, 2008]
2146
Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers.
2147
Added PNG_STRING_COPYRIGHT macro.
2148
Added non-ISO versions of png_debug macros.
2150
Version 1.4.0beta30 [August 14, 2008]
2151
Added premultiplied alpha feature (Volker Wiendl).
2153
Version 1.4.0beta31 [August 18, 2008]
2154
Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c
2155
Removed extra crc check at the end of png_handle_cHRM(). Bug introduced
2156
in libpng-1.4.0beta20.
2158
Version 1.4.0beta32 [August 19, 2008]
2159
Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.
2160
Revised PNG_NO_STDIO version of png_write_flush()
2162
Version 1.4.0beta33 [August 20, 2008]
2163
Added png_get|set_chunk_cache_max() to limit the total number of sPLT,
2164
text, and unknown chunks that can be stored.
2166
Version 1.4.0beta34 [September 6, 2008]
2167
Shortened tIME_string to 29 bytes in pngtest.c
2168
Fixed off-by-one error introduced in png_push_read_zTXt() function in
2169
libpng-1.2.30beta04/pngpread.c (Harald van Dijk)
2171
Version 1.4.0beta35 [October 6, 2008]
2172
Changed "trans_values" to "trans_color".
2173
Changed so-number from 0 to 14. Some OS do not like 0.
2174
Revised makefile.darwin to fix shared library numbering.
2175
Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8()
2176
in example.c (debian bug report)
2178
Version 1.4.0beta36 [October 25, 2008]
2179
Sync with tEXt vulnerability fix in libpng-1.2.33rc02.
2181
Version 1.4.0beta37 [November 13, 2008]
2182
Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c,
2185
Version 1.4.0beta38 [November 22, 2008]
2186
Added check for zero-area RGB cHRM triangle in png_check_cHRM() and
2187
png_check_cHRM_fixed().
2189
Version 1.4.0beta39 [November 23, 2008]
2190
Revised png_warning() to write its message on standard output by default
2191
when warning_fn is NULL.
2193
Version 1.4.0beta40 [November 24, 2008]
2194
Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed().
2195
In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant
2196
check for all-zero coordinates that is detected by the triangle check.
2198
Version 1.4.0beta41 [November 26, 2008]
2199
Fixed string vs pointer-to-string error in png_check_keyword().
2200
Rearranged test expressions in png_check_cHRM_fixed() to avoid internal
2202
Added PNG_NO_CHECK_cHRM conditional.
2204
Version 1.4.0beta42, 43 [December 1, 2008]
2205
Merge png_debug with version 1.2.34beta04.
2207
Version 1.4.0beta44 [December 6, 2008]
2208
Removed redundant check for key==NULL before calling png_check_keyword()
2209
to ensure that new_key gets initialized and removed extra warning
2210
(Merge with version 1.2.34beta05 -- Arvan Pritchard).
2212
Version 1.4.0beta45 [December 9, 2008]
2213
In png_write_png(), respect the placement of the filler bytes in an earlier
2214
call to png_set_filler() (Jim Barry).
2216
Version 1.4.0beta46 [December 10, 2008]
2217
Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and
2218
PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated
2219
PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
2221
Version 1.4.0beta47 [December 15, 2008]
2222
Support for dithering was disabled by default, because it has never
2223
been well tested and doesn't work very well. The code has not
2224
been removed, however, and can be enabled by building libpng with
2225
PNG_READ_DITHER_SUPPORTED defined.
2227
Version 1.4.0beta48 [February 14, 2009]
2228
Added new exported function png_calloc().
2229
Combined several instances of png_malloc(); png_memset() into png_calloc().
2230
Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
2231
but was never defined.
2233
Version 1.4.0beta49 [February 28, 2009]
2234
Added png_fileno() macro to pngconf.h, used in pngwio.c
2235
Corrected order of #ifdef's in png_debug definition in png.h
2236
Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments
2238
Fixed order of #ifdef directives in the png_debug defines in png.h
2239
(bug introduced in libpng-1.2.34/1.4.0beta29).
2240
Revised comments in png_set_read_fn() and png_set_write_fn().
2242
Version 1.4.0beta50 [March 18, 2009]
2243
Use png_calloc() instead of png_malloc() to allocate big_row_buf when
2244
reading an interlaced file, to avoid a possible UMR.
2245
Undid revision of PNG_NO_STDIO version of png_write_flush(). Users
2246
having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined
2247
or supply their own flush_fn() replacement.
2248
Revised libpng*.txt and png.h documentation about use of png_write_flush()
2249
and png_set_write_fn().
2250
Removed fflush() from pngtest.c.
2251
Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
2253
Version 1.4.0beta51 [March 21, 2009]
2254
Removed new png_fileno() macro from pngconf.h .
2256
Version 1.4.0beta52 [March 27, 2009]
2257
Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
2258
This avoids building 16-bit gamma tables unnecessarily.
2259
Removed fflush() from pngtest.c.
2260
Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
2261
Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt
2263
Version 1.4.0beta53 [April 1, 2009]
2264
Removed some remaining MMX macros from pngpriv.h
2265
Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)
2267
Version 1.4.0beta54 [April 13, 2009]
2268
Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow
2269
application code writers to bypass the check for multiple inclusion
2270
of setjmp.h when they know that it is safe to ignore the situation.
2271
Eliminated internal use of setjmp() in pngread.c and pngwrite.c
2272
Reordered ancillary chunks in pngtest.png to be the same as what
2273
pngtest now produces, and made some cosmetic changes to pngtest output.
2274
Eliminated deprecated png_read_init_3() and png_write_init_3() functions.
2276
Version 1.4.0beta55 [April 15, 2009]
2277
Simplified error handling in pngread.c and pngwrite.c by putting
2278
the new png_read_cleanup() and png_write_cleanup() functions inline.
2280
Version 1.4.0beta56 [April 25, 2009]
2281
Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress
2282
"shadowed declaration" warning from gcc-4.3.3.
2283
Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"
2284
warning about a global "gamma" variable in math.h on some platforms.
2286
Version 1.4.0beta57 [May 2, 2009]
2287
Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
2288
but was never defined (again).
2289
Rebuilt configure scripts with autoconf-2.63 instead of 2.62
2290
Removed pngprefs.h and MMX from makefiles
2292
Version 1.4.0beta58 [May 14, 2009]
2293
Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced
2295
Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
2297
Version 1.4.0beta59 [May 15, 2009]
2298
Reformatted sources in libpng style (3-space indentation, comment format)
2299
Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)
2300
Added sections about the git repository and our coding style to the
2302
Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.
2304
Version 1.4.0beta60 [May 19, 2009]
2305
Conditionally compile png_read_finish_row() which is not used by
2306
progressive readers.
2307
Added contrib/pngminim/preader to demonstrate building minimal progressive
2308
decoder, based on contrib/gregbook with embedded libpng and zlib.
2310
Version 1.4.0beta61 [May 20, 2009]
2311
In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there
2312
is only one makefile in those directories, and revised the README files
2314
More reformatting of comments, mostly to capitalize sentences.
2316
Version 1.4.0beta62 [June 2, 2009]
2317
Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
2318
and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
2319
Reformatted several remaining "else statement" into two lines.
2320
Added a section to the libpng documentation about using png_get_io_ptr()
2321
in configure scripts to detect the presence of libpng.
2323
Version 1.4.0beta63 [June 15, 2009]
2324
Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
2325
multiple times and to specify the sample order in the tRNS chunk,
2326
because the ISO PNG specification has a typo in the tRNS table.
2327
Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
2328
PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
2329
available for ignoring known chunks even when not saving unknown chunks.
2330
Adopted preference for consistent use of "#ifdef" and "#ifndef" versus
2331
"#if defined()" and "if !defined()" where possible.
2333
Version 1.4.0beta64 [June 24, 2009]
2334
Eliminated PNG_LEGACY_SUPPORTED code.
2335
Moved the various unknown chunk macro definitions outside of the
2336
PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
2338
Version 1.4.0beta65 [June 26, 2009]
2339
Added a reference to the libpng license in each file.
2341
Version 1.4.0beta66 [June 27, 2009]
2342
Refer to the libpng license instead of the libpng license in each file.
2344
Version 1.4.0beta67 [July 6, 2009]
2345
Relocated INVERT_ALPHA within png_read_png() and png_write_png().
2346
Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.
2347
Added an "xcode" project to the projects directory (Alam Arias).
2349
Version 1.4.0beta68 [July 19, 2009]
2350
Avoid some tests in filter selection in pngwutil.c
2352
Version 1.4.0beta69 [July 25, 2009]
2353
Simplified the new filter-selection test. This runs faster in the
2354
common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases.
2355
Removed extraneous declaration from the new call to png_read_gray_to_rgb()
2356
(bug introduced in libpng-1.4.0beta67).
2357
Fixed up xcode project (Alam Arias)
2358
Added a prototype for png_64bit_product() in png.c
2360
Version 1.4.0beta70 [July 27, 2009]
2361
Avoid a possible NULL dereference in debug build, in png_set_text_2().
2362
(bug introduced in libpng-0.95, discovered by Evan Rouault)
2364
Version 1.4.0beta71 [July 29, 2009]
2365
Rebuilt configure scripts with autoconf-2.64.
2367
Version 1.4.0beta72 [August 1, 2009]
2368
Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec
2369
from <http://tukaani.org/xz>.
2371
Version 1.4.0beta73 [August 1, 2009]
2372
Reject attempt to write iCCP chunk with negative embedded profile length
2373
(JD Chen) (CVE-2009-5063).
2375
Version 1.4.0beta74 [August 8, 2009]
2376
Changed png_ptr and info_ptr member "trans" to "trans_alpha".
2378
Version 1.4.0beta75 [August 21, 2009]
2379
Removed an extra png_debug() recently added to png_write_find_filter().
2380
Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
2382
Version 1.4.0beta76 [August 22, 2009]
2383
Moved an incorrectly located test in png_read_row() in pngread.c
2385
Version 1.4.0beta77 [August 27, 2009]
2386
Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt,
2387
and the "noconfig" files from the distribution.
2388
Moved CMakeLists.txt from scripts into the main libpng directory.
2389
Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
2391
Version 1.4.0beta78 [August 31, 2009]
2392
Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
2393
Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros.
2394
Use png_malloc plus a loop instead of png_calloc() to initialize
2395
row_pointers in png_read_png().
2397
Version 1.4.0beta79 [September 1, 2009]
2398
Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays.
2399
Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc().
2401
Version 1.4.0beta80 [September 17, 2009]
2402
Removed scripts/libpng.icc
2403
Changed typecast of filler from png_byte to png_uint_16 in png_set_filler().
2405
Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ")2407
Version 1.4.0beta81 [September 23, 2009]
2408
Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h
2409
Expanded TAB characters in pngrtran.c
2410
Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid
2411
compiler complaints about doubly declaring things "const".
2412
Changed all "#if [!]defined(X)" to "if[n]def X" where possible.
2413
Eliminated unused png_ptr->row_buf_size
2415
Version 1.4.0beta82 [September 25, 2009]
2416
Moved redundant IHDR checking into new png_check_IHDR() in png.c
2417
and report all errors found in the IHDR data.
2418
Eliminated useless call to png_check_cHRM() from pngset.c
2420
Version 1.4.0beta83 [September 25, 2009]
2421
Revised png_check_IHDR() to eliminate bogus complaint about filter_type.
2423
Version 1.4.0beta84 [September 30, 2009]
2424
Fixed some inconsistent indentation in pngconf.h
2425
Revised png_check_IHDR() to add a test for width variable less than 32-bit.
2427
Version 1.4.0beta85 [October 1, 2009]
2428
Revised png_check_IHDR() again, to check info_ptr members instead of
2429
the contents of the returned parameters.
2431
Version 1.4.0beta86 [October 9, 2009]
2432
Updated the "xcode" project (Alam Arias).
2433
Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
2435
Version 1.4.0rc01 [October 19, 2009]
2436
Trivial cosmetic changes.
2438
Version 1.4.0beta87 [October 30, 2009]
2439
Moved version 1.4.0 back into beta.
2441
Version 1.4.0beta88 [October 30, 2009]
2442
Revised libpng*.txt section about differences between 1.2.x and 1.4.0
2443
because most of the new features have now been ported back to 1.2.41
2445
Version 1.4.0beta89 [November 1, 2009]
2446
More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
2447
Removed a harmless extra png_set_invert_alpha() from pngwrite.c
2448
Apply png_user_chunk_cache_max within png_decompress_chunk().
2449
Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.
2451
Version 1.4.0beta90 [November 2, 2009]
2452
Removed all remaining WIN32_WCE #ifdefs except those involving the
2453
time.h "tm" structure
2455
Version 1.4.0beta91 [November 3, 2009]
2456
Updated scripts/pngw32.def and projects/wince/png32ce.def
2457
Copied projects/wince/png32ce.def to the scripts directory.
2458
Added scripts/makefile.wce
2459
Patched ltmain.sh for wince support.
2460
Added PNG_CONVERT_tIME_SUPPORTED macro.
2462
Version 1.4.0beta92 [November 4, 2009]
2463
Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
2464
Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED
2465
Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead
2466
of differences from 1.2.41 to 1.4.0)
2468
Version 1.4.0beta93 [November 7, 2009]
2469
Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and
2470
PNG_ALLOCATED macros to detect deprecated direct access to the
2471
png_struct or info_struct members and other deprecated usage in
2472
applications (John Bowler).
2473
Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS,
2474
to prevent warnings about direct access to png structs by libpng
2475
functions while building libpng. They need to be tested, especially
2476
those using compilers other than gcc.
2477
Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG".
2478
They should work but still need to be updated to remove
2479
references to pnggccrd.c or pngvcrd.c and ASM building.
2480
Added README.txt to the beos, cbuilder5, netware, and xcode projects warning
2481
that they need to be updated, to remove references to pnggccrd.c and
2482
pngvcrd.c and to depend on pngpriv.h
2483
Removed three direct references to read_info_ptr members in pngtest.c
2484
that were detected by the new PNG_DEPSTRUCT macro.
2485
Moved the png_debug macro definitions and the png_read_destroy(),
2486
png_write_destroy() and png_far_to_near() prototypes from png.h
2487
to pngpriv.h (John Bowler)
2488
Moved the synopsis lines for png_read_destroy(), png_write_destroy()
2489
png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3.
2491
Version 1.4.0beta94 [November 9, 2009]
2492
Removed the obsolete, unused pnggccrd.c and pngvcrd.c files.
2493
Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
2494
Removed dependency of pngtest.o on pngpriv.h in the makefiles.
2495
Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
2497
Version 1.4.0beta95 [November 10, 2009]
2498
Changed png_check_sig() to !png_sig_cmp() in contrib programs.
2499
Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile
2500
Changed png_check_sig() to !png_sig_cmp() in contrib programs.
2501
Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
2502
Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c
2503
Added dependency on pngpriv.h in contrib/pngminim/*/makefile
2505
Version 1.4.0beta96 [November 12, 2009]
2506
Renamed scripts/makefile.wce to scripts/makefile.cegcc
2507
Revised Makefile.am to use libpng.sys while building libpng.so
2508
so that only PNG_EXPORT functions are exported.
2509
Removed the deprecated png_check_sig() function/macro.
2510
Removed recently removed function names from scripts/*.def
2511
Revised pngtest.png to put chunks in the same order written by pngtest
2512
(evidently the same change made in libpng-1.0beta54 was lost).
2513
Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
2515
Version 1.4.0beta97 [November 13, 2009]
2516
Restored pngtest.png to the libpng-1.4.0beta7 version.
2517
Removed projects/beos and netware.txt; no one seems to be supporting them.
2520
Version 1.4.0beta98 [November 13, 2009]
2521
Added the "xcode" project to zip distributions,
2522
Fixed a typo in scripts/pngwin.def introduced in beta97.
2524
Version 1.4.0beta99 [November 14, 2009]
2525
Moved libpng-config.in and libpng.pc-configure.in out of the scripts
2526
directory, to libpng-config.in and libpng-pc.in, respectively, and
2527
modified Makefile.am and configure.ac accordingly. Now "configure"
2528
needs nothing from the "scripts" directory.
2529
Avoid redefining PNG_CONST in pngconf.h
2531
Version 1.4.0beta100 [November 14, 2009]
2532
Removed ASM builds from projects/visualc6 and projects/visualc71
2533
Removed scripts/makefile.nommx and makefile.vcawin32
2534
Revised CMakeLists.txt to account for new location of libpng-config.in
2536
Updated INSTALL to reflect removal and relocation of files.
2538
Version 1.4.0beta101 [November 14, 2009]
2539
Restored the binary files (*.jpg, *.png, some project files) that were
2540
accidentally deleted from the zip and 7z distributions when the xcode
2543
Version 1.4.0beta102 [November 18, 2009]
2544
Added libpng-config.in and libpng-pc.in to the zip and 7z distributions.
2545
Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100.
2546
Moved descriptions of makefiles and other scripts out of INSTALL into
2548
Updated the copyright year in scripts/pngwin.rc from 2006 to 2009.
2550
Version 1.4.0beta103 [November 21, 2009]
2551
Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt
2552
Align row_buf on 16-byte boundary in memory.
2553
Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call
2554
to png_flush() after png_write_IEND(). See 1.4.0beta32, 1.4.0beta50
2555
changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES. Someone
2557
Make the 'png_jmpbuf' macro expand to a call that records the correct
2558
longjmp function as well as returning a pointer to the setjmp
2559
jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
2562
Version 1.4.0beta104 [November 22, 2009]
2563
Removed png_longjmp_ptr from scripts/*.def and libpng.3
2564
Rebuilt configure scripts with autoconf-2.65
2566
Version 1.4.0beta105 [November 25, 2009]
2567
Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535()
2568
to accomplish alpha premultiplication when
2569
PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined.
2570
Changed "/255" to "/255.0" in background calculations to make it clear
2571
that the 255 is used as a double.
2573
Version 1.4.0beta106 [November 27, 2009]
2574
Removed premultiplied alpha feature.
2576
Version 1.4.0beta107 [December 4, 2009]
2578
Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
2579
Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
2580
Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
2581
to put png.h and pngconf.h in $prefix/include, like the other scripts,
2582
instead of in $prefix/include/libpng. Also revised makefile.sco
2583
to put them in $prefix/include/libpng15 instead of in
2584
$prefix/include/libpng/libpng15.
2586
Version 1.4.0beta108 [December 11, 2009]
2587
Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
2588
Relocated png_do_chop() to its original position in pngrtran.c; the
2589
change in version 1.2.41beta08 caused transparency to be handled wrong
2590
in some 16-bit datastreams (Yusaku Sugai).
2592
Version 1.4.0beta109 [December 13, 2009]
2593
Added "bit_depth" parameter to the private png_build_gamma_table() function.
2594
Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the
2595
PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit
2598
Version 1.4.0rc02 [December 20, 2009]
2599
Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c
2601
Version 1.4.0rc03 [December 22, 2009]
2602
Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
2603
(revising the change in 1.4.0beta99)
2605
Version 1.4.0rc04 [December 25, 2009]
2606
Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED
2607
in pngset.c to be consistent with other changes in version 1.2.38.
2609
Version 1.4.0rc05 [December 25, 2009]
2610
Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and
2611
Makefile.in to be consistent with changes in libpng-1.4.0rc03
2613
Version 1.4.0rc06 [December 29, 2009]
2614
Reverted the gamma_table changes from libpng-1.4.0beta109.
2615
Fixed some indentation errors.
2617
Version 1.4.0rc07 [January 1, 2010]
2618
Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences.
2619
Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c
2620
Update copyright year to 2010.
2622
Version 1.4.0rc08 [January 2, 2010]
2623
Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr
2626
Version 1.4.0 [January 3, 2010]
2629
Version 1.4.1beta01 [January 8, 2010]
2630
Updated CMakeLists.txt for consistent indentation and to avoid an
2631
unclosed if-statement warning (Philip Lowman).
2632
Revised Makefile.am and Makefile.in to remove references to Y2KINFO,
2633
KNOWNBUG, and libpng.la (Robert Schwebel).
2634
Revised the makefiles to install the same files and symbolic
2635
links as configure, except for libpng.la and libpng14.la.
2636
Make png_set|get_compression_buffer_size() available even when
2637
PNG_WRITE_SUPPORTED is not enabled.
2638
Revised Makefile.am and Makefile.in to simplify their maintenance.
2639
Revised scripts/makefile.linux to install a link to libpng14.so.14.1
2641
Version 1.4.1beta02 [January 9, 2010]
2642
Revised the rest of the makefiles to install a link to libpng14.so.14.1
2644
Version 1.4.1beta03 [January 10, 2010]
2645
Removed png_set_premultiply_alpha() from scripts/*.def
2647
Version 1.4.1rc01 [January 16, 2010]
2650
Version 1.4.1beta04 [January 23, 2010]
2651
Revised png_decompress_chunk() to improve speed and memory usage when
2652
decoding large chunks.
2653
Added png_set|get_chunk_malloc_max() functions.
2655
Version 1.4.1beta05 [January 26, 2010]
2656
Relocated "int k" declaration in pngtest.c to minimize its scope.
2658
Version 1.4.1beta06 [January 28, 2010]
2659
Revised png_decompress_chunk() to use a two-pass method suggested by
2662
Version 1.4.1beta07 [February 6, 2010]
2663
Folded some long lines in the source files.
2664
Added definable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,
2665
and a PNG_USER_LIMITS_SUPPORTED flag.
2666
Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as
2667
png_ptr->png_user_chunk_malloc_max.
2668
Revised png_push_save_buffer() to do fewer but larger png_malloc() calls.
2670
Version 1.4.1beta08 [February 6, 2010]
2671
Minor cleanup and updating of dates and copyright year.
2673
Version 1.5.0beta01 [February 7, 2010]
2674
Moved declaration of png_struct into private pngstruct.h and png_info
2677
Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010]
2678
Reverted to original png_push_save_buffer() code.
2680
Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010]
2681
Return allocated "old_buffer" in png_push_save_buffer() before
2682
calling png_error(), to avoid a potential memory leak.
2683
Updated configure script to use SO number 15.
2685
Version 1.5.0beta04 [February 9, 2010]
2686
Removed malformed "incomplete struct declaration" of png_info from png.h
2688
Version 1.5.0beta05 [February 12, 2010]
2689
Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the
2690
linewrapping that it entailed.
2691
Revised comments in pngstruct.h and pnginfo.h and added pointers to
2693
Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES
2694
Removed the cbuilder5 project, which has not been updated to 1.4.0.
2696
Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]
2697
Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke
2700
Version 1.5.0beta07 [omitted]
2702
Version 1.5.0beta08 [February 19, 2010]
2703
Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED
2704
wherever png_snprintf() is used to construct error and warning messages.
2705
Noted in scripts/makefile.mingw that it expects to be run under MSYS.
2706
Removed obsolete unused MMX-querying support from contrib/gregbook
2707
Added exported png_longjmp() function.
2708
Removed the AIX redefinition of jmpbuf in png.h
2709
Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt
2710
when building on AIX.
2712
Version 1.5.0beta09 [February 19, 2010]
2713
Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.
2714
Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h
2716
Version 1.5.0beta10 [February 25, 2010]
2717
Removed unused gzio.c from contrib/pngminim gather and makefile scripts
2718
Removed replacement error handlers from contrib/gregbook. Because of
2719
the new png_longjmp() function they are no longer needed.
2721
Version 1.5.0beta11 [March 6, 2010]
2722
Removed checking for already-included setjmp.h from pngconf.h
2723
Fixed inconsistent indentations and made numerous cosmetic changes.
2724
Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
2726
Version 1.5.0beta12 [March 9, 2010]
2727
Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from
2728
the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES"
2729
and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler).
2730
Created new pngdebug.h and moved debug definitions there.
2732
Version 1.5.0beta13 [March 10, 2010]
2733
Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
2734
Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
2735
PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
2737
Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
2738
Moved the 'config.h' support from pngconf.h to pngpriv.h
2739
Removed PNGAPI from the png_longjmp_ptr typedef.
2740
Eliminated dependence of pngtest.c on the private pngdebug.h file.
2741
Make all png_debug macros into *unterminated* statements or
2742
expressions (i.e. a trailing ';' must always be added) and correct
2743
the format statements in various png_debug messages.
2745
Version 1.5.0beta14 [March 14, 2010]
2746
Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
2747
Revised Makefile.am to account for recent additions and replacements.
2748
Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and
2749
added ordinal numbers to the Windows DEF file and corrected the duplicated
2750
ordinal numbers on CE symbols that are commented out.
2751
Added back in export symbols that can be present in the Windows build but
2752
are disabled by default.
2753
PNG_EXPORT changed to include an 'ordinal' field for DEF file generation.
2754
PNG_CALLBACK added to make callback definitions uniform. PNGAPI split
2755
into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks),
2756
and appropriate changes made to all files. Cygwin builds re-hinged to
2757
allow procedure call standard changes and to remove the need for the DEF
2758
file (fixes build on Cygwin).
2759
Enabled 'attribute' warnings that are relevant to library APIs and callbacks.
2760
Changed rules for generation of the various symbol files and added a new
2761
rule for a DEF file (which is also added to the distribution).
2762
Updated the symbol file generation to stop it adding spurious spaces
2763
to EOL (coming from preprocessor macro expansion). Added a facility
2764
to join tokens in the output and rewrite *.dfn to use this.
2765
Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71
2766
and removed scripts/makefile.cygwin.
2767
Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built.
2768
Removed the include of sys/types.h - apparently unnecessary now on the
2769
platforms on which it happened (all but Mac OS and RISC OS).
2770
Moved the Mac OS test into pngpriv.h (the only place it is used.)
2772
Version 1.5.0beta15 [March 17, 2010]
2773
Added symbols.chk target to Makefile.am to validate the symbols in png.h
2774
against the new DEF file scripts/symbols.def.
2775
Changed the default DEF file back to pngwin.def.
2776
Removed makefile.mingw.
2777
Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
2779
Version 1.5.0beta16 [April 1, 2010]
2780
Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that
2781
fields are initialized in all configurations. The READ/WRITE
2782
macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as
2783
before to disable code to actually read or write iTXt chunks
2784
and iTXt_SUPPORTED can be used to detect presence of either
2785
read or write support (but it is probably better to check for
2786
the one actually required - read or write.)
2787
Combined multiple png_warning() calls for a single error.
2788
Restored the macro definition of png_check_sig().
2790
Version 1.5.0beta17 [April 17, 2010]
2791
Added some "(long)" typecasts to printf calls in png_handle_cHRM().
2792
Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
2793
Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
2794
more accurately what it actually does. At the same time, renamed
2795
the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
2796
PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
2797
Added some "(long)" typecasts to printf calls in png_handle_cHRM().
2798
Freeze build-time only configuration in the build.
2799
In all prior versions of libpng most configuration options
2800
controlled by compiler #defines had to be repeated by the
2801
application code that used libpng. This patch changes this
2802
so that compilation options that can only be changed at build
2803
time are frozen in the build. Options that are compiler
2804
dependent (and those that are system dependent) are evaluated
2805
each time - pngconf.h holds these. Options that can be changed
2806
per-file in the application are in png.h. Frozen options are
2807
in the new installed header file pnglibconf.h (John Bowler)
2808
Removed the xcode project because it has not been updated to work
2810
Removed the ability to include optional pngusr.h
2812
Version 1.5.0beta18 [April 17, 2010]
2813
Restored the ability to include optional pngusr.h
2814
Moved replacements for png_error() and png_warning() from the
2815
contrib/pngminim project to pngerror.c, for use when warnings or
2816
errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
2817
storing unneeded error/warning text.
2818
Updated contrib/pngminim project to work with the new pnglibconf.h
2819
Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
2821
Version 1.5.0beta19 [April 24, 2010]
2822
Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions2823
to read and write ints to be disabled independently of PNG_USE_READ_MACROS,
2824
which allows libpng to be built with the functions even though the default
2825
is to use the macros - this allows applications to choose at app build
2826
time whether or not to use macros (previously impossible because the
2827
functions weren't in the default build.)
2828
Changed Windows calling convention back to __cdecl for API functions.
2829
For Windows/x86 platforms only:
2830
__stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses
2831
__cdecl throughout (both API functions and callbacks) on Windows/x86
2833
Replaced visualc6 and visualc71 projects with new vstudio project
2834
Relaxed the overly-restrictive permissions of some files.
2836
Version 1.5.0beta20 [April 24, 2010]
2837
Relaxed more overly-restrictive permissions of some files.
2839
Version 1.5.0beta21 [April 27, 2010]
2840
Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new
2841
vstudio project files, and some trivial editing of some files in the
2843
Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in
2844
contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
2846
Version 1.5.0beta22 [April 28, 2010]
2847
Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS
2848
because it has a macro equivalent.
2849
Improved the options.awk script; added an "everything off" option.
2850
Revised contrib/pngminim to use the "everything off" option in pngusr.dfa.
2852
Version 1.5.0beta23 [April 29, 2010]
2853
Corrected PNG_REMOVED macro to take five arguments.
2854
The macro was documented with two arguments (name,ordinal), however
2855
the symbol checking .dfn files assumed five arguments. The five
2856
argument form seems more useful so it is changed to that.
2857
Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED
2858
in gregbook/readpng2.c
2859
Corrected protection of png_get_user_transform_ptr. The API declaration in
2860
png.h is removed if both READ and WRITE USER_TRANSFORM are turned off
2861
but was left defined in pngtrans.c
2862
Added logunsupported=1 to cause pnglibconf.h to document disabled options.
2863
This makes the installed pnglibconf.h more readable but causes no
2864
other change. The intention is that users of libpng will find it
2865
easier to understand if an API they need is missing.
2866
Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
2867
Removed dummy_inflate.c from contrib/pngminim/encoder
2868
Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile.
2870
Version 1.5.0beta24 [May 7, 2010]
2871
Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the
2872
offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.
2873
Added more blank lines for readability.
2875
Version 1.5.0beta25 [June 18, 2010]
2876
In pngpread.c: png_push_have_row() add check for new_row > height
2877
Removed the now-redundant check for out-of-bounds new_row from example.c
2879
Version 1.5.0beta26 [June 18, 2010]
2880
In pngpread.c: png_push_process_row() add check for too many rows.
2882
Version 1.5.0beta27 [June 18, 2010]
2883
Removed the check added in beta25 as it is now redundant.
2885
Version 1.5.0beta28 [June 20, 2010]
2886
Rewrote png_process_IDAT_data to consistently treat extra data as warnings
2887
and handle end conditions more cleanly.
2888
Removed the new (beta26) check in png_push_process_row().
2890
Version 1.5.0beta29 [June 21, 2010]
2891
Revised scripts/options.awk to work on Sunos (but still doesn't work)
2892
Added comment to options.awk and contrib/pngminim/*/makefile to try nawk.
2894
Version 1.5.0beta30 [June 22, 2010]
2895
Stop memory leak when reading a malformed sCAL chunk.
2897
Version 1.5.0beta31 [June 26, 2010]
2898
Revised pngpread.c patch of beta28 to avoid an endless loop.
2899
Removed some trailing blanks.
2901
Version 1.5.0beta32 [June 26, 2010]
2902
Removed leftover scripts/options.patch and scripts/options.rej
2904
Version 1.5.0beta33 [July 6, 3010]
2905
Made FIXED and FLOATING options consistent in the APIs they enable and
2906
disable. Corrected scripts/options.awk to handle both command line
2907
options and options specified in the .dfa files.
2908
Changed char *msg to PNG_CONST char *msg in pngrutil.c
2909
Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or
2910
floating point APIs, but not both.
2911
Reversed patch to remove error handler when the jmp_buf is stored in the
2912
main program structure, not the png_struct.
2913
The error handler is needed because the default handler in libpng will
2914
always use the jmp_buf in the library control structure; this is never
2915
set. The gregbook code is a useful example because, even though it
2916
uses setjmp/longjmp, it shows how error handling can be implemented
2917
using control mechanisms not directly supported by libpng. The
2918
technique will work correctly with mechanisms such as Microsoft
2919
Structure Exceptions or C++ exceptions (compiler willing - note that gcc
2920
does not by default support interworking of C and C++ error handling.)
2921
Reverted changes to call png_longjmp in contrib/gregbook where it is not
2922
appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp
2924
Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)
2925
Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')2927
Version 1.5.0beta34 [July 12, 2010]
2928
Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h
2930
Version 1.5.0beta35 [July 24, 2010]
2931
Removed some newly-added TAB characters.
2932
Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
2933
Moved the definition of png_snprintf() outside of the enclosing
2934
#ifdef blocks in pngconf.h
2936
Version 1.5.0beta36 [July 29, 2010]
2937
Patches by John Bowler:
2938
Fixed point APIs are now supported throughout (no missing APIs).
2939
Internal fixed point arithmetic support exists for all internal floating
2941
sCAL validates the floating point strings it is passed.
2942
Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2
2943
Two new APIs exist to get the number of passes without turning on the
2944
PNG_INTERLACE transform and to get the number of rows in the current
2946
A new test program, pngvalid.c, validates the gamma code.
2947
Errors in the 16-bit gamma correction (overflows) have been corrected.
2948
cHRM chunk testing is done consistently (previously the floating point
2949
API bypassed it, because the test really didn't work on FP, now the test
2950
is performed on the actual values to be stored in the PNG file so it
2951
works in the FP case too.)
2952
Most floating point APIs now simply call the fixed point APIs after
2953
converting the values to the fixed point form used in the PNG file.
2954
The standard headers no longer include zlib.h, which is currently only
2955
required for pngstruct.h and can therefore be internal.
2956
Revised png_get_int_32 to undo the PNG two's complement representation of
2959
Version 1.5.0beta37 [July 30, 2010]
2960
Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid
2962
Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
2964
Version 1.5.0beta38 [July 31, 2010]
2965
Implemented remaining "_fixed" functions.
2966
Corrected a number of recently introduced warnings mostly resulting from
2967
safe but uncast assignments to shorter integers. Also added a zlib
2968
VStudio release library project because the latest zlib Official Windows
2969
build does not include such a thing.
2970
Revised png_get_int_16() to be similar to png_get_int_32().
2971
Restored projects/visualc71.
2973
Version 1.5.0beta39 [August 2, 2010]
2974
VisualC/GCC warning fixes, VisualC build fixes
2975
The changes include support for function attributes in VC in addition to
2976
those already present in GCC - necessary because without these some
2977
warnings are unavoidable. Fixes include signed/unsigned fixes in
2978
pngvalid and checks with gcc -Wall -Wextra -Wunused.
2979
VC requires function attributes on function definitions as well as
2980
declarations, PNG_FUNCTION has been added to enable this and the
2981
relevant function definitions changed.
2983
Version 1.5.0beta40 [August 6, 2010]
2984
Correct use of _WINDOWS_ in pngconf.h
2985
Removed png_mem_ #defines; they are no longer used.
2986
Added the sRGB chunk to pngtest.png
2988
Version 1.5.0beta41 [August 11, 2010]
2989
Added the cHRM chunk to pngtest.png
2990
Don't try to use version-script with cygwin/mingw.
2991
Revised contrib/gregbook to work under cygwin/mingw.
2993
Version 1.5.0beta42 [August 18, 2010]
2994
Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
2995
Made all API functions that have const arguments and constant string
2996
literal pointers declare them (John Bowler).
2998
Version 1.5.0beta43 [August 20, 2010]
2999
Removed spurious tabs, shorten long lines (no source change)
3000
Also added scripts/chkfmt to validate the format of all the files that can
3001
reasonably be validated (it is suggested to run "make distclean" before
3002
checking, because some machine generated files have long lines.)
3003
Reformatted the CHANGES file to be more consistent throughout.
3004
Made changes to address various issues identified by GCC, mostly
3005
signed/unsigned and shortening problems on assignment but also a few
3006
difficult to optimize (for GCC) loops.
3007
Fixed non-GCC fixed point builds. In png.c a declaration was misplaced
3008
in an earlier update. Fixed to declare the auto variables at the head.
3009
Use cexcept.h in pngvalid.c.
3011
Version 1.5.0beta44 [August 24, 2010]
3012
Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
3013
installing libpng in /usr/lib64 (Funda Wang).
3014
Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
3015
Revised CMakeLists.txt to make symlinks instead of copies when installing.
3016
Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)
3017
Implemented memory checks within pngvalid
3018
Reformatted/rearranged pngvalid.c to assist use of progressive reader.
3019
Check interlaced images in pngvalid
3020
Clarified pngusr.h comments in pnglibconf.dfa
3021
Simplified the pngvalid error-handling code now that cexcept.h is in place.
3022
Implemented progressive reader in pngvalid.c for standard tests
3023
Implemented progressive read in pngvalid.c gamma tests
3024
Turn on progressive reader in pngvalid.c by default and tidy code.
3026
Version 1.5.0beta45 [August 26, 2010]
3027
Added an explicit make step to projects/vstudio for pnglibconf.h
3028
Also corrected zlib.vcxproj into which Visual Studio had introduced
3029
what it calls an "authoring error". The change to make pnglibconf.h
3030
simply copies the file; in the future it may actually generate the
3031
file from scripts/pnglibconf.dfa as the other build systems do.
3032
Changed pngvalid to work when floating point APIs are disabled
3033
Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt
3034
Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX
3035
in pngpriv.h in case the user neglected to define them in their pngusr.h
3037
Version 1.5.0beta46 [August 28, 2010]
3038
Added new private header files to libpng_sources in CMakeLists.txt
3039
Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options.
3040
Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project.
3042
Version 1.5.0beta47 [September 11, 2010]
3043
Fixed a number of problems with 64-bit compilation reported by Visual
3044
Studio 2010 (John Bowler).
3046
Version 1.5.0beta48 [October 4, 2010]
3047
Updated CMakeLists.txt (Philip Lowman).
3048
Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
3049
$AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
3050
Fixed problem with symbols creation in Makefile.am which was assuming that
3051
all versions of ccp write to standard output by default (Martin Banky). The
3052
bug was introduced in libpng-1.2.9beta5.
3053
Removed unused mkinstalldirs.
3055
Version 1.5.0beta49 [October 8, 2010]
3056
Undid Makefile.am revision of 1.5.0beta48.
3058
Version 1.5.0beta50 [October 14, 2010]
3059
Revised Makefile.in to account for mkinstalldirs being removed.
3060
Added some "(unsigned long)" typecasts in printf statements in pngvalid.c.
3061
Suppressed a compiler warning in png_handle_sPLT().
3062
Check for out-of-range text compression mode in png_set_text().
3064
Version 1.5.0beta51 [October 15, 2010]
3065
Changed embedded dates to "(PENDING RELEASE) in beta releases (and future
3066
rc releases) to minimize the difference between releases.
3068
Version 1.5.0beta52 [October 16, 2010]
3069
Restored some of the embedded dates (in png.h, png.c, documentation, etc.)
3071
Version 1.5.0beta53 [October 18, 2010]
3072
Updated INSTALL to mention using "make maintainer-clean" and to remove
3073
obsolete statement about a custom ltmain.sh
3074
Disabled "color-tests" by default in Makefile.am so it will work with
3075
automake versions earlier than 1.11.1
3076
Use document name "libpng-manual.txt" instead of "libpng-<version>.txt"
3077
to simplify version differences.
3078
Removed obsolete remarks about setjmp handling from INSTALL.
3079
Revised and renamed the typedef in png.h and png.c that was designed
3080
to catch library and header mismatch.
3082
Version 1.5.0beta54 [November 10, 2010]
3083
Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.
3084
Used a consistent structure for the pngget.c functions.
3086
Version 1.5.0beta55 [November 21, 2010]
3087
Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
3088
Moved reading of file signature into png_read_sig (Cosmin)
3089
Fixed atomicity of chunk header serialization (Cosmin)
3090
Added test for io_state in pngtest.c (Cosmin)
3091
Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.
3092
Changes to remove gcc warnings (John Bowler)
3093
Certain optional gcc warning flags resulted in warnings in libpng code.
3094
With these changes only -Wconversion and -Wcast-qual cannot be turned on.
3095
Changes are trivial rearrangements of code. -Wconversion is not possible
3096
for pngrutil.c (because of the widespread use of += et al on variables
3097
smaller than (int) or (unsigned int)) and -Wcast-qual is not possible
3098
with pngwio.c and pngwutil.c because the 'write' callback and zlib
3099
compression both fail to declare their input buffers with 'const'.
3101
Version 1.5.0beta56 [December 7, 2010]
3102
Added the private PNG_UNUSED() macro definition in pngpriv.h.
3103
Added some commentary about PNG_EXPORT in png.h and pngconf.h
3104
Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the
3105
objective of simplifying and improving the cosmetic appearance of png.h.
3106
Fixed some incorrect "=" macro names in pnglibconf.dfa
3107
Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt
3109
Version 1.5.0beta57 [December 9, 2010]
3110
Documented the pngvalid gamma error summary with additional comments and
3112
Improved missing symbol handling in checksym.awk; symbols missing in both
3113
the old and new files can now be optionally ignored, treated as errors
3115
Removed references to pngvcrd.c and pnggccrd.c from the vstudio project.
3116
Updated "libpng14" to "libpng15" in the visualc71 project.
3117
Enabled the strip16 tests in pngvalid.`
3118
Don't display test results (except PASS/FAIL) when running "make test".
3119
Instead put them in pngtest-log.txt
3120
Added "--with-zprefix=<string>" to configure.ac
3121
Updated the prebuilt configuration files to autoconf version 2.68
3123
Version 1.5.0beta58 [December 19, 2010]
3124
Fixed interlace image handling and add test cases (John Bowler)
3125
Fixed the clean rule in Makefile.am to remove pngtest-log.txt
3126
Made minor changes to work around warnings in gcc 3.4
3128
Version 1.5.0rc01 [December 27, 2010]
3131
Version 1.5.0rc02 [December 27, 2010]
3132
Eliminated references to the scripts/*.def files in project/visualc71.
3134
Version 1.5.0rc03 [December 28, 2010]
3135
Eliminated scripts/*.def and revised Makefile.am accordingly
3137
Version 1.5.0rc04 [December 29, 2010]
3138
Fixed bug in background transformation handling in pngrtran.c (it was
3139
looking for the flag in png_ptr->transformations instead of in
3140
png_ptr->flags) (David Raymond).
3142
Version 1.5.0rc05 [December 31, 2010]
3143
Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin)
3145
Version 1.5.0rc06 [January 4, 2011]
3146
Changed the new configure option "zprefix=string" to "zlib-prefix=string"
3148
Version 1.5.0rc07 [January 4, 2011]
3149
Updated copyright year.
3151
Version 1.5.0 [January 6, 2011]
3154
version 1.5.1beta01 [January 8, 2011]
3155
Added description of png_set_crc_action() to the manual.
3156
Added a note in the manual that the type of the iCCP profile was changed
3157
from png_charpp to png_bytepp in png_get_iCCP(). This change happened
3158
in version 1.5.0beta36 but is not noted in the CHANGES. Similarly,
3159
it was changed from png_charpp to png_const_bytepp in png_set_iCCP().
3160
Ensure that png_rgb_to_gray ignores palette mapped images, if libpng
3161
internally happens to call it with one, and fixed a failure to handle
3162
palette mapped images correctly. This fixes CVE-2690.
3164
Version 1.5.1beta02 [January 14, 2011]
3165
Fixed a bug in handling of interlaced images (bero at arklinux.org).
3166
Updated CMakeLists.txt (Clifford Yapp)
3168
Version 1.5.1beta03 [January 14, 2011]
3169
Fixed typecasting of some png_debug() statements (Cosmin)
3171
Version 1.5.1beta04 [January 16, 2011]
3172
Updated documentation of png_set|get_tRNS() (Thomas Klausner).
3173
Mentioned in the documentation that applications must #include "zlib.h"
3174
if they need access to anything in zlib.h, and that a number of
3175
macros such as png_memset() are no longer accessible by applications.
3176
Corrected pngvalid gamma test "sample" function to access all of the color
3177
samples of each pixel, instead of sampling the red channel three times.
3178
Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow"
3179
warnings, and (mistakenly) changed png_exp() to exp().
3181
Version 1.5.1beta05 [January 16, 2011]
3182
Changed variable names png_index, png_div, png_exp, and png_gamma to
3183
char_index, divisor, exp_b10, and gamma_val, respectively, and
3184
changed exp() back to png_exp().
3186
Version 1.5.1beta06 [January 20, 2011]
3187
Prevent png_push_crc_skip() from hanging while reading an unknown chunk
3188
or an over-large compressed zTXt chunk with the progressive reader.
3189
Eliminated more GCC "shadow" warnings.
3190
Revised png_fixed() in png.c to avoid compiler warning about reaching the
3191
end without returning anything.
3193
Version 1.5.1beta07 [January 22, 2011]
3194
In the manual, describe the png_get_IHDR() arguments in the correct order.
3195
Added const_png_structp and const_png_infop types, and used them in
3196
prototypes for most png_get_*() functions.
3198
Version 1.5.1beta08 [January 23, 2011]
3199
Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name()
3200
Added synopses for the IO_STATE functions and other missing synopses
3201
to the manual. Removed the synopses from libpngpf.3 because they
3202
were out of date and no longer useful. Better information can be
3203
obtained by reading the prototypes and comments in pngpriv.h
3204
Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build
3205
Added a make macro DFNCPP that is a CPP that will accept the tokens in
3206
a .dfn file and adds configure stuff to test for such a CPP. ./configure
3207
should fail if one is not available.
3208
Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace.
3209
Added png_get_current_row_number and png_get_current_pass_number for the
3210
benefit of the user transform callback.
3211
Added png_process_data_pause and png_process_data_skip for the benefit of
3212
progressive readers that need to stop data processing or want to optimize
3213
skipping of unread data (e.g., if the reader marks a chunk to be skipped.)
3215
Version 1.5.1beta09 [January 24, 2011]
3216
Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error.
3217
pngvalid contains tests of transforms, which tests are currently disabled
3218
because they are incompletely tested. gray_to_rgb was failing to expand
3219
the bit depth for smaller bit depth images; this seems to be a long
3220
standing error and resulted, apparently, in invalid output
3221
(CVE-2011-0408, CERT VU#643140). The documentation did not accurately
3222
describe what libpng really does when converting RGB to gray.
3224
Version 1.5.1beta10 [January 27, 2010]
3225
Fixed incorrect examples of callback prototypes in the manual, that were
3226
introduced in libpng-1.0.0.
3227
In addition the order of the png_get_uint macros with respect to the
3228
relevant function definitions has been reversed. This helps the
3229
preprocessing of the symbol files be more robust. Furthermore, the
3230
symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when
3231
the library may actually be built with PNG_USE_READ_MACROS; this stops
3232
the read macros interfering with the symbol file format.
3233
Made the manual, synopses, and function prototypes use the function
3234
argument names file_gamma, int_file_gamma, and srgb_intent consistently.
3236
Version 1.5.1beta11 [January 28, 2011]
3237
Changed PNG_UNUSED from "param=param;" to "{if(param){}}".3238
Corrected local variable type in new API png_process_data_skip()
3239
The type was self-evidently incorrect but only causes problems on 64-bit
3241
Added transform tests to pngvalid and simplified the arguments.
3243
Version 1.5.1rc01 [January 29, 2011]
3246
Version 1.5.1rc02 [January 31, 2011]
3247
Added a request in the manual that applications do not use "png_" or
3248
"PNG_" to begin any of their own symbols.
3249
Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h
3251
Version 1.5.1 [February 3, 2011]
3254
Version 1.5.2beta01 [February 13, 2011]
3255
More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
3256
check formal parameters names in function declarations (as well as
3257
definitions) to see if they match a name in the global namespace.
3258
Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
3259
old VisualC++ preprocessor.
3260
Turned on interlace handling in png_read_png().
3261
Fixed gcc pedantic warnings.
3262
Handle longjmp in Cygwin.
3263
Fixed png_get_current_row_number() in the interlaced case.
3264
Cleaned up ALPHA flags and transformations.
3265
Implemented expansion to 16 bits.
3267
Version 1.5.2beta02 [February 19, 2011]
3268
Fixed mistake in the descriptions of user read_transform and write_transform
3269
function prototypes in the manual. The row_info struct is png_row_infop.
3270
Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior.
3271
Corrected png_get_current_row_number documentation
3272
Fixed the read/write row callback documentation.
3273
This documents the current behavior, where the callback is called after
3274
every row with information pertaining to the next row.
3276
Version 1.5.2beta03 [March 3, 2011]
3277
Fixed scripts/makefile.vcwin32
3278
Updated contrib/pngsuite/README to add the word "modify".
3279
Define PNG_ALLOCATED to blank when _MSC_VER<1300.
3281
Version 1.5.2rc01 [March 19, 2011]
3282
Define remaining attributes to blank when MSC_VER<1300.
3283
ifdef out mask arrays in pngread.c when interlacing is not supported.
3285
Version 1.5.2rc02 [March 22, 2011]
3286
Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
3287
and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
3289
Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
3290
to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
3292
Version 1.5.2rc03 [March 24, 2011]
3293
Don't include standard header files in png.h while building the symbol table,
3294
to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
3296
Version 1.5.2 [March 31, 2011]
3299
Version 1.5.3beta01 [April 1, 2011]
3300
Re-initialize the zlib compressor before compressing non-IDAT chunks.
3301
Added API functions (png_set_text_compression_level() and four others) to
3302
set parameters for zlib compression of non-IDAT chunks.
3304
Version 1.5.3beta02 [April 3, 2011]
3305
Updated scripts/symbols.def with new API functions.
3306
Only compile the new zlib re-initializing code when text or iCCP is
3307
supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro.
3308
Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03).
3309
Optimize the zlib CMF byte in non-IDAT compressed chunks
3311
Version 1.5.3beta03 [April 16, 2011]
3312
Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have
3313
snprintf, and the "__STRICT_ANSI__" detects that condition more reliably
3314
than __STDC__ (John Bowler).
3315
Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells
3316
the compiler that a user supplied callback (the error handler) does not
3317
return, yet there is no guarantee in practice that the application code
3318
will correctly implement the error handler because the compiler only
3319
issues a warning if there is a mistake (John Bowler).
3320
Removed the no-longer-used PNG_DEPSTRUCT macro.
3321
Updated the zlib version to 1.2.5 in the VStudio project.
3322
Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in
3323
pngwutil.c (John Bowler).
3324
Fixed bug with stripping the filler or alpha channel when writing, that
3325
was introduced in libpng-1.5.2beta01 (bug report by Andrew Church).
3327
Version 1.5.3beta04 [April 27, 2011]
3328
Updated pngtest.png with the new zlib CMF optimization.
3329
Cleaned up conditional compilation code and of background/gamma handling
3330
Internal changes only except a new option to avoid compiling the
3331
png_build_grayscale_palette API (which is not used at all internally.)
3332
The main change is to move the transform tests (READ_TRANSFORMS,
3333
WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids
3334
calls to spurious functions if all transforms are disabled and slightly
3335
simplifies those functions. Pngvalid modified to handle this.
3336
A minor change is to stop the strip_16 and expand_16 interfaces from
3337
disabling each other; this allows the future alpha premultiplication
3338
code to use 16-bit intermediate values while still producing 8-bit output.
3339
png_do_background and png_do_gamma have been simplified to take a single
3340
pointer to the png_struct rather than pointers to every item required
3341
from the png_struct. This makes no practical difference to the internal
3343
A serious bug in the pngvalid internal routine 'standard_display_init' has
3344
been fixed - this failed to initialize the red channel and accidentally
3345
initialized the alpha channel twice.
3346
Changed png_struct jmp_buf member name from png_jmpbuf to tmp_jmpbuf to
3347
avoid a possible clash with the png_jmpbuf macro on some platforms.
3349
Version 1.5.3beta05 [May 6, 2011]
3350
Added the "_POSIX_SOURCE" feature test macro to ensure libpng sees the
3351
correct API. _POSIX_SOURCE is defined in pngpriv.h, pngtest.c and
3352
pngvalid.c to ensure that POSIX conformant systems disable non-POSIX APIs.
3353
Removed png_snprintf and added formatted warning messages. This change adds
3354
internal APIs to allow png_warning messages to have parameters without
3355
requiring the host OS to implement snprintf. As a side effect the
3356
dependency of the tIME-supporting RFC1132 code on stdio is removed and
3357
PNG_NO_WARNINGS does actually work now.
3358
Pass "" instead of '\0' to png_default_error() in png_err(). This mistake
3359
was introduced in libpng-1.2.20beta01. This fixes CVE-2011-2691.
3360
Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte
3361
optimization configurable.
3362
IDAT compression failed if preceded by a compressed text chunk (bug
3363
introduced in libpng-1.5.3beta01-02). This was because the attempt to
3364
reset the zlib stream in png_write_IDAT happened after the first IDAT
3365
chunk had been deflated - much too late. In this change internal
3366
functions were added to claim/release the z_stream and, hopefully, make
3367
the code more robust. Also deflateEnd checking is added - previously
3368
libpng would ignore an error at the end of the stream.
3370
Version 1.5.3beta06 [May 8, 2011]
3371
Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt
3372
Implemented premultiplied alpha support: png_set_alpha_mode API
3374
Version 1.5.3beta07 [May 11, 2011]
3375
Added expand_16 support to the high level interface.
3376
Added named value and 'flag' gamma support to png_set_gamma. Made a minor
3377
change from the previous (unreleased) ABI/API to hide the exact value used
3378
for Macs - it's not a good idea to embed this in the ABI!
3379
Moved macro definitions for PNG_HAVE_IHDR, PNG_HAVE_PLTE, and PNG_AFTER_IDAT
3380
from pngpriv.h to png.h because they must be visible to applications
3381
that call png_set_unknown_chunks().
3382
Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
3385
Version 1.5.3beta08 [May 16, 2011]
3386
Improved "pngvalid --speed" to exclude more of pngvalid from the time.
3387
Documented png_set_alpha_mode(), other changes in libpng.3/libpng-manual.txt
3388
The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative
3389
parameters are supplied by the caller), while in the absence of cHRM
3390
sRGB/Rec 709 values are still used. This introduced a divide-by-zero
3391
bug in png_handle_cHRM().
3392
The bKGD chunk no longer overwrites the background value set by
3393
png_set_background(), allowing the latter to be used before the file
3394
header is read. It never performed any useful function to override
3396
Added memory overwrite and palette image checks to pngvalid.c
3397
Previously palette image code was poorly checked. Since the transformation
3398
code has a special palette path in most cases this was a severe weakness.
3399
Minor cleanup and some extra checking in pngrutil.c and pngrtran.c. When
3400
expanding an indexed image, always expand to RGBA if transparency is
3403
Version 1.5.3beta09 [May 17, 2011]
3404
Reversed earlier 1.5.3 change of transformation order; move png_expand_16
3405
back where it was. The change doesn't work because it requires 16-bit
3406
gamma tables when the code only generates 8-bit ones. This fails
3407
silently; the libpng code just doesn't do any gamma correction. Moving
3408
the tests back leaves the old, inaccurate, 8-bit gamma calculations, but
3409
these are clearly better than none!
3411
Version 1.5.3beta10 [May 20, 2011]
3413
png_set_background() and png_expand_16() did not work together correctly.
3414
This problem is present in 1.5.2; if png_set_background is called with
3415
need_expand false and the matching 16 bit color libpng erroneously just
3416
treats it as an 8-bit color because of where png_do_expand_16 is in the
3417
transform list. This simple fix reduces the supplied colour to 8-bits,
3418
so it gets smashed, but this is better than the current behavior.
3419
Added tests for expand16, more fixes for palette image tests to pngvalid.
3420
Corrects the code for palette image tests and disables attempts to
3421
validate palette colors.
3423
Version 1.5.3rc01 [June 3, 2011]
3426
Version 1.5.3rc02 [June 8, 2011]
3427
Fixed uninitialized memory read in png_format_buffer() (Bug report by
3428
Frank Busse, CVE-2011-2501, related to CVE-2004-0421).
3430
Version 1.5.3beta11 [June 11, 2011]
3431
Fixed png_handle_sCAL which is broken in 1.5. This fixes CVE 2011-2692.
3432
Added sCAL to pngtest.png
3433
Revised documentation about png_set_user_limits() to say that it also affects
3435
Revised handling of png_set_user_limits() so that it can increase the
3436
limit beyond the PNG_USER_WIDTH|HEIGHT_MAX; previously it could only
3438
Make the 16-to-8 scaling accurate. Dividing by 256 with no rounding is
3439
wrong (high by one) 25% of the time. Dividing by 257 with rounding is
3440
wrong in 128 out of 65536 cases. Getting the right answer all the time
3441
without division is easy.
3442
Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro.
3443
Added projects/owatcom, an IDE project for OpenWatcom to replace
3444
scripts/makefile.watcom. This project works with OpenWatcom 1.9. The
3445
IDE autogenerates appropriate makefiles (libpng.mk) for batch processing.
3446
The project is configurable, unlike the Visual Studio project, so long
3447
as the developer has an awk.
3448
Changed png_set_gAMA to limit the gamma value range so that the inverse
3449
of the stored value cannot overflow the fixed point representation,
3450
and changed other things OpenWatcom warns about.
3451
Revised pngvalid.c to test PNG_ALPHA_MODE_SUPPORTED correctly. This allows
3452
pngvalid to build when ALPHA_MODE is not supported, which is required if
3453
it is to build on libpng 1.4.
3454
Removed string/memory macros that are no longer used and are not
3455
necessarily fully supportable, particularly png_strncpy and png_snprintf.
3456
Added log option to pngvalid.c and attempted to improve gamma messages.
3458
Version 1.5.3 [omitted]
3459
People found the presence of a beta release following an rc release
3460
to be confusing; therefore we bump the version to libpng-1.5.4beta01
3461
and there will be no libpng-1.5.3 release.
3463
Version 1.5.4beta01 [June 14, 2011]
3464
Made it possible to undefine PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
3465
to get the same (inaccurate) output as libpng-1.5.2 and earlier.
3466
Moved definitions of PNG_HAVE_IHDR, PNG_AFTER_IDAT, and PNG_HAVE_PLTE
3467
outside of an unknown-chunk block in png.h because they are also
3468
needed for other uses.
3470
Version 1.5.4beta02 [June 14, 2011]
3471
Fixed and clarified LEGACY 16-to-8 scaling code.
3472
Added png_set_chop_16() API, to match inaccurate results from previous
3474
Removed the ACCURATE and LEGACY options (they are no longer useable)
3475
Use the old scaling method for background if png_set_chop_16() was
3477
Made png_set_chop_16() API removeable by disabling PNG_CHOP_16_TO_8_SUPPORTED
3479
Version 1.5.4beta03 [June 15, 2011]
3480
Fixed a problem in png_do_expand_palette() exposed by optimization in
3482
Also removed a spurious and confusing "trans" member ("trans") from png_info.3483
The palette expand optimization prevented expansion to an intermediate RGBA
3484
form if tRNS was present but alpha was marked to be stripped; this exposed
3485
a check for tRNS in png_do_expand_palette() which is inconsistent with the
3486
code elsewhere in libpng.
3487
Correction to the expand_16 code; removed extra instance of
3488
png_set_scale_16_to_8 from pngpriv.h
3490
Version 1.5.4beta04 [June 16, 2011]
3491
Added a missing "#ifdef PNG_READ_BACKGROUND_SUPPORTED/#endif" in pngrtran.c
3492
Added PNG_TRANSFORM_CHOP_16 to the high-level read transforms.
3493
Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again. If this is
3494
not enabled, png_set_strip_16() and png_do_scale_16_to_8() aren't built.
3495
Revised contrib/visupng, gregbook, and pngminim to demonstrate chop_16_to_8
3497
Version 1.5.4beta05 [June 16, 2011]
3498
Renamed png_set_strip_16() to png_set_scale_16() and renamed
3499
png_set_chop_16() to png_set_strip(16) in an attempt to minimize the
3500
behavior changes between libpng14 and libpng15.
3502
Version 1.5.4beta06 [June 18, 2011]
3503
Fixed new bug that was causing both strip_16 and scale_16 to be applied.
3505
Version 1.5.4beta07 [June 19, 2011]
3506
Fixed pngvalid, simplified macros, added checking for 0 in sCAL.
3507
The ACCURATE scale macro is no longer defined in 1.5 - call the
3508
png_scale_16_to_8 API. Made sure that PNG_READ_16_TO_8 is still defined
3509
if the png_strip_16_to_8 API is present. png_check_fp_number now
3510
maintains some state so that positive, negative and zero values are
3511
identified. sCAL uses these to be strictly spec conformant.
3513
Version 1.5.4beta08 [June 23, 2011]
3514
Fixed pngvalid if ACCURATE_SCALE is defined.
3515
Updated scripts/pnglibconf.h.prebuilt.
3517
Version 1.5.4rc01 [June 30, 2011]
3518
Define PNG_ALLOCATED to "restrict" only if MSC_VER >= 1400.
3520
Version 1.5.4 [July 7, 2011]
3523
Version 1.5.5beta01 [July 13, 2011]
3524
Fixed some typos and made other minor changes in the manual.
3525
Updated contrib/pngminus/makefile.std (Samuli Souminen)
3527
Version 1.5.5beta02 [July 14, 2011]
3528
Revised Makefile.am and Makefile.in to look in the right directory for
3529
pnglibconf.h.prebuilt
3531
Version 1.5.5beta03 [July 27, 2011]
3532
Enabled compilation with g++ compiler. This compiler does not recognize
3533
the file extension, so it always compiles with C++ rules. Made minor
3534
changes to pngrutil.c to cast results where C++ expects it but C does not.
3535
Minor editing of libpng.3 and libpng-manual.txt.
3537
Version 1.5.5beta04 [July 29, 2011]
3538
Revised CMakeLists.txt (Clifford Yapp)
3539
Updated commentary about the png_rgb_to_gray() default coefficients
3540
in the manual and in pngrtran.c
3542
Version 1.5.5beta05 [August 17, 2011]
3543
Prevent unexpected API exports from non-libpng DLLs on Windows. The "_DLL"
3544
is removed from the test of whether a DLL is being built (this erroneously
3545
caused the libpng APIs to be marked as DLL exports in static builds under
3546
Microsoft Visual Studio). Almost all of the libpng building configuration
3547
is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in
3548
pngconf.h, though, so that it is colocated with the import definition (it
3549
is no longer used anywhere in the installed headers). The VStudio project
3550
definitions have been cleaned up: "_USRDLL" has been removed from the
3551
static library builds (this was incorrect), and PNG_USE_DLL has been added
3552
to pngvalid to test the functionality (pngtest does not supply it,
3553
deliberately). The spurious "_EXPORTS" has been removed from the
3554
libpng build (all these errors were a result of copy/paste between project
3556
Added new types and internal functions for CIE RGB end point handling to
3557
pngpriv.h (functions yet to be implemented).
3559
Version 1.5.5beta06 [August 26, 2011]
3560
Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set in CMakeLists.txt
3562
Fixes to rgb_to_gray and cHRM XYZ APIs (John Bowler):
3563
The rgb_to_gray code had errors when combined with gamma correction.
3564
Some pixels were treated as true grey when they weren't and such pixels
3565
and true grey ones were not gamma corrected (the original value of the
3566
red component was used instead). APIs to get and set cHRM using color
3567
space end points have been added and the rgb_to_gray code that defaults
3568
based on cHRM, and the divide-by-zero bug in png_handle_cHRM (CERT
3569
VU#477046, CVE-2011-3328, introduced in 1.5.4) have been corrected.
3570
A considerable number of tests has been added to pngvalid for the
3571
rgb_to_gray transform.
3572
Arithmetic errors in rgb_to_gray whereby the calculated gray value was
3573
truncated to the bit depth rather than rounded have been fixed except in
3574
the 8-bit non-gamma-corrected case (where consistency seems more important
3575
than correctness.) The code still has considerable inaccuracies in the
3576
8-bit case because 8-bit linear arithmetic is used.
3578
Version 1.5.5beta07 [September 7, 2011]
3579
Added "$(ARCH)" option to makefile.darwin
3580
Added SunOS support to configure.ac and Makefile.am
3581
Changed png_chunk_benign_error() to png_warning() in png.c, in
3582
png_XYZ_from_xy_checked().
3584
Version 1.5.5beta08 [September 10, 2011]
3585
Fixed 64-bit compilation errors (gcc). The errors fixed relate
3586
to conditions where types that are 32 bits in the GCC 32-bit
3587
world (uLong and png_size_t) become 64 bits in the 64-bit
3588
world. This produces potential truncation errors which the
3589
compiler correctly flags.
3590
Relocated new HAVE_SOLARIS_LD definition in configure.ac
3591
Constant changes for 64-bit compatibility (removal of L suffixes). The
3592
16-bit cases still use "L" as we don't have a 16-bit test system.
3594
Version 1.5.5rc01 [September 15, 2011]
3595
Removed "L" suffixes in pngpriv.h
3597
Version 1.5.5 [September 22, 2011]
3600
Version 1.5.6beta01 [September 22, 2011]
3601
Fixed some 64-bit type conversion warnings in pngrtran.c
3602
Moved row_info from png_struct to a local variable.
3603
The various interlace mask arrays have been made into arrays of
3604
bytes and made PNG_CONST and static (previously some arrays were
3605
marked PNG_CONST and some weren't).
3606
Additional checks have been added to the transform code to validate the
3607
pixel depths after the transforms on both read and write.
3608
Removed some redundant code from pngwrite.c, in png_destroy_write_struct().
3609
Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4].
3610
This removes the need to allocate temporary strings for chunk names on
3611
the stack in the read/write code. Unknown chunk handling still uses the
3612
string form because this is exposed in the API.
3614
Version 1.5.6beta02 [September 26, 2011]
3615
Added a note in the manual the png_read_update_info() must be called only
3616
once with a particular info_ptr.
3617
Fixed a typo in the definition of the new PNG_STRING_FROM_CHUNK(s,c) macro.
3619
Version 1.5.6beta03 [September 28, 2011]
3620
Revised test-pngtest.sh to report FAIL when pngtest fails.
3621
Added "--strict" option to pngtest, to report FAIL when the failure is
3622
only because the resulting valid files are different.
3623
Revised CMakeLists.txt to work with mingw and removed some material from
3624
CMakeLists.txt that is no longer useful in libpng-1.5.
3626
Version 1.5.6beta04 [October 5, 2011]
3627
Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")."3629
Version 1.5.6beta05 [October 12, 2011]
3630
Speed up png_combine_row() for interlaced images. This reduces the generality
3631
of the code, allowing it to be optimized for Adam7 interlace. The masks
3632
passed to png_combine_row() are now generated internally, avoiding
3633
some code duplication and localizing the interlace handling somewhat.
3634
Align png_struct::row_buf - previously it was always unaligned, caused by
3635
a bug in the code that attempted to align it; the code needs to subtract
3636
one from the pointer to take account of the filter byte prepended to
3638
Optimized png_combine_row() when rows are aligned. This gains a small
3639
percentage for 16-bit and 32-bit pixels in the typical case where the
3640
output row buffers are appropriately aligned. The optimization was not
3641
previously possible because the png_struct buffer was always misaligned.
3642
Fixed bug in png_write_chunk_header() debug print, introduced in 1.5.6beta01.
3644
Version 1.5.6beta06 [October 17, 2011]
3645
Removed two redundant tests for uninitialized row.
3646
Fixed a relatively harmless memory overwrite in compressed text writing
3647
with a 1 byte zlib buffer.
3648
Add ability to call png_read_update_info multiple times to pngvalid.c.
3649
Fixes for multiple calls to png_read_update_info. These fixes attend to
3650
most of the errors revealed in pngvalid, however doing the gamma work
3651
twice results in inaccuracies that can't be easily fixed. There is now
3652
a warning in the code if this is going to happen.
3653
Turned on multiple png_read_update_info in pngvalid transform tests.
3654
Prevent libpng from overwriting unused bits at the end of the image when
3655
it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would
3656
overwrite the partial byte at the end of each row if the row width was not
3657
an exact multiple of 8 bits and the image is not interlaced.
3659
Version 1.5.6beta07 [October 21, 2011]
3660
Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row
3663
Version 1.5.6rc01 [October 26, 2011]
3664
Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM"
3666
Version 1.5.6rc02 [October 27, 2011]
3667
Added LSR() macro to defend against buggy compilers that evaluate non-taken
3668
code branches and complain about out-of-range shifts.
3670
Version 1.5.6rc03 [October 28, 2011]
3671
Renamed the LSR() macro to PNG_LSR() and added PNG_LSL() macro.
3672
Fixed compiler warnings with Intel and MSYS compilers. The logical shift
3673
fix for Microsoft Visual C is required by other compilers, so this
3674
enables that fix for all compilers when using compile-time constants.
3675
Under MSYS 'byte' is a name declared in a system header file, so we
3676
changed the name of a local variable to avoid the warnings that result.
3677
Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h
3679
Version 1.5.6 [November 3, 2011]
3682
Version 1.5.7beta01 [November 4, 2011]
3683
Added support for ARM processor, when decoding all PNG up-filtered rows
3684
and any other-filtered rows with 3 or 4 bytes per pixel (Mans Rullgard).
3685
Fixed bug in pngvalid on early allocation failure; fixed type cast in
3686
pngmem.c; pngvalid would attempt to call png_error() if the allocation
3687
of a png_struct or png_info failed. This would probably have led to a
3688
crash. The pngmem.c implementation of png_malloc() included a cast
3689
to png_size_t which would fail on large allocations on 16-bit systems.
3690
Fix for the preprocessor of the Intel C compiler. The preprocessor
3691
splits adjacent @ signs with a space; this changes the concatenation
3692
token from @-@-@ to PNG_JOIN; that should work with all compiler
3694
Paeth filter speed improvements from work by Siarhei Siamashka. This
3695
changes the 'Paeth' reconstruction function to improve the GCC code
3696
generation on x86. The changes are only part of the suggested ones;
3697
just the changes that definitely improve speed and remain simple.
3698
The changes also slightly increase the clarity of the code.
3700
Version 1.5.7beta02 [November 11, 2011]
3701
Check compression_type parameter in png_get_iCCP and remove spurious
3702
casts. The compression_type parameter is always assigned to, so must
3703
be non-NULL. The cast of the profile length potentially truncated the
3704
value unnecessarily on a 16-bit int system, so the cast of the (byte)
3705
compression type to (int) is specified by ANSI-C anyway.
3706
Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left
3707
the sBIT fields in the test pixel as 0, which resulted in a floating
3708
point division by zero which was irrelevant but causes systems where
3709
FP exceptions cause a crash. Added code to pngvalid to turn on FP
3710
exceptions if the appropriate glibc support is there to ensure this is
3711
tested in the future.
3712
Updated scripts/pnglibconf.mak and scripts/makefile.std to handle the
3714
Added versioning to pnglibconf.h comments.
3715
Simplified read/write API initial version; basic read/write tested on
3716
a variety of images, limited documentation (in the header file.)
3717
Installed more accurate linear to sRGB conversion tables. The slightly
3718
modified tables reduce the number of 16-bit values that
3719
convert to an off-by-one 8-bit value. The "makesRGB.c" code that was used
3720
to generate the tables is now in a contrib/sRGBtables sub-directory.
3722
Version 1.5.7beta03 [November 17, 2011]
3723
Removed PNG_CONST from the sRGB table declarations in pngpriv.h and png.c
3724
Added run-time detection of NEON support.
3725
Added contrib/libtests; includes simplified API test and timing test and
3726
a color conversion utility for rapid checking of failed 'pngstest' results.
3727
Multiple transform bug fixes plus a work-round for double gamma correction.
3728
libpng does not support more than one transform that requires linear data
3729
at once - if this is tried typically the results is double gamma
3730
correction. Since the simplified APIs can need rgb to gray combined with
3731
a compose operation it is necessary to do one of these outside the main
3732
libpng transform code. This check-in also contains fixes to various bugs
3733
in the simplified APIs themselves and to some bugs in compose and rgb to
3734
gray (on palette) itself.
3735
Fixes for C++ compilation using g++ When libpng source is compiled
3736
using g++. The compiler imposes C++ rules on the C source; thus it
3737
is desirable to make the source work with either C or C++ rules
3738
without throwing away useful error information. This change adds
3739
png_voidcast to allow C semantic (void*) cases or the corresponding
3740
C++ static_cast operation, as appropriate.
3741
Added --noexecstack to assembler file compilation. GCC does not set
3742
this on assembler compilation, even though it does on C compilation.
3743
This creates security issues if assembler code is enabled; the
3744
work-around is to set it by default in the flags for $(CCAS)
3745
Work around compilers that don't support declaration of const data. Some
3746
compilers fault 'extern const' data declarations (because the data is
3747
not initialized); this turns on const-ness only for compilers where
3748
this is known to work.
3750
Version 1.5.7beta04 [November 17, 2011]
3751
Since the gcc driver does not recognize the --noexecstack flag, we must
3752
use the -Wa prefix to have it passed through to the assembler.
3753
Also removed a duplicate setting of this flag.
3754
Added files that were omitted from the libpng-1.5.7beta03 zip distribution.
3756
Version 1.5.7beta05 [November 25, 2011]
3757
Removed "zTXt" from warning in generic chunk decompression function.
3758
Validate time settings passed to png_set_tIME() and png_convert_to_rfc1123()
3759
(Frank Busse). Note: This prevented CVE-2015-7981 from affecting
3760
libpng-1.5.7 and later.
3761
Added MINGW support to CMakeLists.txt
3762
Reject invalid compression flag or method when reading the iTXt chunk.
3763
Backed out 'simplified' API changes. The API seems too complex and there
3764
is a lack of consensus or enthusiasm for the proposals. The API also
3765
reveals significant bugs inside libpng (double gamma correction and the
3766
known bug of being unable to retrieve a corrected palette). It seems
3767
better to wait until the bugs, at least, are corrected.
3768
Moved pngvalid.c into contrib/libtests
3769
Rebuilt Makefile.in, configure, etc., with autoconf-2.68
3771
Version 1.5.7rc01 [December 1, 2011]
3772
Replaced an "#if" with "#ifdef" in pngrtran.c
3773
Revised #if PNG_DO_BC block in png.c (use #ifdef and add #else)
3775
Version 1.5.7rc02 [December 5, 2011]
3776
Revised project files and contrib/pngvalid/pngvalid.c to account for
3777
the relocation of pngvalid into contrib/libtests.
3778
Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400,
3780
Put CRLF line endings in the owatcom project files.
3782
Version 1.5.7rc03 [December 7, 2011]
3783
Updated CMakeLists.txt to account for the relocation of pngvalid.c
3785
Version 1.5.7 [December 15, 2011]
3786
Minor fixes to pngvalid.c for gcc 4.6.2 compatibility to remove warnings
3787
reported by earlier versions.
3788
Fixed minor memset/sizeof errors in pngvalid.c.
3790
Version 1.6.0beta01 [December 15, 2011]
3791
Removed machine-generated configure files from the GIT repository (they will
3792
continue to appear in the tarball distributions and in the libpng15 and
3793
earlier GIT branches).
3794
Restored the new 'simplified' API, which was started in libpng-1.5.7beta02
3795
but later deleted from libpng-1.5.7beta05.
3796
Added example programs for the new 'simplified' API.
3797
Added ANSI-C (C90) headers and require them, and take advantage of the
3798
change. Also fixed some of the projects/* and contrib/* files that needed
3799
updates for libpng16 and the move of pngvalid.c.
3800
With this change the required ANSI-C header files are assumed to exist: the
3801
implementation must provide float.h, limits.h, stdarg.h and stddef.h and
3802
libpng relies on limits.h and stddef.h existing and behaving as defined
3803
(the other two required headers aren't used). Non-ANSI systems that don't
3804
have stddef.h or limits.h will have to provide an appropriate fake
3805
containing the relevant types and #defines.
3806
Dropped support for 16-bit platforms. The use of FAR/far has been eliminated
3807
and the definition of png_alloc_size_t is now controlled by a flag so
3808
that 'small size_t' systems can select it if necessary. Libpng 1.6 may
3809
not currently work on such systems -- it seems likely that it will
3810
ask 'malloc' for more than 65535 bytes with any image that has a
3811
sufficiently large row size (rather than simply failing to read such
3813
New tools directory containing tools used to generate libpng code.
3814
Fixed race conditions in parallel make builds. With higher degrees of
3815
parallelism during 'make' the use of the same temporary file names such
3816
as 'dfn*' can result in a race where a temporary file from one arm of the
3817
build is deleted or overwritten in another arm. This changes the
3818
temporary files for suffix rules to always use $* and ensures that the
3819
non-suffix rules use unique file names.
3821
Version 1.6.0beta02 [December 21, 2011]
3822
Correct configure builds where build and source directories are separate.
3823
The include path of 'config.h' was erroneously made relative in pngvalid.c
3826
Version 1.6.0beta03 [December 22, 2011]
3827
Start-up code size improvements, error handler flexibility. These changes
3828
alter how the tricky allocation of the initial png_struct and png_info
3829
structures are handled. png_info is now handled in pretty much the same
3830
way as everything else, except that the allocations handle NULL return
3831
silently. png_struct is changed in a similar way on allocation and on
3832
deallocation a 'safety' error handler is put in place (which should never
3833
be required). The error handler itself is changed to permit mismatches
3834
in the application and libpng error buffer size; however, this means a
3835
silent change to the API to return the jmp_buf if the size doesn't match
3836
the size from the libpng compilation; libpng now allocates the memory and
3837
this may fail. Overall these changes result in slight code size
3838
reductions; however, this is a reduction in code that is always executed
3839
so is particularly valuable. Overall on a 64-bit system the libpng DLL
3840
decreases in code size by 1733 bytes. pngerror.o increases in size by
3841
about 465 bytes because of the new functionality.
3842
Added png_convert_to_rfc1123_buffer() and deprecated png_convert_to_rfc1123()
3843
to avoid including a spurious buffer in the png_struct.
3845
Version 1.6.0beta04 [December 30, 2011]
3846
Regenerated configure scripts with automake-1.11.2
3847
Eliminated png_info_destroy(). It is now used only in png.c and only calls
3848
one other internal function and memset().
3849
Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously
3850
it was disabled whenever internal fixed point arithmetic was selected,
3851
which meant it didn't exist even on systems where FP was available but not
3853
Added pngvalid.c compile time checks for const APIs.
3854
Implemented 'restrict' for png_info and png_struct. Because of the way
3855
libpng works both png_info and png_struct are always accessed via a
3856
single pointer. This means adding C99 'restrict' to the pointer gives
3857
the compiler some opportunity to optimize the code. This change allows
3859
Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper
3860
location in configure.ac (Gilles Espinasse).
3861
Changed png_memcpy to C assignment where appropriate. Changed all those
3862
uses of png_memcpy that were doing a simple assignment to assignments
3863
(all those cases where the thing being copied is a non-array C L-value).
3864
Added some error checking to png_set_*() routines.
3865
Removed the reference to the non-exported function png_memcpy() from
3867
Fixed the Visual C 64-bit build - it requires jmp_buf to be aligned, but
3868
it had become misaligned.
3869
Revised contrib/pngminus/pnm2png.c to avoid warnings when png_uint_32
3870
and unsigned long are of different sizes.
3872
Version 1.6.0beta05 [January 15, 2012]
3873
Updated manual with description of the simplified API (copied from png.h)
3874
Fix bug in pngerror.c: some long warnings were being improperly truncated
3875
(CVE-2011-3464, bug introduced in libpng-1.5.3beta05).
3877
Version 1.6.0beta06 [January 24, 2012]
3878
Added palette support to the simplified APIs. This commit
3879
changes some of the macro definitions in png.h, app code
3880
may need corresponding changes.
3881
Increased the formatted warning buffer to 192 bytes.
3882
Added color-map support to simplified API. This is an initial version for
3883
review; the documentation has not yet been updated.
3884
Fixed Min/GW uninstall to remove libpng.dll.a
3886
Version 1.6.0beta07 [January 28, 2012]
3887
Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived)
3888
compiler issues slightly different warnings from those issued by the
3889
current versions of GCC. This eliminates those warnings by
3890
adding/removing casts and small code rewrites.
3891
Updated configure.ac from autoupdate: added --enable-werror option.
3892
Also some layout regularization and removal of introduced tab characters
3893
(replaced with 3-character indentation). Obsolete macros identified by
3894
autoupdate have been removed; the replacements are all in 2.59 so
3895
the pre-req hasn't been changed. --enable-werror checks for support
3896
for -Werror (or the given argument) in the compiler. This mimics the
3897
gcc configure option by allowing -Werror to be turned on safely; without
3898
the option the tests written in configure itself fail compilation because
3899
they cause compiler warnings.
3900
Rewrote autogen.sh to run autoreconf instead of running tools one-by-one.
3901
Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt and
3902
set CMAKE_LIBRARY_OUTPUT_DIRECTORY to "lib" on all platforms (C. Yapp).
3903
Freeze libtool files in the 'scripts' directory. This version of autogen.sh
3904
attempts to dissuade people from running it when it is not, or should not,
3905
be necessary. In fact, autogen.sh does not work when run in a libpng
3906
directory extracted from a tar distribution anymore. You must run it in
3907
a GIT clone instead.
3908
Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale),
3909
and renamed three whose names were inconsistent with those in
3910
pngsuite/README.txt.
3912
Version 1.6.0beta08 [February 1, 2012]
3913
Fixed Image::colormap misalignment in pngstest.c
3914
Check libtool/libtoolize version number (2.4.2) in configure.ac
3915
Divide test-pngstest.sh into separate pngstest runs for basic and
3917
Moved automake options to AM_INIT_AUTOMAKE in configure.ac
3918
Added color-tests, silent-rules (Not yet implemented in Makefile.am) and
3919
version checking to configure.ac
3920
Improved pngstest speed by not doing redundant tests and add const to
3921
the background parameter of png_image_finish_read. The --background
3922
option is now done automagically only when required, so that command-line
3923
option no longer exists.
3924
Cleaned up pngpriv.h to consistently declare all functions and data.
3925
Also eliminated PNG_CONST_DATA, which is apparently not needed but we
3926
can't be sure until it is gone.
3927
Added symbol prefixing that allows all the libpng external symbols
3928
to be prefixed (suggested by Reuben Hawkins).
3929
Updated "ftbb*.png" list in the owatcom and vstudio projects.
3930
Fixed 'prefix' builds on clean systems. The generation of pngprefix.h
3931
should not require itself.
3932
Updated INSTALL to explain that autogen.sh must be run in a GIT clone,
3933
not in a libpng directory extracted from a tar distribution.
3935
Version 1.6.0beta09 [February 1, 2012]
3936
Reverted the prebuilt configure files to libpng-1.6.0beta05 condition.
3938
Version 1.6.0beta10 [February 3, 2012]
3939
Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests
3940
Updated list of test images in CMakeLists.txt
3941
Updated the prebuilt configure files to current condition.
3942
Revised INSTALL information about autogen.sh; it works in tar distributions.
3944
Version 1.6.0beta11 [February 16, 2012]
3945
Fix character count in pngstest command in projects/owatcom/pngstest.tgt
3946
Revised test-pngstest.sh to report PASS/FAIL for each image.
3947
Updated documentation about the simplified API.
3948
Corrected estimate of error in libpng png_set_rgb_to_gray API. The API is
3949
extremely inaccurate for sRGB conversions because it uses an 8-bit
3950
intermediate linear value and it does not use the sRGB transform, so it
3951
suffers from the known instability in gamma transforms for values close
3952
to 0 (see Poynton). The net result is that the calculation has a maximum
3953
error of 14.99/255; 0.5/255^(1/2.2). pngstest now uses 15 for the
3954
permitted 8-bit error. This may still not be enough because of arithmetic
3956
Removed some unused arrays (with #ifdef) from png_read_push_finish_row().
3957
Fixed a memory overwrite bug in simplified read of RGB PNG with
3958
non-linear gamma Also bugs in the error checking in pngread.c and changed
3959
quite a lot of the checks in pngstest.c to be correct; either correctly
3960
written or not over-optimistic. The pngstest changes are insufficient to
3961
allow all possible RGB transforms to be passed; pngstest cmppixel needs
3962
to be rewritten to make it clearer which errors it allows and then changed
3963
to permit known inaccuracies.
3964
Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h
3965
Fixed fixed/float API export conditionals. 1) If FIXED_POINT or
3966
FLOATING_POINT options were switched off, png.h ended up with lone ';'
3967
characters. This is not valid ANSI-C outside a function. The ';'
3968
characters have been moved inside the definition of PNG_FP_EXPORT and
3969
PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration
3970
of the corresponding functions were completely omitted, even though some
3971
of them are still used internally. The result is still valid, but
3972
produces warnings from gcc with some warning options (including -Wall). The
3973
fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION
3974
when png.h is included from pngpriv.h.
3975
Check for invalid palette index while reading paletted PNG. When one is
3976
found, issue a warning and increase png_ptr->num_palette accordingly.
3977
Apps are responsible for checking to see if that happened.
3979
Version 1.6.0beta12 [February 18, 2012]
3980
Do not increase num_palette on invalid_index.
3981
Relocated check for invalid palette index to pngrtran.c, after unpacking
3982
the sub-8-bit pixels.
3983
Fixed CVE-2011-3026 buffer overrun bug. This bug was introduced when
3984
iCCP chunk support was added at libpng-1.0.6. Deal more correctly with the
3985
test on iCCP chunk length. Also removed spurious casts that may hide
3986
problems on 16-bit systems.
3988
Version 1.6.0beta13 [February 24, 2012]
3989
Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from
3990
pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c;
3991
now that png_ptr->buffer is inaccessible to applications, the special
3992
handling is no longer useful.
3993
Added PNG_SAFE_LIMITS feature to pnglibconf.dfa, pngpriv.h, and new
3994
pngusr.dfa to reset the user limits to safe ones if PNG_SAFE_LIMITS is
3995
defined. To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED=1" on the
3996
configure command or put #define PNG_SAFE_LIMITS_SUPPORTED in
3997
pnglibconf.h.prebuilt and pnglibconf.h.
3999
Version 1.6.0beta14 [February 27, 2012]
4000
Added information about the new limits in the manual.
4003
Version 1.6.0beta15 [March 2, 2012]
4004
Removed unused "current_text" members of png_struct and the png_free()
4005
of png_ptr->current_text from pngread.c
4006
Rewrote pngstest.c for substantial speed improvement.
4007
Fixed transparent pixel and 16-bit rgb tests in pngstest and removed a
4008
spurious check in pngwrite.c
4009
Added PNG_IMAGE_FLAG_FAST for the benefit of applications that store
4010
intermediate files, or intermediate in-memory data, while processing
4011
image data with the simplified API. The option makes the files larger
4012
but faster to write and read. pngstest now uses this by default; this
4013
can be disabled with the --slow option.
4014
Improved pngstest fine tuning of error numbers, new test file generator.
4015
The generator generates images that test the full range of sample values,
4016
allow the error numbers in pngstest to be tuned and checked. makepng
4017
also allows generation of images with extra chunks, although this is
4018
still work-in-progress.
4019
Added check for invalid palette index while reading.
4020
Fixed some bugs in ICC profile writing. The code should now accept
4021
all potentially valid ICC profiles and reject obviously invalid ones.
4022
It now uses png_error() to do so rather than casually writing a PNG
4023
without the necessary color data.
4024
Removed whitespace from the end of lines in all source files and scripts.
4026
Version 1.6.0beta16 [March 6, 2012]
4027
Relocated palette-index checking function from pngrutil.c to pngtrans.c
4028
Added palette-index checking while writing.
4029
Changed png_inflate() and calling routines to avoid overflow problems.
4030
This is an intermediate check-in that solves the immediate problems and
4031
introduces one performance improvement (avoiding a copy via png_ptr->zbuf.)
4032
Further changes will be made to make ICC profile handling more secure.
4033
Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default options
4034
declares 'index' as a global, causing a warning if it is used as a local
4035
variable. GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit)
4036
to an (int) (signed 32-bit). MSVC, however, warns about using the
4037
unary '-' operator on an unsigned value (even though it is well defined
4038
by ANSI-C to be ~x+1). The padding calculation was changed to use a
4039
different method. Removed the tests on png_ptr->pass.
4040
Added contrib/libtests/tarith.c to test internal arithmetic functions from
4041
png.c. This is a libpng maintainer program used to validate changes to the
4042
internal arithmetic functions.
4043
Made read 'inflate' handling like write 'deflate' handling. The read
4044
code now claims and releases png_ptr->zstream, like the write code.
4045
The bug whereby the progressive reader failed to release the zstream
4046
is now fixed, all initialization is delayed, and the code checks for
4047
changed parameters on deflate rather than always calling
4048
deflatedEnd/deflateInit.
4049
Validate the zTXt strings in pngvalid.
4050
Added code to validate the windowBits value passed to deflateInit2().
4051
If the call to deflateInit2() is wrong a png_warning will be issued
4052
(in fact this is harmless, but the PNG data produced may be sub-optimal).
4054
Version 1.6.0beta17 [March 10, 2012]
4055
Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition.
4056
Reject all iCCP chunks after the first, even if the first one is invalid.
4057
Deflate/inflate was reworked to move common zlib calls into single
4058
functions [rw]util.c. A new shared keyword check routine was also added
4059
and the 'zbuf' is no longer allocated on progressive read. It is now
4060
possible to call png_inflate() incrementally. A warning is no longer
4061
issued if the language tag or translated keyword in the iTXt chunk
4063
If benign errors are disabled use maximum window on ancillary inflate.
4064
This works round a bug introduced in 1.5.4 where compressed ancillary
4065
chunks could end up with a too-small windowBits value in the deflate
4068
Version 1.6.0beta18 [March 16, 2012]
4069
Issue a png_benign_error() instead of png_warning() about bad palette index.
4070
In pngtest, treat benign errors as errors if "-strict" is present.
4071
Fixed an off-by-one error in the palette index checking function.
4072
Fixed a compiler warning under Cygwin (Windows-7, 32-bit system)
4073
Revised example.c to put text strings in a temporary character array
4074
instead of directly assigning string constants to png_textp members.
4075
This avoids compiler warnings when -Wwrite-strings is enabled.
4076
Added output flushing to aid debugging under Visual Studio. Unfortunately
4077
this is necessary because the VS2010 output window otherwise simply loses
4078
the error messages on error (they weren't flushed to the window before
4079
the process exited, apparently!)
4080
Added configuration support for benign errors and changed the read
4081
default. Also changed some warnings in the iCCP and sRGB handling
4082
from to benign errors. Configuration now makes read benign
4083
errors warnings and write benign errors to errors by default (thus
4084
changing the behavior on read). The simplified API always forces
4085
read benign errors to warnings (regardless of the system default, unless
4086
this is disabled in which case the simplified API can't be built.)
4088
Version 1.6.0beta19 [March 18, 2012]
4089
Work around for duplicate row start calls; added warning messages.
4090
This turns on PNG_FLAG_DETECT_UNINITIALIZED to detect app code that
4091
fails to call one of the 'start' routines (not enabled in libpng-1.5
4092
because it is technically an API change, since it did normally work
4093
before.) It also makes duplicate calls to png_read_start_row (an
4094
internal function called at the start of the image read) benign, as
4095
they were before changes to use png_inflate_claim. Somehow webkit is
4096
causing this to happen; this is probably a mis-feature in the zlib
4097
changes so this commit is only a work-round.
4098
Removed erroneous setting of DETECT_UNINITIALIZED and added more
4099
checks. The code now does a png_error if an attempt is made to do the
4100
row initialization twice; this is an application error and it has
4101
serious consequences because the transform data in png_struct is
4102
changed by each call.
4103
Added application error reporting and added chunk names to read
4104
benign errors; also added --strict to pngstest - not enabled
4105
yet because a warning is produced.
4106
Avoid the double gamma correction warning in the simplified API.
4107
This allows the --strict option to pass in the pngstest checks
4109
Version 1.6.0beta20 [March 29, 2012]
4110
Changed chunk handler warnings into benign errors, incrementally load iCCP
4111
Added checksum-icc.c to contrib/tools
4112
Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice.
4113
Recognize known sRGB ICC profiles while reading; prefer writing the
4114
iCCP profile over writing the sRGB chunk, controlled by the
4115
PNG_sRGB_PROFILE_CHECKS option.
4116
Revised png_set_text_2() to avoid potential memory corruption (fixes
4117
CVE-2011-3048, also known as CVE-2012-3425).
4119
Version 1.6.0beta21 [April 27, 2012]
4120
Revised scripts/makefile.darwin: use system zlib; remove quotes around
4121
architecture list; add missing ppc architecture; add architecture options
4122
to shared library link; don't try to create a shared lib based on missing
4124
Enable png_set_check_for_invalid_index() for both read and write.
4125
Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpriv.h around
4126
declaration of png_handle_unknown().
4127
Added -lssp_nonshared in a comment in scripts/makefile.freebsd
4128
and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE.
4130
Version 1.6.0beta22 [May 23, 2012]
4131
Removed need for -Wno-cast-align with clang. clang correctly warns on
4132
alignment increasing pointer casts when -Wcast-align is passed. This
4133
fixes the cases that clang warns about either by eliminating the
4134
casts from png_bytep to png_uint_16p (pngread.c), or, for pngrutil.c
4135
where the cast is previously verified or pngstest.c where it is OK, by
4136
introducing new png_aligncast macros to do the cast in a way that clang
4139
Version 1.6.0beta23 [June 6, 2012]
4140
Revised CMakeLists.txt to not attempt to make a symlink under mingw.
4141
Made fixes for new optimization warnings from gcc 4.7.0. The compiler
4142
performs an optimization which is safe; however it then warns about it.
4143
Changing the type of 'palette_number' in pngvalid.c removes the warning.
4144
Do not depend upon a GCC feature macro being available for use in generating
4145
the linker mapfile symbol prefix.
4146
Improved performance of new do_check_palette_indexes() function (only
4147
update the value when it actually increases, move test for whether
4148
the check is wanted out of the function.
4150
Version 1.6.0beta24 [June 7, 2012]
4151
Don't check palette indexes if num_palette is 0 (as it can be in MNG files).
4153
Version 1.6.0beta25 [June 16, 2012]
4154
Revised png_set_keep_unknown_chunks() so num_chunks < 0 means ignore all
4155
unknown chunks and all known chunks except for IHDR, PLTE, tRNS, IDAT,
4156
and IEND. Previously it only meant ignore all unknown chunks, the
4157
same as num_chunks == 0. Revised png_image_skip_unused_chunks() to
4158
provide a list of chunks to be processed instead of a list of chunks to
4159
ignore. Revised contrib/gregbook/readpng2.c accordingly.
4161
Version 1.6.0beta26 [July 10, 2012]
4162
Removed scripts/makefile.cegcc from the *.zip and *.7z distributions; it
4163
depends on configure, which is not included in those archives.
4164
Moved scripts/chkfmt to contrib/tools.
4165
Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386.
4167
Version 1.6.0beta27 [August 11, 2012]
4168
Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3.
4169
Do not use __restrict when GNUC is <= 3.1
4170
Removed references to png_zalloc() and png_zfree() from the manual.
4171
Fixed configurations where floating point is completely disabled. Because
4172
of the changes to support symbol prefixing PNG_INTERNAL_FUNCTION declares
4173
floating point APIs during libpng builds even if they are completely
4174
disabled. This requires the png floating point types (png_double*) to be
4175
declared even though the functions are never actually defined. This
4176
change provides a dummy definition so that the declarations work, yet any
4177
implementation will fail to compile because of an incomplete type.
4178
Re-eliminated the use of strcpy() in pngtest.c. An unnecessary use of
4179
strcpy() was accidentally re-introduced in libpng16; this change replaces
4181
Eliminated use of png_sizeof(); use sizeof() instead.
4182
Use a consistent style for (sizeof type) and (sizeof (array))
4183
Cleanup of png_set_filler(). This function does very different things on
4184
read and write. In libpng 1.6 the two cases can be distinguished and
4185
considerable code cleanup, and extra error checking, is possible. This
4186
makes calls on the write side that have no effect be ignored with a
4187
png_app_error(), which can be disabled in the app using
4188
png_set_benign_errors(), and removes the spurious use of usr_channels
4190
Insist on autotools 1.12.1 for git builds because there are security issues
4191
with 1.12 and insisting on anything less would allow 1.12 to be used.
4192
Removed info_ptr->signature[8] from WRITE-only builds.
4193
Add some conditions for compiling png_fixed(). This is a small function
4194
but it requires "-lm" on some platforms.
4195
Cause pngtest --strict to fail on any warning from libpng (not just errors)
4196
and cause it not to fail at the comparison step if libpng lacks support
4197
for writing chunks that it reads from the input (currently only implemented
4198
for compressed text chunks).
4199
Make all three "make check" test programs work without READ or WRITE support.
4200
Now "make check" will succeed even if libpng is compiled with -DPNG_NO_READ
4201
or -DPNG_NO_WRITE. The tests performed are reduced, but the basic reading
4202
and writing of a PNG file is always tested by one or more of the tests.
4203
Consistently use strlen(), memset(), memcpy(), and memcmp() instead of the
4204
png_strlen(), png_memset(), png_memcpy(), and png_memcmp() macros.
4205
Removed the png_sizeof(), png_strlen(), png_memset(), png_memcpy(), and
4206
png_memcmp() macros.
4207
Work around gcc 3.x and Microsoft Visual Studio 2010 complaints. Both object
4208
to the split initialization of num_chunks.
4210
Version 1.6.0beta28 [August 29, 2012]
4211
Unknown handling fixes and clean up. This adds more correct option
4212
control of the unknown handling, corrects the pre-existing bug where
4213
the per-chunk 'keep' setting is ignored and makes it possible to skip
4214
IDAT chunks in the sequential reader (broken in earlier 1.6 versions).
4215
There is a new test program, test-unknown.c, which is a work in progress
4216
(not currently part of the test suite). Comments in the header files now
4217
explain how the unknown handling works.
4218
Allow fine grain control of unknown chunk APIs. This change allows
4219
png_set_keep_unknown_chunks() to be turned off if not required and causes
4220
both read and write to behave appropriately (on read this is only possible
4221
if the user callback is used to handle unknown chunks). The change
4222
also removes the support for storing unknown chunks in the info_struct
4223
if the only unknown handling enabled is via the callback, allowing libpng
4224
to be configured with callback reading and none of the unnecessary code.
4225
Corrected fix for unknown handling in pngtest. This reinstates the
4226
libpng handling of unknown chunks other than vpAg and sTER (including
4227
unsafe-to-copy chunks which were dropped before) and eliminates the
4228
repositioning of vpAg and sTER in pngtest.png by changing pngtest.png
4229
(so the chunks are where libpng would put them).
4230
Added "tunknown" test and corrected a logic error in png_handle_unknown()
4231
when SAVE support is absent. Moved the shell test scripts for
4232
contrib/libtests from the libpng top directory to contrib/libtests.
4233
png_handle_unknown() must always read or skip the chunk, if
4234
SAVE_UNKNOWN_CHUNKS is turned off *and* the application does not set
4235
a user callback an unknown chunk will not be read, leading to a read
4236
error, which was revealed by the "tunknown" test.
4237
Cleaned up and corrected ICC profile handling.
4238
contrib/libtests/makepng: corrected 'rgb' and 'gray' cases. profile_error
4239
messages could be truncated; made a correct buffer size calculation and
4240
adjusted pngerror.c appropriately. png_icc_check_* checking improved;
4241
changed the functions to receive the correct color type of the PNG on read
4242
or write and check that it matches the color space of the profile (despite
4243
what the comments said before, there is danger in assuming the app will
4244
cope correctly with an RGB profile on a grayscale image and, since it
4245
violates the PNG spec, allowing it is certain to produce inconsistent
4246
app behavior and might even cause app crashes.) Check that profiles
4247
contain the tags needed to process the PNG (tags all required by the ICC
4248
spec). Removed unused PNG_STATIC from pngpriv.h.
4250
Version 1.6.0beta29 [September 4, 2012]
4251
Fixed the simplified API example programs to add the *colormap parameter
4252
to several of he API and improved the error message if the version field
4254
Added contrib/examples/* to the *.zip and *.7z distributions.
4255
Updated simplified API synopses and description of the png_image structure
4257
Made makepng and pngtest produce identical PNGs, add "--relaxed" option
4258
to pngtest. The "--relaxed" option turns off the benign errors that are
4259
enabled by default in pre-RC builds. makepng can now write ICC profiles
4260
where the length has not been extended to a multiple of 4, and pngtest
4261
now intercepts all libpng errors, allowing the previously-introduced
4262
"--strict test" on no warnings to actually work.
4263
Improved ICC profile handling including cHRM chunk generation and fixed
4264
Cygwin+MSVC build errors. The ICC profile handling now includes more
4265
checking. Several errors that caused rejection of the profile are now
4266
handled with a warning in such a way that the invalid profiles will be
4267
read by default in release (but not pre-RC) builds but will not be
4268
written by default. The easy part of handling the cHRM chunk is written,
4269
where the ICC profile contains the required data. The more difficult
4270
part plus guessing a gAMA value requires code to pass selected RGB values
4271
through the profile.
4273
Version 1.6.0beta30 [October 24, 2012]
4274
Changed ICC profile matrix/vector types to not depend on array type rules.
4275
By the ANSI-C standard the new types should be identical to the previous
4276
versions, and all known versions of gcc tested with the previous versions
4277
except for GCC-4.2.1 work with this version. The change makes the ANSI-C
4278
rule that const applied to an array of elements applies instead to the
4279
elements in the array moot by explicitly applying const to the base
4280
elements of the png_icc_matrix and png_icc_vector types. The accidental
4281
(harmless) 'const' previously applied to the parameters of two of the
4282
functions have also been removed.
4283
Added a work around for GCC 4.2 optimization bug.
4284
Marked the broken (bad white point) original HP sRGB profiles correctly and
4286
Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7
4287
Use /MDd for vstudio debug builds. Also added pngunkown to the vstudio
4288
builds, fixed build errors and corrected a minor exit code error in
4289
pngvalid if the 'touch' file name is invalid.
4290
Add updated WARNING file to projects/vstudio from libpng 1.5/vstudio
4291
Fixed build when using #define PNG_NO_READ_GAMMA in png_do_compose() in
4292
pngrtran.c (Domani Hannes).
4294
Version 1.6.0beta31 [November 1, 2012]
4295
Undid the erroneous change to vstudio/pngvalid build in libpng-1.6.0beta30.
4296
Made pngvalid so that it will build outside the libpng source tree.
4297
Made builds -DPNG_NO_READ_GAMMA compile (the unit tests still fail).
4298
Made PNG_NO_READ_GAMMA switch off interfaces that depend on READ_GAMMA.
4299
Prior to 1.6.0 switching off READ_GAMMA did unpredictable things to the
4300
interfaces that use it (specifically, png_do_background in 1.4 would
4301
simply display composite for grayscale images but do composition
4302
with the incorrect arithmetic for color ones). In 1.6 the semantic
4303
of -DPNG_NO_READ_GAMMA is changed to simply disable any interface that
4304
depends on it; this obliges people who set it to consider whether they
4305
really want it off if they happen to use any of the interfaces in
4306
question (typically most users who disable it won't).
4307
Fixed GUIDs in projects/vstudio. Some were duplicated or missing,
4308
resulting in VS2010 having to update the files.
4309
Removed non-working ICC profile support code that was mostly added to
4310
libpng-1.6.0beta29 and beta30. There was too much code for too little
4311
gain; implementing full ICC color correction may be desirable but is left
4314
Version 1.6.0beta32 [November 25, 2012]
4315
Fixed an intermittent SEGV in pngstest due to an uninitialized array element.
4316
Added the ability for contrib/libtests/makepng.c to make a PNG with just one
4317
color. This is useful for debugging pngstest color inaccuracy reports.
4318
Fixed error checking in the simplified write API (Olaf van der Spek)
4319
Made png_user_version_check() ok to use with libpng version 1.10.x and later.
4321
Version 1.6.0beta33 [December 15, 2012]
4322
Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX)
4323
that causes the MALLOC_MAX limit not to work (John Bowler)
4324
Change png_warning() to png_app_error() in pngwrite.c and comment the
4325
fall-through condition.
4326
Change png_warning() to png_app_warning() in png_write_tRNS().
4327
Rearranged the ARM-NEON optimizations: Isolated the machine specific code
4328
to the hardware subdirectory and added comments to pngrutil.c so that
4329
implementors of other optimizations know what to do.
4330
Fixed cases of unquoted DESTDIR in Makefile.am
4331
Rebuilt Makefile.in, etc., with autoconf-2.69 and automake-1.12.5.
4333
Version 1.6.0beta34 [December 19, 2012]
4334
Cleaned up whitespace in the synopsis portion of the manpage "libpng.3"
4335
Disassembled the version number in scripts/options.awk (necessary for
4338
Version 1.6.0beta35 [December 23, 2012]
4339
Made default Zlib compression settings be configurable. This adds #defines to
4340
pnglibconf.h to control the defaults.
4341
Fixed Windows build issues, enabled ARM compilation. Various warnings issued
4342
by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old
4343
GCCs.) ARM support is enabled by default in zlib.props (unsupported by
4344
Microsoft) and ARM compilation is made possible by deleting the check for
4345
x86. The test programs cannot be run because they are not signed.
4347
Version 1.6.0beta36 [January 2, 2013]
4348
Discontinued distributing libpng-1.x.x.tar.bz2.
4349
Discontinued distributing libpng-1.7.0-1.6.0-diff.txt and similar.
4350
Rebuilt configure with autoconf-2.69 (inadvertently not done in beta33)
4351
Fixed 'make distcheck' on SUN OS - libpng.so was not being removed
4353
Version 1.6.0beta37 [January 10, 2013]
4354
Fixed conceivable but difficult to repro overflow. Also added two test
4355
programs to generate and test a PNG which should have the problem.
4357
Version 1.6.0beta39 [January 19, 2013]
4358
Again corrected attempt at overflow detection in png_set_unknown_chunks()
4359
(CVE-2013-7353). Added overflow detection in png_set_sPLT() and
4360
png_set_text_2() (CVE-2013-7354).
4362
Version 1.6.0beta40 [January 20, 2013]
4363
Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs
4365
Version 1.6.0rc01 [January 26, 2013]
4368
Version 1.6.0rc02 [February 4, 2013]
4369
Added png_get_palette_max() function.
4371
Version 1.6.0rc03 [February 5, 2013]
4372
Fixed the png_get_palette_max API.
4374
Version 1.6.0rc04 [February 7, 2013]
4375
Turn serial tests back on (recently turned off by autotools upgrade).
4377
Version 1.6.0rc05 [February 8, 2013]
4378
Update manual about png_get_palette_max().
4380
Version 1.6.0rc06 [February 9, 2013]
4381
Fixed missing dependency in --prefix builds The intermediate
4382
internal 'prefix.h' file can only be generated correctly after
4383
pnglibconf.h, however the dependency was not in Makefile.am. The
4384
symptoms are unpredictable depending on the order make chooses to
4385
build pngprefix.h and pnglibconf.h, often the error goes unnoticed
4386
because there is a system pnglibconf.h to use instead.
4388
Version 1.6.0rc07 [February 10, 2013]
4389
Enclosed the new png_get_palette_max in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED
4390
block, and revised pnglibconf.h and pnglibconf.h.prebuilt accordingly.
4392
Version 1.6.0rc08 [February 10, 2013]
4393
Fix typo in png.h #ifdef
4395
Version 1.6.0 [February 14, 2013]
4398
Version 1.6.1beta01 [February 16, 2013]
4399
Made symbol prefixing work with the ARM neon optimizations. Also allow
4400
pngpriv.h to be included for preprocessor definitions only, so it can
4401
be used in non-C/C++ files. Back ported from libpng 1.7.
4402
Made sRGB check numbers consistent.
4403
Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug.
4404
Removed cc -E workround, corrected png_get_palette_max API Tested on
4405
SUN OS cc 5.9, which demonstrates the tokenization problem previously
4406
avoided by using /lib/cpp. Since all .dfn output is now protected in
4407
double quotes unless it is to be macro substituted the fix should
4409
Enabled parallel tests - back ported from libpng-1.7.
4410
scripts/pnglibconf.dfa formatting improvements back ported from libpng17.
4411
Fixed a race condition in the creation of the build 'scripts' directory
4412
while building with a parallel make.
4413
Use approved/supported Android method to check for NEON, use Linux/POSIX
4414
1003.1 API to check /proc/self/auxv avoiding buffer allocation and other
4415
library calls (ported from libpng15).
4417
Version 1.6.1beta02 [February 19, 2013]
4418
Use parentheses more consistently in "#if defined(MACRO)" tests.
4420
Reenabled code to allow zero length PLTE chunks for MNG.
4422
Version 1.6.1beta03 [February 22, 2013]
4423
Fixed ALIGNED_MEMORY support.
4424
Added a new configure option:
4425
--enable-arm-neon=always will stop the run-time checks. New checks
4426
within arm/arm_init.c will cause the code not to be compiled unless
4427
__ARM_NEON__ is set. This should make it fail safe (if someone asks
4428
for it on then the build will fail if it can't be done.)
4429
Updated the INSTALL document.
4431
Version 1.6.1beta04 [February 27, 2013]
4432
Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES.
4433
Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC.
4434
Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble
4435
with CRLF line endings.
4437
Version 1.6.1beta05 [March 1, 2013]
4438
Avoid a possible memory leak in contrib/gregbook/readpng.c
4440
Version 1.6.1beta06 [March 4, 2013]
4441
Better documentation of unknown handling API interactions.
4442
Corrected Android builds and corrected libpng.vers with symbol
4443
prefixing. It also makes those tests compile and link on Android.
4444
Added an API png_set_option() to set optimization options externally,
4445
providing an alternative and general solution for the non-portable
4446
run-time tests used by the ARM Neon code, using the PNG_ARM_NEON option.
4447
The order of settings vs options in pnglibconf.h is reversed to allow
4448
settings to depend on options and options can now set (or override) the
4449
defaults for settings.
4451
Version 1.6.1beta07 [March 7, 2013]
4452
Corrected simplified API default gamma for color-mapped output, added
4453
a flag to change default. In 1.6.0 when the simplified API was used
4454
to produce color-mapped output from an input image with no gamma
4455
information the gamma assumed for the input could be different from
4456
that assumed for non-color-mapped output. In particular 16-bit depth
4457
input files were assumed to be sRGB encoded, whereas in the 'direct'
4458
case they were assumed to have linear data. This was an error. The
4459
fix makes the simplified API treat all input files the same way and
4460
adds a new flag to the png_image::flags member to allow the
4461
application/user to specify that 16-bit files contain sRGB data
4462
rather than the default linear.
4463
Fixed bugs in the pngpixel and makepng test programs.
4465
Version 1.6.1beta08 [March 7, 2013]
4466
Fixed CMakelists.txt to allow building a single variant of the library
4468
Introduced a PNG_LIB_TARGETS variable that lists all activated library
4469
targets. It is an error if this variable ends up empty, ie. you have
4470
to build at least one library variant.
4471
Made the *_COPY targets only depend on library targets actually being build.
4472
Use PNG_LIB_TARGETS to unify a code path.
4473
Changed the CREATE_SYMLINK macro to expect the full path to a file as the
4474
first argument. When symlinking the filename component of that path is
4475
determined and used as the link target.
4476
Use copy_if_different in the CREATE_SYMLINK macro.
4478
Version 1.6.1beta09 [March 13, 2013]
4479
Eliminated two warnings from the Intel C compiler. The warnings are
4480
technically valid, although a reasonable treatment of division would
4481
show it to be incorrect.
4483
Version 1.6.1rc01 [March 21, 2013]
4486
Version 1.6.1 [March 28, 2013]
4489
Version 1.6.2beta01 [April 14, 2013]
4490
Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling.
4491
Fixed incorrect warning of excess deflate data. End condition - the
4492
warning would be produced if the end of the deflate stream wasn't read
4493
in the last row. The warning is harmless.
4494
Corrected the test on user transform changes on read. It was in the
4495
png_set of the transform function, but that doesn't matter unless the
4496
transform function changes the rowbuf size, and that is only valid if
4497
transform_info is called.
4498
Corrected a misplaced closing bracket in contrib/libtests/pngvalid.c
4500
Corrected length written to uncompressed iTXt chunks (Samuli Suominen).
4501
Bug was introduced in libpng-1.6.0.
4503
Version 1.6.2rc01 [April 18, 2013]
4504
Added contrib/tools/fixitxt.c, to repair the erroneous iTXt chunk length
4505
written by libpng-1.6.0 and 1.6.1.
4506
Disallow storing sRGB information when the sRGB is not supported.
4508
Version 1.6.2rc02 [April 18, 2013]
4509
Merge pngtest.c with libpng-1.7.0
4511
Version 1.6.2rc03 [April 22, 2013]
4512
Trivial spelling cleanup.
4514
Version 1.6.2rc04 and 1.6.2rc05 [omitted]
4516
Version 1.6.2rc06 [April 24, 2013]
4517
Reverted to version 1.6.2rc03. Recent changes to arm/neon support
4518
have been ported to libpng-1.7.0beta09 and will reappear in version
4521
Version 1.6.2 [April 25, 2013]
4524
Version 1.6.3beta01 [April 25, 2013]
4525
Revised stack marking in arm/filter_neon.S and configure.ac.
4526
Ensure that NEON filter stuff is completely disabled when switched 'off'.
4527
Previously the ARM NEON specific files were still built if the option
4528
was switched 'off' as opposed to being explicitly disabled.
4530
Version 1.6.3beta02 [April 26, 2013]
4531
Test for 'arm*' not just 'arm' in the host_cpu configure variable.
4532
Rebuilt the configure scripts.
4534
Version 1.6.3beta03 [April 30, 2013]
4535
Expanded manual paragraph about writing private chunks, particularly
4536
the need to call png_set_keep_unknown_chunks() when writing them.
4537
Avoid dereferencing NULL pointer possibly returned from
4538
png_create_write_struct() (Andrew Church).
4540
Version 1.6.3beta05 [May 9, 2013]
4541
Calculate our own zlib windowBits when decoding rather than trusting the
4542
CMF bytes in the PNG datastream.
4543
Added an option to force maximum window size for inflating, which was
4544
the behavior of libpng15 and earlier, via a new PNG_MAXIMUM_INFLATE_WINDOW
4545
option for png_set_options().
4546
Added png-fix-itxt and png-fix-too-far-back to the built programs and
4547
removed warnings from the source code and timepng that are revealed as
4549
Detect wrong libpng versions linked to png-fix-too-far-back, which currently
4550
only works with libpng versions that can be made to reliably fail when
4551
the deflate data contains an out-of-window reference. This means only
4553
Fixed gnu issues: g++ needs a static_cast, gcc 4.4.7 has a broken warning
4554
message which it is easier to work round than ignore.
4555
Updated contrib/pngminus/pnm2png.c (Paul Stewart):
4557
Ignore "#" delimited comments in input file to pnm2png.c.
4558
Fixed whitespace handling
4559
Added a call to png_set_packing()
4560
Initialize dimension values so if sscanf fails at least we have known
4562
Attempt to detect configuration issues with png-fix-too-far-back, which
4563
requires both the correct libpng and the correct zlib to function
4565
Check ZLIB_VERNUM for mismatches, enclose #error in quotes
4566
Added information in the documentation about problems with and fixes for
4567
the bad CRC and bad iTXt chunk situations.
4569
Version 1.6.3beta06 [May 12, 2013]
4570
Allow contrib/pngminus/pnm2png.c to compile without WRITE_INVERT and
4571
WRITE_PACK supported (writes error message that it can't read P1 or
4573
Improved png-fix-too-far-back usage message, added --suffix option.
4574
Revised contrib/pngminim/*/makefile to generate pnglibconf.h with the
4575
right zlib header files.
4576
Separated CPPFLAGS and CFLAGS in contrib/pngminim/*/makefile
4578
Version 1.6.3beta07 [June 8, 2013]
4579
Removed a redundant test in png_set_IHDR().
4580
Added set(CMAKE_CONFIGURATION_TYPES ...) to CMakeLists.txt (Andrew Hundt)
4581
Deleted set(CMAKE_BUILD_TYPE) block from CMakeLists.txt
4582
Enclose the prototypes for the simplified write API in
4583
#ifdef PNG_STDIO_SUPPORTED/#endif
4584
Make ARM NEON support work at compile time (not just configure time).
4585
This moves the test on __ARM_NEON__ into pngconf.h to avoid issues when
4586
using a compiler that compiles for multiple architectures at one time.
4587
Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from
4588
pnglibconf.h, allowing more of the decisions to be made internally
4589
(pngpriv.h) during the compile. Without this, symbol prefixing is broken
4590
under certain circumstances on ARM platforms. Now only the API parts of
4591
the optimizations ('check' vs 'api') are exposed in the public header files4592
except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the
4593
decision about whether or not to use the optimizations.
4594
Protect symbol prefixing against CC/CPPFLAGS/CFLAGS usage.
4595
Previous iOS/Xcode fixes for the ARM NEON optimizations moved the test
4596
on __ARM_NEON__ from configure time to compile time. This breaks symbol
4597
prefixing because the definition of the special png_init_filter_functions
4598
call was hidden at configure time if the relevant compiler arguments are
4599
passed in CFLAGS as opposed to CC. This change attempts to avoid all
4600
the confusion that would result by declaring the init function even when
4601
it is not used, so that it will always get prefixed.
4603
Version 1.6.3beta08 [June 18, 2013]
4604
Revised libpng.3 so that "doclifter" can process it.
4606
Version 1.6.3beta09 [June 27, 2013]
4607
Revised example.c to illustrate use of PNG_DEFAULT_sRGB and PNG_GAMMA_MAC_18
4608
as parameters for png_set_gamma(). These have been available since
4610
Renamed contrib/tools/png-fix-too-far-back.c to pngfix.c and revised it
4611
to check all compressed chunks known to libpng.
4613
Version 1.6.3beta10 [July 5, 2013]
4614
Updated documentation to show default behavior of benign errors correctly.
4615
Only compile ARM code when PNG_READ_SUPPORTED is defined.
4616
Fixed undefined behavior in contrib/tools/pngfix.c and added new strip
4617
option. pngfix relied on undefined behavior and even a simple change from
4618
gcc to g++ caused it to fail. The new strip option 'unsafe' has been
4619
implemented and is the default if --max is given. Option names have
4620
been clarified, with --strip=transform now stripping the bKGD chunk,
4621
which was stripped previously with --strip=unused.
4622
Added all documented chunk types to pngpriv.h
4623
Unified pngfix.c source with libpng17.
4625
Version 1.6.3rc01 [July 11, 2013]
4628
Version 1.6.3 [July 18, 2013]
4629
Revised manual about changes in iTXt chunk handling made in libpng-1.6.0.
4630
Added "/* SAFE */" comments in pngrutil.c and pngrtran.c where warnings
4631
may be erroneously issued by code-checking applications.
4633
Version 1.6.4beta01 [August 21, 2013]
4634
Added information about png_set_options() to the manual.
4635
Delay calling png_init_filter_functions() until a row with nonzero filter
4638
Version 1.6.4beta02 [August 30, 2013]
4639
Fixed inconsistent conditional compilation of png_chunk_unknown_handling()
4640
prototype, definition, and usage. Made it depend on
4641
PNG_HANDLE_AS_UNKNOWN_SUPPORTED everywhere.
4643
Version 1.6.4rc01 [September 5, 2013]
4646
Version 1.6.4 [September 12, 2013]
4649
Version 1.6.5 [September 14, 2013]
4650
Removed two stray lines of code from arm/arm_init.c.
4652
Version 1.6.6 [September 16, 2013]
4653
Removed two stray lines of code from arm/arm_init.c, again.
4655
Version 1.6.7beta01 [September 30, 2013]
4656
Revised unknown chunk code to correct several bugs in the NO_SAVE_/NO_WRITE
4658
Allow HANDLE_AS_UNKNOWN to work when other options are configured off. Also
4659
fixed the pngminim makefiles to work when $(MAKEFLAGS) contains stuff
4660
which terminates the make options (as by default in recent versions of
4662
Avoid up-cast warnings in pngvalid.c. On ARM the alignment requirements of
4663
png_modifier are greater than that of png_store and as a consequence
4664
compilation of pngvalid.c results in a warning about increased alignment
4665
requirements because of the bare cast to (png_modifier*). The code is safe,
4666
because the pointer is known to point to a stack allocated png_modifier,
4667
but this change avoids the warning.
4668
Fixed default behavior of ARM_NEON_API. If the ARM NEON API option was
4669
compiled without the CHECK option it defaulted to on, not off.
4670
Check user callback behavior in pngunknown.c. Previous versions compiled
4671
if SAVE_UNKNOWN was not available but did nothing since the callback
4672
was never implemented.
4673
Merged pngunknown.c with 1.7 version and back ported 1.7 improvements/fixes
4675
Version 1.6.7beta02 [October 12, 2013]
4676
Made changes for compatibility with automake 1.14:
4677
1) Added the 'compile' program to the list of programs that must be cleaned
4679
2) Added 'subdir-objects' which causes .c files in sub-directories to be
4680
compiled such that the corresponding .o files are also in the
4681
sub-directory. This is because automake 1.14 warns that the
4682
current behavior of compiling to the top level directory may be removed
4684
3) Updated dependencies on pnglibconf.h to match the new .o locations and
4685
added all the files in contrib/libtests and contrib/tools that depend
4687
4) Added 'BUILD_SOURCES = pnglibconf.h'; this is the automake recommended
4688
way of handling the dependencies of sources that are machine generated;
4689
unfortunately it only works if the user does 'make all' or 'make check',
4690
so the dependencies (3) are still required.
4691
Cleaned up (char*) casts of zlib messages. The latest version of the Intel C
4692
compiler complains about casting a string literal as (char*), so copied the
4693
treatment of z_const from the library code into pngfix.c
4694
Simplified error message code in pngunknown. The simplification has the
4695
useful side effect of avoiding a bogus warning generated by the latest
4696
version of the Intel C compiler (it objects to
4697
condition ? string-literal : string-literal).
4698
Make autogen.sh work with automake 1.13 as well as 1.14. Do this by always
4699
removing the 1.14 'compile' script but never checking for it.
4701
Version 1.6.7beta03 [October 19, 2013]
4702
Added ARMv8 support (James Yu <james.yu at linaro.org>). Added file
4703
arm/filter_neon_intrinsics.c; enable with -mfpu=neon.
4704
Revised pngvalid to generate size images with as many filters as it can
4705
manage, limited by the number of rows.
4706
Cleaned up ARM NEON compilation handling. The tests are now in pngpriv.h
4707
and detect the broken GCC compilers.
4709
Version 1.6.7beta04 [October 26, 2013]
4710
Allow clang derived from older GCC versions to use ARM intrinsics. This
4711
causes all clang builds that use -mfpu=neon to use the intrinsics code,
4712
not the assembler code. This has only been tested on iOS 7. It may be
4713
necessary to exclude some earlier clang versions but this seems unlikely.
4714
Changed NEON implementation selection mechanism. This allows assembler
4715
or intrinsics to be turned on at compile time during the build by defining
4716
PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). This macro
4717
is undefined by default and the build type is selected in pngpriv.h.
4719
Version 1.6.7rc01 [November 2, 2013]
4722
Version 1.6.7rc02 [November 7, 2013]
4723
Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char
4724
checking macros take an unsigned char argument, not a signed char.
4726
Version 1.6.7 [November 14, 2013]
4729
Version 1.6.8beta01 [November 24, 2013]
4730
Moved prototype for png_handle_unknown() in pngpriv.h outside of
4731
the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block.
4732
Added "-Wall" to CFLAGS in contrib/pngminim/*/makefile
4733
Conditionally compile some unused functions reported by -Wall in
4735
Fixed 'minimal' builds. Various obviously useful minimal configurations
4736
don't build because of missing contrib/libtests test programs and
4737
overly complex dependencies in scripts/pnglibconf.dfa. This change
4738
adds contrib/conftest/*.dfa files that can be used in automatic build
4739
scripts to ensure that these configurations continue to build.
4740
Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder.
4741
Fixed pngvalid 'fail' function declaration on the Intel C Compiler.
4742
This reverts to the previous 'static' implementation and works round
4743
the 'unused static function' warning by using PNG_UNUSED().
4745
Version 1.6.8beta02 [November 30, 2013]
4746
Removed or marked PNG_UNUSED some harmless "dead assignments" reported
4747
by clang scan-build.
4748
Changed tabs to 3 spaces in png_debug macros and changed '"%s"m'
4749
to '"%s" m' to improve portability among compilers.
4750
Changed png_free_default() to free() in pngtest.c
4752
Version 1.6.8rc01 [December 12, 2013]
4753
Tidied up pngfix inits and fixed pngtest no-write builds.
4755
Version 1.6.8rc02 [December 14, 2013]
4756
Handle zero-length PLTE chunk or NULL palette with png_error()
4757
instead of png_chunk_report(), which by default issues a warning
4758
rather than an error, leading to later reading from a NULL pointer
4759
(png_ptr->palette) in png_do_expand_palette(). This is CVE-2013-6954
4760
and VU#650142. Libpng-1.6.1 through 1.6.7 are vulnerable.
4761
Libpng-1.6.0 and earlier do not have this bug.
4763
Version 1.6.8 [December 19, 2013]
4766
Version 1.6.9beta01 [December 26, 2013]
4767
Bookkeeping: Moved functions around (no changes). Moved transform
4768
function definitions before the place where they are called so that
4769
they can be made static. Move the intrapixel functions and the
4770
grayscale palette builder out of the png?tran.c files. The latter
4771
isn't a transform function and is no longer used internally, and the
4772
former MNG specific functions are better placed in pngread/pngwrite.c
4773
Made transform implementation functions static. This makes the internal
4774
functions called by png_do_{read|write}_transformations static. On an4775
x86-64 DLL build (Gentoo Linux) this reduces the size of the text
4776
segment of the DLL by 1208 bytes, about 0.6%. It also simplifies
4777
maintenance by removing the declarations from pngpriv.h and allowing
4778
easier changes to the internal interfaces.
4779
Rebuilt configure scripts with automake-1.14.1 and autoconf-2.69
4780
in the tar distributions.
4782
Version 1.6.9beta02 [January 1, 2014]
4783
Added checks for libpng 1.5 to pngvalid.c. This supports the use of
4784
this version of pngvalid in libpng 1.5
4785
Merged with pngvalid.c from libpng-1.7 changes to create a single
4787
Removed #error macro from contrib/tools/pngfix.c (Thomas Klausner).
4788
Merged pngrio.c, pngtrans.c, pngwio.c, and pngerror.c with libpng-1.7.0
4789
Merged libpng-1.7.0 changes to make no-interlace configurations work
4791
Revised pngvalid.c to support libpng 1.5, which does not support the
4792
PNG_MAXIMUM_INFLATE_WINDOW option, so #define it out when appropriate in
4794
Allow unversioned links created on install to be disabled in configure.
4795
In configure builds 'make install' changes/adds links like png.h
4796
and libpng.a to point to the newly installed, versioned, files (e.g.
4797
libpng17/png.h and libpng17.a). Three new configure options and some
4798
rearrangement of Makefile.am allow creation of these links to be disabled.
4800
Version 1.6.9beta03 [January 10, 2014]
4801
Removed potentially misleading warning from png_check_IHDR().
4803
Version 1.6.9beta04 [January 20, 2014]
4804
Updated scripts/makefile.* to use CPPFLAGS (Cosmin).
4805
Added clang attribute support (Cosmin).
4807
Version 1.6.9rc01 [January 28, 2014]
4810
Version 1.6.9rc02 [January 30, 2014]
4811
Quiet an uninitialized memory warning from VC2013 in png_get_png().
4813
Version 1.6.9 [February 6, 2014]
4815
Version 1.6.10beta01 [February 9, 2014]
4816
Backported changes from libpng-1.7.0beta30 and beta31:
4817
Fixed a large number of instances where PNGCBAPI was omitted from
4818
function definitions.
4819
Added pngimage test program for png_read_png() and png_write_png()
4820
with two new test scripts.
4821
Removed dependence on !PNG_READ_EXPAND_SUPPORTED for calling
4822
png_set_packing() in png_read_png().
4823
Fixed combination of ~alpha with shift. On read invert alpha, processing
4824
occurred after shift processing, which causes the final values to be
4825
outside the range that should be produced by the shift. Reversing the
4826
order on read makes the two transforms work together correctly and mirrors
4827
the order used on write.
4828
Do not read invalid sBIT chunks. Previously libpng only checked sBIT
4829
values on write, so a malicious PNG writer could therefore cause
4830
the read code to return an invalid sBIT chunk, which might lead to
4831
application errors or crashes. Such chunks are now skipped (with
4832
chunk_benign_error).
4833
Make png_read_png() and png_write_png() prototypes in png.h depend
4834
upon PNG_READ_SUPPORTED and PNG_WRITE_SUPPORTED.
4835
Support builds with unsupported PNG_TRANSFORM_* values. All of the
4836
PNG_TRANSFORM_* values are always defined in png.h and, because they
4837
are used for both read and write in some cases, it is not reliable
4838
to #if out ones that are totally unsupported. This change adds error
4839
detection in png_read_image() and png_write_image() to do a
4840
png_app_error() if the app requests something that cannot be done
4841
and it adds corresponding code to pngimage.c to handle such options
4842
by not attempting to test them.
4844
Version 1.6.10beta02 [February 23, 2014]
4845
Moved redefines of png_error(), png_warning(), png_chunk_error(),
4846
and png_chunk_warning() from pngpriv.h to png.h to make them visible
4847
to libpng-calling applications.
4848
Moved OS dependent code from arm/arm_init.c, to allow the included
4849
implementation of the ARM NEON discovery function to be set at
4850
build-time and provide sample implementations from the current code in the
4851
contrib/arm-neon subdirectory. The __linux__ code has also been changed to
4852
compile and link on Android by using /proc/cpuinfo, and the old linux code
4853
is in contrib/arm-neon/linux-auxv.c. The new code avoids POSIX and Linux
4854
dependencies apart from opening /proc/cpuinfo and is C90 compliant.
4855
Check for info_ptr == NULL early in png_read_end() so we don't need to
4856
run all the png_handle_*() and depend on them to return if info_ptr == NULL.
4857
This improves the performance of png_read_end(png_ptr, NULL) and makes
4858
it more robust against future programming errors.
4859
Check for __has_extension before using it in pngconf.h, to
4860
support older Clang versions (Jeremy Sequoia).
4861
Treat CRC error handling with png_set_crc_action(), instead of with
4862
png_set_benign_errors(), which has been the case since libpng-1.6.0beta18.
4863
Use a user warning handler in contrib/gregbook/readpng2.c instead of default,
4864
so warnings will be put on stderr even if libpng has CONSOLE_IO disabled.
4865
Added png_ptr->process_mode = PNG_READ_IDAT_MODE in png_push_read_chunk
4866
after recognizing the IDAT chunk, which avoids an infinite loop while
4867
reading a datastream whose first IDAT chunk is of zero-length.
4868
This fixes CERT VU#684412 and CVE-2014-0333.
4869
Don't recognize known sRGB profiles as sRGB if they have been hacked,
4870
but don't reject them and don't issue a copyright violation warning.
4872
Version 1.6.10beta03 [February 25, 2014]
4873
Moved some documentation from png.h to libpng.3 and libpng-manual.txt
4874
Minor editing of contrib/arm-neon/README and contrib/examples/*.c
4876
Version 1.6.10rc01 [February 27, 2014]
4877
Fixed typos in the manual and in scripts/pnglibconf.dfa (CFLAGS -> CPPFLAGS
4878
and PNG_USR_CONFIG -> PNG_USER_CONFIG).
4880
Version 1.6.10rc02 [February 28, 2014]
4881
Removed unreachable return statement after png_chunk_error()
4884
Version 1.6.10rc03 [March 4, 2014]
4885
Un-deprecated png_data_freer().
4887
Version 1.6.10 [March 6, 2014]
4890
Version 1.6.11beta01 [March 17, 2014]
4891
Use "if (value != 0)" instead of "if (value)" consistently.
4892
Changed ZlibSrcDir from 1.2.5 to 1.2.8 in projects/vstudio.
4893
Moved configuration information from the manual to the INSTALL file.
4895
Version 1.6.11beta02 [April 6, 2014]
4896
Removed #if/#else/#endif from inside two pow() calls in pngvalid.c because
4897
they were handled improperly by Portland Group's PGI-14.1 - PGI-14.3
4898
when using its "__builtin_pow()" function.
4899
Silence 'unused parameter' build warnings (Cosmin Truta).
4900
$(CP) is now used alongside $(RM_F). Also, use 'copy' instead of 'cp'
4901
where applicable, and applied other minor makefile changes (Cosmin).
4902
Don't warn about invalid dimensions exceeding user limits (Cosmin).
4903
Allow an easy replacement of the default pre-built configuration
4904
header with a custom header, via the make PNGLIBCONF_H_PREBUILT
4907
Version 1.6.11beta03 [April 6, 2014]
4908
Fixed a typo in pngrutil.c, introduced in libpng-1.5.6, that interferes
4909
with "blocky" expansion of sub-8-bit interlaced PNG files (Eric Huss).
4910
Optionally use __builtin_bswap16() in png_do_swap().
4912
Version 1.6.11beta04 [April 19, 2014]
4913
Made progressive reading of interlaced images consistent with the
4914
behavior of the sequential reader and consistent with the manual, by
4915
moving some code out of the PNG_READ_INTERLACING_SUPPORTED blocks. The
4916
row_callback now receives the proper pass number and unexpanded rows, when
4917
png_combine_row() isn't built or used, and png_set_interlace_handling()
4919
Allow PNG_sRGB_PROFILE_CHECKING = (-1) to mean no sRGB profile checking.
4921
Version 1.6.11beta05 [April 26, 2014]
4922
Do not reject ICC V2 profiles that lack padding (Kai-Uwe Behrmann).
4923
Relocated closing bracket of the sRGB profile test loop to avoid getting
4924
"Not recognizing known sRGB profile that has been edited" warning for
4925
ICC V2 profiles that lack the MD5 signature in the profile header.
4927
Version 1.6.11beta06 [May 19, 2014]
4928
Added PNG_SKIP_sRGB_CHECK_PROFILE choice for png_set_option().
4930
Version 1.6.11rc01 [May 27, 2014]
4933
Version 1.6.11rc02 [June 3, 2014]
4934
Test ZLIB_VERNUM instead of PNG_ZLIB_VERNUM in contrib/tools/pngfix.c
4936
Version 1.6.11 [June 5, 2014]
4939
Version 1.6.12rc01 [June 6, 2014]
4940
Relocated new code from 1.6.11beta06 in png.c to a point after the
4941
declarations (Max Stepin).
4943
Version 1.6.12rc02 [June 7, 2014]
4944
Changed file permissions of contrib/tools/intgamma.sh,
4945
test-driver, and compile from 0644 to 0755 (Cosmin).
4947
Version 1.6.12rc03 [June 8, 2014]
4948
Ensure "__has_attribute()" macro exists before trying to use it with
4949
old clang compilers (MacPorts Ticket #43939).
4951
Version 1.6.12 [June 12, 2014]
4954
Version 1.6.13beta01 [July 4, 2014]
4955
Quieted -Wsign-compare and -Wclobber compiler warnings in
4956
contrib/pngminus/*.c
4957
Added "(void) png_ptr;" where needed in contrib/gregbook to quiet
4958
compiler complaints about unused pointers.
4959
Split a long output string in contrib/gregbook/rpng2-x.c.
4960
Added "PNG_SET_OPTION" requirement for sRGB chunk support to pnglibconf.dfa,
4961
Needed for write-only support (John Bowler).
4962
Changed "if defined(__ARM_NEON__)" to
4963
"if (defined(__ARM_NEON__) || defined(__ARM_NEON))" (James Wu).
4964
Fixed clang no-warning builds: png_digit was defined but never used.
4966
Version 1.6.13beta02 [July 21, 2014]
4967
Fixed an incorrect separator ("/" should be "\") in scripts/makefile.vcwin324968
(bug report from Wolfgang S. Kechel). Bug was introduced in libpng-1.6.11.
4969
Also fixed makefile.bc32, makefile.bor, makefile.msc, makefile.intel, and
4970
makefile.tc3 similarly.
4972
Version 1.6.13beta03 [August 3, 2014]
4973
Removed scripts/makefile.elf. It has not worked since libpng-1.5.0beta14
4974
due to elimination of the PNG_FUNCTION_EXPORT and PNG_DATA_EXPORT
4975
definitions from pngconf.h.
4976
Ensure that CMakeLists.txt makes the target "lib" directory before making
4977
symbolic link into it (SourceForge bug report #226 by Rolf Timmermans).
4979
Version 1.6.13beta04 [August 8, 2014]
4980
Added opinion that the ECCN (Export Control Classification Number) for
4981
libpng is EAR99 to the README file.
4982
Eliminated use of "$<" in makefile explicit rules, when copying
4983
$PNGLIBCONF_H_PREBUILT. This does not work on some versions of make;
4984
bug introduced in libpng version 1.6.11.
4986
Version 1.6.13rc01 [August 14, 2014]
4987
Made "ccopts" agree with "CFLAGS" in scripts/makefile.hp* and makefile.*sunu
4989
Version 1.6.13 [August 21, 2014]
4992
Version 1.6.14beta01 [September 14, 2014]
4993
Guard usage of png_ptr->options with #ifdef PNG_SET_OPTION_SUPPORTED.
4994
Do not build contrib/tools/pngfix.c when PNG_SETJMP_NOT_SUPPORTED,
4995
to allow "make" to complete without setjmp support (bug report by
4997
Add "#include <setjmp.h>" to contrib/tools/pngfix.c (John Bowler)
4999
Version 1.6.14beta02 [September 18, 2014]
5000
Use nanosleep() instead of usleep() in contrib/gregbook/rpng2-x.c
5001
because usleep() is deprecated.
5002
Define usleep() in contrib/gregbook/rpng2-x.c if not already defined
5003
in unistd.h and nanosleep() is not available; fixes error introduced
5005
Disable floating point exception handling in pngvalid.c when
5006
PNG_FLOATING_ARITHMETIC is not supported (bug report by "zootus
5007
at users.sourceforge.net").
5009
Version 1.6.14beta03 [September 19, 2014]
5010
Define FE_DIVBYZERO, FE_INVALID, and FE_OVERFLOW in pngvalid.c if not
5011
already defined. Revert floating point exception handling in pngvalid.c
5012
to version 1.6.14beta01 behavior.
5014
Version 1.6.14beta04 [September 27, 2014]
5015
Fixed incorrect handling of the iTXt compression flag in pngrutil.c
5016
(bug report by Shunsaku Hirata). Bug was introduced in libpng-1.6.0.
5018
Version 1.6.14beta05 [October 1, 2014]
5019
Added "option READ_iCCP enables READ_COMPRESSED_TEXT" to pnglibconf.dfa
5021
Version 1.6.14beta06 [October 5, 2014]
5022
Removed unused "text_len" parameter from private function png_write_zTXt().
5023
Conditionally compile some code in png_deflate_claim(), when
5024
PNG_WARNINGS_SUPPORTED and PNG_ERROR_TEXT_SUPPORTED are disabled.
5025
Replaced repeated code in pngpread.c with PNG_PUSH_SAVE_BUFFER_IF_FULL.
5026
Added "chunk iTXt enables TEXT" and "chunk zTXt enables TEXT"
5028
Removed "option READ_COMPRESSED_TEXT enables READ_TEXT" from pnglibconf.dfa,
5029
to make it possible to configure a libpng that supports iCCP but not TEXT.
5031
Version 1.6.14beta07 [October 7, 2014]
5032
Removed "option WRITE_COMPRESSED_TEXT enables WRITE_TEXT" from pnglibconf.dfa
5033
Only mark text chunks as written after successfully writing them.
5035
Version 1.6.14rc01 [October 15, 2014]
5036
Fixed some typos in comments.
5038
Version 1.6.14rc02 [October 17, 2014]
5039
Changed png_convert_to_rfc_1123() to png_convert_to_rfc_1123_buffer()
5040
in the manual, to reflect the change made in libpng-1.6.0.
5041
Updated README file to explain that direct access to the png_struct
5042
and info_struct members has not been permitted since libpng-1.5.0.
5044
Version 1.6.14 [October 23, 2014]
5047
Version 1.6.15beta01 [October 29, 2014]
5048
Changed "if (!x)" to "if (x == 0)" and "if (x)" to "if (x != 0)"
5049
Simplified png_free_data().
5050
Added missing "ptr = NULL" after some instances of png_free().
5052
Version 1.6.15beta02 [November 1, 2014]
5053
Changed remaining "if (!x)" to "if (x == 0)" and "if (x)" to "if (x != 0)"
5055
Version 1.6.15beta03 [November 3, 2014]
5056
Added PNG_USE_ARM_NEON configuration flag (Marcin Juszkiewicz).
5058
Version 1.6.15beta04 [November 4, 2014]
5059
Removed new PNG_USE_ARM_NEON configuration flag and made a one-line
5060
revision to configure.ac to support ARM on aarch64 instead (John Bowler).
5062
Version 1.6.15beta05 [November 5, 2014]
5063
Use png_get_libpng_ver(NULL) instead of PNG_LIBPNG_VER_STRING in
5064
example.c, pngtest.c, and applications in the contrib directory.
5065
Fixed an out-of-range read in png_user_version_check() (Bug report from
5066
Qixue Xiao, CVE-2015-8540).
5067
Simplified and future-proofed png_user_version_check().
5068
Fixed GCC unsigned int->float warnings. Various versions of GCC
5069
seem to generate warnings when an unsigned value is implicitly
5070
converted to double. This is probably a GCC bug but this change
5071
avoids the issue by explicitly converting to (int) where safe.
5072
Free all allocated memory in pngimage. The file buffer cache was left
5073
allocated at the end of the program, harmless but it causes memory
5074
leak reports from clang.
5075
Fixed array size calculations to avoid warnings. At various points
5076
in the code the number of elements in an array is calculated using
5077
sizeof. This generates a compile time constant of type (size_t) which
5078
is then typically assigned to an (unsigned int) or (int). Some versions
5079
of GCC on 64-bit systems warn about the apparent narrowing, even though
5080
the same compiler does apparently generate the correct, in-range,
5081
numeric constant. This adds appropriate, safe, casts to make the
5084
Version 1.6.15beta06 [November 6, 2014]
5085
Reverted use png_get_libpng_ver(NULL) instead of PNG_LIBPNG_VER_STRING
5086
in the manual, example.c, pngtest.c, and applications in the contrib
5087
directory. It was incorrect advice.
5089
Version 1.6.15beta07 [November 7, 2014]
5090
Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is
5091
needed by png_reciprocal2().
5092
Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and
5094
Changed all "#endif /* PNG_FEATURE_SUPPORTED */" to "#endif /* FEATURE */"
5096
Version 1.6.15beta08 [November 8, 2014]
5097
More housecleaning in *.h
5099
Version 1.6.15rc01 [November 13, 2014]
5101
Version 1.6.15rc02 [November 14, 2014]
5102
The macros passed in the command line to Borland make were ignored if
5103
similarly-named macros were already defined in makefiles. This behavior
5104
is different from POSIX make and other make programs. Surround the
5105
macro definitions with ifndef guards (Cosmin).
5107
Version 1.6.15rc03 [November 16, 2014]
5108
Added "-D_CRT_SECURE_NO_WARNINGS" to CFLAGS in scripts/makefile.vcwin32.
5109
Removed the obsolete $ARCH variable from scripts/makefile.darwin.
5111
Version 1.6.15 [November 20, 2014]
5114
Version 1.6.16beta01 [December 14, 2014]
5115
Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that
5116
don't do alignment correctly.
5117
Revised Makefile.am and scripts/symbols.dfn to work with MinGW/MSYS
5120
Version 1.6.16beta02 [December 15, 2014]
5121
Revised Makefile.am and scripts/*.dfn again to work with MinGW/MSYS;
5122
renamed scripts/*.dfn to scripts/*.c (John Bowler).
5124
Version 1.6.16beta03 [December 21, 2014]
5125
Quiet a "comparison always true" warning in pngstest.c (John Bowler).
5127
Version 1.6.16rc01 [December 21, 2014]
5128
Restored a test on width that was removed from png.c at libpng-1.6.9
5129
(Bug report by Alex Eubanks, CVE-2015-0973).
5131
Version 1.6.16rc02 [December 21, 2014]
5132
Undid the update to pngrutil.c in 1.6.16rc01.
5134
Version 1.6.16rc03 [December 21, 2014]
5135
Fixed an overflow in png_combine_row() with very wide interlaced images
5136
(Bug report and fix by John Bowler, CVE-2014-9495).
5138
Version 1.6.16 [December 22, 2014]
5141
Version 1.6.17beta01 [January 29, 2015]
5142
Removed duplicate PNG_SAFE_LIMITS_SUPPORTED handling from pngconf.h
5143
Corrected the width limit calculation in png_check_IHDR().
5144
Removed user limits from pngfix. Also pass NULL pointers to
5145
png_read_row to skip the unnecessary row de-interlace stuff.
5146
Added testing of png_set_packing() to pngvalid.c
5147
Regenerated configure scripts in the *.tar distributions with libtool-2.4.4
5148
Implement previously untested cases of libpng transforms in pngvalid.c
5149
Fixed byte order in png_do_read_filler() with 16-bit input. Previously
5150
the high and low bytes of the filler, from png_set_filler() or from
5151
png_set_add_alpha(), were read in the wrong order.
5152
Made the check for out-of-range values in png_set_tRNS() detect
5153
values that are exactly 2^bit_depth, and work on 16-bit platforms.
5154
Merged some parts of libpng-1.6.17beta01 and libpng-1.7.0beta47.
5155
Added #ifndef __COVERITY__ where needed in png.c, pngrutil.c and
5156
pngset.c to avoid warnings about dead code.
5157
Added "& 0xff" to many instances of expressions that are typecast
5158
to (png_byte), to avoid Coverity warnings.
5160
Version 1.6.17beta02 [February 7, 2015]
5161
Work around one more Coverity-scan dead-code warning.
5162
Do not build png_product2() when it is unused.
5164
Version 1.6.17beta03 [February 17, 2015]
5165
Display user limits in the output from pngtest.
5166
Eliminated the PNG_SAFE_LIMITS macro and restored the 1-million-column
5167
and 1-million-row default limits in pnglibconf.dfa, that can be reset
5168
by the user at build time or run time. This provides a more robust
5169
defense against DOS and as-yet undiscovered overflows.
5171
Version 1.6.17beta04 [February 21, 2015]
5172
Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default.
5173
Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins).
5174
Rebuilt configure scripts with automake-1.15 and libtool-2.4.6
5176
Version 1.6.17beta05 [February 25, 2015]
5177
Restored compiling of png_reciprocal2 with PNG_NO_16BIT.
5179
Version 1.6.17beta06 [February 27, 2015]
5180
Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block
5182
Avoid runtime checks when converting integer to png_byte with
5183
Visual Studio (Sergey Kosarevsky)
5185
Version 1.6.17rc01 [March 4, 2015]
5188
Version 1.6.17rc02 [March 9, 2015]
5189
Removed some comments that the configure script did not handle
5190
properly from scripts/pnglibconf.dfa and pnglibconf.h.prebuilt.
5191
Free the unknown_chunks structure even when it contains no data.
5193
Version 1.6.17rc03 [March 12, 2015]
5194
Updated CMakeLists.txt to add OSX framework, change YES/NO to ON/OFF
5195
for consistency, and remove some useless tests (Alexey Petruchik).
5197
Version 1.6.17rc04 [March 16, 2015]
5198
Remove pnglibconf.h, pnglibconf.c, and pnglibconf.out instead of
5199
pnglibconf.* in "make clean" (Cosmin).
5200
Fix bug in calculation of maxbits, in png_write_sBIT, introduced
5201
in libpng-1.6.17beta01 (John Bowler).
5203
Version 1.6.17rc05 [March 21, 2015]
5204
Define PNG_FILTER_* and PNG_FILTER_VALUE_* in png.h even when WRITE
5205
is not supported (John Bowler). This fixes an error introduced in
5206
libpng-1.6.17beta06.
5207
Reverted "& 0xff" additions of version 1.6.17beta01. Libpng passes
5208
the Coverity scan without them.
5210
Version 1.6.17rc06 [March 23, 2015]
5211
Remove pnglibconf.dfn and pnglibconf.pre with "make clean".
5212
Reformatted some "&0xff" instances to "& 0xff".
5213
Fixed simplified 8-bit-linear to sRGB alpha. The calculated alpha
5214
value was wrong. It's not clear if this affected the final stored
5215
value; in the obvious code path the upper and lower 8-bits of the
5216
alpha value were identical and the alpha was truncated to 8-bits
5217
rather than dividing by 257 (John Bowler).
5219
Version 1.6.17 [March 26, 2015]
5222
Version 1.6.18beta01 [April 1, 2015]
5223
Removed PNG_SET_CHUNK_[CACHE|MALLOC]_LIMIT_SUPPORTED macros. They
5224
have been combined with PNG_SET_USER_LIMITS_SUPPORTED (resolves
5225
bug report by Andrew Church).
5226
Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c. This
5227
fixes some arithmetic errors that caused some tests to fail on
5228
some 32-bit platforms (Bug reports by Peter Breitenlohner [i686]
5229
and Petr Gajdos [i586]).
5231
Version 1.6.18beta02 [April 26, 2015]
5232
Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler
5233
(Bug report by Viktor Szakats).
5235
Version 1.6.18beta03 [May 6, 2015]
5236
Replaced "unexpected" with an integer (0xabadca11) in pngset.c
5237
where a long was expected, to avoid a compiler warning when PNG_DEBUG > 1.
5238
Added contrib/examples/simpleover.c, to demonstrate how to handle
5239
alpha compositing of multiple images, using the "simplified API"
5240
and an example PNG generation tool, contrib/examples/genpng.c
5243
Version 1.6.18beta04 [May 20, 2015]
5244
PNG_RELEASE_BUILD replaces tests where the code depended on the build base
5245
type and can be defined on the command line, allowing testing in beta
5246
builds (John Bowler).
5247
Avoid Coverity issue 80858 (REVERSE NULL) in pngtest.c PNG_DEBUG builds.
5248
Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug
5249
report from Christopher Ferris).
5251
Version 1.6.18beta05 [May 31, 2015]
5252
Backport filter selection code from libpng-1.7.0beta51, to combine
5253
sub_row, up_row, avg_row, and paeth_row into try_row and tst_row.
5254
Changed png_voidcast(), etc., to voidcast(), etc., in contrib/tools/pngfix.c
5255
to avoid confusion with the libpng private macros.
5256
Fixed old cut&paste bug in the weighted filter selection code in
5257
pngwutil.c, introduced in libpng-0.95, March 1997.
5259
Version 1.6.18beta06 [June 1, 2015]
5260
Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the
5261
compiled library size. It never worked properly and as far as we can
5262
tell, no one uses it. The png_set_filter_heuristics() and
5263
png_set_filter_heuristics_fixed() APIs are retained but deprecated
5266
Version 1.6.18beta07 [June 6, 2015]
5267
Removed non-working progressive reader 'skip' function. This
5268
function has apparently never been used. It was implemented
5269
to support back-door modification of png_struct in libpng-1.4.x
5270
but (because it does nothing and cannot do anything) was apparently
5271
never tested (John Bowler).
5272
Fixed cexcept.h in which GCC 5 now reports that one of the auto
5273
variables in the Try macro needs to be volatile to prevent value
5274
being lost over the setjmp (John Bowler).
5275
Fixed NO_WRITE_FILTER and -Wconversion build breaks (John Bowler).
5276
Fix g++ build breaks (John Bowler).
5277
Quieted some Coverity issues in pngfix.c, png-fix-itxt.c, pngvalid.c,
5278
pngstest.c, and pngimage.c. Most seem harmless, but png-fix-itxt
5279
would only work with iTXt chunks with length 255 or less.
5280
Added #ifdef's to contrib/examples programs so people don't try
5281
to compile them without the minimum required support enabled
5282
(suggested by Flavio Medeiros).
5284
Version 1.6.18beta08 [June 30, 2015]
5285
Eliminated the final two Coverity defects (insecure temporary file
5286
handling in contrib/libtests/pngstest.c; possible overflow of
5287
unsigned char in contrib/tools/png-fix-itxt.c). To use the "secure"
5288
file handling, define PNG_USE_MKSTEMP, otherwise "tmpfile()" will
5290
Removed some unused WEIGHTED_FILTER macros from png.h and pngstruct.h
5292
Version 1.6.18beta09 [July 5, 2015]
5293
Removed some useless typecasts from contrib/tools/png-fix-itxt.c
5294
Fixed a new signed-unsigned comparison in pngrtran.c (Max Stepin).
5295
Replaced arbitrary use of 'extern' with #define PNG_LINKAGE_*. To
5296
preserve API compatibility, the new defines all default to "extern"
5297
(requested by Jan Nijtmans).
5299
Version 1.6.18rc01 [July 9, 2015]
5300
Belatedly added Mans Rullgard and James Yu to the list of Contributing
5303
Version 1.6.18rc02 [July 12, 2015]
5304
Restored unused FILTER_HEURISTIC macros removed at libpng-1.6.18beta08
5305
to png.h to avoid compatibility warnings.
5307
Version 1.6.18rc03 [July 15, 2015]
5308
Minor changes to the man page
5310
Version 1.6.18 [July 23, 2015]
5313
Version 1.6.19beta01 [July 30, 2015]
5314
Updated obsolete information about the simplified API macros in the
5315
manual pages (Bug report by Arc Riley).
5316
Avoid potentially dereferencing NULL info_ptr in png_info_init_3().
5317
Rearranged png.h to put the major sections in the same order as
5319
Eliminated unused PNG_COST_SHIFT, PNG_WEIGHT_SHIFT, PNG_COST_FACTOR, and
5320
PNG_WEIGHT_FACTOR macros.
5321
Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler
5322
(Bug report by Viktor Szakats). Several warnings remain and are
5323
unavoidable, where we test for overflow.
5324
Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c
5325
Fixed uninitialized variable in contrib/gregbook/rpng2-x.c
5327
Version 1.6.19beta02 [August 19, 2015]
5328
Moved config.h.in~ from the "libpng_autotools_files" list to the
5329
"libpng_autotools_extra" list in autogen.sh because it was causing a
5330
false positive for missing files (bug report by Robert C. Seacord).
5331
Removed unreachable "break" statements in png.c, pngread.c, and pngrtran.c
5332
to suppress clang warnings (Bug report by Viktor Szakats).
5333
Fixed some bad links in the man page.
5334
Changed "n bit" to "n-bit" in comments.
5335
Added signed/unsigned 16-bit safety net. This removes the dubious
5336
0x8000 flag definitions on 16-bit systems. They aren't supported
5337
yet the defs *probably* work, however it seems much safer to do this
5338
and be advised if anyone, contrary to advice, is building libpng 1.6
5339
on a 16-bit system. It also adds back various switch default clauses
5340
for GCC; GCC errors out if they are not present (with an appropriately
5341
high level of warnings).
5342
Safely convert num_bytes to a png_byte in png_set_sig_bytes() (Robert
5344
Fixed the recently reported 1's complement security issue by replacing
5345
the value that is illegal in the PNG spec, in both signed and unsigned
5346
values, with 0. Illegal unsigned values (anything greater than or equal
5347
to 0x80000000) can still pass through, but since these are not illegal
5348
in ANSI-C (unlike 0x80000000 in the signed case) the checking that
5349
occurs later can catch them (John Bowler).
5351
Version 1.6.19beta03 [September 26, 2015]
5352
Fixed png_save_int_32 when int is not 2's complement (John Bowler).
5353
Updated libpng16 with all the recent test changes from libpng17,
5354
including changes to pngvalid.c to ensure that the original,
5355
distributed, version of contrib/visupng/cexcept.h can be used
5357
pngvalid contains the correction to the use of SAVE/STORE_
5358
UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7. More
5359
tests contain the --strict option to detect warnings and the
5360
pngvalid-standard test has been corrected so that it does not
5361
turn on progressive-read. There is a separate test which does
5363
Also made some signed/unsigned fixes.
5364
Make pngstest error limits version specific. Splitting the machine
5365
generated error structs out to a file allows the values to be updated
5366
without changing pngstest.c itself. Since libpng 1.6 and 1.7 have
5367
slightly different error limits this simplifies maintenance. The
5368
makepngs.sh script has also been updated to more accurately reflect
5369
current problems in libpng 1.7 (John Bowler).
5370
Incorporated new test PNG files into make check. tests/pngstest-*
5371
are changed so that the new test files are divided into 8 groups by
5372
gamma and alpha channel. These tests have considerably better code
5373
and pixel-value coverage than contrib/pngsuite; however,coverage is
5374
still incomplete (John Bowler).
5375
Removed the '--strict' in 1.6 because of the double-gamma-correction
5376
warning, updated pngstest-errors.h for the errors detected with the
5377
new contrib/testspngs PNG test files (John Bowler).
5379
Version 1.6.19beta04 [October 15, 2015]
5380
Worked around rgb-to-gray issues in libpng 1.6. The previous
5381
attempts to ignore the errors in the code aren't quite enough to
5382
deal with the 'channel selection' encoding added to libpng 1.7; abort.
5383
pngvalid.c is changed to drop this encoding in prior versions.
5384
Fixed 'pow' macros in pngvalid.c. It is legal for 'pow' to be a
5385
macro, therefore the argument list cannot contain preprocessing
5386
directives. Make sure pow is a function where this happens. This is
5387
a minimal safe fix, the issue only arises in non-performance-critical
5388
code (bug report by Curtis Leach, fix by John Bowler).
5389
Added sPLT support to pngtest.c
5391
Version 1.6.19rc01 [October 23, 2015]
5394
Version 1.6.19rc02 [October 31, 2015]
5395
Prevent setting or writing over-length PLTE chunk (Cosmin Truta).
5396
Silently truncate over-length PLTE chunk while reading.
5397
Libpng incorrectly calculated the output rowbytes when the application
5398
decreased either the number of channels or the bit depth (or both) in
5399
a user transform. This was safe; libpng overallocated buffer space
5400
(potentially by quite a lot; up to 4 times the amount required) but,
5401
from 1.5.4 on, resulted in a png_error (John Bowler).
5403
Version 1.6.19rc03 [November 3, 2015]
5404
Fixed some inconsequential cut-and-paste typos in png_set_cHRM_XYZ_fixed().
5405
Clarified COPYRIGHT information to state explicitly that versions
5406
are derived from previous versions.
5407
Removed much of the long list of previous versions from png.h and
5410
Version 1.6.19rc04 [November 5, 2015]
5411
Fixed new bug with CRC error after reading an over-length palette
5412
(bug report by Cosmin Truta) (CVE-2015-8126).
5414
Version 1.6.19 [November 12, 2015]
5415
Cleaned up coding style in png_handle_PLTE().
5417
Version 1.6.20beta01 [November 20, 2015]
5418
Avoid potential pointer overflow/underflow in png_handle_sPLT() and
5419
png_handle_pCAL() (Bug report by John Regehr).
5421
Version 1.6.20beta02 [November 23, 2015]
5422
Fixed incorrect implementation of png_set_PLTE() that uses png_ptr
5423
not info_ptr, that left png_set_PLTE() open to the CVE-2015-8126
5424
vulnerability. Fixes CVE-2015-8472.
5426
Version 1.6.20beta03 [November 24, 2015]
5427
Backported tests from libpng-1.7.0beta69.
5429
Version 1.6.20rc01 [November 26, 2015]
5430
Fixed an error in handling of bad zlib CMINFO field in pngfix, found by
5431
American Fuzzy Lop, reported by Brian Carpenter. inflate() doesn't
5432
immediately fault a bad CMINFO field; instead a 'too far back' error
5433
happens later (at least some times). pngfix failed to limit CMINFO to
5434
the allowed values but then assumed that window_bits was in range,
5435
triggering an assert. The bug is mostly harmless; the PNG file cannot
5438
Version 1.6.20rc02 [November 29, 2015]
5439
In libpng 1.6 zlib initialization was changed to use the window size
5440
in the zlib stream, not a fixed value. This causes some invalid images,
5441
where CINFO is too large, to display 'correctly' if the rest of the
5442
data is valid. This provides a workaround for zlib versions where the
5443
error arises (ones that support the API change to use the window size
5446
Version 1.6.20 [December 3, 2015]
5449
Version 1.6.21beta01 [December 11, 2015]
5450
Fixed syntax "$(command)" in tests/pngstest that some shells other than
5451
bash could not parse (Bug report by Nelson Beebe). Use `command` instead.
5453
Version 1.6.21beta02 [December 14, 2015]
5454
Moved png_check_keyword() from pngwutil.c to pngset.c
5455
Removed LE/BE dependencies in pngvalid, to 'fix' the current problem
5456
in the BigEndian tests by not testing it, making the BE code the same
5458
Fixes to pngvalid for various reduced build configurations (eliminate unused
5459
statics) and a fix for the case in rgb_to_gray when the digitize option
5460
reduces graylo to 0, producing a large error.
5462
Version 1.6.21beta03 [December 18, 2015]
5463
Widened the 'limit' check on the internally calculated error limits in
5464
the 'DIGITIZE' case (the code used prior to 1.7 for rgb_to_gray error
5465
checks) and changed the check to only operate in non-release builds
5466
(base build type not RC or RELEASE.)
5467
Fixed undefined behavior in pngvalid.c, undefined because
5468
(png_byte) << shift is undefined if it changes the signed bit
5469
(because png_byte is promoted to int). The libpng exported functions
5470
png_get_uint_32 and png_get_uint_16 handle this. (Bug reported by
5471
David Drysdale as a result of reports from UBSAN in clang 3.8).
5472
This changes pngvalid to use BE random numbers; this used to produce
5473
errors but these should not be fixed as a result of the previous changes.
5475
Version 1.6.21rc01 [January 4, 2016]
5476
In projects/vstudio, combined readme.txt and WARNING into README.txt
5478
Version 1.6.21rc02 [January 7, 2016]
5479
Relocated assert() in contrib/tools/pngfix.c, bug found by American
5480
Fuzzy Lop, reported by Brian Carpenter.
5481
Marked 'limit' UNUSED in transform_range_check(). This only affects
5484
Version 1.6.21 [January 15, 2016]
5485
Worked around a false-positive Coverity issue in pngvalid.c.
5487
Version 1.6.22beta01 [January 23, 2016]
5488
Changed PNG_USE_MKSTEMP to __COVERITY__ to select alternate
5489
"tmpfile()" implementation in contrib/libtests/pngstest.c
5490
Fixed NO_STDIO build of pngunknown.c to skip calling png_init_io()
5491
if there is no stdio.h support.
5492
Added a png_image_write_to_memory() API and a number of assist macros
5493
to allow an application that uses the simplified API write to bypass
5494
stdio and write directly to memory.
5495
Added some warnings (png.h) and some check code to detect *possible*
5496
overflow in the ROW_STRIDE and simplified image SIZE macros. This
5497
disallows image width/height/format that *might* overflow. This is
5498
a quiet API change that limits in-memory image size (uncompressed) to
5499
less than 4GByte and image row size (stride) to less than 2GByte.
5500
Revised workaround for false-positive Coverity issue in pngvalid.c.
5502
Version 1.6.22beta02 [February 8, 2016]
5503
Only use exit(77) in configure builds.
5504
Corrected error in PNG_IMAGE_PNG_SIZE_MAX. This new macro underreported
5505
the palette size because it failed to take into account that the memory
5506
palette has to be expanded to full RGB when it is written to PNG.
5507
Updated CMakeLists.txt, added supporting scripts/gen*.cmake.in
5508
and test.cmake.in (Roger Leigh).
5509
Relaxed limit checks on gamma values in pngrtran.c. As suggested in
5510
the comments gamma values outside the range currently permitted
5511
by png_set_alpha_mode are useful for HDR data encoding. These values
5512
are already permitted by png_set_gamma so it is reasonable caution to
5513
extend the png_set_alpha_mode range as HDR imaging systems are starting
5516
Version 1.6.22beta03 [March 9, 2016]
5517
Added a common-law trademark notice and export control information
5518
to the LICENSE file, png.h, and the man page.
5519
Restored "& 0xff" in png_save_uint_16() and png_save_uint_32() that
5520
were accidentally removed from libpng-1.6.17.
5521
Changed PNG_INFO_cHNK and PNG_FREE_cHNK from 0xnnnn to 0xnnnnU in png.h
5522
(Robert C. Seacord).
5523
Removed dubious "#if INT_MAX" test from png.h that was added to
5524
libpng-1.6.19beta02 (John Bowler).
5525
Add ${INCLUDES} in scripts/genout.cmake.in (Bug report by Nixon Kwok).5526
Updated LICENSE to say files in the contrib directory are not
5527
necessarily under the libpng license, and that some makefiles have
5528
other copyright owners.
5529
Added INTEL-SSE2 support (Mike Klein and Matt Sarett, Google, Inc.).
5530
Made contrib/libtests/timepng more robust. The code no longer gives
5531
up/fails on invalid PNG data, it just skips it (with error messages).
5532
The code no longer fails on PNG files with data beyond IEND. Options
5533
exist to use png_read_png (reading the whole image, not by row) and, in
5534
that case, to apply any of the supported transforms. This makes for
5535
more realistic testing; the decoded data actually gets used in a
5536
meaningful fashion (John Bowler).
5537
Fixed some misleading indentation (Krishnaraj Bhat).
5539
Version 1.6.22beta04 [April 5, 2016]
5540
Force GCC compilation to C89 if needed (Dagobert Michelsen).
5541
SSE filter speed improvements for bpp=3:
5542
memcpy-free implementations of load3() / store3().
5543
call load3() only when needed at the end of a scanline.
5545
Version 1.6.22beta05 [April 27, 2016]
5546
Added PNG_FAST_FILTERS macro (defined as
5547
PNG_FILTER_NONE|PNG_FILTER_SUB|PNG_FILTER_UP).
5548
Various fixes for contrib/libtests/timepng.c
5549
Moved INTEL-SSE code from pngpriv.h into contrib/intel/intel_sse.patch.
5550
Fixed typo (missing underscore) in #define PNG_READ_16_TO_8_SUPPORTED
5551
(Bug report by Y.Ohashik).
5553
Version 1.6.22beta06 [May 5, 2016]
5554
Rebased contrib/intel_sse.patch.
5555
Quieted two Coverity issues in contrib/libtests/timepng.c.
5556
Fixed issues with scripts/genout.cmake.in (David Capello, Nixon Kwok):
5557
Added support to use multiple directories in ZLIBINCDIR variable,
5558
Fixed CMAKE_C_FLAGS with multiple values when genout is compiled on MSVC,
5559
Fixed pnglibconf.c compilation on OS X including the sysroot path.
5561
Version 1.6.22rc01 [May 14, 2016]
5564
Version 1.6.22rc02 [May 16, 2016]
5565
Removed contrib/timepng from default build; it does not build on platforms
5566
that don't supply clock_gettime().
5568
Version 1.6.22rc03 [May 17, 2016]
5569
Restored contrib/timepng to default build but check for the presence
5570
of clock_gettime() in configure.ac and Makefile.am.
5572
Version 1.6.22 [May 26, 2016]
5575
Version 1.6.23beta01 [May 29, 2016]
5576
Stop a potential memory leak in png_set_tRNS() (Bug report by Ted Ying).
5577
Fixed the progressive reader to handle empty first IDAT chunk properly
5578
(patch by Timothy Nikkel). This bug was introduced in libpng-1.6.0 and
5579
only affected the libpng16 branch.
5580
Added tests in pngvalid.c to check zero-length IDAT chunks in various
5581
positions. Fixed the sequential reader to handle these more robustly
5584
Version 1.6.23rc01 [June 2, 2016]
5585
Corrected progressive read input buffer in pngvalid.c. The previous version
5586
the code invariably passed just one byte at a time to libpng. The intent
5587
was to pass a random number of bytes in the range 0..511.
5588
Moved sse2 prototype from pngpriv.h to contrib/intel/intel_sse.patch.
5589
Added missing ")" in pngerror.c (Matt Sarrett).
5591
Version 1.6.23rc02 [June 4, 2016]
5592
Fixed undefined behavior in png_push_save_buffer(). Do not call
5593
memcpy() with a null source, even if count is zero (Leon Scroggins III).
5595
Version 1.6.23 [June 9, 2016]
5596
Fixed bad link to RFC2083 in png.5 (Nikola Forro).
5598
Version 1.6.24beta01 [June 11, 2016]
5599
Avoid potential overflow of the PNG_IMAGE_SIZE macro. This macro
5600
is not used within libpng, but is used in some of the examples.
5602
Version 1.6.24beta02 [June 23, 2016]
5603
Correct filter heuristic overflow handling. This was broken when the
5604
write filter code was moved out-of-line; if there is a single filter and
5605
the heuristic sum overflows the calculation of the filtered line is not
5606
completed. In versions prior to 1.6 the code was duplicated in-line
5607
and the check not performed, so the filter operation completed; however,
5608
in the multi-filter case where the sum is performed the 'none' filter would
5609
be selected if all the sums overflowed, even if it wasn't in the filter
5610
list. The fix to the first problem is simply to provide PNG_SIZE_MAX as
5611
the current lmins sum value; this means the sum can never exceed it and
5612
overflows silently. A reasonable compiler that does choose to inline
5613
the code will simply eliminate the sum check.
5614
The fix to the second problem is to use high precision arithmetic (this is
5615
implemented in 1.7), however a simple safe fix here is to chose the lowest
5616
numbered filter in the list from png_set_filter (this only works if the
5617
first problem is also fixed) (John Bowler).
5618
Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois).
5619
Fixed the case where PNG_IMAGE_BUFFER_SIZE can overflow in the application
5620
as a result of the application using an increased 'row_stride'; previously
5621
png_image_finish_read only checked for overflow on the base calculation of
5622
components. (I.e. it checked for overflow of a 32-bit number on the total
5623
number of pixel components in the output format, not the possibly padded row
5624
length and not the number of bytes, which for linear formats is twice the
5625
number of components.)
5626
MSVC does not like '-(unsigned)', so replaced it with 0U-(unsigned)
5627
MSVC does not like (uInt) = -(unsigned) (i.e. as an initializer), unless
5628
the conversion is explicitly invoked by a cast.
5629
Put the SKIP definition in the correct place. It needs to come after the
5630
png.h include (see all the other .c files in contrib/libtests) because it
5631
depends on PNG_LIBPNG_VER.
5632
Removed the three compile warning options from the individual project
5633
files into the zlib.props globals. It increases the warning level from 4
5634
to All and adds a list of the warnings that need to be turned off. This is
5635
semi-documentary; the intent is to tell libpng users which warnings have
5636
been examined and judged non-fixable at present. The warning about
5637
structure padding is fixable, but it would be a significant change (moving
5638
structure members around).
5640
Version 1.6.24beta03 [July 4, 2016]
5641
Optimized absolute value calculation in filter selection, similar to
5642
code in the PAETH decoder in pngrutil.c. Build with PNG_USE_ABS to
5644
Added pngcp to the build together with a pngcp.dfa configuration test.
5645
Added high resolution timing to pngcp.
5646
Added "Common linking failures" section to INSTALL.
5647
Relocated misplaced #endif in png.c sRGB profile checking.
5648
Fixed two Coverity issues in pngcp.c.
5650
Version 1.6.24beta04 [July 8, 2016]
5651
Avoid filter-selection heuristic sum calculations in cases where only one
5652
filter is a candidate for selection. This trades off code size (added
5653
private png_setup_*_row_only() functions) for speed.
5655
Version 1.6.24beta05 [July 13, 2016]
5656
Fixed some indentation to comply with our coding style.
5657
Added contrib/tools/reindent.
5659
Version 1.6.24beta06 [July 18, 2016]
5660
Fixed more indentation to comply with our coding style.
5661
Eliminated unnecessary tests of boolean png_isaligned() vs 0.
5663
Version 1.6.24rc01 [July 25, 2016]
5666
Version 1.6.24rc02 [August 1, 2016]
5667
Conditionally compile SSE2 headers in contrib/intel/intel_sse.patch
5668
Conditionally compile png_decompress_chunk().
5670
Version 1.6.24rc03 [August 2, 2016]
5671
Conditionally compile ARM_NEON headers in pngpriv.h
5672
Updated contrib/intel/intel_sse.patch
5674
Version 1.6.24[August 4, 2016]
5677
Version 1.6.25beta01 [August 12, 2016]
5678
Reject oversized iCCP profile immediately.
5679
Cleaned up PNG_DEBUG compile of pngtest.c.
5680
Conditionally compile png_inflate().
5682
Version 1.6.25beta02 [August 18, 2016]
5683
Don't install pngcp; it conflicts with pngcp in the pngtools package.
5684
Minor editing of INSTALL, (whitespace, added copyright line)
5686
Version 1.6.25rc01 [August 24, 2016]
5689
Version 1.6.25rc02 [August 29, 2016]
5690
Added MIPS support (Mandar Sahastrabuddhe <Mandar.Sahastrabuddhe@imgtec.com>).
5691
Only the UP filter is currently implemented.
5693
Version 1.6.25rc03 [August 29, 2016]
5694
Rebased contrib/intel/intel_sse.patch after the MIPS implementation.
5696
Version 1.6.25rc04 [August 30, 2016]
5697
Added MIPS support for SUB, AVG, and PAETH filters (Mandar Sahastrabuddhe).
5699
Version 1.6.25rc05 [August 30, 2016]
5700
Rebased contrib/intel/intel_sse.patch after the MIPS implementation update..
5702
Version 1.6.25 [September 1, 2016]
5705
Version 1.6.26beta01 [September 26, 2016]
5706
Fixed handling zero length IDAT in pngfix (bug report by Agostino Sarubbo,
5707
bugfix by John Bowler).
5708
Do not issue a png_error() on read in png_set_pCAL() because png_handle_pCAL
5709
has allocated memory that libpng needs to free.
5710
Conditionally compile png_set_benign_errors() in pngread.c and pngtest.c
5711
Issue a png_benign_error instead of a png_error on ADLER32 mismatch
5712
while decoding compressed data chunks.
5713
Changed PNG_ZLIB_VERNUM to ZLIB_VERNUM in pngpriv.h, pngstruct.h, and
5715
If CRC handling of critical chunks has been set to PNG_CRC_QUIET_USE,
5716
ignore the ADLER32 checksum in the IDAT chunk as well as the chunk CRCs.
5717
Issue png_benign_error() on ADLER32 checksum mismatch instead of png_error().
5718
Add tests/badcrc.png and tests/badadler.png to tests/pngtest.
5719
Merged pngtest.c with libpng-1.7.0beta84/pngtest.c
5721
Version 1.6.26beta02 [October 1, 2016]
5722
Updated the documentation about CRC and ADLER32 handling.
5723
Quieted 117 warnings from clang-3.8 in pngtrans.c, pngread.c,
5724
pngwrite.c, pngunknown.c, and pngvalid.c.
5725
Quieted 58 (out of 144) -Wconversion compiler warnings by changing
5726
flag definitions in pngpriv.h from 0xnnnn to 0xnnnnU and trivial changes
5727
in png.c, pngread.c, and pngwutil.c.
5729
Version 1.6.26beta03 [October 2, 2016]
5730
Removed contrib/libtests/*.orig and *.rej that slipped into the tarballs.
5731
Quieted the 86 remaining -Wconversion compiler warnings by
5732
revising the png_isaligned() macro and trivial changes in png.c,
5733
pngerror.c, pngget.c, pngmem.c, pngset.c, pngrtran.c, pngrutil.c,
5734
pngwtran.c, pngwrite.c, and pngwutil.c.
5736
Version 1.6.26beta04 [October 3, 2016]
5737
Quieted (bogus?) clang warnings about "absolute value has no effect"
5738
when PNG_USE_ABS is defined.
5739
Fixed offsets in contrib/intel/intel_sse.patch
5741
Version 1.6.26beta05 [October 6, 2016]
5742
Changed integer constant 4294967294 to unsigned 4294967294U in pngconf.h
5743
to avoid a signed/unsigned compare in the preprocessor.
5745
Version 1.6.26beta06 [October 7, 2016]
5746
Use zlib-1.2.8.1 inflateValidate() instead of inflateReset2() to
5747
optionally avoid ADLER32 evaluation.
5749
Version 1.6.26rc01 [October 12, 2016]
5752
Version 1.6.26 [October 20, 2016]
5753
Cosmetic change, "ptr != 0" to "ptr != NULL" in png.c and pngrutil.c
5754
Despammed email addresses (replaced "@" with " at ").
5756
Version 1.6.27beta01 [November 2, 2016]
5757
Restrict the new ADLER32-skipping to IDAT chunks. It broke iCCP chunk
5758
handling: an erroneous iCCP chunk would throw a png_error and reject the
5759
entire PNG image instead of rejecting just the iCCP chunk with a warning,
5760
if built with zlib-1.2.8.1.
5762
Version 1.6.27rc01 [December 27, 2016]
5763
Control ADLER32 checking with new PNG_IGNORE_ADLER32 option. Fixes
5764
an endless loop when handling erroneous ADLER32 checksums; bug
5765
introduced in libpng-1.6.26.
5766
Removed the use of a macro containing the pre-processor 'defined'
5767
operator. It is unclear whether this is valid; a macro that
5768
"generates" 'defined' is not permitted, but the use of the word
5769
"generates" within the C90 standard seems to imply more than simple
5770
substitution of an expression itself containing a well-formed defined
5772
Added ARM support to CMakeLists.txt (Andreas Franek).
5774
Version 1.6.27 [December 29, 2016]
5775
Fixed a potential null pointer dereference in png_set_text_2() (bug report
5776
and patch by Patrick Keshishian, CVE-2016-10087).
5778
Version 1.6.28rc01 [January 3, 2017]
5779
Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna).
5780
Added option to Cmake build allowing a custom location of zlib to be
5781
specified in a scenario where libpng is being built as a subproject
5782
alongside zlib by another project (Sam Serrels).
5783
Changed png_ptr->options from a png_byte to png_uint_32, to accommodate
5786
Version 1.6.28rc02 [January 4, 2017]
5787
Added "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna).
5788
Moved SSE2 optimization code into the main libpng source directory.
5789
Configure libpng with "configure --enable-intel-sse" or compile
5790
libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it.
5792
Version 1.6.28rc03 [January 4, 2017]
5793
Backed out the SSE optimization and last CMakeLists.txt to allow time for QA.
5795
Version 1.6.28 [January 5, 2017]
5798
Version 1.6.29beta01 [January 12, 2017]
5799
Readded "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna).
5800
Moved SSE2 optimization code into the main libpng source directory.
5801
Configure libpng with "configure --enable-intel-sse" or compile
5802
libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it.
5803
Simplified conditional compilation in pngvalid.c, for AIX (Michael Felt).
5805
Version 1.6.29beta02 [February 22, 2017]
5806
Avoid conditional directives that break statements in pngrutil.c (Romero
5808
The contrib/examples/pngtopng.c recovery code was in the wrong "if"
5809
branches; the comments were correct.
5810
Added code for PowerPC VSX optimisation (Vadim Barkov).
5812
Version 1.6.29beta03 [March 1, 2017]
5813
Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer).
5814
Change test ZLIB_VERNUM >= 0x1281 to ZLIB_VERNUM >= 0x1290 in pngrutil.c
5815
because Solaris 11 distributes zlib-1.2.8.f that is older than 1.2.8.1,
5816
as suggested in zlib FAQ, item 24.
5817
Suppress clang warnings about implicit sign changes in png.c
5819
Version 1.6.29 [March 16, 2017]
5822
Version 1.6.30beta01 [April 1, 2017]
5823
Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in
5824
makefile.linux and makefile.solaris-x86 (Cosmin).
5825
Revised documentation of png_get_error_ptr() in the libpng manual.
5826
Silence clang -Wcomma and const drop warnings (Viktor Szakats).
5827
Update Sourceforge URLs in documentation (https instead of http).
5829
Version 1.6.30beta02 [April 22, 2017]
5830
Document need to check for integer overflow when allocating a pixel
5831
buffer for multiple rows in contrib/gregbook, contrib/pngminus,
5832
example.c, and in the manual (suggested by Jaeseung Choi). This
5833
is similar to the bug reported against pngquant in CVE-2016-5735.
5834
Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation.
5836
Version 1.6.30beta03 [May 22, 2017]
5837
Check for integer overflow in contrib/visupng and contrib/tools/genpng.
5838
Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt.
5839
Test CMAKE_HOST_WIN32 instead of WIN32 in CMakeLists.txt.
5840
Fix some URL in documentation.
5842
Version 1.6.30beta04 [June 7, 2017]
5843
Avoid writing an empty IDAT when the last IDAT exactly fills the
5844
compression buffer (bug report by Brian Baird). This bug was
5845
introduced in libpng-1.6.0.
5847
Version 1.6.30rc01 [June 14, 2017]
5850
Version 1.6.30rc02 [June 25, 2017]
5851
Update copyright year in pnglibconf.h, make ltmain.sh executable.
5852
Add a reference to the libpng.download site in README.
5854
Version 1.6.30 [June 28, 2017]
5857
Version 1.6.31beta01 [July 5, 2017]
5858
Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it;
5859
bug report by Michael Felt).
5860
Revised pngpriv.h to work around failure to compile arm/filter_neon.S
5861
("typedef" directive is unrecognized by the assembler). The problem5862
was introduced in libpng-1.6.30beta01.
5863
Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx).
5864
Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish).
5866
Version 1.6.31beta02 [July 8, 2017]
5867
Added instructions for disabling hardware optimizations in INSTALL.
5868
Added "--enable-hardware-optimizations" configuration flag to enable
5869
or disable all hardware optimizations with one flag.
5871
Version 1.6.31beta03 [July 9, 2017]
5872
Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms.
5873
Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent
5874
possible integer overflow (Bug report by John Bowler).
5875
Quieted "declaration after statement" warnings in intel/filter_sse2.c.
5876
Added scripts/makefile-linux-opt, which has hardware optimizations enabled.
5878
Version 1.6.31beta04 [July 11, 2017]
5879
Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when
5880
integers appear on both sides of a compare. Worked around the others by
5881
forcing the strict-overflow setting in the relevant functions to a level
5882
where they are not reported (John Bowler).
5883
Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like
5885
Worked around some C-style casts from (void*) because g++ 5.4.0 objects
5887
Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint
5888
overflow' check that is on by default with -Wall -Wextra.
5890
Version 1.6.31beta05 [July 13, 2017]
5891
Added eXIf chunk support.
5893
Version 1.6.31beta06 [July 17, 2017]
5894
Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm
5895
tags) to pngtest.png.
5897
Version 1.6.31beta07 [July 18, 2017]
5898
Revised the eXIf chunk in pngtest.png to fix "Bad IFD1 Directory" warning.
5900
Version 1.6.31rc01 [July 19, 2017]
5903
Version 1.6.31rc02 [July 25, 2017]
5904
Fixed typo in example.c (png_free_image should be png_image_free) (Bug
5905
report by John Smith)
5907
Version 1.6.31 [July 27, 2017]
5910
Version 1.6.32beta01 [July 31, 2017]
5911
Avoid possible NULL dereference in png_handle_eXIf when benign_errors
5912
are allowed. Avoid leaking the input buffer "eXIf_buf".
5913
Eliminated png_ptr->num_exif member from pngstruct.h and added num_exif
5914
to arguments for png_get_eXIf() and png_set_eXIf().
5915
Added calls to png_handle_eXIf(() in pngread.c and png_write_eXIf() in
5916
pngwrite.c, and made various other fixes to png_write_eXIf().
5917
Changed name of png_get_eXIF and png_set_eXIf() to png_get_eXIf_1() and
5918
png_set_eXIf_1(), respectively, to avoid breaking API compatibility
5921
Version 1.6.32beta02 [August 1, 2017]
5922
Updated contrib/libtests/pngunknown.c with eXIf chunk.
5924
Version 1.6.32beta03 [August 2, 2017]
5925
Initialized btoa[] in pngstest.c
5926
Stop memory leak when returning from png_handle_eXIf() with an error
5927
(Bug report from the OSS-fuzz project).
5929
Version 1.6.32beta04 [August 2, 2017]
5930
Replaced local eXIf_buf with info_ptr->eXIf_buf in png_handle_eXIf().
5931
Update libpng.3 and libpng-manual.txt about eXIf functions.
5933
Version 1.6.32beta05 [August 2, 2017]
5934
Restored png_get_eXIf() and png_set_eXIf() to maintain API compatibility.
5936
Version 1.6.32beta06 [August 2, 2017]
5937
Removed png_get_eXIf_1() and png_set_eXIf_1().
5939
Version 1.6.32beta07 [August 3, 2017]
5940
Check length of all chunks except IDAT against user limit to fix an
5941
OSS-fuzz issue (Fixes CVE-2017-12652).
5943
Version 1.6.32beta08 [August 3, 2017]
5944
Check length of IDAT against maximum possible IDAT size, accounting
5945
for height, rowbytes, interlacing and zlib/deflate overhead.
5946
Restored png_get_eXIf_1() and png_set_eXIf_1(), because strlen(eXIf_buf)
5947
does not work (the eXIf chunk data can contain zeroes).
5949
Version 1.6.32beta09 [August 3, 2017]
5950
Require cmake-2.8.8 in CMakeLists.txt. Revised symlink creation,
5951
no longer using deprecated cmake LOCATION feature (Clifford Yapp).
5952
Fixed five-byte error in the calculation of IDAT maximum possible size.
5954
Version 1.6.32beta10 [August 5, 2017]
5955
Moved chunk-length check into a png_check_chunk_length() private
5956
function (Suggested by Max Stepin).
5957
Moved bad pngs from tests to contrib/libtests/crashers
5958
Moved testing of bad pngs into a separate tests/pngtest-badpngs script
5959
Added the --xfail (expected FAIL) option to pngtest.c. It writes XFAIL
5960
in the output but PASS for the libpng test.
5961
Require cmake-3.0.2 in CMakeLists.txt (Clifford Yapp).
5962
Fix "const" declaration info_ptr argument to png_get_eXIf_1() and the
5963
num_exif argument to png_get_eXIf_1() (Github Issue 171).
5965
Version 1.6.32beta11 [August 7, 2017]
5966
Added "eXIf" to "chunks_to_ignore[]" in png_set_keep_unknown_chunks().
5967
Added huge_IDAT.png and empty_ancillary_chunks.png to testpngs/crashers.
5968
Make pngtest --strict, --relax, --xfail options imply -m (multiple).
5969
Removed unused chunk_name parameter from png_check_chunk_length().
5970
Relocated setting free_me for eXIf data, to stop an OSS-fuzz leak.
5971
Initialize profile_header[] in png_handle_iCCP() to fix OSS-fuzz issue.
5972
Initialize png_ptr->row_buf[0] to 255 in png_read_row() to fix OSS-fuzz UMR.
5973
Attempt to fix a UMR in png_set_text_2() to fix OSS-fuzz issue.
5974
Increase minimum zlib stream from 9 to 14 in png_handle_iCCP(), to account
5975
for the minimum 'deflate' stream, and relocate the test to a point
5976
after the keyword has been read.
5977
Check that the eXIf chunk has at least 2 bytes and begins with "II" or "MM".
5979
Version 1.6.32rc01 [August 18, 2017]
5980
Added a set of "huge_xxxx_chunk.png" files to contrib/testpngs/crashers,
5981
one for each known chunk type, with length = 2GB-1.
5982
Check for 0 return from png_get_rowbytes() and added some (size_t) typecasts
5983
in contrib/pngminus/*.c to stop some Coverity issues (162705, 162706,
5985
Renamed chunks in contrib/testpngs/crashers to avoid having files whose
5986
names differ only in case; this causes problems with some platforms
5987
(github issue #172).
5989
Version 1.6.32rc02 [August 22, 2017]
5990
Added contrib/oss-fuzz directory which contains files used by the oss-fuzz
5991
project (https://github.com/google/oss-fuzz/tree/master/projects/libpng).
5993
Version 1.6.32 [August 24, 2017]
5996
Version 1.6.33beta01 [August 28, 2017]
5997
Added PNGMINUS_UNUSED macro to contrib/pngminus/p*.c and added missing
5998
parenthesis in contrib/pngminus/pnm2png.c (bug report by Christian Hesse).
5999
Fixed off-by-one error in png_do_check_palette_indexes() (Bug report
6000
by Mick P., Source Forge Issue #269).
6002
Version 1.6.33beta02 [September 3, 2017]
6003
Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc
6004
to fix shortlived oss-fuzz issue 3234.
6005
Compute a larger limit on IDAT because some applications write a deflate
6006
buffer for each row (Bug report by Andrew Church).
6007
Use current date (DATE) instead of release-date (RDATE) in last
6008
changed date of contrib/oss-fuzz files.
6009
Enabled ARM support in CMakeLists.txt (Bernd Kuhls).
6011
Version 1.6.33beta03 [September 14, 2017]
6012
Fixed incorrect typecast of some arguments to png_malloc() and
6013
png_calloc() that were png_uint_32 instead of png_alloc_size_t
6014
(Bug report by "irwir" in Github libpng issue #175).
6015
Use pnglibconf.h.prebuilt when building for ANDROID with cmake (Github
6016
issue 162, by rcdailey).
6018
Version 1.6.33rc01 [September 20, 2017]
6019
Initialize memory allocated by png_inflate to zero, using memset, to
6020
stop an oss-fuzz "use of uninitialized value" detection in png_set_text_2()
6021
due to truncated iTXt or zTXt chunk.
6022
Initialize memory allocated by png_read_buffer to zero, using memset, to
6023
stop an oss-fuzz "use of uninitialized value" detection in
6024
png_icc_check_tag_table() due to truncated iCCP chunk.
6025
Removed a redundant test (suggested by "irwir" in Github issue #180).
6027
Version 1.6.33rc02 [September 23, 2017]
6028
Added an interlaced version of each file in contrib/pngsuite.
6029
Relocate new memset() call in pngrutil.c.
6030
Removed more redundant tests (suggested by "irwir" in Github issue #180).
6031
Add support for loading images with associated alpha in the Simplified
6032
API (Samuel Williams).
6034
Version 1.6.33 [September 28, 2017]
6035
Revert contrib/oss-fuzz/libpng_read_fuzzer.cc to libpng-1.6.32 state.
6036
Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc
6037
Add end_info structure and png_read_end() to the libpng fuzzer.
6039
Version 1.6.34 [September 29, 2017]
6040
Removed contrib/pngsuite/i*.png; some of them caused test failures.
6042
Version 1.6.35beta01 [March 6, 2018]
6043
Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
6044
failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
6045
Added calls to png_set_*() transforms commonly used by browsers to
6047
Removed some unnecessary brackets in pngrtran.c
6048
Fixed miscellaneous typos (Patch by github user "luzpaz").
6049
Change "ASM C" to "C ASM" in CMakeLists.txt
6050
Fixed incorrect handling of bKGD chunk in sub-8-bit files (Cosmin)
6051
Added hardware optimization directories to zip and 7z distributions.
6052
Fixed incorrect bitmask for options.
6053
Fixed many spelling typos.
6055
Version 1.6.35beta02 [March 28, 2018]
6056
Make png_get_iCCP consistent with man page (allow compression-type argument
6057
to be NULL, bug report by Lenard Szolnoki).
6059
Version 1.6.35 [July 15, 2018]
6060
Replaced the remaining uses of png_size_t with size_t (Cosmin)
6061
Fixed the calculation of row_factor in png_check_chunk_length
6062
(reported by Thuan Pham in SourceForge issue #278)
6063
Added missing parentheses to a macro definition
6064
(suggested by "irwir" in GitHub issue #216)
6066
Version 1.6.36 [December 1, 2018]
6067
Optimized png_do_expand_palette for ARM processors.
6068
Improved performance by around 10-22% on a recent ARM Chromebook.
6069
(Contributed by Richard Townsend, ARM Holdings)
6070
Fixed manipulation of machine-specific optimization options.
6071
(Contributed by Vicki Pfau)
6072
Used memcpy instead of manual pointer arithmetic on Intel SSE2.
6073
(Contributed by Samuel Williams)
6074
Fixed build errors with MSVC on ARM64.
6075
(Contributed by Zhijie Liang)
6076
Fixed detection of libm in CMakeLists.
6077
(Contributed by Cameron Cawley)
6078
Fixed incorrect creation of pkg-config file in CMakeLists.
6079
(Contributed by Kyle Bentley)
6080
Fixed the CMake build on Windows MSYS by avoiding symlinks.
6081
Fixed a build warning on OpenBSD.
6082
(Contributed by Theo Buehler)
6083
Fixed various typos in comments.
6084
(Contributed by "luz.paz")
6085
Raised the minimum required CMake version from 3.0.2 to 3.1.
6086
Removed yet more of the vestigial support for pre-ANSI C compilers.
6087
Removed ancient makefiles for ancient systems that have been broken
6088
across all previous libpng-1.6.x versions.
6089
Removed the Y2K compliance statement and the export control
6091
Applied various code style and documentation fixes.
6093
Version 1.6.37 [April 14, 2019]
6094
Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free.
6095
Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette.
6096
Fixed a memory leak in pngtest.c.
6097
Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in
6098
contrib/pngminus; refactor.
6099
Changed the license of contrib/pngminus to MIT; refresh makefile and docs.
6100
(Contributed by Willem van Schaik)
6101
Fixed a typo in the libpng license v2.
6102
(Contributed by Miguel Ojeda)
6103
Added makefiles for AddressSanitizer-enabled builds.
6104
Cleaned up various makefiles.
6106
Version 1.6.38 [September 14, 2022]
6107
Added configurations and scripts for continuous integration.
6108
Fixed various errors in the handling of tRNS, hIST and eXIf.
6109
Implemented many stability improvements across all platforms.
6110
Updated the internal documentation.
6112
Version 1.6.39 [November 20, 2022]
6113
Changed the error handler of oversized chunks (i.e. larger than
6114
PNG_USER_CHUNK_MALLOC_MAX) from png_chunk_error to png_benign_error.
6115
Fixed a buffer overflow error in contrib/tools/pngfix.
6116
Fixed a memory leak (CVE-2019-6129) in contrib/tools/pngcp.
6117
Disabled the ARM Neon optimizations by default in the CMake file,
6118
following the default behavior of the configure script.
6119
Allowed configure.ac to work with the trunk version of autoconf.
6120
Removed the support for "install" targets from the legacy makefiles;
6121
removed the obsolete makefile.cegcc.
6122
Cleaned up the code and updated the internal documentation.
6124
Version 1.6.40 [June 21, 2023]
6125
Fixed the eXIf chunk multiplicity checks.
6126
Fixed a memory leak in pCAL processing.
6127
Corrected the validity report about tRNS inside png_get_valid().
6128
Fixed various build issues on *BSD, Mac and Windows.
6129
Updated the configurations and the scripts for continuous integration.
6130
Cleaned up the code, the build scripts, and the documentation.
6132
Version 1.6.41 [January 24, 2024]
6133
Added SIMD-optimized code for the LoongArch LSX hardware.
6134
(Contributed by GuXiWei, JinBo and ZhangLixia)
6135
Fixed the run-time discovery of MIPS MSA hardware.
6136
(Contributed by Sui Jingfeng)
6137
Fixed an off-by-one error in the function png_do_check_palette_indexes(),
6138
which failed to recognize errors that might have existed in the first
6139
column of a broken palette-encoded image. This was a benign regression
6140
accidentally introduced in libpng-1.6.33. No pixel was harmed.
6141
(Contributed by Adam Richter; reviewed by John Bowler)
6142
Fixed, improved and modernized the contrib/pngminus programs, i.e.,
6143
png2pnm.c and pnm2png.c
6144
Removed old and peculiar portability hacks that were meant to silence
6145
warnings issued by gcc version 7.1 alone.
6146
(Contributed by John Bowler)
6147
Fixed and modernized the CMake file, and raised the minimum required
6148
CMake version from 3.1 to 3.6.
6149
(Contributed by Clinton Ingram, Timothy Lyanguzov, Tyler Kropp, et al.)
6150
Allowed the configure script to disable the building of auxiliary tools
6151
and tests, thus catching up with the CMake file.
6152
(Contributed by Carlo Bramini)
6153
Fixed a build issue on Mac.
6154
(Contributed by Zixu Wang)
6155
Moved the Autoconf macro files to scripts/autoconf.
6156
Moved the CMake files (except for the main CMakeLists.txt) to
6157
scripts/cmake and moved the list of their contributing authors to
6158
scripts/cmake/AUTHORS.md
6159
Updated the CI configurations and scripts.
6160
Relicensed the CI scripts to the MIT License.
6161
Improved the test coverage.
6162
(Contributed by John Bowler)
6164
Version 1.6.42 [January 29, 2024]
6165
Fixed the implementation of the macro function png_check_sig().
6166
This was an API regression, introduced in libpng-1.6.41.
6167
(Reported by Matthieu Darbois)
6168
Fixed and updated the libpng manual.
6170
Version 1.6.43 [February 23, 2024]
6171
Fixed the row width check in png_check_IHDR().
6172
This corrected a bug that was specific to the 16-bit platforms,
6173
and removed a spurious compiler warning from the 64-bit builds.
6174
(Reported by Jacek Caban; fixed by John Bowler)
6175
Added eXIf chunk support to the push-mode reader in pngpread.c.
6176
(Contributed by Chris Blume)
6177
Added contrib/pngexif for the benefit of the users who would like
6178
to inspect the content of eXIf chunks.
6179
Added contrib/conftest/basic.dfa, a basic build-time configuration.
6180
(Contributed by John Bowler)
6181
Fixed a preprocessor condition in pngread.c that broke build-time
6182
configurations like contrib/conftest/pngcp.dfa.
6183
(Contributed by John Bowler)
6184
Added CMake build support for LoongArch LSX.
6185
(Contributed by GuXiWei)
6186
Fixed a CMake build error that occurred under a peculiar state of the
6187
dependency tree. This was a regression introduced in libpng-1.6.41.
6188
(Contributed by Dan Rosser)
6189
Marked the installed libpng headers as system headers in CMake.
6190
(Contributed by Benjamin Buch)
6191
Updated the build support for RISCOS.
6192
(Contributed by Cameron Cawley)
6193
Updated the makefiles to allow cross-platform builds to initialize
6194
conventional make variables like AR and ARFLAGS.
6195
Added various improvements to the CI scripts in areas like version
6196
consistency verification and text linting.
6197
Added version consistency verification to pngtest.c also.
6199
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6200
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6201
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