/[pcsx2_0.9.7]/trunk/3rdparty/wxWidgets/src/png/pngset.c
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Contents of /trunk/3rdparty/wxWidgets/src/png/pngset.c

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Revision 31 - (show annotations) (download)
Tue Sep 7 03:24:11 2010 UTC (10 years, 2 months ago) by william
File MIME type: text/plain
File size: 39328 byte(s)
committing r3113 initial commit again...
1
2 /* pngset.c - storage of image information into info struct
3 *
4 * Last changed in libpng 1.2.39 [August 13, 2009]
5 * Copyright (c) 1998-2009 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
8 *
9 * This code is released under the libpng license.
10 * For conditions of distribution and use, see the disclaimer
11 * and license in png.h
12 *
13 * The functions here are used during reads to store data from the file
14 * into the info struct, and during writes to store application data
15 * into the info struct for writing into the file. This abstracts the
16 * info struct and allows us to change the structure in the future.
17 */
18
19 #define PNG_INTERNAL
20 #include "png.h"
21 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
22
23 #if defined(PNG_bKGD_SUPPORTED)
24 void PNGAPI
25 png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
26 {
27 png_debug1(1, "in %s storage function", "bKGD");
28 if (png_ptr == NULL || info_ptr == NULL)
29 return;
30
31 png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
32 info_ptr->valid |= PNG_INFO_bKGD;
33 }
34 #endif
35
36 #if defined(PNG_cHRM_SUPPORTED)
37 #ifdef PNG_FLOATING_POINT_SUPPORTED
38 void PNGAPI
39 png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
40 double white_x, double white_y, double red_x, double red_y,
41 double green_x, double green_y, double blue_x, double blue_y)
42 {
43 png_debug1(1, "in %s storage function", "cHRM");
44 if (png_ptr == NULL || info_ptr == NULL)
45 return;
46
47 info_ptr->x_white = (float)white_x;
48 info_ptr->y_white = (float)white_y;
49 info_ptr->x_red = (float)red_x;
50 info_ptr->y_red = (float)red_y;
51 info_ptr->x_green = (float)green_x;
52 info_ptr->y_green = (float)green_y;
53 info_ptr->x_blue = (float)blue_x;
54 info_ptr->y_blue = (float)blue_y;
55 #ifdef PNG_FIXED_POINT_SUPPORTED
56 info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
57 info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
58 info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
59 info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
60 info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
61 info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
62 info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
63 info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
64 #endif
65 info_ptr->valid |= PNG_INFO_cHRM;
66 }
67 #endif /* PNG_FLOATING_POINT_SUPPORTED */
68
69 #ifdef PNG_FIXED_POINT_SUPPORTED
70 void PNGAPI
71 png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
72 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
73 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
74 png_fixed_point blue_x, png_fixed_point blue_y)
75 {
76 png_debug1(1, "in %s storage function", "cHRM fixed");
77 if (png_ptr == NULL || info_ptr == NULL)
78 return;
79
80 #if !defined(PNG_NO_CHECK_cHRM)
81 if (png_check_cHRM_fixed(png_ptr,
82 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
83 #endif
84 {
85 info_ptr->int_x_white = white_x;
86 info_ptr->int_y_white = white_y;
87 info_ptr->int_x_red = red_x;
88 info_ptr->int_y_red = red_y;
89 info_ptr->int_x_green = green_x;
90 info_ptr->int_y_green = green_y;
91 info_ptr->int_x_blue = blue_x;
92 info_ptr->int_y_blue = blue_y;
93 #ifdef PNG_FLOATING_POINT_SUPPORTED
94 info_ptr->x_white = (float)(white_x/100000.);
95 info_ptr->y_white = (float)(white_y/100000.);
96 info_ptr->x_red = (float)( red_x/100000.);
97 info_ptr->y_red = (float)( red_y/100000.);
98 info_ptr->x_green = (float)(green_x/100000.);
99 info_ptr->y_green = (float)(green_y/100000.);
100 info_ptr->x_blue = (float)( blue_x/100000.);
101 info_ptr->y_blue = (float)( blue_y/100000.);
102 #endif
103 info_ptr->valid |= PNG_INFO_cHRM;
104 }
105 }
106 #endif /* PNG_FIXED_POINT_SUPPORTED */
107 #endif /* PNG_cHRM_SUPPORTED */
108
109 #if defined(PNG_gAMA_SUPPORTED)
110 #ifdef PNG_FLOATING_POINT_SUPPORTED
111 void PNGAPI
112 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
113 {
114 double png_gamma;
115 png_debug1(1, "in %s storage function", "gAMA");
116 if (png_ptr == NULL || info_ptr == NULL)
117 return;
118
119 /* Check for overflow */
120 if (file_gamma > 21474.83)
121 {
122 png_warning(png_ptr, "Limiting gamma to 21474.83");
123 png_gamma=21474.83;
124 }
125 else
126 png_gamma = file_gamma;
127 info_ptr->gamma = (float)png_gamma;
128 #ifdef PNG_FIXED_POINT_SUPPORTED
129 info_ptr->int_gamma = (int)(png_gamma*100000.+.5);
130 #endif
131 info_ptr->valid |= PNG_INFO_gAMA;
132 if (png_gamma == 0.0)
133 png_warning(png_ptr, "Setting gamma=0");
134 }
135 #endif
136 void PNGAPI
137 png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
138 int_gamma)
139 {
140 png_fixed_point png_gamma;
141
142 png_debug1(1, "in %s storage function", "gAMA");
143 if (png_ptr == NULL || info_ptr == NULL)
144 return;
145
146 if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX)
147 {
148 png_warning(png_ptr, "Limiting gamma to 21474.83");
149 png_gamma=PNG_UINT_31_MAX;
150 }
151 else
152 {
153 if (int_gamma < 0)
154 {
155 png_warning(png_ptr, "Setting negative gamma to zero");
156 png_gamma = 0;
157 }
158 else
159 png_gamma = int_gamma;
160 }
161 #ifdef PNG_FLOATING_POINT_SUPPORTED
162 info_ptr->gamma = (float)(png_gamma/100000.);
163 #endif
164 #ifdef PNG_FIXED_POINT_SUPPORTED
165 info_ptr->int_gamma = png_gamma;
166 #endif
167 info_ptr->valid |= PNG_INFO_gAMA;
168 if (png_gamma == 0)
169 png_warning(png_ptr, "Setting gamma=0");
170 }
171 #endif
172
173 #if defined(PNG_hIST_SUPPORTED)
174 void PNGAPI
175 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
176 {
177 int i;
178
179 png_debug1(1, "in %s storage function", "hIST");
180 if (png_ptr == NULL || info_ptr == NULL)
181 return;
182 if (info_ptr->num_palette == 0 || info_ptr->num_palette
183 > PNG_MAX_PALETTE_LENGTH)
184 {
185 png_warning(png_ptr,
186 "Invalid palette size, hIST allocation skipped.");
187 return;
188 }
189
190 #ifdef PNG_FREE_ME_SUPPORTED
191 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
192 #endif
193 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
194 * version 1.2.1
195 */
196 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
197 (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
198 if (png_ptr->hist == NULL)
199 {
200 png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
201 return;
202 }
203
204 for (i = 0; i < info_ptr->num_palette; i++)
205 png_ptr->hist[i] = hist[i];
206 info_ptr->hist = png_ptr->hist;
207 info_ptr->valid |= PNG_INFO_hIST;
208
209 #ifdef PNG_FREE_ME_SUPPORTED
210 info_ptr->free_me |= PNG_FREE_HIST;
211 #else
212 png_ptr->flags |= PNG_FLAG_FREE_HIST;
213 #endif
214 }
215 #endif
216
217 void PNGAPI
218 png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
219 png_uint_32 width, png_uint_32 height, int bit_depth,
220 int color_type, int interlace_type, int compression_type,
221 int filter_type)
222 {
223 png_debug1(1, "in %s storage function", "IHDR");
224 if (png_ptr == NULL || info_ptr == NULL)
225 return;
226
227 /* Check for width and height valid values */
228 if (width == 0 || height == 0)
229 png_error(png_ptr, "Image width or height is zero in IHDR");
230 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
231 if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
232 png_error(png_ptr, "image size exceeds user limits in IHDR");
233 #else
234 if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
235 png_error(png_ptr, "image size exceeds user limits in IHDR");
236 #endif
237 if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
238 png_error(png_ptr, "Invalid image size in IHDR");
239 if ( width > (PNG_UINT_32_MAX
240 >> 3) /* 8-byte RGBA pixels */
241 - 64 /* bigrowbuf hack */
242 - 1 /* filter byte */
243 - 7*8 /* rounding of width to multiple of 8 pixels */
244 - 8) /* extra max_pixel_depth pad */
245 png_warning(png_ptr, "Width is too large for libpng to process pixels");
246
247 /* Check other values */
248 if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
249 bit_depth != 8 && bit_depth != 16)
250 png_error(png_ptr, "Invalid bit depth in IHDR");
251
252 if (color_type < 0 || color_type == 1 ||
253 color_type == 5 || color_type > 6)
254 png_error(png_ptr, "Invalid color type in IHDR");
255
256 if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
257 ((color_type == PNG_COLOR_TYPE_RGB ||
258 color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
259 color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
260 png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
261
262 if (interlace_type >= PNG_INTERLACE_LAST)
263 png_error(png_ptr, "Unknown interlace method in IHDR");
264
265 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
266 png_error(png_ptr, "Unknown compression method in IHDR");
267
268 #if defined(PNG_MNG_FEATURES_SUPPORTED)
269 /* Accept filter_method 64 (intrapixel differencing) only if
270 * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
271 * 2. Libpng did not read a PNG signature (this filter_method is only
272 * used in PNG datastreams that are embedded in MNG datastreams) and
273 * 3. The application called png_permit_mng_features with a mask that
274 * included PNG_FLAG_MNG_FILTER_64 and
275 * 4. The filter_method is 64 and
276 * 5. The color_type is RGB or RGBA
277 */
278 if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
279 png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
280 if (filter_type != PNG_FILTER_TYPE_BASE)
281 {
282 if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
283 (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
284 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
285 (color_type == PNG_COLOR_TYPE_RGB ||
286 color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
287 png_error(png_ptr, "Unknown filter method in IHDR");
288 if (png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
289 png_warning(png_ptr, "Invalid filter method in IHDR");
290 }
291 #else
292 if (filter_type != PNG_FILTER_TYPE_BASE)
293 png_error(png_ptr, "Unknown filter method in IHDR");
294 #endif
295
296 info_ptr->width = width;
297 info_ptr->height = height;
298 info_ptr->bit_depth = (png_byte)bit_depth;
299 info_ptr->color_type =(png_byte) color_type;
300 info_ptr->compression_type = (png_byte)compression_type;
301 info_ptr->filter_type = (png_byte)filter_type;
302 info_ptr->interlace_type = (png_byte)interlace_type;
303 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
304 info_ptr->channels = 1;
305 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
306 info_ptr->channels = 3;
307 else
308 info_ptr->channels = 1;
309 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
310 info_ptr->channels++;
311 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
312
313 /* Check for potential overflow */
314 if (width > (PNG_UINT_32_MAX
315 >> 3) /* 8-byte RGBA pixels */
316 - 64 /* bigrowbuf hack */
317 - 1 /* filter byte */
318 - 7*8 /* rounding of width to multiple of 8 pixels */
319 - 8) /* extra max_pixel_depth pad */
320 info_ptr->rowbytes = (png_size_t)0;
321 else
322 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
323 }
324
325 #if defined(PNG_oFFs_SUPPORTED)
326 void PNGAPI
327 png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
328 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
329 {
330 png_debug1(1, "in %s storage function", "oFFs");
331 if (png_ptr == NULL || info_ptr == NULL)
332 return;
333
334 info_ptr->x_offset = offset_x;
335 info_ptr->y_offset = offset_y;
336 info_ptr->offset_unit_type = (png_byte)unit_type;
337 info_ptr->valid |= PNG_INFO_oFFs;
338 }
339 #endif
340
341 #if defined(PNG_pCAL_SUPPORTED)
342 void PNGAPI
343 png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
344 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
345 png_charp units, png_charpp params)
346 {
347 png_uint_32 length;
348 int i;
349
350 png_debug1(1, "in %s storage function", "pCAL");
351 if (png_ptr == NULL || info_ptr == NULL)
352 return;
353
354 length = png_strlen(purpose) + 1;
355 png_debug1(3, "allocating purpose for info (%lu bytes)",
356 (unsigned long)length);
357 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
358 if (info_ptr->pcal_purpose == NULL)
359 {
360 png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
361 return;
362 }
363 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
364
365 png_debug(3, "storing X0, X1, type, and nparams in info");
366 info_ptr->pcal_X0 = X0;
367 info_ptr->pcal_X1 = X1;
368 info_ptr->pcal_type = (png_byte)type;
369 info_ptr->pcal_nparams = (png_byte)nparams;
370
371 length = png_strlen(units) + 1;
372 png_debug1(3, "allocating units for info (%lu bytes)",
373 (unsigned long)length);
374 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
375 if (info_ptr->pcal_units == NULL)
376 {
377 png_warning(png_ptr, "Insufficient memory for pCAL units.");
378 return;
379 }
380 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
381
382 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
383 (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
384 if (info_ptr->pcal_params == NULL)
385 {
386 png_warning(png_ptr, "Insufficient memory for pCAL params.");
387 return;
388 }
389
390 png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
391
392 for (i = 0; i < nparams; i++)
393 {
394 length = png_strlen(params[i]) + 1;
395 png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
396 (unsigned long)length);
397 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
398 if (info_ptr->pcal_params[i] == NULL)
399 {
400 png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
401 return;
402 }
403 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
404 }
405
406 info_ptr->valid |= PNG_INFO_pCAL;
407 #ifdef PNG_FREE_ME_SUPPORTED
408 info_ptr->free_me |= PNG_FREE_PCAL;
409 #endif
410 }
411 #endif
412
413 #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
414 #ifdef PNG_FLOATING_POINT_SUPPORTED
415 void PNGAPI
416 png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
417 int unit, double width, double height)
418 {
419 png_debug1(1, "in %s storage function", "sCAL");
420 if (png_ptr == NULL || info_ptr == NULL)
421 return;
422
423 info_ptr->scal_unit = (png_byte)unit;
424 info_ptr->scal_pixel_width = width;
425 info_ptr->scal_pixel_height = height;
426
427 info_ptr->valid |= PNG_INFO_sCAL;
428 }
429 #else
430 #ifdef PNG_FIXED_POINT_SUPPORTED
431 void PNGAPI
432 png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
433 int unit, png_charp swidth, png_charp sheight)
434 {
435 png_uint_32 length;
436
437 png_debug1(1, "in %s storage function", "sCAL");
438 if (png_ptr == NULL || info_ptr == NULL)
439 return;
440
441 info_ptr->scal_unit = (png_byte)unit;
442
443 length = png_strlen(swidth) + 1;
444 png_debug1(3, "allocating unit for info (%u bytes)",
445 (unsigned int)length);
446 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
447 if (info_ptr->scal_s_width == NULL)
448 {
449 png_warning(png_ptr,
450 "Memory allocation failed while processing sCAL.");
451 return;
452 }
453 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
454
455 length = png_strlen(sheight) + 1;
456 png_debug1(3, "allocating unit for info (%u bytes)",
457 (unsigned int)length);
458 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
459 if (info_ptr->scal_s_height == NULL)
460 {
461 png_free (png_ptr, info_ptr->scal_s_width);
462 info_ptr->scal_s_width = NULL;
463 png_warning(png_ptr,
464 "Memory allocation failed while processing sCAL.");
465 return;
466 }
467 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
468 info_ptr->valid |= PNG_INFO_sCAL;
469 #ifdef PNG_FREE_ME_SUPPORTED
470 info_ptr->free_me |= PNG_FREE_SCAL;
471 #endif
472 }
473 #endif
474 #endif
475 #endif
476
477 #if defined(PNG_pHYs_SUPPORTED)
478 void PNGAPI
479 png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
480 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
481 {
482 png_debug1(1, "in %s storage function", "pHYs");
483 if (png_ptr == NULL || info_ptr == NULL)
484 return;
485
486 info_ptr->x_pixels_per_unit = res_x;
487 info_ptr->y_pixels_per_unit = res_y;
488 info_ptr->phys_unit_type = (png_byte)unit_type;
489 info_ptr->valid |= PNG_INFO_pHYs;
490 }
491 #endif
492
493 void PNGAPI
494 png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
495 png_colorp palette, int num_palette)
496 {
497
498 png_debug1(1, "in %s storage function", "PLTE");
499 if (png_ptr == NULL || info_ptr == NULL)
500 return;
501
502 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
503 {
504 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
505 png_error(png_ptr, "Invalid palette length");
506 else
507 {
508 png_warning(png_ptr, "Invalid palette length");
509 return;
510 }
511 }
512
513 /*
514 * It may not actually be necessary to set png_ptr->palette here;
515 * we do it for backward compatibility with the way the png_handle_tRNS
516 * function used to do the allocation.
517 */
518 #ifdef PNG_FREE_ME_SUPPORTED
519 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
520 #endif
521
522 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
523 * of num_palette entries, in case of an invalid PNG file that has
524 * too-large sample values.
525 */
526 png_ptr->palette = (png_colorp)png_malloc(png_ptr,
527 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
528 png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
529 png_sizeof(png_color));
530 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
531 info_ptr->palette = png_ptr->palette;
532 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
533
534 #ifdef PNG_FREE_ME_SUPPORTED
535 info_ptr->free_me |= PNG_FREE_PLTE;
536 #else
537 png_ptr->flags |= PNG_FLAG_FREE_PLTE;
538 #endif
539
540 info_ptr->valid |= PNG_INFO_PLTE;
541 }
542
543 #if defined(PNG_sBIT_SUPPORTED)
544 void PNGAPI
545 png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
546 png_color_8p sig_bit)
547 {
548 png_debug1(1, "in %s storage function", "sBIT");
549 if (png_ptr == NULL || info_ptr == NULL)
550 return;
551
552 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
553 info_ptr->valid |= PNG_INFO_sBIT;
554 }
555 #endif
556
557 #if defined(PNG_sRGB_SUPPORTED)
558 void PNGAPI
559 png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
560 {
561 png_debug1(1, "in %s storage function", "sRGB");
562 if (png_ptr == NULL || info_ptr == NULL)
563 return;
564
565 info_ptr->srgb_intent = (png_byte)intent;
566 info_ptr->valid |= PNG_INFO_sRGB;
567 }
568
569 void PNGAPI
570 png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
571 int intent)
572 {
573 #if defined(PNG_gAMA_SUPPORTED)
574 #ifdef PNG_FLOATING_POINT_SUPPORTED
575 float file_gamma;
576 #endif
577 #ifdef PNG_FIXED_POINT_SUPPORTED
578 png_fixed_point int_file_gamma;
579 #endif
580 #endif
581 #if defined(PNG_cHRM_SUPPORTED)
582 #ifdef PNG_FLOATING_POINT_SUPPORTED
583 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
584 #endif
585 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
586 int_green_y, int_blue_x, int_blue_y;
587 #endif
588 png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
589 if (png_ptr == NULL || info_ptr == NULL)
590 return;
591
592 png_set_sRGB(png_ptr, info_ptr, intent);
593
594 #if defined(PNG_gAMA_SUPPORTED)
595 #ifdef PNG_FLOATING_POINT_SUPPORTED
596 file_gamma = (float).45455;
597 png_set_gAMA(png_ptr, info_ptr, file_gamma);
598 #endif
599 #ifdef PNG_FIXED_POINT_SUPPORTED
600 int_file_gamma = 45455L;
601 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
602 #endif
603 #endif
604
605 #if defined(PNG_cHRM_SUPPORTED)
606 int_white_x = 31270L;
607 int_white_y = 32900L;
608 int_red_x = 64000L;
609 int_red_y = 33000L;
610 int_green_x = 30000L;
611 int_green_y = 60000L;
612 int_blue_x = 15000L;
613 int_blue_y = 6000L;
614
615 #ifdef PNG_FLOATING_POINT_SUPPORTED
616 white_x = (float).3127;
617 white_y = (float).3290;
618 red_x = (float).64;
619 red_y = (float).33;
620 green_x = (float).30;
621 green_y = (float).60;
622 blue_x = (float).15;
623 blue_y = (float).06;
624 #endif
625
626 #if !defined(PNG_NO_CHECK_cHRM)
627 if (png_check_cHRM_fixed(png_ptr,
628 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
629 int_green_y, int_blue_x, int_blue_y))
630 #endif
631 {
632 #ifdef PNG_FIXED_POINT_SUPPORTED
633 png_set_cHRM_fixed(png_ptr, info_ptr,
634 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
635 int_green_y, int_blue_x, int_blue_y);
636 #endif
637 #ifdef PNG_FLOATING_POINT_SUPPORTED
638 png_set_cHRM(png_ptr, info_ptr,
639 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
640 #endif
641 }
642 #endif /* cHRM */
643 }
644 #endif /* sRGB */
645
646
647 #if defined(PNG_iCCP_SUPPORTED)
648 void PNGAPI
649 png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
650 png_charp name, int compression_type,
651 png_charp profile, png_uint_32 proflen)
652 {
653 png_charp new_iccp_name;
654 png_charp new_iccp_profile;
655 png_uint_32 length;
656
657 png_debug1(1, "in %s storage function", "iCCP");
658 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
659 return;
660
661 length = png_strlen(name)+1;
662 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
663 if (new_iccp_name == NULL)
664 {
665 png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
666 return;
667 }
668 png_memcpy(new_iccp_name, name, length);
669 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
670 if (new_iccp_profile == NULL)
671 {
672 png_free (png_ptr, new_iccp_name);
673 png_warning(png_ptr,
674 "Insufficient memory to process iCCP profile.");
675 return;
676 }
677 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
678
679 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
680
681 info_ptr->iccp_proflen = proflen;
682 info_ptr->iccp_name = new_iccp_name;
683 info_ptr->iccp_profile = new_iccp_profile;
684 /* Compression is always zero but is here so the API and info structure
685 * does not have to change if we introduce multiple compression types */
686 info_ptr->iccp_compression = (png_byte)compression_type;
687 #ifdef PNG_FREE_ME_SUPPORTED
688 info_ptr->free_me |= PNG_FREE_ICCP;
689 #endif
690 info_ptr->valid |= PNG_INFO_iCCP;
691 }
692 #endif
693
694 #if defined(PNG_TEXT_SUPPORTED)
695 void PNGAPI
696 png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
697 int num_text)
698 {
699 int ret;
700 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
701 if (ret)
702 png_error(png_ptr, "Insufficient memory to store text");
703 }
704
705 int /* PRIVATE */
706 png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
707 int num_text)
708 {
709 int i;
710
711 png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
712 png_ptr->chunk_name[0] == '\0') ?
713 "text" : (png_const_charp)png_ptr->chunk_name));
714
715 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
716 return(0);
717
718 /* Make sure we have enough space in the "text" array in info_struct
719 * to hold all of the incoming text_ptr objects.
720 */
721 if (info_ptr->num_text + num_text > info_ptr->max_text)
722 {
723 if (info_ptr->text != NULL)
724 {
725 png_textp old_text;
726 int old_max;
727
728 old_max = info_ptr->max_text;
729 info_ptr->max_text = info_ptr->num_text + num_text + 8;
730 old_text = info_ptr->text;
731 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
732 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
733 if (info_ptr->text == NULL)
734 {
735 png_free(png_ptr, old_text);
736 return(1);
737 }
738 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
739 png_sizeof(png_text)));
740 png_free(png_ptr, old_text);
741 }
742 else
743 {
744 info_ptr->max_text = num_text + 8;
745 info_ptr->num_text = 0;
746 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
747 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
748 if (info_ptr->text == NULL)
749 return(1);
750 #ifdef PNG_FREE_ME_SUPPORTED
751 info_ptr->free_me |= PNG_FREE_TEXT;
752 #endif
753 }
754 png_debug1(3, "allocated %d entries for info_ptr->text",
755 info_ptr->max_text);
756 }
757 for (i = 0; i < num_text; i++)
758 {
759 png_size_t text_length, key_len;
760 png_size_t lang_len, lang_key_len;
761 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
762
763 if (text_ptr[i].key == NULL)
764 continue;
765
766 key_len = png_strlen(text_ptr[i].key);
767
768 if (text_ptr[i].compression <= 0)
769 {
770 lang_len = 0;
771 lang_key_len = 0;
772 }
773 else
774 #ifdef PNG_iTXt_SUPPORTED
775 {
776 /* Set iTXt data */
777 if (text_ptr[i].lang != NULL)
778 lang_len = png_strlen(text_ptr[i].lang);
779 else
780 lang_len = 0;
781 if (text_ptr[i].lang_key != NULL)
782 lang_key_len = png_strlen(text_ptr[i].lang_key);
783 else
784 lang_key_len = 0;
785 }
786 #else
787 {
788 png_warning(png_ptr, "iTXt chunk not supported.");
789 continue;
790 }
791 #endif
792
793 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
794 {
795 text_length = 0;
796 #ifdef PNG_iTXt_SUPPORTED
797 if (text_ptr[i].compression > 0)
798 textp->compression = PNG_ITXT_COMPRESSION_NONE;
799 else
800 #endif
801 textp->compression = PNG_TEXT_COMPRESSION_NONE;
802 }
803 else
804 {
805 text_length = png_strlen(text_ptr[i].text);
806 textp->compression = text_ptr[i].compression;
807 }
808
809 textp->key = (png_charp)png_malloc_warn(png_ptr,
810 (png_uint_32)
811 (key_len + text_length + lang_len + lang_key_len + 4));
812 if (textp->key == NULL)
813 return(1);
814 png_debug2(2, "Allocated %lu bytes at %x in png_set_text",
815 (png_uint_32)
816 (key_len + lang_len + lang_key_len + text_length + 4),
817 (int)textp->key);
818
819 png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
820 *(textp->key + key_len) = '\0';
821 #ifdef PNG_iTXt_SUPPORTED
822 if (text_ptr[i].compression > 0)
823 {
824 textp->lang = textp->key + key_len + 1;
825 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
826 *(textp->lang + lang_len) = '\0';
827 textp->lang_key = textp->lang + lang_len + 1;
828 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
829 *(textp->lang_key + lang_key_len) = '\0';
830 textp->text = textp->lang_key + lang_key_len + 1;
831 }
832 else
833 #endif
834 {
835 #ifdef PNG_iTXt_SUPPORTED
836 textp->lang=NULL;
837 textp->lang_key=NULL;
838 #endif
839 textp->text = textp->key + key_len + 1;
840 }
841 if (text_length)
842 png_memcpy(textp->text, text_ptr[i].text,
843 (png_size_t)(text_length));
844 *(textp->text + text_length) = '\0';
845
846 #ifdef PNG_iTXt_SUPPORTED
847 if (textp->compression > 0)
848 {
849 textp->text_length = 0;
850 textp->itxt_length = text_length;
851 }
852 else
853 #endif
854 {
855 textp->text_length = text_length;
856 #ifdef PNG_iTXt_SUPPORTED
857 textp->itxt_length = 0;
858 #endif
859 }
860 info_ptr->num_text++;
861 png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
862 }
863 return(0);
864 }
865 #endif
866
867 #if defined(PNG_tIME_SUPPORTED)
868 void PNGAPI
869 png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
870 {
871 png_debug1(1, "in %s storage function", "tIME");
872 if (png_ptr == NULL || info_ptr == NULL ||
873 (png_ptr->mode & PNG_WROTE_tIME))
874 return;
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 #if defined(PNG_tRNS_SUPPORTED)
882 void PNGAPI
883 png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
884 png_bytep trans, int num_trans, png_color_16p trans_values)
885 {
886 png_debug1(1, "in %s storage function", "tRNS");
887 if (png_ptr == NULL || info_ptr == NULL)
888 return;
889
890 if (trans != NULL)
891 {
892 /*
893 * It may not actually be necessary to set png_ptr->trans 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 #ifdef PNG_FREE_ME_SUPPORTED
899 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
900 #endif
901
902 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
903 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
904 (png_uint_32)PNG_MAX_PALETTE_LENGTH);
905 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
906 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
907 }
908
909 if (trans_values != NULL)
910 {
911 int sample_max = (1 << info_ptr->bit_depth);
912 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
913 (int)trans_values->gray > sample_max) ||
914 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
915 ((int)trans_values->red > sample_max ||
916 (int)trans_values->green > sample_max ||
917 (int)trans_values->blue > sample_max)))
918 png_warning(png_ptr,
919 "tRNS chunk has out-of-range samples for bit_depth");
920 png_memcpy(&(info_ptr->trans_values), trans_values,
921 png_sizeof(png_color_16));
922 if (num_trans == 0)
923 num_trans = 1;
924 }
925
926 info_ptr->num_trans = (png_uint_16)num_trans;
927 if (num_trans != 0)
928 {
929 info_ptr->valid |= PNG_INFO_tRNS;
930 #ifdef PNG_FREE_ME_SUPPORTED
931 info_ptr->free_me |= PNG_FREE_TRNS;
932 #else
933 png_ptr->flags |= PNG_FLAG_FREE_TRNS;
934 #endif
935 }
936 }
937 #endif
938
939 #if defined(PNG_sPLT_SUPPORTED)
940 void PNGAPI
941 png_set_sPLT(png_structp png_ptr,
942 png_infop info_ptr, png_sPLT_tp entries, int nentries)
943 /*
944 * entries - array of png_sPLT_t structures
945 * to be added to the list of palettes
946 * in the info structure.
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_uint_32)png_sizeof(png_sPLT_t));
960 if (np == NULL)
961 {
962 png_warning(png_ptr, "No memory for sPLT palettes.");
963 return;
964 }
965
966 png_memcpy(np, info_ptr->splt_palettes,
967 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
968 png_free(png_ptr, info_ptr->splt_palettes);
969 info_ptr->splt_palettes=NULL;
970
971 for (i = 0; i < nentries; i++)
972 {
973 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
974 png_sPLT_tp from = entries + i;
975 png_uint_32 length;
976
977 length = png_strlen(from->name) + 1;
978 to->name = (png_charp)png_malloc_warn(png_ptr, length);
979 if (to->name == NULL)
980 {
981 png_warning(png_ptr,
982 "Out of memory while processing sPLT chunk");
983 continue;
984 }
985 png_memcpy(to->name, from->name, length);
986 to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
987 (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
988 if (to->entries == NULL)
989 {
990 png_warning(png_ptr,
991 "Out of memory while processing sPLT chunk");
992 png_free(png_ptr, to->name);
993 to->name = NULL;
994 continue;
995 }
996 png_memcpy(to->entries, from->entries,
997 from->nentries * png_sizeof(png_sPLT_entry));
998 to->nentries = from->nentries;
999 to->depth = from->depth;
1000 }
1001
1002 info_ptr->splt_palettes = np;
1003 info_ptr->splt_palettes_num += nentries;
1004 info_ptr->valid |= PNG_INFO_sPLT;
1005 #ifdef PNG_FREE_ME_SUPPORTED
1006 info_ptr->free_me |= PNG_FREE_SPLT;
1007 #endif
1008 }
1009 #endif /* PNG_sPLT_SUPPORTED */
1010
1011 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1012 void PNGAPI
1013 png_set_unknown_chunks(png_structp png_ptr,
1014 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
1015 {
1016 png_unknown_chunkp np;
1017 int i;
1018
1019 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
1020 return;
1021
1022 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
1023 (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
1024 png_sizeof(png_unknown_chunk)));
1025 if (np == NULL)
1026 {
1027 png_warning(png_ptr,
1028 "Out of memory while processing unknown chunk.");
1029 return;
1030 }
1031
1032 png_memcpy(np, info_ptr->unknown_chunks,
1033 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
1034 png_free(png_ptr, info_ptr->unknown_chunks);
1035 info_ptr->unknown_chunks=NULL;
1036
1037 for (i = 0; i < num_unknowns; i++)
1038 {
1039 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
1040 png_unknown_chunkp from = unknowns + i;
1041
1042 png_memcpy((png_charp)to->name,
1043 (png_charp)from->name,
1044 png_sizeof(from->name));
1045 to->name[png_sizeof(to->name)-1] = '\0';
1046 to->size = from->size;
1047 /* Note our location in the read or write sequence */
1048 to->location = (png_byte)(png_ptr->mode & 0xff);
1049
1050 if (from->size == 0)
1051 to->data=NULL;
1052 else
1053 {
1054 to->data = (png_bytep)png_malloc_warn(png_ptr,
1055 (png_uint_32)from->size);
1056 if (to->data == NULL)
1057 {
1058 png_warning(png_ptr,
1059 "Out of memory while processing unknown chunk.");
1060 to->size = 0;
1061 }
1062 else
1063 png_memcpy(to->data, from->data, from->size);
1064 }
1065 }
1066
1067 info_ptr->unknown_chunks = np;
1068 info_ptr->unknown_chunks_num += num_unknowns;
1069 #ifdef PNG_FREE_ME_SUPPORTED
1070 info_ptr->free_me |= PNG_FREE_UNKN;
1071 #endif
1072 }
1073 void PNGAPI
1074 png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1075 int chunk, int location)
1076 {
1077 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1078 (int)info_ptr->unknown_chunks_num)
1079 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1080 }
1081 #endif
1082
1083 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1084 #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
1085 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
1086 void PNGAPI
1087 png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
1088 {
1089 /* This function is deprecated in favor of png_permit_mng_features()
1090 and will be removed from libpng-1.3.0 */
1091 png_debug(1, "in png_permit_empty_plte, DEPRECATED.");
1092 if (png_ptr == NULL)
1093 return;
1094 png_ptr->mng_features_permitted = (png_byte)
1095 ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
1096 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
1097 }
1098 #endif
1099 #endif
1100
1101 #if defined(PNG_MNG_FEATURES_SUPPORTED)
1102 png_uint_32 PNGAPI
1103 png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1104 {
1105 png_debug(1, "in png_permit_mng_features");
1106 if (png_ptr == NULL)
1107 return (png_uint_32)0;
1108 png_ptr->mng_features_permitted =
1109 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1110 return (png_uint_32)png_ptr->mng_features_permitted;
1111 }
1112 #endif
1113
1114 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1115 void PNGAPI
1116 png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
1117 chunk_list, int num_chunks)
1118 {
1119 png_bytep new_list, p;
1120 int i, old_num_chunks;
1121 if (png_ptr == NULL)
1122 return;
1123 if (num_chunks == 0)
1124 {
1125 if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1126 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1127 else
1128 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1129
1130 if (keep == PNG_HANDLE_CHUNK_ALWAYS)
1131 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1132 else
1133 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1134 return;
1135 }
1136 if (chunk_list == NULL)
1137 return;
1138 old_num_chunks = png_ptr->num_chunk_list;
1139 new_list=(png_bytep)png_malloc(png_ptr,
1140 (png_uint_32)
1141 (5*(num_chunks + old_num_chunks)));
1142 if (png_ptr->chunk_list != NULL)
1143 {
1144 png_memcpy(new_list, png_ptr->chunk_list,
1145 (png_size_t)(5*old_num_chunks));
1146 png_free(png_ptr, png_ptr->chunk_list);
1147 png_ptr->chunk_list=NULL;
1148 }
1149 png_memcpy(new_list + 5*old_num_chunks, chunk_list,
1150 (png_size_t)(5*num_chunks));
1151 for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
1152 *p=(png_byte)keep;
1153 png_ptr->num_chunk_list = old_num_chunks + num_chunks;
1154 png_ptr->chunk_list = new_list;
1155 #ifdef PNG_FREE_ME_SUPPORTED
1156 png_ptr->free_me |= PNG_FREE_LIST;
1157 #endif
1158 }
1159 #endif
1160
1161 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
1162 void PNGAPI
1163 png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1164 png_user_chunk_ptr read_user_chunk_fn)
1165 {
1166 png_debug(1, "in png_set_read_user_chunk_fn");
1167 if (png_ptr == NULL)
1168 return;
1169 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1170 png_ptr->user_chunk_ptr = user_chunk_ptr;
1171 }
1172 #endif
1173
1174 #if defined(PNG_INFO_IMAGE_SUPPORTED)
1175 void PNGAPI
1176 png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1177 {
1178 png_debug1(1, "in %s storage function", "rows");
1179
1180 if (png_ptr == NULL || info_ptr == NULL)
1181 return;
1182
1183 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1184 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1185 info_ptr->row_pointers = row_pointers;
1186 if (row_pointers)
1187 info_ptr->valid |= PNG_INFO_IDAT;
1188 }
1189 #endif
1190
1191 #ifdef PNG_WRITE_SUPPORTED
1192 void PNGAPI
1193 png_set_compression_buffer_size(png_structp png_ptr,
1194 png_uint_32 size)
1195 {
1196 if (png_ptr == NULL)
1197 return;
1198 png_free(png_ptr, png_ptr->zbuf);
1199 png_ptr->zbuf_size = (png_size_t)size;
1200 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1201 png_ptr->zstream.next_out = png_ptr->zbuf;
1202 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1203 }
1204 #endif
1205
1206 void PNGAPI
1207 png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1208 {
1209 if (png_ptr && info_ptr)
1210 info_ptr->valid &= ~mask;
1211 }
1212
1213
1214 #ifndef PNG_1_0_X
1215 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1216 /* Function was added to libpng 1.2.0 and should always exist by default */
1217 void PNGAPI
1218 png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
1219 {
1220 /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
1221 if (png_ptr != NULL)
1222 png_ptr->asm_flags = 0;
1223 asm_flags = asm_flags; /* Quiet the compiler */
1224 }
1225
1226 /* This function was added to libpng 1.2.0 */
1227 void PNGAPI
1228 png_set_mmx_thresholds (png_structp png_ptr,
1229 png_byte mmx_bitdepth_threshold,
1230 png_uint_32 mmx_rowbytes_threshold)
1231 {
1232 /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
1233 if (png_ptr == NULL)
1234 return;
1235 /* Quiet the compiler */
1236 mmx_bitdepth_threshold = mmx_bitdepth_threshold;
1237 mmx_rowbytes_threshold = mmx_rowbytes_threshold;
1238 }
1239 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1240
1241 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
1242 /* This function was added to libpng 1.2.6 */
1243 void PNGAPI
1244 png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1245 png_uint_32 user_height_max)
1246 {
1247 /* Images with dimensions larger than these limits will be
1248 * rejected by png_set_IHDR(). To accept any PNG datastream
1249 * regardless of dimensions, set both limits to 0x7ffffffL.
1250 */
1251 if (png_ptr == NULL)
1252 return;
1253 png_ptr->user_width_max = user_width_max;
1254 png_ptr->user_height_max = user_height_max;
1255 }
1256 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1257
1258 #endif /* ?PNG_1_0_X */
1259 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

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