[DINPUT]
[reactos.git] / reactos / dll / 3rdparty / libpng / pngset.c
1
2 /* pngset.c - storage of image information into info struct
3 *
4 * Last changed in libpng 1.5.14 [January 24, 2013]
5 * Copyright (c) 1998-2013 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 void PNGFAPI
68 png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr,
69 png_fixed_point int_red_X, png_fixed_point int_red_Y,
70 png_fixed_point int_red_Z, png_fixed_point int_green_X,
71 png_fixed_point int_green_Y, png_fixed_point int_green_Z,
72 png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
73 png_fixed_point int_blue_Z)
74 {
75 png_XYZ XYZ;
76 png_xy xy;
77
78 png_debug1(1, "in %s storage function", "cHRM XYZ fixed");
79
80 if (png_ptr == NULL || info_ptr == NULL)
81 return;
82
83 XYZ.redX = int_red_X;
84 XYZ.redY = int_red_Y;
85 XYZ.redZ = int_red_Z;
86 XYZ.greenX = int_green_X;
87 XYZ.greenY = int_green_Y;
88 XYZ.greenZ = int_green_Z;
89 XYZ.blueX = int_blue_X;
90 XYZ.blueY = int_blue_Y;
91 XYZ.blueZ = int_blue_Z;
92
93 if (png_xy_from_XYZ(&xy, XYZ))
94 png_error(png_ptr, "XYZ values out of representable range");
95
96 png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy,
97 xy.greenx, xy.greeny, xy.bluex, xy.bluey);
98 }
99
100 # ifdef PNG_FLOATING_POINT_SUPPORTED
101 void PNGAPI
102 png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
103 double white_x, double white_y, double red_x, double red_y,
104 double green_x, double green_y, double blue_x, double blue_y)
105 {
106 png_set_cHRM_fixed(png_ptr, info_ptr,
107 png_fixed(png_ptr, white_x, "cHRM White X"),
108 png_fixed(png_ptr, white_y, "cHRM White Y"),
109 png_fixed(png_ptr, red_x, "cHRM Red X"),
110 png_fixed(png_ptr, red_y, "cHRM Red Y"),
111 png_fixed(png_ptr, green_x, "cHRM Green X"),
112 png_fixed(png_ptr, green_y, "cHRM Green Y"),
113 png_fixed(png_ptr, blue_x, "cHRM Blue X"),
114 png_fixed(png_ptr, blue_y, "cHRM Blue Y"));
115 }
116
117 void PNGAPI
118 png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X,
119 double red_Y, double red_Z, double green_X, double green_Y, double green_Z,
120 double blue_X, double blue_Y, double blue_Z)
121 {
122 png_set_cHRM_XYZ_fixed(png_ptr, info_ptr,
123 png_fixed(png_ptr, red_X, "cHRM Red X"),
124 png_fixed(png_ptr, red_Y, "cHRM Red Y"),
125 png_fixed(png_ptr, red_Z, "cHRM Red Z"),
126 png_fixed(png_ptr, green_X, "cHRM Red X"),
127 png_fixed(png_ptr, green_Y, "cHRM Red Y"),
128 png_fixed(png_ptr, green_Z, "cHRM Red Z"),
129 png_fixed(png_ptr, blue_X, "cHRM Red X"),
130 png_fixed(png_ptr, blue_Y, "cHRM Red Y"),
131 png_fixed(png_ptr, blue_Z, "cHRM Red Z"));
132 }
133 # endif /* PNG_FLOATING_POINT_SUPPORTED */
134
135 #endif /* PNG_cHRM_SUPPORTED */
136
137 #ifdef PNG_gAMA_SUPPORTED
138 void PNGFAPI
139 png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
140 file_gamma)
141 {
142 png_debug1(1, "in %s storage function", "gAMA");
143
144 if (png_ptr == NULL || info_ptr == NULL)
145 return;
146
147 /* Changed in libpng-1.5.4 to limit the values to ensure overflow can't
148 * occur. Since the fixed point representation is assymetrical it is
149 * possible for 1/gamma to overflow the limit of 21474 and this means the
150 * gamma value must be at least 5/100000 and hence at most 20000.0. For
151 * safety the limits here are a little narrower. The values are 0.00016 to
152 * 6250.0, which are truly ridiculous gamma values (and will produce
153 * displays that are all black or all white.)
154 */
155 if (file_gamma < 16 || file_gamma > 625000000)
156 png_warning(png_ptr, "Out of range gamma value ignored");
157
158 else
159 {
160 info_ptr->gamma = file_gamma;
161 info_ptr->valid |= PNG_INFO_gAMA;
162 }
163 }
164
165 # ifdef PNG_FLOATING_POINT_SUPPORTED
166 void PNGAPI
167 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
168 {
169 png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma,
170 "png_set_gAMA"));
171 }
172 # endif
173 #endif
174
175 #ifdef PNG_hIST_SUPPORTED
176 void PNGAPI
177 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist)
178 {
179 int i;
180
181 png_debug1(1, "in %s storage function", "hIST");
182
183 if (png_ptr == NULL || info_ptr == NULL)
184 return;
185
186 if (info_ptr->num_palette == 0 || info_ptr->num_palette
187 > PNG_MAX_PALETTE_LENGTH)
188 {
189 png_warning(png_ptr,
190 "Invalid palette size, hIST allocation skipped");
191
192 return;
193 }
194
195 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
196
197 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
198 * version 1.2.1
199 */
200 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
201 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));
202
203 if (png_ptr->hist == NULL)
204 {
205 png_warning(png_ptr, "Insufficient memory for hIST chunk data");
206 return;
207 }
208
209 for (i = 0; i < info_ptr->num_palette; i++)
210 png_ptr->hist[i] = hist[i];
211
212 info_ptr->hist = png_ptr->hist;
213 info_ptr->valid |= PNG_INFO_hIST;
214 info_ptr->free_me |= PNG_FREE_HIST;
215 }
216 #endif
217
218 void PNGAPI
219 png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
220 png_uint_32 width, png_uint_32 height, int bit_depth,
221 int color_type, int interlace_type, int compression_type,
222 int filter_type)
223 {
224 png_debug1(1, "in %s storage function", "IHDR");
225
226 if (png_ptr == NULL || info_ptr == NULL)
227 return;
228
229 info_ptr->width = width;
230 info_ptr->height = height;
231 info_ptr->bit_depth = (png_byte)bit_depth;
232 info_ptr->color_type = (png_byte)color_type;
233 info_ptr->compression_type = (png_byte)compression_type;
234 info_ptr->filter_type = (png_byte)filter_type;
235 info_ptr->interlace_type = (png_byte)interlace_type;
236
237 png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
238 info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
239 info_ptr->compression_type, info_ptr->filter_type);
240
241 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
242 info_ptr->channels = 1;
243
244 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
245 info_ptr->channels = 3;
246
247 else
248 info_ptr->channels = 1;
249
250 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
251 info_ptr->channels++;
252
253 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
254
255 /* Check for potential overflow */
256 if (width >
257 (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */
258 - 48 /* bigrowbuf hack */
259 - 1 /* filter byte */
260 - 7*8 /* rounding of width to multiple of 8 pixels */
261 - 8) /* extra max_pixel_depth pad */
262 info_ptr->rowbytes = 0;
263 else
264 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
265 }
266
267 #ifdef PNG_oFFs_SUPPORTED
268 void PNGAPI
269 png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
270 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
271 {
272 png_debug1(1, "in %s storage function", "oFFs");
273
274 if (png_ptr == NULL || info_ptr == NULL)
275 return;
276
277 info_ptr->x_offset = offset_x;
278 info_ptr->y_offset = offset_y;
279 info_ptr->offset_unit_type = (png_byte)unit_type;
280 info_ptr->valid |= PNG_INFO_oFFs;
281 }
282 #endif
283
284 #ifdef PNG_pCAL_SUPPORTED
285 void PNGAPI
286 png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
287 png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
288 int nparams, png_const_charp units, png_charpp params)
289 {
290 png_size_t length;
291 int i;
292
293 png_debug1(1, "in %s storage function", "pCAL");
294
295 if (png_ptr == NULL || info_ptr == NULL)
296 return;
297
298 length = png_strlen(purpose) + 1;
299 png_debug1(3, "allocating purpose for info (%lu bytes)",
300 (unsigned long)length);
301
302 /* TODO: validate format of calibration name and unit name */
303
304 /* Check that the type matches the specification. */
305 if (type < 0 || type > 3)
306 png_error(png_ptr, "Invalid pCAL equation type");
307
308 /* Validate params[nparams] */
309 for (i=0; i<nparams; ++i)
310 if (!png_check_fp_string(params[i], png_strlen(params[i])))
311 png_error(png_ptr, "Invalid format for pCAL parameter");
312
313 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
314
315 if (info_ptr->pcal_purpose == NULL)
316 {
317 png_warning(png_ptr, "Insufficient memory for pCAL purpose");
318 return;
319 }
320
321 png_memcpy(info_ptr->pcal_purpose, purpose, length);
322
323 png_debug(3, "storing X0, X1, type, and nparams in info");
324 info_ptr->pcal_X0 = X0;
325 info_ptr->pcal_X1 = X1;
326 info_ptr->pcal_type = (png_byte)type;
327 info_ptr->pcal_nparams = (png_byte)nparams;
328
329 length = png_strlen(units) + 1;
330 png_debug1(3, "allocating units for info (%lu bytes)",
331 (unsigned long)length);
332
333 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
334
335 if (info_ptr->pcal_units == NULL)
336 {
337 png_warning(png_ptr, "Insufficient memory for pCAL units");
338 return;
339 }
340
341 png_memcpy(info_ptr->pcal_units, units, length);
342
343 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
344 (png_size_t)((nparams + 1) * png_sizeof(png_charp)));
345
346 if (info_ptr->pcal_params == NULL)
347 {
348 png_warning(png_ptr, "Insufficient memory for pCAL params");
349 return;
350 }
351
352 png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
353
354 for (i = 0; i < nparams; i++)
355 {
356 length = png_strlen(params[i]) + 1;
357 png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
358 (unsigned long)length);
359
360 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
361
362 if (info_ptr->pcal_params[i] == NULL)
363 {
364 png_warning(png_ptr, "Insufficient memory for pCAL parameter");
365 return;
366 }
367
368 png_memcpy(info_ptr->pcal_params[i], params[i], length);
369 }
370
371 info_ptr->valid |= PNG_INFO_pCAL;
372 info_ptr->free_me |= PNG_FREE_PCAL;
373 }
374 #endif
375
376 #ifdef PNG_sCAL_SUPPORTED
377 void PNGAPI
378 png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
379 int unit, png_const_charp swidth, png_const_charp sheight)
380 {
381 png_size_t lengthw = 0, lengthh = 0;
382
383 png_debug1(1, "in %s storage function", "sCAL");
384
385 if (png_ptr == NULL || info_ptr == NULL)
386 return;
387
388 /* Double check the unit (should never get here with an invalid
389 * unit unless this is an API call.)
390 */
391 if (unit != 1 && unit != 2)
392 png_error(png_ptr, "Invalid sCAL unit");
393
394 if (swidth == NULL || (lengthw = png_strlen(swidth)) == 0 ||
395 swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw))
396 png_error(png_ptr, "Invalid sCAL width");
397
398 if (sheight == NULL || (lengthh = png_strlen(sheight)) == 0 ||
399 sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh))
400 png_error(png_ptr, "Invalid sCAL height");
401
402 info_ptr->scal_unit = (png_byte)unit;
403
404 ++lengthw;
405
406 png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw);
407
408 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw);
409
410 if (info_ptr->scal_s_width == NULL)
411 {
412 png_warning(png_ptr, "Memory allocation failed while processing sCAL");
413 return;
414 }
415
416 png_memcpy(info_ptr->scal_s_width, swidth, lengthw);
417
418 ++lengthh;
419
420 png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh);
421
422 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh);
423
424 if (info_ptr->scal_s_height == NULL)
425 {
426 png_free (png_ptr, info_ptr->scal_s_width);
427 info_ptr->scal_s_width = NULL;
428
429 png_warning(png_ptr, "Memory allocation failed while processing sCAL");
430 return;
431 }
432
433 png_memcpy(info_ptr->scal_s_height, sheight, lengthh);
434
435 info_ptr->valid |= PNG_INFO_sCAL;
436 info_ptr->free_me |= PNG_FREE_SCAL;
437 }
438
439 # ifdef PNG_FLOATING_POINT_SUPPORTED
440 void PNGAPI
441 png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width,
442 double height)
443 {
444 png_debug1(1, "in %s storage function", "sCAL");
445
446 /* Check the arguments. */
447 if (width <= 0)
448 png_warning(png_ptr, "Invalid sCAL width ignored");
449
450 else if (height <= 0)
451 png_warning(png_ptr, "Invalid sCAL height ignored");
452
453 else
454 {
455 /* Convert 'width' and 'height' to ASCII. */
456 char swidth[PNG_sCAL_MAX_DIGITS+1];
457 char sheight[PNG_sCAL_MAX_DIGITS+1];
458
459 png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width,
460 PNG_sCAL_PRECISION);
461 png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height,
462 PNG_sCAL_PRECISION);
463
464 png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
465 }
466 }
467 # endif
468
469 # ifdef PNG_FIXED_POINT_SUPPORTED
470 void PNGAPI
471 png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit,
472 png_fixed_point width, png_fixed_point height)
473 {
474 png_debug1(1, "in %s storage function", "sCAL");
475
476 /* Check the arguments. */
477 if (width <= 0)
478 png_warning(png_ptr, "Invalid sCAL width ignored");
479
480 else if (height <= 0)
481 png_warning(png_ptr, "Invalid sCAL height ignored");
482
483 else
484 {
485 /* Convert 'width' and 'height' to ASCII. */
486 char swidth[PNG_sCAL_MAX_DIGITS+1];
487 char sheight[PNG_sCAL_MAX_DIGITS+1];
488
489 png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width);
490 png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height);
491
492 png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
493 }
494 }
495 # endif
496 #endif
497
498 #ifdef PNG_pHYs_SUPPORTED
499 void PNGAPI
500 png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
501 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
502 {
503 png_debug1(1, "in %s storage function", "pHYs");
504
505 if (png_ptr == NULL || info_ptr == NULL)
506 return;
507
508 info_ptr->x_pixels_per_unit = res_x;
509 info_ptr->y_pixels_per_unit = res_y;
510 info_ptr->phys_unit_type = (png_byte)unit_type;
511 info_ptr->valid |= PNG_INFO_pHYs;
512 }
513 #endif
514
515 void PNGAPI
516 png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
517 png_const_colorp palette, int num_palette)
518 {
519
520 png_debug1(1, "in %s storage function", "PLTE");
521
522 if (png_ptr == NULL || info_ptr == NULL)
523 return;
524
525 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
526 {
527 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
528 png_error(png_ptr, "Invalid palette length");
529
530 else
531 {
532 png_warning(png_ptr, "Invalid palette length");
533 return;
534 }
535 }
536
537 /* It may not actually be necessary to set png_ptr->palette here;
538 * we do it for backward compatibility with the way the png_handle_tRNS
539 * function used to do the allocation.
540 */
541 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
542
543 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
544 * of num_palette entries, in case of an invalid PNG file that has
545 * too-large sample values.
546 */
547 png_ptr->palette = (png_colorp)png_calloc(png_ptr,
548 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
549
550 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
551 info_ptr->palette = png_ptr->palette;
552 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
553
554 info_ptr->free_me |= PNG_FREE_PLTE;
555
556 info_ptr->valid |= PNG_INFO_PLTE;
557 }
558
559 #ifdef PNG_sBIT_SUPPORTED
560 void PNGAPI
561 png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
562 png_const_color_8p sig_bit)
563 {
564 png_debug1(1, "in %s storage function", "sBIT");
565
566 if (png_ptr == NULL || info_ptr == NULL)
567 return;
568
569 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
570 info_ptr->valid |= PNG_INFO_sBIT;
571 }
572 #endif
573
574 #ifdef PNG_sRGB_SUPPORTED
575 void PNGAPI
576 png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent)
577 {
578 png_debug1(1, "in %s storage function", "sRGB");
579
580 if (png_ptr == NULL || info_ptr == NULL)
581 return;
582
583 info_ptr->srgb_intent = (png_byte)srgb_intent;
584 info_ptr->valid |= PNG_INFO_sRGB;
585 }
586
587 void PNGAPI
588 png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
589 int srgb_intent)
590 {
591 png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
592
593 if (png_ptr == NULL || info_ptr == NULL)
594 return;
595
596 png_set_sRGB(png_ptr, info_ptr, srgb_intent);
597
598 # ifdef PNG_gAMA_SUPPORTED
599 png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE);
600 # endif
601
602 # ifdef PNG_cHRM_SUPPORTED
603 png_set_cHRM_fixed(png_ptr, info_ptr,
604 /* color x y */
605 /* white */ 31270, 32900,
606 /* red */ 64000, 33000,
607 /* green */ 30000, 60000,
608 /* blue */ 15000, 6000
609 );
610 # endif /* cHRM */
611 }
612 #endif /* sRGB */
613
614
615 #ifdef PNG_iCCP_SUPPORTED
616 void PNGAPI
617 png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
618 png_const_charp name, int compression_type,
619 png_const_bytep profile, png_uint_32 proflen)
620 {
621 png_charp new_iccp_name;
622 png_bytep new_iccp_profile;
623 png_size_t length;
624
625 png_debug1(1, "in %s storage function", "iCCP");
626
627 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
628 return;
629
630 length = png_strlen(name)+1;
631 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
632
633 if (new_iccp_name == NULL)
634 {
635 png_warning(png_ptr, "Insufficient memory to process iCCP chunk");
636 return;
637 }
638
639 png_memcpy(new_iccp_name, name, length);
640 new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen);
641
642 if (new_iccp_profile == NULL)
643 {
644 png_free (png_ptr, new_iccp_name);
645 png_warning(png_ptr,
646 "Insufficient memory to process iCCP profile");
647 return;
648 }
649
650 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
651
652 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
653
654 info_ptr->iccp_proflen = proflen;
655 info_ptr->iccp_name = new_iccp_name;
656 info_ptr->iccp_profile = new_iccp_profile;
657 /* Compression is always zero but is here so the API and info structure
658 * does not have to change if we introduce multiple compression types
659 */
660 info_ptr->iccp_compression = (png_byte)compression_type;
661 info_ptr->free_me |= PNG_FREE_ICCP;
662 info_ptr->valid |= PNG_INFO_iCCP;
663 }
664 #endif
665
666 #ifdef PNG_TEXT_SUPPORTED
667 void PNGAPI
668 png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr,
669 int num_text)
670 {
671 int ret;
672 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
673
674 if (ret)
675 png_error(png_ptr, "Insufficient memory to store text");
676 }
677
678 int /* PRIVATE */
679 png_set_text_2(png_structp png_ptr, png_infop info_ptr,
680 png_const_textp text_ptr, int num_text)
681 {
682 int i;
683
684 png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" :
685 (unsigned long)png_ptr->chunk_name);
686
687 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
688 return(0);
689
690 /* Make sure we have enough space in the "text" array in info_struct
691 * to hold all of the incoming text_ptr objects.
692 */
693
694 if (num_text < 0 ||
695 num_text > INT_MAX - info_ptr->num_text - 8 ||
696 (unsigned int)/*SAFE*/(num_text +/*SAFE*/
697 info_ptr->num_text + 8) >=
698 PNG_SIZE_MAX/png_sizeof(png_text))
699 {
700 png_warning(png_ptr, "too many text chunks");
701 return(0);
702 }
703
704 if (info_ptr->num_text + num_text > info_ptr->max_text)
705 {
706 int old_max_text = info_ptr->max_text;
707 int old_num_text = info_ptr->num_text;
708
709 if (info_ptr->text != NULL)
710 {
711 png_textp old_text;
712
713 info_ptr->max_text = info_ptr->num_text + num_text + 8;
714 old_text = info_ptr->text;
715
716 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
717 (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
718
719 if (info_ptr->text == NULL)
720 {
721 /* Restore to previous condition */
722 info_ptr->max_text = old_max_text;
723 info_ptr->text = old_text;
724 return(1);
725 }
726
727 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text *
728 png_sizeof(png_text)));
729 png_free(png_ptr, old_text);
730 }
731
732 else
733 {
734 info_ptr->max_text = num_text + 8;
735 info_ptr->num_text = 0;
736 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
737 (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
738 if (info_ptr->text == NULL)
739 {
740 /* Restore to previous condition */
741 info_ptr->num_text = old_num_text;
742 info_ptr->max_text = old_max_text;
743 return(1);
744 }
745 info_ptr->free_me |= PNG_FREE_TEXT;
746 }
747
748 png_debug1(3, "allocated %d entries for info_ptr->text",
749 info_ptr->max_text);
750 }
751 for (i = 0; i < num_text; i++)
752 {
753 png_size_t text_length, key_len;
754 png_size_t lang_len, lang_key_len;
755 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
756
757 if (text_ptr[i].key == NULL)
758 continue;
759
760 if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
761 text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
762 {
763 png_warning(png_ptr, "text compression mode is out of range");
764 continue;
765 }
766
767 key_len = png_strlen(text_ptr[i].key);
768
769 if (text_ptr[i].compression <= 0)
770 {
771 lang_len = 0;
772 lang_key_len = 0;
773 }
774
775 else
776 # ifdef PNG_iTXt_SUPPORTED
777 {
778 /* Set iTXt data */
779
780 if (text_ptr[i].lang != NULL)
781 lang_len = png_strlen(text_ptr[i].lang);
782
783 else
784 lang_len = 0;
785
786 if (text_ptr[i].lang_key != NULL)
787 lang_key_len = png_strlen(text_ptr[i].lang_key);
788
789 else
790 lang_key_len = 0;
791 }
792 # else /* PNG_iTXt_SUPPORTED */
793 {
794 png_warning(png_ptr, "iTXt chunk not supported");
795 continue;
796 }
797 # endif
798
799 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
800 {
801 text_length = 0;
802 # ifdef PNG_iTXt_SUPPORTED
803 if (text_ptr[i].compression > 0)
804 textp->compression = PNG_ITXT_COMPRESSION_NONE;
805
806 else
807 # endif
808 textp->compression = PNG_TEXT_COMPRESSION_NONE;
809 }
810
811 else
812 {
813 text_length = png_strlen(text_ptr[i].text);
814 textp->compression = text_ptr[i].compression;
815 }
816
817 textp->key = (png_charp)png_malloc_warn(png_ptr,
818 (png_size_t)
819 (key_len + text_length + lang_len + lang_key_len + 4));
820
821 if (textp->key == NULL)
822 return(1);
823
824 png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
825 (unsigned long)(png_uint_32)
826 (key_len + lang_len + lang_key_len + text_length + 4),
827 textp->key);
828
829 png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
830 *(textp->key + key_len) = '\0';
831
832 if (text_ptr[i].compression > 0)
833 {
834 textp->lang = textp->key + key_len + 1;
835 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
836 *(textp->lang + lang_len) = '\0';
837 textp->lang_key = textp->lang + lang_len + 1;
838 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
839 *(textp->lang_key + lang_key_len) = '\0';
840 textp->text = textp->lang_key + lang_key_len + 1;
841 }
842
843 else
844 {
845 textp->lang=NULL;
846 textp->lang_key=NULL;
847 textp->text = textp->key + key_len + 1;
848 }
849
850 if (text_length)
851 png_memcpy(textp->text, text_ptr[i].text,
852 (png_size_t)(text_length));
853
854 *(textp->text + text_length) = '\0';
855
856 # ifdef PNG_iTXt_SUPPORTED
857 if (textp->compression > 0)
858 {
859 textp->text_length = 0;
860 textp->itxt_length = text_length;
861 }
862
863 else
864 # endif
865 {
866 textp->text_length = text_length;
867 textp->itxt_length = 0;
868 }
869
870 info_ptr->num_text++;
871 png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
872 }
873 return(0);
874 }
875 #endif
876
877 #ifdef PNG_tIME_SUPPORTED
878 void PNGAPI
879 png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
880 {
881 png_debug1(1, "in %s storage function", "tIME");
882
883 if (png_ptr == NULL || info_ptr == NULL ||
884 (png_ptr->mode & PNG_WROTE_tIME))
885 return;
886
887 if (mod_time->month == 0 || mod_time->month > 12 ||
888 mod_time->day == 0 || mod_time->day > 31 ||
889 mod_time->hour > 23 || mod_time->minute > 59 ||
890 mod_time->second > 60)
891 {
892 png_warning(png_ptr, "Ignoring invalid time value");
893 return;
894 }
895
896 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
897 info_ptr->valid |= PNG_INFO_tIME;
898 }
899 #endif
900
901 #ifdef PNG_tRNS_SUPPORTED
902 void PNGAPI
903 png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
904 png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
905 {
906 png_debug1(1, "in %s storage function", "tRNS");
907
908 if (png_ptr == NULL || info_ptr == NULL)
909 return;
910
911 if (num_trans < 0 || num_trans > PNG_MAX_PALETTE_LENGTH)
912 {
913 png_warning(png_ptr, "Ignoring invalid num_trans value");
914 return;
915 }
916
917 if (trans_alpha != NULL)
918 {
919 /* It may not actually be necessary to set png_ptr->trans_alpha here;
920 * we do it for backward compatibility with the way the png_handle_tRNS
921 * function used to do the allocation.
922 */
923
924 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
925
926 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
927 png_ptr->trans_alpha = info_ptr->trans_alpha =
928 (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH);
929
930 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
931 png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
932 }
933
934 if (trans_color != NULL)
935 {
936 int sample_max = (1 << info_ptr->bit_depth);
937
938 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
939 (int)trans_color->gray > sample_max) ||
940 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
941 ((int)trans_color->red > sample_max ||
942 (int)trans_color->green > sample_max ||
943 (int)trans_color->blue > sample_max)))
944 png_warning(png_ptr,
945 "tRNS chunk has out-of-range samples for bit_depth");
946
947 png_memcpy(&(info_ptr->trans_color), trans_color,
948 png_sizeof(png_color_16));
949
950 if (num_trans == 0)
951 num_trans = 1;
952 }
953
954 info_ptr->num_trans = (png_uint_16)num_trans;
955
956 if (num_trans != 0)
957 {
958 info_ptr->valid |= PNG_INFO_tRNS;
959 info_ptr->free_me |= PNG_FREE_TRNS;
960 }
961 }
962 #endif
963
964 #ifdef PNG_sPLT_SUPPORTED
965 void PNGAPI
966 png_set_sPLT(png_structp png_ptr,
967 png_infop info_ptr, png_const_sPLT_tp entries, int nentries)
968 /*
969 * entries - array of png_sPLT_t structures
970 * to be added to the list of palettes
971 * in the info structure.
972 *
973 * nentries - number of palette structures to be
974 * added.
975 */
976 {
977 png_sPLT_tp np;
978 int i;
979
980 if (png_ptr == NULL || info_ptr == NULL)
981 return;
982
983 if (nentries < 0 ||
984 nentries > INT_MAX-info_ptr->splt_palettes_num ||
985 (unsigned int)/*SAFE*/(nentries +/*SAFE*/
986 info_ptr->splt_palettes_num) >=
987 PNG_SIZE_MAX/png_sizeof(png_sPLT_t))
988 np=NULL;
989
990 else
991
992 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
993 (info_ptr->splt_palettes_num + nentries) *
994 (png_size_t)png_sizeof(png_sPLT_t));
995
996 if (np == NULL)
997 {
998 png_warning(png_ptr, "No memory for sPLT palettes");
999 return;
1000 }
1001
1002 png_memcpy(np, info_ptr->splt_palettes,
1003 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
1004
1005 png_free(png_ptr, info_ptr->splt_palettes);
1006 info_ptr->splt_palettes=NULL;
1007
1008 for (i = 0; i < nentries; i++)
1009 {
1010 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
1011 png_const_sPLT_tp from = entries + i;
1012 png_size_t length;
1013
1014 length = png_strlen(from->name) + 1;
1015 to->name = (png_charp)png_malloc_warn(png_ptr, length);
1016
1017 if (to->name == NULL)
1018 {
1019 png_warning(png_ptr,
1020 "Out of memory while processing sPLT chunk");
1021 continue;
1022 }
1023
1024 png_memcpy(to->name, from->name, length);
1025 to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
1026 from->nentries * png_sizeof(png_sPLT_entry));
1027
1028 if (to->entries == NULL)
1029 {
1030 png_warning(png_ptr,
1031 "Out of memory while processing sPLT chunk");
1032 png_free(png_ptr, to->name);
1033 to->name = NULL;
1034 continue;
1035 }
1036
1037 png_memcpy(to->entries, from->entries,
1038 from->nentries * png_sizeof(png_sPLT_entry));
1039
1040 to->nentries = from->nentries;
1041 to->depth = from->depth;
1042 }
1043
1044 info_ptr->splt_palettes = np;
1045 info_ptr->splt_palettes_num += nentries;
1046 info_ptr->valid |= PNG_INFO_sPLT;
1047 info_ptr->free_me |= PNG_FREE_SPLT;
1048 }
1049 #endif /* PNG_sPLT_SUPPORTED */
1050
1051 #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
1052 void PNGAPI
1053 png_set_unknown_chunks(png_structp png_ptr,
1054 png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
1055 {
1056 png_unknown_chunkp np;
1057 int i;
1058
1059 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
1060 return;
1061
1062 if (num_unknowns < 0 ||
1063 num_unknowns > INT_MAX-info_ptr->unknown_chunks_num ||
1064 (unsigned int)/*SAFE*/(num_unknowns +/*SAFE*/
1065 info_ptr->unknown_chunks_num) >=
1066 PNG_SIZE_MAX/png_sizeof(png_unknown_chunk))
1067 np=NULL;
1068
1069 else
1070 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
1071 (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
1072 png_sizeof(png_unknown_chunk));
1073
1074 if (np == NULL)
1075 {
1076 png_warning(png_ptr,
1077 "Out of memory while processing unknown chunk");
1078 return;
1079 }
1080
1081 png_memcpy(np, info_ptr->unknown_chunks,
1082 (png_size_t)info_ptr->unknown_chunks_num *
1083 png_sizeof(png_unknown_chunk));
1084
1085 png_free(png_ptr, info_ptr->unknown_chunks);
1086 info_ptr->unknown_chunks = NULL;
1087
1088 for (i = 0; i < num_unknowns; i++)
1089 {
1090 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
1091 png_const_unknown_chunkp from = unknowns + i;
1092
1093 png_memcpy(to->name, from->name, png_sizeof(from->name));
1094 to->name[png_sizeof(to->name)-1] = '\0';
1095 to->size = from->size;
1096
1097 /* Note our location in the read or write sequence */
1098 to->location = (png_byte)(png_ptr->mode & 0xff);
1099
1100 if (from->size == 0)
1101 to->data=NULL;
1102
1103 else
1104 {
1105 to->data = (png_bytep)png_malloc_warn(png_ptr,
1106 (png_size_t)from->size);
1107
1108 if (to->data == NULL)
1109 {
1110 png_warning(png_ptr,
1111 "Out of memory while processing unknown chunk");
1112 to->size = 0;
1113 }
1114
1115 else
1116 png_memcpy(to->data, from->data, from->size);
1117 }
1118 }
1119
1120 info_ptr->unknown_chunks = np;
1121 info_ptr->unknown_chunks_num += num_unknowns;
1122 info_ptr->free_me |= PNG_FREE_UNKN;
1123 }
1124
1125 void PNGAPI
1126 png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1127 int chunk, int location)
1128 {
1129 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1130 info_ptr->unknown_chunks_num)
1131 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1132 }
1133 #endif
1134
1135
1136 #ifdef PNG_MNG_FEATURES_SUPPORTED
1137 png_uint_32 PNGAPI
1138 png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1139 {
1140 png_debug(1, "in png_permit_mng_features");
1141
1142 if (png_ptr == NULL)
1143 return (png_uint_32)0;
1144
1145 png_ptr->mng_features_permitted =
1146 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1147
1148 return (png_uint_32)png_ptr->mng_features_permitted;
1149 }
1150 #endif
1151
1152 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1153 void PNGAPI
1154 png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep
1155 chunk_list, int num_chunks)
1156 {
1157 png_bytep new_list, p;
1158 int i, old_num_chunks;
1159 if (png_ptr == NULL)
1160 return;
1161
1162 if (num_chunks == 0)
1163 {
1164 if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1165 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1166
1167 else
1168 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1169
1170 if (keep == PNG_HANDLE_CHUNK_ALWAYS)
1171 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1172
1173 else
1174 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1175
1176 return;
1177 }
1178
1179 if (chunk_list == NULL)
1180 return;
1181
1182 old_num_chunks = png_ptr->num_chunk_list;
1183 new_list=(png_bytep)png_malloc(png_ptr,
1184 (png_size_t)(5*(num_chunks + old_num_chunks)));
1185
1186 if (png_ptr->chunk_list != NULL)
1187 {
1188 png_memcpy(new_list, png_ptr->chunk_list,
1189 (png_size_t)(5*old_num_chunks));
1190 png_free(png_ptr, png_ptr->chunk_list);
1191 png_ptr->chunk_list=NULL;
1192 }
1193
1194 png_memcpy(new_list + 5*old_num_chunks, chunk_list,
1195 (png_size_t)(5*num_chunks));
1196
1197 for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
1198 *p=(png_byte)keep;
1199
1200 png_ptr->num_chunk_list = old_num_chunks + num_chunks;
1201 png_ptr->chunk_list = new_list;
1202 png_ptr->free_me |= PNG_FREE_LIST;
1203 }
1204 #endif
1205
1206 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1207 void PNGAPI
1208 png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1209 png_user_chunk_ptr read_user_chunk_fn)
1210 {
1211 png_debug(1, "in png_set_read_user_chunk_fn");
1212
1213 if (png_ptr == NULL)
1214 return;
1215
1216 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1217 png_ptr->user_chunk_ptr = user_chunk_ptr;
1218 }
1219 #endif
1220
1221 #ifdef PNG_INFO_IMAGE_SUPPORTED
1222 void PNGAPI
1223 png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1224 {
1225 png_debug1(1, "in %s storage function", "rows");
1226
1227 if (png_ptr == NULL || info_ptr == NULL)
1228 return;
1229
1230 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1231 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1232
1233 info_ptr->row_pointers = row_pointers;
1234
1235 if (row_pointers)
1236 info_ptr->valid |= PNG_INFO_IDAT;
1237 }
1238 #endif
1239
1240 void PNGAPI
1241 png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
1242 {
1243 if (png_ptr == NULL)
1244 return;
1245
1246 png_free(png_ptr, png_ptr->zbuf);
1247
1248 if (size > ZLIB_IO_MAX)
1249 {
1250 png_warning(png_ptr, "Attempt to set buffer size beyond max ignored");
1251 png_ptr->zbuf_size = ZLIB_IO_MAX;
1252 size = ZLIB_IO_MAX; /* must fit */
1253 }
1254
1255 else
1256 png_ptr->zbuf_size = (uInt)size;
1257
1258 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1259
1260 /* The following ensures a relatively safe failure if this gets called while
1261 * the buffer is actually in use.
1262 */
1263 png_ptr->zstream.next_out = png_ptr->zbuf;
1264 png_ptr->zstream.avail_out = 0;
1265 png_ptr->zstream.avail_in = 0;
1266 }
1267
1268 void PNGAPI
1269 png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1270 {
1271 if (png_ptr && info_ptr)
1272 info_ptr->valid &= ~mask;
1273 }
1274
1275
1276
1277 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
1278 /* This function was added to libpng 1.2.6 */
1279 void PNGAPI
1280 png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1281 png_uint_32 user_height_max)
1282 {
1283 /* Images with dimensions larger than these limits will be
1284 * rejected by png_set_IHDR(). To accept any PNG datastream
1285 * regardless of dimensions, set both limits to 0x7ffffffL.
1286 */
1287 if (png_ptr == NULL)
1288 return;
1289
1290 png_ptr->user_width_max = user_width_max;
1291 png_ptr->user_height_max = user_height_max;
1292 }
1293
1294 /* This function was added to libpng 1.4.0 */
1295 void PNGAPI
1296 png_set_chunk_cache_max (png_structp png_ptr,
1297 png_uint_32 user_chunk_cache_max)
1298 {
1299 if (png_ptr)
1300 png_ptr->user_chunk_cache_max = user_chunk_cache_max;
1301 }
1302
1303 /* This function was added to libpng 1.4.1 */
1304 void PNGAPI
1305 png_set_chunk_malloc_max (png_structp png_ptr,
1306 png_alloc_size_t user_chunk_malloc_max)
1307 {
1308 if (png_ptr)
1309 png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
1310 }
1311 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1312
1313
1314 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
1315 void PNGAPI
1316 png_set_benign_errors(png_structp png_ptr, int allowed)
1317 {
1318 png_debug(1, "in png_set_benign_errors");
1319
1320 if (allowed)
1321 png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
1322
1323 else
1324 png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
1325 }
1326 #endif /* PNG_BENIGN_ERRORS_SUPPORTED */
1327
1328 #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
1329 /* Whether to report invalid palette index; added at libng-1.5.10
1330 * allowed - one of 0: disable; 1: enable
1331 */
1332 void PNGAPI
1333 png_set_check_for_invalid_index(png_structp png_ptr, int allowed)
1334 {
1335 png_debug(1, "in png_set_check_for_invalid_index");
1336
1337 if (allowed)
1338 png_ptr->num_palette_max = 0;
1339
1340 else
1341 png_ptr->num_palette_max = -1;
1342 }
1343 #endif
1344
1345 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */