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pngset.c
Go to the documentation of this file.
1
2 /* pngset.c - storage of image information into info struct
3 *
4 * Last changed in libpng 1.5.1 [February 3, 2011]
5 * Copyright (c) 1998-2011 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
8 *
9 * This code is released under the libpng license.
10 * For conditions of distribution and use, see the disclaimer
11 * and license in png.h
12 *
13 * The functions here are used during reads to store data from the file
14 * into the info struct, and during writes to store application data
15 * into the info struct for writing into the file. This abstracts the
16 * info struct and allows us to change the structure in the future.
17 */
18
19 #include "pngpriv.h"
20
21 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
22
23 #ifdef PNG_bKGD_SUPPORTED
24 void PNGAPI
25 png_set_bKGD(png_structp png_ptr, png_infop info_ptr,
26 png_const_color_16p background)
27 {
28 png_debug1(1, "in %s storage function", "bKGD");
29
30 if (png_ptr == NULL || info_ptr == NULL)
31 return;
32
33 png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
34 info_ptr->valid |= PNG_INFO_bKGD;
35 }
36 #endif
37
38 #ifdef PNG_cHRM_SUPPORTED
39 void PNGFAPI
40 png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
41 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
42 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
43 png_fixed_point blue_x, png_fixed_point blue_y)
44 {
45 png_debug1(1, "in %s storage function", "cHRM fixed");
46
47 if (png_ptr == NULL || info_ptr == NULL)
48 return;
49
50 # ifdef PNG_CHECK_cHRM_SUPPORTED
51 if (png_check_cHRM_fixed(png_ptr,
52 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
53 # endif
54 {
55 info_ptr->x_white = white_x;
56 info_ptr->y_white = white_y;
57 info_ptr->x_red = red_x;
58 info_ptr->y_red = red_y;
59 info_ptr->x_green = green_x;
60 info_ptr->y_green = green_y;
61 info_ptr->x_blue = blue_x;
62 info_ptr->y_blue = blue_y;
63 info_ptr->valid |= PNG_INFO_cHRM;
64 }
65 }
66
67 # ifdef PNG_FLOATING_POINT_SUPPORTED
68 void PNGAPI
69 png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
70 double white_x, double white_y, double red_x, double red_y,
71 double green_x, double green_y, double blue_x, double blue_y)
72 {
73 png_set_cHRM_fixed(png_ptr, info_ptr,
74 png_fixed(png_ptr, white_x, "cHRM White X"),
75 png_fixed(png_ptr, white_y, "cHRM White Y"),
76 png_fixed(png_ptr, red_x, "cHRM Red X"),
77 png_fixed(png_ptr, red_y, "cHRM Red Y"),
78 png_fixed(png_ptr, green_x, "cHRM Green X"),
79 png_fixed(png_ptr, green_y, "cHRM Green Y"),
80 png_fixed(png_ptr, blue_x, "cHRM Blue X"),
81 png_fixed(png_ptr, blue_y, "cHRM Blue Y"));
82 }
83 # endif /* PNG_FLOATING_POINT_SUPPORTED */
84
85 #endif /* PNG_cHRM_SUPPORTED */
86
87 #ifdef PNG_gAMA_SUPPORTED
88 void PNGFAPI
89 png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
90 file_gamma)
91 {
92 png_debug1(1, "in %s storage function", "gAMA");
93
94 if (png_ptr == NULL || info_ptr == NULL)
95 return;
96
97 /* Previously these values were limited, however they must be
98 * wrong, therefore storing them (and setting PNG_INFO_gAMA)
99 * must be wrong too.
100 */
101 if (file_gamma > (png_fixed_point)PNG_UINT_31_MAX)
102 png_warning(png_ptr, "Gamma too large, ignored");
103
104 else if (file_gamma <= 0)
105 png_warning(png_ptr, "Negative or zero gamma ignored");
106
107 else
108 {
109 info_ptr->gamma = file_gamma;
110 info_ptr->valid |= PNG_INFO_gAMA;
111 }
112 }
113
114 # ifdef PNG_FLOATING_POINT_SUPPORTED
115 void PNGAPI
116 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
117 {
118 png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma,
119 "png_set_gAMA"));
120 }
121 # endif
122 #endif
123
124 #ifdef PNG_hIST_SUPPORTED
125 void PNGAPI
126 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist)
127 {
128 int i;
129
130 png_debug1(1, "in %s storage function", "hIST");
131
132 if (png_ptr == NULL || info_ptr == NULL)
133 return;
134
135 if (info_ptr->num_palette == 0 || info_ptr->num_palette
136 > PNG_MAX_PALETTE_LENGTH)
137 {
138 png_warning(png_ptr,
139 "Invalid palette size, hIST allocation skipped");
140
141 return;
142 }
143
144 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
145
146 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
147 * version 1.2.1
148 */
149 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
150 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));
151
152 if (png_ptr->hist == NULL)
153 {
154 png_warning(png_ptr, "Insufficient memory for hIST chunk data");
155 return;
156 }
157
158 for (i = 0; i < info_ptr->num_palette; i++)
159 png_ptr->hist[i] = hist[i];
160
161 info_ptr->hist = png_ptr->hist;
162 info_ptr->valid |= PNG_INFO_hIST;
163 info_ptr->free_me |= PNG_FREE_HIST;
164 }
165 #endif
166
167 void PNGAPI
168 png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
169 png_uint_32 width, png_uint_32 height, int bit_depth,
170 int color_type, int interlace_type, int compression_type,
171 int filter_type)
172 {
173 png_debug1(1, "in %s storage function", "IHDR");
174
175 if (png_ptr == NULL || info_ptr == NULL)
176 return;
177
178 info_ptr->width = width;
179 info_ptr->height = height;
180 info_ptr->bit_depth = (png_byte)bit_depth;
181 info_ptr->color_type = (png_byte)color_type;
182 info_ptr->compression_type = (png_byte)compression_type;
183 info_ptr->filter_type = (png_byte)filter_type;
184 info_ptr->interlace_type = (png_byte)interlace_type;
185
186 png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
187 info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
188 info_ptr->compression_type, info_ptr->filter_type);
189
190 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
191 info_ptr->channels = 1;
192
193 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
194 info_ptr->channels = 3;
195
196 else
197 info_ptr->channels = 1;
198
199 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
200 info_ptr->channels++;
201
202 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
203
204 /* Check for potential overflow */
205 if (width >
206 (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */
207 - 48 /* bigrowbuf hack */
208 - 1 /* filter byte */
209 - 7*8 /* rounding of width to multiple of 8 pixels */
210 - 8) /* extra max_pixel_depth pad */
211 info_ptr->rowbytes = 0;
212 else
213 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
214 }
215
216 #ifdef PNG_oFFs_SUPPORTED
217 void PNGAPI
218 png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
219 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
220 {
221 png_debug1(1, "in %s storage function", "oFFs");
222
223 if (png_ptr == NULL || info_ptr == NULL)
224 return;
225
226 info_ptr->x_offset = offset_x;
227 info_ptr->y_offset = offset_y;
228 info_ptr->offset_unit_type = (png_byte)unit_type;
229 info_ptr->valid |= PNG_INFO_oFFs;
230 }
231 #endif
232
233 #ifdef PNG_pCAL_SUPPORTED
234 void PNGAPI
235 png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
236 png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
237 int nparams, png_const_charp units, png_charpp params)
238 {
239 png_size_t length;
240 int i;
241
242 png_debug1(1, "in %s storage function", "pCAL");
243
244 if (png_ptr == NULL || info_ptr == NULL)
245 return;
246
247 length = png_strlen(purpose) + 1;
248 png_debug1(3, "allocating purpose for info (%lu bytes)",
249 (unsigned long)length);
250
251 /* TODO: validate format of calibration name and unit name */
252
253 /* Check that the type matches the specification. */
254 if (type < 0 || type > 3)
255 png_error(png_ptr, "Invalid pCAL equation type");
256
257 /* Validate params[nparams] */
258 for (i=0; i<nparams; ++i)
259 if (!png_check_fp_string(params[i], png_strlen(params[i])))
260 png_error(png_ptr, "Invalid format for pCAL parameter");
261
262 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
263
264 if (info_ptr->pcal_purpose == NULL)
265 {
266 png_warning(png_ptr, "Insufficient memory for pCAL purpose");
267 return;
268 }
269
270 png_memcpy(info_ptr->pcal_purpose, purpose, length);
271
272 png_debug(3, "storing X0, X1, type, and nparams in info");
273 info_ptr->pcal_X0 = X0;
274 info_ptr->pcal_X1 = X1;
275 info_ptr->pcal_type = (png_byte)type;
276 info_ptr->pcal_nparams = (png_byte)nparams;
277
278 length = png_strlen(units) + 1;
279 png_debug1(3, "allocating units for info (%lu bytes)",
280 (unsigned long)length);
281
282 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
283
284 if (info_ptr->pcal_units == NULL)
285 {
286 png_warning(png_ptr, "Insufficient memory for pCAL units");
287 return;
288 }
289
290 png_memcpy(info_ptr->pcal_units, units, length);
291
292 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
293 (png_size_t)((nparams + 1) * png_sizeof(png_charp)));
294
295 if (info_ptr->pcal_params == NULL)
296 {
297 png_warning(png_ptr, "Insufficient memory for pCAL params");
298 return;
299 }
300
301 png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
302
303 for (i = 0; i < nparams; i++)
304 {
305 length = png_strlen(params[i]) + 1;
306 png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
307 (unsigned long)length);
308
309 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
310
311 if (info_ptr->pcal_params[i] == NULL)
312 {
313 png_warning(png_ptr, "Insufficient memory for pCAL parameter");
314 return;
315 }
316
317 png_memcpy(info_ptr->pcal_params[i], params[i], length);
318 }
319
320 info_ptr->valid |= PNG_INFO_pCAL;
321 info_ptr->free_me |= PNG_FREE_PCAL;
322 }
323 #endif
324
325 #ifdef PNG_sCAL_SUPPORTED
326 void PNGAPI
327 png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
328 int unit, png_const_charp swidth, png_const_charp sheight)
329 {
330 png_size_t lengthw = 0, lengthh = 0;
331
332 png_debug1(1, "in %s storage function", "sCAL");
333
334 if (png_ptr == NULL || info_ptr == NULL)
335 return;
336
337 /* Double check the unit (should never get here with an invalid
338 * unit unless this is an API call.)
339 */
340 if (unit != 1 && unit != 2)
341 png_error(png_ptr, "Invalid sCAL unit");
342
343 if (swidth == NULL || (lengthw = png_strlen(swidth)) <= 0 ||
344 swidth[0] == 45 /*'-'*/ || !png_check_fp_string(swidth, lengthw))
345 png_error(png_ptr, "Invalid sCAL width");
346
347 if (sheight == NULL || (lengthh = png_strlen(sheight)) <= 0 ||
348 sheight[0] == 45 /*'-'*/ || !png_check_fp_string(sheight, lengthh))
349 png_error(png_ptr, "Invalid sCAL height");
350
351 info_ptr->scal_unit = (png_byte)unit;
352
353 ++lengthw;
354
355 png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw);
356
357 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw);
358
359 if (info_ptr->scal_s_width == NULL)
360 {
361 png_warning(png_ptr, "Memory allocation failed while processing sCAL");
362 return;
363 }
364
365 png_memcpy(info_ptr->scal_s_width, swidth, lengthw);
366
367 ++lengthh;
368
369 png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh);
370
371 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh);
372
373 if (info_ptr->scal_s_height == NULL)
374 {
375 png_free (png_ptr, info_ptr->scal_s_width);
376 info_ptr->scal_s_width = NULL;
377
378 png_warning(png_ptr, "Memory allocation failed while processing sCAL");
379 return;
380 }
381
382 png_memcpy(info_ptr->scal_s_height, sheight, lengthh);
383
384 info_ptr->valid |= PNG_INFO_sCAL;
385 info_ptr->free_me |= PNG_FREE_SCAL;
386 }
387
388 # ifdef PNG_FLOATING_POINT_SUPPORTED
389 void PNGAPI
390 png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width,
391 double height)
392 {
393 png_debug1(1, "in %s storage function", "sCAL");
394
395 /* Check the arguments. */
396 if (width <= 0)
397 png_warning(png_ptr, "Invalid sCAL width ignored");
398
399 else if (height <= 0)
400 png_warning(png_ptr, "Invalid sCAL height ignored");
401
402 else
403 {
404 /* Convert 'width' and 'height' to ASCII. */
405 char swidth[PNG_sCAL_MAX_DIGITS+1];
406 char sheight[PNG_sCAL_MAX_DIGITS+1];
407
408 png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width,
409 PNG_sCAL_PRECISION);
410 png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height,
411 PNG_sCAL_PRECISION);
412
413 png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
414 }
415 }
416 # endif
417
418 # ifdef PNG_FIXED_POINT_SUPPORTED
419 void PNGAPI
420 png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit,
421 png_fixed_point width, png_fixed_point height)
422 {
423 png_debug1(1, "in %s storage function", "sCAL");
424
425 /* Check the arguments. */
426 if (width <= 0)
427 png_warning(png_ptr, "Invalid sCAL width ignored");
428
429 else if (height <= 0)
430 png_warning(png_ptr, "Invalid sCAL height ignored");
431
432 else
433 {
434 /* Convert 'width' and 'height' to ASCII. */
435 char swidth[PNG_sCAL_MAX_DIGITS+1];
436 char sheight[PNG_sCAL_MAX_DIGITS+1];
437
438 png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width);
439 png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height);
440
441 png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
442 }
443 }
444 # endif
445 #endif
446
447 #ifdef PNG_pHYs_SUPPORTED
448 void PNGAPI
449 png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
450 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
451 {
452 png_debug1(1, "in %s storage function", "pHYs");
453
454 if (png_ptr == NULL || info_ptr == NULL)
455 return;
456
457 info_ptr->x_pixels_per_unit = res_x;
458 info_ptr->y_pixels_per_unit = res_y;
459 info_ptr->phys_unit_type = (png_byte)unit_type;
460 info_ptr->valid |= PNG_INFO_pHYs;
461 }
462 #endif
463
464 void PNGAPI
465 png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
466 png_const_colorp palette, int num_palette)
467 {
468
469 png_debug1(1, "in %s storage function", "PLTE");
470
471 if (png_ptr == NULL || info_ptr == NULL)
472 return;
473
474 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
475 {
476 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
477 png_error(png_ptr, "Invalid palette length");
478
479 else
480 {
481 png_warning(png_ptr, "Invalid palette length");
482 return;
483 }
484 }
485
486 /* It may not actually be necessary to set png_ptr->palette here;
487 * we do it for backward compatibility with the way the png_handle_tRNS
488 * function used to do the allocation.
489 */
490 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
491
492 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
493 * of num_palette entries, in case of an invalid PNG file that has
494 * too-large sample values.
495 */
496 png_ptr->palette = (png_colorp)png_calloc(png_ptr,
497 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
498
499 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
500 info_ptr->palette = png_ptr->palette;
501 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
502
503 info_ptr->free_me |= PNG_FREE_PLTE;
504
505 info_ptr->valid |= PNG_INFO_PLTE;
506 }
507
508 #ifdef PNG_sBIT_SUPPORTED
509 void PNGAPI
510 png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
511 png_const_color_8p sig_bit)
512 {
513 png_debug1(1, "in %s storage function", "sBIT");
514
515 if (png_ptr == NULL || info_ptr == NULL)
516 return;
517
518 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
519 info_ptr->valid |= PNG_INFO_sBIT;
520 }
521 #endif
522
523 #ifdef PNG_sRGB_SUPPORTED
524 void PNGAPI
525 png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent)
526 {
527 png_debug1(1, "in %s storage function", "sRGB");
528
529 if (png_ptr == NULL || info_ptr == NULL)
530 return;
531
532 info_ptr->srgb_intent = (png_byte)srgb_intent;
533 info_ptr->valid |= PNG_INFO_sRGB;
534 }
535
536 void PNGAPI
537 png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
538 int srgb_intent)
539 {
540 png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
541
542 if (png_ptr == NULL || info_ptr == NULL)
543 return;
544
545 png_set_sRGB(png_ptr, info_ptr, srgb_intent);
546
547 # ifdef PNG_gAMA_SUPPORTED
548 png_set_gAMA_fixed(png_ptr, info_ptr, 45455L);
549 # endif
550
551 # ifdef PNG_cHRM_SUPPORTED
552 png_set_cHRM_fixed(png_ptr, info_ptr,
553 /* color x y */
554 /* white */ 31270L, 32900L,
555 /* red */ 64000L, 33000L,
556 /* green */ 30000L, 60000L,
557 /* blue */ 15000L, 6000L
558 );
559 # endif /* cHRM */
560 }
561 #endif /* sRGB */
562
563
564 #ifdef PNG_iCCP_SUPPORTED
565 void PNGAPI
566 png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
567 png_const_charp name, int compression_type,
568 png_const_bytep profile, png_uint_32 proflen)
569 {
570 png_charp new_iccp_name;
571 png_bytep new_iccp_profile;
572 png_uint_32 length;
573
574 png_debug1(1, "in %s storage function", "iCCP");
575
576 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
577 return;
578
579 length = png_strlen(name)+1;
580 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
581
582 if (new_iccp_name == NULL)
583 {
584 png_warning(png_ptr, "Insufficient memory to process iCCP chunk");
585 return;
586 }
587
588 png_memcpy(new_iccp_name, name, length);
589 new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen);
590
591 if (new_iccp_profile == NULL)
592 {
593 png_free (png_ptr, new_iccp_name);
594 png_warning(png_ptr,
595 "Insufficient memory to process iCCP profile");
596 return;
597 }
598
599 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
600
601 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
602
603 info_ptr->iccp_proflen = proflen;
604 info_ptr->iccp_name = new_iccp_name;
605 info_ptr->iccp_profile = new_iccp_profile;
606 /* Compression is always zero but is here so the API and info structure
607 * does not have to change if we introduce multiple compression types
608 */
609 info_ptr->iccp_compression = (png_byte)compression_type;
610 info_ptr->free_me |= PNG_FREE_ICCP;
611 info_ptr->valid |= PNG_INFO_iCCP;
612 }
613 #endif
614
615 #ifdef PNG_TEXT_SUPPORTED
616 void PNGAPI
617 png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr,
618 int num_text)
619 {
620 int ret;
621 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
622
623 if (ret)
624 png_error(png_ptr, "Insufficient memory to store text");
625 }
626
627 int /* PRIVATE */
628 png_set_text_2(png_structp png_ptr, png_infop info_ptr,
629 png_const_textp text_ptr, int num_text)
630 {
631 int i;
632
633 png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
634 png_ptr->chunk_name[0] == '\0') ?
635 "text" : (png_const_charp)png_ptr->chunk_name));
636
637 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
638 return(0);
639
640 /* Make sure we have enough space in the "text" array in info_struct
641 * to hold all of the incoming text_ptr objects.
642 */
643 if (info_ptr->num_text + num_text > info_ptr->max_text)
644 {
645 if (info_ptr->text != NULL)
646 {
647 png_textp old_text;
648 int old_max;
649
650 old_max = info_ptr->max_text;
651 info_ptr->max_text = info_ptr->num_text + num_text + 8;
652 old_text = info_ptr->text;
653 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
654 (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
655
656 if (info_ptr->text == NULL)
657 {
658 png_free(png_ptr, old_text);
659 return(1);
660 }
661
662 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
663 png_sizeof(png_text)));
664 png_free(png_ptr, old_text);
665 }
666
667 else
668 {
669 info_ptr->max_text = num_text + 8;
670 info_ptr->num_text = 0;
671 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
672 (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
673 if (info_ptr->text == NULL)
674 return(1);
675 info_ptr->free_me |= PNG_FREE_TEXT;
676 }
677
678 png_debug1(3, "allocated %d entries for info_ptr->text",
679 info_ptr->max_text);
680 }
681 for (i = 0; i < num_text; i++)
682 {
683 png_size_t text_length, key_len;
684 png_size_t lang_len, lang_key_len;
685 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
686
687 if (text_ptr[i].key == NULL)
688 continue;
689
690 if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
691 text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
692 {
693 png_warning(png_ptr, "text compression mode is out of range");
694 continue;
695 }
696
697 key_len = png_strlen(text_ptr[i].key);
698
699 if (text_ptr[i].compression <= 0)
700 {
701 lang_len = 0;
702 lang_key_len = 0;
703 }
704
705 else
706 # ifdef PNG_iTXt_SUPPORTED
707 {
708 /* Set iTXt data */
709
710 if (text_ptr[i].lang != NULL)
711 lang_len = png_strlen(text_ptr[i].lang);
712
713 else
714 lang_len = 0;
715
716 if (text_ptr[i].lang_key != NULL)
717 lang_key_len = png_strlen(text_ptr[i].lang_key);
718
719 else
720 lang_key_len = 0;
721 }
722 # else /* PNG_iTXt_SUPPORTED */
723 {
724 png_warning(png_ptr, "iTXt chunk not supported");
725 continue;
726 }
727 # endif
728
729 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
730 {
731 text_length = 0;
732 # ifdef PNG_iTXt_SUPPORTED
733 if (text_ptr[i].compression > 0)
734 textp->compression = PNG_ITXT_COMPRESSION_NONE;
735
736 else
737 # endif
738 textp->compression = PNG_TEXT_COMPRESSION_NONE;
739 }
740
741 else
742 {
743 text_length = png_strlen(text_ptr[i].text);
744 textp->compression = text_ptr[i].compression;
745 }
746
747 textp->key = (png_charp)png_malloc_warn(png_ptr,
748 (png_size_t)
749 (key_len + text_length + lang_len + lang_key_len + 4));
750
751 if (textp->key == NULL)
752 return(1);
753
754 png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
755 (unsigned long)(png_uint_32)
756 (key_len + lang_len + lang_key_len + text_length + 4),
757 textp->key);
758
759 png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
760 *(textp->key + key_len) = '\0';
761
762 if (text_ptr[i].compression > 0)
763 {
764 textp->lang = textp->key + key_len + 1;
765 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
766 *(textp->lang + lang_len) = '\0';
767 textp->lang_key = textp->lang + lang_len + 1;
768 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
769 *(textp->lang_key + lang_key_len) = '\0';
770 textp->text = textp->lang_key + lang_key_len + 1;
771 }
772
773 else
774 {
775 textp->lang=NULL;
776 textp->lang_key=NULL;
777 textp->text = textp->key + key_len + 1;
778 }
779
780 if (text_length)
781 png_memcpy(textp->text, text_ptr[i].text,
782 (png_size_t)(text_length));
783
784 *(textp->text + text_length) = '\0';
785
786 # ifdef PNG_iTXt_SUPPORTED
787 if (textp->compression > 0)
788 {
789 textp->text_length = 0;
790 textp->itxt_length = text_length;
791 }
792
793 else
794 # endif
795 {
796 textp->text_length = text_length;
797 textp->itxt_length = 0;
798 }
799
800 info_ptr->num_text++;
801 png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
802 }
803 return(0);
804 }
805 #endif
806
807 #ifdef PNG_tIME_SUPPORTED
808 void PNGAPI
809 png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
810 {
811 png_debug1(1, "in %s storage function", "tIME");
812
813 if (png_ptr == NULL || info_ptr == NULL ||
814 (png_ptr->mode & PNG_WROTE_tIME))
815 return;
816
817 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
818 info_ptr->valid |= PNG_INFO_tIME;
819 }
820 #endif
821
822 #ifdef PNG_tRNS_SUPPORTED
823 void PNGAPI
824 png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
825 png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
826 {
827 png_debug1(1, "in %s storage function", "tRNS");
828
829 if (png_ptr == NULL || info_ptr == NULL)
830 return;
831
832 if (trans_alpha != NULL)
833 {
834 /* It may not actually be necessary to set png_ptr->trans_alpha here;
835 * we do it for backward compatibility with the way the png_handle_tRNS
836 * function used to do the allocation.
837 */
838
839 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
840
841 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
842 png_ptr->trans_alpha = info_ptr->trans_alpha =
843 (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH);
844
845 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
846 png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
847 }
848
849 if (trans_color != NULL)
850 {
851 int sample_max = (1 << info_ptr->bit_depth);
852
853 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
854 (int)trans_color->gray > sample_max) ||
855 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
856 ((int)trans_color->red > sample_max ||
857 (int)trans_color->green > sample_max ||
858 (int)trans_color->blue > sample_max)))
859 png_warning(png_ptr,
860 "tRNS chunk has out-of-range samples for bit_depth");
861
862 png_memcpy(&(info_ptr->trans_color), trans_color,
863 png_sizeof(png_color_16));
864
865 if (num_trans == 0)
866 num_trans = 1;
867 }
868
869 info_ptr->num_trans = (png_uint_16)num_trans;
870
871 if (num_trans != 0)
872 {
873 info_ptr->valid |= PNG_INFO_tRNS;
874 info_ptr->free_me |= PNG_FREE_TRNS;
875 }
876 }
877 #endif
878
879 #ifdef PNG_sPLT_SUPPORTED
880 void PNGAPI
881 png_set_sPLT(png_structp png_ptr,
882 png_infop info_ptr, png_const_sPLT_tp entries, int nentries)
883 /*
884 * entries - array of png_sPLT_t structures
885 * to be added to the list of palettes
886 * in the info structure.
887 *
888 * nentries - number of palette structures to be
889 * added.
890 */
891 {
892 png_sPLT_tp np;
893 int i;
894
895 if (png_ptr == NULL || info_ptr == NULL)
896 return;
897
898 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
899 (info_ptr->splt_palettes_num + nentries) *
900 (png_size_t)png_sizeof(png_sPLT_t));
901
902 if (np == NULL)
903 {
904 png_warning(png_ptr, "No memory for sPLT palettes");
905 return;
906 }
907
908 png_memcpy(np, info_ptr->splt_palettes,
909 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
910
911 png_free(png_ptr, info_ptr->splt_palettes);
912 info_ptr->splt_palettes=NULL;
913
914 for (i = 0; i < nentries; i++)
915 {
916 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
917 png_const_sPLT_tp from = entries + i;
918 png_uint_32 length;
919
920 length = png_strlen(from->name) + 1;
921 to->name = (png_charp)png_malloc_warn(png_ptr, (png_size_t)length);
922
923 if (to->name == NULL)
924 {
925 png_warning(png_ptr,
926 "Out of memory while processing sPLT chunk");
927 continue;
928 }
929
930 png_memcpy(to->name, from->name, length);
931 to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
932 (png_size_t)(from->nentries * png_sizeof(png_sPLT_entry)));
933
934 if (to->entries == NULL)
935 {
936 png_warning(png_ptr,
937 "Out of memory while processing sPLT chunk");
938 png_free(png_ptr, to->name);
939 to->name = NULL;
940 continue;
941 }
942
943 png_memcpy(to->entries, from->entries,
944 from->nentries * png_sizeof(png_sPLT_entry));
945
946 to->nentries = from->nentries;
947 to->depth = from->depth;
948 }
949
950 info_ptr->splt_palettes = np;
951 info_ptr->splt_palettes_num += nentries;
952 info_ptr->valid |= PNG_INFO_sPLT;
953 info_ptr->free_me |= PNG_FREE_SPLT;
954 }
955 #endif /* PNG_sPLT_SUPPORTED */
956
957 #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
958 void PNGAPI
959 png_set_unknown_chunks(png_structp png_ptr,
960 png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
961 {
962 png_unknown_chunkp np;
963 int i;
964
965 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
966 return;
967
968 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
969 (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
970 png_sizeof(png_unknown_chunk));
971
972 if (np == NULL)
973 {
974 png_warning(png_ptr,
975 "Out of memory while processing unknown chunk");
976 return;
977 }
978
979 png_memcpy(np, info_ptr->unknown_chunks,
980 (png_size_t)info_ptr->unknown_chunks_num *
981 png_sizeof(png_unknown_chunk));
982
983 png_free(png_ptr, info_ptr->unknown_chunks);
984 info_ptr->unknown_chunks = NULL;
985
986 for (i = 0; i < num_unknowns; i++)
987 {
988 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
989 png_const_unknown_chunkp from = unknowns + i;
990
991 png_memcpy(to->name, from->name, png_sizeof(from->name));
992 to->name[png_sizeof(to->name)-1] = '\0';
993 to->size = from->size;
994
995 /* Note our location in the read or write sequence */
996 to->location = (png_byte)(png_ptr->mode & 0xff);
997
998 if (from->size == 0)
999 to->data=NULL;
1000
1001 else
1002 {
1003 to->data = (png_bytep)png_malloc_warn(png_ptr,
1004 (png_size_t)from->size);
1005
1006 if (to->data == NULL)
1007 {
1008 png_warning(png_ptr,
1009 "Out of memory while processing unknown chunk");
1010 to->size = 0;
1011 }
1012
1013 else
1014 png_memcpy(to->data, from->data, from->size);
1015 }
1016 }
1017
1018 info_ptr->unknown_chunks = np;
1019 info_ptr->unknown_chunks_num += num_unknowns;
1020 info_ptr->free_me |= PNG_FREE_UNKN;
1021 }
1022
1023 void PNGAPI
1024 png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1025 int chunk, int location)
1026 {
1027 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1028 info_ptr->unknown_chunks_num)
1029 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1030 }
1031 #endif
1032
1033
1034 #ifdef PNG_MNG_FEATURES_SUPPORTED
1035 png_uint_32 PNGAPI
1036 png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1037 {
1038 png_debug(1, "in png_permit_mng_features");
1039
1040 if (png_ptr == NULL)
1041 return (png_uint_32)0;
1042
1043 png_ptr->mng_features_permitted =
1044 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1045
1046 return (png_uint_32)png_ptr->mng_features_permitted;
1047 }
1048 #endif
1049
1050 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1051 void PNGAPI
1052 png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep
1053 chunk_list, int num_chunks)
1054 {
1055 png_bytep new_list, p;
1056 int i, old_num_chunks;
1057 if (png_ptr == NULL)
1058 return;
1059
1060 if (num_chunks == 0)
1061 {
1062 if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1063 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1064
1065 else
1066 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1067
1068 if (keep == PNG_HANDLE_CHUNK_ALWAYS)
1069 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1070
1071 else
1072 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1073
1074 return;
1075 }
1076
1077 if (chunk_list == NULL)
1078 return;
1079
1080 old_num_chunks = png_ptr->num_chunk_list;
1081 new_list=(png_bytep)png_malloc(png_ptr,
1082 (png_size_t)(5*(num_chunks + old_num_chunks)));
1083
1084 if (png_ptr->chunk_list != NULL)
1085 {
1086 png_memcpy(new_list, png_ptr->chunk_list,
1087 (png_size_t)(5*old_num_chunks));
1088 png_free(png_ptr, png_ptr->chunk_list);
1089 png_ptr->chunk_list=NULL;
1090 }
1091
1092 png_memcpy(new_list + 5*old_num_chunks, chunk_list,
1093 (png_size_t)(5*num_chunks));
1094
1095 for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
1096 *p=(png_byte)keep;
1097
1098 png_ptr->num_chunk_list = old_num_chunks + num_chunks;
1099 png_ptr->chunk_list = new_list;
1100 png_ptr->free_me |= PNG_FREE_LIST;
1101 }
1102 #endif
1103
1104 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1105 void PNGAPI
1106 png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1107 png_user_chunk_ptr read_user_chunk_fn)
1108 {
1109 png_debug(1, "in png_set_read_user_chunk_fn");
1110
1111 if (png_ptr == NULL)
1112 return;
1113
1114 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1115 png_ptr->user_chunk_ptr = user_chunk_ptr;
1116 }
1117 #endif
1118
1119 #ifdef PNG_INFO_IMAGE_SUPPORTED
1120 void PNGAPI
1121 png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1122 {
1123 png_debug1(1, "in %s storage function", "rows");
1124
1125 if (png_ptr == NULL || info_ptr == NULL)
1126 return;
1127
1128 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1129 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1130
1131 info_ptr->row_pointers = row_pointers;
1132
1133 if (row_pointers)
1134 info_ptr->valid |= PNG_INFO_IDAT;
1135 }
1136 #endif
1137
1138 void PNGAPI
1139 png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
1140 {
1141 if (png_ptr == NULL)
1142 return;
1143
1144 png_free(png_ptr, png_ptr->zbuf);
1145
1146 if (size > ZLIB_IO_MAX)
1147 {
1148 png_warning(png_ptr, "Attempt to set buffer size beyond max ignored");
1149 png_ptr->zbuf_size = ZLIB_IO_MAX;
1150 size = ZLIB_IO_MAX; /* must fit */
1151 }
1152
1153 else
1154 png_ptr->zbuf_size = (uInt)size;
1155
1156 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1157
1158 /* The following ensures a relatively safe failure if this gets called while
1159 * the buffer is actually in use.
1160 */
1161 png_ptr->zstream.next_out = png_ptr->zbuf;
1162 png_ptr->zstream.avail_out = 0;
1163 png_ptr->zstream.avail_in = 0;
1164 }
1165
1166 void PNGAPI
1167 png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1168 {
1169 if (png_ptr && info_ptr)
1170 info_ptr->valid &= ~mask;
1171 }
1172
1173
1174
1175 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
1176 /* This function was added to libpng 1.2.6 */
1177 void PNGAPI
1178 png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1179 png_uint_32 user_height_max)
1180 {
1181 /* Images with dimensions larger than these limits will be
1182 * rejected by png_set_IHDR(). To accept any PNG datastream
1183 * regardless of dimensions, set both limits to 0x7ffffffL.
1184 */
1185 if (png_ptr == NULL)
1186 return;
1187
1188 png_ptr->user_width_max = user_width_max;
1189 png_ptr->user_height_max = user_height_max;
1190 }
1191
1192 /* This function was added to libpng 1.4.0 */
1193 void PNGAPI
1194 png_set_chunk_cache_max (png_structp png_ptr,
1195 png_uint_32 user_chunk_cache_max)
1196 {
1197 if (png_ptr)
1198 png_ptr->user_chunk_cache_max = user_chunk_cache_max;
1199 }
1200
1201 /* This function was added to libpng 1.4.1 */
1202 void PNGAPI
1203 png_set_chunk_malloc_max (png_structp png_ptr,
1204 png_alloc_size_t user_chunk_malloc_max)
1205 {
1206 if (png_ptr)
1207 png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
1208 }
1209 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1210
1211
1212 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
1213 void PNGAPI
1214 png_set_benign_errors(png_structp png_ptr, int allowed)
1215 {
1216 png_debug(1, "in png_set_benign_errors");
1217
1218 if (allowed)
1219 png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
1220
1221 else
1222 png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
1223 }
1224 #endif /* PNG_BENIGN_ERRORS_SUPPORTED */
1225 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
PNG_TEXT_COMPRESSION_LAST
#define PNG_TEXT_COMPRESSION_LAST
Definition: png.h:623
PNG_FREE_TEXT
#define PNG_FREE_TEXT
Definition: png.h:1573
png_set_IHDR
void PNGAPI png_set_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type)
Definition: pngset.c:168
png_set_sCAL_s
void PNGAPI png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, int unit, png_const_charp swidth, png_const_charp sheight)
Definition: pngset.c:327
png_memcpy
#define png_memcpy
Definition: pngpriv.h:226
PNG_ALL_MNG_FEATURES
#define PNG_ALL_MNG_FEATURES
Definition: png.h:875
png_free_data
void PNGAPI png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, int num)
Definition: png.c:247
PNG_INFO_gAMA
#define PNG_INFO_gAMA
Definition: png.h:753
PNG_FREE_HIST
#define PNG_FREE_HIST
Definition: png.h:1563
PNG_INFO_tIME
#define PNG_INFO_tIME
Definition: png.h:762
PNG_INFO_sRGB
#define PNG_INFO_sRGB
Definition: png.h:764
png_set_tIME
void PNGAPI png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
Definition: pngset.c:809
png_const_timep
PNG_CONST png_time FAR * png_const_timep
Definition: png.h:641
png_ascii_from_fp
void png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, double fp, unsigned int precision)
Definition: png.c:1084
PNG_INFO_hIST
#define PNG_INFO_hIST
Definition: png.h:759
PNG_UINT_31_MAX
#define PNG_UINT_31_MAX
Definition: png.h:672
PNG_MAX_PALETTE_LENGTH
#define PNG_MAX_PALETTE_LENGTH
Definition: png.h:746
png_set_rows
void PNGAPI png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
Definition: pngset.c:1121
PNG_sCAL_PRECISION
#define PNG_sCAL_PRECISION
Definition: pnglibconf.h:27
PNG_COLOR_TYPE_RGB
#define PNG_COLOR_TYPE_RGB
Definition: png.h:691
png_charp
char FAR * png_charp
Definition: pngconf.h:572
PNG_COLOR_TYPE_PALETTE
#define PNG_COLOR_TYPE_PALETTE
Definition: png.h:690
png_fixed
png_fixed_point png_fixed(png_structp png_ptr, double fp, png_const_charp text)
Definition: png.c:1459
png_set_unknown_chunks
void PNGAPI png_set_unknown_chunks(png_structp png_ptr, png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
Definition: pngset.c:959
png_set_user_limits
void PNGAPI png_set_user_limits(png_structp png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max)
Definition: pngset.c:1178
PNG_FREE_PLTE
#define PNG_FREE_PLTE
Definition: png.h:1571
png_debug
#define png_debug(l, m)
Definition: pngdebug.h:149
png_set_gAMA_fixed
void PNGFAPI png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point file_gamma)
Definition: pngset.c:89
PNG_FREE_ICCP
#define PNG_FREE_ICCP
Definition: png.h:1564
png_const_colorp
PNG_CONST png_color FAR * png_const_colorp
Definition: png.h:525
png_int_32
long png_int_32
Definition: pngconf.h:481
png_memset
#define png_memset
Definition: pngpriv.h:227
PNG_FLAG_KEEP_UNKNOWN_CHUNKS
#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS
Definition: pngpriv.h:337
png_const_charp
PNG_CONST char FAR * png_const_charp
Definition: pngconf.h:573
png_set_sCAL
void PNGAPI png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, double height)
Definition: pngset.c:390
png_const_color_8p
PNG_CONST png_color_8 FAR * png_const_color_8p
Definition: png.h:549
PNG_INFO_oFFs
#define PNG_INFO_oFFs
Definition: png.h:761
png_set_unknown_chunk_location
void PNGAPI png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, int chunk, int location)
Definition: pngset.c:1024
png_set_gAMA
void PNGAPI png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
Definition: pngset.c:116
png_permit_mng_features
png_uint_32 PNGAPI png_permit_mng_features(png_structp png_ptr, png_uint_32 mng_features)
Definition: pngset.c:1036
png_set_oFFs
void PNGAPI png_set_oFFs(png_structp png_ptr, png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y, int unit_type)
Definition: pngset.c:218
png_textp
png_text FAR * png_textp
Definition: png.h:610
png_alloc_size_t
png_size_t png_alloc_size_t
Definition: pngconf.h:627
png_set_compression_buffer_size
void PNGAPI png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
Definition: pngset.c:1139
png_bytepp
png_byte FAR *FAR * png_bytepp
Definition: pngconf.h:589
png_set_sRGB_gAMA_and_cHRM
void PNGAPI png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, int srgb_intent)
Definition: pngset.c:537
png_unknown_chunk_t
Definition: png.h:651
png_set_bKGD
void PNGAPI png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_const_color_16p background)
Definition: pngset.c:25
png_set_sCAL_fixed
void PNGAPI png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, png_fixed_point width, png_fixed_point height)
Definition: pngset.c:420
png_uint_32
unsigned long png_uint_32
Definition: pngconf.h:480
PNG_TEXT_COMPRESSION_NONE
#define PNG_TEXT_COMPRESSION_NONE
Definition: png.h:619
PNGAPI
#define PNGAPI
Definition: pngconf.h:256
png_check_IHDR
void png_check_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type)
Definition: png.c:745
png_set_sBIT
void PNGAPI png_set_sBIT(png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)
Definition: pngset.c:510
png_structp
png_struct FAR * png_structp
Definition: png.h:797
PNG_FREE_ROWS
#define PNG_FREE_ROWS
Definition: png.h:1566
PNG_HANDLE_CHUNK_ALWAYS
#define PNG_HANDLE_CHUNK_ALWAYS
Definition: png.h:2032
png_const_textp
PNG_CONST png_text FAR * png_const_textp
Definition: png.h:611
PNGFAPI
#define PNGFAPI
Definition: pngpriv.h:131
png_text_struct
Definition: png.h:593
png_set_PLTE
void PNGAPI png_set_PLTE(png_structp png_ptr, png_infop info_ptr, png_const_colorp palette, int num_palette)
Definition: pngset.c:465
PNG_COLOR_MASK_COLOR
#define PNG_COLOR_MASK_COLOR
Definition: png.h:685
PNG_ITXT_COMPRESSION_NONE
#define PNG_ITXT_COMPRESSION_NONE
Definition: png.h:621
png_set_sPLT
void PNGAPI png_set_sPLT(png_structp png_ptr, png_infop info_ptr, png_const_sPLT_tp entries, int nentries)
Definition: pngset.c:881
png_infop
png_info FAR * png_infop
Definition: png.h:667
PNG_FREE_SPLT
#define PNG_FREE_SPLT
Definition: png.h:1565
png_byte
unsigned char png_byte
Definition: pngconf.h:485
png_uint_16
unsigned short png_uint_16
Definition: pngconf.h:483
png_set_cHRM
void PNGAPI png_set_cHRM(png_structp png_ptr, png_infop info_ptr, double white_x, double white_y, double red_x, double red_y, double green_x, double green_y, double blue_x, double blue_y)
Definition: pngset.c:69
png_set_text
void PNGAPI png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, int num_text)
Definition: pngset.c:617
PNG_COLOR_TYPE_GRAY
#define PNG_COLOR_TYPE_GRAY
Definition: png.h:689
png_sPLT_entryp
png_sPLT_entry FAR * png_sPLT_entryp
Definition: png.h:564
png_warning
void PNGAPI png_warning(png_structp png_ptr, png_const_charp warning_message)
Definition: pngerror.c:108
png_check_cHRM_fixed
int png_check_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, png_fixed_point blue_y)
Definition: png.c:671
png_ascii_from_fixed
void png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, png_fixed_point fp)
Definition: png.c:1386
PNG_FREE_LIST
#define PNG_FREE_LIST
Definition: png.h:1570
png_uint_16p
png_uint_16 FAR * png_uint_16p
Definition: pngconf.h:568
png_set_chunk_malloc_max
void PNGAPI png_set_chunk_malloc_max(png_structp png_ptr, png_alloc_size_t user_chunk_malloc_max)
Definition: pngset.c:1203
PNG_UINT_32_MAX
#define PNG_UINT_32_MAX
Definition: png.h:673
PNG_FLAG_BENIGN_ERRORS_WARN
#define PNG_FLAG_BENIGN_ERRORS_WARN
Definition: pngpriv.h:345
png_const_bytep
PNG_CONST png_byte FAR * png_const_bytep
Definition: pngconf.h:563
png_debug1
#define png_debug1(l, m, p1)
Definition: pngdebug.h:152
png_time_struct
Definition: png.h:631
PNG_FREE_UNKN
#define PNG_FREE_UNKN
Definition: png.h:1569
png_color_struct
Definition: png.h:518
png_strlen
#define png_strlen
Definition: pngpriv.h:224
png_set_cHRM_fixed
void PNGFAPI png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, png_fixed_point blue_y)
Definition: pngset.c:40
PNG_INFO_sBIT
#define PNG_INFO_sBIT
Definition: png.h:754
png_sPLT_entry_struct
Definition: png.h:556
png_const_color_16p
PNG_CONST png_color_16 FAR * png_const_color_16p
Definition: png.h:537
png_color_8_struct
Definition: png.h:540
png_set_text_2
int png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, int num_text)
Definition: pngset.c:628
png_const_unknown_chunkp
PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp
Definition: png.h:662
PNG_HANDLE_CHUNK_IF_SAFE
#define PNG_HANDLE_CHUNK_IF_SAFE
Definition: png.h:2031
PNG_INFO_PLTE
#define PNG_INFO_PLTE
Definition: png.h:756
png_bytep
png_byte FAR * png_bytep
Definition: pngconf.h:562
PNG_WROTE_tIME
#define PNG_WROTE_tIME
Definition: pngpriv.h:273
png_set_hIST
void PNGAPI png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist)
Definition: pngset.c:126
keep
int keep(0)
pngpriv.h
png_sPLT_struct
Definition: png.h:573
PNG_COLOR_MASK_ALPHA
#define PNG_COLOR_MASK_ALPHA
Definition: png.h:686
PNG_INFO_IDAT
#define PNG_INFO_IDAT
Definition: png.h:768
png_set_tRNS
void PNGAPI png_set_tRNS(png_structp png_ptr, png_infop info_ptr, png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
Definition: pngset.c:824
PNG_INFO_tRNS
#define PNG_INFO_tRNS
Definition: png.h:757
png_sPLT_tp
png_sPLT_t FAR * png_sPLT_tp
Definition: png.h:580
png_voidp
void FAR * png_voidp
Definition: pngconf.h:560
png_fixed_point
png_int_32 png_fixed_point
Definition: pngconf.h:557
png_charpp
char FAR *FAR * png_charpp
Definition: pngconf.h:595
PNG_FREE_PCAL
#define PNG_FREE_PCAL
Definition: png.h:1567
png_size_t
size_t png_size_t
Definition: pngconf.h:490
png_set_invalid
void PNGAPI png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
Definition: pngset.c:1167
PNG_sCAL_MAX_DIGITS
#define PNG_sCAL_MAX_DIGITS
Definition: pngpriv.h:1091
png_const_sPLT_tp
PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp
Definition: png.h:581
png_set_read_user_chunk_fn
void PNGAPI png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)
Definition: pngset.c:1106
PNG_INFO_sPLT
#define PNG_INFO_sPLT
Definition: png.h:766
png_check_fp_string
int png_check_fp_string(png_const_charp string, png_size_t size)
Definition: png.c:1031
png_unknown_chunkp
png_unknown_chunk FAR * png_unknown_chunkp
Definition: png.h:661
png_set_sRGB
void PNGAPI png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent)
Definition: pngset.c:525
png_set_keep_unknown_chunks
void PNGAPI png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep chunk_list, int num_chunks)
Definition: pngset.c:1052
PNG_FLAG_KEEP_UNSAFE_CHUNKS
#define PNG_FLAG_KEEP_UNSAFE_CHUNKS
Definition: pngpriv.h:338
png_set_pHYs
void PNGAPI png_set_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)
Definition: pngset.c:449
png_set_iCCP
void PNGAPI png_set_iCCP(png_structp png_ptr, png_infop info_ptr, png_const_charp name, int compression_type, png_const_bytep profile, png_uint_32 proflen)
Definition: pngset.c:566
png_free
void PNGAPI png_free(png_structp png_ptr, png_voidp ptr)
Definition: pngmem.c:569
png_color_16_struct
Definition: png.h:528
PNG_INFO_pHYs
#define PNG_INFO_pHYs
Definition: png.h:760
PNG_INFO_pCAL
#define PNG_INFO_pCAL
Definition: png.h:763
PNG_ROWBYTES
#define PNG_ROWBYTES(pixel_bits, width)
Definition: pngpriv.h:382
png_set_pCAL
void PNGAPI png_set_pCAL(png_structp png_ptr, png_infop info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_const_charp units, png_charpp params)
Definition: pngset.c:235
PNG_FREE_SCAL
#define PNG_FREE_SCAL
Definition: png.h:1568
PNG_INFO_cHRM
#define PNG_INFO_cHRM
Definition: png.h:755
png_set_chunk_cache_max
void PNGAPI png_set_chunk_cache_max(png_structp png_ptr, png_uint_32 user_chunk_cache_max)
Definition: pngset.c:1194
PNG_INFO_bKGD
#define PNG_INFO_bKGD
Definition: png.h:758
png_const_uint_16p
PNG_CONST png_uint_16 FAR * png_const_uint_16p
Definition: pngconf.h:569
PNG_INFO_iCCP
#define PNG_INFO_iCCP
Definition: png.h:765
uInt
unsigned int uInt
Definition: zconf.h:335
png_set_benign_errors
void PNGAPI png_set_benign_errors(png_structp png_ptr, int allowed)
Definition: pngset.c:1214
png_sizeof
#define png_sizeof(x)
Definition: pngconf.h:492
PNG_FREE_TRNS
#define PNG_FREE_TRNS
Definition: png.h:1572
PNG_INFO_sCAL
#define PNG_INFO_sCAL
Definition: png.h:767
ZLIB_IO_MAX
#define ZLIB_IO_MAX
Definition: pngpriv.h:372
png_debug2
#define png_debug2(l, m, p1, p2)
Definition: pngdebug.h:155
png_colorp
png_color FAR * png_colorp
Definition: png.h:524