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pngset.c@ 317

Last change on this file since 317 was 95, checked in by Rick van der Zwet, 15 years ago
Bad boy, improper move of directory
File size: 40.7 KB

Line
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)
22	void PNGAPI
23	png_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
36	void PNGAPI
37	png_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
86	void PNGAPI
87	png_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
154	void PNGAPI
155	png_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
179	void PNGAPI
180	png_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)
217	void PNGAPI
218	png_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
259	void PNGAPI
260	png_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	- 78 / 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	- 78 / 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)
368	void PNGAPI
369	png_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)
384	void PNGAPI
385	png_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
454	void PNGAPI
455	png_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
470	void PNGAPI
471	png_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)
511	void PNGAPI
512	png_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
526	void PNGAPI
527	png_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)
576	void PNGAPI
577	png_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)
590	void PNGAPI
591	png_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
601	void PNGAPI
602	png_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)
673	void PNGAPI
674	png_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)
717	void PNGAPI
718	png_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
727	int /* PRIVATE */
728	png_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)
891	void PNGAPI
892	png_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)
905	void PNGAPI
906	png_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)
948	void PNGAPI
949	png_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)
999	void PNGAPI
1000	png_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	}
1050	void PNGAPI
1051	png_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)
1063	void PNGAPI
1064	png_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)
1079	png_uint_32 PNGAPI
1080	png_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)
1092	void PNGAPI
1093	png_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)
1138	void PNGAPI
1139	png_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)
1151	void PNGAPI
1152	png_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
1168	void PNGAPI
1169	png_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
1182	void PNGAPI
1183	png_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 */
1193	void PNGAPI
1194	png_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 */
1240	void PNGAPI
1241	png_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 */
1256	void PNGAPI
1257	png_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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source: liacs/MIR2010/SourceCode/cximage/png/pngset.c@ 317

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