]> git.saurik.com Git - wxWidgets.git/blame_incremental - src/png/pngset.c
projects / wxWidgets.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
Compilation fix - wx/vector.h is not part of PCH.
[wxWidgets.git] / src / png / pngset.c
... / ...
CommitLineData
1
2/* pngset.c - storage of image information into info struct
3 *
4 * Last changed in libpng 1.5.7 [December 15, 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
24void PNGAPI
25png_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
39void PNGFAPI
40png_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
67void PNGFAPI
68png_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
101void PNGAPI
102png_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
117void PNGAPI
118png_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
138void PNGFAPI
139png_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 gammma 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
166void PNGAPI
167png_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
176void PNGAPI
177png_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
218void PNGAPI
219png_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
268void PNGAPI
269png_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
285void PNGAPI
286png_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
377void PNGAPI
378png_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
440void PNGAPI
441png_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
470void PNGAPI
471png_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
499void PNGAPI
500png_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
515void PNGAPI
516png_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
560void PNGAPI
561png_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
575void PNGAPI
576png_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
587void PNGAPI
588png_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
616void PNGAPI
617png_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
667void PNGAPI
668png_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
678int /* PRIVATE */
679png_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 if (info_ptr->num_text + num_text > info_ptr->max_text)
694 {
695 if (info_ptr->text != NULL)
696 {
697 png_textp old_text;
698 int old_max;
699
700 old_max = info_ptr->max_text;
701 info_ptr->max_text = info_ptr->num_text + num_text + 8;
702 old_text = info_ptr->text;
703 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
704 (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
705
706 if (info_ptr->text == NULL)
707 {
708 png_free(png_ptr, old_text);
709 return(1);
710 }
711
712 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
713 png_sizeof(png_text)));
714 png_free(png_ptr, old_text);
715 }
716
717 else
718 {
719 info_ptr->max_text = num_text + 8;
720 info_ptr->num_text = 0;
721 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
722 (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
723 if (info_ptr->text == NULL)
724 return(1);
725 info_ptr->free_me |= PNG_FREE_TEXT;
726 }
727
728 png_debug1(3, "allocated %d entries for info_ptr->text",
729 info_ptr->max_text);
730 }
731 for (i = 0; i < num_text; i++)
732 {
733 png_size_t text_length, key_len;
734 png_size_t lang_len, lang_key_len;
735 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
736
737 if (text_ptr[i].key == NULL)
738 continue;
739
740 if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
741 text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
742 {
743 png_warning(png_ptr, "text compression mode is out of range");
744 continue;
745 }
746
747 key_len = png_strlen(text_ptr[i].key);
748
749 if (text_ptr[i].compression <= 0)
750 {
751 lang_len = 0;
752 lang_key_len = 0;
753 }
754
755 else
756# ifdef PNG_iTXt_SUPPORTED
757 {
758 /* Set iTXt data */
759
760 if (text_ptr[i].lang != NULL)
761 lang_len = png_strlen(text_ptr[i].lang);
762
763 else
764 lang_len = 0;
765
766 if (text_ptr[i].lang_key != NULL)
767 lang_key_len = png_strlen(text_ptr[i].lang_key);
768
769 else
770 lang_key_len = 0;
771 }
772# else /* PNG_iTXt_SUPPORTED */
773 {
774 png_warning(png_ptr, "iTXt chunk not supported");
775 continue;
776 }
777# endif
778
779 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
780 {
781 text_length = 0;
782# ifdef PNG_iTXt_SUPPORTED
783 if (text_ptr[i].compression > 0)
784 textp->compression = PNG_ITXT_COMPRESSION_NONE;
785
786 else
787# endif
788 textp->compression = PNG_TEXT_COMPRESSION_NONE;
789 }
790
791 else
792 {
793 text_length = png_strlen(text_ptr[i].text);
794 textp->compression = text_ptr[i].compression;
795 }
796
797 textp->key = (png_charp)png_malloc_warn(png_ptr,
798 (png_size_t)
799 (key_len + text_length + lang_len + lang_key_len + 4));
800
801 if (textp->key == NULL)
802 return(1);
803
804 png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
805 (unsigned long)(png_uint_32)
806 (key_len + lang_len + lang_key_len + text_length + 4),
807 textp->key);
808
809 png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
810 *(textp->key + key_len) = '\0';
811
812 if (text_ptr[i].compression > 0)
813 {
814 textp->lang = textp->key + key_len + 1;
815 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
816 *(textp->lang + lang_len) = '\0';
817 textp->lang_key = textp->lang + lang_len + 1;
818 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
819 *(textp->lang_key + lang_key_len) = '\0';
820 textp->text = textp->lang_key + lang_key_len + 1;
821 }
822
823 else
824 {
825 textp->lang=NULL;
826 textp->lang_key=NULL;
827 textp->text = textp->key + key_len + 1;
828 }
829
830 if (text_length)
831 png_memcpy(textp->text, text_ptr[i].text,
832 (png_size_t)(text_length));
833
834 *(textp->text + text_length) = '\0';
835
836# ifdef PNG_iTXt_SUPPORTED
837 if (textp->compression > 0)
838 {
839 textp->text_length = 0;
840 textp->itxt_length = text_length;
841 }
842
843 else
844# endif
845 {
846 textp->text_length = text_length;
847 textp->itxt_length = 0;
848 }
849
850 info_ptr->num_text++;
851 png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
852 }
853 return(0);
854}
855#endif
856
857#ifdef PNG_tIME_SUPPORTED
858void PNGAPI
859png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
860{
861 png_debug1(1, "in %s storage function", "tIME");
862
863 if (png_ptr == NULL || info_ptr == NULL ||
864 (png_ptr->mode & PNG_WROTE_tIME))
865 return;
866
867 if (mod_time->month == 0 || mod_time->month > 12 ||
868 mod_time->day == 0 || mod_time->day > 31 ||
869 mod_time->hour > 23 || mod_time->minute > 59 ||
870 mod_time->second > 60)
871 {
872 png_warning(png_ptr, "Ignoring invalid time value");
873 return;
874 }
875
876 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
877 info_ptr->valid |= PNG_INFO_tIME;
878}
879#endif
880
881#ifdef PNG_tRNS_SUPPORTED
882void PNGAPI
883png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
884 png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
885{
886 png_debug1(1, "in %s storage function", "tRNS");
887
888 if (png_ptr == NULL || info_ptr == NULL)
889 return;
890
891 if (trans_alpha != NULL)
892 {
893 /* It may not actually be necessary to set png_ptr->trans_alpha here;
894 * we do it for backward compatibility with the way the png_handle_tRNS
895 * function used to do the allocation.
896 */
897
898 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
899
900 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
901 png_ptr->trans_alpha = info_ptr->trans_alpha =
902 (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH);
903
904 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
905 png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
906 }
907
908 if (trans_color != NULL)
909 {
910 int sample_max = (1 << info_ptr->bit_depth);
911
912 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
913 (int)trans_color->gray > sample_max) ||
914 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
915 ((int)trans_color->red > sample_max ||
916 (int)trans_color->green > sample_max ||
917 (int)trans_color->blue > sample_max)))
918 png_warning(png_ptr,
919 "tRNS chunk has out-of-range samples for bit_depth");
920
921 png_memcpy(&(info_ptr->trans_color), trans_color,
922 png_sizeof(png_color_16));
923
924 if (num_trans == 0)
925 num_trans = 1;
926 }
927
928 info_ptr->num_trans = (png_uint_16)num_trans;
929
930 if (num_trans != 0)
931 {
932 info_ptr->valid |= PNG_INFO_tRNS;
933 info_ptr->free_me |= PNG_FREE_TRNS;
934 }
935}
936#endif
937
938#ifdef PNG_sPLT_SUPPORTED
939void PNGAPI
940png_set_sPLT(png_structp png_ptr,
941 png_infop info_ptr, png_const_sPLT_tp entries, int nentries)
942/*
943 * entries - array of png_sPLT_t structures
944 * to be added to the list of palettes
945 * in the info structure.
946 *
947 * nentries - number of palette structures to be
948 * added.
949 */
950{
951 png_sPLT_tp np;
952 int i;
953
954 if (png_ptr == NULL || info_ptr == NULL)
955 return;
956
957 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
958 (info_ptr->splt_palettes_num + nentries) *
959 (png_size_t)png_sizeof(png_sPLT_t));
960
961 if (np == NULL)
962 {
963 png_warning(png_ptr, "No memory for sPLT palettes");
964 return;
965 }
966
967 png_memcpy(np, info_ptr->splt_palettes,
968 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
969
970 png_free(png_ptr, info_ptr->splt_palettes);
971 info_ptr->splt_palettes=NULL;
972
973 for (i = 0; i < nentries; i++)
974 {
975 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
976 png_const_sPLT_tp from = entries + i;
977 png_size_t length;
978
979 length = png_strlen(from->name) + 1;
980 to->name = (png_charp)png_malloc_warn(png_ptr, length);
981
982 if (to->name == NULL)
983 {
984 png_warning(png_ptr,
985 "Out of memory while processing sPLT chunk");
986 continue;
987 }
988
989 png_memcpy(to->name, from->name, length);
990 to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
991 from->nentries * png_sizeof(png_sPLT_entry));
992
993 if (to->entries == NULL)
994 {
995 png_warning(png_ptr,
996 "Out of memory while processing sPLT chunk");
997 png_free(png_ptr, to->name);
998 to->name = NULL;
999 continue;
1000 }
1001
1002 png_memcpy(to->entries, from->entries,
1003 from->nentries * png_sizeof(png_sPLT_entry));
1004
1005 to->nentries = from->nentries;
1006 to->depth = from->depth;
1007 }
1008
1009 info_ptr->splt_palettes = np;
1010 info_ptr->splt_palettes_num += nentries;
1011 info_ptr->valid |= PNG_INFO_sPLT;
1012 info_ptr->free_me |= PNG_FREE_SPLT;
1013}
1014#endif /* PNG_sPLT_SUPPORTED */
1015
1016#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
1017void PNGAPI
1018png_set_unknown_chunks(png_structp png_ptr,
1019 png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
1020{
1021 png_unknown_chunkp np;
1022 int i;
1023
1024 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
1025 return;
1026
1027 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
1028 (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
1029 png_sizeof(png_unknown_chunk));
1030
1031 if (np == NULL)
1032 {
1033 png_warning(png_ptr,
1034 "Out of memory while processing unknown chunk");
1035 return;
1036 }
1037
1038 png_memcpy(np, info_ptr->unknown_chunks,
1039 (png_size_t)info_ptr->unknown_chunks_num *
1040 png_sizeof(png_unknown_chunk));
1041
1042 png_free(png_ptr, info_ptr->unknown_chunks);
1043 info_ptr->unknown_chunks = NULL;
1044
1045 for (i = 0; i < num_unknowns; i++)
1046 {
1047 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
1048 png_const_unknown_chunkp from = unknowns + i;
1049
1050 png_memcpy(to->name, from->name, png_sizeof(from->name));
1051 to->name[png_sizeof(to->name)-1] = '\0';
1052 to->size = from->size;
1053
1054 /* Note our location in the read or write sequence */
1055 to->location = (png_byte)(png_ptr->mode & 0xff);
1056
1057 if (from->size == 0)
1058 to->data=NULL;
1059
1060 else
1061 {
1062 to->data = (png_bytep)png_malloc_warn(png_ptr,
1063 (png_size_t)from->size);
1064
1065 if (to->data == NULL)
1066 {
1067 png_warning(png_ptr,
1068 "Out of memory while processing unknown chunk");
1069 to->size = 0;
1070 }
1071
1072 else
1073 png_memcpy(to->data, from->data, from->size);
1074 }
1075 }
1076
1077 info_ptr->unknown_chunks = np;
1078 info_ptr->unknown_chunks_num += num_unknowns;
1079 info_ptr->free_me |= PNG_FREE_UNKN;
1080}
1081
1082void PNGAPI
1083png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1084 int chunk, int location)
1085{
1086 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1087 info_ptr->unknown_chunks_num)
1088 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1089}
1090#endif
1091
1092
1093#ifdef PNG_MNG_FEATURES_SUPPORTED
1094png_uint_32 PNGAPI
1095png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1096{
1097 png_debug(1, "in png_permit_mng_features");
1098
1099 if (png_ptr == NULL)
1100 return (png_uint_32)0;
1101
1102 png_ptr->mng_features_permitted =
1103 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1104
1105 return (png_uint_32)png_ptr->mng_features_permitted;
1106}
1107#endif
1108
1109#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1110void PNGAPI
1111png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep
1112 chunk_list, int num_chunks)
1113{
1114 png_bytep new_list, p;
1115 int i, old_num_chunks;
1116 if (png_ptr == NULL)
1117 return;
1118
1119 if (num_chunks == 0)
1120 {
1121 if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1122 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1123
1124 else
1125 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1126
1127 if (keep == PNG_HANDLE_CHUNK_ALWAYS)
1128 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1129
1130 else
1131 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1132
1133 return;
1134 }
1135
1136 if (chunk_list == NULL)
1137 return;
1138
1139 old_num_chunks = png_ptr->num_chunk_list;
1140 new_list=(png_bytep)png_malloc(png_ptr,
1141 (png_size_t)(5*(num_chunks + old_num_chunks)));
1142
1143 if (png_ptr->chunk_list != NULL)
1144 {
1145 png_memcpy(new_list, png_ptr->chunk_list,
1146 (png_size_t)(5*old_num_chunks));
1147 png_free(png_ptr, png_ptr->chunk_list);
1148 png_ptr->chunk_list=NULL;
1149 }
1150
1151 png_memcpy(new_list + 5*old_num_chunks, chunk_list,
1152 (png_size_t)(5*num_chunks));
1153
1154 for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
1155 *p=(png_byte)keep;
1156
1157 png_ptr->num_chunk_list = old_num_chunks + num_chunks;
1158 png_ptr->chunk_list = new_list;
1159 png_ptr->free_me |= PNG_FREE_LIST;
1160}
1161#endif
1162
1163#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1164void PNGAPI
1165png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1166 png_user_chunk_ptr read_user_chunk_fn)
1167{
1168 png_debug(1, "in png_set_read_user_chunk_fn");
1169
1170 if (png_ptr == NULL)
1171 return;
1172
1173 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1174 png_ptr->user_chunk_ptr = user_chunk_ptr;
1175}
1176#endif
1177
1178#ifdef PNG_INFO_IMAGE_SUPPORTED
1179void PNGAPI
1180png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1181{
1182 png_debug1(1, "in %s storage function", "rows");
1183
1184 if (png_ptr == NULL || info_ptr == NULL)
1185 return;
1186
1187 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1188 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1189
1190 info_ptr->row_pointers = row_pointers;
1191
1192 if (row_pointers)
1193 info_ptr->valid |= PNG_INFO_IDAT;
1194}
1195#endif
1196
1197void PNGAPI
1198png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
1199{
1200 if (png_ptr == NULL)
1201 return;
1202
1203 png_free(png_ptr, png_ptr->zbuf);
1204
1205 if (size > ZLIB_IO_MAX)
1206 {
1207 png_warning(png_ptr, "Attempt to set buffer size beyond max ignored");
1208 png_ptr->zbuf_size = ZLIB_IO_MAX;
1209 size = ZLIB_IO_MAX; /* must fit */
1210 }
1211
1212 else
1213 png_ptr->zbuf_size = (uInt)size;
1214
1215 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1216
1217 /* The following ensures a relatively safe failure if this gets called while
1218 * the buffer is actually in use.
1219 */
1220 png_ptr->zstream.next_out = png_ptr->zbuf;
1221 png_ptr->zstream.avail_out = 0;
1222 png_ptr->zstream.avail_in = 0;
1223}
1224
1225void PNGAPI
1226png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1227{
1228 if (png_ptr && info_ptr)
1229 info_ptr->valid &= ~mask;
1230}
1231
1232
1233
1234#ifdef PNG_SET_USER_LIMITS_SUPPORTED
1235/* This function was added to libpng 1.2.6 */
1236void PNGAPI
1237png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1238 png_uint_32 user_height_max)
1239{
1240 /* Images with dimensions larger than these limits will be
1241 * rejected by png_set_IHDR(). To accept any PNG datastream
1242 * regardless of dimensions, set both limits to 0x7ffffffL.
1243 */
1244 if (png_ptr == NULL)
1245 return;
1246
1247 png_ptr->user_width_max = user_width_max;
1248 png_ptr->user_height_max = user_height_max;
1249}
1250
1251/* This function was added to libpng 1.4.0 */
1252void PNGAPI
1253png_set_chunk_cache_max (png_structp png_ptr,
1254 png_uint_32 user_chunk_cache_max)
1255{
1256 if (png_ptr)
1257 png_ptr->user_chunk_cache_max = user_chunk_cache_max;
1258}
1259
1260/* This function was added to libpng 1.4.1 */
1261void PNGAPI
1262png_set_chunk_malloc_max (png_structp png_ptr,
1263 png_alloc_size_t user_chunk_malloc_max)
1264{
1265 if (png_ptr)
1266 png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
1267}
1268#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1269
1270
1271#ifdef PNG_BENIGN_ERRORS_SUPPORTED
1272void PNGAPI
1273png_set_benign_errors(png_structp png_ptr, int allowed)
1274{
1275 png_debug(1, "in png_set_benign_errors");
1276
1277 if (allowed)
1278 png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
1279
1280 else
1281 png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
1282}
1283#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
1284#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
wxWidgets (Impactor)