1 CHANGES - changes for libpng
4 added reader into png.h
5 fixed small problems in stub file
8 split up pngwrite.c to several files
11 cleaned up writer, adding a few new tranformations
12 fixed some bugs in writer
13 interfaced with zlib 0.5
15 added check for 64 KB blocks for 16 bit machines
17 cleaned up code and commented code
18 simplified time handling into png_time
19 created png_color_16 and png_color_8 to handle color needs
20 cleaned up color type defines
22 made various names more consistant
23 interfaced with zlib 0.71
24 cleaned up zTXt reader and writer (using zlib's Reset functions)
25 split transformations into pngrtran.c and pngwtran.c
27 interfaced with zlib 0.8
28 fixed many reading and writing bugs
29 saved using 3 spaces instead of tabs
31 added png_large_malloc() and png_large_free()
33 cleaned up some compiler warnings
34 added png_start_read_image()
36 cleaned up lots of bugs
37 finished dithering and other stuff
39 changed name from pnglib to libpng
40 version 0.71 [June, 1995]
41 changed pngtest.png for zlib 0.93
42 fixed error in libpng.txt and example.c
45 added png_set_filler()
46 split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
47 added #define's to remove unwanted code
48 moved png_info_init() to png.c
49 added old_size into png_realloc()
50 added functions to manually set filtering and compression info
51 changed compression parameters based on image type
52 optimized filter selection code
54 changed external functions passing floats to doubles (k&r problems?)
55 put all the configurable stuff in pngconf.h
56 enabled png_set_shift to work with paletted images on read
57 added png_read_update_info() - updates info structure with
59 version 0.81 [August, 1995]
60 incorporated Tim Wegner's medium model code (thanks, Tim)
61 version 0.82 [September, 1995]
63 version 0.85 [December, 1995]
64 added more medium model code (almost everything's a far)
65 added i/o, error, and memory callback functions
66 fixed some bugs (16 bit, 4 bit interlaced, etc.)
67 added first run progressive reader (barely tested)
68 version 0.86 [January, 1996]
70 improved documentation
71 version 0.87 [January, 1996]
72 fixed medium model bugs
73 fixed other bugs introduced in 0.85 and 0.86
74 added some minor documentation
75 version 0.88 [January, 1996]
76 fixed progressive bugs
77 replaced tabs with spaces
78 cleaned up documentation
79 added callbacks for read/write and warning/error functions
80 version 0.89 [July, 1996]
81 added new initialization API to make libpng work better with shared libs
82 we now have png_create_read_struct(), png_create_write_struct(),
83 png_create_info_struct(), png_destroy_read_struct(), and
84 png_destroy_write_struct() instead of the separate calls to
85 malloc and png_read_init(), png_info_init(), and png_write_init()
86 changed warning/error callback functions to fix bug - this means you
87 should use the new initialization API if you were using the old
88 png_set_message_fn() calls, and that the old API no longer exists
89 so that people are aware that they need to change their code
90 changed filter selection API to allow selection of multiple filters
91 since it didn't work in previous versions of libpng anyways
92 optimized filter selection code
93 fixed png_set_background() to allow using an arbitrary RGB color for
95 fixed gamma and background correction for paletted images, so
96 png_correct_palette is not needed unless you are correcting an
97 external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
98 in pngconf.h) - if nobody uses this, it may disappear in the future.
99 fixed bug with Borland 64K memory allocation (Alexander Lehmann)
100 fixed bug in interlace handling (Smarasderagd, I think)
101 added more error checking for writing and image to reduce invalid files
102 separated read and write functions so that they won't both be linked
103 into a binary when only reading or writing functionality is used
104 new pngtest image also has interlacing and zTXt
105 updated documentation to reflect new API
106 version 0.90 [January, 1997]
107 made CRC errors/warnings on critical and ancillary chunks configurable
108 libpng will use the zlib CRC routines by (compile-time) default
109 changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
110 added external C++ wrapper statements to png.h (Gilles Dauphin)
111 allow PNG file to be read when some or all of file signature has already
112 been read from the beginning of the stream. ****This affects the size
113 of info_struct and invalidates all programs that use a shared libpng****
114 fixed png_filler() declarations
115 fixed? background color conversions
116 fixed order of error function pointers to match documentation
117 current chunk name is now available in png_struct to reduce the number
118 of nearly identical error messages (will simplify multi-lingual
119 support when available)
120 try to get ready for unknown-chunk callback functions:
121 - previously read critical chunks are flagged, so the chunk handling
122 routines can determine if the chunk is in the right place
123 - all chunk handling routines have the same prototypes, so we will
124 be able to handle all chunks via a callback mechanism
125 try to fix Linux "setjmp" buffer size problems
126 removed png_large_malloc, png_large_free, and png_realloc functions.
127 version 0.95 [March, 1997]
128 fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
129 fixed bug in PNG file signature compares when start != 0
130 changed parameter type of png_set_filler(...filler...) from png_byte
132 added test for MACOS to ensure that both math.h and fp.h are not #included
133 added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
134 added "packswap" transformation, which changes the endianness of
135 packed-pixel bytes (Kevin Bracey)
136 added "strip_alpha" transformation, which removes the alpha channel of
137 input images without using it (not neccesarily a good idea)
138 added "swap_alpha" transformation, which puts the alpha channel in front
139 of the color bytes instead of after
140 removed all implicit variable tests which assume NULL == 0 (I think)
141 changed several variables to "png_size_t" to show 16/32-bit limitations
142 added new pCAL chunk read/write support
143 added experimental filter selection weighting (Greg Roelofs)
144 removed old png_set_rgbx() and png_set_xrgb() functions that have been
145 obsolete for about 2 years now (use png_set_filler() instead)
146 added macros to read 16- and 32-bit ints directly from buffer, to be
147 used only on those systems that support it (namely PowerPC and 680x0)
148 With some testing, this may become the default for MACOS/PPC systems.
149 only calculate CRC on data if we are going to use it
150 added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
151 added macros for simple libpng debugging output selectable at compile time
152 removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
153 more description of info_struct in libpng.txt and png.h
154 more instructions in example.c
155 more chunk types tested in pngtest.c
156 renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
157 png_set_<chunk>. We now have corresponding png_get_<chunk>
158 functions in pngget.c to get infomation in info_ptr. This isolates
159 the application from the internal organization of png_info_struct
160 (good for shared library implementations).
161 version 0.96 [May, 1997]
162 fixed serious bug with < 8bpp images introduced in 0.95
163 fixed 256-color transparency bug (Greg Roelofs)
164 fixed up documentation (Greg Roelofs, Laszlo Nyul)
165 fixed "error" in pngconf.h for Linux setjmp() behaviour
166 fixed DOS medium model support (Tim Wegner)
167 fixed png_check_keyword() for case with error in static string text
168 added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
169 added typecasts to quiet compiler errors
170 added more debugging info
171 version 0.97 [January, 1998]
172 removed PNG_USE_OWN_CRC capability
173 relocated png_set_crc_action from pngrutil.c to pngrtran.c
174 fixed typecasts of "new_key", etc. (Andreas Dilger)
175 added RFC 1152 [sic] date support
176 fixed bug in gamma handling of 4-bit grayscale
177 added 2-bit grayscale gamma handling (Glenn R-P)
178 added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
179 minor corrections in libpng.txt
180 added simple sRGB support (Glenn R-P)
181 easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
182 all configurable options can be selected from command-line instead
183 of having to edit pngconf.h (Glenn R-P)
184 fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
185 added more conditions for png_do_background, to avoid changing
186 black pixels to background when a background is supplied and
187 no pixels are transparent
188 repaired PNG_NO_STDIO behaviour
189 tested NODIV support and made it default behaviour (Greg Roelofs)
190 added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
191 regularized version numbering scheme and bumped shared-library major
192 version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs)
193 version 0.98 [January, 1998]
194 cleaned up some typos in libpng.txt and in code documentation
195 fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
196 cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
197 changed recommendation about file_gamma for PC images to .51 from .45,
198 in example.c and libpng.txt, added comments to distinguish between
199 screen_gamma, viewing_gamma, and display_gamma.
200 changed all references to RFC1152 to read RFC1123 and changed the
201 PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
202 added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
203 changed srgb_intent from png_byte to int to avoid compiler bugs
204 version 0.99 [January 30, 1998]
205 free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
206 fixed a longstanding "packswap" bug in pngtrans.c
207 fixed some inconsistencies in pngconf.h that prevented compiling with
208 PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
209 fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
210 changed recommendation about file_gamma for PC images to .50 from .51 in
211 example.c and libpng.txt, and changed file_gamma for sRGB images to .45
212 added a number of functions to access information from the png structure
213 png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
214 added TARGET_MACOS similar to zlib-1.0.8
215 define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
216 added type casting to all png_malloc() function calls
217 version 0.99a [January 31, 1998]
218 Added type casts and parentheses to all returns that return a value.(Tim W.)
219 version 0.99b [February 4, 1998]
220 Added type cast png_uint_32 on malloc function calls where needed.
221 Changed type of num_hist from png_uint_32 to int (same as num_palette).
222 Added checks for rowbytes overflow, in case png_size_t is less than 32 bits.
223 Renamed makefile.elf to makefile.lnx.
224 version 0.99c [February 7, 1998]
225 More type casting. Removed erroneous overflow test in pngmem.c.
226 Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.
227 Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5.
228 version 0.99d [February 11, 1998]
229 Renamed "far_to_near()" "png_far_to_near()"
231 Version 99c "buffered" operations didn't work as intended. Replaced them
232 with png_memcpy_check() and png_memset_check().
233 Added many "if (png_ptr == NULL) return" to quell compiler warnings about
234 unused png_ptr, mostly in pngget.c and pngset.c.
235 Check for overlength tRNS chunk present when indexed-color PLTE is read.
236 Cleaned up spelling errors in libpng.3/libpng.txt
237 Corrected a problem with png_get_tRNS() which returned undefined trans array
238 version 0.99e [February 28, 1998]
239 Corrected png_get_tRNS() again.
240 Add parentheses for easier reading of pngget.c, fixed "||" should be "&&".
241 Touched up example.c to make more of it compileable, although the entire
242 file still can't be compiled (Willem van Schaik)
243 Fixed a bug in png_do_shift() (Bryan Tsai)
244 Added a space in png.h prototype for png_write_chunk_start()
245 Replaced pngtest.png with one created with zlib 1.1.1
246 Changed pngtest to report PASS even when file size is different (Jean-loup G.)
247 Corrected some logic errors in png_do_invert_alpha() (Chris Patterson)
248 version 0.99f [March 5, 1998]
249 Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey)
250 Moved makefiles into a "scripts" directory, and added INSTALL instruction file
251 Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok)
252 Added pointers to "note on libpng versions" in makefile.lnx and README
253 Added row callback feature when reading and writing nonprogressive rows
254 and added a test of this feature in pngtest.c
255 Added user transform callbacks, with test of the feature in pngtest.c
256 version 0.99g [March 6, 1998, morning]
257 Minor changes to pngtest.c to suppress compiler warnings.
258 Removed "beta" language from documentation.
259 version 0.99h [March 6, 1998, evening]
260 Minor changes to previous minor changes to pngtest.c
261 Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED
262 and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro
263 Added user transform capability
264 version 1.00 [March 7, 1998]
265 Changed several typedefs in pngrutil.c
266 Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)
267 replaced "while(1)" with "for(;;)"
268 added PNGARG() to prototypes in pngtest.c and removed some prototypes
269 updated some of the makefiles (Tom Lane)
270 changed some typedefs (s_start, etc.) in pngrutil.c
271 fixed dimensions of "short_months" array in pngwrite.c
272 Replaced ansi2knr.c with the one from jpeg-v6
273 version 1.0.0 [March 8, 1998]
274 Changed name from 1.00 to 1.0.0 (Adam Costello)
275 Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)
276 version 1.0.0a [March 9, 1998]
277 Fixed three bugs in pngrtran.c to make gamma+background handling consistent
279 Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz
280 for major, minor, and bugfix releases. This is 10001. (Adam Costello,
282 Make months range from 1-12 in png_convert_to_rfc1123
283 version 1.0.0b [March 13, 1998]
284 Quieted compiler complaints about two empty "for" loops in pngrutil.c
285 Minor changes to makefile.s2x
286 Removed #ifdef/#endif around a png_free() in pngread.c
287 version 1.0.1 [March 14, 1998]
288 Changed makefile.s2x to reduce security risk of using a relative pathname
289 Fixed some typos in the documentation (Greg).
290 Fixed a problem with value of "channels" returned by png_read_update_info()
291 version 1.0.1a [April 21, 1998]
292 Optimized Paeth calculations by replacing abs() function calls with intrinsics
293 plus other loop optimizations. Improves avg decoding speed by about 20%.
294 Commented out i386istic "align" compiler flags in makefile.lnx.
295 Reduced the default warning level in some makefiles, to make them consistent.
296 Removed references to IJG and JPEG in the ansi2knr.c copyright statement.
297 Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.
298 Added grayscale and 16-bit capability to png_do_read_filler().
299 Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes
300 too large when writing an image with bit_depth < 8 (Bob Dellaca).
301 Corrected some bugs in the experimental weighted filtering heuristics.
302 Moved a misplaced pngrutil code block that truncates tRNS if it has more
303 than num_palette entries -- test was done before num_palette was defined.
304 Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
305 Changed compiler flags in makefile.wat for better optimization (Pawel Mrochen).
306 version 1.0.1b [May 2, 1998]
307 Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
308 Relocated the png_composite macros from pngrtran.c to png.h (Greg).
309 Added makefile.sco (contributed by Mike Hopkirk).
310 Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
311 Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
312 More work on the Paeth-filtering, achieving imperceptible speedup (A Kleinert).
313 More work on loop optimization which may help when compiled with C++ compilers.
314 Added warnings when people try to use transforms they've defined out.
315 Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
316 Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
317 version 1.0.1c [May 11, 1998]
318 Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
319 filler bytes should have been 0xff instead of 0xf.
320 Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
321 Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
322 out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
323 Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,
324 for consistency, in pngconf.h
325 Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier
326 to remove unwanted capabilities via the compile line
327 Made some corrections to grammar (which, it's) in documentation (Greg).
328 Corrected example.c, use of row_pointers in png_write_image().
329 version 1.0.1d [May 24, 1998]
330 Corrected several statements that used side effects illegally in pngrutil.c
331 and pngtrans.c, that were introduced in version 1.0.1b
332 Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
333 More corrections to example.c, use of row_pointers in png_write_image()
335 Added pngdll.mak and pngdef.pas to scripts directory, contributed by
336 Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
337 Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
338 Changed several loops from count-down to count-up, for consistency.
339 version 1.0.1e [June 6, 1998]
340 Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
341 added warnings when people try to set png_read_fn and png_write_fn in
343 Added a test such that png_do_gamma will be done when num_trans==0
344 for truecolor images that have defined a background. This corrects an
345 error that was introduced in libpng-0.90 that can cause gamma processing
347 Added tests in png.h to include "trans" and "trans_values" in structures
348 when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined.
349 Add png_free(png_ptr->time_buffer) in png_destroy_read_struct()
350 Moved png_convert_to_rfc_1123() from pngwrite.c to png.c
351 Added capability for user-provided malloc_fn() and free_fn() functions,
352 and revised pngtest.c to demonstrate their use, replacing the
353 PNGTEST_DEBUG_MEM feature.
354 Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
355 version 1.0.2 [June 14, 1998]
356 Fixed two bugs in makefile.bor .
357 version 1.0.2a [December 30, 1998]
358 Replaced and extended code that was removed from png_set_filler() in 1.0.1a.
359 Fixed a bug in png_do_filler() that made it fail to write filler bytes in
360 the left-most pixel of each row (Kevin Bracey).
361 Changed "static pngcharp tIME_string" to "static char tIME_string[30]"
362 in pngtest.c (Duncan Simpson).
363 Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk
364 even when no tIME chunk was present in the source file.
365 Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit.
366 Fixed a problem in png_read_push_finish_row(), which would not skip some
367 passes that it should skip, for images that are less than 3 pixels high.
368 Interchanged the order of calls to png_do_swap() and png_do_shift()
369 in pngwtran.c (John Cromer).
370 Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h .
371 Changed "bad adaptive filter type" from error to warning in pngrutil.c .
372 Fixed a documentation error about default filtering with 8-bit indexed-color.
373 Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO
375 Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.
376 Added png_get_copyright() and png_get_header_version() functions.
377 Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c
378 Added information about debugging in libpng.txt and libpng.3 .
379 Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and makefile.sco.
380 Removed lines after Dynamic Dependencies" in makefile.aco .
381 Revised makefile.dec to make a shared library (Jeremie Petit).
382 Removed trailing blanks from all files.
383 version 1.0.2a [January 6, 1999]
384 Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h
385 Added "if" tests to silence complaints about unused png_ptr in png.h and png.c
386 Changed "check_if_png" function in example.c to return true (nonzero) if PNG.
387 Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()
389 version 1.0.3 [January 14, 1999]
390 Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)
391 Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.
392 version 1.0.3a [August 12, 1999]
393 Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
394 if an attempt is made to read an interlaced image when it's not supported.
395 Added check if png_ptr->trans is defined before freeing it in pngread.c
396 Modified the Y2K statement to include versions back to version 0.71
397 Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c
398 Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)
399 Replaced leading blanks with tab characters in makefile.hux
400 Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.
401 Changed (float)red and (float)green to (double)red, (double)green
402 in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.
403 Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).
404 Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).
405 Updated documentation to refer to the PNG-1.2 specification.
406 Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c
407 in makefile.knr, INSTALL, and README (L. Peter Deutsch)
408 Fixed bugs in calculation of the length of rowbytes when adding alpha
409 channels to 16-bit images, in pngrtran.c (Chris Nokleberg)
410 Added function png_set_user_transform_info() to store user_transform_ptr,
411 user_depth, and user_channels into the png_struct, and a function
412 png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)
413 Added function png_set_empty_plte_permitted() to make libpng useable
415 Corrected the typedef for png_free_ptr in png.h (Jesse Jones).
416 Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
417 consistent with PNG-1.2, and allow variance of 500 before complaining.
418 Added assembler code contributed by Intel in file pngvcrd.c and modified
419 makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, Gilles Vollant)
420 Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
421 Added some aliases for png_set_expand() in pngrtran.c, namely
422 png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
423 (Greg Roelofs, in "PNG: The Definitive Guide").
424 Added makefile.beo for BEOS on X86, contributed by Sander Stok.
425 version 1.0.3b [August 26, 1999]
426 Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
427 Changed leading blanks to tabs in all makefiles.
428 Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
429 Made alternate versions of png_set_expand() in pngrtran.c, namely
430 png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
431 (Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases.
432 Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
433 Revised calculation of num_blocks in pngmem.c to avoid a potentially
434 negative shift distance, whose results are undefined in the C language.
435 Added a check in pngset.c to prevent writing multiple tIME chunks.
436 Added a check in pngwrite.c to detect invalid small window_bits sizes.
437 version 1.0.3d [September 4, 1999]
438 Fixed type casting of igamma in pngrutil.c
439 Added new png_expand functions to scripts/pngdef.pas and pngos2.def
440 Added a demo read_user_transform_fn that examines the row filters in pngtest.c
441 version 1.0.4 [September 24, 1999]
442 Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
443 Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
444 Made several minor corrections to pngtest.c
445 Renamed the makefiles with longer but more user friendly extensions.
446 Copied the PNG copyright and license to a separate LICENSE file.
447 Revised documentation, png.h, and example.c to remove reference to
448 "viewing_gamma" which no longer appears in the PNG specification.
449 Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
450 Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
451 Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
452 assembler code) and makefile.vcwin32 (doesn't).
453 Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
454 Added a copy of pngnow.png to the distribution.
455 version 1.0.4a [September 25, 1999]
456 Increase max_pixel_depth in pngrutil.c if a user transform needs it.
457 Changed several division operations to right-shifts in pngvcrd.c
458 version 1.0.4b [September 30, 1999]
459 Added parentheses in line 3732 of pngvcrd.c
460 Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
461 version 1.0.4c [October 1, 1999]
462 Added a "png_check_version" function in png.c and pngtest.c that will generate
463 a helpful compiler error if an old png.h is found in the search path.
464 Changed type of png_user_transform_depth|channels from int to png_byte.
465 version 1.0.4d [October 6, 1999]
466 Changed 0.45 to 0.45455 in png_set_sRGB()
467 Removed unused PLTE entries from pngnow.png
468 Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.
469 version 1.0.4e [October 10, 1999]
470 Fixed sign error in pngvcrd.c (Greg Roelofs)
471 Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)
472 version 1.0.4f [October 15, 1999]
473 Surrounded example.c code with #if 0 .. #endif to prevent people from
474 inadvertently trying to compile it.
475 Changed png_get_header_version() from a function to a macro in png.h
476 Added type casting mostly in pngrtran.c and pngwtran.c
477 Removed some pointless "ptr = NULL" in pngmem.c
478 Added a "contrib" directory containing the source code from Greg's book.
479 version 1.0.5 [October 15, 1999]
480 Minor editing of the INSTALL and README files.
481 version 1.0.5a [October 23, 1999]
482 Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
483 Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
484 Further optimization and bugfix of pngvcrd.c
485 Revised pngset.c so that it does not allocate or free memory in the user's
486 text_ptr structure. Instead, it makes its own copy.
487 Created separate write_end_info_struct in pngtest.c for a more severe test.
488 Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
489 version 1.0.5b [November 23, 1999]
490 Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and
491 PNG_FLAG_WROTE_tIME from flags to mode.
492 Added png_write_info_before_PLTE() function.
493 Fixed some typecasting in contrib/gregbook/*.c
494 Updated scripts/makevms.com and added makevms.com to contrib/gregbook
495 and contrib/pngminus (Martin Zinser)
496 version 1.0.5c [November 26, 1999]
497 Moved png_get_header_version from png.h to png.c, to accomodate ansi2knr.
498 Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
499 accomodate making DLL's: Moved usr_png_ver from global variable to function
500 png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and
501 eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays
502 into pngtypes.h. Eliminated use of global png_pass arrays. Declared the
503 png_CHNK and png_pass arrays to be "const". Made the global arrays
504 available to applications (although none are used in libpng itself) when
505 PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined.
506 Removed some extraneous "-I" from contrib/pngminus/makefile.std
507 Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.
508 Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3
509 version 1.0.5d [November 29, 1999]
510 Add type cast (png_const_charp) two places in png.c
511 Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
512 Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
513 to applications a macro "PNG_USE_LOCAL_ARRAYS".
514 #ifdef out all the new declarations when PNG_USE_GLOBAL_ARRAYS is defined.
515 Added PNG_EXPORT_VAR macro to accommodate making DLL's.
516 version 1.0.5e [November 30, 1999]
517 Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
518 structure; refactored the inflate/deflate support to make adding new chunks
519 with trailing compressed parts easier in the future, and added new functions
520 png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP,
521 png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond).
522 NOTE: Applications that write text chunks MUST define png_text->lang
523 before calling png_set_text(). It must be set to NULL if you want to
524 write tEXt or zTXt chunks. If you want your application to be able to
525 run with older versions of libpng, use
527 #ifdef PNG_iTXt_SUPPORTED
528 png_text[i].lang = NULL;
531 Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned
532 offsets (Eric S. Raymond).
533 Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into
534 PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED
535 macros, leaving the separate macros also available.
536 Removed comments on #endifs at the end of many short, non-nested #if-blocks.
537 version 1.0.5f [December 6, 1999]
538 Changed makefile.solaris to issue a warning about potential problems when
539 the ucb "ld" is in the path ahead of the ccs "ld".
540 Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.
541 Added sCAL chunk support (Eric S. Raymond).
542 version 1.0.5g [December 7, 1999]
543 Fixed "png_free_spallettes" typo in png.h
544 Added code to handle new chunks in pngpread.c
545 Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block
546 Added "translated_key" to png_text structure and png_write_iTXt().
547 Added code in pngwrite.c to work around a newly discovered zlib bug.
548 version 1.0.5h [December 10, 1999]
549 NOTE: regarding the note for version 1.0.5e, the following must also
550 be included in your code:
551 png_text[i].translated_key = NULL;
552 Unknown chunk handling is now supported.
553 Option to eliminate all floating point support was added. Some new
554 fixed-point functions such as png_set_gAMA_fixed() were added.
555 Expanded tabs and removed trailing blanks in source files.
556 version 1.0.5i [December 13, 1999]
557 Added some type casts to silence compiler warnings.
558 Renamed "png_free_spalette" to "png_free_spalettes" for consistency.
559 Removed leading blanks from a #define in pngvcrd.c
560 Added some parameters to the new png_set_keep_unknown_chunks() function.
561 Added a test for up->location != 0 in the first instance of writing
562 unknown chunks in pngwrite.c
563 Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to
565 Added png_free_hIST() function.
566 Various patches to fix bugs in the sCAL and integer cHRM processing,
567 and to add some convenience macros for use with sCAL.
568 version 1.0.5j [December 21, 1999]
569 Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
570 around buggy compilers.
571 Added new type "png_fixed_point" for integers that hold float*100000 values
572 Restored backward compatibility of tEXt/zTXt chunk processing:
573 Restored the first four members of png_text to the same order as v.1.0.5d.
574 Added members "lang_key" and "itxt_length" to png_text struct. Set
575 text_length=0 when "text" contains iTXt data. Use the "compression"
576 member to distinguish among tEXt/zTXt/iTXt types. Added
577 PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.
578 The "Note" above, about backward incompatibility of libpng-1.0.5e, no
580 Fixed png_read|write_iTXt() to read|write parameters in the right order,
581 and to write the iTXt chunk after IDAT if it appears in the end_ptr.
582 Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
583 Reversed the order of trying to write floating-point and fixed-point gAMA.
584 version 1.0.5k [December 27, 1999]
585 Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
586 Added png_handle_as_unknown() function (Glenn)
587 Added png_free_chunk_list() function and chunk_list and num_chunk_list members
589 Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.
590 Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings
591 about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)
592 Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
593 Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
594 Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
595 version 1.0.5l [January 1, 2000]
596 Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
597 for setting a callback function to handle unknown chunks and for
598 retrieving the associated user pointer (Glenn).
599 version 1.0.5m [January 7, 2000]
600 Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
601 version 1.0.5n [January 9, 2000]
602 Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
603 own memory for info_ptr->palette. This makes it safe for the calling
604 application to free its copy of the palette any time after it calls
606 version 1.0.5o [January 20, 2000]
607 Cosmetic changes only (removed some trailing blanks and TABs)
608 version 1.0.5p [January 31, 2000]
609 Renamed pngdll.mak to makefile.bd32
610 Cosmetic changes in pngtest.c
611 version 1.0.5q [February 5, 2000]
612 Relocated the makefile.solaris warning about PATH problems.
613 Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
614 Revised makefile.gcmmx
615 Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
616 version 1.0.5r [February 7, 2000]
617 Removed superfluous prototype for png_get_itxt from png.h
618 Fixed a bug in pngrtran.c that improperly expanded the background color.
619 Return *num_text=0 from png_get_text() when appropriate, and fix documentation
620 of png_get_text() in libpng.txt/libpng.3.
621 version 1.0.5s [February 18, 2000]
622 Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
623 new error handler that's planned for the next libpng release, and changed
624 example.c, pngtest.c, and contrib programs to use this macro.
625 Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
626 Fixed a bug in png_read_png() that caused it to fail to expand some images
627 that it should have expanded.
628 Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
630 Changed the allocation of palette, history, and trans arrays back to
631 the version 1.0.5 method (linking instead of copying) which restores
632 backward compatibility with version 1.0.5. Added some remarks about
633 that in example.c. Added "free_me" member to info_ptr and png_ptr
634 and added png_free_data() function.
635 Updated makefile.linux and makefile.gccmmx to make directories conditionally.
636 Made cosmetic changes to pngasmrd.h
637 Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
638 Modified png_read_png() to allocate info_ptr->row_pointers only if it
639 hasn't already been allocated.
640 version 1.0.5t [March 4, 2000]
641 Changed png_jmp_env() migration aiding macro to png_jmpbuf().
642 Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c
643 Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when
644 PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b
645 Files in contrib/gregbook were revised to use png_jmpbuf() and to select
646 a 24-bit visual if one is available, and to allow abbreviated options.
647 Files in contrib/pngminus were revised to use the png_jmpbuf() macro.
648 Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s
649 version 1.0.5u [March 5, 2000]
650 Simplified the code that detects old png.h in png.c and pngtest.c
651 Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)
652 Increased precision of rgb_to_gray calculations from 8 to 15 bits and
653 added png_set_rgb_to_gray_fixed() function.
654 Added makefile.bc32 (32-bit Borland C++, C mode)
655 version 1.0.5v [March 11, 2000]
656 Added some parentheses to the png_jmpbuf macro definition.
657 Updated references to the zlib home page, which has moved to freesoftware.com.
658 Corrected bugs in documentation regarding png_read_row() and png_write_row().
659 Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt.
660 Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
661 revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
662 version 1.0.6 [March 20, 2000]
663 Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c
664 Added makefile.sggcc (SGI IRIX with gcc)
665 version 1.0.6d [April 7, 2000]
666 Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
667 Added data_length parameter to png_decompress_chunk() function
668 Revised documentation to remove reference to abandoned png_free_chnk functions
669 Fixed an error in png_rgb_to_gray_fixed()
670 Revised example.c, usage of png_destroy_write_struct().
671 Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
672 Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c
673 Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
674 version 1.0.6e [April 9, 2000]
675 Added png_data_freer() function.
676 In the code that checks for over-length tRNS chunks, added check of
677 info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
678 Minor revisions of libpng.txt/libpng.3.
679 Check for existing data and free it if the free_me flag is set, in png_set_*()
681 Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED
683 Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c
684 and mentioned the purposes of the two macros in libpng.txt/libpng.3.
685 version 1.0.6f [April 14, 2000]
686 Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.
687 Add checks in png_set_text() for NULL members of the input text structure.
688 Revised libpng.txt/libpng.3.
689 Removed superfluous prototype for png_set_itxt from png.h
690 Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
691 Changed several png_errors about malformed ancillary chunks to png_warnings.
692 version 1.0.6g [April 24, 2000]
693 Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
694 Relocated paragraph about png_set_background() in libpng.3/libpng.txt
695 and other revisions (Matthias Benckmann)
696 Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
697 png_ptr members to restore binary compatibility with libpng-1.0.5
698 (breaks compatibility with libpng-1.0.6).
699 version 1.0.6h [April 24, 2000]
700 Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds
701 libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)
702 This is a temporary change for test purposes.
703 version 1.0.6i [May 2, 2000]
704 Rearranged some members at the end of png_info and png_struct, to put
705 unknown_chunks_num and free_me within the original size of the png_structs
706 and free_me, png_read_user_fn, and png_free_fn within the original png_info,
707 because some old applications allocate the structs directly instead of
708 using png_create_*().
709 Added documentation of user memory functions in libpng.txt/libpng.3
710 Modified png_read_png so that it will use user_allocated row_pointers
711 if present, unless free_me directs that it be freed, and added description
712 of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.
713 Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version
714 1.00) members of png_struct and png_info, to regain binary compatibility
715 when you define this macro. Capabilities lost in this event
716 are user transforms (new in version 1.0.0),the user transform pointer
717 (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,
718 the high-level interface, and unknown chunks support (all new in 1.0.6).
719 This was necessary because of old applications that allocate the structs
720 directly as authors were instructed to do in libpng-0.88 and earlier,
721 instead of using png_create_*().
722 Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which
723 can be used to detect codes that directly allocate the structs, and
724 code to check these modes in png_read_init() and png_write_init() and
725 generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED
727 Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
728 version 1.0.6j [May 3, 2000]
729 Overloaded png_read_init() and png_write_init() with macros that convert
730 calls to png_read_init_2() or png_write_init_2() that check the version
732 version 1.0.7beta11 [May 7, 2000]
733 Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
734 which are no longer used.
735 Eliminated the three new members of png_text when PNG_NO_iTXt_SUPPORTED
736 or PNG_LEGACY_SUPPORTED is defined.
737 Made PNG_NO_ITXT_SUPPORTED the default setting, to avoid memory overrun
738 when old applications fill the info_ptr->text structure directly.
739 Added PNGAPI macro, and added it to the definitions of all exported functions.
740 Relocated version macro definitions ahead of the includes of zlib.h and
742 version 1.0.7beta12 [May 12, 2000]
743 Revised pngset.c to avoid a problem with expanding the png_debug macro.
744 Deleted some extraneous defines from pngconf.h
745 Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
746 Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
747 Added png_access_version_number() function.
748 Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
749 Expanded libpng.3/libpng.txt information about png_data_freer().
750 version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
751 Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
752 warnings instead of errors, as pngrutil.c does.
753 Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
754 will actually write IDATs.
755 Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
756 Make png_free_data() ignore its final parameter except when freeing data
757 that can have multiple instances (text, sPLT, unknowns).
758 Fixed a new bug in png_set_rows().
759 Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
760 Added png_set_invalid() function.
761 Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
762 version 1.0.7beta15 [May 30, 2000]
763 Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
764 fewer error messages.
765 Rearranged checks for Z_OK to check the most likely path first in pngpread.c
767 Added checks in pngtest.c for png_create_*() returning NULL, and mentioned
768 in libpng.txt/libpng.3 the need for applications to check this.
769 Changed names of png_default_*() functions in pngtest to pngtest_*().
770 Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32.
771 Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c
772 Set each pointer to NULL after freeing it in png_free_data().
773 Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
774 macro that conflicts with libpng's png_color_16.index. (Dimitri Papadapoulos)
775 Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).
776 version 1.0.7beta16 [June 4, 2000]
777 Revised the workaround of AIX string.h "index" bug.
778 Added a check for overlength PLTE chunk in pngrutil.c.
779 Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
780 indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
781 Added a warning in png_decompress_chunk() when it runs out of data, e.g.
782 when it tries to read an erroneous PhotoShop iCCP chunk.
783 Added PNG_USE_DLL macro.
784 Revised the copyright/disclaimer/license notice.
785 Added contrib/msvctest directory
786 version 1.0.7rc1 [June 9, 2000]
787 Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
788 Added contrib/visupng directory (Willem van Schaik)
789 version 1.0.7beta18 [June 23, 2000]
790 Revised PNGAPI definition, and pngvcrd.c to work with __GCC__
791 and do not redefine PNGAPI if it is passed in via a compiler directive.
792 Revised visupng/PngFile.c to remove returns from within the Try block.
793 Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
794 Updated contrib/visupng/cexcept.h to version 1.0.0.
795 Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
796 version 1.0.7rc2 [June 28, 2000]
797 Updated license to include disclaimers required by UCITA.
798 Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.
799 version 1.0.7 [July 1, 2000]
800 Revised the definition of "trans_values" in libpng.3/libpng.txt
801 version 1.0.8beta1 [July 8, 2000]
802 Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.
803 Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and
805 Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h.
806 Removed unused "#include <assert.h>" from png.c
807 Added WindowsCE support.
808 Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment.
809 version 1.0.8beta2 [July 10, 2000]
810 Added project files to the wince directory and made further revisions
811 of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE.
812 version 1.0.8beta3 [July 11, 2000]
813 Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS()
814 for indexed-color input files to avoid potential double-freeing trans array
815 under some unusual conditions; problem was introduced in version 1.0.6f.
816 Further revisions to pngtest.c and files in the wince subdirectory.
817 version 1.0.8beta4 [July 14, 2000]
818 Added the files pngbar.png and pngbar.jpg to the distribution.
819 Added makefile.cygwin, and cygwin support in pngconf.h
820 Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory)
821 version 1.0.8rc1 [July 16, 2000]
822 Revised png_debug() macros and statements to eliminate compiler warnings.
823 version 1.0.8 [July 24, 2000]
824 Added png_flush() in pngwrite.c, after png_write_IEND().
825 Updated makefile.hpux to build a shared library.
826 version 1.0.9beta1 [November 10, 2000]
827 Fixed typo in scripts/makefile.hpux
828 Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
829 Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
830 Changed "cdrom.com" in documentation to "libpng.org"
831 Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).
832 Changed type of "params" from voidp to png_voidp in png_read|write_png().
833 Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h.
834 Revised the 3 instances of WRITEFILE in pngtest.c.
835 Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory.
836 Updated png.rc in dll/msvc project
837 Revised makefile.dec to define and use LIBPATH and INCPATH
838 Increased size of global png_libpng_ver[] array from 12 to 18 chars.
839 Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const.
840 Removed duplicate png_crc_finish() from png_handle_bKGD() function.
841 Added a warning when application calls png_read_update_info() multiple times.
842 Revised makefile.cygwin
843 Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.
844 Replaced png_set_empty_plte_permitted() with png_permit_mng_features().
845 version 1.0.9beta2 [November 19, 2000]
846 Renamed the "dll" subdirectory "projects".
847 Added borland project files to "projects" subdirectory.
848 Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.
849 Add error message in png_set_compression_buffer_size() when malloc fails.
850 version 1.0.9beta3 [November 23, 2000]
851 Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
852 Removed the png_flush() in pngwrite.c that crashes some applications
853 that don't set png_output_flush_fn.
854 Added makefile.macosx and makefile.aix to scripts directory.
855 version 1.0.9beta4 [December 1, 2000]
856 Change png_chunk_warning to png_warning in png_check_keyword().
857 Increased the first part of msg buffer from 16 to 18 in png_chunk_error().
858 version 1.0.9beta5 [December 15, 2000]
859 Added support for filter method 64 (for PNG datastreams embedded in MNG).
860 version 1.0.9beta6 [December 18, 2000]
861 Revised png_set_filter() to accept filter method 64 when appropriate.
862 Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to
863 help prevent applications from using MNG features in PNG datastreams.
864 Added png_permit_mng_features() function.
865 Revised libpng.3/libpng.txt. Changed "filter type" to "filter method".
866 version 1.0.9rc1 [December 23, 2000]
867 Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c
868 Fixed error handling of unknown compression type in png_decompress_chunk().
869 In pngconf.h, define __cdecl when _MSC_VER is defined.
870 version 1.0.9beta7 [December 28, 2000]
871 Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.
872 Revised memory management in png_set_hIST and png_handle_hIST in a backward
873 compatible manner. PLTE and tRNS were revised similarly.
874 Revised the iCCP chunk reader to ignore trailing garbage.
875 version 1.0.9beta8 [January 12, 2001]
876 Moved pngasmrd.h into pngconf.h.
877 Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
878 version 1.0.9beta9 [January 15, 2001]
879 Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
880 wince and msvc project module definition files.
881 Minor revision of makefile.cygwin.
882 Fixed bug with progressive reading of narrow interlaced images in pngpread.c
883 version 1.0.9beta10 [January 16, 2001]
884 Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.
885 Fixed "png_mmx_supported" typo in project definition files.
886 version 1.0.9beta11 [January 19, 2001]
887 Updated makefile.sgi to make shared library.
888 Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED
889 by default, for the benefit of DLL forward compatibility. These will
890 be re-enabled in version 1.2.0.
891 version 1.0.9rc2 [January 22, 2001]
892 Revised cygwin support.
893 version 1.0.9 [January 31, 2001]
894 Added check of cygwin's ALL_STATIC in pngconf.h
895 Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.
897 Send comments/corrections/commendations to
898 png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu
projects / rrdtool.git / blob