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source: trunk/third/libpng/pngset.c @ 18166

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Revision 18166, 35.6 KB checked in by ghudson, 21 years ago (diff)
This commit was generated by cvs2svn to compensate for changes in r18165, which included commits to RCS files with non-trunk default branches.

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1
2	/* pngset.c - storage of image information into info struct
3	*
4	* libpng 1.2.5 - October 3, 2002
5	* For conditions of distribution and use, see copyright notice in png.h
6	* Copyright (c) 1998-2002 Glenn Randers-Pehrson
7	* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8	* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
9	*
10	* The functions here are used during reads to store data from the file
11	* into the info struct, and during writes to store application data
12	* into the info struct for writing into the file. This abstracts the
13	* info struct and allows us to change the structure in the future.
14	*/
15
16	#define PNG_INTERNAL
17	#include "png.h"
18
19	#if defined(PNG_bKGD_SUPPORTED)
20	void PNGAPI
21	png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
22	{
23	png_debug1(1, "in %s storage function\n", "bKGD");
24	if (png_ptr == NULL \|\| info_ptr == NULL)
25	return;
26
27	png_memcpy(&(info_ptr->background), background, sizeof(png_color_16));
28	info_ptr->valid \|= PNG_INFO_bKGD;
29	}
30	#endif
31
32	#if defined(PNG_cHRM_SUPPORTED)
33	#ifdef PNG_FLOATING_POINT_SUPPORTED
34	void PNGAPI
35	png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
36	double white_x, double white_y, double red_x, double red_y,
37	double green_x, double green_y, double blue_x, double blue_y)
38	{
39	png_debug1(1, "in %s storage function\n", "cHRM");
40	if (png_ptr == NULL \|\| info_ptr == NULL)
41	return;
42
43	if (white_x < 0.0 \|\| white_y < 0.0 \|\|
44	red_x < 0.0 \|\| red_y < 0.0 \|\|
45	green_x < 0.0 \|\| green_y < 0.0 \|\|
46	blue_x < 0.0 \|\| blue_y < 0.0)
47	{
48	png_warning(png_ptr,
49	"Ignoring attempt to set negative chromaticity value");
50	return;
51	}
52	if (white_x > 21474.83 \|\| white_y > 21474.83 \|\|
53	red_x > 21474.83 \|\| red_y > 21474.83 \|\|
54	green_x > 21474.83 \|\| green_y > 21474.83 \|\|
55	blue_x > 21474.83 \|\| blue_y > 21474.83)
56	{
57	png_warning(png_ptr,
58	"Ignoring attempt to set chromaticity value exceeding 21474.83");
59	return;
60	}
61
62	info_ptr->x_white = (float)white_x;
63	info_ptr->y_white = (float)white_y;
64	info_ptr->x_red = (float)red_x;
65	info_ptr->y_red = (float)red_y;
66	info_ptr->x_green = (float)green_x;
67	info_ptr->y_green = (float)green_y;
68	info_ptr->x_blue = (float)blue_x;
69	info_ptr->y_blue = (float)blue_y;
70	#ifdef PNG_FIXED_POINT_SUPPORTED
71	info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
72	info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
73	info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
74	info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
75	info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
76	info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
77	info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
78	info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
79	#endif
80	info_ptr->valid \|= PNG_INFO_cHRM;
81	}
82	#endif
83	#ifdef PNG_FIXED_POINT_SUPPORTED
84	void PNGAPI
85	png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
86	png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
87	png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
88	png_fixed_point blue_x, png_fixed_point blue_y)
89	{
90	png_debug1(1, "in %s storage function\n", "cHRM");
91	if (png_ptr == NULL \|\| info_ptr == NULL)
92	return;
93
94	if (white_x < 0 \|\| white_y < 0 \|\|
95	red_x < 0 \|\| red_y < 0 \|\|
96	green_x < 0 \|\| green_y < 0 \|\|
97	blue_x < 0 \|\| blue_y < 0)
98	{
99	png_warning(png_ptr,
100	"Ignoring attempt to set negative chromaticity value");
101	return;
102	}
103	if (white_x > (double) PNG_MAX_UINT \|\| white_y > (double) PNG_MAX_UINT \|\|
104	red_x > (double) PNG_MAX_UINT \|\| red_y > (double) PNG_MAX_UINT \|\|
105	green_x > (double) PNG_MAX_UINT \|\| green_y > (double) PNG_MAX_UINT \|\|
106	blue_x > (double) PNG_MAX_UINT \|\| blue_y > (double) PNG_MAX_UINT)
107	{
108	png_warning(png_ptr,
109	"Ignoring attempt to set chromaticity value exceeding 21474.83");
110	return;
111	}
112	info_ptr->int_x_white = white_x;
113	info_ptr->int_y_white = white_y;
114	info_ptr->int_x_red = red_x;
115	info_ptr->int_y_red = red_y;
116	info_ptr->int_x_green = green_x;
117	info_ptr->int_y_green = green_y;
118	info_ptr->int_x_blue = blue_x;
119	info_ptr->int_y_blue = blue_y;
120	#ifdef PNG_FLOATING_POINT_SUPPORTED
121	info_ptr->x_white = (float)(white_x/100000.);
122	info_ptr->y_white = (float)(white_y/100000.);
123	info_ptr->x_red = (float)( red_x/100000.);
124	info_ptr->y_red = (float)( red_y/100000.);
125	info_ptr->x_green = (float)(green_x/100000.);
126	info_ptr->y_green = (float)(green_y/100000.);
127	info_ptr->x_blue = (float)( blue_x/100000.);
128	info_ptr->y_blue = (float)( blue_y/100000.);
129	#endif
130	info_ptr->valid \|= PNG_INFO_cHRM;
131	}
132	#endif
133	#endif
134
135	#if defined(PNG_gAMA_SUPPORTED)
136	#ifdef PNG_FLOATING_POINT_SUPPORTED
137	void PNGAPI
138	png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
139	{
140	double gamma;
141	png_debug1(1, "in %s storage function\n", "gAMA");
142	if (png_ptr == NULL \|\| info_ptr == NULL)
143	return;
144
145	/* Check for overflow */
146	if (file_gamma > 21474.83)
147	{
148	png_warning(png_ptr, "Limiting gamma to 21474.83");
149	gamma=21474.83;
150	}
151	else
152	gamma=file_gamma;
153	info_ptr->gamma = (float)gamma;
154	#ifdef PNG_FIXED_POINT_SUPPORTED
155	info_ptr->int_gamma = (int)(gamma*100000.+.5);
156	#endif
157	info_ptr->valid \|= PNG_INFO_gAMA;
158	if(gamma == 0.0)
159	png_warning(png_ptr, "Setting gamma=0");
160	}
161	#endif
162	void PNGAPI
163	png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
164	int_gamma)
165	{
166	png_fixed_point gamma;
167
168	png_debug1(1, "in %s storage function\n", "gAMA");
169	if (png_ptr == NULL \|\| info_ptr == NULL)
170	return;
171
172	if (int_gamma > (png_fixed_point) PNG_MAX_UINT)
173	{
174	png_warning(png_ptr, "Limiting gamma to 21474.83");
175	gamma=PNG_MAX_UINT;
176	}
177	else
178	{
179	if (int_gamma < 0)
180	{
181	png_warning(png_ptr, "Setting negative gamma to zero");
182	gamma=0;
183	}
184	else
185	gamma=int_gamma;
186	}
187	#ifdef PNG_FLOATING_POINT_SUPPORTED
188	info_ptr->gamma = (float)(gamma/100000.);
189	#endif
190	#ifdef PNG_FIXED_POINT_SUPPORTED
191	info_ptr->int_gamma = gamma;
192	#endif
193	info_ptr->valid \|= PNG_INFO_gAMA;
194	if(gamma == 0)
195	png_warning(png_ptr, "Setting gamma=0");
196	}
197	#endif
198
199	#if defined(PNG_hIST_SUPPORTED)
200	void PNGAPI
201	png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
202	{
203	int i;
204
205	png_debug1(1, "in %s storage function\n", "hIST");
206	if (png_ptr == NULL \|\| info_ptr == NULL)
207	return;
208	if (info_ptr->num_palette == 0)
209	{
210	png_warning(png_ptr,
211	"Palette size 0, hIST allocation skipped.");
212	return;
213	}
214
215	#ifdef PNG_FREE_ME_SUPPORTED
216	png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
217	#endif
218	/* Changed from info->num_palette to 256 in version 1.2.1 */
219	png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
220	(png_uint_32)(256 * sizeof (png_uint_16)));
221	if (png_ptr->hist == NULL)
222	{
223	png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
224	return;
225	}
226
227	for (i = 0; i < info_ptr->num_palette; i++)
228	png_ptr->hist[i] = hist[i];
229	info_ptr->hist = png_ptr->hist;
230	info_ptr->valid \|= PNG_INFO_hIST;
231
232	#ifdef PNG_FREE_ME_SUPPORTED
233	info_ptr->free_me \|= PNG_FREE_HIST;
234	#else
235	png_ptr->flags \|= PNG_FLAG_FREE_HIST;
236	#endif
237	}
238	#endif
239
240	void PNGAPI
241	png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
242	png_uint_32 width, png_uint_32 height, int bit_depth,
243	int color_type, int interlace_type, int compression_type,
244	int filter_type)
245	{
246	int rowbytes_per_pixel;
247	png_debug1(1, "in %s storage function\n", "IHDR");
248	if (png_ptr == NULL \|\| info_ptr == NULL)
249	return;
250
251	/* check for width and height valid values */
252	if (width == 0 \|\| height == 0)
253	png_error(png_ptr, "Image width or height is zero in IHDR");
254	if (width > PNG_MAX_UINT \|\| height > PNG_MAX_UINT)
255	png_error(png_ptr, "Invalid image size in IHDR");
256
257	/* check other values */
258	if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
259	bit_depth != 8 && bit_depth != 16)
260	png_error(png_ptr, "Invalid bit depth in IHDR");
261
262	if (color_type < 0 \|\| color_type == 1 \|\|
263	color_type == 5 \|\| color_type > 6)
264	png_error(png_ptr, "Invalid color type in IHDR");
265
266	if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) \|\|
267	((color_type == PNG_COLOR_TYPE_RGB \|\|
268	color_type == PNG_COLOR_TYPE_GRAY_ALPHA \|\|
269	color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
270	png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
271
272	if (interlace_type >= PNG_INTERLACE_LAST)
273	png_error(png_ptr, "Unknown interlace method in IHDR");
274
275	if (compression_type != PNG_COMPRESSION_TYPE_BASE)
276	png_error(png_ptr, "Unknown compression method in IHDR");
277
278	#if defined(PNG_MNG_FEATURES_SUPPORTED)
279	/* Accept filter_method 64 (intrapixel differencing) only if
280	* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
281	* 2. Libpng did not read a PNG signature (this filter_method is only
282	* used in PNG datastreams that are embedded in MNG datastreams) and
283	* 3. The application called png_permit_mng_features with a mask that
284	* included PNG_FLAG_MNG_FILTER_64 and
285	* 4. The filter_method is 64 and
286	* 5. The color_type is RGB or RGBA
287	*/
288	if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
289	png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
290	if(filter_type != PNG_FILTER_TYPE_BASE)
291	{
292	if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
293	(filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
294	((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
295	(color_type == PNG_COLOR_TYPE_RGB \|\|
296	color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
297	png_error(png_ptr, "Unknown filter method in IHDR");
298	if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
299	png_warning(png_ptr, "Invalid filter method in IHDR");
300	}
301	#else
302	if(filter_type != PNG_FILTER_TYPE_BASE)
303	png_error(png_ptr, "Unknown filter method in IHDR");
304	#endif
305
306	info_ptr->width = width;
307	info_ptr->height = height;
308	info_ptr->bit_depth = (png_byte)bit_depth;
309	info_ptr->color_type =(png_byte) color_type;
310	info_ptr->compression_type = (png_byte)compression_type;
311	info_ptr->filter_type = (png_byte)filter_type;
312	info_ptr->interlace_type = (png_byte)interlace_type;
313	if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
314	info_ptr->channels = 1;
315	else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
316	info_ptr->channels = 3;
317	else
318	info_ptr->channels = 1;
319	if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
320	info_ptr->channels++;
321	info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
322
323	/* check for overflow */
324	rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3;
325	if ( width > PNG_MAX_UINT/rowbytes_per_pixel - 64)
326	{
327	png_warning(png_ptr,
328	"Width too large to process image data; rowbytes will overflow.");
329	info_ptr->rowbytes = (png_size_t)0;
330	}
331	else
332	info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3;
333	}
334
335	#if defined(PNG_oFFs_SUPPORTED)
336	void PNGAPI
337	png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
338	png_int_32 offset_x, png_int_32 offset_y, int unit_type)
339	{
340	png_debug1(1, "in %s storage function\n", "oFFs");
341	if (png_ptr == NULL \|\| info_ptr == NULL)
342	return;
343
344	info_ptr->x_offset = offset_x;
345	info_ptr->y_offset = offset_y;
346	info_ptr->offset_unit_type = (png_byte)unit_type;
347	info_ptr->valid \|= PNG_INFO_oFFs;
348	}
349	#endif
350
351	#if defined(PNG_pCAL_SUPPORTED)
352	void PNGAPI
353	png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
354	png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
355	png_charp units, png_charpp params)
356	{
357	png_uint_32 length;
358	int i;
359
360	png_debug1(1, "in %s storage function\n", "pCAL");
361	if (png_ptr == NULL \|\| info_ptr == NULL)
362	return;
363
364	length = png_strlen(purpose) + 1;
365	png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
366	info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
367	if (info_ptr->pcal_purpose == NULL)
368	{
369	png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
370	return;
371	}
372	png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
373
374	png_debug(3, "storing X0, X1, type, and nparams in info\n");
375	info_ptr->pcal_X0 = X0;
376	info_ptr->pcal_X1 = X1;
377	info_ptr->pcal_type = (png_byte)type;
378	info_ptr->pcal_nparams = (png_byte)nparams;
379
380	length = png_strlen(units) + 1;
381	png_debug1(3, "allocating units for info (%lu bytes)\n", length);
382	info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
383	if (info_ptr->pcal_units == NULL)
384	{
385	png_warning(png_ptr, "Insufficient memory for pCAL units.");
386	return;
387	}
388	png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
389
390	info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
391	(png_uint_32)((nparams + 1) * sizeof(png_charp)));
392	if (info_ptr->pcal_params == NULL)
393	{
394	png_warning(png_ptr, "Insufficient memory for pCAL params.");
395	return;
396	}
397
398	info_ptr->pcal_params[nparams] = NULL;
399
400	for (i = 0; i < nparams; i++)
401	{
402	length = png_strlen(params[i]) + 1;
403	png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
404	info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
405	if (info_ptr->pcal_params[i] == NULL)
406	{
407	png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
408	return;
409	}
410	png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
411	}
412
413	info_ptr->valid \|= PNG_INFO_pCAL;
414	#ifdef PNG_FREE_ME_SUPPORTED
415	info_ptr->free_me \|= PNG_FREE_PCAL;
416	#endif
417	}
418	#endif
419
420	#if defined(PNG_READ_sCAL_SUPPORTED) \|\| defined(PNG_WRITE_sCAL_SUPPORTED)
421	#ifdef PNG_FLOATING_POINT_SUPPORTED
422	void PNGAPI
423	png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
424	int unit, double width, double height)
425	{
426	png_debug1(1, "in %s storage function\n", "sCAL");
427	if (png_ptr == NULL \|\| info_ptr == NULL)
428	return;
429
430	info_ptr->scal_unit = (png_byte)unit;
431	info_ptr->scal_pixel_width = width;
432	info_ptr->scal_pixel_height = height;
433
434	info_ptr->valid \|= PNG_INFO_sCAL;
435	}
436	#else
437	#ifdef PNG_FIXED_POINT_SUPPORTED
438	void PNGAPI
439	png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
440	int unit, png_charp swidth, png_charp sheight)
441	{
442	png_uint_32 length;
443
444	png_debug1(1, "in %s storage function\n", "sCAL");
445	if (png_ptr == NULL \|\| info_ptr == NULL)
446	return;
447
448	info_ptr->scal_unit = (png_byte)unit;
449
450	length = png_strlen(swidth) + 1;
451	png_debug1(3, "allocating unit for info (%d bytes)\n", length);
452	info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length);
453	png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
454
455	length = png_strlen(sheight) + 1;
456	png_debug1(3, "allocating unit for info (%d bytes)\n", length);
457	info_ptr->scal_s_height = (png_charp)png_malloc(png_ptr, length);
458	png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
459
460	info_ptr->valid \|= PNG_INFO_sCAL;
461	#ifdef PNG_FREE_ME_SUPPORTED
462	info_ptr->free_me \|= PNG_FREE_SCAL;
463	#endif
464	}
465	#endif
466	#endif
467	#endif
468
469	#if defined(PNG_pHYs_SUPPORTED)
470	void PNGAPI
471	png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
472	png_uint_32 res_x, png_uint_32 res_y, int unit_type)
473	{
474	png_debug1(1, "in %s storage function\n", "pHYs");
475	if (png_ptr == NULL \|\| info_ptr == NULL)
476	return;
477
478	info_ptr->x_pixels_per_unit = res_x;
479	info_ptr->y_pixels_per_unit = res_y;
480	info_ptr->phys_unit_type = (png_byte)unit_type;
481	info_ptr->valid \|= PNG_INFO_pHYs;
482	}
483	#endif
484
485	void PNGAPI
486	png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
487	png_colorp palette, int num_palette)
488	{
489
490	png_debug1(1, "in %s storage function\n", "PLTE");
491	if (png_ptr == NULL \|\| info_ptr == NULL)
492	return;
493
494	/*
495	* It may not actually be necessary to set png_ptr->palette here;
496	* we do it for backward compatibility with the way the png_handle_tRNS
497	* function used to do the allocation.
498	*/
499	#ifdef PNG_FREE_ME_SUPPORTED
500	png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
501	#endif
502	/* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
503	in case of an invalid PNG file that has too-large sample values. */
504	png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)256,
505	sizeof (png_color));
506	if (png_ptr->palette == NULL)
507	png_error(png_ptr, "Unable to malloc palette");
508	png_memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color));
509	info_ptr->palette = png_ptr->palette;
510	info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
511
512	#ifdef PNG_FREE_ME_SUPPORTED
513	info_ptr->free_me \|= PNG_FREE_PLTE;
514	#else
515	png_ptr->flags \|= PNG_FLAG_FREE_PLTE;
516	#endif
517
518	info_ptr->valid \|= PNG_INFO_PLTE;
519	}
520
521	#if defined(PNG_sBIT_SUPPORTED)
522	void PNGAPI
523	png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
524	png_color_8p sig_bit)
525	{
526	png_debug1(1, "in %s storage function\n", "sBIT");
527	if (png_ptr == NULL \|\| info_ptr == NULL)
528	return;
529
530	png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8));
531	info_ptr->valid \|= PNG_INFO_sBIT;
532	}
533	#endif
534
535	#if defined(PNG_sRGB_SUPPORTED)
536	void PNGAPI
537	png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
538	{
539	png_debug1(1, "in %s storage function\n", "sRGB");
540	if (png_ptr == NULL \|\| info_ptr == NULL)
541	return;
542
543	info_ptr->srgb_intent = (png_byte)intent;
544	info_ptr->valid \|= PNG_INFO_sRGB;
545	}
546
547	void PNGAPI
548	png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
549	int intent)
550	{
551	#if defined(PNG_gAMA_SUPPORTED)
552	#ifdef PNG_FLOATING_POINT_SUPPORTED
553	float file_gamma;
554	#endif
555	#ifdef PNG_FIXED_POINT_SUPPORTED
556	png_fixed_point int_file_gamma;
557	#endif
558	#endif
559	#if defined(PNG_cHRM_SUPPORTED)
560	#ifdef PNG_FLOATING_POINT_SUPPORTED
561	float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
562	#endif
563	#ifdef PNG_FIXED_POINT_SUPPORTED
564	png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
565	int_green_y, int_blue_x, int_blue_y;
566	#endif
567	#endif
568	png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
569	if (png_ptr == NULL \|\| info_ptr == NULL)
570	return;
571
572	png_set_sRGB(png_ptr, info_ptr, intent);
573
574	#if defined(PNG_gAMA_SUPPORTED)
575	#ifdef PNG_FLOATING_POINT_SUPPORTED
576	file_gamma = (float).45455;
577	png_set_gAMA(png_ptr, info_ptr, file_gamma);
578	#endif
579	#ifdef PNG_FIXED_POINT_SUPPORTED
580	int_file_gamma = 45455L;
581	png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
582	#endif
583	#endif
584
585	#if defined(PNG_cHRM_SUPPORTED)
586	#ifdef PNG_FIXED_POINT_SUPPORTED
587	int_white_x = 31270L;
588	int_white_y = 32900L;
589	int_red_x = 64000L;
590	int_red_y = 33000L;
591	int_green_x = 30000L;
592	int_green_y = 60000L;
593	int_blue_x = 15000L;
594	int_blue_y = 6000L;
595
596	png_set_cHRM_fixed(png_ptr, info_ptr,
597	int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
598	int_blue_x, int_blue_y);
599	#endif
600	#ifdef PNG_FLOATING_POINT_SUPPORTED
601	white_x = (float).3127;
602	white_y = (float).3290;
603	red_x = (float).64;
604	red_y = (float).33;
605	green_x = (float).30;
606	green_y = (float).60;
607	blue_x = (float).15;
608	blue_y = (float).06;
609
610	png_set_cHRM(png_ptr, info_ptr,
611	white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
612	#endif
613	#endif
614	}
615	#endif
616
617
618	#if defined(PNG_iCCP_SUPPORTED)
619	void PNGAPI
620	png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
621	png_charp name, int compression_type,
622	png_charp profile, png_uint_32 proflen)
623	{
624	png_charp new_iccp_name;
625	png_charp new_iccp_profile;
626
627	png_debug1(1, "in %s storage function\n", "iCCP");
628	if (png_ptr == NULL \|\| info_ptr == NULL \|\| name == NULL \|\| profile == NULL)
629	return;
630
631	new_iccp_name = (png_charp)png_malloc(png_ptr, png_strlen(name)+1);
632	png_strcpy(new_iccp_name, name);
633	new_iccp_profile = (png_charp)png_malloc(png_ptr, proflen);
634	png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
635
636	png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
637
638	info_ptr->iccp_proflen = proflen;
639	info_ptr->iccp_name = new_iccp_name;
640	info_ptr->iccp_profile = new_iccp_profile;
641	/* Compression is always zero but is here so the API and info structure
642	* does not have to change if we introduce multiple compression types */
643	info_ptr->iccp_compression = (png_byte)compression_type;
644	#ifdef PNG_FREE_ME_SUPPORTED
645	info_ptr->free_me \|= PNG_FREE_ICCP;
646	#endif
647	info_ptr->valid \|= PNG_INFO_iCCP;
648	}
649	#endif
650
651	#if defined(PNG_TEXT_SUPPORTED)
652	void PNGAPI
653	png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
654	int num_text)
655	{
656	int ret;
657	ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
658	if (ret)
659	png_error(png_ptr, "Insufficient memory to store text");
660	}
661
662	int /* PRIVATE */
663	png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
664	int num_text)
665	{
666	int i;
667
668	png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
669	"text" : (png_const_charp)png_ptr->chunk_name));
670
671	if (png_ptr == NULL \|\| info_ptr == NULL \|\| num_text == 0)
672	return(0);
673
674	/* Make sure we have enough space in the "text" array in info_struct
675	* to hold all of the incoming text_ptr objects.
676	*/
677	if (info_ptr->num_text + num_text > info_ptr->max_text)
678	{
679	if (info_ptr->text != NULL)
680	{
681	png_textp old_text;
682	int old_max;
683
684	old_max = info_ptr->max_text;
685	info_ptr->max_text = info_ptr->num_text + num_text + 8;
686	old_text = info_ptr->text;
687	info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
688	(png_uint_32)(info_ptr->max_text * sizeof (png_text)));
689	if (info_ptr->text == NULL)
690	{
691	png_free(png_ptr, old_text);
692	return(1);
693	}
694	png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
695	sizeof(png_text)));
696	png_free(png_ptr, old_text);
697	}
698	else
699	{
700	info_ptr->max_text = num_text + 8;
701	info_ptr->num_text = 0;
702	info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
703	(png_uint_32)(info_ptr->max_text * sizeof (png_text)));
704	if (info_ptr->text == NULL)
705	return(1);
706	#ifdef PNG_FREE_ME_SUPPORTED
707	info_ptr->free_me \|= PNG_FREE_TEXT;
708	#endif
709	}
710	png_debug1(3, "allocated %d entries for info_ptr->text\n",
711	info_ptr->max_text);
712	}
713	for (i = 0; i < num_text; i++)
714	{
715	png_size_t text_length,key_len;
716	png_size_t lang_len,lang_key_len;
717	png_textp textp = &(info_ptr->text[info_ptr->num_text]);
718
719	if (text_ptr[i].key == NULL)
720	continue;
721
722	key_len = png_strlen(text_ptr[i].key);
723
724	if(text_ptr[i].compression <= 0)
725	{
726	lang_len = 0;
727	lang_key_len = 0;
728	}
729	else
730	#ifdef PNG_iTXt_SUPPORTED
731	{
732	/* set iTXt data */
733	if (text_ptr[i].lang != NULL)
734	lang_len = png_strlen(text_ptr[i].lang);
735	else
736	lang_len = 0;
737	if (text_ptr[i].lang_key != NULL)
738	lang_key_len = png_strlen(text_ptr[i].lang_key);
739	else
740	lang_key_len = 0;
741	}
742	#else
743	{
744	png_warning(png_ptr, "iTXt chunk not supported.");
745	continue;
746	}
747	#endif
748
749	if (text_ptr[i].text == NULL \|\| text_ptr[i].text[0] == '\0')
750	{
751	text_length = 0;
752	#ifdef PNG_iTXt_SUPPORTED
753	if(text_ptr[i].compression > 0)
754	textp->compression = PNG_ITXT_COMPRESSION_NONE;
755	else
756	#endif
757	textp->compression = PNG_TEXT_COMPRESSION_NONE;
758	}
759	else
760	{
761	text_length = png_strlen(text_ptr[i].text);
762	textp->compression = text_ptr[i].compression;
763	}
764
765	textp->key = (png_charp)png_malloc_warn(png_ptr,
766	(png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
767	if (textp->key == NULL)
768	return(1);
769	png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
770	(png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
771	(int)textp->key);
772
773	png_memcpy(textp->key, text_ptr[i].key,
774	(png_size_t)(key_len));
775	*(textp->key+key_len) = '\0';
776	#ifdef PNG_iTXt_SUPPORTED
777	if (text_ptr[i].compression > 0)
778	{
779	textp->lang=textp->key + key_len + 1;
780	png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
781	*(textp->lang+lang_len) = '\0';
782	textp->lang_key=textp->lang + lang_len + 1;
783	png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
784	*(textp->lang_key+lang_key_len) = '\0';
785	textp->text=textp->lang_key + lang_key_len + 1;
786	}
787	else
788	#endif
789	{
790	#ifdef PNG_iTXt_SUPPORTED
791	textp->lang=NULL;
792	textp->lang_key=NULL;
793	#endif
794	textp->text=textp->key + key_len + 1;
795	}
796	if(text_length)
797	png_memcpy(textp->text, text_ptr[i].text,
798	(png_size_t)(text_length));
799	*(textp->text+text_length) = '\0';
800
801	#ifdef PNG_iTXt_SUPPORTED
802	if(textp->compression > 0)
803	{
804	textp->text_length = 0;
805	textp->itxt_length = text_length;
806	}
807	else
808	#endif
809	{
810	textp->text_length = text_length;
811	#ifdef PNG_iTXt_SUPPORTED
812	textp->itxt_length = 0;
813	#endif
814	}
815	info_ptr->text[info_ptr->num_text]= *textp;
816	info_ptr->num_text++;
817	png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
818	}
819	return(0);
820	}
821	#endif
822
823	#if defined(PNG_tIME_SUPPORTED)
824	void PNGAPI
825	png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
826	{
827	png_debug1(1, "in %s storage function\n", "tIME");
828	if (png_ptr == NULL \|\| info_ptr == NULL \|\|
829	(png_ptr->mode & PNG_WROTE_tIME))
830	return;
831
832	png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time));
833	info_ptr->valid \|= PNG_INFO_tIME;
834	}
835	#endif
836
837	#if defined(PNG_tRNS_SUPPORTED)
838	void PNGAPI
839	png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
840	png_bytep trans, int num_trans, png_color_16p trans_values)
841	{
842	png_debug1(1, "in %s storage function\n", "tRNS");
843	if (png_ptr == NULL \|\| info_ptr == NULL)
844	return;
845
846	if (trans != NULL)
847	{
848	/*
849	* It may not actually be necessary to set png_ptr->trans here;
850	* we do it for backward compatibility with the way the png_handle_tRNS
851	* function used to do the allocation.
852	*/
853	#ifdef PNG_FREE_ME_SUPPORTED
854	png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
855	#endif
856	/* Changed from num_trans to 256 in version 1.2.1 */
857	png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
858	(png_uint_32)256);
859	png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
860	#ifdef PNG_FREE_ME_SUPPORTED
861	info_ptr->free_me \|= PNG_FREE_TRNS;
862	#else
863	png_ptr->flags \|= PNG_FLAG_FREE_TRNS;
864	#endif
865	}
866
867	if (trans_values != NULL)
868	{
869	png_memcpy(&(info_ptr->trans_values), trans_values,
870	sizeof(png_color_16));
871	if (num_trans == 0)
872	num_trans = 1;
873	}
874	info_ptr->num_trans = (png_uint_16)num_trans;
875	info_ptr->valid \|= PNG_INFO_tRNS;
876	}
877	#endif
878
879	#if defined(PNG_sPLT_SUPPORTED)
880	void PNGAPI
881	png_set_sPLT(png_structp png_ptr,
882	png_infop info_ptr, png_sPLT_tp entries, int nentries)
883	{
884	png_sPLT_tp np;
885	int i;
886
887	np = (png_sPLT_tp)png_malloc_warn(png_ptr,
888	(info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t));
889	if (np == NULL)
890	{
891	png_warning(png_ptr, "No memory for sPLT palettes.");
892	return;
893	}
894
895	png_memcpy(np, info_ptr->splt_palettes,
896	info_ptr->splt_palettes_num * sizeof(png_sPLT_t));
897	png_free(png_ptr, info_ptr->splt_palettes);
898	info_ptr->splt_palettes=NULL;
899
900	for (i = 0; i < nentries; i++)
901	{
902	png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
903	png_sPLT_tp from = entries + i;
904
905	to->name = (png_charp)png_malloc(png_ptr,
906	png_strlen(from->name) + 1);
907	png_strcpy(to->name, from->name);
908	to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
909	from->nentries * sizeof(png_sPLT_t));
910	png_memcpy(to->entries, from->entries,
911	from->nentries * sizeof(png_sPLT_t));
912	to->nentries = from->nentries;
913	to->depth = from->depth;
914	}
915
916	info_ptr->splt_palettes = np;
917	info_ptr->splt_palettes_num += nentries;
918	info_ptr->valid \|= PNG_INFO_sPLT;
919	#ifdef PNG_FREE_ME_SUPPORTED
920	info_ptr->free_me \|= PNG_FREE_SPLT;
921	#endif
922	}
923	#endif /* PNG_sPLT_SUPPORTED */
924
925	#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
926	void PNGAPI
927	png_set_unknown_chunks(png_structp png_ptr,
928	png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
929	{
930	png_unknown_chunkp np;
931	int i;
932
933	if (png_ptr == NULL \|\| info_ptr == NULL \|\| num_unknowns == 0)
934	return;
935
936	np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
937	(info_ptr->unknown_chunks_num + num_unknowns) *
938	sizeof(png_unknown_chunk));
939	if (np == NULL)
940	{
941	png_warning(png_ptr, "Out of memory while processing unknown chunk.");
942	return;
943	}
944
945	png_memcpy(np, info_ptr->unknown_chunks,
946	info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk));
947	png_free(png_ptr, info_ptr->unknown_chunks);
948	info_ptr->unknown_chunks=NULL;
949
950	for (i = 0; i < num_unknowns; i++)
951	{
952	png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
953	png_unknown_chunkp from = unknowns + i;
954
955	png_strcpy((png_charp)to->name, (png_charp)from->name);
956	to->data = (png_bytep)png_malloc(png_ptr, from->size);
957	if (to->data == NULL)
958	png_warning(png_ptr, "Out of memory while processing unknown chunk.");
959	else
960	{
961	png_memcpy(to->data, from->data, from->size);
962	to->size = from->size;
963
964	/* note our location in the read or write sequence */
965	to->location = (png_byte)(png_ptr->mode & 0xff);
966	}
967	}
968
969	info_ptr->unknown_chunks = np;
970	info_ptr->unknown_chunks_num += num_unknowns;
971	#ifdef PNG_FREE_ME_SUPPORTED
972	info_ptr->free_me \|= PNG_FREE_UNKN;
973	#endif
974	}
975	void PNGAPI
976	png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
977	int chunk, int location)
978	{
979	if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
980	(int)info_ptr->unknown_chunks_num)
981	info_ptr->unknown_chunks[chunk].location = (png_byte)location;
982	}
983	#endif
984
985	#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) \|\| \
986	defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
987	void PNGAPI
988	png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
989	{
990	/* This function is deprecated in favor of png_permit_mng_features()
991	and will be removed from libpng-2.0.0 */
992	png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
993	if (png_ptr == NULL)
994	return;
995	png_ptr->mng_features_permitted = (png_byte)
996	((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) \|
997	((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
998	}
999	#endif
1000
1001	#if defined(PNG_MNG_FEATURES_SUPPORTED)
1002	png_uint_32 PNGAPI
1003	png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1004	{
1005	png_debug(1, "in png_permit_mng_features\n");
1006	if (png_ptr == NULL)
1007	return (png_uint_32)0;
1008	png_ptr->mng_features_permitted =
1009	(png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1010	return (png_uint_32)png_ptr->mng_features_permitted;
1011	}
1012	#endif
1013
1014	#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1015	void PNGAPI
1016	png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
1017	chunk_list, int num_chunks)
1018	{
1019	png_bytep new_list, p;
1020	int i, old_num_chunks;
1021	if (num_chunks == 0)
1022	{
1023	if(keep == HANDLE_CHUNK_ALWAYS \|\| keep == HANDLE_CHUNK_IF_SAFE)
1024	png_ptr->flags \|= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1025	else
1026	png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1027
1028	if(keep == HANDLE_CHUNK_ALWAYS)
1029	png_ptr->flags \|= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1030	else
1031	png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1032	return;
1033	}
1034	if (chunk_list == NULL)
1035	return;
1036	old_num_chunks=png_ptr->num_chunk_list;
1037	new_list=(png_bytep)png_malloc(png_ptr,
1038	(png_uint_32)(5*(num_chunks+old_num_chunks)));
1039	if(png_ptr->chunk_list != NULL)
1040	{
1041	png_memcpy(new_list, png_ptr->chunk_list,
1042	(png_size_t)(5*old_num_chunks));
1043	png_free(png_ptr, png_ptr->chunk_list);
1044	png_ptr->chunk_list=NULL;
1045	}
1046	png_memcpy(new_list+5*old_num_chunks, chunk_list,
1047	(png_size_t)(5*num_chunks));
1048	for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
1049	*p=(png_byte)keep;
1050	png_ptr->num_chunk_list=old_num_chunks+num_chunks;
1051	png_ptr->chunk_list=new_list;
1052	#ifdef PNG_FREE_ME_SUPPORTED
1053	png_ptr->free_me \|= PNG_FREE_LIST;
1054	#endif
1055	}
1056	#endif
1057
1058	#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
1059	void PNGAPI
1060	png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1061	png_user_chunk_ptr read_user_chunk_fn)
1062	{
1063	png_debug(1, "in png_set_read_user_chunk_fn\n");
1064	png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1065	png_ptr->user_chunk_ptr = user_chunk_ptr;
1066	}
1067	#endif
1068
1069	#if defined(PNG_INFO_IMAGE_SUPPORTED)
1070	void PNGAPI
1071	png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1072	{
1073	png_debug1(1, "in %s storage function\n", "rows");
1074
1075	if (png_ptr == NULL \|\| info_ptr == NULL)
1076	return;
1077
1078	if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1079	png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1080	info_ptr->row_pointers = row_pointers;
1081	if(row_pointers)
1082	info_ptr->valid \|= PNG_INFO_IDAT;
1083	}
1084	#endif
1085
1086	void PNGAPI
1087	png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
1088	{
1089	if(png_ptr->zbuf)
1090	png_free(png_ptr, png_ptr->zbuf);
1091	png_ptr->zbuf_size = (png_size_t)size;
1092	png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1093	png_ptr->zstream.next_out = png_ptr->zbuf;
1094	png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1095	}
1096
1097	void PNGAPI
1098	png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1099	{
1100	if (png_ptr && info_ptr)
1101	info_ptr->valid &= ~(mask);
1102	}
1103
1104
1105	#ifndef PNG_1_0_X
1106	#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1107	/* this function was added to libpng 1.2.0 and should always exist by default */
1108	void PNGAPI
1109	png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
1110	{
1111	png_uint_32 settable_asm_flags;
1112	png_uint_32 settable_mmx_flags;
1113
1114	settable_mmx_flags =
1115	#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
1116	PNG_ASM_FLAG_MMX_READ_COMBINE_ROW \|
1117	#endif
1118	#ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
1119	PNG_ASM_FLAG_MMX_READ_INTERLACE \|
1120	#endif
1121	#ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1122	PNG_ASM_FLAG_MMX_READ_FILTER_SUB \|
1123	PNG_ASM_FLAG_MMX_READ_FILTER_UP \|
1124	PNG_ASM_FLAG_MMX_READ_FILTER_AVG \|
1125	PNG_ASM_FLAG_MMX_READ_FILTER_PAETH \|
1126	#endif
1127	0;
1128
1129	/* could be some non-MMX ones in the future, but not currently: */
1130	settable_asm_flags = settable_mmx_flags;
1131
1132	if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) \|\|
1133	!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU))
1134	{
1135	/* clear all MMX flags if MMX isn't supported */
1136	settable_asm_flags &= ~settable_mmx_flags;
1137	png_ptr->asm_flags &= ~settable_mmx_flags;
1138	}
1139
1140	/* we're replacing the settable bits with those passed in by the user,
1141	* so first zero them out of the master copy, then logical-OR in the
1142	* allowed subset that was requested */
1143
1144	png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */
1145	png_ptr->asm_flags \|= (asm_flags & settable_asm_flags); /* set them */
1146	}
1147	#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1148
1149	#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1150	/* this function was added to libpng 1.2.0 */
1151	void PNGAPI
1152	png_set_mmx_thresholds (png_structp png_ptr,
1153	png_byte mmx_bitdepth_threshold,
1154	png_uint_32 mmx_rowbytes_threshold)
1155	{
1156	png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
1157	png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
1158	}
1159	#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1160	#endif /* ?PNG_1_0_X */

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