WebSVN - shark - Blame - Rev 96 - /shark/trunk/ports/png/pngset.c

Rev	Author	Line No.	Line
96	giacomo	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 */

Subversion Repositories shark

(root)/shark/trunk/ports/png/pngset.c - Rev 96