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1
2/* pngset.c - storage of image information into info struct
3 *
4 * libpng 1.2.7 - September 12, 2004
5 * For conditions of distribution and use, see copyright notice in png.h
6 * Copyright (c) 1998-2004 Glenn Randers-Pehrson
7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
9 *
10 * The functions here are used during reads to store data from the file
11 * into the info struct, and during writes to store application data
12 * into the info struct for writing into the file. This abstracts the
13 * info struct and allows us to change the structure in the future.
14 */
15
16#define PNG_INTERNAL
17#include "png.h"
18
19#if defined(PNG_bKGD_SUPPORTED)
20void PNGAPI
21png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
22{
23 png_debug1(1, "in %s storage function\n", "bKGD");
24 if (png_ptr == NULL || info_ptr == NULL)
25 return;
26
27 png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
28 info_ptr->valid |= PNG_INFO_bKGD;
29}
30#endif
31
32#if defined(PNG_cHRM_SUPPORTED)
33#ifdef PNG_FLOATING_POINT_SUPPORTED
34void PNGAPI
35png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
36 double white_x, double white_y, double red_x, double red_y,
37 double green_x, double green_y, double blue_x, double blue_y)
38{
39 png_debug1(1, "in %s storage function\n", "cHRM");
40 if (png_ptr == NULL || info_ptr == NULL)
41 return;
42
43 if (white_x < 0.0 || white_y < 0.0 ||
44 red_x < 0.0 || red_y < 0.0 ||
45 green_x < 0.0 || green_y < 0.0 ||
46 blue_x < 0.0 || blue_y < 0.0)
47 {
48 png_warning(png_ptr,
49 "Ignoring attempt to set negative chromaticity value");
50 return;
51 }
52 if (white_x > 21474.83 || white_y > 21474.83 ||
53 red_x > 21474.83 || red_y > 21474.83 ||
54 green_x > 21474.83 || green_y > 21474.83 ||
55 blue_x > 21474.83 || blue_y > 21474.83)
56 {
57 png_warning(png_ptr,
58 "Ignoring attempt to set chromaticity value exceeding 21474.83");
59 return;
60 }
61
62 info_ptr->x_white = (float)white_x;
63 info_ptr->y_white = (float)white_y;
64 info_ptr->x_red = (float)red_x;
65 info_ptr->y_red = (float)red_y;
66 info_ptr->x_green = (float)green_x;
67 info_ptr->y_green = (float)green_y;
68 info_ptr->x_blue = (float)blue_x;
69 info_ptr->y_blue = (float)blue_y;
70#ifdef PNG_FIXED_POINT_SUPPORTED
71 info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
72 info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
73 info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
74 info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
75 info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
76 info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
77 info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
78 info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
79#endif
80 info_ptr->valid |= PNG_INFO_cHRM;
81}
82#endif
83#ifdef PNG_FIXED_POINT_SUPPORTED
84void PNGAPI
85png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
86 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
87 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
88 png_fixed_point blue_x, png_fixed_point blue_y)
89{
90 png_debug1(1, "in %s storage function\n", "cHRM");
91 if (png_ptr == NULL || info_ptr == NULL)
92 return;
93
94 if (white_x < 0 || white_y < 0 ||
95 red_x < 0 || red_y < 0 ||
96 green_x < 0 || green_y < 0 ||
97 blue_x < 0 || blue_y < 0)
98 {
99 png_warning(png_ptr,
100 "Ignoring attempt to set negative chromaticity value");
101 return;
102 }
103 if (white_x > (double) PNG_UINT_31_MAX ||
104 white_y > (double) PNG_UINT_31_MAX ||
105 red_x > (double) PNG_UINT_31_MAX ||
106 red_y > (double) PNG_UINT_31_MAX ||
107 green_x > (double) PNG_UINT_31_MAX ||
108 green_y > (double) PNG_UINT_31_MAX ||
109 blue_x > (double) PNG_UINT_31_MAX ||
110 blue_y > (double) PNG_UINT_31_MAX)
111 {
112 png_warning(png_ptr,
113 "Ignoring attempt to set chromaticity value exceeding 21474.83");
114 return;
115 }
116 info_ptr->int_x_white = white_x;
117 info_ptr->int_y_white = white_y;
118 info_ptr->int_x_red = red_x;
119 info_ptr->int_y_red = red_y;
120 info_ptr->int_x_green = green_x;
121 info_ptr->int_y_green = green_y;
122 info_ptr->int_x_blue = blue_x;
123 info_ptr->int_y_blue = blue_y;
124#ifdef PNG_FLOATING_POINT_SUPPORTED
125 info_ptr->x_white = (float)(white_x/100000.);
126 info_ptr->y_white = (float)(white_y/100000.);
127 info_ptr->x_red = (float)( red_x/100000.);
128 info_ptr->y_red = (float)( red_y/100000.);
129 info_ptr->x_green = (float)(green_x/100000.);
130 info_ptr->y_green = (float)(green_y/100000.);
131 info_ptr->x_blue = (float)( blue_x/100000.);
132 info_ptr->y_blue = (float)( blue_y/100000.);
133#endif
134 info_ptr->valid |= PNG_INFO_cHRM;
135}
136#endif
137#endif
138
139#if defined(PNG_gAMA_SUPPORTED)
140#ifdef PNG_FLOATING_POINT_SUPPORTED
141void PNGAPI
142png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
143{
144 double gamma;
145 png_debug1(1, "in %s storage function\n", "gAMA");
146 if (png_ptr == NULL || info_ptr == NULL)
147 return;
148
149 /* Check for overflow */
150 if (file_gamma > 21474.83)
151 {
152 png_warning(png_ptr, "Limiting gamma to 21474.83");
153 gamma=21474.83;
154 }
155 else
156 gamma=file_gamma;
157 info_ptr->gamma = (float)gamma;
158#ifdef PNG_FIXED_POINT_SUPPORTED
159 info_ptr->int_gamma = (int)(gamma*100000.+.5);
160#endif
161 info_ptr->valid |= PNG_INFO_gAMA;
162 if(gamma == 0.0)
163 png_warning(png_ptr, "Setting gamma=0");
164}
165#endif
166void PNGAPI
167png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
168 int_gamma)
169{
170 png_fixed_point gamma;
171
172 png_debug1(1, "in %s storage function\n", "gAMA");
173 if (png_ptr == NULL || info_ptr == NULL)
174 return;
175
176 if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
177 {
178 png_warning(png_ptr, "Limiting gamma to 21474.83");
179 gamma=PNG_UINT_31_MAX;
180 }
181 else
182 {
183 if (int_gamma < 0)
184 {
185 png_warning(png_ptr, "Setting negative gamma to zero");
186 gamma=0;
187 }
188 else
189 gamma=int_gamma;
190 }
191#ifdef PNG_FLOATING_POINT_SUPPORTED
192 info_ptr->gamma = (float)(gamma/100000.);
193#endif
194#ifdef PNG_FIXED_POINT_SUPPORTED
195 info_ptr->int_gamma = gamma;
196#endif
197 info_ptr->valid |= PNG_INFO_gAMA;
198 if(gamma == 0)
199 png_warning(png_ptr, "Setting gamma=0");
200}
201#endif
202
203#if defined(PNG_hIST_SUPPORTED)
204void PNGAPI
205png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
206{
207 int i;
208
209 png_debug1(1, "in %s storage function\n", "hIST");
210 if (png_ptr == NULL || info_ptr == NULL)
211 return;
212 if (info_ptr->num_palette == 0)
213 {
214 png_warning(png_ptr,
215 "Palette size 0, hIST allocation skipped.");
216 return;
217 }
218
219#ifdef PNG_FREE_ME_SUPPORTED
220 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
221#endif
222 /* Changed from info->num_palette to 256 in version 1.2.1 */
223 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
224 (png_uint_32)(256 * png_sizeof (png_uint_16)));
225 if (png_ptr->hist == NULL)
226 {
227 png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
228 return;
229 }
230
231 for (i = 0; i < info_ptr->num_palette; i++)
232 png_ptr->hist[i] = hist[i];
233 info_ptr->hist = png_ptr->hist;
234 info_ptr->valid |= PNG_INFO_hIST;
235
236#ifdef PNG_FREE_ME_SUPPORTED
237 info_ptr->free_me |= PNG_FREE_HIST;
238#else
239 png_ptr->flags |= PNG_FLAG_FREE_HIST;
240#endif
241}
242#endif
243
244void PNGAPI
245png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
246 png_uint_32 width, png_uint_32 height, int bit_depth,
247 int color_type, int interlace_type, int compression_type,
248 int filter_type)
249{
250 png_debug1(1, "in %s storage function\n", "IHDR");
251 if (png_ptr == NULL || info_ptr == NULL)
252 return;
253
254 /* check for width and height valid values */
255 if (width == 0 || height == 0)
256 png_error(png_ptr, "Image width or height is zero in IHDR");
257#ifdef PNG_SET_USER_LIMITS_SUPPORTED
258 if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
259 png_error(png_ptr, "image size exceeds user limits in IHDR");
260#else
261 if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
262 png_error(png_ptr, "image size exceeds user limits in IHDR");
263#endif
264 if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
265 png_error(png_ptr, "Invalid image size in IHDR");
266 if ( width > (PNG_UINT_32_MAX
267 >> 3) /* 8-byte RGBA pixels */
268 - 64 /* bigrowbuf hack */
269 - 1 /* filter byte */
270 - 7*8 /* rounding of width to multiple of 8 pixels */
271 - 8) /* extra max_pixel_depth pad */
272 png_warning(png_ptr, "Width is too large for libpng to process pixels");
273
274 /* check other values */
275 if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
276 bit_depth != 8 && bit_depth != 16)
277 png_error(png_ptr, "Invalid bit depth in IHDR");
278
279 if (color_type < 0 || color_type == 1 ||
280 color_type == 5 || color_type > 6)
281 png_error(png_ptr, "Invalid color type in IHDR");
282
283 if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
284 ((color_type == PNG_COLOR_TYPE_RGB ||
285 color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
286 color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
287 png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
288
289 if (interlace_type >= PNG_INTERLACE_LAST)
290 png_error(png_ptr, "Unknown interlace method in IHDR");
291
292 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
293 png_error(png_ptr, "Unknown compression method in IHDR");
294
295#if defined(PNG_MNG_FEATURES_SUPPORTED)
296 /* Accept filter_method 64 (intrapixel differencing) only if
297 * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
298 * 2. Libpng did not read a PNG signature (this filter_method is only
299 * used in PNG datastreams that are embedded in MNG datastreams) and
300 * 3. The application called png_permit_mng_features with a mask that
301 * included PNG_FLAG_MNG_FILTER_64 and
302 * 4. The filter_method is 64 and
303 * 5. The color_type is RGB or RGBA
304 */
305 if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
306 png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
307 if(filter_type != PNG_FILTER_TYPE_BASE)
308 {
309 if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
310 (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
311 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
312 (color_type == PNG_COLOR_TYPE_RGB ||
313 color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
314 png_error(png_ptr, "Unknown filter method in IHDR");
315 if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
316 png_warning(png_ptr, "Invalid filter method in IHDR");
317 }
318#else
319 if(filter_type != PNG_FILTER_TYPE_BASE)
320 png_error(png_ptr, "Unknown filter method in IHDR");
321#endif
322
323 info_ptr->width = width;
324 info_ptr->height = height;
325 info_ptr->bit_depth = (png_byte)bit_depth;
326 info_ptr->color_type =(png_byte) color_type;
327 info_ptr->compression_type = (png_byte)compression_type;
328 info_ptr->filter_type = (png_byte)filter_type;
329 info_ptr->interlace_type = (png_byte)interlace_type;
330 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
331 info_ptr->channels = 1;
332 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
333 info_ptr->channels = 3;
334 else
335 info_ptr->channels = 1;
336 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
337 info_ptr->channels++;
338 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
339
340 /* check for potential overflow */
341 if ( width > (PNG_UINT_32_MAX
342 >> 3) /* 8-byte RGBA pixels */
343 - 64 /* bigrowbuf hack */
344 - 1 /* filter byte */
345 - 7*8 /* rounding of width to multiple of 8 pixels */
346 - 8) /* extra max_pixel_depth pad */
347 info_ptr->rowbytes = (png_size_t)0;
348 else
349 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width);
350}
351
352#if defined(PNG_oFFs_SUPPORTED)
353void PNGAPI
354png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
355 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
356{
357 png_debug1(1, "in %s storage function\n", "oFFs");
358 if (png_ptr == NULL || info_ptr == NULL)
359 return;
360
361 info_ptr->x_offset = offset_x;
362 info_ptr->y_offset = offset_y;
363 info_ptr->offset_unit_type = (png_byte)unit_type;
364 info_ptr->valid |= PNG_INFO_oFFs;
365}
366#endif
367
368#if defined(PNG_pCAL_SUPPORTED)
369void PNGAPI
370png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
371 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
372 png_charp units, png_charpp params)
373{
374 png_uint_32 length;
375 int i;
376
377 png_debug1(1, "in %s storage function\n", "pCAL");
378 if (png_ptr == NULL || info_ptr == NULL)
379 return;
380
381 length = png_strlen(purpose) + 1;
382 png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
383 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
384 if (info_ptr->pcal_purpose == NULL)
385 {
386 png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
387 return;
388 }
389 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
390
391 png_debug(3, "storing X0, X1, type, and nparams in info\n");
392 info_ptr->pcal_X0 = X0;
393 info_ptr->pcal_X1 = X1;
394 info_ptr->pcal_type = (png_byte)type;
395 info_ptr->pcal_nparams = (png_byte)nparams;
396
397 length = png_strlen(units) + 1;
398 png_debug1(3, "allocating units for info (%lu bytes)\n", length);
399 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
400 if (info_ptr->pcal_units == NULL)
401 {
402 png_warning(png_ptr, "Insufficient memory for pCAL units.");
403 return;
404 }
405 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
406
407 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
408 (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
409 if (info_ptr->pcal_params == NULL)
410 {
411 png_warning(png_ptr, "Insufficient memory for pCAL params.");
412 return;
413 }
414
415 info_ptr->pcal_params[nparams] = NULL;
416
417 for (i = 0; i < nparams; i++)
418 {
419 length = png_strlen(params[i]) + 1;
420 png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
421 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
422 if (info_ptr->pcal_params[i] == NULL)
423 {
424 png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
425 return;
426 }
427 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
428 }
429
430 info_ptr->valid |= PNG_INFO_pCAL;
431#ifdef PNG_FREE_ME_SUPPORTED
432 info_ptr->free_me |= PNG_FREE_PCAL;
433#endif
434}
435#endif
436
437#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
438#ifdef PNG_FLOATING_POINT_SUPPORTED
439void PNGAPI
440png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
441 int unit, double width, double height)
442{
443 png_debug1(1, "in %s storage function\n", "sCAL");
444 if (png_ptr == NULL || info_ptr == NULL)
445 return;
446
447 info_ptr->scal_unit = (png_byte)unit;
448 info_ptr->scal_pixel_width = width;
449 info_ptr->scal_pixel_height = height;
450
451 info_ptr->valid |= PNG_INFO_sCAL;
452}
453#else
454#ifdef PNG_FIXED_POINT_SUPPORTED
455void PNGAPI
456png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
457 int unit, png_charp swidth, png_charp sheight)
458{
459 png_uint_32 length;
460
461 png_debug1(1, "in %s storage function\n", "sCAL");
462 if (png_ptr == NULL || info_ptr == NULL)
463 return;
464
465 info_ptr->scal_unit = (png_byte)unit;
466
467 length = png_strlen(swidth) + 1;
468 png_debug1(3, "allocating unit for info (%d bytes)\n", length);
469 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
470 if (info_ptr->scal_s_width == NULL)
471 {
472 png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
473 }
474 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
475
476 length = png_strlen(sheight) + 1;
477 png_debug1(3, "allocating unit for info (%d bytes)\n", length);
478 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
479 if (info_ptr->scal_s_height == NULL)
480 {
481 png_free (png_ptr, info_ptr->scal_s_width);
482 png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
483 }
484 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
485
486 info_ptr->valid |= PNG_INFO_sCAL;
487#ifdef PNG_FREE_ME_SUPPORTED
488 info_ptr->free_me |= PNG_FREE_SCAL;
489#endif
490}
491#endif
492#endif
493#endif
494
495#if defined(PNG_pHYs_SUPPORTED)
496void PNGAPI
497png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
498 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
499{
500 png_debug1(1, "in %s storage function\n", "pHYs");
501 if (png_ptr == NULL || info_ptr == NULL)
502 return;
503
504 info_ptr->x_pixels_per_unit = res_x;
505 info_ptr->y_pixels_per_unit = res_y;
506 info_ptr->phys_unit_type = (png_byte)unit_type;
507 info_ptr->valid |= PNG_INFO_pHYs;
508}
509#endif
510
511void PNGAPI
512png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
513 png_colorp palette, int num_palette)
514{
515
516 png_debug1(1, "in %s storage function\n", "PLTE");
517 if (png_ptr == NULL || info_ptr == NULL)
518 return;
519
520 /*
521 * It may not actually be necessary to set png_ptr->palette here;
522 * we do it for backward compatibility with the way the png_handle_tRNS
523 * function used to do the allocation.
524 */
525#ifdef PNG_FREE_ME_SUPPORTED
526 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
527#endif
528
529 /* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
530 in case of an invalid PNG file that has too-large sample values. */
531 png_ptr->palette = (png_colorp)png_malloc(png_ptr,
532 256 * png_sizeof(png_color));
533 png_memset(png_ptr->palette, 0, 256 * png_sizeof(png_color));
534 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color));
535 info_ptr->palette = png_ptr->palette;
536 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
537
538#ifdef PNG_FREE_ME_SUPPORTED
539 info_ptr->free_me |= PNG_FREE_PLTE;
540#else
541 png_ptr->flags |= PNG_FLAG_FREE_PLTE;
542#endif
543
544 info_ptr->valid |= PNG_INFO_PLTE;
545}
546
547#if defined(PNG_sBIT_SUPPORTED)
548void PNGAPI
549png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
550 png_color_8p sig_bit)
551{
552 png_debug1(1, "in %s storage function\n", "sBIT");
553 if (png_ptr == NULL || info_ptr == NULL)
554 return;
555
556 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof (png_color_8));
557 info_ptr->valid |= PNG_INFO_sBIT;
558}
559#endif
560
561#if defined(PNG_sRGB_SUPPORTED)
562void PNGAPI
563png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
564{
565 png_debug1(1, "in %s storage function\n", "sRGB");
566 if (png_ptr == NULL || info_ptr == NULL)
567 return;
568
569 info_ptr->srgb_intent = (png_byte)intent;
570 info_ptr->valid |= PNG_INFO_sRGB;
571}
572
573void PNGAPI
574png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
575 int intent)
576{
577#if defined(PNG_gAMA_SUPPORTED)
578#ifdef PNG_FLOATING_POINT_SUPPORTED
579 float file_gamma;
580#endif
581#ifdef PNG_FIXED_POINT_SUPPORTED
582 png_fixed_point int_file_gamma;
583#endif
584#endif
585#if defined(PNG_cHRM_SUPPORTED)
586#ifdef PNG_FLOATING_POINT_SUPPORTED
587 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
588#endif
589#ifdef PNG_FIXED_POINT_SUPPORTED
590 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
591 int_green_y, int_blue_x, int_blue_y;
592#endif
593#endif
594 png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
595 if (png_ptr == NULL || info_ptr == NULL)
596 return;
597
598 png_set_sRGB(png_ptr, info_ptr, intent);
599
600#if defined(PNG_gAMA_SUPPORTED)
601#ifdef PNG_FLOATING_POINT_SUPPORTED
602 file_gamma = (float).45455;
603 png_set_gAMA(png_ptr, info_ptr, file_gamma);
604#endif
605#ifdef PNG_FIXED_POINT_SUPPORTED
606 int_file_gamma = 45455L;
607 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
608#endif
609#endif
610
611#if defined(PNG_cHRM_SUPPORTED)
612#ifdef PNG_FIXED_POINT_SUPPORTED
613 int_white_x = 31270L;
614 int_white_y = 32900L;
615 int_red_x = 64000L;
616 int_red_y = 33000L;
617 int_green_x = 30000L;
618 int_green_y = 60000L;
619 int_blue_x = 15000L;
620 int_blue_y = 6000L;
621
622 png_set_cHRM_fixed(png_ptr, info_ptr,
623 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
624 int_blue_x, int_blue_y);
625#endif
626#ifdef PNG_FLOATING_POINT_SUPPORTED
627 white_x = (float).3127;
628 white_y = (float).3290;
629 red_x = (float).64;
630 red_y = (float).33;
631 green_x = (float).30;
632 green_y = (float).60;
633 blue_x = (float).15;
634 blue_y = (float).06;
635
636 png_set_cHRM(png_ptr, info_ptr,
637 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
638#endif
639#endif
640}
641#endif
642
643
644#if defined(PNG_iCCP_SUPPORTED)
645void PNGAPI
646png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
647 png_charp name, int compression_type,
648 png_charp profile, png_uint_32 proflen)
649{
650 png_charp new_iccp_name;
651 png_charp new_iccp_profile;
652
653 png_debug1(1, "in %s storage function\n", "iCCP");
654 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
655 return;
656
657 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, png_strlen(name)+1);
658 if (new_iccp_name == NULL)
659 {
660 png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
661 return;
662 }
663 png_strcpy(new_iccp_name, name);
664 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
665 if (new_iccp_profile == NULL)
666 {
667 png_free (png_ptr, new_iccp_name);
668 png_warning(png_ptr, "Insufficient memory to process iCCP profile.");
669 return;
670 }
671 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
672
673 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
674
675 info_ptr->iccp_proflen = proflen;
676 info_ptr->iccp_name = new_iccp_name;
677 info_ptr->iccp_profile = new_iccp_profile;
678 /* Compression is always zero but is here so the API and info structure
679 * does not have to change if we introduce multiple compression types */
680 info_ptr->iccp_compression = (png_byte)compression_type;
681#ifdef PNG_FREE_ME_SUPPORTED
682 info_ptr->free_me |= PNG_FREE_ICCP;
683#endif
684 info_ptr->valid |= PNG_INFO_iCCP;
685}
686#endif
687
688#if defined(PNG_TEXT_SUPPORTED)
689void PNGAPI
690png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
691 int num_text)
692{
693 int ret;
694 ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
695 if (ret)
696 png_error(png_ptr, "Insufficient memory to store text");
697}
698
699int /* PRIVATE */
700png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
701 int num_text)
702{
703 int i;
704
705 png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
706 "text" : (png_const_charp)png_ptr->chunk_name));
707
708 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
709 return(0);
710
711 /* Make sure we have enough space in the "text" array in info_struct
712 * to hold all of the incoming text_ptr objects.
713 */
714 if (info_ptr->num_text + num_text > info_ptr->max_text)
715 {
716 if (info_ptr->text != NULL)
717 {
718 png_textp old_text;
719 int old_max;
720
721 old_max = info_ptr->max_text;
722 info_ptr->max_text = info_ptr->num_text + num_text + 8;
723 old_text = info_ptr->text;
724 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
725 (png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
726 if (info_ptr->text == NULL)
727 {
728 png_free(png_ptr, old_text);
729 return(1);
730 }
731 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
732 png_sizeof(png_text)));
733 png_free(png_ptr, old_text);
734 }
735 else
736 {
737 info_ptr->max_text = num_text + 8;
738 info_ptr->num_text = 0;
739 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
740 (png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
741 if (info_ptr->text == NULL)
742 return(1);
743#ifdef PNG_FREE_ME_SUPPORTED
744 info_ptr->free_me |= PNG_FREE_TEXT;
745#endif
746 }
747 png_debug1(3, "allocated %d entries for info_ptr->text\n",
748 info_ptr->max_text);
749 }
750 for (i = 0; i < num_text; i++)
751 {
752 png_size_t text_length,key_len;
753 png_size_t lang_len,lang_key_len;
754 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
755
756 if (text_ptr[i].key == NULL)
757 continue;
758
759 key_len = png_strlen(text_ptr[i].key);
760
761 if(text_ptr[i].compression <= 0)
762 {
763 lang_len = 0;
764 lang_key_len = 0;
765 }
766 else
767#ifdef PNG_iTXt_SUPPORTED
768 {
769 /* set iTXt data */
770 if (text_ptr[i].lang != NULL)
771 lang_len = png_strlen(text_ptr[i].lang);
772 else
773 lang_len = 0;
774 if (text_ptr[i].lang_key != NULL)
775 lang_key_len = png_strlen(text_ptr[i].lang_key);
776 else
777 lang_key_len = 0;
778 }
779#else
780 {
781 png_warning(png_ptr, "iTXt chunk not supported.");
782 continue;
783 }
784#endif
785
786 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
787 {
788 text_length = 0;
789#ifdef PNG_iTXt_SUPPORTED
790 if(text_ptr[i].compression > 0)
791 textp->compression = PNG_ITXT_COMPRESSION_NONE;
792 else
793#endif
794 textp->compression = PNG_TEXT_COMPRESSION_NONE;
795 }
796 else
797 {
798 text_length = png_strlen(text_ptr[i].text);
799 textp->compression = text_ptr[i].compression;
800 }
801
802 textp->key = (png_charp)png_malloc_warn(png_ptr,
803 (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
804 if (textp->key == NULL)
805 return(1);
806 png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
807 (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
808 (int)textp->key);
809
810 png_memcpy(textp->key, text_ptr[i].key,
811 (png_size_t)(key_len));
812 *(textp->key+key_len) = '\0';
813#ifdef PNG_iTXt_SUPPORTED
814 if (text_ptr[i].compression > 0)
815 {
816 textp->lang=textp->key + key_len + 1;
817 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
818 *(textp->lang+lang_len) = '\0';
819 textp->lang_key=textp->lang + lang_len + 1;
820 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
821 *(textp->lang_key+lang_key_len) = '\0';
822 textp->text=textp->lang_key + lang_key_len + 1;
823 }
824 else
825#endif
826 {
827#ifdef PNG_iTXt_SUPPORTED
828 textp->lang=NULL;
829 textp->lang_key=NULL;
830#endif
831 textp->text=textp->key + key_len + 1;
832 }
833 if(text_length)
834 png_memcpy(textp->text, text_ptr[i].text,
835 (png_size_t)(text_length));
836 *(textp->text+text_length) = '\0';
837
838#ifdef PNG_iTXt_SUPPORTED
839 if(textp->compression > 0)
840 {
841 textp->text_length = 0;
842 textp->itxt_length = text_length;
843 }
844 else
845#endif
846 {
847 textp->text_length = text_length;
848#ifdef PNG_iTXt_SUPPORTED
849 textp->itxt_length = 0;
850#endif
851 }
852 info_ptr->text[info_ptr->num_text]= *textp;
853 info_ptr->num_text++;
854 png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
855 }
856 return(0);
857}
858#endif
859
860#if defined(PNG_tIME_SUPPORTED)
861void PNGAPI
862png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
863{
864 png_debug1(1, "in %s storage function\n", "tIME");
865 if (png_ptr == NULL || info_ptr == NULL ||
866 (png_ptr->mode & PNG_WROTE_tIME))
867 return;
868
869 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof (png_time));
870 info_ptr->valid |= PNG_INFO_tIME;
871}
872#endif
873
874#if defined(PNG_tRNS_SUPPORTED)
875void PNGAPI
876png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
877 png_bytep trans, int num_trans, png_color_16p trans_values)
878{
879 png_debug1(1, "in %s storage function\n", "tRNS");
880 if (png_ptr == NULL || info_ptr == NULL)
881 return;
882
883 if (trans != NULL)
884 {
885 /*
886 * It may not actually be necessary to set png_ptr->trans here;
887 * we do it for backward compatibility with the way the png_handle_tRNS
888 * function used to do the allocation.
889 */
890#ifdef PNG_FREE_ME_SUPPORTED
891 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
892#endif
893 /* Changed from num_trans to 256 in version 1.2.1 */
894 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
895 (png_uint_32)256);
896 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
897#ifdef PNG_FREE_ME_SUPPORTED
898 info_ptr->free_me |= PNG_FREE_TRNS;
899#else
900 png_ptr->flags |= PNG_FLAG_FREE_TRNS;
901#endif
902 }
903
904 if (trans_values != NULL)
905 {
906 png_memcpy(&(info_ptr->trans_values), trans_values,
907 png_sizeof(png_color_16));
908 if (num_trans == 0)
909 num_trans = 1;
910 }
911 info_ptr->num_trans = (png_uint_16)num_trans;
912 info_ptr->valid |= PNG_INFO_tRNS;
913}
914#endif
915
916#if defined(PNG_sPLT_SUPPORTED)
917void PNGAPI
918png_set_sPLT(png_structp png_ptr,
919 png_infop info_ptr, png_sPLT_tp entries, int nentries)
920{
921 png_sPLT_tp np;
922 int i;
923
924 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
925 (info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t));
926 if (np == NULL)
927 {
928 png_warning(png_ptr, "No memory for sPLT palettes.");
929 return;
930 }
931
932 png_memcpy(np, info_ptr->splt_palettes,
933 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
934 png_free(png_ptr, info_ptr->splt_palettes);
935 info_ptr->splt_palettes=NULL;
936
937 for (i = 0; i < nentries; i++)
938 {
939 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
940 png_sPLT_tp from = entries + i;
941
942 to->name = (png_charp)png_malloc(png_ptr,
943 png_strlen(from->name) + 1);
944 /* TODO: use png_malloc_warn */
945 png_strcpy(to->name, from->name);
946 to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
947 from->nentries * png_sizeof(png_sPLT_t));
948 /* TODO: use png_malloc_warn */
949 png_memcpy(to->entries, from->entries,
950 from->nentries * png_sizeof(png_sPLT_t));
951 to->nentries = from->nentries;
952 to->depth = from->depth;
953 }
954
955 info_ptr->splt_palettes = np;
956 info_ptr->splt_palettes_num += nentries;
957 info_ptr->valid |= PNG_INFO_sPLT;
958#ifdef PNG_FREE_ME_SUPPORTED
959 info_ptr->free_me |= PNG_FREE_SPLT;
960#endif
961}
962#endif /* PNG_sPLT_SUPPORTED */
963
964#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
965void PNGAPI
966png_set_unknown_chunks(png_structp png_ptr,
967 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
968{
969 png_unknown_chunkp np;
970 int i;
971
972 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
973 return;
974
975 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
976 (info_ptr->unknown_chunks_num + num_unknowns) *
977 png_sizeof(png_unknown_chunk));
978 if (np == NULL)
979 {
980 png_warning(png_ptr, "Out of memory while processing unknown chunk.");
981 return;
982 }
983
984 png_memcpy(np, info_ptr->unknown_chunks,
985 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
986 png_free(png_ptr, info_ptr->unknown_chunks);
987 info_ptr->unknown_chunks=NULL;
988
989 for (i = 0; i < num_unknowns; i++)
990 {
991 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
992 png_unknown_chunkp from = unknowns + i;
993
994 png_strncpy((png_charp)to->name, (png_charp)from->name, 5);
995 to->data = (png_bytep)png_malloc_warn(png_ptr, from->size);
996 if (to->data == NULL)
997 {
998 png_warning(png_ptr, "Out of memory processing unknown chunk.");
999 }
1000 else
1001 {
1002 png_memcpy(to->data, from->data, from->size);
1003 to->size = from->size;
1004
1005 /* note our location in the read or write sequence */
1006 to->location = (png_byte)(png_ptr->mode & 0xff);
1007 }
1008 }
1009
1010 info_ptr->unknown_chunks = np;
1011 info_ptr->unknown_chunks_num += num_unknowns;
1012#ifdef PNG_FREE_ME_SUPPORTED
1013 info_ptr->free_me |= PNG_FREE_UNKN;
1014#endif
1015}
1016void PNGAPI
1017png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1018 int chunk, int location)
1019{
1020 if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1021 (int)info_ptr->unknown_chunks_num)
1022 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1023}
1024#endif
1025
1026#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
1027 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
1028void PNGAPI
1029png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
1030{
1031 /* This function is deprecated in favor of png_permit_mng_features()
1032 and will be removed from libpng-2.0.0 */
1033 png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
1034 if (png_ptr == NULL)
1035 return;
1036 png_ptr->mng_features_permitted = (png_byte)
1037 ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) |
1038 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
1039}
1040#endif
1041
1042#if defined(PNG_MNG_FEATURES_SUPPORTED)
1043png_uint_32 PNGAPI
1044png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1045{
1046 png_debug(1, "in png_permit_mng_features\n");
1047 if (png_ptr == NULL)
1048 return (png_uint_32)0;
1049 png_ptr->mng_features_permitted =
1050 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1051 return (png_uint_32)png_ptr->mng_features_permitted;
1052}
1053#endif
1054
1055#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1056void PNGAPI
1057png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
1058 chunk_list, int num_chunks)
1059{
1060 png_bytep new_list, p;
1061 int i, old_num_chunks;
1062 if (num_chunks == 0)
1063 {
1064 if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1065 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1066 else
1067 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1068
1069 if(keep == PNG_HANDLE_CHUNK_ALWAYS)
1070 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1071 else
1072 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1073 return;
1074 }
1075 if (chunk_list == NULL)
1076 return;
1077 old_num_chunks=png_ptr->num_chunk_list;
1078 new_list=(png_bytep)png_malloc(png_ptr,
1079 (png_uint_32)(5*(num_chunks+old_num_chunks)));
1080 if(png_ptr->chunk_list != NULL)
1081 {
1082 png_memcpy(new_list, png_ptr->chunk_list,
1083 (png_size_t)(5*old_num_chunks));
1084 png_free(png_ptr, png_ptr->chunk_list);
1085 png_ptr->chunk_list=NULL;
1086 }
1087 png_memcpy(new_list+5*old_num_chunks, chunk_list,
1088 (png_size_t)(5*num_chunks));
1089 for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
1090 *p=(png_byte)keep;
1091 png_ptr->num_chunk_list=old_num_chunks+num_chunks;
1092 png_ptr->chunk_list=new_list;
1093#ifdef PNG_FREE_ME_SUPPORTED
1094 png_ptr->free_me |= PNG_FREE_LIST;
1095#endif
1096}
1097#endif
1098
1099#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
1100void PNGAPI
1101png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1102 png_user_chunk_ptr read_user_chunk_fn)
1103{
1104 png_debug(1, "in png_set_read_user_chunk_fn\n");
1105 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1106 png_ptr->user_chunk_ptr = user_chunk_ptr;
1107}
1108#endif
1109
1110#if defined(PNG_INFO_IMAGE_SUPPORTED)
1111void PNGAPI
1112png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1113{
1114 png_debug1(1, "in %s storage function\n", "rows");
1115
1116 if (png_ptr == NULL || info_ptr == NULL)
1117 return;
1118
1119 if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1120 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1121 info_ptr->row_pointers = row_pointers;
1122 if(row_pointers)
1123 info_ptr->valid |= PNG_INFO_IDAT;
1124}
1125#endif
1126
1127#ifdef PNG_WRITE_SUPPORTED
1128void PNGAPI
1129png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
1130{
1131 if(png_ptr->zbuf)
1132 png_free(png_ptr, png_ptr->zbuf);
1133 png_ptr->zbuf_size = (png_size_t)size;
1134 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1135 png_ptr->zstream.next_out = png_ptr->zbuf;
1136 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1137}
1138#endif
1139
1140void PNGAPI
1141png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1142{
1143 if (png_ptr && info_ptr)
1144 info_ptr->valid &= ~(mask);
1145}
1146
1147
1148#ifndef PNG_1_0_X
1149#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1150/* this function was added to libpng 1.2.0 and should always exist by default */
1151void PNGAPI
1152png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
1153{
1154 png_uint_32 settable_asm_flags;
1155 png_uint_32 settable_mmx_flags;
1156
1157 settable_mmx_flags =
1158#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
1159 PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
1160#endif
1161#ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
1162 PNG_ASM_FLAG_MMX_READ_INTERLACE |
1163#endif
1164#ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1165 PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
1166 PNG_ASM_FLAG_MMX_READ_FILTER_UP |
1167 PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
1168 PNG_ASM_FLAG_MMX_READ_FILTER_PAETH |
1169#endif
1170 0;
1171
1172 /* could be some non-MMX ones in the future, but not currently: */
1173 settable_asm_flags = settable_mmx_flags;
1174
1175 if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) ||
1176 !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU))
1177 {
1178 /* clear all MMX flags if MMX isn't supported */
1179 settable_asm_flags &= ~settable_mmx_flags;
1180 png_ptr->asm_flags &= ~settable_mmx_flags;
1181 }
1182
1183 /* we're replacing the settable bits with those passed in by the user,
1184 * so first zero them out of the master copy, then logical-OR in the
1185 * allowed subset that was requested */
1186
1187 png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */
1188 png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */
1189}
1190#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1191
1192#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1193/* this function was added to libpng 1.2.0 */
1194void PNGAPI
1195png_set_mmx_thresholds (png_structp png_ptr,
1196 png_byte mmx_bitdepth_threshold,
1197 png_uint_32 mmx_rowbytes_threshold)
1198{
1199 png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
1200 png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
1201}
1202#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1203
1204#ifdef PNG_SET_USER_LIMITS_SUPPORTED
1205/* this function was added to libpng 1.2.6 */
1206void PNGAPI
1207png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1208 png_uint_32 user_height_max)
1209{
1210 /* Images with dimensions larger than these limits will be
1211 * rejected by png_set_IHDR(). To accept any PNG datastream
1212 * regardless of dimensions, set both limits to 0x7ffffffL.
1213 */
1214 png_ptr->user_width_max = user_width_max;
1215 png_ptr->user_height_max = user_height_max;
1216}
1217#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1218
1219#endif /* ?PNG_1_0_X */
wxWidgets (Impactor)