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source: vbox/trunk/src/libs/libpng-1.2.53/pngset.c@ 58639

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libpng 1.2.53 export fix
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1
2/* pngset.c - storage of image information into info struct
3 *
4 * Last changed in libpng 1.2.53 [February 26, 2015]
5 * Copyright (c) 1998-2015 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#define PNG_INTERNAL
20#define PNG_NO_PEDANTIC_WARNINGS
21#include "png.h"
22#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
23
24#ifdef PNG_bKGD_SUPPORTED
25void PNGAPI
26png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_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#ifdef PNG_FLOATING_POINT_SUPPORTED
40void PNGAPI
41png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
42 double white_x, double white_y, double red_x, double red_y,
43 double green_x, double green_y, double blue_x, double blue_y)
44{
45 png_debug1(1, "in %s storage function", "cHRM");
46
47 if (png_ptr == NULL || info_ptr == NULL)
48 return;
49
50 info_ptr->x_white = (float)white_x;
51 info_ptr->y_white = (float)white_y;
52 info_ptr->x_red = (float)red_x;
53 info_ptr->y_red = (float)red_y;
54 info_ptr->x_green = (float)green_x;
55 info_ptr->y_green = (float)green_y;
56 info_ptr->x_blue = (float)blue_x;
57 info_ptr->y_blue = (float)blue_y;
58#ifdef PNG_FIXED_POINT_SUPPORTED
59 info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
60 info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
61 info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
62 info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
63 info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
64 info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
65 info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
66 info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
67#endif
68 info_ptr->valid |= PNG_INFO_cHRM;
69}
70#endif /* PNG_FLOATING_POINT_SUPPORTED */
71
72#ifdef PNG_FIXED_POINT_SUPPORTED
73void PNGAPI
74png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
75 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
76 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
77 png_fixed_point blue_x, png_fixed_point blue_y)
78{
79 png_debug1(1, "in %s storage function", "cHRM fixed");
80
81 if (png_ptr == NULL || info_ptr == NULL)
82 return;
83
84#ifdef PNG_CHECK_cHRM_SUPPORTED
85 if (png_check_cHRM_fixed(png_ptr,
86 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
87#endif
88 {
89 info_ptr->int_x_white = white_x;
90 info_ptr->int_y_white = white_y;
91 info_ptr->int_x_red = red_x;
92 info_ptr->int_y_red = red_y;
93 info_ptr->int_x_green = green_x;
94 info_ptr->int_y_green = green_y;
95 info_ptr->int_x_blue = blue_x;
96 info_ptr->int_y_blue = blue_y;
97#ifdef PNG_FLOATING_POINT_SUPPORTED
98 info_ptr->x_white = (float)(white_x/100000.);
99 info_ptr->y_white = (float)(white_y/100000.);
100 info_ptr->x_red = (float)( red_x/100000.);
101 info_ptr->y_red = (float)( red_y/100000.);
102 info_ptr->x_green = (float)(green_x/100000.);
103 info_ptr->y_green = (float)(green_y/100000.);
104 info_ptr->x_blue = (float)( blue_x/100000.);
105 info_ptr->y_blue = (float)( blue_y/100000.);
106#endif
107 info_ptr->valid |= PNG_INFO_cHRM;
108 }
109}
110#endif /* PNG_FIXED_POINT_SUPPORTED */
111#endif /* PNG_cHRM_SUPPORTED */
112
113#ifdef PNG_gAMA_SUPPORTED
114#ifdef PNG_FLOATING_POINT_SUPPORTED
115void PNGAPI
116png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
117{
118 double png_gamma;
119
120 png_debug1(1, "in %s storage function", "gAMA");
121
122 if (png_ptr == NULL || info_ptr == NULL)
123 return;
124
125 /* Check for overflow */
126 if (file_gamma > 21474.83)
127 {
128 png_warning(png_ptr, "Limiting gamma to 21474.83");
129 png_gamma=21474.83;
130 }
131 else
132 png_gamma = file_gamma;
133 info_ptr->gamma = (float)png_gamma;
134#ifdef PNG_FIXED_POINT_SUPPORTED
135 info_ptr->int_gamma = (int)(png_gamma*100000.+.5);
136#endif
137 info_ptr->valid |= PNG_INFO_gAMA;
138 if (png_gamma == 0.0)
139 png_warning(png_ptr, "Setting gamma=0");
140}
141#endif
142void PNGAPI
143png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
144 int_gamma)
145{
146 png_fixed_point png_gamma;
147
148 png_debug1(1, "in %s storage function", "gAMA");
149
150 if (png_ptr == NULL || info_ptr == NULL)
151 return;
152
153 if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX)
154 {
155 png_warning(png_ptr, "Limiting gamma to 21474.83");
156 png_gamma=PNG_UINT_31_MAX;
157 }
158 else
159 {
160 if (int_gamma < 0)
161 {
162 png_warning(png_ptr, "Setting negative gamma to zero");
163 png_gamma = 0;
164 }
165 else
166 png_gamma = int_gamma;
167 }
168#ifdef PNG_FLOATING_POINT_SUPPORTED
169 info_ptr->gamma = (float)(png_gamma/100000.);
170#endif
171#ifdef PNG_FIXED_POINT_SUPPORTED
172 info_ptr->int_gamma = png_gamma;
173#endif
174 info_ptr->valid |= PNG_INFO_gAMA;
175 if (png_gamma == 0)
176 png_warning(png_ptr, "Setting gamma=0");
177}
178#endif
179
180#ifdef PNG_hIST_SUPPORTED
181void PNGAPI
182png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
183{
184 int i;
185
186 png_debug1(1, "in %s storage function", "hIST");
187
188 if (png_ptr == NULL || info_ptr == NULL)
189 return;
190
191 if (info_ptr->num_palette == 0 || info_ptr->num_palette
192 > PNG_MAX_PALETTE_LENGTH)
193 {
194 png_warning(png_ptr,
195 "Invalid palette size, hIST allocation skipped.");
196 return;
197 }
198
199#ifdef PNG_FREE_ME_SUPPORTED
200 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
201#endif
202 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
203 * version 1.2.1
204 */
205 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
206 (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
207 if (png_ptr->hist == NULL)
208 {
209 png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
210 return;
211 }
212
213 for (i = 0; i < info_ptr->num_palette; i++)
214 png_ptr->hist[i] = hist[i];
215 info_ptr->hist = png_ptr->hist;
216 info_ptr->valid |= PNG_INFO_hIST;
217
218#ifdef PNG_FREE_ME_SUPPORTED
219 info_ptr->free_me |= PNG_FREE_HIST;
220#else
221 png_ptr->flags |= PNG_FLAG_FREE_HIST;
222#endif
223}
224#endif
225
226void PNGAPI
227png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
228 png_uint_32 width, png_uint_32 height, int bit_depth,
229 int color_type, int interlace_type, int compression_type,
230 int filter_type)
231{
232 png_debug1(1, "in %s storage function", "IHDR");
233
234 if (png_ptr == NULL || info_ptr == NULL)
235 return;
236
237 info_ptr->width = width;
238 info_ptr->height = height;
239 info_ptr->bit_depth = (png_byte)bit_depth;
240 info_ptr->color_type = (png_byte)color_type;
241 info_ptr->compression_type = (png_byte)compression_type;
242 info_ptr->filter_type = (png_byte)filter_type;
243 info_ptr->interlace_type = (png_byte)interlace_type;
244
245 png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
246 info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
247 info_ptr->compression_type, info_ptr->filter_type);
248
249 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
250 info_ptr->channels = 1;
251 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
252 info_ptr->channels = 3;
253 else
254 info_ptr->channels = 1;
255 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
256 info_ptr->channels++;
257 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
258
259 /* Check for potential overflow */
260 if (width > (PNG_UINT_32_MAX
261 >> 3) /* 8-byte RGBA pixels */
262 - 64 /* bigrowbuf hack */
263 - 1 /* filter byte */
264 - 7*8 /* rounding of width to multiple of 8 pixels */
265 - 8) /* extra max_pixel_depth pad */
266 {
267 info_ptr->rowbytes = (png_size_t)0;
268 png_error(png_ptr, "Image width is too large for this architecture");
269 }
270 else
271 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
272}
273
274#ifdef PNG_oFFs_SUPPORTED
275void PNGAPI
276png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
277 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
278{
279 png_debug1(1, "in %s storage function", "oFFs");
280
281 if (png_ptr == NULL || info_ptr == NULL)
282 return;
283
284 info_ptr->x_offset = offset_x;
285 info_ptr->y_offset = offset_y;
286 info_ptr->offset_unit_type = (png_byte)unit_type;
287 info_ptr->valid |= PNG_INFO_oFFs;
288}
289#endif
290
291#ifdef PNG_pCAL_SUPPORTED
292void PNGAPI
293png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
294 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
295 png_charp units, png_charpp params)
296{
297 png_uint_32 length;
298 int i;
299
300 png_debug1(1, "in %s storage function", "pCAL");
301
302 if (png_ptr == NULL || info_ptr == NULL)
303 return;
304
305 length = png_strlen(purpose) + 1;
306 png_debug1(3, "allocating purpose for info (%lu bytes)",
307 (unsigned long)length);
308 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
309 if (info_ptr->pcal_purpose == NULL)
310 {
311 png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
312 return;
313 }
314 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
315
316 png_debug(3, "storing X0, X1, type, and nparams in info");
317 info_ptr->pcal_X0 = X0;
318 info_ptr->pcal_X1 = X1;
319 info_ptr->pcal_type = (png_byte)type;
320 info_ptr->pcal_nparams = (png_byte)nparams;
321
322 length = png_strlen(units) + 1;
323 png_debug1(3, "allocating units for info (%lu bytes)",
324 (unsigned long)length);
325 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
326 if (info_ptr->pcal_units == NULL)
327 {
328 png_warning(png_ptr, "Insufficient memory for pCAL units.");
329 return;
330 }
331 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
332
333 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
334 (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
335 if (info_ptr->pcal_params == NULL)
336 {
337 png_warning(png_ptr, "Insufficient memory for pCAL params.");
338 return;
339 }
340
341 png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
342
343 for (i = 0; i < nparams; i++)
344 {
345 length = png_strlen(params[i]) + 1;
346 png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
347 (unsigned long)length);
348 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
349 if (info_ptr->pcal_params[i] == NULL)
350 {
351 png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
352 return;
353 }
354 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
355 }
356
357 info_ptr->valid |= PNG_INFO_pCAL;
358#ifdef PNG_FREE_ME_SUPPORTED
359 info_ptr->free_me |= PNG_FREE_PCAL;
360#endif
361}
362#endif
363
364#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
365#ifdef PNG_FLOATING_POINT_SUPPORTED
366void PNGAPI
367png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
368 int unit, double width, double height)
369{
370 png_debug1(1, "in %s storage function", "sCAL");
371
372 if (png_ptr == NULL || info_ptr == NULL)
373 return;
374
375 info_ptr->scal_unit = (png_byte)unit;
376 info_ptr->scal_pixel_width = width;
377 info_ptr->scal_pixel_height = height;
378
379 info_ptr->valid |= PNG_INFO_sCAL;
380}
381#else
382#ifdef PNG_FIXED_POINT_SUPPORTED
383void PNGAPI
384png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
385 int unit, png_charp swidth, png_charp sheight)
386{
387 png_uint_32 length;
388
389 png_debug1(1, "in %s storage function", "sCAL");
390
391 if (png_ptr == NULL || info_ptr == NULL)
392 return;
393
394 info_ptr->scal_unit = (png_byte)unit;
395
396 length = png_strlen(swidth) + 1;
397 png_debug1(3, "allocating unit for info (%u bytes)",
398 (unsigned int)length);
399 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
400 if (info_ptr->scal_s_width == NULL)
401 {
402 png_warning(png_ptr,
403 "Memory allocation failed while processing sCAL.");
404 return;
405 }
406 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
407
408 length = png_strlen(sheight) + 1;
409 png_debug1(3, "allocating unit for info (%u bytes)",
410 (unsigned int)length);
411 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
412 if (info_ptr->scal_s_height == NULL)
413 {
414 png_free (png_ptr, info_ptr->scal_s_width);
415 info_ptr->scal_s_width = NULL;
416 png_warning(png_ptr,
417 "Memory allocation failed while processing sCAL.");
418 return;
419 }
420 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
421 info_ptr->valid |= PNG_INFO_sCAL;
422#ifdef PNG_FREE_ME_SUPPORTED
423 info_ptr->free_me |= PNG_FREE_SCAL;
424#endif
425}
426#endif
427#endif
428#endif
429
430#ifdef PNG_pHYs_SUPPORTED
431void PNGAPI
432png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
433 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
434{
435 png_debug1(1, "in %s storage function", "pHYs");
436
437 if (png_ptr == NULL || info_ptr == NULL)
438 return;
439
440 info_ptr->x_pixels_per_unit = res_x;
441 info_ptr->y_pixels_per_unit = res_y;
442 info_ptr->phys_unit_type = (png_byte)unit_type;
443 info_ptr->valid |= PNG_INFO_pHYs;
444}
445#endif
446
447void PNGAPI
448png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
449 png_colorp palette, int num_palette)
450{
451
452 png_debug1(1, "in %s storage function", "PLTE");
453
454 if (png_ptr == NULL || info_ptr == NULL)
455 return;
456
457 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
458 {
459 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
460 png_error(png_ptr, "Invalid palette length");
461 else
462 {
463 png_warning(png_ptr, "Invalid palette length");
464 return;
465 }
466 }
467
468 /* It may not actually be necessary to set png_ptr->palette here;
469 * we do it for backward compatibility with the way the png_handle_tRNS
470 * function used to do the allocation.
471 */
472#ifdef PNG_FREE_ME_SUPPORTED
473 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
474#endif
475
476 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
477 * of num_palette entries, in case of an invalid PNG file that has
478 * too-large sample values.
479 */
480 png_ptr->palette = (png_colorp)png_calloc(png_ptr,
481 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
482 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
483 info_ptr->palette = png_ptr->palette;
484 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
485
486#ifdef PNG_FREE_ME_SUPPORTED
487 info_ptr->free_me |= PNG_FREE_PLTE;
488#else
489 png_ptr->flags |= PNG_FLAG_FREE_PLTE;
490#endif
491
492 info_ptr->valid |= PNG_INFO_PLTE;
493}
494
495#ifdef PNG_sBIT_SUPPORTED
496void PNGAPI
497png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
498 png_color_8p sig_bit)
499{
500 png_debug1(1, "in %s storage function", "sBIT");
501
502 if (png_ptr == NULL || info_ptr == NULL)
503 return;
504
505 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
506 info_ptr->valid |= PNG_INFO_sBIT;
507}
508#endif
509
510#ifdef PNG_sRGB_SUPPORTED
511void PNGAPI
512png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
513{
514 png_debug1(1, "in %s storage function", "sRGB");
515
516 if (png_ptr == NULL || info_ptr == NULL)
517 return;
518
519 info_ptr->srgb_intent = (png_byte)intent;
520 info_ptr->valid |= PNG_INFO_sRGB;
521}
522
523void PNGAPI
524png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
525 int intent)
526{
527#ifdef PNG_gAMA_SUPPORTED
528#ifdef PNG_FLOATING_POINT_SUPPORTED
529 float file_gamma;
530#endif
531#ifdef PNG_FIXED_POINT_SUPPORTED
532 png_fixed_point int_file_gamma;
533#endif
534#endif
535#ifdef PNG_cHRM_SUPPORTED
536#ifdef PNG_FLOATING_POINT_SUPPORTED
537 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
538#endif
539#ifdef PNG_FIXED_POINT_SUPPORTED
540 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
541 int_green_y, int_blue_x, int_blue_y;
542#endif
543#endif
544 png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
545
546 if (png_ptr == NULL || info_ptr == NULL)
547 return;
548
549 png_set_sRGB(png_ptr, info_ptr, intent);
550
551#ifdef PNG_gAMA_SUPPORTED
552#ifdef PNG_FLOATING_POINT_SUPPORTED
553 file_gamma = (float).45455;
554 png_set_gAMA(png_ptr, info_ptr, file_gamma);
555#endif
556#ifdef PNG_FIXED_POINT_SUPPORTED
557 int_file_gamma = 45455L;
558 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
559#endif
560#endif
561
562#ifdef PNG_cHRM_SUPPORTED
563# ifdef PNG_FIXED_POINT_SUPPORTED
564 int_white_x = 31270L;
565 int_white_y = 32900L;
566 int_red_x = 64000L;
567 int_red_y = 33000L;
568 int_green_x = 30000L;
569 int_green_y = 60000L;
570 int_blue_x = 15000L;
571 int_blue_y = 6000L;
572 png_set_cHRM_fixed(png_ptr, info_ptr,
573 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
574 int_green_y, int_blue_x, int_blue_y);
575# endif
576
577# ifdef PNG_FLOATING_POINT_SUPPORTED
578 white_x = (float).3127;
579 white_y = (float).3290;
580 red_x = (float).64;
581 red_y = (float).33;
582 green_x = (float).30;
583 green_y = (float).60;
584 blue_x = (float).15;
585 blue_y = (float).06;
586 png_set_cHRM(png_ptr, info_ptr,
587 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
588# endif
589#endif /* cHRM */
590}
591#endif /* sRGB */
592
593
594#ifdef PNG_iCCP_SUPPORTED
595void PNGAPI
596png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
597 png_charp name, int compression_type,
598 png_charp profile, png_uint_32 proflen)
599{
600 png_charp new_iccp_name;
601 png_charp new_iccp_profile;
602 png_uint_32 length;
603
604 png_debug1(1, "in %s storage function", "iCCP");
605
606 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
607 return;
608
609 length = png_strlen(name)+1;
610 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
611 if (new_iccp_name == NULL)
612 {
613 png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
614 return;
615 }
616 png_memcpy(new_iccp_name, name, length);
617 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
618 if (new_iccp_profile == NULL)
619 {
620 png_free (png_ptr, new_iccp_name);
621 png_warning(png_ptr,
622 "Insufficient memory to process iCCP profile.");
623 return;
624 }
625 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
626
627 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
628
629 info_ptr->iccp_proflen = proflen;
630 info_ptr->iccp_name = new_iccp_name;
631 info_ptr->iccp_profile = new_iccp_profile;
632 /* Compression is always zero but is here so the API and info structure
633 * does not have to change if we introduce multiple compression types
634 */
635 info_ptr->iccp_compression = (png_byte)compression_type;
636#ifdef PNG_FREE_ME_SUPPORTED
637 info_ptr->free_me |= PNG_FREE_ICCP;
638#endif
639 info_ptr->valid |= PNG_INFO_iCCP;
640}
641#endif
642
643#ifdef PNG_TEXT_SUPPORTED
644void PNGAPI
645png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
646 int num_text)
647{
648 int ret;
649 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
650 if (ret)
651 png_error(png_ptr, "Insufficient memory to store text");
652}
653
654int /* PRIVATE */
655png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
656 int num_text)
657{
658 int i;
659
660 png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
661 png_ptr->chunk_name[0] == '\0') ?
662 "text" : (png_const_charp)png_ptr->chunk_name));
663
664 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
665 return(0);
666
667 /* Make sure we have enough space in the "text" array in info_struct
668 * to hold all of the incoming text_ptr objects.
669 */
670 if (info_ptr->num_text + num_text > info_ptr->max_text)
671 {
672 int old_max_text = info_ptr->max_text;
673 int old_num_text = info_ptr->num_text;
674
675 if (info_ptr->text != NULL)
676 {
677 png_textp old_text;
678
679 info_ptr->max_text = info_ptr->num_text + num_text + 8;
680 old_text = info_ptr->text;
681
682 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
683 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
684 if (info_ptr->text == NULL)
685 {
686 /* Restore to previous condition */
687 info_ptr->max_text = old_max_text;
688 info_ptr->text = old_text;
689 return(1);
690 }
691 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text *
692 png_sizeof(png_text)));
693 png_free(png_ptr, old_text);
694 }
695 else
696 {
697 info_ptr->max_text = num_text + 8;
698 info_ptr->num_text = 0;
699 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
700 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
701 if (info_ptr->text == NULL)
702 {
703 /* Restore to previous condition */
704 info_ptr->num_text = old_num_text;
705 info_ptr->max_text = old_max_text;
706 return(1);
707 }
708#ifdef PNG_FREE_ME_SUPPORTED
709 info_ptr->free_me |= PNG_FREE_TEXT;
710#endif
711 }
712 png_debug1(3, "allocated %d entries for info_ptr->text",
713 info_ptr->max_text);
714 }
715
716 for (i = 0; i < num_text; i++)
717 {
718 png_size_t text_length, key_len;
719 png_size_t lang_len, lang_key_len;
720 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
721
722 if (text_ptr[i].key == NULL)
723 continue;
724
725 key_len = png_strlen(text_ptr[i].key);
726
727 if (text_ptr[i].compression <= 0)
728 {
729 lang_len = 0;
730 lang_key_len = 0;
731 }
732
733 else
734#ifdef PNG_iTXt_SUPPORTED
735 {
736 /* Set iTXt data */
737
738 if (text_ptr[i].lang != NULL)
739 lang_len = png_strlen(text_ptr[i].lang);
740 else
741 lang_len = 0;
742 if (text_ptr[i].lang_key != NULL)
743 lang_key_len = png_strlen(text_ptr[i].lang_key);
744 else
745 lang_key_len = 0;
746 }
747#else /* PNG_iTXt_SUPPORTED */
748 {
749 png_warning(png_ptr, "iTXt chunk not supported.");
750 continue;
751 }
752#endif
753
754 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
755 {
756 text_length = 0;
757#ifdef PNG_iTXt_SUPPORTED
758 if (text_ptr[i].compression > 0)
759 textp->compression = PNG_ITXT_COMPRESSION_NONE;
760 else
761#endif
762 textp->compression = PNG_TEXT_COMPRESSION_NONE;
763 }
764
765 else
766 {
767 text_length = png_strlen(text_ptr[i].text);
768 textp->compression = text_ptr[i].compression;
769 }
770
771 textp->key = (png_charp)png_malloc_warn(png_ptr,
772 (png_uint_32)
773 (key_len + text_length + lang_len + lang_key_len + 4));
774 if (textp->key == NULL)
775 return(1);
776 png_debug2(2, "Allocated %lu bytes at %x in png_set_text",
777 (png_uint_32)
778 (key_len + lang_len + lang_key_len + text_length + 4),
779 (int)textp->key);
780
781 png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
782 *(textp->key + key_len) = '\0';
783#ifdef PNG_iTXt_SUPPORTED
784 if (text_ptr[i].compression > 0)
785 {
786 textp->lang = textp->key + key_len + 1;
787 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
788 *(textp->lang + lang_len) = '\0';
789 textp->lang_key = textp->lang + lang_len + 1;
790 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
791 *(textp->lang_key + lang_key_len) = '\0';
792 textp->text = textp->lang_key + lang_key_len + 1;
793 }
794 else
795#endif
796 {
797#ifdef PNG_iTXt_SUPPORTED
798 textp->lang=NULL;
799 textp->lang_key=NULL;
800#endif
801 textp->text = textp->key + key_len + 1;
802 }
803 if (text_length)
804 png_memcpy(textp->text, text_ptr[i].text,
805 (png_size_t)(text_length));
806 *(textp->text + text_length) = '\0';
807
808#ifdef PNG_iTXt_SUPPORTED
809 if (textp->compression > 0)
810 {
811 textp->text_length = 0;
812 textp->itxt_length = text_length;
813 }
814 else
815#endif
816
817 {
818 textp->text_length = text_length;
819#ifdef PNG_iTXt_SUPPORTED
820 textp->itxt_length = 0;
821#endif
822 }
823 info_ptr->num_text++;
824 png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
825 }
826 return(0);
827}
828#endif
829
830#ifdef PNG_tIME_SUPPORTED
831void PNGAPI
832png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
833{
834 png_debug1(1, "in %s storage function", "tIME");
835
836 if (png_ptr == NULL || info_ptr == NULL ||
837 (png_ptr->mode & PNG_WROTE_tIME))
838 return;
839
840 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
841 info_ptr->valid |= PNG_INFO_tIME;
842}
843#endif
844
845#ifdef PNG_tRNS_SUPPORTED
846void PNGAPI
847png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
848 png_bytep trans, int num_trans, png_color_16p trans_values)
849{
850 png_debug1(1, "in %s storage function", "tRNS");
851
852 if (png_ptr == NULL || info_ptr == NULL)
853 return;
854
855 if (num_trans < 0 || num_trans > PNG_MAX_PALETTE_LENGTH)
856 {
857 png_warning(png_ptr, "Ignoring invalid num_trans value");
858 return;
859 }
860
861 if (trans != NULL)
862 {
863 /* It may not actually be necessary to set png_ptr->trans here;
864 * we do it for backward compatibility with the way the png_handle_tRNS
865 * function used to do the allocation.
866 */
867
868#ifdef PNG_FREE_ME_SUPPORTED
869 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
870#endif
871
872 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
873 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
874 (png_uint_32)PNG_MAX_PALETTE_LENGTH);
875 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
876 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
877 }
878
879 if (trans_values != NULL)
880 {
881 int sample_max = (1 << info_ptr->bit_depth);
882 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
883 (int)trans_values->gray > sample_max) ||
884 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
885 ((int)trans_values->red > sample_max ||
886 (int)trans_values->green > sample_max ||
887 (int)trans_values->blue > sample_max)))
888 png_warning(png_ptr,
889 "tRNS chunk has out-of-range samples for bit_depth");
890 png_memcpy(&(info_ptr->trans_values), trans_values,
891 png_sizeof(png_color_16));
892 if (num_trans == 0)
893 num_trans = 1;
894 }
895
896 info_ptr->num_trans = (png_uint_16)num_trans;
897 if (num_trans != 0)
898 {
899 info_ptr->valid |= PNG_INFO_tRNS;
900#ifdef PNG_FREE_ME_SUPPORTED
901 info_ptr->free_me |= PNG_FREE_TRNS;
902#else
903 png_ptr->flags |= PNG_FLAG_FREE_TRNS;
904#endif
905 }
906}
907#endif
908
909#ifdef PNG_sPLT_SUPPORTED
910void PNGAPI
911png_set_sPLT(png_structp png_ptr,
912 png_infop info_ptr, png_sPLT_tp entries, int nentries)
913/*
914 * entries - array of png_sPLT_t structures
915 * to be added to the list of palettes
916 * in the info structure.
917 * nentries - number of palette structures to be
918 * added.
919 */
920{
921 png_sPLT_tp np;
922 int i;
923
924 if (png_ptr == NULL || info_ptr == NULL)
925 return;
926
927 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
928 (info_ptr->splt_palettes_num + nentries) *
929 (png_uint_32)png_sizeof(png_sPLT_t));
930 if (np == NULL)
931 {
932 png_warning(png_ptr, "No memory for sPLT palettes.");
933 return;
934 }
935
936 png_memcpy(np, info_ptr->splt_palettes,
937 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
938 png_free(png_ptr, info_ptr->splt_palettes);
939 info_ptr->splt_palettes=NULL;
940
941 for (i = 0; i < nentries; i++)
942 {
943 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
944 png_sPLT_tp from = entries + i;
945 png_uint_32 length;
946
947 length = png_strlen(from->name) + 1;
948 to->name = (png_charp)png_malloc_warn(png_ptr, length);
949 if (to->name == NULL)
950 {
951 png_warning(png_ptr,
952 "Out of memory while processing sPLT chunk");
953 continue;
954 }
955 png_memcpy(to->name, from->name, length);
956 to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
957 (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
958 if (to->entries == NULL)
959 {
960 png_warning(png_ptr,
961 "Out of memory while processing sPLT chunk");
962 png_free(png_ptr, to->name);
963 to->name = NULL;
964 continue;
965 }
966 png_memcpy(to->entries, from->entries,
967 from->nentries * png_sizeof(png_sPLT_entry));
968 to->nentries = from->nentries;
969 to->depth = from->depth;
970 }
971
972 info_ptr->splt_palettes = np;
973 info_ptr->splt_palettes_num += nentries;
974 info_ptr->valid |= PNG_INFO_sPLT;
975#ifdef PNG_FREE_ME_SUPPORTED
976 info_ptr->free_me |= PNG_FREE_SPLT;
977#endif
978}
979#endif /* PNG_sPLT_SUPPORTED */
980
981#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
982void PNGAPI
983png_set_unknown_chunks(png_structp png_ptr,
984 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
985{
986 png_unknown_chunkp np;
987 int i;
988
989 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
990 return;
991
992 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
993 (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
994 png_sizeof(png_unknown_chunk)));
995 if (np == NULL)
996 {
997 png_warning(png_ptr,
998 "Out of memory while processing unknown chunk.");
999 return;
1000 }
1001
1002 png_memcpy(np, info_ptr->unknown_chunks,
1003 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
1004 png_free(png_ptr, info_ptr->unknown_chunks);
1005 info_ptr->unknown_chunks = NULL;
1006
1007 for (i = 0; i < num_unknowns; i++)
1008 {
1009 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
1010 png_unknown_chunkp from = unknowns + i;
1011
1012 png_memcpy((png_charp)to->name, (png_charp)from->name,
1013 png_sizeof(from->name));
1014 to->name[png_sizeof(to->name)-1] = '\0';
1015 to->size = from->size;
1016 /* Note our location in the read or write sequence */
1017 to->location = (png_byte)(png_ptr->mode & 0xff);
1018
1019 if (from->size == 0)
1020 to->data=NULL;
1021 else
1022 {
1023 to->data = (png_bytep)png_malloc_warn(png_ptr,
1024 (png_uint_32)from->size);
1025 if (to->data == NULL)
1026 {
1027 png_warning(png_ptr,
1028 "Out of memory while processing unknown chunk.");
1029 to->size = 0;
1030 }
1031 else
1032 png_memcpy(to->data, from->data, from->size);
1033 }
1034 }
1035
1036 info_ptr->unknown_chunks = np;
1037 info_ptr->unknown_chunks_num += num_unknowns;
1038#ifdef PNG_FREE_ME_SUPPORTED
1039 info_ptr->free_me |= PNG_FREE_UNKN;
1040#endif
1041}
1042void PNGAPI
1043png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1044 int chunk, int location)
1045{
1046 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1047 (int)info_ptr->unknown_chunks_num)
1048 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1049}
1050#endif
1051
1052#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1053#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
1054 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
1055void PNGAPI
1056png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
1057{
1058 /* This function is deprecated in favor of png_permit_mng_features()
1059 and will be removed from libpng-1.3.0 */
1060
1061 png_debug(1, "in png_permit_empty_plte, DEPRECATED.");
1062
1063 if (png_ptr == NULL)
1064 return;
1065 png_ptr->mng_features_permitted = (png_byte)
1066 ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
1067 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
1068}
1069#endif
1070#endif
1071
1072#ifdef PNG_MNG_FEATURES_SUPPORTED
1073png_uint_32 PNGAPI
1074png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1075{
1076 png_debug(1, "in png_permit_mng_features");
1077
1078 if (png_ptr == NULL)
1079 return (png_uint_32)0;
1080 png_ptr->mng_features_permitted =
1081 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1082 return (png_uint_32)png_ptr->mng_features_permitted;
1083}
1084#endif
1085
1086#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1087void PNGAPI
1088png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
1089 chunk_list, int num_chunks)
1090{
1091 png_bytep new_list, p;
1092 int i, old_num_chunks;
1093 if (png_ptr == NULL)
1094 return;
1095 if (num_chunks == 0)
1096 {
1097 if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1098 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1099 else
1100 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1101
1102 if (keep == PNG_HANDLE_CHUNK_ALWAYS)
1103 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1104 else
1105 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1106 return;
1107 }
1108 if (chunk_list == NULL)
1109 return;
1110 old_num_chunks = png_ptr->num_chunk_list;
1111 new_list=(png_bytep)png_malloc(png_ptr,
1112 (png_uint_32)
1113 (5*(num_chunks + old_num_chunks)));
1114 if (png_ptr->chunk_list != NULL)
1115 {
1116 png_memcpy(new_list, png_ptr->chunk_list,
1117 (png_size_t)(5*old_num_chunks));
1118 png_free(png_ptr, png_ptr->chunk_list);
1119 png_ptr->chunk_list=NULL;
1120 }
1121 png_memcpy(new_list + 5*old_num_chunks, chunk_list,
1122 (png_size_t)(5*num_chunks));
1123 for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
1124 *p=(png_byte)keep;
1125 png_ptr->num_chunk_list = old_num_chunks + num_chunks;
1126 png_ptr->chunk_list = new_list;
1127#ifdef PNG_FREE_ME_SUPPORTED
1128 png_ptr->free_me |= PNG_FREE_LIST;
1129#endif
1130}
1131#endif
1132
1133#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1134void PNGAPI
1135png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1136 png_user_chunk_ptr read_user_chunk_fn)
1137{
1138 png_debug(1, "in png_set_read_user_chunk_fn");
1139
1140 if (png_ptr == NULL)
1141 return;
1142
1143 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1144 png_ptr->user_chunk_ptr = user_chunk_ptr;
1145}
1146#endif
1147
1148#ifdef PNG_INFO_IMAGE_SUPPORTED
1149void PNGAPI
1150png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1151{
1152 png_debug1(1, "in %s storage function", "rows");
1153
1154 if (png_ptr == NULL || info_ptr == NULL)
1155 return;
1156
1157 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1158 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1159 info_ptr->row_pointers = row_pointers;
1160 if (row_pointers)
1161 info_ptr->valid |= PNG_INFO_IDAT;
1162}
1163#endif
1164
1165void PNGAPI
1166png_set_compression_buffer_size(png_structp png_ptr,
1167 png_uint_32 size)
1168{
1169 if (png_ptr == NULL)
1170 return;
1171 png_free(png_ptr, png_ptr->zbuf);
1172 png_ptr->zbuf_size = (png_size_t)size;
1173 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1174 png_ptr->zstream.next_out = png_ptr->zbuf;
1175 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1176}
1177
1178void PNGAPI
1179png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1180{
1181 if (png_ptr && info_ptr)
1182 info_ptr->valid &= ~mask;
1183}
1184
1185
1186#ifndef PNG_1_0_X
1187#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1188/* Function was added to libpng 1.2.0 and should always exist by default */
1189void PNGAPI
1190png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
1191{
1192/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
1193 if (png_ptr != NULL)
1194 png_ptr->asm_flags = 0;
1195 PNG_UNUSED(asm_flags) /* Quiet the compiler */
1196}
1197
1198/* This function was added to libpng 1.2.0 */
1199void PNGAPI
1200png_set_mmx_thresholds (png_structp png_ptr,
1201 png_byte mmx_bitdepth_threshold,
1202 png_uint_32 mmx_rowbytes_threshold)
1203{
1204/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
1205 if (png_ptr == NULL)
1206 return;
1207 /* Quiet the compiler */
1208 PNG_UNUSED(mmx_bitdepth_threshold)
1209 PNG_UNUSED(mmx_rowbytes_threshold)
1210}
1211#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1212
1213#ifdef PNG_SET_USER_LIMITS_SUPPORTED
1214/* This function was added to libpng 1.2.6 */
1215void PNGAPI
1216png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1217 png_uint_32 user_height_max)
1218{
1219 /* Images with dimensions larger than these limits will be
1220 * rejected by png_set_IHDR(). To accept any PNG datastream
1221 * regardless of dimensions, set both limits to 0x7ffffffL.
1222 */
1223 if (png_ptr == NULL)
1224 return;
1225 png_ptr->user_width_max = user_width_max;
1226 png_ptr->user_height_max = user_height_max;
1227}
1228#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1229
1230
1231#ifdef PNG_BENIGN_ERRORS_SUPPORTED
1232void PNGAPI
1233png_set_benign_errors(png_structp png_ptr, int allowed)
1234{
1235 png_debug(1, "in png_set_benign_errors");
1236
1237 if (allowed)
1238 png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
1239 else
1240 png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
1241}
1242#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
1243#endif /* ?PNG_1_0_X */
1244#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
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