wok-next view libpng/stuff/patches/libpng-1.6.35-apng.patch @ rev 21573
updated dansguardian (2.10.1.1 -> 2.12.0.3)
| author | Hans-G?nter Theisgen |
|---|---|
| date | Mon Jun 22 17:38:17 2020 +0100 (2020-06-22) |
| parents | e7a485521d6a |
| children |
line source
1 diff -Naru libpng-1.6.35.org/png.h libpng-1.6.35/png.h
2 --- libpng-1.6.35.org/png.h 2018-07-21 19:16:37.185142931 +0900
3 +++ libpng-1.6.35/png.h 2018-07-21 19:16:16.327364638 +0900
4 @@ -361,6 +361,10 @@
5 # include "pnglibconf.h"
6 #endif
8 +#define PNG_APNG_SUPPORTED
9 +#define PNG_READ_APNG_SUPPORTED
10 +#define PNG_WRITE_APNG_SUPPORTED
11 +
12 #ifndef PNG_VERSION_INFO_ONLY
13 /* Machine specific configuration. */
14 # include "pngconf.h"
15 @@ -456,6 +460,17 @@
16 * See pngconf.h for base types that vary by machine/system
17 */
19 +#ifdef PNG_APNG_SUPPORTED
20 +/* dispose_op flags from inside fcTL */
21 +#define PNG_DISPOSE_OP_NONE 0x00U
22 +#define PNG_DISPOSE_OP_BACKGROUND 0x01U
23 +#define PNG_DISPOSE_OP_PREVIOUS 0x02U
24 +
25 +/* blend_op flags from inside fcTL */
26 +#define PNG_BLEND_OP_SOURCE 0x00U
27 +#define PNG_BLEND_OP_OVER 0x01U
28 +#endif /* PNG_APNG_SUPPORTED */
29 +
30 /* This triggers a compiler error in png.c, if png.c and png.h
31 * do not agree upon the version number.
32 */
33 @@ -777,6 +792,10 @@
34 #define PNG_INFO_sCAL 0x4000U /* ESR, 1.0.6 */
35 #define PNG_INFO_IDAT 0x8000U /* ESR, 1.0.6 */
36 #define PNG_INFO_eXIf 0x10000U /* GR-P, 1.6.31 */
37 +#ifdef PNG_APNG_SUPPORTED
38 +#define PNG_INFO_acTL 0x20000U
39 +#define PNG_INFO_fcTL 0x40000U
40 +#endif
42 /* This is used for the transformation routines, as some of them
43 * change these values for the row. It also should enable using
44 @@ -814,6 +833,10 @@
45 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
46 typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop));
47 typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop));
48 +#ifdef PNG_APNG_SUPPORTED
49 +typedef PNG_CALLBACK(void, *png_progressive_frame_ptr, (png_structp,
50 + png_uint_32));
51 +#endif
53 /* The following callback receives png_uint_32 row_number, int pass for the
54 * png_bytep data of the row. When transforming an interlaced image the
55 @@ -3257,6 +3280,74 @@
56 /*******************************************************************************
57 * END OF HARDWARE AND SOFTWARE OPTIONS
58 ******************************************************************************/
59 +#ifdef PNG_APNG_SUPPORTED
60 +PNG_EXPORT(250, png_uint_32, png_get_acTL, (png_structp png_ptr,
61 + png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays));
62 +
63 +PNG_EXPORT(251, png_uint_32, png_set_acTL, (png_structp png_ptr,
64 + png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays));
65 +
66 +PNG_EXPORT(252, png_uint_32, png_get_num_frames, (png_structp png_ptr,
67 + png_infop info_ptr));
68 +
69 +PNG_EXPORT(253, png_uint_32, png_get_num_plays, (png_structp png_ptr,
70 + png_infop info_ptr));
71 +
72 +PNG_EXPORT(254, png_uint_32, png_get_next_frame_fcTL,
73 + (png_structp png_ptr, png_infop info_ptr, png_uint_32 *width,
74 + png_uint_32 *height, png_uint_32 *x_offset, png_uint_32 *y_offset,
75 + png_uint_16 *delay_num, png_uint_16 *delay_den, png_byte *dispose_op,
76 + png_byte *blend_op));
77 +
78 +PNG_EXPORT(255, png_uint_32, png_set_next_frame_fcTL,
79 + (png_structp png_ptr, png_infop info_ptr, png_uint_32 width,
80 + png_uint_32 height, png_uint_32 x_offset, png_uint_32 y_offset,
81 + png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
82 + png_byte blend_op));
83 +
84 +PNG_EXPORT(256, png_uint_32, png_get_next_frame_width,
85 + (png_structp png_ptr, png_infop info_ptr));
86 +PNG_EXPORT(257, png_uint_32, png_get_next_frame_height,
87 + (png_structp png_ptr, png_infop info_ptr));
88 +PNG_EXPORT(258, png_uint_32, png_get_next_frame_x_offset,
89 + (png_structp png_ptr, png_infop info_ptr));
90 +PNG_EXPORT(259, png_uint_32, png_get_next_frame_y_offset,
91 + (png_structp png_ptr, png_infop info_ptr));
92 +PNG_EXPORT(260, png_uint_16, png_get_next_frame_delay_num,
93 + (png_structp png_ptr, png_infop info_ptr));
94 +PNG_EXPORT(261, png_uint_16, png_get_next_frame_delay_den,
95 + (png_structp png_ptr, png_infop info_ptr));
96 +PNG_EXPORT(262, png_byte, png_get_next_frame_dispose_op,
97 + (png_structp png_ptr, png_infop info_ptr));
98 +PNG_EXPORT(263, png_byte, png_get_next_frame_blend_op,
99 + (png_structp png_ptr, png_infop info_ptr));
100 +PNG_EXPORT(264, png_byte, png_get_first_frame_is_hidden,
101 + (png_structp png_ptr, png_infop info_ptr));
102 +PNG_EXPORT(265, png_uint_32, png_set_first_frame_is_hidden,
103 + (png_structp png_ptr, png_infop info_ptr, png_byte is_hidden));
104 +
105 +#ifdef PNG_READ_APNG_SUPPORTED
106 +PNG_EXPORT(266, void, png_read_frame_head, (png_structp png_ptr,
107 + png_infop info_ptr));
108 +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
109 +PNG_EXPORT(267, void, png_set_progressive_frame_fn, (png_structp png_ptr,
110 + png_progressive_frame_ptr frame_info_fn,
111 + png_progressive_frame_ptr frame_end_fn));
112 +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
113 +#endif /* PNG_READ_APNG_SUPPORTED */
114 +
115 +#ifdef PNG_WRITE_APNG_SUPPORTED
116 +PNG_EXPORT(268, void, png_write_frame_head, (png_structp png_ptr,
117 + png_infop info_ptr, png_bytepp row_pointers,
118 + png_uint_32 width, png_uint_32 height,
119 + png_uint_32 x_offset, png_uint_32 y_offset,
120 + png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
121 + png_byte blend_op));
122 +
123 +PNG_EXPORT(269, void, png_write_frame_tail, (png_structp png_ptr,
124 + png_infop info_ptr));
125 +#endif /* PNG_WRITE_APNG_SUPPORTED */
126 +#endif /* PNG_APNG_SUPPORTED */
128 /* Maintainer: Put new public prototypes here ^, in libpng.3, in project
129 * defs, and in scripts/symbols.def.
130 @@ -3266,7 +3357,11 @@
131 * one to use is one more than this.)
132 */
133 #ifdef PNG_EXPORT_LAST_ORDINAL
134 +#ifdef PNG_APNG_SUPPORTED
135 + PNG_EXPORT_LAST_ORDINAL(269);
136 +#else
137 PNG_EXPORT_LAST_ORDINAL(249);
138 +#endif /* PNG_APNG_SUPPORTED */
139 #endif
141 #ifdef __cplusplus
142 diff -Naru libpng-1.6.35.org/pngget.c libpng-1.6.35/pngget.c
143 --- libpng-1.6.35.org/pngget.c 2018-07-21 19:16:37.185142931 +0900
144 +++ libpng-1.6.35/pngget.c 2018-07-21 19:16:16.229356281 +0900
145 @@ -1246,4 +1246,166 @@
146 # endif
147 #endif
149 +#ifdef PNG_APNG_SUPPORTED
150 +png_uint_32 PNGAPI
151 +png_get_acTL(png_structp png_ptr, png_infop info_ptr,
152 + png_uint_32 *num_frames, png_uint_32 *num_plays)
153 +{
154 + png_debug1(1, "in %s retrieval function", "acTL");
155 +
156 + if (png_ptr != NULL && info_ptr != NULL &&
157 + (info_ptr->valid & PNG_INFO_acTL) &&
158 + num_frames != NULL && num_plays != NULL)
159 + {
160 + *num_frames = info_ptr->num_frames;
161 + *num_plays = info_ptr->num_plays;
162 + return (1);
163 + }
164 +
165 + return (0);
166 +}
167 +
168 +png_uint_32 PNGAPI
169 +png_get_num_frames(png_structp png_ptr, png_infop info_ptr)
170 +{
171 + png_debug(1, "in png_get_num_frames()");
172 +
173 + if (png_ptr != NULL && info_ptr != NULL)
174 + return (info_ptr->num_frames);
175 + return (0);
176 +}
177 +
178 +png_uint_32 PNGAPI
179 +png_get_num_plays(png_structp png_ptr, png_infop info_ptr)
180 +{
181 + png_debug(1, "in png_get_num_plays()");
182 +
183 + if (png_ptr != NULL && info_ptr != NULL)
184 + return (info_ptr->num_plays);
185 + return (0);
186 +}
187 +
188 +png_uint_32 PNGAPI
189 +png_get_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
190 + png_uint_32 *width, png_uint_32 *height,
191 + png_uint_32 *x_offset, png_uint_32 *y_offset,
192 + png_uint_16 *delay_num, png_uint_16 *delay_den,
193 + png_byte *dispose_op, png_byte *blend_op)
194 +{
195 + png_debug1(1, "in %s retrieval function", "fcTL");
196 +
197 + if (png_ptr != NULL && info_ptr != NULL &&
198 + (info_ptr->valid & PNG_INFO_fcTL) &&
199 + width != NULL && height != NULL &&
200 + x_offset != NULL && y_offset != NULL &&
201 + delay_num != NULL && delay_den != NULL &&
202 + dispose_op != NULL && blend_op != NULL)
203 + {
204 + *width = info_ptr->next_frame_width;
205 + *height = info_ptr->next_frame_height;
206 + *x_offset = info_ptr->next_frame_x_offset;
207 + *y_offset = info_ptr->next_frame_y_offset;
208 + *delay_num = info_ptr->next_frame_delay_num;
209 + *delay_den = info_ptr->next_frame_delay_den;
210 + *dispose_op = info_ptr->next_frame_dispose_op;
211 + *blend_op = info_ptr->next_frame_blend_op;
212 + return (1);
213 + }
214 +
215 + return (0);
216 +}
217 +
218 +png_uint_32 PNGAPI
219 +png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr)
220 +{
221 + png_debug(1, "in png_get_next_frame_width()");
222 +
223 + if (png_ptr != NULL && info_ptr != NULL)
224 + return (info_ptr->next_frame_width);
225 + return (0);
226 +}
227 +
228 +png_uint_32 PNGAPI
229 +png_get_next_frame_height(png_structp png_ptr, png_infop info_ptr)
230 +{
231 + png_debug(1, "in png_get_next_frame_height()");
232 +
233 + if (png_ptr != NULL && info_ptr != NULL)
234 + return (info_ptr->next_frame_height);
235 + return (0);
236 +}
237 +
238 +png_uint_32 PNGAPI
239 +png_get_next_frame_x_offset(png_structp png_ptr, png_infop info_ptr)
240 +{
241 + png_debug(1, "in png_get_next_frame_x_offset()");
242 +
243 + if (png_ptr != NULL && info_ptr != NULL)
244 + return (info_ptr->next_frame_x_offset);
245 + return (0);
246 +}
247 +
248 +png_uint_32 PNGAPI
249 +png_get_next_frame_y_offset(png_structp png_ptr, png_infop info_ptr)
250 +{
251 + png_debug(1, "in png_get_next_frame_y_offset()");
252 +
253 + if (png_ptr != NULL && info_ptr != NULL)
254 + return (info_ptr->next_frame_y_offset);
255 + return (0);
256 +}
257 +
258 +png_uint_16 PNGAPI
259 +png_get_next_frame_delay_num(png_structp png_ptr, png_infop info_ptr)
260 +{
261 + png_debug(1, "in png_get_next_frame_delay_num()");
262 +
263 + if (png_ptr != NULL && info_ptr != NULL)
264 + return (info_ptr->next_frame_delay_num);
265 + return (0);
266 +}
267 +
268 +png_uint_16 PNGAPI
269 +png_get_next_frame_delay_den(png_structp png_ptr, png_infop info_ptr)
270 +{
271 + png_debug(1, "in png_get_next_frame_delay_den()");
272 +
273 + if (png_ptr != NULL && info_ptr != NULL)
274 + return (info_ptr->next_frame_delay_den);
275 + return (0);
276 +}
277 +
278 +png_byte PNGAPI
279 +png_get_next_frame_dispose_op(png_structp png_ptr, png_infop info_ptr)
280 +{
281 + png_debug(1, "in png_get_next_frame_dispose_op()");
282 +
283 + if (png_ptr != NULL && info_ptr != NULL)
284 + return (info_ptr->next_frame_dispose_op);
285 + return (0);
286 +}
287 +
288 +png_byte PNGAPI
289 +png_get_next_frame_blend_op(png_structp png_ptr, png_infop info_ptr)
290 +{
291 + png_debug(1, "in png_get_next_frame_blend_op()");
292 +
293 + if (png_ptr != NULL && info_ptr != NULL)
294 + return (info_ptr->next_frame_blend_op);
295 + return (0);
296 +}
297 +
298 +png_byte PNGAPI
299 +png_get_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr)
300 +{
301 + png_debug(1, "in png_first_frame_is_hidden()");
302 +
303 + if (png_ptr != NULL)
304 + return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN);
305 +
306 + PNG_UNUSED(info_ptr)
307 +
308 + return 0;
309 +}
310 +#endif /* PNG_APNG_SUPPORTED */
311 #endif /* READ || WRITE */
312 diff -Naru libpng-1.6.35.org/pnginfo.h libpng-1.6.35/pnginfo.h
313 --- libpng-1.6.35.org/pnginfo.h 2018-07-21 19:16:37.185142931 +0900
314 +++ libpng-1.6.35/pnginfo.h 2018-07-21 19:16:16.228356197 +0900
315 @@ -263,5 +263,18 @@
316 png_bytepp row_pointers; /* the image bits */
317 #endif
319 +#ifdef PNG_APNG_SUPPORTED
320 + png_uint_32 num_frames; /* including default image */
321 + png_uint_32 num_plays;
322 + png_uint_32 next_frame_width;
323 + png_uint_32 next_frame_height;
324 + png_uint_32 next_frame_x_offset;
325 + png_uint_32 next_frame_y_offset;
326 + png_uint_16 next_frame_delay_num;
327 + png_uint_16 next_frame_delay_den;
328 + png_byte next_frame_dispose_op;
329 + png_byte next_frame_blend_op;
330 +#endif
331 +
332 };
333 #endif /* PNGINFO_H */
334 diff -Naru libpng-1.6.35.org/pngpread.c libpng-1.6.35/pngpread.c
335 --- libpng-1.6.35.org/pngpread.c 2018-07-21 19:16:37.185142931 +0900
336 +++ libpng-1.6.35/pngpread.c 2018-07-21 19:16:16.228356197 +0900
337 @@ -195,6 +195,106 @@
339 chunk_name = png_ptr->chunk_name;
341 +#ifdef PNG_READ_APNG_SUPPORTED
342 + if (png_ptr->num_frames_read > 0 &&
343 + png_ptr->num_frames_read < info_ptr->num_frames)
344 + {
345 + if (chunk_name == png_IDAT)
346 + {
347 + /* Discard trailing IDATs for the first frame */
348 + if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read > 1)
349 + png_error(png_ptr, "out of place IDAT");
350 +
351 + if (png_ptr->push_length + 4 > png_ptr->buffer_size)
352 + {
353 + png_push_save_buffer(png_ptr);
354 + return;
355 + }
356 +
357 + png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
358 + return;
359 + }
360 + else if (chunk_name == png_fdAT)
361 + {
362 + if (png_ptr->buffer_size < 4)
363 + {
364 + png_push_save_buffer(png_ptr);
365 + return;
366 + }
367 +
368 + png_ensure_sequence_number(png_ptr, 4);
369 +
370 + if (!(png_ptr->mode & PNG_HAVE_fcTL))
371 + {
372 + /* Discard trailing fdATs for frames other than the first */
373 + if (png_ptr->num_frames_read < 2)
374 + png_error(png_ptr, "out of place fdAT");
375 +
376 + if (png_ptr->push_length + 4 > png_ptr->buffer_size)
377 + {
378 + png_push_save_buffer(png_ptr);
379 + return;
380 + }
381 +
382 + png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
383 + return;
384 + }
385 +
386 + else
387 + {
388 + /* frame data follows */
389 + png_ptr->idat_size = png_ptr->push_length - 4;
390 + png_ptr->mode |= PNG_HAVE_IDAT;
391 + png_ptr->process_mode = PNG_READ_IDAT_MODE;
392 +
393 + return;
394 + }
395 + }
396 +
397 + else if (chunk_name == png_fcTL)
398 + {
399 + if (png_ptr->push_length + 4 > png_ptr->buffer_size)
400 + {
401 + png_push_save_buffer(png_ptr);
402 + return;
403 + }
404 +
405 + png_read_reset(png_ptr);
406 + png_ptr->mode &= ~PNG_HAVE_fcTL;
407 +
408 + png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
409 +
410 + if (!(png_ptr->mode & PNG_HAVE_fcTL))
411 + png_error(png_ptr, "missing required fcTL chunk");
412 +
413 + png_read_reinit(png_ptr, info_ptr);
414 + png_progressive_read_reset(png_ptr);
415 +
416 + if (png_ptr->frame_info_fn != NULL)
417 + (*(png_ptr->frame_info_fn))(png_ptr, png_ptr->num_frames_read);
418 +
419 + png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
420 +
421 + return;
422 + }
423 +
424 + else
425 + {
426 + if (png_ptr->push_length + 4 > png_ptr->buffer_size)
427 + {
428 + png_push_save_buffer(png_ptr);
429 + return;
430 + }
431 + png_warning(png_ptr, "Skipped (ignored) a chunk "
432 + "between APNG chunks");
433 + png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
434 + return;
435 + }
436 +
437 + return;
438 + }
439 +#endif /* PNG_READ_APNG_SUPPORTED */
440 +
441 if (chunk_name == png_IDAT)
442 {
443 if ((png_ptr->mode & PNG_AFTER_IDAT) != 0)
444 @@ -261,6 +361,9 @@
446 else if (chunk_name == png_IDAT)
447 {
448 +#ifdef PNG_READ_APNG_SUPPORTED
449 + png_have_info(png_ptr, info_ptr);
450 +#endif
451 png_ptr->idat_size = png_ptr->push_length;
452 png_ptr->process_mode = PNG_READ_IDAT_MODE;
453 png_push_have_info(png_ptr, info_ptr);
454 @@ -406,6 +509,30 @@
455 png_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
456 }
457 #endif
458 +#ifdef PNG_READ_APNG_SUPPORTED
459 + else if (chunk_name == png_acTL)
460 + {
461 + if (png_ptr->push_length + 4 > png_ptr->buffer_size)
462 + {
463 + png_push_save_buffer(png_ptr);
464 + return;
465 + }
466 +
467 + png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length);
468 + }
469 +
470 + else if (chunk_name == png_fcTL)
471 + {
472 + if (png_ptr->push_length + 4 > png_ptr->buffer_size)
473 + {
474 + png_push_save_buffer(png_ptr);
475 + return;
476 + }
477 +
478 + png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
479 + }
480 +
481 +#endif /* PNG_READ_APNG_SUPPORTED */
483 else
484 {
485 @@ -539,7 +666,11 @@
486 png_byte chunk_tag[4];
488 /* TODO: this code can be commoned up with the same code in push_read */
489 +#ifdef PNG_READ_APNG_SUPPORTED
490 + PNG_PUSH_SAVE_BUFFER_IF_LT(12)
491 +#else
492 PNG_PUSH_SAVE_BUFFER_IF_LT(8)
493 +#endif
494 png_push_fill_buffer(png_ptr, chunk_length, 4);
495 png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
496 png_reset_crc(png_ptr);
497 @@ -547,17 +678,64 @@
498 png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag);
499 png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
501 +#ifdef PNG_READ_APNG_SUPPORTED
502 + if (png_ptr->chunk_name != png_fdAT && png_ptr->num_frames_read > 0)
503 + {
504 + if (png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)
505 + {
506 + png_ptr->process_mode = PNG_READ_CHUNK_MODE;
507 + if (png_ptr->frame_end_fn != NULL)
508 + (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
509 + png_ptr->num_frames_read++;
510 + return;
511 + }
512 + else
513 + {
514 + if (png_ptr->chunk_name == png_IEND)
515 + png_error(png_ptr, "Not enough image data");
516 + if (png_ptr->push_length + 4 > png_ptr->buffer_size)
517 + {
518 + png_push_save_buffer(png_ptr);
519 + return;
520 + }
521 + png_warning(png_ptr, "Skipping (ignoring) a chunk between "
522 + "APNG chunks");
523 + png_crc_finish(png_ptr, png_ptr->push_length);
524 + png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
525 + return;
526 + }
527 + }
528 + else
529 +#endif
530 +#ifdef PNG_READ_APNG_SUPPORTED
531 + if (png_ptr->chunk_name != png_IDAT && png_ptr->num_frames_read == 0)
532 +#else
533 if (png_ptr->chunk_name != png_IDAT)
534 +#endif
535 {
536 png_ptr->process_mode = PNG_READ_CHUNK_MODE;
538 if ((png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0)
539 png_error(png_ptr, "Not enough compressed data");
541 +#ifdef PNG_READ_APNG_SUPPORTED
542 + if (png_ptr->frame_end_fn != NULL)
543 + (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
544 + png_ptr->num_frames_read++;
545 +#endif
546 +
547 return;
548 }
550 png_ptr->idat_size = png_ptr->push_length;
551 +
552 +#ifdef PNG_READ_APNG_SUPPORTED
553 + if (png_ptr->num_frames_read > 0)
554 + {
555 + png_ensure_sequence_number(png_ptr, 4);
556 + png_ptr->idat_size -= 4;
557 + }
558 +#endif
559 }
561 if (png_ptr->idat_size != 0 && png_ptr->save_buffer_size != 0)
562 @@ -631,6 +809,15 @@
563 if (!(buffer_length > 0) || buffer == NULL)
564 png_error(png_ptr, "No IDAT data (internal error)");
566 +#ifdef PNG_READ_APNG_SUPPORTED
567 + /* If the app is not APNG-aware, decode only the first frame */
568 + if (!(png_ptr->apng_flags & PNG_APNG_APP) && png_ptr->num_frames_read > 0)
569 + {
570 + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED;
571 + return;
572 + }
573 +#endif
574 +
575 /* This routine must process all the data it has been given
576 * before returning, calling the row callback as required to
577 * handle the uncompressed results.
578 @@ -1085,6 +1272,18 @@
579 png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer);
580 }
582 +#ifdef PNG_READ_APNG_SUPPORTED
583 +void PNGAPI
584 +png_set_progressive_frame_fn(png_structp png_ptr,
585 + png_progressive_frame_ptr frame_info_fn,
586 + png_progressive_frame_ptr frame_end_fn)
587 +{
588 + png_ptr->frame_info_fn = frame_info_fn;
589 + png_ptr->frame_end_fn = frame_end_fn;
590 + png_ptr->apng_flags |= PNG_APNG_APP;
591 +}
592 +#endif
593 +
594 png_voidp PNGAPI
595 png_get_progressive_ptr(png_const_structrp png_ptr)
596 {
597 diff -Naru libpng-1.6.35.org/pngpriv.h libpng-1.6.35/pngpriv.h
598 --- libpng-1.6.35.org/pngpriv.h 2018-07-21 19:16:37.185142931 +0900
599 +++ libpng-1.6.35/pngpriv.h 2018-07-21 19:16:16.226356026 +0900
600 @@ -634,6 +634,10 @@
601 #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000U /* Have another chunk after IDAT */
602 /* 0x4000U (unused) */
603 #define PNG_IS_READ_STRUCT 0x8000U /* Else is a write struct */
604 +#ifdef PNG_APNG_SUPPORTED
605 +#define PNG_HAVE_acTL 0x10000U
606 +#define PNG_HAVE_fcTL 0x20000U
607 +#endif
609 /* Flags for the transformations the PNG library does on the image data */
610 #define PNG_BGR 0x0001U
611 @@ -870,6 +874,16 @@
612 #define png_tRNS PNG_U32(116, 82, 78, 83)
613 #define png_zTXt PNG_U32(122, 84, 88, 116)
615 +#ifdef PNG_APNG_SUPPORTED
616 +#define png_acTL PNG_U32( 97, 99, 84, 76)
617 +#define png_fcTL PNG_U32(102, 99, 84, 76)
618 +#define png_fdAT PNG_U32(102, 100, 65, 84)
619 +
620 +/* For png_struct.apng_flags: */
621 +#define PNG_FIRST_FRAME_HIDDEN 0x0001U
622 +#define PNG_APNG_APP 0x0002U
623 +#endif
624 +
625 /* The following will work on (signed char*) strings, whereas the get_uint_32
626 * macro will fail on top-bit-set values because of the sign extension.
627 */
628 @@ -1641,6 +1655,47 @@
629 */
630 #endif
632 +#ifdef PNG_APNG_SUPPORTED
633 +PNG_INTERNAL_FUNCTION(void,png_ensure_fcTL_is_valid,(png_structp png_ptr,
634 + png_uint_32 width, png_uint_32 height,
635 + png_uint_32 x_offset, png_uint_32 y_offset,
636 + png_uint_16 delay_num, png_uint_16 delay_den,
637 + png_byte dispose_op, png_byte blend_op), PNG_EMPTY);
638 +
639 +#ifdef PNG_READ_APNG_SUPPORTED
640 +PNG_INTERNAL_FUNCTION(void,png_handle_acTL,(png_structp png_ptr, png_infop info_ptr,
641 + png_uint_32 length),PNG_EMPTY);
642 +PNG_INTERNAL_FUNCTION(void,png_handle_fcTL,(png_structp png_ptr, png_infop info_ptr,
643 + png_uint_32 length),PNG_EMPTY);
644 +PNG_INTERNAL_FUNCTION(void,png_handle_fdAT,(png_structp png_ptr, png_infop info_ptr,
645 + png_uint_32 length),PNG_EMPTY);
646 +PNG_INTERNAL_FUNCTION(void,png_have_info,(png_structp png_ptr, png_infop info_ptr),PNG_EMPTY);
647 +PNG_INTERNAL_FUNCTION(void,png_ensure_sequence_number,(png_structp png_ptr,
648 + png_uint_32 length),PNG_EMPTY);
649 +PNG_INTERNAL_FUNCTION(void,png_read_reset,(png_structp png_ptr),PNG_EMPTY);
650 +PNG_INTERNAL_FUNCTION(void,png_read_reinit,(png_structp png_ptr,
651 + png_infop info_ptr),PNG_EMPTY);
652 +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
653 +PNG_INTERNAL_FUNCTION(void,png_progressive_read_reset,(png_structp png_ptr),PNG_EMPTY);
654 +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
655 +#endif /* PNG_READ_APNG_SUPPORTED */
656 +
657 +#ifdef PNG_WRITE_APNG_SUPPORTED
658 +PNG_INTERNAL_FUNCTION(void,png_write_acTL,(png_structp png_ptr,
659 + png_uint_32 num_frames, png_uint_32 num_plays),PNG_EMPTY);
660 +PNG_INTERNAL_FUNCTION(void,png_write_fcTL,(png_structp png_ptr,
661 + png_uint_32 width, png_uint_32 height,
662 + png_uint_32 x_offset, png_uint_32 y_offset,
663 + png_uint_16 delay_num, png_uint_16 delay_den,
664 + png_byte dispose_op, png_byte blend_op),PNG_EMPTY);
665 +PNG_INTERNAL_FUNCTION(void,png_write_fdAT,(png_structp png_ptr,
666 + png_const_bytep data, png_size_t length),PNG_EMPTY);
667 +PNG_INTERNAL_FUNCTION(void,png_write_reset,(png_structp png_ptr),PNG_EMPTY);
668 +PNG_INTERNAL_FUNCTION(void,png_write_reinit,(png_structp png_ptr,
669 + png_infop info_ptr, png_uint_32 width, png_uint_32 height),PNG_EMPTY);
670 +#endif /* PNG_WRITE_APNG_SUPPORTED */
671 +#endif /* PNG_APNG_SUPPORTED */
672 +
673 /* Added at libpng version 1.4.0 */
674 #ifdef PNG_COLORSPACE_SUPPORTED
675 /* These internal functions are for maintaining the colorspace structure within
676 diff -Naru libpng-1.6.35.org/pngread.c libpng-1.6.35/pngread.c
677 --- libpng-1.6.35.org/pngread.c 2018-07-21 19:16:37.186143016 +0900
678 +++ libpng-1.6.35/pngread.c 2018-07-21 19:16:16.224355855 +0900
679 @@ -161,6 +161,9 @@
681 else if (chunk_name == png_IDAT)
682 {
683 +#ifdef PNG_READ_APNG_SUPPORTED
684 + png_have_info(png_ptr, info_ptr);
685 +#endif
686 png_ptr->idat_size = length;
687 break;
688 }
689 @@ -255,6 +258,17 @@
690 png_handle_iTXt(png_ptr, info_ptr, length);
691 #endif
693 +#ifdef PNG_READ_APNG_SUPPORTED
694 + else if (chunk_name == png_acTL)
695 + png_handle_acTL(png_ptr, info_ptr, length);
696 +
697 + else if (chunk_name == png_fcTL)
698 + png_handle_fcTL(png_ptr, info_ptr, length);
699 +
700 + else if (chunk_name == png_fdAT)
701 + png_handle_fdAT(png_ptr, info_ptr, length);
702 +#endif
703 +
704 else
705 png_handle_unknown(png_ptr, info_ptr, length,
706 PNG_HANDLE_CHUNK_AS_DEFAULT);
707 @@ -262,6 +276,72 @@
708 }
709 #endif /* SEQUENTIAL_READ */
711 +#ifdef PNG_READ_APNG_SUPPORTED
712 +void PNGAPI
713 +png_read_frame_head(png_structp png_ptr, png_infop info_ptr)
714 +{
715 + png_byte have_chunk_after_DAT; /* after IDAT or after fdAT */
716 +
717 + png_debug(0, "Reading frame head");
718 +
719 + if (!(png_ptr->mode & PNG_HAVE_acTL))
720 + png_error(png_ptr, "attempt to png_read_frame_head() but "
721 + "no acTL present");
722 +
723 + /* do nothing for the main IDAT */
724 + if (png_ptr->num_frames_read == 0)
725 + return;
726 +
727 + png_read_reset(png_ptr);
728 + png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
729 + png_ptr->mode &= ~PNG_HAVE_fcTL;
730 +
731 + have_chunk_after_DAT = 0;
732 + for (;;)
733 + {
734 + png_uint_32 length = png_read_chunk_header(png_ptr);
735 +
736 + if (png_ptr->chunk_name == png_IDAT)
737 + {
738 + /* discard trailing IDATs for the first frame */
739 + if (have_chunk_after_DAT || png_ptr->num_frames_read > 1)
740 + png_error(png_ptr, "png_read_frame_head(): out of place IDAT");
741 + png_crc_finish(png_ptr, length);
742 + }
743 +
744 + else if (png_ptr->chunk_name == png_fcTL)
745 + {
746 + png_handle_fcTL(png_ptr, info_ptr, length);
747 + have_chunk_after_DAT = 1;
748 + }
749 +
750 + else if (png_ptr->chunk_name == png_fdAT)
751 + {
752 + png_ensure_sequence_number(png_ptr, length);
753 +
754 + /* discard trailing fdATs for frames other than the first */
755 + if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1)
756 + png_crc_finish(png_ptr, length - 4);
757 + else if(png_ptr->mode & PNG_HAVE_fcTL)
758 + {
759 + png_ptr->idat_size = length - 4;
760 + png_ptr->mode |= PNG_HAVE_IDAT;
761 +
762 + break;
763 + }
764 + else
765 + png_error(png_ptr, "png_read_frame_head(): out of place fdAT");
766 + }
767 + else
768 + {
769 + png_warning(png_ptr, "Skipped (ignored) a chunk "
770 + "between APNG chunks");
771 + png_crc_finish(png_ptr, length);
772 + }
773 + }
774 +}
775 +#endif /* PNG_READ_APNG_SUPPORTED */
776 +
777 /* Optional call to update the users info_ptr structure */
778 void PNGAPI
779 png_read_update_info(png_structrp png_ptr, png_inforp info_ptr)
780 diff -Naru libpng-1.6.35.org/pngrutil.c libpng-1.6.35/pngrutil.c
781 --- libpng-1.6.35.org/pngrutil.c 2018-07-21 19:16:37.187143101 +0900
782 +++ libpng-1.6.35/pngrutil.c 2018-07-21 19:16:16.220355514 +0900
783 @@ -865,6 +865,11 @@
784 filter_type = buf[11];
785 interlace_type = buf[12];
787 +#ifdef PNG_READ_APNG_SUPPORTED
788 + png_ptr->first_frame_width = width;
789 + png_ptr->first_frame_height = height;
790 +#endif
791 +
792 /* Set internal variables */
793 png_ptr->width = width;
794 png_ptr->height = height;
795 @@ -2858,6 +2863,179 @@
796 }
797 #endif
799 +#ifdef PNG_READ_APNG_SUPPORTED
800 +void /* PRIVATE */
801 +png_handle_acTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
802 +{
803 + png_byte data[8];
804 + png_uint_32 num_frames;
805 + png_uint_32 num_plays;
806 + png_uint_32 didSet;
807 +
808 + png_debug(1, "in png_handle_acTL");
809 +
810 + if (!(png_ptr->mode & PNG_HAVE_IHDR))
811 + {
812 + png_error(png_ptr, "Missing IHDR before acTL");
813 + }
814 + else if (png_ptr->mode & PNG_HAVE_IDAT)
815 + {
816 + png_warning(png_ptr, "Invalid acTL after IDAT skipped");
817 + png_crc_finish(png_ptr, length);
818 + return;
819 + }
820 + else if (png_ptr->mode & PNG_HAVE_acTL)
821 + {
822 + png_warning(png_ptr, "Duplicate acTL skipped");
823 + png_crc_finish(png_ptr, length);
824 + return;
825 + }
826 + else if (length != 8)
827 + {
828 + png_warning(png_ptr, "acTL with invalid length skipped");
829 + png_crc_finish(png_ptr, length);
830 + return;
831 + }
832 +
833 + png_crc_read(png_ptr, data, 8);
834 + png_crc_finish(png_ptr, 0);
835 +
836 + num_frames = png_get_uint_31(png_ptr, data);
837 + num_plays = png_get_uint_31(png_ptr, data + 4);
838 +
839 + /* the set function will do error checking on num_frames */
840 + didSet = png_set_acTL(png_ptr, info_ptr, num_frames, num_plays);
841 + if(didSet)
842 + png_ptr->mode |= PNG_HAVE_acTL;
843 +}
844 +
845 +void /* PRIVATE */
846 +png_handle_fcTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
847 +{
848 + png_byte data[22];
849 + png_uint_32 width;
850 + png_uint_32 height;
851 + png_uint_32 x_offset;
852 + png_uint_32 y_offset;
853 + png_uint_16 delay_num;
854 + png_uint_16 delay_den;
855 + png_byte dispose_op;
856 + png_byte blend_op;
857 +
858 + png_debug(1, "in png_handle_fcTL");
859 +
860 + png_ensure_sequence_number(png_ptr, length);
861 +
862 + if (!(png_ptr->mode & PNG_HAVE_IHDR))
863 + {
864 + png_error(png_ptr, "Missing IHDR before fcTL");
865 + }
866 + else if (png_ptr->mode & PNG_HAVE_IDAT)
867 + {
868 + /* for any frames other then the first this message may be misleading,
869 + * but correct. PNG_HAVE_IDAT is unset before the frame head is read
870 + * i can't think of a better message */
871 + png_warning(png_ptr, "Invalid fcTL after IDAT skipped");
872 + png_crc_finish(png_ptr, length-4);
873 + return;
874 + }
875 + else if (png_ptr->mode & PNG_HAVE_fcTL)
876 + {
877 + png_warning(png_ptr, "Duplicate fcTL within one frame skipped");
878 + png_crc_finish(png_ptr, length-4);
879 + return;
880 + }
881 + else if (length != 26)
882 + {
883 + png_warning(png_ptr, "fcTL with invalid length skipped");
884 + png_crc_finish(png_ptr, length-4);
885 + return;
886 + }
887 +
888 + png_crc_read(png_ptr, data, 22);
889 + png_crc_finish(png_ptr, 0);
890 +
891 + width = png_get_uint_31(png_ptr, data);
892 + height = png_get_uint_31(png_ptr, data + 4);
893 + x_offset = png_get_uint_31(png_ptr, data + 8);
894 + y_offset = png_get_uint_31(png_ptr, data + 12);
895 + delay_num = png_get_uint_16(data + 16);
896 + delay_den = png_get_uint_16(data + 18);
897 + dispose_op = data[20];
898 + blend_op = data[21];
899 +
900 + if (png_ptr->num_frames_read == 0 && (x_offset != 0 || y_offset != 0))
901 + {
902 + png_warning(png_ptr, "fcTL for the first frame must have zero offset");
903 + return;
904 + }
905 +
906 + if (info_ptr != NULL)
907 + {
908 + if (png_ptr->num_frames_read == 0 &&
909 + (width != info_ptr->width || height != info_ptr->height))
910 + {
911 + png_warning(png_ptr, "size in first frame's fcTL must match "
912 + "the size in IHDR");
913 + return;
914 + }
915 +
916 + /* The set function will do more error checking */
917 + png_set_next_frame_fcTL(png_ptr, info_ptr, width, height,
918 + x_offset, y_offset, delay_num, delay_den,
919 + dispose_op, blend_op);
920 +
921 + png_read_reinit(png_ptr, info_ptr);
922 +
923 + png_ptr->mode |= PNG_HAVE_fcTL;
924 + }
925 +}
926 +
927 +void /* PRIVATE */
928 +png_have_info(png_structp png_ptr, png_infop info_ptr)
929 +{
930 + if((info_ptr->valid & PNG_INFO_acTL) && !(info_ptr->valid & PNG_INFO_fcTL))
931 + {
932 + png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
933 + info_ptr->num_frames++;
934 + }
935 +}
936 +
937 +void /* PRIVATE */
938 +png_handle_fdAT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
939 +{
940 + png_ensure_sequence_number(png_ptr, length);
941 +
942 + /* This function is only called from png_read_end(), png_read_info(),
943 + * and png_push_read_chunk() which means that:
944 + * - the user doesn't want to read this frame
945 + * - or this is an out-of-place fdAT
946 + * in either case it is safe to ignore the chunk with a warning */
947 + png_warning(png_ptr, "ignoring fdAT chunk");
948 + png_crc_finish(png_ptr, length - 4);
949 + PNG_UNUSED(info_ptr)
950 +}
951 +
952 +void /* PRIVATE */
953 +png_ensure_sequence_number(png_structp png_ptr, png_uint_32 length)
954 +{
955 + png_byte data[4];
956 + png_uint_32 sequence_number;
957 +
958 + if (length < 4)
959 + png_error(png_ptr, "invalid fcTL or fdAT chunk found");
960 +
961 + png_crc_read(png_ptr, data, 4);
962 + sequence_number = png_get_uint_31(png_ptr, data);
963 +
964 + if (sequence_number != png_ptr->next_seq_num)
965 + png_error(png_ptr, "fcTL or fdAT chunk with out-of-order sequence "
966 + "number found");
967 +
968 + png_ptr->next_seq_num++;
969 +}
970 +#endif /* PNG_READ_APNG_SUPPORTED */
971 +
972 #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
973 /* Utility function for png_handle_unknown; set up png_ptr::unknown_chunk */
974 static int
975 @@ -4166,7 +4344,38 @@
976 {
977 uInt avail_in;
978 png_bytep buffer;
979 +#ifdef PNG_READ_APNG_SUPPORTED
980 + png_uint_32 bytes_to_skip = 0;
981 +
982 + while (png_ptr->idat_size == 0 || bytes_to_skip != 0)
983 + {
984 + png_crc_finish(png_ptr, bytes_to_skip);
985 + bytes_to_skip = 0;
987 + png_ptr->idat_size = png_read_chunk_header(png_ptr);
988 + if (png_ptr->num_frames_read == 0)
989 + {
990 + if (png_ptr->chunk_name != png_IDAT)
991 + png_error(png_ptr, "Not enough image data");
992 + }
993 + else
994 + {
995 + if (png_ptr->chunk_name == png_IEND)
996 + png_error(png_ptr, "Not enough image data");
997 + if (png_ptr->chunk_name != png_fdAT)
998 + {
999 + png_warning(png_ptr, "Skipped (ignored) a chunk "
1000 + "between APNG chunks");
1001 + bytes_to_skip = png_ptr->idat_size;
1002 + continue;
1003 + }
1004 +
1005 + png_ensure_sequence_number(png_ptr, png_ptr->idat_size);
1006 +
1007 + png_ptr->idat_size -= 4;
1008 + }
1009 + }
1010 +#else
1011 while (png_ptr->idat_size == 0)
1012 {
1013 png_crc_finish(png_ptr, 0);
1014 @@ -4178,7 +4387,7 @@
1015 if (png_ptr->chunk_name != png_IDAT)
1016 png_error(png_ptr, "Not enough image data");
1017 }
1018 -
1019 +#endif /* PNG_READ_APNG_SUPPORTED */
1020 avail_in = png_ptr->IDAT_read_size;
1022 if (avail_in > png_ptr->idat_size)
1023 @@ -4241,6 +4450,9 @@
1025 png_ptr->mode |= PNG_AFTER_IDAT;
1026 png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED;
1027 +#ifdef PNG_READ_APNG_SUPPORTED
1028 + png_ptr->num_frames_read++;
1029 +#endif
1031 if (png_ptr->zstream.avail_in > 0 || png_ptr->idat_size > 0)
1032 png_chunk_benign_error(png_ptr, "Extra compressed data");
1033 @@ -4679,4 +4891,80 @@
1035 png_ptr->flags |= PNG_FLAG_ROW_INIT;
1036 }
1037 +
1038 +#ifdef PNG_READ_APNG_SUPPORTED
1039 +/* This function is to be called after the main IDAT set has been read and
1040 + * before a new IDAT is read. It resets some parts of png_ptr
1041 + * to make them usable by the read functions again */
1042 +void /* PRIVATE */
1043 +png_read_reset(png_structp png_ptr)
1044 +{
1045 + png_ptr->mode &= ~PNG_HAVE_IDAT;
1046 + png_ptr->mode &= ~PNG_AFTER_IDAT;
1047 + png_ptr->row_number = 0;
1048 + png_ptr->pass = 0;
1049 +}
1050 +
1051 +void /* PRIVATE */
1052 +png_read_reinit(png_structp png_ptr, png_infop info_ptr)
1053 +{
1054 + png_ptr->width = info_ptr->next_frame_width;
1055 + png_ptr->height = info_ptr->next_frame_height;
1056 + png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width);
1057 + png_ptr->info_rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,
1058 + png_ptr->width);
1059 + if (png_ptr->prev_row)
1060 + memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
1061 +}
1062 +
1063 +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
1064 +/* same as png_read_reset() but for the progressive reader */
1065 +void /* PRIVATE */
1066 +png_progressive_read_reset(png_structp png_ptr)
1067 +{
1068 +#ifdef PNG_READ_INTERLACING_SUPPORTED
1069 + /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
1070 +
1071 + /* Start of interlace block */
1072 + const int png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
1073 +
1074 + /* Offset to next interlace block */
1075 + const int png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
1076 +
1077 + /* Start of interlace block in the y direction */
1078 + const int png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
1079 +
1080 + /* Offset to next interlace block in the y direction */
1081 + const int png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
1082 +
1083 + if (png_ptr->interlaced)
1084 + {
1085 + if (!(png_ptr->transformations & PNG_INTERLACE))
1086 + png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
1087 + png_pass_ystart[0]) / png_pass_yinc[0];
1088 + else
1089 + png_ptr->num_rows = png_ptr->height;
1090 +
1091 + png_ptr->iwidth = (png_ptr->width +
1092 + png_pass_inc[png_ptr->pass] - 1 -
1093 + png_pass_start[png_ptr->pass]) /
1094 + png_pass_inc[png_ptr->pass];
1095 + }
1096 + else
1097 +#endif /* PNG_READ_INTERLACING_SUPPORTED */
1098 + {
1099 + png_ptr->num_rows = png_ptr->height;
1100 + png_ptr->iwidth = png_ptr->width;
1101 + }
1102 + png_ptr->flags &= ~PNG_FLAG_ZSTREAM_ENDED;
1103 + if (inflateReset(&(png_ptr->zstream)) != Z_OK)
1104 + png_error(png_ptr, "inflateReset failed");
1105 + png_ptr->zstream.avail_in = 0;
1106 + png_ptr->zstream.next_in = 0;
1107 + png_ptr->zstream.next_out = png_ptr->row_buf;
1108 + png_ptr->zstream.avail_out = (uInt)PNG_ROWBYTES(png_ptr->pixel_depth,
1109 + png_ptr->iwidth) + 1;
1110 +}
1111 +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
1112 +#endif /* PNG_READ_APNG_SUPPORTED */
1113 #endif /* READ */
1114 diff -Naru libpng-1.6.35.org/pngset.c libpng-1.6.35/pngset.c
1115 --- libpng-1.6.35.org/pngset.c 2018-07-21 19:16:37.188143186 +0900
1116 +++ libpng-1.6.35/pngset.c 2018-07-21 19:16:16.256358584 +0900
1117 @@ -288,6 +288,11 @@
1118 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
1120 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
1121 +
1122 +#ifdef PNG_APNG_SUPPORTED
1123 + /* for non-animated png. this may be overwritten from an acTL chunk later */
1124 + info_ptr->num_frames = 1;
1125 +#endif
1126 }
1128 #ifdef PNG_oFFs_SUPPORTED
1129 @@ -1158,6 +1163,147 @@
1130 }
1131 #endif /* sPLT */
1133 +#ifdef PNG_APNG_SUPPORTED
1134 +png_uint_32 PNGAPI
1135 +png_set_acTL(png_structp png_ptr, png_infop info_ptr,
1136 + png_uint_32 num_frames, png_uint_32 num_plays)
1137 +{
1138 + png_debug1(1, "in %s storage function", "acTL");
1139 +
1140 + if (png_ptr == NULL || info_ptr == NULL)
1141 + {
1142 + png_warning(png_ptr,
1143 + "Call to png_set_acTL() with NULL png_ptr "
1144 + "or info_ptr ignored");
1145 + return (0);
1146 + }
1147 + if (num_frames == 0)
1148 + {
1149 + png_warning(png_ptr,
1150 + "Ignoring attempt to set acTL with num_frames zero");
1151 + return (0);
1152 + }
1153 + if (num_frames > PNG_UINT_31_MAX)
1154 + {
1155 + png_warning(png_ptr,
1156 + "Ignoring attempt to set acTL with num_frames > 2^31-1");
1157 + return (0);
1158 + }
1159 + if (num_plays > PNG_UINT_31_MAX)
1160 + {
1161 + png_warning(png_ptr,
1162 + "Ignoring attempt to set acTL with num_plays "
1163 + "> 2^31-1");
1164 + return (0);
1165 + }
1166 +
1167 + info_ptr->num_frames = num_frames;
1168 + info_ptr->num_plays = num_plays;
1169 +
1170 + info_ptr->valid |= PNG_INFO_acTL;
1171 +
1172 + return (1);
1173 +}
1174 +
1175 +/* delay_num and delay_den can hold any 16-bit values including zero */
1176 +png_uint_32 PNGAPI
1177 +png_set_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
1178 + png_uint_32 width, png_uint_32 height,
1179 + png_uint_32 x_offset, png_uint_32 y_offset,
1180 + png_uint_16 delay_num, png_uint_16 delay_den,
1181 + png_byte dispose_op, png_byte blend_op)
1182 +{
1183 + png_debug1(1, "in %s storage function", "fcTL");
1184 +
1185 + if (png_ptr == NULL || info_ptr == NULL)
1186 + {
1187 + png_warning(png_ptr,
1188 + "Call to png_set_fcTL() with NULL png_ptr or info_ptr "
1189 + "ignored");
1190 + return (0);
1191 + }
1192 +
1193 + png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset,
1194 + delay_num, delay_den, dispose_op, blend_op);
1195 +
1196 + if (blend_op == PNG_BLEND_OP_OVER)
1197 + {
1198 + if (!(png_ptr->color_type & PNG_COLOR_MASK_ALPHA) &&
1199 + !(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
1200 + {
1201 + png_warning(png_ptr, "PNG_BLEND_OP_OVER is meaningless "
1202 + "and wasteful for opaque images, ignored");
1203 + blend_op = PNG_BLEND_OP_SOURCE;
1204 + }
1205 + }
1206 +
1207 + info_ptr->next_frame_width = width;
1208 + info_ptr->next_frame_height = height;
1209 + info_ptr->next_frame_x_offset = x_offset;
1210 + info_ptr->next_frame_y_offset = y_offset;
1211 + info_ptr->next_frame_delay_num = delay_num;
1212 + info_ptr->next_frame_delay_den = delay_den;
1213 + info_ptr->next_frame_dispose_op = dispose_op;
1214 + info_ptr->next_frame_blend_op = blend_op;
1215 +
1216 + info_ptr->valid |= PNG_INFO_fcTL;
1217 +
1218 + return (1);
1219 +}
1220 +
1221 +void /* PRIVATE */
1222 +png_ensure_fcTL_is_valid(png_structp png_ptr,
1223 + png_uint_32 width, png_uint_32 height,
1224 + png_uint_32 x_offset, png_uint_32 y_offset,
1225 + png_uint_16 delay_num, png_uint_16 delay_den,
1226 + png_byte dispose_op, png_byte blend_op)
1227 +{
1228 + if (width == 0 || width > PNG_UINT_31_MAX)
1229 + png_error(png_ptr, "invalid width in fcTL (> 2^31-1)");
1230 + if (height == 0 || height > PNG_UINT_31_MAX)
1231 + png_error(png_ptr, "invalid height in fcTL (> 2^31-1)");
1232 + if (x_offset > PNG_UINT_31_MAX)
1233 + png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)");
1234 + if (y_offset > PNG_UINT_31_MAX)
1235 + png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)");
1236 + if (width + x_offset > png_ptr->first_frame_width ||
1237 + height + y_offset > png_ptr->first_frame_height)
1238 + png_error(png_ptr, "dimensions of a frame are greater than"
1239 + "the ones in IHDR");
1240 +
1241 + if (dispose_op != PNG_DISPOSE_OP_NONE &&
1242 + dispose_op != PNG_DISPOSE_OP_BACKGROUND &&
1243 + dispose_op != PNG_DISPOSE_OP_PREVIOUS)
1244 + png_error(png_ptr, "invalid dispose_op in fcTL");
1245 +
1246 + if (blend_op != PNG_BLEND_OP_SOURCE &&
1247 + blend_op != PNG_BLEND_OP_OVER)
1248 + png_error(png_ptr, "invalid blend_op in fcTL");
1249 +
1250 + PNG_UNUSED(delay_num)
1251 + PNG_UNUSED(delay_den)
1252 +}
1253 +
1254 +png_uint_32 PNGAPI
1255 +png_set_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr,
1256 + png_byte is_hidden)
1257 +{
1258 + png_debug(1, "in png_first_frame_is_hidden()");
1259 +
1260 + if (png_ptr == NULL)
1261 + return 0;
1262 +
1263 + if (is_hidden)
1264 + png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
1265 + else
1266 + png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN;
1267 +
1268 + PNG_UNUSED(info_ptr)
1269 +
1270 + return 1;
1271 +}
1272 +#endif /* PNG_APNG_SUPPORTED */
1273 +
1274 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1275 static png_byte
1276 check_location(png_const_structrp png_ptr, int location)
1277 diff -Naru libpng-1.6.35.org/pngstruct.h libpng-1.6.35/pngstruct.h
1278 --- libpng-1.6.35.org/pngstruct.h 2018-07-21 19:16:37.188143186 +0900
1279 +++ libpng-1.6.35/pngstruct.h 2018-07-21 19:16:16.214355003 +0900
1280 @@ -403,6 +403,27 @@
1281 png_byte filter_type;
1282 #endif
1284 +#ifdef PNG_APNG_SUPPORTED
1285 + png_uint_32 apng_flags;
1286 + png_uint_32 next_seq_num; /* next fcTL/fdAT chunk sequence number */
1287 + png_uint_32 first_frame_width;
1288 + png_uint_32 first_frame_height;
1289 +
1290 +#ifdef PNG_READ_APNG_SUPPORTED
1291 + png_uint_32 num_frames_read; /* incremented after all image data of */
1292 + /* a frame is read */
1293 +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
1294 + png_progressive_frame_ptr frame_info_fn; /* frame info read callback */
1295 + png_progressive_frame_ptr frame_end_fn; /* frame data read callback */
1296 +#endif
1297 +#endif
1298 +
1299 +#ifdef PNG_WRITE_APNG_SUPPORTED
1300 + png_uint_32 num_frames_to_write;
1301 + png_uint_32 num_frames_written;
1302 +#endif
1303 +#endif /* PNG_APNG_SUPPORTED */
1304 +
1305 /* New members added in libpng-1.2.0 */
1307 /* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
1308 diff -Naru libpng-1.6.35.org/pngtest.c libpng-1.6.35/pngtest.c
1309 --- libpng-1.6.35.org/pngtest.c 2018-07-21 19:16:37.188143186 +0900
1310 +++ libpng-1.6.35/pngtest.c 2018-07-21 19:16:16.213354917 +0900
1311 @@ -875,6 +875,10 @@
1312 volatile int num_passes;
1313 int pass;
1314 int bit_depth, color_type;
1315 +#ifdef PNG_APNG_SUPPORTED
1316 + png_uint_32 num_frames;
1317 + png_uint_32 num_plays;
1318 +#endif
1320 row_buf = NULL;
1321 error_parameters.file_name = inname;
1322 @@ -1381,6 +1385,22 @@
1323 }
1324 }
1325 #endif
1326 +
1327 +#ifdef PNG_APNG_SUPPORTED
1328 + if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_acTL))
1329 + {
1330 + if (png_get_acTL(read_ptr, read_info_ptr, &num_frames, &num_plays))
1331 + {
1332 + png_byte is_hidden;
1333 + pngtest_debug2("Handling acTL chunks (frames %ld, plays %ld)",
1334 + num_frames, num_plays);
1335 + png_set_acTL(write_ptr, write_info_ptr, num_frames, num_plays);
1336 + is_hidden = png_get_first_frame_is_hidden(read_ptr, read_info_ptr);
1337 + png_set_first_frame_is_hidden(write_ptr, write_info_ptr, is_hidden);
1338 + }
1339 + }
1340 +#endif
1341 +
1342 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1343 {
1344 png_unknown_chunkp unknowns;
1345 @@ -1461,6 +1481,110 @@
1346 t_misc += (t_stop - t_start);
1347 t_start = t_stop;
1348 #endif
1349 +#ifdef PNG_APNG_SUPPORTED
1350 + if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_acTL))
1351 + {
1352 + png_uint_32 frame;
1353 + for (frame = 0; frame < num_frames; frame++)
1354 + {
1355 + png_uint_32 frame_width;
1356 + png_uint_32 frame_height;
1357 + png_uint_32 x_offset;
1358 + png_uint_32 y_offset;
1359 + png_uint_16 delay_num;
1360 + png_uint_16 delay_den;
1361 + png_byte dispose_op;
1362 + png_byte blend_op;
1363 + png_read_frame_head(read_ptr, read_info_ptr);
1364 + if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_fcTL))
1365 + {
1366 + png_get_next_frame_fcTL(read_ptr, read_info_ptr,
1367 + &frame_width, &frame_height,
1368 + &x_offset, &y_offset,
1369 + &delay_num, &delay_den,
1370 + &dispose_op, &blend_op);
1371 + }
1372 + else
1373 + {
1374 + frame_width = width;
1375 + frame_height = height;
1376 + x_offset = 0;
1377 + y_offset = 0;
1378 + delay_num = 1;
1379 + delay_den = 1;
1380 + dispose_op = PNG_DISPOSE_OP_NONE;
1381 + blend_op = PNG_BLEND_OP_SOURCE;
1382 + }
1383 +#ifdef PNG_WRITE_APNG_SUPPORTED
1384 + png_write_frame_head(write_ptr, write_info_ptr, (png_bytepp)&row_buf,
1385 + frame_width, frame_height,
1386 + x_offset, y_offset,
1387 + delay_num, delay_den,
1388 + dispose_op, blend_op);
1389 +#endif
1390 + for (pass = 0; pass < num_passes; pass++)
1391 + {
1392 +# ifdef calc_pass_height
1393 + png_uint_32 pass_height;
1394 +
1395 + if (num_passes == 7) /* interlaced */
1396 + {
1397 + if (PNG_PASS_COLS(frame_width, pass) > 0)
1398 + pass_height = PNG_PASS_ROWS(frame_height, pass);
1399 +
1400 + else
1401 + pass_height = 0;
1402 + }
1403 +
1404 + else /* not interlaced */
1405 + pass_height = frame_height;
1406 +# else
1407 +# define pass_height frame_height
1408 +# endif
1409 +
1410 + pngtest_debug1("Writing row data for pass %d", pass);
1411 + for (y = 0; y < pass_height; y++)
1412 + {
1413 +#ifndef SINGLE_ROWBUF_ALLOC
1414 + pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1415 +
1416 + row_buf = (png_bytep)png_malloc(read_ptr,
1417 + png_get_rowbytes(read_ptr, read_info_ptr));
1418 +
1419 + pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf,
1420 + (unsigned long)png_get_rowbytes(read_ptr, read_info_ptr));
1421 +
1422 +#endif /* !SINGLE_ROWBUF_ALLOC */
1423 + png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1424 +
1425 +#ifdef PNG_WRITE_SUPPORTED
1426 +#ifdef PNGTEST_TIMING
1427 + t_stop = (float)clock();
1428 + t_decode += (t_stop - t_start);
1429 + t_start = t_stop;
1430 +#endif
1431 + png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1432 +#ifdef PNGTEST_TIMING
1433 + t_stop = (float)clock();
1434 + t_encode += (t_stop - t_start);
1435 + t_start = t_stop;
1436 +#endif
1437 +#endif /* PNG_WRITE_SUPPORTED */
1438 +
1439 +#ifndef SINGLE_ROWBUF_ALLOC
1440 + pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1441 + png_free(read_ptr, row_buf);
1442 + row_buf = NULL;
1443 +#endif /* !SINGLE_ROWBUF_ALLOC */
1444 + }
1445 + }
1446 +#ifdef PNG_WRITE_APNG_SUPPORTED
1447 + png_write_frame_tail(write_ptr, write_info_ptr);
1448 +#endif
1449 + }
1450 + }
1451 + else
1452 +#endif
1453 for (pass = 0; pass < num_passes; pass++)
1454 {
1455 # ifdef calc_pass_height
1456 diff -Naru libpng-1.6.35.org/pngwrite.c libpng-1.6.35/pngwrite.c
1457 --- libpng-1.6.35.org/pngwrite.c 2018-07-21 19:16:37.188143186 +0900
1458 +++ libpng-1.6.35/pngwrite.c 2018-07-21 19:16:16.211354747 +0900
1459 @@ -128,6 +128,10 @@
1460 * the application continues writing the PNG. So check the 'invalid'
1461 * flag here too.
1462 */
1463 +#ifdef PNG_WRITE_APNG_SUPPORTED
1464 + if (info_ptr->valid & PNG_INFO_acTL)
1465 + png_write_acTL(png_ptr, info_ptr->num_frames, info_ptr->num_plays);
1466 +#endif
1467 #ifdef PNG_GAMMA_SUPPORTED
1468 # ifdef PNG_WRITE_gAMA_SUPPORTED
1469 if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 &&
1470 @@ -370,6 +374,11 @@
1471 png_benign_error(png_ptr, "Wrote palette index exceeding num_palette");
1472 #endif
1474 +#ifdef PNG_WRITE_APNG_SUPPORTED
1475 + if (png_ptr->num_frames_written != png_ptr->num_frames_to_write)
1476 + png_error(png_ptr, "Not enough frames written");
1477 +#endif
1478 +
1479 /* See if user wants us to write information chunks */
1480 if (info_ptr != NULL)
1481 {
1482 @@ -1461,6 +1470,43 @@
1483 }
1484 #endif
1486 +#ifdef PNG_WRITE_APNG_SUPPORTED
1487 +void PNGAPI
1488 +png_write_frame_head(png_structp png_ptr, png_infop info_ptr,
1489 + png_bytepp row_pointers, png_uint_32 width, png_uint_32 height,
1490 + png_uint_32 x_offset, png_uint_32 y_offset,
1491 + png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
1492 + png_byte blend_op)
1493 +{
1494 + png_debug(1, "in png_write_frame_head");
1495 +
1496 + /* there is a chance this has been set after png_write_info was called,
1497 + * so it would be set but not written. is there a way to be sure? */
1498 + if (!(info_ptr->valid & PNG_INFO_acTL))
1499 + png_error(png_ptr, "png_write_frame_head(): acTL not set");
1500 +
1501 + png_write_reset(png_ptr);
1502 +
1503 + png_write_reinit(png_ptr, info_ptr, width, height);
1504 +
1505 + if ( !(png_ptr->num_frames_written == 0 &&
1506 + (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ) )
1507 + png_write_fcTL(png_ptr, width, height, x_offset, y_offset,
1508 + delay_num, delay_den, dispose_op, blend_op);
1509 +
1510 + PNG_UNUSED(row_pointers)
1511 +}
1512 +
1513 +void PNGAPI
1514 +png_write_frame_tail(png_structp png_ptr, png_infop info_ptr)
1515 +{
1516 + png_debug(1, "in png_write_frame_tail");
1517 +
1518 + png_ptr->num_frames_written++;
1519 +
1520 + PNG_UNUSED(info_ptr)
1521 +}
1522 +#endif /* PNG_WRITE_APNG_SUPPORTED */
1524 #ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
1525 /* Initialize the write structure - general purpose utility. */
1526 diff -Naru libpng-1.6.35.org/pngwutil.c libpng-1.6.35/pngwutil.c
1527 --- libpng-1.6.35.org/pngwutil.c 2018-07-21 19:16:37.189143271 +0900
1528 +++ libpng-1.6.35/pngwutil.c 2018-07-21 19:16:16.303362592 +0900
1529 @@ -821,6 +821,11 @@
1530 /* Write the chunk */
1531 png_write_complete_chunk(png_ptr, png_IHDR, buf, 13);
1533 +#ifdef PNG_WRITE_APNG_SUPPORTED
1534 + png_ptr->first_frame_width = width;
1535 + png_ptr->first_frame_height = height;
1536 +#endif
1537 +
1538 if ((png_ptr->do_filter) == PNG_NO_FILTERS)
1539 {
1540 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
1541 @@ -1002,8 +1007,17 @@
1542 optimize_cmf(data, png_image_size(png_ptr));
1543 #endif
1545 - if (size > 0)
1546 - png_write_complete_chunk(png_ptr, png_IDAT, data, size);
1547 + if (size > 0)
1548 +#ifdef PNG_WRITE_APNG_SUPPORTED
1549 + {
1550 + if (png_ptr->num_frames_written == 0)
1551 +#endif
1552 + png_write_complete_chunk(png_ptr, png_IDAT, data, size);
1553 +#ifdef PNG_WRITE_APNG_SUPPORTED
1554 + else
1555 + png_write_fdAT(png_ptr, data, size);
1556 + }
1557 +#endif /* PNG_WRITE_APNG_SUPPORTED */
1558 png_ptr->mode |= PNG_HAVE_IDAT;
1560 png_ptr->zstream.next_out = data;
1561 @@ -1050,7 +1064,17 @@
1562 #endif
1564 if (size > 0)
1565 +#ifdef PNG_WRITE_APNG_SUPPORTED
1566 + {
1567 + if (png_ptr->num_frames_written == 0)
1568 +#endif
1569 png_write_complete_chunk(png_ptr, png_IDAT, data, size);
1570 +#ifdef PNG_WRITE_APNG_SUPPORTED
1571 + else
1572 + png_write_fdAT(png_ptr, data, size);
1573 + }
1574 +#endif /* PNG_WRITE_APNG_SUPPORTED */
1575 +
1576 png_ptr->zstream.avail_out = 0;
1577 png_ptr->zstream.next_out = NULL;
1578 png_ptr->mode |= PNG_HAVE_IDAT | PNG_AFTER_IDAT;
1579 @@ -1885,6 +1909,82 @@
1580 }
1581 #endif
1583 +#ifdef PNG_WRITE_APNG_SUPPORTED
1584 +void /* PRIVATE */
1585 +png_write_acTL(png_structp png_ptr,
1586 + png_uint_32 num_frames, png_uint_32 num_plays)
1587 +{
1588 + png_byte buf[8];
1589 +
1590 + png_debug(1, "in png_write_acTL");
1591 +
1592 + png_ptr->num_frames_to_write = num_frames;
1593 +
1594 + if (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN)
1595 + num_frames--;
1596 +
1597 + png_save_uint_32(buf, num_frames);
1598 + png_save_uint_32(buf + 4, num_plays);
1599 +
1600 + png_write_complete_chunk(png_ptr, png_acTL, buf, (png_size_t)8);
1601 +}
1602 +
1603 +void /* PRIVATE */
1604 +png_write_fcTL(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
1605 + png_uint_32 x_offset, png_uint_32 y_offset,
1606 + png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
1607 + png_byte blend_op)
1608 +{
1609 + png_byte buf[26];
1610 +
1611 + png_debug(1, "in png_write_fcTL");
1612 +
1613 + if (png_ptr->num_frames_written == 0 && (x_offset != 0 || y_offset != 0))
1614 + png_error(png_ptr, "x and/or y offset for the first frame aren't 0");
1615 + if (png_ptr->num_frames_written == 0 &&
1616 + (width != png_ptr->first_frame_width ||
1617 + height != png_ptr->first_frame_height))
1618 + png_error(png_ptr, "width and/or height in the first frame's fcTL "
1619 + "don't match the ones in IHDR");
1620 +
1621 + /* more error checking */
1622 + png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset,
1623 + delay_num, delay_den, dispose_op, blend_op);
1624 +
1625 + png_save_uint_32(buf, png_ptr->next_seq_num);
1626 + png_save_uint_32(buf + 4, width);
1627 + png_save_uint_32(buf + 8, height);
1628 + png_save_uint_32(buf + 12, x_offset);
1629 + png_save_uint_32(buf + 16, y_offset);
1630 + png_save_uint_16(buf + 20, delay_num);
1631 + png_save_uint_16(buf + 22, delay_den);
1632 + buf[24] = dispose_op;
1633 + buf[25] = blend_op;
1634 +
1635 + png_write_complete_chunk(png_ptr, png_fcTL, buf, (png_size_t)26);
1636 +
1637 + png_ptr->next_seq_num++;
1638 +}
1639 +
1640 +void /* PRIVATE */
1641 +png_write_fdAT(png_structp png_ptr,
1642 + png_const_bytep data, png_size_t length)
1643 +{
1644 + png_byte buf[4];
1645 +
1646 + png_write_chunk_header(png_ptr, png_fdAT, (png_uint_32)(4 + length));
1647 +
1648 + png_save_uint_32(buf, png_ptr->next_seq_num);
1649 + png_write_chunk_data(png_ptr, buf, 4);
1650 +
1651 + png_write_chunk_data(png_ptr, data, length);
1652 +
1653 + png_write_chunk_end(png_ptr);
1654 +
1655 + png_ptr->next_seq_num++;
1656 +}
1657 +#endif /* PNG_WRITE_APNG_SUPPORTED */
1658 +
1659 /* Initializes the row writing capability of libpng */
1660 void /* PRIVATE */
1661 png_write_start_row(png_structrp png_ptr)
1662 @@ -2778,4 +2878,39 @@
1663 }
1664 #endif /* WRITE_FLUSH */
1665 }
1666 +
1667 +#ifdef PNG_WRITE_APNG_SUPPORTED
1668 +void /* PRIVATE */
1669 +png_write_reset(png_structp png_ptr)
1670 +{
1671 + png_ptr->row_number = 0;
1672 + png_ptr->pass = 0;
1673 + png_ptr->mode &= ~PNG_HAVE_IDAT;
1674 +}
1675 +
1676 +void /* PRIVATE */
1677 +png_write_reinit(png_structp png_ptr, png_infop info_ptr,
1678 + png_uint_32 width, png_uint_32 height)
1679 +{
1680 + if (png_ptr->num_frames_written == 0 &&
1681 + (width != png_ptr->first_frame_width ||
1682 + height != png_ptr->first_frame_height))
1683 + png_error(png_ptr, "width and/or height in the first frame's fcTL "
1684 + "don't match the ones in IHDR");
1685 + if (width > png_ptr->first_frame_width ||
1686 + height > png_ptr->first_frame_height)
1687 + png_error(png_ptr, "width and/or height for a frame greater than"
1688 + "the ones in IHDR");
1689 +
1690 + png_set_IHDR(png_ptr, info_ptr, width, height,
1691 + info_ptr->bit_depth, info_ptr->color_type,
1692 + info_ptr->interlace_type, info_ptr->compression_type,
1693 + info_ptr->filter_type);
1694 +
1695 + png_ptr->width = width;
1696 + png_ptr->height = height;
1697 + png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
1698 + png_ptr->usr_width = png_ptr->width;
1699 +}
1700 +#endif /* PNG_WRITE_APNG_SUPPORTED */
1701 #endif /* WRITE */
1702 diff -Naru libpng-1.6.35.org/scripts/symbols.def libpng-1.6.35/scripts/symbols.def
1703 --- libpng-1.6.35.org/scripts/symbols.def 2018-07-21 19:16:37.192143527 +0900
1704 +++ libpng-1.6.35/scripts/symbols.def 2018-07-21 19:16:16.206354321 +0900
1705 @@ -254,3 +254,23 @@
1706 png_set_eXIf @247
1707 png_get_eXIf_1 @248
1708 png_set_eXIf_1 @249
1709 + png_get_acTL @250
1710 + png_set_acTL @251
1711 + png_get_num_frames @252
1712 + png_get_num_plays @253
1713 + png_get_next_frame_fcTL @254
1714 + png_set_next_frame_fcTL @255
1715 + png_get_next_frame_width @256
1716 + png_get_next_frame_height @257
1717 + png_get_next_frame_x_offset @258
1718 + png_get_next_frame_y_offset @259
1719 + png_get_next_frame_delay_num @260
1720 + png_get_next_frame_delay_den @261
1721 + png_get_next_frame_dispose_op @262
1722 + png_get_next_frame_blend_op @263
1723 + png_get_first_frame_is_hidden @264
1724 + png_set_first_frame_is_hidden @265
1725 + png_read_frame_head @266
1726 + png_set_progressive_frame_fn @267
1727 + png_write_frame_head @268
1728 + png_write_frame_tail @269