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5.2.0_vs_5.2.1.
1 GIFLIB NEWS
2
3
4 Version 5.2.1
5 ==============
6
7 This is the "Maybe I shouldn't have dome a release while imn surgical recovery" release.
8
9 * In gifbuild.c, avoid a core dump on no color map.
10
11 * Restore inadvertently removed library version numbers in Makefile.
12
13 Version 5.2.0
14 =============
15
16 The undocumented and deprecated GifQuantizeBuffer() entry point
17 has been moved to the util library to reduce libgif size and attack
18 surface. Applications needing this function are couraged to link the
19 util library or make their own copy.
20
21 The following obsolete utility programs are no longer installed:
22 gifecho, giffilter, gifinto, gifsponge. These were either installed in
23 error or have been obsolesced by modern image-transformmation tools
24 like ImageMagick convert. They may be removed entirely in a future
25 release.
26
27 * Address SourceForge issue #136: Stack-buffer-overflow in gifcolor.c:84
28
29 * Address SF bug #134: Giflib fails to slurp significant number of gifs
30
31 * Apply SPDX convention for license tagging.
32
33 Version 5.1.9
34 =============
35
36 The documentation directory now includes an HTMlified version of the
37 GIF89 standard, and a more detailed description of how LZW compression
38 is applied to GIFs.
39
40 * Address SF bug #129: The latest version of giflib cannot be build on windows.
41
42 * Address SF bug #126: Cannot compile giflib using c89
43
44 Version 5.1.8
45 =============
46
47 * Address SF bug #119: MemorySanitizer: FPE on unknown address
48
49 * Address SF bug #125: 5.1.7: xmlto is still required for tarball
50
51 * Address SF bug #124: 5.1.7: ar invocation is not crosscompile compatible
52
53 * Address SF bug #122: 5.1.7 installs manpages to wrong directory
54
55 * Address SF bug #121: make: getversion: Command not found
56
57 * Address SF bug #120: 5.1.7 does not build a proper library - no
58
59 Version 5.1.7
60 =============
61
62 Correct a minor packaging error (superfluous symlinks) in the 5.1.6 tarballs.
63
64 Version 5.1.6
65 =============
66
67 Build Fixes
68 -----------
69
70 Fix library installation in the Makefile.
71
72 Version 5.1.5
73 =============
74
75 Code Fixes
76 ----------
77
78 * Fix SF bug #114: Null dereferences in main() of gifclrmp
79
80 * Fix SF bug #113: Heap Buffer Overflow-2 in function DGifDecompressLine()
81 in cgif.c. This had been assigned CVE-2018-11490.
82
83 * Fix SF bug #111: segmentation fault in PrintCodeBlock
84
85 * Fix SF bug #109: Segmentation fault of giftool reading a crafted file
86
87 * Fix SF bug #107: Floating point exception in giftext utility
88
89 * Fix SF bug #105: heap buffer overflow in DumpScreen2RGB in gif2rgb.c:317
90
91 * Fix SF bug #104: Ineffective bounds check in DGifSlurp
92
93 ^ Fix SF bug #103: GIFLIB 5.1.4: DGifSlurp fails on empty comment
94
95 * Fix SF bug #87: Heap buffer overflow in 5.1.2 (gif2rgb).
96
97 Build Fixes
98 -----------
99
100 The horrible old autoconf build system has been removed with extreme prejudice.
101 You now build this simply by running "make" from the top-level directory.
102
103 Version 5.1.4
104 =============
105
106 Code Fixes
107 ----------
108
109 * Fix SF bug #94: giflib 5 loves to fail to load images... a LOT.
110
111 * Fix SF Bug #92: Fix buffer overread in gifbuild.
112
113 * Fix SF Bug #93: Add bounds check in gifbuild netscape2.0 path
114
115 * Fix SF Bug #89: Fix buffer overread in gifbuild.
116
117 Version 5.1.3
118 =============
119
120 As of this version the library and code has been seriously abused by fuzzers,
121 smoking out crash bugs (now fixed) induced by various kinds of severely
122 malformed GIF.
123
124 Code Fixes
125 ----------
126
127 * Prevent malloc randomess from causing the header output routine to emit
128 a GIF89 version string even when no GIF89 features are present. Only
129 breaks tests, not production code, but it's odd this wasn't caught sooner.
130
131 * Prevent malloc randomess from producing sporadic failures by causing
132 sanity checks added in 5.1.2 to misfire.
133
134 * Bulletproof gif2rgb against 0-height images. Addressed SF bug #78:
135 Heap overflow in gif2rgb with images of size 0, also SF bug #82.
136
137 * Remove unnecessary duplicate EGifClose() in gifcolor.c. Fixes SF bug #83
138 introduced in 5.1.2.
139
140 * Fix SF Bug #84: incorrect return of DGifSlurp().
141
142 Version 5.1.2
143 =============
144
145 Code Fixes
146 ----------
147
148 * Code hardening using reallocarray() from OpenBSD.
149
150 * Sanity check in giffilter catches files with malformed extension records
151 Fixes SourceForge bug #63: malformed gif causes segfault in giffilter.
152
153 * Inexpensive sanity check in DGifSlurp() catches malformed files with
154 no image descriptor. Fixes SourceForge bug #64: malformed gif causes
155 crash in giftool.
156
157 * Fix SourceForge bug #66: GifDrawBoxedText8x8() modifying constant input
158 parameter.
159
160 * Bail out of GIF read on invalid pixel width. Addresses Savannah bug
161 #67: invalid shift in dgif_lib.c
162
163 * Fix SourceForge bug #69: #69 Malformed: Gif file with no extension
164 block after a GRAPHICS_EXT_FUNC_CODE extension causes segfault (in
165 giftext).
166
167 * Fix SourceForge bug #71: Buffer overwrite when giffixing a malformed gif.
168
169 * Fix SourceForge bug #73: Null pointer deference in gifclrmap (only
170 reachable with malformed GIF).
171
172 * Fix SourceForge bug #74: Double free in gifsponge under 5.1.1,
173 for any valid gif image.
174
175 * Fix SourceForge bug #75: GAGetArgs overflows due to uncounted use of va_arg.
176
177 * Sanity check in giffix catches some malformed files. Addresses
178 SourceForge bug #77: dgif_lib.c: extension processing error
179
180
181 Version 5.1.1
182 =============
183
184 Code Fixes
185 ----------
186
187 * Numerous minor fixes in getarg.c. Affects only the utilities, not the
188 core library.
189
190 * Fix SourceForge bug #59: DGifOpen can segfault if DGifGetScreenDesc fails.
191
192 * SourceForge patch #20: In gifalloc, fix usage of realloc() in case of failure.
193
194 * Fix SourceForge bug #61 Leak in gifsponge.
195
196 Build Fixes
197 ----------
198
199 * glibtoolize port fix for OS X.
200
201 Version 5.1.0
202 =============
203
204 Changes to the API require a library major-version bump.
205
206 Code Fixes
207 ----------
208
209 * A small change to the API: DGifClose() and EGifClose() now take a
210 pointer-to-int second argument (like the corresponding openers)
211 where a diagnostic code will be deposited when they return
212 GIF_ERROR. This replaces the old behavior in which the GifFile
213 structure was left unfreed so the Error member in it could be filled
214 and remain available. The change was was required because it's
215 not always possible to free the struct afterwards. Case in point is
216 a C# wrapper for giflib (or any language/environment where you can't
217 just free objects allocated in a foreign shared library.)
218
219 * Minor fix for SF bug #56; BitsPerPixel may be left as uninitialized
220 value when reading (truncated) gif.
221
222 * Applied SF patch #17: Use a fallback on Windows where mkstemp is not
223 available.
224
225 * Applied SF patch #15: Code hardening, preventing spurious
226 defective-image messages.
227
228 Retirements
229 -----------
230
231 * Removed gif2raw from utils. Its blithe assumption that the EGA16
232 palette is a reliable default is now about 20 years obsolete. Format
233 conversion is better done with convert(1) from the ImageMagick suite,
234 anyway.
235
236 Version 5.0.6
237 =============
238
239 Minor fix for a rare memory leak (SF bug #55).
240
241 MinGW port fixes.
242
243 Repair the internal quantization function used in gif2rgb so it's
244 less vulnerable to cross-platform skew due to qsort() being unstable.
245 This shouldn't affect production use, it's just a cross-platform
246 issue for regression testing
247
248 Version 5.0.5
249 =============
250
251 Set the error return properly when a screen descriptor read fails.
252 Fixes for some minor API documentation bugs. Some internal manual
253 pages are not to be installed.
254
255 Version 5.0.4
256 =============
257
258 Fix for a rare misrendering bug when a GIF overruns the decompression-code
259 table. The image on which this was spotted was a relatively long-running
260 animated GIF; still images of ordinary size should have been immune.
261
262 Version 5.0.3
263 =============
264
265 Fix a build-system glitch so it will install manpages.
266
267 Version 5.0.2
268 =============
269
270 Documentation and polish
271 ------------------------
272 * Partial build is now possible on systems without xmlto.
273
274 Code Fixes
275 ----------
276 * Change unused return of EGifSetGifVersion() to void.
277 * Buffer overrun prevention in gifinto.
278
279 Version 5.0.1
280 =============
281
282 Documentation and polish
283 ------------------------
284 * There is now an installable manual page for the GIFLIB utility kit.
285
286 Retirements
287 -----------
288 * gifinter is gone. Use "convert -interlace line" from the ImageMagick suite.
289
290 Code Fixes
291 ----------
292 * In 5.0.0 the private gif89 bit wasn't being guaranteed cleared at
293 the beginning of EGifGetGifVersion(); this occasionally led to an
294 incorrect version prefix being issued dependent on the state of
295 malloced memory.
296 * An EGifSetGifVersion() function taking a GifFile argument has been
297 added for use with the low-level sequential API. This change requires
298 a bump of the library revision number.
299
300 Version 5.0.0
301 =============
302
303 Changes to the API require a library major-version bump. Certain
304 initialization functions have acquired an integer address argument for
305 passing back an error code, in order to avoid thread-unsafe static
306 storage. Application code using extension blocks will require minor
307 changes. A few functions have been renamed.
308
309 Code Fixes
310 ----------
311 * Fixes applied for CVE-2005-2974 and CVE-2005-3350
312 This closes Debian bug #337972.
313
314 New API Features
315 ----------------
316
317 Thread Safety
318 ~~~~~~~~~~~~~
319 The library is now completely re-entrant and thread-safe.
320
321 * Library error handling no longer uses a static cell to store the last
322 error code registered; that made the library thread-unsafe. For functions
323 other than GIF file openers, the code is now put in an Error member of
324 the GifFileType structure. The GifError() and GifLastError() functions
325 that referenced that static cell are gone, and the GifErrorString()
326 function introduced in the 4.2 release now takes an explicit error code
327 argument.
328 * GIF file openers - DGifOpenFileName(), DGifOpenFileHandle(), DGifOpen(),
329 EGifOpenFileName(), EGifOpenFileHandle(), and EGifOpen() - all now take
330 a final integer address argument. If non-null, this is used to pass
331 back an error code when the function returns NULL.
332
333 Extensions
334 ~~~~~~~~~~
335 The ExtensionBlock API has been repaired, solving some problems with GIF89
336 extension handling in earlier versions.
337
338 * DGifSlurp() and EGifSpew() now preserve trailing extension blocks with
339 no following image file.
340 * Three documented functions - EGifPutExtensionFirst(), EGifPutExtensionNext(),
341 and EGifPutExtensionLast() - have been relaced by new functions
342 EGifPutExtensionLeader(), EGifPutExtensionBlock(), and
343 EGifPutExtensionTrailer(). See the Compatibility section of
344 the library API documentation for details.
345 * New functions DGifSavedExtensionToGCB() and EGifGCBToSavedExtension()
346 make it easy to read and edit GIF89 graphics control blocks in saved images.
347
348 Namespacing
349 ~~~~~~~~~~~
350 All functions exported by giflib now have DGif, EGif, or Gif as a name prefix.
351
352 * Three documented functions - MakeMapObject(), FreeMapObject(), and
353 UnionColorMap() - have been renamed to GifMakeMapObject(),
354 GifFreeMapObject(), and GifUnionColorMap() respectively.
355 * The library Draw* functions are now prefixed GifDraw*, and the
356 text-drawing ones are suffixed with "8x8". This fixes a conflict
357 with the Windows API and leaves the door open for more general text-drawing
358 functions with different font sizes.
359
360 Other changes
361 ~~~~~~~~~~~~~
362 * DGifSlurp() and EGifSpew() now read and write interlaced images properly.
363 * The amazingly obscure colormap sort flag and pixel aspect ratio
364 features of GIF are now read and preserved, for whatever good that
365 may do.
366 * Six undocumented functions have been renamed; five of these take additional
367 or slightly different argument types. See the Compatibility section of
368 the library API documentation for details.
369 * There's now an EGifGetGifVersion() that computes the version EGifSpew()
370 will write.
371 * QuantizeBuffer() has been returned to the core library as GifQuantizeBuffer()
372 - turns out some important applications (notably mplayer) were using it.
373 * TRUE and FALSE macros are gone, also VoidPtr. No more namespace pollution.
374 * Various arguments have been made const where possible.
375
376 Retirements
377 -----------
378 * The (undocumented) gifinfo utility is gone. Use giftool -f instead.
379 * The gifburst utility is gone. Everybody has image viewers that
380 can pan now, and removing it gets rid of a dependency on Perl.
381 * gifcompose is gone. It was a decent idea when I wrote it in 1989,
382 but I did the same thing better and cleaner a decade later with
383 PILdriver in the PIL package. Removing it gets rid of a dependency
384 on shell.
385 * gif2x11 gifasm, gifcomb, gifflip, gifovly, gifpos, gifresize, and gifrotate
386 are all gone. The ImageMagick display(1)/convert(1) utilities and PILdriver
387 do these things better and in a format-independent way.
388 * Lennie Araki's Windows C++ wrapper is gone. It's eight years old,
389 unmaintained, he has dropped out of sight, and a better one needs to
390 be written to use the high-level GIFLIB API and GIF89 graphics
391 control extension support. We'll carry such a wrapper when we have
392 a maintainer for it.
393 * EGifSetVersion(), introduced in 4.2, is gone. The library always
394 writes GIF87 or GIF89 as required by the data. This change helps
395 with thread safety.
396
397 Utilities
398 ---------
399 * Several utilities have been renamed to (a) fix last-century's habit
400 of arbitarily smashing vowels out of names to make them just one or two
401 characters shorter, (b) ensure that every utility in this set has 'gif'
402 as a name prefix. Here's the list:
403
404 giffiltr -> giffilter
405 gifspnge -> gifsponge
406 icon2gif -> gifbuild
407 text2gif -> gifecho
408 raw2gif -> gif2raw
409
410 * To go with its new name, gif2raw now dumps raw pixels from a GIF if the
411 (previously required) size option is missing.
412 * Standalone rgb2gif is gone; the same capability is now a mode of gif2rgb.
413 * giftext displays the parsed contents of GIF89 graphics control blocks.
414 * gifbuild handles GIF89 graphics control blocks and Netscape animation
415 loop blocks; it can can display and update either.
416 * gifrotate and other filter utilities now preserve extension blocks,
417 including the graphics control information for transparency and delay time.
418 * A new utility, giftool, supports a wide variety of filtering operations
419 on GIFs, including: setting background and transparency colors, changing
420 interlacing, setting image delays, setting the user-input flag, and setting
421 the aspect-ratio byte. It can sequence multiple operations.
422 * The test-pattern generators gifbg, gifcolor, gihisto and gifwedge and the
423 code templates giffilter and gifsponge are no longer installed by default.
424
425 Documentation and polish
426 ------------------------
427 * The history.txt and build.txt and files from 4.2.0 now have .asc extensions
428 to indicate that they use asciidoc markup, contrasting with the txt
429 standards files from CompuServe.
430 * The documentation now includes "What's In A GIF", a very detailed narrative
431 description of the file format.
432 * The -A option of gifasm (for inserting a loop control block) is documented.
433 * The documentation directory includes a copy of the original GIF87
434 specification as well as GIF89's.
435 * The project now has a logo.
436
437 Version 4.2.0
438 =============
439
440 Now maintained by ESR again after handoff by Toshio Kuratomi.
441
442 Code Fixes
443 ----------
444 * Code updated internally to C99 to enable more correctness checks by
445 the compiler. Compiles under GCC 4.6.1 without errors or warnings.
446 * A rare resource leak in the colormap-object maker was found with
447 Coverity and fixed.
448 * The code now audits clean under Coverity and cppcheck.
449 * splint cleanup begun, there's a lot of work still to do on this.
450
451 New API Features
452 ----------------
453 * The default GIF version to write is now computed at write time from
454 the types of an image's extension blocks, but can be overridden with
455 EGifSetGifVersion().
456 * EGifSpew() is now thread-safe.
457 * Two new functions, GifError() and GifErrorString(),
458 return the error state in a form that can be used by programs.
459 * Two library functions - EGifOpenFileName() and EGifPutImageDesc() -
460 now have bool rather than int flag arguments. Since bool is a
461 typedef of int and TRUE/FALSE have been redefined to true/false,
462 both source and object compatibility with older library versions
463 should be preserved.
464 * GAGetArgs(), used only in the utilities, now returns bool rather
465 than int.
466 * The undocumented GIF_LIB_VERSION symbol is gone from the library header.
467 It has been replaced with three documented symbols: GIFLIB_MAJOR,
468 GIFLIB_MINOR, and GIFLIB_RELEASE.
469
470 Retirements
471 -----------
472 * The gif2epsn and gif2iris utilities are gone. They were full of
473 platform dependencies for platforms long dead. There are enough
474 platform-independent GIF viewers in the world that these weren't
475 adding any value. Removing these gets rid of a dependency on GL.
476 * The rle2gif, gif2rle, and gif2ps utilities are also gone. There are enough
477 multiformat image converters in the world that these weren't adding
478 any value either. Removing them reduces the codebase's dependencies.
479 * The undocumented DumpScreen2Gif() is gone from the library. The
480 only non-obsolete capture mode it supported was through X, and that
481 probably hasn't been used in years and is replaceable by any number
482 of capture utilities. Dropping this code makes the library's
483 portability issues go away.
484 * QuantizeBuffer(), GifQprintf(), PrintGifError(), GIF_ERROR()
485 and GIF_MESSAGE() have been removed from the core library.
486 They were used only by the utilities. QuantizeBuffer() has been
487 inlined where it was used and the latter three are now part of the
488 utility support library.
489 * The Game Boy Advanced test code is gone. The platform was discontinued
490 in 2008; more to the point, nobody ever documented the code's assumptions
491 or expected results.
492 * The Changelog file is now retained for archival purposes only, and because
493 autotools throws a hissy fit if there isn't one. The single point of
494 truth about changes and the reasons for them is the repository history.
495
496 Behavior changes
497 ----------------
498 * The -q option of the utilities is replaced by an opposite -v (verbose)
499 option; the default is now quiet for all platforms. Defaulting to chattiness
500 on MSDOS made sense in a world of slow text consoles, but not today.
501
502 Testing
503 -------
504 * There is now a proper regression-test suite; run 'make' in tests/.
505 The old test-unx script is now tests/visual-check and can be run
506 occasionally for a check with the Mark One Eyeball.
507
508 Documentation
509 -------------
510 * Build instructions now live in build.txt
511 * An overview of the giflib API now lives in api.txt.
512 * Documentation is now in DocBook-XML, so either HTML or man pages can
513 be generated from it.
514
515 Version 4.1.6
516 =============
517 Brown paper bag release. Fix a problem with header inclusion that could
518 prevent the library from building on some platforms.
519
520 Version 4.1.5
521 =============
522 This version has some important fixes for segfaults when working with corrupt
523 files. All users are strongly encouraged to upgrade.
524
525 Code Fixes
526 ----------
527 * Fix segfault in utilities due to referencing ColorMaps in GifFiles that had
528 no ColorMap present.
529 * Fix gif2x11 to work on 24 bit displays.
530 * Fix for giftext segfault when the GifFile does not store a global colormap.
531 * Checks to fail gracefully when an image contains improper LZ codes.
532 * Close file handles on failure in DGifOpenFileHandle()
533 * Checks to operate on files in binary mode on WIN32 as well as MSDOS.
534
535 Building
536 --------
537 * Add checks to make building on Win32 easier.
538 * Allow turning off gl_s, rle, and X11 support from the configure command line.
539 * Fix for finding a 32 bit integer type on some platforms.
540 * Only enable -Wall if we're using gcc.
541
542 Version 4.1.4
543 =============
544 This version fixes some bugs with deallocating ColorMaps. Fix building on
545 several platforms. Fix x86_64 builds to not hang the encoder.
546
547 * Fix several areas in decoding where we removed a ColorMap from our GifFile
548 but didn't set the pointer to NULL. This could lead to double free's of
549 the ColorMap.
550 * Fix a bug in dev2gif.c where we redefined some gl types incorrectly.
551 * Fix a bug in the gif LZW encoder that was triggered on modern 64 bit
552 platforms.
553 * Fix building on Windows. Note -- there has been one API changing event for
554 Windows (renaming DrawText to DrawGifText.) This should have conflicted with
555 Windows API and therefore caused the builds to fail previously. If you had
556 it working with DrawText before, apologies, you'll need to change to
557 DrawGifText in your code. This only affects Windows.
558 * Add support for building on The Game Boy Advance. Note: Due to the GBA's
559 limited memory, the API for the GBA uses short's in many places where the
560 other platforms use ints. This shouldn't affect anyone unless you've
561 been able to get an older version of the code to run on GBA and want to
562 start using this version instead. A recompile of your dependent code
563 will be necessary in this case.
564
565 Version 4.1.3
566 =============
567 This version fixes some bugs in the Extension writing code in
568 EGifPutExtensionFirst, Next, and Last. Using these functions, it is possible
569 to output extensions that contain multiple subblocks. Additionally, library
570 code has been updated to use these functions, making it safe to output
571 long Comments, and multi-block extensions read in from another file.
572
573 * giflib is now hosted on sourceforge with libungif:
574 http://sourceforge.net/projects/libungif
575 * Make the EGifPutExtension{First,Next,Last} family of functions use WRITE
576 so user defined WRITE methods will output them correctly.
577 * Modify EGifSpew and EGifPutComment to use EGifPutExtension{First,Next,Last}
578 so we won't output broken GIFs when dealing with GIFs with multiple
579 subblocks.
580 * More -Wall fixes revealed while testing on Solaris and FreeBSD.
581 * Updated the gif_lib.html documentation to not use EGifPutExtension when
582 dealing with multiple subblocks. Use EGifPutExtension{First,Next,Last}
583 instead.
584 * Some Windows code from the old CVS repository now available in the windows
585 subdirectory. I don't have a Windows environment to test and maintain this
586 but maybe someone out there will find it useful. Caveat hacker.
587
588 Version 4.1.2
589 =============
590 * Numerous bug fixes from people on the old libungif mailing list.
591 * GIF_ERROR and GIF_MESSAGE are on the deprecation list as they are also
592 utility helper functions rather than essential to the functioning of the
593 library.
594 * Complete deprecation list is now in the README file
595 * Audited the sources with gcc -Wall. Everything detectable has now been fixed.
596 * Ran the library code through indent.
597
598 Version 4.1.1
599 =============
600 * Merge in many bug fixes that were sent in while I was hiking the
601 Appalachian Trail.
602 * The qprintf methods of the library are now deprecated. Do not use
603 GifQuietPrint or GifQprintf. These should have been pushed out into the
604 utility helper library instead of sitting around in the library proper at
605 the same time as the getarg functions were moved out. Getting rid of these
606 will let us get rid of our dependence on stdarg.h/varargs.h (Which a Gif
607 reading library has no business requiring.)
608
609 Version 4.1.0
610 =============
611 * Several minor memory leaks in error conditions have been plugged.
612 * New Function EGifOpen(void *userData, OutputFunc writeFunc) allows user
613 specified gif writing functions.
614 * Old copyright notices in a few source files have been updated. All library
615 copyrights should now reflect the copyright notice in the COPYING file.
616
617 Version 4.0.0 -- giflib
618 =======================
619 This version of the giflib library merges Eric Raymond's giflib-3.0 release
620 with the libungif-4.0 release to give people a binary compatible choice
621 between the two libraries and gives me the chance to add bugfixes to giflib
622 that have been incorporated in libungif.
623
624 PLEASE READ THE FILE PATENT_PROBLEMS BEFORE USING THIS LIBRARY!
625
626 Version 4.0.0
627 =============
628 Major fixes have been made to the code that handles Extensions.
629 Unfortunately, this causes binary incompatibility with giflib-3.0 and
630 libungif-3.x. However, the API is still intact. I am, however, deprecating
631 the use of saveImage[x].Function. Use
632 saveImage[x].ExtensionBlocks[y].Function instead.
633
634 Version 3.1.1
635 =============
636 The following bugs which caused SegFaults have been fixed:
637 * When reading gif files with extensions, DGifSlurp would violate memory.
638 * When closing a gif that had a local colormap, DGifCloseFile would attempt
639 to free the colormap twice.
640 * Fix a potential memory leak in DGifSlurp.
641 * New function DGifOpen to allow specifying a user definable gif reading
642 function.
643
644 Version 3.1.0
645 =============
646 * Add a new function:
647 GifFileType *DGifOpen(void * userData, InputFunc readFunc)
648 to read the gif image from a user defined input function.
649 * A few bugfixes.
650
651 Version 3.0
652 ===========
653
654 Changes from Eric Raymond's libgif
655 ----------------------------------
656 * A new gif encoder that makes uncompressed gifs rather than standard,
657 LZW-compressed gifs. This is actually the major motivating factor behind
658 libungif; to provide third-party distributors a means to provide a gif
659 library without the patented LZW encoder.
660 * A new configure script to make compilation of the library on multiple
661 platforms easier. The package should now build shared libraries on all
662 platforms supported by GNU libtool.
663 * Removed the getarg functions from libgif. These were not part of the
664 public API and only used by the tools in the utils directory so I separated
665 them from the rest of the library.
666 * Fixed a few bugs in the tools in the utils directory.
667
668 Version 3.0
669 ===========
670
671 New features
672 ------------
673 * Incorporated Sirtaj Kang's changes to make both static and shared libs.
674 * All the utility and library docs are HTML now.
675 * The library and relevant utilities are now fully GIF89-aware.
676 * Functions for drawing text and boxes on saved images are documented.
677 * The distribution is now issued under a simple X-Consortium-style license.
678 * Can now generate package RPMs and LSM automatically.
679 * Home page with Web-acessible documentation at http://www.ccil.org/~esr/giflib
680
681 Bug fixes
682 ---------
683 * Fix giftext to not core dump on a null extension record.
684 * Incorporate Philip VanBaren's change to prevent a core dump in gifasm.
685
686 Version 2.3
687 ===========
688 * Fixed a core-dump bug in gifcomb revealed by ELF environment in Linux 1.2.13.
689
690 Version 2.2b
691 ============
692 * Added gifburst tool.
693
694 Version 2.2
695 ===========
696 * Linux is supported.
697
698 Version 2.1
699 ===========
700 * Added the gifovly tool, which supports making a composite from several GIF
701 images.
702 * Used gifovly to implement a full-fledged pasteup program in shell. It's
703 called gifcompose and lives in the util directory.
704 * Added a copy of the GIF89 standard to the doc directory (gif89.txt);
705 also a description of the preferred compression method (lzgif.txt).
706
707 Version 2.0
708 ===========
709 With this version, development was taken over from Gershon Elber by Eric
710 S. Raymond <esr@snark.thyrsus.com>. Note that I, esr, have pretty much
711 adhered to Gershon's coding style, even though it's quite baroque and DOS-
712 headed by my standards.
713
714 Library Improvements
715 --------------------
716 * New DGifSlurp() and EGifSpew() library entry points allow all GIF-bashing
717 to be done in core on machines with sufficient memory. Writing code to
718 slice'n'dice multiple GIFs in non-sequential ways is now much easier (send
719 kudos and brickbats to esr, small unmarked bills preferred).
720 * The interface has changed somewhat. Members in the GifFileType structure
721 have been renamed and regrouped. This was required for support of the
722 SavedImages member (which enables the new functions mentioned in 1). Also,
723 there is a new data type for allocated color maps and routines to handle
724 it conveniently.
725 * Some minor bugs have been fixed. Most notably, the DGif code now correctly
726 handles the possibility of more than one code block per extension record,
727 as per the GIF spec. It's not clear, however, that anyone ever has or
728 ever will use this feature for anything...
729
730 New Tools and Options
731 ---------------------
732 * A brand new, ultra-spiffy tool `icon2gif' is included. It assembles named
733 GIFs with editable text color map & icon raster representations to produce
734 multi-image GIFs usable as graphical resource files. It can also dump most
735 GIFs in the same text-only form it parses. This makes it easy to edit GIFs
736 even if you don't have a graphics editor.
737 * The gifclip utility supports a new `-c' (complement) option that allows you
738 to perform an `inverse clip', removing horizontal or vertical bands from an
739 image.
740 * The gifclrmp utility supports a new `-t' switch for shuffling color index
741 values.
742 * A new tool `gifcolor' generates test pattern from colormap input.
743
744 New Documentation and Examples
745 ------------------------------
746 * The documentation has been overhauled completely and translated out of the
747 dialect spoken by the estimable Mr. Elber into something like standard
748 English :-).
749 * Two source code files gifspnge.c and giffiltr.c have been added to the
750 util directory. These are GIF copiers that exercise the I/O routines,
751 provided as skeletons for your applications. Read the comments in them
752 for more info.
753 * The util Makefile for UNIX has been improved. It now uses the cc/gcc -s
754 option rather than strip(1). There are now separate install productions,
755 so you can test new versions in util before installation for production
756 (the top-level make script still does an install).
757
758 Version 1.2
759 ===========
760 * GIFFIX - a new tool to attempt and fix broken GIF images. Currently fix
761 images that has EOF prematurely by padding with the darkest color.
762 * Make GIF2BGI display as much as it can considering the mem. avail.
763 * Add -q flag to all tools for quite running scan line number mode.
764 * Fix a (minor!?) bug in the GIF decoder when encountering code 4095.
765 * New tools (RGB2GIF and GIF2RGB) to convert GIF to/from 24 bits RGB images.
766 * New tool GIFROTAT to rotate a gif image by an arbitrary angle.
767 * GifRSize was updated to resize by an arbitrary factor.
768
769 Version 1.1
770 ===========
771 * GIF2BGI - a new utility to display GIF images using Borland's BGI drivers
772 (if you have one...)
773 * TEXT2GIF - Converts plain text into GIF images.
774 * GIF2IRIS - SGI4D display program for GIF images.
775 * GIF_LIB naming convension has been modified to make sure it has unique
776 names (see gif_lib.h).
777 * Support for SGI4D gl and X11 window grabbing has been added to the
778 library. SGI4D input is quantizied into 8 bits.
779 Also support for EGA/VGA devices has been added as well.
780 see Dev2gif.c module.
781 * Support for the new gif89a format has been added.
782
783
784