source: liacs/MIR2010/SourceCode/cximage/png/pngset.c@ 232

Last change on this file since 232 was 95, checked in by Rick van der Zwet, 15 years ago

Bad boy, improper move of directory
File size: 40.7 KB
RevLine 
[95]1
2/* pngset.c - storage of image information into info struct
3 *
4 * Last changed in libpng 1.2.17 May 15, 2007
5 * For conditions of distribution and use, see copyright notice in png.h
6 * Copyright (c) 1998-2007 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_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
20
21#if defined(PNG_bKGD_SUPPORTED)
22void PNGAPI
23png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
24{
25 png_debug1(1, "in %s storage function\n", "bKGD");
26 if (png_ptr == NULL || info_ptr == NULL)
27 return;
28
29 png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
30 info_ptr->valid |= PNG_INFO_bKGD;
31}
32#endif
33
34#if defined(PNG_cHRM_SUPPORTED)
35#ifdef PNG_FLOATING_POINT_SUPPORTED
36void PNGAPI
37png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
38 double white_x, double white_y, double red_x, double red_y,
39 double green_x, double green_y, double blue_x, double blue_y)
40{
41 png_debug1(1, "in %s storage function\n", "cHRM");
42 if (png_ptr == NULL || info_ptr == NULL)
43 return;
44
45 if (white_x < 0.0 || white_y < 0.0 ||
46 red_x < 0.0 || red_y < 0.0 ||
47 green_x < 0.0 || green_y < 0.0 ||
48 blue_x < 0.0 || blue_y < 0.0)
49 {
50 png_warning(png_ptr,
51 "Ignoring attempt to set negative chromaticity value");
52 return;
53 }
54 if (white_x > 21474.83 || white_y > 21474.83 ||
55 red_x > 21474.83 || red_y > 21474.83 ||
56 green_x > 21474.83 || green_y > 21474.83 ||
57 blue_x > 21474.83 || blue_y > 21474.83)
58 {
59 png_warning(png_ptr,
60 "Ignoring attempt to set chromaticity value exceeding 21474.83");
61 return;
62 }
63
64 info_ptr->x_white = (float)white_x;
65 info_ptr->y_white = (float)white_y;
66 info_ptr->x_red = (float)red_x;
67 info_ptr->y_red = (float)red_y;
68 info_ptr->x_green = (float)green_x;
69 info_ptr->y_green = (float)green_y;
70 info_ptr->x_blue = (float)blue_x;
71 info_ptr->y_blue = (float)blue_y;
72#ifdef PNG_FIXED_POINT_SUPPORTED
73 info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
74 info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
75 info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
76 info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
77 info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
78 info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
79 info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
80 info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
81#endif
82 info_ptr->valid |= PNG_INFO_cHRM;
83}
84#endif
85#ifdef PNG_FIXED_POINT_SUPPORTED
86void PNGAPI
87png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
88 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
89 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
90 png_fixed_point blue_x, png_fixed_point blue_y)
91{
92 png_debug1(1, "in %s storage function\n", "cHRM");
93 if (png_ptr == NULL || info_ptr == NULL)
94 return;
95
96 if (white_x < 0 || white_y < 0 ||
97 red_x < 0 || red_y < 0 ||
98 green_x < 0 || green_y < 0 ||
99 blue_x < 0 || blue_y < 0)
100 {
101 png_warning(png_ptr,
102 "Ignoring attempt to set negative chromaticity value");
103 return;
104 }
105#ifdef PNG_FLOATING_POINT_SUPPORTED
106 if (white_x > (double) PNG_UINT_31_MAX ||
107 white_y > (double) PNG_UINT_31_MAX ||
108 red_x > (double) PNG_UINT_31_MAX ||
109 red_y > (double) PNG_UINT_31_MAX ||
110 green_x > (double) PNG_UINT_31_MAX ||
111 green_y > (double) PNG_UINT_31_MAX ||
112 blue_x > (double) PNG_UINT_31_MAX ||
113 blue_y > (double) PNG_UINT_31_MAX)
114#else
115 if (white_x > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
116 white_y > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
117 red_x > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
118 red_y > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
119 green_x > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
120 green_y > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
121 blue_x > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
122 blue_y > (png_fixed_point) PNG_UINT_31_MAX/100000L)
123#endif
124 {
125 png_warning(png_ptr,
126 "Ignoring attempt to set chromaticity value exceeding 21474.83");
127 return;
128 }
129 info_ptr->int_x_white = white_x;
130 info_ptr->int_y_white = white_y;
131 info_ptr->int_x_red = red_x;
132 info_ptr->int_y_red = red_y;
133 info_ptr->int_x_green = green_x;
134 info_ptr->int_y_green = green_y;
135 info_ptr->int_x_blue = blue_x;
136 info_ptr->int_y_blue = blue_y;
137#ifdef PNG_FLOATING_POINT_SUPPORTED
138 info_ptr->x_white = (float)(white_x/100000.);
139 info_ptr->y_white = (float)(white_y/100000.);
140 info_ptr->x_red = (float)( red_x/100000.);
141 info_ptr->y_red = (float)( red_y/100000.);
142 info_ptr->x_green = (float)(green_x/100000.);
143 info_ptr->y_green = (float)(green_y/100000.);
144 info_ptr->x_blue = (float)( blue_x/100000.);
145 info_ptr->y_blue = (float)( blue_y/100000.);
146#endif
147 info_ptr->valid |= PNG_INFO_cHRM;
148}
149#endif
150#endif
151
152#if defined(PNG_gAMA_SUPPORTED)
153#ifdef PNG_FLOATING_POINT_SUPPORTED
154void PNGAPI
155png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
156{
157 double gamma;
158 png_debug1(1, "in %s storage function\n", "gAMA");
159 if (png_ptr == NULL || info_ptr == NULL)
160 return;
161
162 /* Check for overflow */
163 if (file_gamma > 21474.83)
164 {
165 png_warning(png_ptr, "Limiting gamma to 21474.83");
166 gamma=21474.83;
167 }
168 else
169 gamma=file_gamma;
170 info_ptr->gamma = (float)gamma;
171#ifdef PNG_FIXED_POINT_SUPPORTED
172 info_ptr->int_gamma = (int)(gamma*100000.+.5);
173#endif
174 info_ptr->valid |= PNG_INFO_gAMA;
175 if(gamma == 0.0)
176 png_warning(png_ptr, "Setting gamma=0");
177}
178#endif
179void PNGAPI
180png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
181 int_gamma)
182{
183 png_fixed_point gamma;
184
185 png_debug1(1, "in %s storage function\n", "gAMA");
186 if (png_ptr == NULL || info_ptr == NULL)
187 return;
188
189 if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
190 {
191 png_warning(png_ptr, "Limiting gamma to 21474.83");
192 gamma=PNG_UINT_31_MAX;
193 }
194 else
195 {
196 if (int_gamma < 0)
197 {
198 png_warning(png_ptr, "Setting negative gamma to zero");
199 gamma=0;
200 }
201 else
202 gamma=int_gamma;
203 }
204#ifdef PNG_FLOATING_POINT_SUPPORTED
205 info_ptr->gamma = (float)(gamma/100000.);
206#endif
207#ifdef PNG_FIXED_POINT_SUPPORTED
208 info_ptr->int_gamma = gamma;
209#endif
210 info_ptr->valid |= PNG_INFO_gAMA;
211 if(gamma == 0)
212 png_warning(png_ptr, "Setting gamma=0");
213}
214#endif
215
216#if defined(PNG_hIST_SUPPORTED)
217void PNGAPI
218png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
219{
220 int i;
221
222 png_debug1(1, "in %s storage function\n", "hIST");
223 if (png_ptr == NULL || info_ptr == NULL)
224 return;
225 if (info_ptr->num_palette <= 0 || info_ptr->num_palette
226 > PNG_MAX_PALETTE_LENGTH)
227 {
228 png_warning(png_ptr,
229 "Invalid palette size, hIST allocation skipped.");
230 return;
231 }
232
233#ifdef PNG_FREE_ME_SUPPORTED
234 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
235#endif
236 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version
237 1.2.1 */
238 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
239 (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof (png_uint_16)));
240 if (png_ptr->hist == NULL)
241 {
242 png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
243 return;
244 }
245
246 for (i = 0; i < info_ptr->num_palette; i++)
247 png_ptr->hist[i] = hist[i];
248 info_ptr->hist = png_ptr->hist;
249 info_ptr->valid |= PNG_INFO_hIST;
250
251#ifdef PNG_FREE_ME_SUPPORTED
252 info_ptr->free_me |= PNG_FREE_HIST;
253#else
254 png_ptr->flags |= PNG_FLAG_FREE_HIST;
255#endif
256}
257#endif
258
259void PNGAPI
260png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
261 png_uint_32 width, png_uint_32 height, int bit_depth,
262 int color_type, int interlace_type, int compression_type,
263 int filter_type)
264{
265 png_debug1(1, "in %s storage function\n", "IHDR");
266 if (png_ptr == NULL || info_ptr == NULL)
267 return;
268
269 /* check for width and height valid values */
270 if (width == 0 || height == 0)
271 png_error(png_ptr, "Image width or height is zero in IHDR");
272#ifdef PNG_SET_USER_LIMITS_SUPPORTED
273 if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
274 png_error(png_ptr, "image size exceeds user limits in IHDR");
275#else
276 if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
277 png_error(png_ptr, "image size exceeds user limits in IHDR");
278#endif
279 if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
280 png_error(png_ptr, "Invalid image size in IHDR");
281 if ( width > (PNG_UINT_32_MAX
282 >> 3) /* 8-byte RGBA pixels */
283 - 64 /* bigrowbuf hack */
284 - 1 /* filter byte */
285 - 7*8 /* rounding of width to multiple of 8 pixels */
286 - 8) /* extra max_pixel_depth pad */
287 png_warning(png_ptr, "Width is too large for libpng to process pixels");
288
289 /* check other values */
290 if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
291 bit_depth != 8 && bit_depth != 16)
292 png_error(png_ptr, "Invalid bit depth in IHDR");
293
294 if (color_type < 0 || color_type == 1 ||
295 color_type == 5 || color_type > 6)
296 png_error(png_ptr, "Invalid color type in IHDR");
297
298 if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
299 ((color_type == PNG_COLOR_TYPE_RGB ||
300 color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
301 color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
302 png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
303
304 if (interlace_type >= PNG_INTERLACE_LAST)
305 png_error(png_ptr, "Unknown interlace method in IHDR");
306
307 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
308 png_error(png_ptr, "Unknown compression method in IHDR");
309
310#if defined(PNG_MNG_FEATURES_SUPPORTED)
311 /* Accept filter_method 64 (intrapixel differencing) only if
312 * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
313 * 2. Libpng did not read a PNG signature (this filter_method is only
314 * used in PNG datastreams that are embedded in MNG datastreams) and
315 * 3. The application called png_permit_mng_features with a mask that
316 * included PNG_FLAG_MNG_FILTER_64 and
317 * 4. The filter_method is 64 and
318 * 5. The color_type is RGB or RGBA
319 */
320 if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
321 png_warning(png_ptr,"MNG features are not allowed in a PNG datastream");
322 if(filter_type != PNG_FILTER_TYPE_BASE)
323 {
324 if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
325 (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
326 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
327 (color_type == PNG_COLOR_TYPE_RGB ||
328 color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
329 png_error(png_ptr, "Unknown filter method in IHDR");
330 if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
331 png_warning(png_ptr, "Invalid filter method in IHDR");
332 }
333#else
334 if(filter_type != PNG_FILTER_TYPE_BASE)
335 png_error(png_ptr, "Unknown filter method in IHDR");
336#endif
337
338 info_ptr->width = width;
339 info_ptr->height = height;
340 info_ptr->bit_depth = (png_byte)bit_depth;
341 info_ptr->color_type =(png_byte) color_type;
342 info_ptr->compression_type = (png_byte)compression_type;
343 info_ptr->filter_type = (png_byte)filter_type;
344 info_ptr->interlace_type = (png_byte)interlace_type;
345 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
346 info_ptr->channels = 1;
347 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
348 info_ptr->channels = 3;
349 else
350 info_ptr->channels = 1;
351 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
352 info_ptr->channels++;
353 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
354
355 /* check for potential overflow */
356 if ( width > (PNG_UINT_32_MAX
357 >> 3) /* 8-byte RGBA pixels */
358 - 64 /* bigrowbuf hack */
359 - 1 /* filter byte */
360 - 7*8 /* rounding of width to multiple of 8 pixels */
361 - 8) /* extra max_pixel_depth pad */
362 info_ptr->rowbytes = (png_size_t)0;
363 else
364 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width);
365}
366
367#if defined(PNG_oFFs_SUPPORTED)
368void PNGAPI
369png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
370 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
371{
372 png_debug1(1, "in %s storage function\n", "oFFs");
373 if (png_ptr == NULL || info_ptr == NULL)
374 return;
375
376 info_ptr->x_offset = offset_x;
377 info_ptr->y_offset = offset_y;
378 info_ptr->offset_unit_type = (png_byte)unit_type;
379 info_ptr->valid |= PNG_INFO_oFFs;
380}
381#endif
382
383#if defined(PNG_pCAL_SUPPORTED)
384void PNGAPI
385png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
386 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
387 png_charp units, png_charpp params)
388{
389 png_uint_32 length;
390 int i;
391
392 png_debug1(1, "in %s storage function\n", "pCAL");
393 if (png_ptr == NULL || info_ptr == NULL)
394 return;
395
396 length = png_strlen(purpose) + 1;
397 png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
398 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
399 if (info_ptr->pcal_purpose == NULL)
400 {
401 png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
402 return;
403 }
404 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
405
406 png_debug(3, "storing X0, X1, type, and nparams in info\n");
407 info_ptr->pcal_X0 = X0;
408 info_ptr->pcal_X1 = X1;
409 info_ptr->pcal_type = (png_byte)type;
410 info_ptr->pcal_nparams = (png_byte)nparams;
411
412 length = png_strlen(units) + 1;
413 png_debug1(3, "allocating units for info (%lu bytes)\n", length);
414 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
415 if (info_ptr->pcal_units == NULL)
416 {
417 png_warning(png_ptr, "Insufficient memory for pCAL units.");
418 return;
419 }
420 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
421
422 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
423 (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
424 if (info_ptr->pcal_params == NULL)
425 {
426 png_warning(png_ptr, "Insufficient memory for pCAL params.");
427 return;
428 }
429
430 info_ptr->pcal_params[nparams] = NULL;
431
432 for (i = 0; i < nparams; i++)
433 {
434 length = png_strlen(params[i]) + 1;
435 png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
436 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
437 if (info_ptr->pcal_params[i] == NULL)
438 {
439 png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
440 return;
441 }
442 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
443 }
444
445 info_ptr->valid |= PNG_INFO_pCAL;
446#ifdef PNG_FREE_ME_SUPPORTED
447 info_ptr->free_me |= PNG_FREE_PCAL;
448#endif
449}
450#endif
451
452#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
453#ifdef PNG_FLOATING_POINT_SUPPORTED
454void PNGAPI
455png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
456 int unit, double width, double height)
457{
458 png_debug1(1, "in %s storage function\n", "sCAL");
459 if (png_ptr == NULL || info_ptr == NULL)
460 return;
461
462 info_ptr->scal_unit = (png_byte)unit;
463 info_ptr->scal_pixel_width = width;
464 info_ptr->scal_pixel_height = height;
465
466 info_ptr->valid |= PNG_INFO_sCAL;
467}
468#else
469#ifdef PNG_FIXED_POINT_SUPPORTED
470void PNGAPI
471png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
472 int unit, png_charp swidth, png_charp sheight)
473{
474 png_uint_32 length;
475
476 png_debug1(1, "in %s storage function\n", "sCAL");
477 if (png_ptr == NULL || info_ptr == NULL)
478 return;
479
480 info_ptr->scal_unit = (png_byte)unit;
481
482 length = png_strlen(swidth) + 1;
483 png_debug1(3, "allocating unit for info (%d bytes)\n", length);
484 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
485 if (info_ptr->scal_s_width == NULL)
486 {
487 png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
488 }
489 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
490
491 length = png_strlen(sheight) + 1;
492 png_debug1(3, "allocating unit for info (%d bytes)\n", length);
493 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
494 if (info_ptr->scal_s_height == NULL)
495 {
496 png_free (png_ptr, info_ptr->scal_s_width);
497 png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
498 }
499 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
500
501 info_ptr->valid |= PNG_INFO_sCAL;
502#ifdef PNG_FREE_ME_SUPPORTED
503 info_ptr->free_me |= PNG_FREE_SCAL;
504#endif
505}
506#endif
507#endif
508#endif
509
510#if defined(PNG_pHYs_SUPPORTED)
511void PNGAPI
512png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
513 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
514{
515 png_debug1(1, "in %s storage function\n", "pHYs");
516 if (png_ptr == NULL || info_ptr == NULL)
517 return;
518
519 info_ptr->x_pixels_per_unit = res_x;
520 info_ptr->y_pixels_per_unit = res_y;
521 info_ptr->phys_unit_type = (png_byte)unit_type;
522 info_ptr->valid |= PNG_INFO_pHYs;
523}
524#endif
525
526void PNGAPI
527png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
528 png_colorp palette, int num_palette)
529{
530
531 png_debug1(1, "in %s storage function\n", "PLTE");
532 if (png_ptr == NULL || info_ptr == NULL)
533 return;
534
535 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
536 {
537 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
538 png_error(png_ptr, "Invalid palette length");
539 else
540 {
541 png_warning(png_ptr, "Invalid palette length");
542 return;
543 }
544 }
545
546 /*
547 * It may not actually be necessary to set png_ptr->palette here;
548 * we do it for backward compatibility with the way the png_handle_tRNS
549 * function used to do the allocation.
550 */
551#ifdef PNG_FREE_ME_SUPPORTED
552 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
553#endif
554
555 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
556 of num_palette entries,
557 in case of an invalid PNG file that has too-large sample values. */
558 png_ptr->palette = (png_colorp)png_malloc(png_ptr,
559 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
560 png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
561 png_sizeof(png_color));
562 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color));
563 info_ptr->palette = png_ptr->palette;
564 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
565
566#ifdef PNG_FREE_ME_SUPPORTED
567 info_ptr->free_me |= PNG_FREE_PLTE;
568#else
569 png_ptr->flags |= PNG_FLAG_FREE_PLTE;
570#endif
571
572 info_ptr->valid |= PNG_INFO_PLTE;
573}
574
575#if defined(PNG_sBIT_SUPPORTED)
576void PNGAPI
577png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
578 png_color_8p sig_bit)
579{
580 png_debug1(1, "in %s storage function\n", "sBIT");
581 if (png_ptr == NULL || info_ptr == NULL)
582 return;
583
584 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof (png_color_8));
585 info_ptr->valid |= PNG_INFO_sBIT;
586}
587#endif
588
589#if defined(PNG_sRGB_SUPPORTED)
590void PNGAPI
591png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
592{
593 png_debug1(1, "in %s storage function\n", "sRGB");
594 if (png_ptr == NULL || info_ptr == NULL)
595 return;
596
597 info_ptr->srgb_intent = (png_byte)intent;
598 info_ptr->valid |= PNG_INFO_sRGB;
599}
600
601void PNGAPI
602png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
603 int intent)
604{
605#if defined(PNG_gAMA_SUPPORTED)
606#ifdef PNG_FLOATING_POINT_SUPPORTED
607 float file_gamma;
608#endif
609#ifdef PNG_FIXED_POINT_SUPPORTED
610 png_fixed_point int_file_gamma;
611#endif
612#endif
613#if defined(PNG_cHRM_SUPPORTED)
614#ifdef PNG_FLOATING_POINT_SUPPORTED
615 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
616#endif
617#ifdef PNG_FIXED_POINT_SUPPORTED
618 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
619 int_green_y, int_blue_x, int_blue_y;
620#endif
621#endif
622 png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
623 if (png_ptr == NULL || info_ptr == NULL)
624 return;
625
626 png_set_sRGB(png_ptr, info_ptr, intent);
627
628#if defined(PNG_gAMA_SUPPORTED)
629#ifdef PNG_FLOATING_POINT_SUPPORTED
630 file_gamma = (float).45455;
631 png_set_gAMA(png_ptr, info_ptr, file_gamma);
632#endif
633#ifdef PNG_FIXED_POINT_SUPPORTED
634 int_file_gamma = 45455L;
635 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
636#endif
637#endif
638
639#if defined(PNG_cHRM_SUPPORTED)
640#ifdef PNG_FIXED_POINT_SUPPORTED
641 int_white_x = 31270L;
642 int_white_y = 32900L;
643 int_red_x = 64000L;
644 int_red_y = 33000L;
645 int_green_x = 30000L;
646 int_green_y = 60000L;
647 int_blue_x = 15000L;
648 int_blue_y = 6000L;
649
650 png_set_cHRM_fixed(png_ptr, info_ptr,
651 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
652 int_blue_x, int_blue_y);
653#endif
654#ifdef PNG_FLOATING_POINT_SUPPORTED
655 white_x = (float).3127;
656 white_y = (float).3290;
657 red_x = (float).64;
658 red_y = (float).33;
659 green_x = (float).30;
660 green_y = (float).60;
661 blue_x = (float).15;
662 blue_y = (float).06;
663
664 png_set_cHRM(png_ptr, info_ptr,
665 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
666#endif
667#endif
668}
669#endif
670
671
672#if defined(PNG_iCCP_SUPPORTED)
673void PNGAPI
674png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
675 png_charp name, int compression_type,
676 png_charp profile, png_uint_32 proflen)
677{
678 png_charp new_iccp_name;
679 png_charp new_iccp_profile;
680
681 png_debug1(1, "in %s storage function\n", "iCCP");
682 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
683 return;
684
685 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, png_strlen(name)+1);
686 if (new_iccp_name == NULL)
687 {
688 png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
689 return;
690 }
691 png_strcpy(new_iccp_name, name);
692 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
693 if (new_iccp_profile == NULL)
694 {
695 png_free (png_ptr, new_iccp_name);
696 png_warning(png_ptr, "Insufficient memory to process iCCP profile.");
697 return;
698 }
699 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
700
701 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
702
703 info_ptr->iccp_proflen = proflen;
704 info_ptr->iccp_name = new_iccp_name;
705 info_ptr->iccp_profile = new_iccp_profile;
706 /* Compression is always zero but is here so the API and info structure
707 * does not have to change if we introduce multiple compression types */
708 info_ptr->iccp_compression = (png_byte)compression_type;
709#ifdef PNG_FREE_ME_SUPPORTED
710 info_ptr->free_me |= PNG_FREE_ICCP;
711#endif
712 info_ptr->valid |= PNG_INFO_iCCP;
713}
714#endif
715
716#if defined(PNG_TEXT_SUPPORTED)
717void PNGAPI
718png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
719 int num_text)
720{
721 int ret;
722 ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
723 if (ret)
724 png_error(png_ptr, "Insufficient memory to store text");
725}
726
727int /* PRIVATE */
728png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
729 int num_text)
730{
731 int i;
732
733 png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
734 "text" : (png_const_charp)png_ptr->chunk_name));
735
736 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
737 return(0);
738
739 /* Make sure we have enough space in the "text" array in info_struct
740 * to hold all of the incoming text_ptr objects.
741 */
742 if (info_ptr->num_text + num_text > info_ptr->max_text)
743 {
744 if (info_ptr->text != NULL)
745 {
746 png_textp old_text;
747 int old_max;
748
749 old_max = info_ptr->max_text;
750 info_ptr->max_text = info_ptr->num_text + num_text + 8;
751 old_text = info_ptr->text;
752 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
753 (png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
754 if (info_ptr->text == NULL)
755 {
756 png_free(png_ptr, old_text);
757 return(1);
758 }
759 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
760 png_sizeof(png_text)));
761 png_free(png_ptr, old_text);
762 }
763 else
764 {
765 info_ptr->max_text = num_text + 8;
766 info_ptr->num_text = 0;
767 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
768 (png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
769 if (info_ptr->text == NULL)
770 return(1);
771#ifdef PNG_FREE_ME_SUPPORTED
772 info_ptr->free_me |= PNG_FREE_TEXT;
773#endif
774 }
775 png_debug1(3, "allocated %d entries for info_ptr->text\n",
776 info_ptr->max_text);
777 }
778 for (i = 0; i < num_text; i++)
779 {
780 png_size_t text_length,key_len;
781 png_size_t lang_len,lang_key_len;
782 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
783
784 if (text_ptr[i].key == NULL)
785 continue;
786
787 key_len = png_strlen(text_ptr[i].key);
788
789 if(text_ptr[i].compression <= 0)
790 {
791 lang_len = 0;
792 lang_key_len = 0;
793 }
794 else
795#ifdef PNG_iTXt_SUPPORTED
796 {
797 /* set iTXt data */
798 if (text_ptr[i].lang != NULL)
799 lang_len = png_strlen(text_ptr[i].lang);
800 else
801 lang_len = 0;
802 if (text_ptr[i].lang_key != NULL)
803 lang_key_len = png_strlen(text_ptr[i].lang_key);
804 else
805 lang_key_len = 0;
806 }
807#else
808 {
809 png_warning(png_ptr, "iTXt chunk not supported.");
810 continue;
811 }
812#endif
813
814 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
815 {
816 text_length = 0;
817#ifdef PNG_iTXt_SUPPORTED
818 if(text_ptr[i].compression > 0)
819 textp->compression = PNG_ITXT_COMPRESSION_NONE;
820 else
821#endif
822 textp->compression = PNG_TEXT_COMPRESSION_NONE;
823 }
824 else
825 {
826 text_length = png_strlen(text_ptr[i].text);
827 textp->compression = text_ptr[i].compression;
828 }
829
830 textp->key = (png_charp)png_malloc_warn(png_ptr,
831 (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
832 if (textp->key == NULL)
833 return(1);
834 png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
835 (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
836 (int)textp->key);
837
838 png_memcpy(textp->key, text_ptr[i].key,
839 (png_size_t)(key_len));
840 *(textp->key+key_len) = '\0';
841#ifdef PNG_iTXt_SUPPORTED
842 if (text_ptr[i].compression > 0)
843 {
844 textp->lang=textp->key + key_len + 1;
845 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
846 *(textp->lang+lang_len) = '\0';
847 textp->lang_key=textp->lang + lang_len + 1;
848 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
849 *(textp->lang_key+lang_key_len) = '\0';
850 textp->text=textp->lang_key + lang_key_len + 1;
851 }
852 else
853#endif
854 {
855#ifdef PNG_iTXt_SUPPORTED
856 textp->lang=NULL;
857 textp->lang_key=NULL;
858#endif
859 textp->text=textp->key + key_len + 1;
860 }
861 if(text_length)
862 png_memcpy(textp->text, text_ptr[i].text,
863 (png_size_t)(text_length));
864 *(textp->text+text_length) = '\0';
865
866#ifdef PNG_iTXt_SUPPORTED
867 if(textp->compression > 0)
868 {
869 textp->text_length = 0;
870 textp->itxt_length = text_length;
871 }
872 else
873#endif
874 {
875 textp->text_length = text_length;
876#ifdef PNG_iTXt_SUPPORTED
877 textp->itxt_length = 0;
878#endif
879 }
880#if 0 /* appears to be redundant; */
881 info_ptr->text[info_ptr->num_text]= *textp;
882#endif
883 info_ptr->num_text++;
884 png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
885 }
886 return(0);
887}
888#endif
889
890#if defined(PNG_tIME_SUPPORTED)
891void PNGAPI
892png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
893{
894 png_debug1(1, "in %s storage function\n", "tIME");
895 if (png_ptr == NULL || info_ptr == NULL ||
896 (png_ptr->mode & PNG_WROTE_tIME))
897 return;
898
899 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof (png_time));
900 info_ptr->valid |= PNG_INFO_tIME;
901}
902#endif
903
904#if defined(PNG_tRNS_SUPPORTED)
905void PNGAPI
906png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
907 png_bytep trans, int num_trans, png_color_16p trans_values)
908{
909 png_debug1(1, "in %s storage function\n", "tRNS");
910 if (png_ptr == NULL || info_ptr == NULL)
911 return;
912
913 if (trans != NULL)
914 {
915 /*
916 * It may not actually be necessary to set png_ptr->trans here;
917 * we do it for backward compatibility with the way the png_handle_tRNS
918 * function used to do the allocation.
919 */
920#ifdef PNG_FREE_ME_SUPPORTED
921 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
922#endif
923 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
924 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
925 (png_uint_32)PNG_MAX_PALETTE_LENGTH);
926 if (num_trans <= PNG_MAX_PALETTE_LENGTH)
927 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
928#ifdef PNG_FREE_ME_SUPPORTED
929 info_ptr->free_me |= PNG_FREE_TRNS;
930#else
931 png_ptr->flags |= PNG_FLAG_FREE_TRNS;
932#endif
933 }
934
935 if (trans_values != NULL)
936 {
937 png_memcpy(&(info_ptr->trans_values), trans_values,
938 png_sizeof(png_color_16));
939 if (num_trans == 0)
940 num_trans = 1;
941 }
942 info_ptr->num_trans = (png_uint_16)num_trans;
943 info_ptr->valid |= PNG_INFO_tRNS;
944}
945#endif
946
947#if defined(PNG_sPLT_SUPPORTED)
948void PNGAPI
949png_set_sPLT(png_structp png_ptr,
950 png_infop info_ptr, png_sPLT_tp entries, int nentries)
951{
952 png_sPLT_tp np;
953 int i;
954
955 if (png_ptr == NULL || info_ptr == NULL)
956 return;
957
958 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
959 (info_ptr->splt_palettes_num + nentries) * 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
976 to->name = (png_charp)png_malloc(png_ptr,
977 png_strlen(from->name) + 1);
978 /* TODO: use png_malloc_warn */
979 png_strcpy(to->name, from->name);
980 to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
981 from->nentries * png_sizeof(png_sPLT_entry));
982 /* TODO: use png_malloc_warn */
983 png_memcpy(to->entries, from->entries,
984 from->nentries * png_sizeof(png_sPLT_entry));
985 to->nentries = from->nentries;
986 to->depth = from->depth;
987 }
988
989 info_ptr->splt_palettes = np;
990 info_ptr->splt_palettes_num += nentries;
991 info_ptr->valid |= PNG_INFO_sPLT;
992#ifdef PNG_FREE_ME_SUPPORTED
993 info_ptr->free_me |= PNG_FREE_SPLT;
994#endif
995}
996#endif /* PNG_sPLT_SUPPORTED */
997
998#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
999void PNGAPI
1000png_set_unknown_chunks(png_structp png_ptr,
1001 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
1002{
1003 png_unknown_chunkp np;
1004 int i;
1005
1006 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
1007 return;
1008
1009 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
1010 (info_ptr->unknown_chunks_num + num_unknowns) *
1011 png_sizeof(png_unknown_chunk));
1012 if (np == NULL)
1013 {
1014 png_warning(png_ptr, "Out of memory while processing unknown chunk.");
1015 return;
1016 }
1017
1018 png_memcpy(np, info_ptr->unknown_chunks,
1019 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
1020 png_free(png_ptr, info_ptr->unknown_chunks);
1021 info_ptr->unknown_chunks=NULL;
1022
1023 for (i = 0; i < num_unknowns; i++)
1024 {
1025 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
1026 png_unknown_chunkp from = unknowns + i;
1027
1028 png_strncpy((png_charp)to->name, (png_charp)from->name, 5);
1029 to->data = (png_bytep)png_malloc_warn(png_ptr, from->size);
1030 if (to->data == NULL)
1031 {
1032 png_warning(png_ptr, "Out of memory processing unknown chunk.");
1033 }
1034 else
1035 {
1036 png_memcpy(to->data, from->data, from->size);
1037 to->size = from->size;
1038
1039 /* note our location in the read or write sequence */
1040 to->location = (png_byte)(png_ptr->mode & 0xff);
1041 }
1042 }
1043
1044 info_ptr->unknown_chunks = np;
1045 info_ptr->unknown_chunks_num += num_unknowns;
1046#ifdef PNG_FREE_ME_SUPPORTED
1047 info_ptr->free_me |= PNG_FREE_UNKN;
1048#endif
1049}
1050void PNGAPI
1051png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1052 int chunk, int location)
1053{
1054 if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1055 (int)info_ptr->unknown_chunks_num)
1056 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1057}
1058#endif
1059
1060#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1061#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
1062 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
1063void PNGAPI
1064png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
1065{
1066 /* This function is deprecated in favor of png_permit_mng_features()
1067 and will be removed from libpng-1.3.0 */
1068 png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
1069 if (png_ptr == NULL)
1070 return;
1071 png_ptr->mng_features_permitted = (png_byte)
1072 ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) |
1073 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
1074}
1075#endif
1076#endif
1077
1078#if defined(PNG_MNG_FEATURES_SUPPORTED)
1079png_uint_32 PNGAPI
1080png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1081{
1082 png_debug(1, "in png_permit_mng_features\n");
1083 if (png_ptr == NULL)
1084 return (png_uint_32)0;
1085 png_ptr->mng_features_permitted =
1086 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1087 return (png_uint_32)png_ptr->mng_features_permitted;
1088}
1089#endif
1090
1091#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1092void PNGAPI
1093png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
1094 chunk_list, int num_chunks)
1095{
1096 png_bytep new_list, p;
1097 int i, old_num_chunks;
1098 if (png_ptr == NULL)
1099 return;
1100 if (num_chunks == 0)
1101 {
1102 if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1103 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1104 else
1105 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1106
1107 if(keep == PNG_HANDLE_CHUNK_ALWAYS)
1108 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1109 else
1110 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1111 return;
1112 }
1113 if (chunk_list == NULL)
1114 return;
1115 old_num_chunks=png_ptr->num_chunk_list;
1116 new_list=(png_bytep)png_malloc(png_ptr,
1117 (png_uint_32)(5*(num_chunks+old_num_chunks)));
1118 if(png_ptr->chunk_list != NULL)
1119 {
1120 png_memcpy(new_list, png_ptr->chunk_list,
1121 (png_size_t)(5*old_num_chunks));
1122 png_free(png_ptr, png_ptr->chunk_list);
1123 png_ptr->chunk_list=NULL;
1124 }
1125 png_memcpy(new_list+5*old_num_chunks, chunk_list,
1126 (png_size_t)(5*num_chunks));
1127 for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
1128 *p=(png_byte)keep;
1129 png_ptr->num_chunk_list=old_num_chunks+num_chunks;
1130 png_ptr->chunk_list=new_list;
1131#ifdef PNG_FREE_ME_SUPPORTED
1132 png_ptr->free_me |= PNG_FREE_LIST;
1133#endif
1134}
1135#endif
1136
1137#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
1138void PNGAPI
1139png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1140 png_user_chunk_ptr read_user_chunk_fn)
1141{
1142 png_debug(1, "in png_set_read_user_chunk_fn\n");
1143 if (png_ptr == NULL)
1144 return;
1145 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1146 png_ptr->user_chunk_ptr = user_chunk_ptr;
1147}
1148#endif
1149
1150#if defined(PNG_INFO_IMAGE_SUPPORTED)
1151void PNGAPI
1152png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1153{
1154 png_debug1(1, "in %s storage function\n", "rows");
1155
1156 if (png_ptr == NULL || info_ptr == NULL)
1157 return;
1158
1159 if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1160 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1161 info_ptr->row_pointers = row_pointers;
1162 if(row_pointers)
1163 info_ptr->valid |= PNG_INFO_IDAT;
1164}
1165#endif
1166
1167#ifdef PNG_WRITE_SUPPORTED
1168void PNGAPI
1169png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
1170{
1171 if (png_ptr == NULL)
1172 return;
1173 if(png_ptr->zbuf)
1174 png_free(png_ptr, png_ptr->zbuf);
1175 png_ptr->zbuf_size = (png_size_t)size;
1176 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1177 png_ptr->zstream.next_out = png_ptr->zbuf;
1178 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1179}
1180#endif
1181
1182void PNGAPI
1183png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1184{
1185 if (png_ptr && info_ptr)
1186 info_ptr->valid &= ~(mask);
1187}
1188
1189
1190#ifndef PNG_1_0_X
1191#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1192/* this function was added to libpng 1.2.0 and should always exist by default */
1193void PNGAPI
1194png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
1195{
1196#ifdef PNG_MMX_CODE_SUPPORTED
1197 png_uint_32 settable_asm_flags;
1198 png_uint_32 settable_mmx_flags;
1199#endif
1200 if (png_ptr == NULL)
1201 return;
1202#ifdef PNG_MMX_CODE_SUPPORTED
1203
1204 settable_mmx_flags =
1205#ifdef PNG_HAVE_MMX_COMBINE_ROW
1206 PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
1207#endif
1208#ifdef PNG_HAVE_MMX_READ_INTERLACE
1209 PNG_ASM_FLAG_MMX_READ_INTERLACE |
1210#endif
1211#ifdef PNG_HAVE_MMX_READ_FILTER_ROW
1212 PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
1213 PNG_ASM_FLAG_MMX_READ_FILTER_UP |
1214 PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
1215 PNG_ASM_FLAG_MMX_READ_FILTER_PAETH |
1216#endif
1217 0;
1218
1219 /* could be some non-MMX ones in the future, but not currently: */
1220 settable_asm_flags = settable_mmx_flags;
1221
1222 if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) ||
1223 !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU))
1224 {
1225 /* clear all MMX flags if MMX isn't supported */
1226 settable_asm_flags &= ~settable_mmx_flags;
1227 png_ptr->asm_flags &= ~settable_mmx_flags;
1228 }
1229
1230 /* we're replacing the settable bits with those passed in by the user,
1231 * so first zero them out of the master copy, then bitwise-OR in the
1232 * allowed subset that was requested */
1233
1234 png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */
1235 png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */
1236#endif /* ?PNG_MMX_CODE_SUPPORTED */
1237}
1238
1239/* this function was added to libpng 1.2.0 */
1240void PNGAPI
1241png_set_mmx_thresholds (png_structp png_ptr,
1242 png_byte mmx_bitdepth_threshold,
1243 png_uint_32 mmx_rowbytes_threshold)
1244{
1245 if (png_ptr == NULL)
1246 return;
1247#ifdef PNG_MMX_CODE_SUPPORTED
1248 png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
1249 png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
1250#endif /* ?PNG_MMX_CODE_SUPPORTED */
1251}
1252#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1253
1254#ifdef PNG_SET_USER_LIMITS_SUPPORTED
1255/* this function was added to libpng 1.2.6 */
1256void PNGAPI
1257png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1258 png_uint_32 user_height_max)
1259{
1260 /* Images with dimensions larger than these limits will be
1261 * rejected by png_set_IHDR(). To accept any PNG datastream
1262 * regardless of dimensions, set both limits to 0x7ffffffL.
1263 */
1264 if(png_ptr == NULL) return;
1265 png_ptr->user_width_max = user_width_max;
1266 png_ptr->user_height_max = user_height_max;
1267}
1268#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1269
1270#endif /* ?PNG_1_0_X */
1271#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
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