pngset.c@ 62180

最後變更在這個檔案從62180是 58796,由 vboxsync 提交於 9 年前
libpng 1.2.54 unmodified
屬性 svn:eol-style 設為 `native`
檔案大小: 36.4 KB

行
1
2	/* pngset.c - storage of image information into info struct
3	*
4	* Last changed in libpng 1.2.54 [November 12, 2015]
5	* Copyright (c) 1998-2015 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	#define PNG_NO_PEDANTIC_WARNINGS
21	#include "png.h"
22	#if defined(PNG_READ_SUPPORTED) \|\| defined(PNG_WRITE_SUPPORTED)
23
24	#ifdef PNG_bKGD_SUPPORTED
25	void PNGAPI
26	png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
27	{
28	png_debug1(1, "in %s storage function", "bKGD");
29
30	if (png_ptr == NULL \|\| info_ptr == NULL)
31	return;
32
33	png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
34	info_ptr->valid \|= PNG_INFO_bKGD;
35	}
36	#endif
37
38	#ifdef PNG_cHRM_SUPPORTED
39	#ifdef PNG_FLOATING_POINT_SUPPORTED
40	void PNGAPI
41	png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
42	double white_x, double white_y, double red_x, double red_y,
43	double green_x, double green_y, double blue_x, double blue_y)
44	{
45	png_debug1(1, "in %s storage function", "cHRM");
46
47	if (png_ptr == NULL \|\| info_ptr == NULL)
48	return;
49
50	info_ptr->x_white = (float)white_x;
51	info_ptr->y_white = (float)white_y;
52	info_ptr->x_red = (float)red_x;
53	info_ptr->y_red = (float)red_y;
54	info_ptr->x_green = (float)green_x;
55	info_ptr->y_green = (float)green_y;
56	info_ptr->x_blue = (float)blue_x;
57	info_ptr->y_blue = (float)blue_y;
58	#ifdef PNG_FIXED_POINT_SUPPORTED
59	info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
60	info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
61	info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
62	info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
63	info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
64	info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
65	info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
66	info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
67	#endif
68	info_ptr->valid \|= PNG_INFO_cHRM;
69	}
70	#endif /* PNG_FLOATING_POINT_SUPPORTED */
71
72	#ifdef PNG_FIXED_POINT_SUPPORTED
73	void PNGAPI
74	png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
75	png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
76	png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
77	png_fixed_point blue_x, png_fixed_point blue_y)
78	{
79	png_debug1(1, "in %s storage function", "cHRM fixed");
80
81	if (png_ptr == NULL \|\| info_ptr == NULL)
82	return;
83
84	#ifdef PNG_CHECK_cHRM_SUPPORTED
85	if (png_check_cHRM_fixed(png_ptr,
86	white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
87	#endif
88	{
89	info_ptr->int_x_white = white_x;
90	info_ptr->int_y_white = white_y;
91	info_ptr->int_x_red = red_x;
92	info_ptr->int_y_red = red_y;
93	info_ptr->int_x_green = green_x;
94	info_ptr->int_y_green = green_y;
95	info_ptr->int_x_blue = blue_x;
96	info_ptr->int_y_blue = blue_y;
97	#ifdef PNG_FLOATING_POINT_SUPPORTED
98	info_ptr->x_white = (float)(white_x/100000.);
99	info_ptr->y_white = (float)(white_y/100000.);
100	info_ptr->x_red = (float)( red_x/100000.);
101	info_ptr->y_red = (float)( red_y/100000.);
102	info_ptr->x_green = (float)(green_x/100000.);
103	info_ptr->y_green = (float)(green_y/100000.);
104	info_ptr->x_blue = (float)( blue_x/100000.);
105	info_ptr->y_blue = (float)( blue_y/100000.);
106	#endif
107	info_ptr->valid \|= PNG_INFO_cHRM;
108	}
109	}
110	#endif /* PNG_FIXED_POINT_SUPPORTED */
111	#endif /* PNG_cHRM_SUPPORTED */
112
113	#ifdef PNG_gAMA_SUPPORTED
114	#ifdef PNG_FLOATING_POINT_SUPPORTED
115	void PNGAPI
116	png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
117	{
118	double png_gamma;
119
120	png_debug1(1, "in %s storage function", "gAMA");
121
122	if (png_ptr == NULL \|\| info_ptr == NULL)
123	return;
124
125	/* Check for overflow */
126	if (file_gamma > 21474.83)
127	{
128	png_warning(png_ptr, "Limiting gamma to 21474.83");
129	png_gamma=21474.83;
130	}
131	else
132	png_gamma = file_gamma;
133	info_ptr->gamma = (float)png_gamma;
134	#ifdef PNG_FIXED_POINT_SUPPORTED
135	info_ptr->int_gamma = (int)(png_gamma*100000.+.5);
136	#endif
137	info_ptr->valid \|= PNG_INFO_gAMA;
138	if (png_gamma == 0.0)
139	png_warning(png_ptr, "Setting gamma=0");
140	}
141	#endif
142	void PNGAPI
143	png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
144	int_gamma)
145	{
146	png_fixed_point png_gamma;
147
148	png_debug1(1, "in %s storage function", "gAMA");
149
150	if (png_ptr == NULL \|\| info_ptr == NULL)
151	return;
152
153	if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX)
154	{
155	png_warning(png_ptr, "Limiting gamma to 21474.83");
156	png_gamma=PNG_UINT_31_MAX;
157	}
158	else
159	{
160	if (int_gamma < 0)
161	{
162	png_warning(png_ptr, "Setting negative gamma to zero");
163	png_gamma = 0;
164	}
165	else
166	png_gamma = int_gamma;
167	}
168	#ifdef PNG_FLOATING_POINT_SUPPORTED
169	info_ptr->gamma = (float)(png_gamma/100000.);
170	#endif
171	#ifdef PNG_FIXED_POINT_SUPPORTED
172	info_ptr->int_gamma = png_gamma;
173	#endif
174	info_ptr->valid \|= PNG_INFO_gAMA;
175	if (png_gamma == 0)
176	png_warning(png_ptr, "Setting gamma=0");
177	}
178	#endif
179
180	#ifdef PNG_hIST_SUPPORTED
181	void PNGAPI
182	png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
183	{
184	int i;
185
186	png_debug1(1, "in %s storage function", "hIST");
187
188	if (png_ptr == NULL \|\| info_ptr == NULL)
189	return;
190
191	if (info_ptr->num_palette == 0 \|\| info_ptr->num_palette
192	> PNG_MAX_PALETTE_LENGTH)
193	{
194	png_warning(png_ptr,
195	"Invalid palette size, hIST allocation skipped.");
196	return;
197	}
198
199	#ifdef PNG_FREE_ME_SUPPORTED
200	png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
201	#endif
202	/* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
203	* version 1.2.1
204	*/
205	png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
206	(png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
207	if (png_ptr->hist == NULL)
208	{
209	png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
210	return;
211	}
212
213	for (i = 0; i < info_ptr->num_palette; i++)
214	png_ptr->hist[i] = hist[i];
215	info_ptr->hist = png_ptr->hist;
216	info_ptr->valid \|= PNG_INFO_hIST;
217
218	#ifdef PNG_FREE_ME_SUPPORTED
219	info_ptr->free_me \|= PNG_FREE_HIST;
220	#else
221	png_ptr->flags \|= PNG_FLAG_FREE_HIST;
222	#endif
223	}
224	#endif
225
226	void PNGAPI
227	png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
228	png_uint_32 width, png_uint_32 height, int bit_depth,
229	int color_type, int interlace_type, int compression_type,
230	int filter_type)
231	{
232	png_debug1(1, "in %s storage function", "IHDR");
233
234	if (png_ptr == NULL \|\| info_ptr == NULL)
235	return;
236
237	info_ptr->width = width;
238	info_ptr->height = height;
239	info_ptr->bit_depth = (png_byte)bit_depth;
240	info_ptr->color_type = (png_byte)color_type;
241	info_ptr->compression_type = (png_byte)compression_type;
242	info_ptr->filter_type = (png_byte)filter_type;
243	info_ptr->interlace_type = (png_byte)interlace_type;
244
245	png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
246	info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
247	info_ptr->compression_type, info_ptr->filter_type);
248
249	if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
250	info_ptr->channels = 1;
251	else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
252	info_ptr->channels = 3;
253	else
254	info_ptr->channels = 1;
255	if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
256	info_ptr->channels++;
257	info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
258
259	/* Check for potential overflow */
260	if (width > (PNG_UINT_32_MAX
261	>> 3) /* 8-byte RGBA pixels */
262	- 64 /* bigrowbuf hack */
263	- 1 /* filter byte */
264	- 78 / rounding of width to multiple of 8 pixels */
265	- 8) /* extra max_pixel_depth pad */
266	{
267	info_ptr->rowbytes = (png_size_t)0;
268	png_error(png_ptr, "Image width is too large for this architecture");
269	}
270	else
271	info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
272	}
273
274	#ifdef PNG_oFFs_SUPPORTED
275	void PNGAPI
276	png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
277	png_int_32 offset_x, png_int_32 offset_y, int unit_type)
278	{
279	png_debug1(1, "in %s storage function", "oFFs");
280
281	if (png_ptr == NULL \|\| info_ptr == NULL)
282	return;
283
284	info_ptr->x_offset = offset_x;
285	info_ptr->y_offset = offset_y;
286	info_ptr->offset_unit_type = (png_byte)unit_type;
287	info_ptr->valid \|= PNG_INFO_oFFs;
288	}
289	#endif
290
291	#ifdef PNG_pCAL_SUPPORTED
292	void PNGAPI
293	png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
294	png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
295	png_charp units, png_charpp params)
296	{
297	png_uint_32 length;
298	int i;
299
300	png_debug1(1, "in %s storage function", "pCAL");
301
302	if (png_ptr == NULL \|\| info_ptr == NULL)
303	return;
304
305	length = png_strlen(purpose) + 1;
306	png_debug1(3, "allocating purpose for info (%lu bytes)",
307	(unsigned long)length);
308	info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
309	if (info_ptr->pcal_purpose == NULL)
310	{
311	png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
312	return;
313	}
314	png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
315
316	png_debug(3, "storing X0, X1, type, and nparams in info");
317	info_ptr->pcal_X0 = X0;
318	info_ptr->pcal_X1 = X1;
319	info_ptr->pcal_type = (png_byte)type;
320	info_ptr->pcal_nparams = (png_byte)nparams;
321
322	length = png_strlen(units) + 1;
323	png_debug1(3, "allocating units for info (%lu bytes)",
324	(unsigned long)length);
325	info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
326	if (info_ptr->pcal_units == NULL)
327	{
328	png_warning(png_ptr, "Insufficient memory for pCAL units.");
329	return;
330	}
331	png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
332
333	info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
334	(png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
335	if (info_ptr->pcal_params == NULL)
336	{
337	png_warning(png_ptr, "Insufficient memory for pCAL params.");
338	return;
339	}
340
341	png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
342
343	for (i = 0; i < nparams; i++)
344	{
345	length = png_strlen(params[i]) + 1;
346	png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
347	(unsigned long)length);
348	info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
349	if (info_ptr->pcal_params[i] == NULL)
350	{
351	png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
352	return;
353	}
354	png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
355	}
356
357	info_ptr->valid \|= PNG_INFO_pCAL;
358	#ifdef PNG_FREE_ME_SUPPORTED
359	info_ptr->free_me \|= PNG_FREE_PCAL;
360	#endif
361	}
362	#endif
363
364	#if defined(PNG_READ_sCAL_SUPPORTED) \|\| defined(PNG_WRITE_sCAL_SUPPORTED)
365	#ifdef PNG_FLOATING_POINT_SUPPORTED
366	void PNGAPI
367	png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
368	int unit, double width, double height)
369	{
370	png_debug1(1, "in %s storage function", "sCAL");
371
372	if (png_ptr == NULL \|\| info_ptr == NULL)
373	return;
374
375	info_ptr->scal_unit = (png_byte)unit;
376	info_ptr->scal_pixel_width = width;
377	info_ptr->scal_pixel_height = height;
378
379	info_ptr->valid \|= PNG_INFO_sCAL;
380	}
381	#else
382	#ifdef PNG_FIXED_POINT_SUPPORTED
383	void PNGAPI
384	png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
385	int unit, png_charp swidth, png_charp sheight)
386	{
387	png_uint_32 length;
388
389	png_debug1(1, "in %s storage function", "sCAL");
390
391	if (png_ptr == NULL \|\| info_ptr == NULL)
392	return;
393
394	info_ptr->scal_unit = (png_byte)unit;
395
396	length = png_strlen(swidth) + 1;
397	png_debug1(3, "allocating unit for info (%u bytes)",
398	(unsigned int)length);
399	info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
400	if (info_ptr->scal_s_width == NULL)
401	{
402	png_warning(png_ptr,
403	"Memory allocation failed while processing sCAL.");
404	return;
405	}
406	png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
407
408	length = png_strlen(sheight) + 1;
409	png_debug1(3, "allocating unit for info (%u bytes)",
410	(unsigned int)length);
411	info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
412	if (info_ptr->scal_s_height == NULL)
413	{
414	png_free (png_ptr, info_ptr->scal_s_width);
415	info_ptr->scal_s_width = NULL;
416	png_warning(png_ptr,
417	"Memory allocation failed while processing sCAL.");
418	return;
419	}
420	png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
421	info_ptr->valid \|= PNG_INFO_sCAL;
422	#ifdef PNG_FREE_ME_SUPPORTED
423	info_ptr->free_me \|= PNG_FREE_SCAL;
424	#endif
425	}
426	#endif
427	#endif
428	#endif
429
430	#ifdef PNG_pHYs_SUPPORTED
431	void PNGAPI
432	png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
433	png_uint_32 res_x, png_uint_32 res_y, int unit_type)
434	{
435	png_debug1(1, "in %s storage function", "pHYs");
436
437	if (png_ptr == NULL \|\| info_ptr == NULL)
438	return;
439
440	info_ptr->x_pixels_per_unit = res_x;
441	info_ptr->y_pixels_per_unit = res_y;
442	info_ptr->phys_unit_type = (png_byte)unit_type;
443	info_ptr->valid \|= PNG_INFO_pHYs;
444	}
445	#endif
446
447	void PNGAPI
448	png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
449	png_colorp palette, int num_palette)
450	{
451
452	png_uint_32 max_palette_length;
453
454	png_debug1(1, "in %s storage function", "PLTE");
455
456	if (png_ptr == NULL \|\| info_ptr == NULL)
457	return;
458
459	max_palette_length = (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
460	(1 << png_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
461
462	if (num_palette < 0 \|\| num_palette > (int) max_palette_length)
463	{
464	if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
465	png_error(png_ptr, "Invalid palette length");
466	else
467	{
468	png_warning(png_ptr, "Invalid palette length");
469	return;
470	}
471	}
472
473	/* It may not actually be necessary to set png_ptr->palette here;
474	* we do it for backward compatibility with the way the png_handle_tRNS
475	* function used to do the allocation.
476	*/
477	#ifdef PNG_FREE_ME_SUPPORTED
478	png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
479	#endif
480
481	/* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
482	* of num_palette entries, in case of an invalid PNG file or incorrect
483	* call to png_set_PLTE() with too-large sample values.
484	*/
485	png_ptr->palette = (png_colorp)png_calloc(png_ptr,
486	PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
487	png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
488	info_ptr->palette = png_ptr->palette;
489	info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
490
491	#ifdef PNG_FREE_ME_SUPPORTED
492	info_ptr->free_me \|= PNG_FREE_PLTE;
493	#else
494	png_ptr->flags \|= PNG_FLAG_FREE_PLTE;
495	#endif
496
497	info_ptr->valid \|= PNG_INFO_PLTE;
498	}
499
500	#ifdef PNG_sBIT_SUPPORTED
501	void PNGAPI
502	png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
503	png_color_8p sig_bit)
504	{
505	png_debug1(1, "in %s storage function", "sBIT");
506
507	if (png_ptr == NULL \|\| info_ptr == NULL)
508	return;
509
510	png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
511	info_ptr->valid \|= PNG_INFO_sBIT;
512	}
513	#endif
514
515	#ifdef PNG_sRGB_SUPPORTED
516	void PNGAPI
517	png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
518	{
519	png_debug1(1, "in %s storage function", "sRGB");
520
521	if (png_ptr == NULL \|\| info_ptr == NULL)
522	return;
523
524	info_ptr->srgb_intent = (png_byte)intent;
525	info_ptr->valid \|= PNG_INFO_sRGB;
526	}
527
528	void PNGAPI
529	png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
530	int intent)
531	{
532	#ifdef PNG_gAMA_SUPPORTED
533	#ifdef PNG_FLOATING_POINT_SUPPORTED
534	float file_gamma;
535	#endif
536	#ifdef PNG_FIXED_POINT_SUPPORTED
537	png_fixed_point int_file_gamma;
538	#endif
539	#endif
540	#ifdef PNG_cHRM_SUPPORTED
541	#ifdef PNG_FLOATING_POINT_SUPPORTED
542	float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
543	#endif
544	#ifdef PNG_FIXED_POINT_SUPPORTED
545	png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
546	int_green_y, int_blue_x, int_blue_y;
547	#endif
548	#endif
549	png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
550
551	if (png_ptr == NULL \|\| info_ptr == NULL)
552	return;
553
554	png_set_sRGB(png_ptr, info_ptr, intent);
555
556	#ifdef PNG_gAMA_SUPPORTED
557	#ifdef PNG_FLOATING_POINT_SUPPORTED
558	file_gamma = (float).45455;
559	png_set_gAMA(png_ptr, info_ptr, file_gamma);
560	#endif
561	#ifdef PNG_FIXED_POINT_SUPPORTED
562	int_file_gamma = 45455L;
563	png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
564	#endif
565	#endif
566
567	#ifdef PNG_cHRM_SUPPORTED
568	# ifdef PNG_FIXED_POINT_SUPPORTED
569	int_white_x = 31270L;
570	int_white_y = 32900L;
571	int_red_x = 64000L;
572	int_red_y = 33000L;
573	int_green_x = 30000L;
574	int_green_y = 60000L;
575	int_blue_x = 15000L;
576	int_blue_y = 6000L;
577	png_set_cHRM_fixed(png_ptr, info_ptr,
578	int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
579	int_green_y, int_blue_x, int_blue_y);
580	# endif
581
582	# ifdef PNG_FLOATING_POINT_SUPPORTED
583	white_x = (float).3127;
584	white_y = (float).3290;
585	red_x = (float).64;
586	red_y = (float).33;
587	green_x = (float).30;
588	green_y = (float).60;
589	blue_x = (float).15;
590	blue_y = (float).06;
591	png_set_cHRM(png_ptr, info_ptr,
592	white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
593	# endif
594	#endif /* cHRM */
595	}
596	#endif /* sRGB */
597
598
599	#ifdef PNG_iCCP_SUPPORTED
600	void PNGAPI
601	png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
602	png_charp name, int compression_type,
603	png_charp profile, png_uint_32 proflen)
604	{
605	png_charp new_iccp_name;
606	png_charp new_iccp_profile;
607	png_uint_32 length;
608
609	png_debug1(1, "in %s storage function", "iCCP");
610
611	if (png_ptr == NULL \|\| info_ptr == NULL \|\| name == NULL \|\| profile == NULL)
612	return;
613
614	length = png_strlen(name)+1;
615	new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
616	if (new_iccp_name == NULL)
617	{
618	png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
619	return;
620	}
621	png_memcpy(new_iccp_name, name, length);
622	new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
623	if (new_iccp_profile == NULL)
624	{
625	png_free (png_ptr, new_iccp_name);
626	png_warning(png_ptr,
627	"Insufficient memory to process iCCP profile.");
628	return;
629	}
630	png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
631
632	png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
633
634	info_ptr->iccp_proflen = proflen;
635	info_ptr->iccp_name = new_iccp_name;
636	info_ptr->iccp_profile = new_iccp_profile;
637	/* Compression is always zero but is here so the API and info structure
638	* does not have to change if we introduce multiple compression types
639	*/
640	info_ptr->iccp_compression = (png_byte)compression_type;
641	#ifdef PNG_FREE_ME_SUPPORTED
642	info_ptr->free_me \|= PNG_FREE_ICCP;
643	#endif
644	info_ptr->valid \|= PNG_INFO_iCCP;
645	}
646	#endif
647
648	#ifdef PNG_TEXT_SUPPORTED
649	void PNGAPI
650	png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
651	int num_text)
652	{
653	int ret;
654	ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
655	if (ret)
656	png_error(png_ptr, "Insufficient memory to store text");
657	}
658
659	int /* PRIVATE */
660	png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
661	int num_text)
662	{
663	int i;
664
665	png_debug1(1, "in %s storage function", ((png_ptr == NULL \|\|
666	png_ptr->chunk_name[0] == '\0') ?
667	"text" : (png_const_charp)png_ptr->chunk_name));
668
669	if (png_ptr == NULL \|\| info_ptr == NULL \|\| num_text == 0)
670	return(0);
671
672	/* Make sure we have enough space in the "text" array in info_struct
673	* to hold all of the incoming text_ptr objects.
674	*/
675	if (info_ptr->num_text + num_text > info_ptr->max_text)
676	{
677	int old_max_text = info_ptr->max_text;
678	int old_num_text = info_ptr->num_text;
679
680	if (info_ptr->text != NULL)
681	{
682	png_textp old_text;
683
684	info_ptr->max_text = info_ptr->num_text + num_text + 8;
685	old_text = info_ptr->text;
686
687	info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
688	(png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
689	if (info_ptr->text == NULL)
690	{
691	/* Restore to previous condition */
692	info_ptr->max_text = old_max_text;
693	info_ptr->text = old_text;
694	return(1);
695	}
696	png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text *
697	png_sizeof(png_text)));
698	png_free(png_ptr, old_text);
699	}
700	else
701	{
702	info_ptr->max_text = num_text + 8;
703	info_ptr->num_text = 0;
704	info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
705	(png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
706	if (info_ptr->text == NULL)
707	{
708	/* Restore to previous condition */
709	info_ptr->num_text = old_num_text;
710	info_ptr->max_text = old_max_text;
711	return(1);
712	}
713	#ifdef PNG_FREE_ME_SUPPORTED
714	info_ptr->free_me \|= PNG_FREE_TEXT;
715	#endif
716	}
717	png_debug1(3, "allocated %d entries for info_ptr->text",
718	info_ptr->max_text);
719	}
720
721	for (i = 0; i < num_text; i++)
722	{
723	png_size_t text_length, key_len;
724	png_size_t lang_len, lang_key_len;
725	png_textp textp = &(info_ptr->text[info_ptr->num_text]);
726
727	if (text_ptr[i].key == NULL)
728	continue;
729
730	key_len = png_strlen(text_ptr[i].key);
731
732	if (text_ptr[i].compression <= 0)
733	{
734	lang_len = 0;
735	lang_key_len = 0;
736	}
737
738	else
739	#ifdef PNG_iTXt_SUPPORTED
740	{
741	/* Set iTXt data */
742
743	if (text_ptr[i].lang != NULL)
744	lang_len = png_strlen(text_ptr[i].lang);
745	else
746	lang_len = 0;
747	if (text_ptr[i].lang_key != NULL)
748	lang_key_len = png_strlen(text_ptr[i].lang_key);
749	else
750	lang_key_len = 0;
751	}
752	#else /* PNG_iTXt_SUPPORTED */
753	{
754	png_warning(png_ptr, "iTXt chunk not supported.");
755	continue;
756	}
757	#endif
758
759	if (text_ptr[i].text == NULL \|\| text_ptr[i].text[0] == '\0')
760	{
761	text_length = 0;
762	#ifdef PNG_iTXt_SUPPORTED
763	if (text_ptr[i].compression > 0)
764	textp->compression = PNG_ITXT_COMPRESSION_NONE;
765	else
766	#endif
767	textp->compression = PNG_TEXT_COMPRESSION_NONE;
768	}
769
770	else
771	{
772	text_length = png_strlen(text_ptr[i].text);
773	textp->compression = text_ptr[i].compression;
774	}
775
776	textp->key = (png_charp)png_malloc_warn(png_ptr,
777	(png_uint_32)
778	(key_len + text_length + lang_len + lang_key_len + 4));
779	if (textp->key == NULL)
780	return(1);
781	png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
782	(png_uint_32)
783	(key_len + lang_len + lang_key_len + text_length + 4),
784	textp->key);
785
786	png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
787	*(textp->key + key_len) = '\0';
788	#ifdef PNG_iTXt_SUPPORTED
789	if (text_ptr[i].compression > 0)
790	{
791	textp->lang = textp->key + key_len + 1;
792	png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
793	*(textp->lang + lang_len) = '\0';
794	textp->lang_key = textp->lang + lang_len + 1;
795	png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
796	*(textp->lang_key + lang_key_len) = '\0';
797	textp->text = textp->lang_key + lang_key_len + 1;
798	}
799	else
800	#endif
801	{
802	#ifdef PNG_iTXt_SUPPORTED
803	textp->lang=NULL;
804	textp->lang_key=NULL;
805	#endif
806	textp->text = textp->key + key_len + 1;
807	}
808	if (text_length)
809	png_memcpy(textp->text, text_ptr[i].text,
810	(png_size_t)(text_length));
811	*(textp->text + text_length) = '\0';
812
813	#ifdef PNG_iTXt_SUPPORTED
814	if (textp->compression > 0)
815	{
816	textp->text_length = 0;
817	textp->itxt_length = text_length;
818	}
819	else
820	#endif
821
822	{
823	textp->text_length = text_length;
824	#ifdef PNG_iTXt_SUPPORTED
825	textp->itxt_length = 0;
826	#endif
827	}
828	info_ptr->num_text++;
829	png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
830	}
831	return(0);
832	}
833	#endif
834
835	#ifdef PNG_tIME_SUPPORTED
836	void PNGAPI
837	png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
838	{
839	png_debug1(1, "in %s storage function", "tIME");
840
841	if (png_ptr == NULL \|\| info_ptr == NULL \|\|
842	(png_ptr->mode & PNG_WROTE_tIME))
843	return;
844
845	if (mod_time->month == 0 \|\| mod_time->month > 12 \|\|
846	mod_time->day == 0 \|\| mod_time->day > 31 \|\|
847	mod_time->hour > 23 \|\| mod_time->minute > 59 \|\|
848	mod_time->second > 60)
849	{
850	png_warning(png_ptr, "Ignoring invalid time value");
851	return;
852	}
853
854	png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
855	info_ptr->valid \|= PNG_INFO_tIME;
856	}
857	#endif
858
859	#ifdef PNG_tRNS_SUPPORTED
860	void PNGAPI
861	png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
862	png_bytep trans, int num_trans, png_color_16p trans_values)
863	{
864	png_debug1(1, "in %s storage function", "tRNS");
865
866	if (png_ptr == NULL \|\| info_ptr == NULL)
867	return;
868
869	if (num_trans < 0 \|\| num_trans > PNG_MAX_PALETTE_LENGTH)
870	{
871	png_warning(png_ptr, "Ignoring invalid num_trans value");
872	return;
873	}
874
875	if (trans != NULL)
876	{
877	/* It may not actually be necessary to set png_ptr->trans here;
878	* we do it for backward compatibility with the way the png_handle_tRNS
879	* function used to do the allocation.
880	*/
881
882	#ifdef PNG_FREE_ME_SUPPORTED
883	png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
884	#endif
885
886	/* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
887	png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
888	(png_uint_32)PNG_MAX_PALETTE_LENGTH);
889	if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
890	png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
891	}
892
893	if (trans_values != NULL)
894	{
895	int sample_max = (1 << info_ptr->bit_depth);
896	if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
897	(int)trans_values->gray > sample_max) \|\|
898	(info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
899	((int)trans_values->red > sample_max \|\|
900	(int)trans_values->green > sample_max \|\|
901	(int)trans_values->blue > sample_max)))
902	png_warning(png_ptr,
903	"tRNS chunk has out-of-range samples for bit_depth");
904	png_memcpy(&(info_ptr->trans_values), trans_values,
905	png_sizeof(png_color_16));
906	if (num_trans == 0)
907	num_trans = 1;
908	}
909
910	info_ptr->num_trans = (png_uint_16)num_trans;
911	if (num_trans != 0)
912	{
913	info_ptr->valid \|= PNG_INFO_tRNS;
914	#ifdef PNG_FREE_ME_SUPPORTED
915	info_ptr->free_me \|= PNG_FREE_TRNS;
916	#else
917	png_ptr->flags \|= PNG_FLAG_FREE_TRNS;
918	#endif
919	}
920	}
921	#endif
922
923	#ifdef PNG_sPLT_SUPPORTED
924	void PNGAPI
925	png_set_sPLT(png_structp png_ptr,
926	png_infop info_ptr, png_sPLT_tp entries, int nentries)
927	/*
928	* entries - array of png_sPLT_t structures
929	* to be added to the list of palettes
930	* in the info structure.
931	* nentries - number of palette structures to be
932	* added.
933	*/
934	{
935	png_sPLT_tp np;
936	int i;
937
938	if (png_ptr == NULL \|\| info_ptr == NULL)
939	return;
940
941	np = (png_sPLT_tp)png_malloc_warn(png_ptr,
942	(info_ptr->splt_palettes_num + nentries) *
943	(png_uint_32)png_sizeof(png_sPLT_t));
944	if (np == NULL)
945	{
946	png_warning(png_ptr, "No memory for sPLT palettes.");
947	return;
948	}
949
950	png_memcpy(np, info_ptr->splt_palettes,
951	info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
952	png_free(png_ptr, info_ptr->splt_palettes);
953	info_ptr->splt_palettes=NULL;
954
955	for (i = 0; i < nentries; i++)
956	{
957	png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
958	png_sPLT_tp from = entries + i;
959	png_uint_32 length;
960
961	length = png_strlen(from->name) + 1;
962	to->name = (png_charp)png_malloc_warn(png_ptr, length);
963	if (to->name == NULL)
964	{
965	png_warning(png_ptr,
966	"Out of memory while processing sPLT chunk");
967	continue;
968	}
969	png_memcpy(to->name, from->name, length);
970	to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
971	(png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
972	if (to->entries == NULL)
973	{
974	png_warning(png_ptr,
975	"Out of memory while processing sPLT chunk");
976	png_free(png_ptr, to->name);
977	to->name = NULL;
978	continue;
979	}
980	png_memcpy(to->entries, from->entries,
981	from->nentries * png_sizeof(png_sPLT_entry));
982	to->nentries = from->nentries;
983	to->depth = from->depth;
984	}
985
986	info_ptr->splt_palettes = np;
987	info_ptr->splt_palettes_num += nentries;
988	info_ptr->valid \|= PNG_INFO_sPLT;
989	#ifdef PNG_FREE_ME_SUPPORTED
990	info_ptr->free_me \|= PNG_FREE_SPLT;
991	#endif
992	}
993	#endif /* PNG_sPLT_SUPPORTED */
994
995	#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
996	void PNGAPI
997	png_set_unknown_chunks(png_structp png_ptr,
998	png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
999	{
1000	png_unknown_chunkp np;
1001	int i;
1002
1003	if (png_ptr == NULL \|\| info_ptr == NULL \|\| num_unknowns == 0)
1004	return;
1005
1006	np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
1007	(png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
1008	png_sizeof(png_unknown_chunk)));
1009	if (np == NULL)
1010	{
1011	png_warning(png_ptr,
1012	"Out of memory while processing unknown chunk.");
1013	return;
1014	}
1015
1016	png_memcpy(np, info_ptr->unknown_chunks,
1017	info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
1018	png_free(png_ptr, info_ptr->unknown_chunks);
1019	info_ptr->unknown_chunks = NULL;
1020
1021	for (i = 0; i < num_unknowns; i++)
1022	{
1023	png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
1024	png_unknown_chunkp from = unknowns + i;
1025
1026	png_memcpy((png_charp)to->name, (png_charp)from->name,
1027	png_sizeof(from->name));
1028	to->name[png_sizeof(to->name)-1] = '\0';
1029	to->size = from->size;
1030	/* Note our location in the read or write sequence */
1031	to->location = (png_byte)(png_ptr->mode & 0xff);
1032
1033	if (from->size == 0)
1034	to->data=NULL;
1035	else
1036	{
1037	to->data = (png_bytep)png_malloc_warn(png_ptr,
1038	(png_uint_32)from->size);
1039	if (to->data == NULL)
1040	{
1041	png_warning(png_ptr,
1042	"Out of memory while processing unknown chunk.");
1043	to->size = 0;
1044	}
1045	else
1046	png_memcpy(to->data, from->data, from->size);
1047	}
1048	}
1049
1050	info_ptr->unknown_chunks = np;
1051	info_ptr->unknown_chunks_num += num_unknowns;
1052	#ifdef PNG_FREE_ME_SUPPORTED
1053	info_ptr->free_me \|= PNG_FREE_UNKN;
1054	#endif
1055	}
1056	void PNGAPI
1057	png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1058	int chunk, int location)
1059	{
1060	if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1061	(int)info_ptr->unknown_chunks_num)
1062	info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1063	}
1064	#endif
1065
1066	#if defined(PNG_1_0_X) \|\| defined(PNG_1_2_X)
1067	#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) \|\| \
1068	defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
1069	void PNGAPI
1070	png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
1071	{
1072	/* This function is deprecated in favor of png_permit_mng_features()
1073	and will be removed from libpng-1.3.0 */
1074
1075	png_debug(1, "in png_permit_empty_plte, DEPRECATED.");
1076
1077	if (png_ptr == NULL)
1078	return;
1079	png_ptr->mng_features_permitted = (png_byte)
1080	((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) \|
1081	((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
1082	}
1083	#endif
1084	#endif
1085
1086	#ifdef PNG_MNG_FEATURES_SUPPORTED
1087	png_uint_32 PNGAPI
1088	png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1089	{
1090	png_debug(1, "in png_permit_mng_features");
1091
1092	if (png_ptr == NULL)
1093	return (png_uint_32)0;
1094	png_ptr->mng_features_permitted =
1095	(png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1096	return (png_uint_32)png_ptr->mng_features_permitted;
1097	}
1098	#endif
1099
1100	#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1101	void PNGAPI
1102	png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
1103	chunk_list, int num_chunks)
1104	{
1105	png_bytep new_list, p;
1106	int i, old_num_chunks;
1107	if (png_ptr == NULL)
1108	return;
1109	if (num_chunks == 0)
1110	{
1111	if (keep == PNG_HANDLE_CHUNK_ALWAYS \|\| keep == PNG_HANDLE_CHUNK_IF_SAFE)
1112	png_ptr->flags \|= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1113	else
1114	png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1115
1116	if (keep == PNG_HANDLE_CHUNK_ALWAYS)
1117	png_ptr->flags \|= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1118	else
1119	png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1120	return;
1121	}
1122	if (chunk_list == NULL)
1123	return;
1124	old_num_chunks = png_ptr->num_chunk_list;
1125	new_list=(png_bytep)png_malloc(png_ptr,
1126	(png_uint_32)
1127	(5*(num_chunks + old_num_chunks)));
1128	if (png_ptr->chunk_list != NULL)
1129	{
1130	png_memcpy(new_list, png_ptr->chunk_list,
1131	(png_size_t)(5*old_num_chunks));
1132	png_free(png_ptr, png_ptr->chunk_list);
1133	png_ptr->chunk_list=NULL;
1134	}
1135	png_memcpy(new_list + 5*old_num_chunks, chunk_list,
1136	(png_size_t)(5*num_chunks));
1137	for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
1138	*p=(png_byte)keep;
1139	png_ptr->num_chunk_list = old_num_chunks + num_chunks;
1140	png_ptr->chunk_list = new_list;
1141	#ifdef PNG_FREE_ME_SUPPORTED
1142	png_ptr->free_me \|= PNG_FREE_LIST;
1143	#endif
1144	}
1145	#endif
1146
1147	#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1148	void PNGAPI
1149	png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1150	png_user_chunk_ptr read_user_chunk_fn)
1151	{
1152	png_debug(1, "in png_set_read_user_chunk_fn");
1153
1154	if (png_ptr == NULL)
1155	return;
1156
1157	png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1158	png_ptr->user_chunk_ptr = user_chunk_ptr;
1159	}
1160	#endif
1161
1162	#ifdef PNG_INFO_IMAGE_SUPPORTED
1163	void PNGAPI
1164	png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1165	{
1166	png_debug1(1, "in %s storage function", "rows");
1167
1168	if (png_ptr == NULL \|\| info_ptr == NULL)
1169	return;
1170
1171	if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1172	png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1173	info_ptr->row_pointers = row_pointers;
1174	if (row_pointers)
1175	info_ptr->valid \|= PNG_INFO_IDAT;
1176	}
1177	#endif
1178
1179	void PNGAPI
1180	png_set_compression_buffer_size(png_structp png_ptr,
1181	png_uint_32 size)
1182	{
1183	if (png_ptr == NULL)
1184	return;
1185	png_free(png_ptr, png_ptr->zbuf);
1186	png_ptr->zbuf_size = (png_size_t)size;
1187	png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1188	png_ptr->zstream.next_out = png_ptr->zbuf;
1189	png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1190	}
1191
1192	void PNGAPI
1193	png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1194	{
1195	if (png_ptr && info_ptr)
1196	info_ptr->valid &= ~mask;
1197	}
1198
1199
1200	#ifndef PNG_1_0_X
1201	#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1202	/* Function was added to libpng 1.2.0 and should always exist by default */
1203	void PNGAPI
1204	png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
1205	{
1206	/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
1207	if (png_ptr != NULL)
1208	png_ptr->asm_flags = 0;
1209	PNG_UNUSED(asm_flags) /* Quiet the compiler */
1210	}
1211
1212	/* This function was added to libpng 1.2.0 */
1213	void PNGAPI
1214	png_set_mmx_thresholds (png_structp png_ptr,
1215	png_byte mmx_bitdepth_threshold,
1216	png_uint_32 mmx_rowbytes_threshold)
1217	{
1218	/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
1219	if (png_ptr == NULL)
1220	return;
1221	/* Quiet the compiler */
1222	PNG_UNUSED(mmx_bitdepth_threshold)
1223	PNG_UNUSED(mmx_rowbytes_threshold)
1224	}
1225	#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1226
1227	#ifdef PNG_SET_USER_LIMITS_SUPPORTED
1228	/* This function was added to libpng 1.2.6 */
1229	void PNGAPI
1230	png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1231	png_uint_32 user_height_max)
1232	{
1233	/* Images with dimensions larger than these limits will be
1234	* rejected by png_set_IHDR(). To accept any PNG datastream
1235	* regardless of dimensions, set both limits to 0x7ffffffL.
1236	*/
1237	if (png_ptr == NULL)
1238	return;
1239	png_ptr->user_width_max = user_width_max;
1240	png_ptr->user_height_max = user_height_max;
1241	}
1242	#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1243
1244
1245	#ifdef PNG_BENIGN_ERRORS_SUPPORTED
1246	void PNGAPI
1247	png_set_benign_errors(png_structp png_ptr, int allowed)
1248	{
1249	png_debug(1, "in png_set_benign_errors");
1250
1251	if (allowed)
1252	png_ptr->flags \|= PNG_FLAG_BENIGN_ERRORS_WARN;
1253	else
1254	png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
1255	}
1256	#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
1257	#endif /* ?PNG_1_0_X */
1258	#endif /* PNG_READ_SUPPORTED \|\| PNG_WRITE_SUPPORTED */

注意: 瀏覽 TracBrowser 來幫助您使用儲存庫瀏覽器

source: vbox/trunk/src/libs/libpng-1.2.54/pngset.c@ 62180

以其他格式下載: