/thirdparty/libpng/pngset.c
C | 1219 lines | 1034 code | 122 blank | 63 comment | 268 complexity | d085639e21c2f196d18089e8f379dc96 MD5 | raw file
1 2/* pngset.c - storage of image information into info struct 3 * 4 * libpng 1.2.7 - September 12, 2004 5 * For conditions of distribution and use, see copyright notice in png.h 6 * Copyright (c) 1998-2004 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) 20void PNGAPI 21png_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, png_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 34void PNGAPI 35png_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 84void PNGAPI 85png_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_UINT_31_MAX || 104 white_y > (double) PNG_UINT_31_MAX || 105 red_x > (double) PNG_UINT_31_MAX || 106 red_y > (double) PNG_UINT_31_MAX || 107 green_x > (double) PNG_UINT_31_MAX || 108 green_y > (double) PNG_UINT_31_MAX || 109 blue_x > (double) PNG_UINT_31_MAX || 110 blue_y > (double) PNG_UINT_31_MAX) 111 { 112 png_warning(png_ptr, 113 "Ignoring attempt to set chromaticity value exceeding 21474.83"); 114 return; 115 } 116 info_ptr->int_x_white = white_x; 117 info_ptr->int_y_white = white_y; 118 info_ptr->int_x_red = red_x; 119 info_ptr->int_y_red = red_y; 120 info_ptr->int_x_green = green_x; 121 info_ptr->int_y_green = green_y; 122 info_ptr->int_x_blue = blue_x; 123 info_ptr->int_y_blue = blue_y; 124#ifdef PNG_FLOATING_POINT_SUPPORTED 125 info_ptr->x_white = (float)(white_x/100000.); 126 info_ptr->y_white = (float)(white_y/100000.); 127 info_ptr->x_red = (float)( red_x/100000.); 128 info_ptr->y_red = (float)( red_y/100000.); 129 info_ptr->x_green = (float)(green_x/100000.); 130 info_ptr->y_green = (float)(green_y/100000.); 131 info_ptr->x_blue = (float)( blue_x/100000.); 132 info_ptr->y_blue = (float)( blue_y/100000.); 133#endif 134 info_ptr->valid |= PNG_INFO_cHRM; 135} 136#endif 137#endif 138 139#if defined(PNG_gAMA_SUPPORTED) 140#ifdef PNG_FLOATING_POINT_SUPPORTED 141void PNGAPI 142png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) 143{ 144 double gamma; 145 png_debug1(1, "in %s storage function\n", "gAMA"); 146 if (png_ptr == NULL || info_ptr == NULL) 147 return; 148 149 /* Check for overflow */ 150 if (file_gamma > 21474.83) 151 { 152 png_warning(png_ptr, "Limiting gamma to 21474.83"); 153 gamma=21474.83; 154 } 155 else 156 gamma=file_gamma; 157 info_ptr->gamma = (float)gamma; 158#ifdef PNG_FIXED_POINT_SUPPORTED 159 info_ptr->int_gamma = (int)(gamma*100000.+.5); 160#endif 161 info_ptr->valid |= PNG_INFO_gAMA; 162 if(gamma == 0.0) 163 png_warning(png_ptr, "Setting gamma=0"); 164} 165#endif 166void PNGAPI 167png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point 168 int_gamma) 169{ 170 png_fixed_point gamma; 171 172 png_debug1(1, "in %s storage function\n", "gAMA"); 173 if (png_ptr == NULL || info_ptr == NULL) 174 return; 175 176 if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX) 177 { 178 png_warning(png_ptr, "Limiting gamma to 21474.83"); 179 gamma=PNG_UINT_31_MAX; 180 } 181 else 182 { 183 if (int_gamma < 0) 184 { 185 png_warning(png_ptr, "Setting negative gamma to zero"); 186 gamma=0; 187 } 188 else 189 gamma=int_gamma; 190 } 191#ifdef PNG_FLOATING_POINT_SUPPORTED 192 info_ptr->gamma = (float)(gamma/100000.); 193#endif 194#ifdef PNG_FIXED_POINT_SUPPORTED 195 info_ptr->int_gamma = gamma; 196#endif 197 info_ptr->valid |= PNG_INFO_gAMA; 198 if(gamma == 0) 199 png_warning(png_ptr, "Setting gamma=0"); 200} 201#endif 202 203#if defined(PNG_hIST_SUPPORTED) 204void PNGAPI 205png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) 206{ 207 int i; 208 209 png_debug1(1, "in %s storage function\n", "hIST"); 210 if (png_ptr == NULL || info_ptr == NULL) 211 return; 212 if (info_ptr->num_palette == 0) 213 { 214 png_warning(png_ptr, 215 "Palette size 0, hIST allocation skipped."); 216 return; 217 } 218 219#ifdef PNG_FREE_ME_SUPPORTED 220 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); 221#endif 222 /* Changed from info->num_palette to 256 in version 1.2.1 */ 223 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, 224 (png_uint_32)(256 * png_sizeof (png_uint_16))); 225 if (png_ptr->hist == NULL) 226 { 227 png_warning(png_ptr, "Insufficient memory for hIST chunk data."); 228 return; 229 } 230 231 for (i = 0; i < info_ptr->num_palette; i++) 232 png_ptr->hist[i] = hist[i]; 233 info_ptr->hist = png_ptr->hist; 234 info_ptr->valid |= PNG_INFO_hIST; 235 236#ifdef PNG_FREE_ME_SUPPORTED 237 info_ptr->free_me |= PNG_FREE_HIST; 238#else 239 png_ptr->flags |= PNG_FLAG_FREE_HIST; 240#endif 241} 242#endif 243 244void PNGAPI 245png_set_IHDR(png_structp png_ptr, png_infop info_ptr, 246 png_uint_32 width, png_uint_32 height, int bit_depth, 247 int color_type, int interlace_type, int compression_type, 248 int filter_type) 249{ 250 png_debug1(1, "in %s storage function\n", "IHDR"); 251 if (png_ptr == NULL || info_ptr == NULL) 252 return; 253 254 /* check for width and height valid values */ 255 if (width == 0 || height == 0) 256 png_error(png_ptr, "Image width or height is zero in IHDR"); 257#ifdef PNG_SET_USER_LIMITS_SUPPORTED 258 if (width > png_ptr->user_width_max || height > png_ptr->user_height_max) 259 png_error(png_ptr, "image size exceeds user limits in IHDR"); 260#else 261 if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX) 262 png_error(png_ptr, "image size exceeds user limits in IHDR"); 263#endif 264 if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX) 265 png_error(png_ptr, "Invalid image size in IHDR"); 266 if ( width > (PNG_UINT_32_MAX 267 >> 3) /* 8-byte RGBA pixels */ 268 - 64 /* bigrowbuf hack */ 269 - 1 /* filter byte */ 270 - 7*8 /* rounding of width to multiple of 8 pixels */ 271 - 8) /* extra max_pixel_depth pad */ 272 png_warning(png_ptr, "Width is too large for libpng to process pixels"); 273 274 /* check other values */ 275 if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && 276 bit_depth != 8 && bit_depth != 16) 277 png_error(png_ptr, "Invalid bit depth in IHDR"); 278 279 if (color_type < 0 || color_type == 1 || 280 color_type == 5 || color_type > 6) 281 png_error(png_ptr, "Invalid color type in IHDR"); 282 283 if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || 284 ((color_type == PNG_COLOR_TYPE_RGB || 285 color_type == PNG_COLOR_TYPE_GRAY_ALPHA || 286 color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) 287 png_error(png_ptr, "Invalid color type/bit depth combination in IHDR"); 288 289 if (interlace_type >= PNG_INTERLACE_LAST) 290 png_error(png_ptr, "Unknown interlace method in IHDR"); 291 292 if (compression_type != PNG_COMPRESSION_TYPE_BASE) 293 png_error(png_ptr, "Unknown compression method in IHDR"); 294 295#if defined(PNG_MNG_FEATURES_SUPPORTED) 296 /* Accept filter_method 64 (intrapixel differencing) only if 297 * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and 298 * 2. Libpng did not read a PNG signature (this filter_method is only 299 * used in PNG datastreams that are embedded in MNG datastreams) and 300 * 3. The application called png_permit_mng_features with a mask that 301 * included PNG_FLAG_MNG_FILTER_64 and 302 * 4. The filter_method is 64 and 303 * 5. The color_type is RGB or RGBA 304 */ 305 if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted) 306 png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n"); 307 if(filter_type != PNG_FILTER_TYPE_BASE) 308 { 309 if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && 310 (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && 311 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && 312 (color_type == PNG_COLOR_TYPE_RGB || 313 color_type == PNG_COLOR_TYPE_RGB_ALPHA))) 314 png_error(png_ptr, "Unknown filter method in IHDR"); 315 if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) 316 png_warning(png_ptr, "Invalid filter method in IHDR"); 317 } 318#else 319 if(filter_type != PNG_FILTER_TYPE_BASE) 320 png_error(png_ptr, "Unknown filter method in IHDR"); 321#endif 322 323 info_ptr->width = width; 324 info_ptr->height = height; 325 info_ptr->bit_depth = (png_byte)bit_depth; 326 info_ptr->color_type =(png_byte) color_type; 327 info_ptr->compression_type = (png_byte)compression_type; 328 info_ptr->filter_type = (png_byte)filter_type; 329 info_ptr->interlace_type = (png_byte)interlace_type; 330 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) 331 info_ptr->channels = 1; 332 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) 333 info_ptr->channels = 3; 334 else 335 info_ptr->channels = 1; 336 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) 337 info_ptr->channels++; 338 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); 339 340 /* check for potential overflow */ 341 if ( width > (PNG_UINT_32_MAX 342 >> 3) /* 8-byte RGBA pixels */ 343 - 64 /* bigrowbuf hack */ 344 - 1 /* filter byte */ 345 - 7*8 /* rounding of width to multiple of 8 pixels */ 346 - 8) /* extra max_pixel_depth pad */ 347 info_ptr->rowbytes = (png_size_t)0; 348 else 349 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width); 350} 351 352#if defined(PNG_oFFs_SUPPORTED) 353void PNGAPI 354png_set_oFFs(png_structp png_ptr, png_infop info_ptr, 355 png_int_32 offset_x, png_int_32 offset_y, int unit_type) 356{ 357 png_debug1(1, "in %s storage function\n", "oFFs"); 358 if (png_ptr == NULL || info_ptr == NULL) 359 return; 360 361 info_ptr->x_offset = offset_x; 362 info_ptr->y_offset = offset_y; 363 info_ptr->offset_unit_type = (png_byte)unit_type; 364 info_ptr->valid |= PNG_INFO_oFFs; 365} 366#endif 367 368#if defined(PNG_pCAL_SUPPORTED) 369void PNGAPI 370png_set_pCAL(png_structp png_ptr, png_infop info_ptr, 371 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, 372 png_charp units, png_charpp params) 373{ 374 png_uint_32 length; 375 int i; 376 377 png_debug1(1, "in %s storage function\n", "pCAL"); 378 if (png_ptr == NULL || info_ptr == NULL) 379 return; 380 381 length = png_strlen(purpose) + 1; 382 png_debug1(3, "allocating purpose for info (%lu bytes)\n", length); 383 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); 384 if (info_ptr->pcal_purpose == NULL) 385 { 386 png_warning(png_ptr, "Insufficient memory for pCAL purpose."); 387 return; 388 } 389 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); 390 391 png_debug(3, "storing X0, X1, type, and nparams in info\n"); 392 info_ptr->pcal_X0 = X0; 393 info_ptr->pcal_X1 = X1; 394 info_ptr->pcal_type = (png_byte)type; 395 info_ptr->pcal_nparams = (png_byte)nparams; 396 397 length = png_strlen(units) + 1; 398 png_debug1(3, "allocating units for info (%lu bytes)\n", length); 399 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); 400 if (info_ptr->pcal_units == NULL) 401 { 402 png_warning(png_ptr, "Insufficient memory for pCAL units."); 403 return; 404 } 405 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); 406 407 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, 408 (png_uint_32)((nparams + 1) * png_sizeof(png_charp))); 409 if (info_ptr->pcal_params == NULL) 410 { 411 png_warning(png_ptr, "Insufficient memory for pCAL params."); 412 return; 413 } 414 415 info_ptr->pcal_params[nparams] = NULL; 416 417 for (i = 0; i < nparams; i++) 418 { 419 length = png_strlen(params[i]) + 1; 420 png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length); 421 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); 422 if (info_ptr->pcal_params[i] == NULL) 423 { 424 png_warning(png_ptr, "Insufficient memory for pCAL parameter."); 425 return; 426 } 427 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); 428 } 429 430 info_ptr->valid |= PNG_INFO_pCAL; 431#ifdef PNG_FREE_ME_SUPPORTED 432 info_ptr->free_me |= PNG_FREE_PCAL; 433#endif 434} 435#endif 436 437#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) 438#ifdef PNG_FLOATING_POINT_SUPPORTED 439void PNGAPI 440png_set_sCAL(png_structp png_ptr, png_infop info_ptr, 441 int unit, double width, double height) 442{ 443 png_debug1(1, "in %s storage function\n", "sCAL"); 444 if (png_ptr == NULL || info_ptr == NULL) 445 return; 446 447 info_ptr->scal_unit = (png_byte)unit; 448 info_ptr->scal_pixel_width = width; 449 info_ptr->scal_pixel_height = height; 450 451 info_ptr->valid |= PNG_INFO_sCAL; 452} 453#else 454#ifdef PNG_FIXED_POINT_SUPPORTED 455void PNGAPI 456png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, 457 int unit, png_charp swidth, png_charp sheight) 458{ 459 png_uint_32 length; 460 461 png_debug1(1, "in %s storage function\n", "sCAL"); 462 if (png_ptr == NULL || info_ptr == NULL) 463 return; 464 465 info_ptr->scal_unit = (png_byte)unit; 466 467 length = png_strlen(swidth) + 1; 468 png_debug1(3, "allocating unit for info (%d bytes)\n", length); 469 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length); 470 if (info_ptr->scal_s_width == NULL) 471 { 472 png_warning(png_ptr, "Memory allocation failed while processing sCAL."); 473 } 474 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length); 475 476 length = png_strlen(sheight) + 1; 477 png_debug1(3, "allocating unit for info (%d bytes)\n", length); 478 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length); 479 if (info_ptr->scal_s_height == NULL) 480 { 481 png_free (png_ptr, info_ptr->scal_s_width); 482 png_warning(png_ptr, "Memory allocation failed while processing sCAL."); 483 } 484 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length); 485 486 info_ptr->valid |= PNG_INFO_sCAL; 487#ifdef PNG_FREE_ME_SUPPORTED 488 info_ptr->free_me |= PNG_FREE_SCAL; 489#endif 490} 491#endif 492#endif 493#endif 494 495#if defined(PNG_pHYs_SUPPORTED) 496void PNGAPI 497png_set_pHYs(png_structp png_ptr, png_infop info_ptr, 498 png_uint_32 res_x, png_uint_32 res_y, int unit_type) 499{ 500 png_debug1(1, "in %s storage function\n", "pHYs"); 501 if (png_ptr == NULL || info_ptr == NULL) 502 return; 503 504 info_ptr->x_pixels_per_unit = res_x; 505 info_ptr->y_pixels_per_unit = res_y; 506 info_ptr->phys_unit_type = (png_byte)unit_type; 507 info_ptr->valid |= PNG_INFO_pHYs; 508} 509#endif 510 511void PNGAPI 512png_set_PLTE(png_structp png_ptr, png_infop info_ptr, 513 png_colorp palette, int num_palette) 514{ 515 516 png_debug1(1, "in %s storage function\n", "PLTE"); 517 if (png_ptr == NULL || info_ptr == NULL) 518 return; 519 520 /* 521 * It may not actually be necessary to set png_ptr->palette here; 522 * we do it for backward compatibility with the way the png_handle_tRNS 523 * function used to do the allocation. 524 */ 525#ifdef PNG_FREE_ME_SUPPORTED 526 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); 527#endif 528 529 /* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries, 530 in case of an invalid PNG file that has too-large sample values. */ 531 png_ptr->palette = (png_colorp)png_malloc(png_ptr, 532 256 * png_sizeof(png_color)); 533 png_memset(png_ptr->palette, 0, 256 * png_sizeof(png_color)); 534 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color)); 535 info_ptr->palette = png_ptr->palette; 536 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; 537 538#ifdef PNG_FREE_ME_SUPPORTED 539 info_ptr->free_me |= PNG_FREE_PLTE; 540#else 541 png_ptr->flags |= PNG_FLAG_FREE_PLTE; 542#endif 543 544 info_ptr->valid |= PNG_INFO_PLTE; 545} 546 547#if defined(PNG_sBIT_SUPPORTED) 548void PNGAPI 549png_set_sBIT(png_structp png_ptr, png_infop info_ptr, 550 png_color_8p sig_bit) 551{ 552 png_debug1(1, "in %s storage function\n", "sBIT"); 553 if (png_ptr == NULL || info_ptr == NULL) 554 return; 555 556 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof (png_color_8)); 557 info_ptr->valid |= PNG_INFO_sBIT; 558} 559#endif 560 561#if defined(PNG_sRGB_SUPPORTED) 562void PNGAPI 563png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) 564{ 565 png_debug1(1, "in %s storage function\n", "sRGB"); 566 if (png_ptr == NULL || info_ptr == NULL) 567 return; 568 569 info_ptr->srgb_intent = (png_byte)intent; 570 info_ptr->valid |= PNG_INFO_sRGB; 571} 572 573void PNGAPI 574png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, 575 int intent) 576{ 577#if defined(PNG_gAMA_SUPPORTED) 578#ifdef PNG_FLOATING_POINT_SUPPORTED 579 float file_gamma; 580#endif 581#ifdef PNG_FIXED_POINT_SUPPORTED 582 png_fixed_point int_file_gamma; 583#endif 584#endif 585#if defined(PNG_cHRM_SUPPORTED) 586#ifdef PNG_FLOATING_POINT_SUPPORTED 587 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; 588#endif 589#ifdef PNG_FIXED_POINT_SUPPORTED 590 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, 591 int_green_y, int_blue_x, int_blue_y; 592#endif 593#endif 594 png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM"); 595 if (png_ptr == NULL || info_ptr == NULL) 596 return; 597 598 png_set_sRGB(png_ptr, info_ptr, intent); 599 600#if defined(PNG_gAMA_SUPPORTED) 601#ifdef PNG_FLOATING_POINT_SUPPORTED 602 file_gamma = (float).45455; 603 png_set_gAMA(png_ptr, info_ptr, file_gamma); 604#endif 605#ifdef PNG_FIXED_POINT_SUPPORTED 606 int_file_gamma = 45455L; 607 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); 608#endif 609#endif 610 611#if defined(PNG_cHRM_SUPPORTED) 612#ifdef PNG_FIXED_POINT_SUPPORTED 613 int_white_x = 31270L; 614 int_white_y = 32900L; 615 int_red_x = 64000L; 616 int_red_y = 33000L; 617 int_green_x = 30000L; 618 int_green_y = 60000L; 619 int_blue_x = 15000L; 620 int_blue_y = 6000L; 621 622 png_set_cHRM_fixed(png_ptr, info_ptr, 623 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y, 624 int_blue_x, int_blue_y); 625#endif 626#ifdef PNG_FLOATING_POINT_SUPPORTED 627 white_x = (float).3127; 628 white_y = (float).3290; 629 red_x = (float).64; 630 red_y = (float).33; 631 green_x = (float).30; 632 green_y = (float).60; 633 blue_x = (float).15; 634 blue_y = (float).06; 635 636 png_set_cHRM(png_ptr, info_ptr, 637 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); 638#endif 639#endif 640} 641#endif 642 643 644#if defined(PNG_iCCP_SUPPORTED) 645void PNGAPI 646png_set_iCCP(png_structp png_ptr, png_infop info_ptr, 647 png_charp name, int compression_type, 648 png_charp profile, png_uint_32 proflen) 649{ 650 png_charp new_iccp_name; 651 png_charp new_iccp_profile; 652 653 png_debug1(1, "in %s storage function\n", "iCCP"); 654 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) 655 return; 656 657 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, png_strlen(name)+1); 658 if (new_iccp_name == NULL) 659 { 660 png_warning(png_ptr, "Insufficient memory to process iCCP chunk."); 661 return; 662 } 663 png_strcpy(new_iccp_name, name); 664 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen); 665 if (new_iccp_profile == NULL) 666 { 667 png_free (png_ptr, new_iccp_name); 668 png_warning(png_ptr, "Insufficient memory to process iCCP profile."); 669 return; 670 } 671 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); 672 673 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); 674 675 info_ptr->iccp_proflen = proflen; 676 info_ptr->iccp_name = new_iccp_name; 677 info_ptr->iccp_profile = new_iccp_profile; 678 /* Compression is always zero but is here so the API and info structure 679 * does not have to change if we introduce multiple compression types */ 680 info_ptr->iccp_compression = (png_byte)compression_type; 681#ifdef PNG_FREE_ME_SUPPORTED 682 info_ptr->free_me |= PNG_FREE_ICCP; 683#endif 684 info_ptr->valid |= PNG_INFO_iCCP; 685} 686#endif 687 688#if defined(PNG_TEXT_SUPPORTED) 689void PNGAPI 690png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, 691 int num_text) 692{ 693 int ret; 694 ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); 695 if (ret) 696 png_error(png_ptr, "Insufficient memory to store text"); 697} 698 699int /* PRIVATE */ 700png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, 701 int num_text) 702{ 703 int i; 704 705 png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ? 706 "text" : (png_const_charp)png_ptr->chunk_name)); 707 708 if (png_ptr == NULL || info_ptr == NULL || num_text == 0) 709 return(0); 710 711 /* Make sure we have enough space in the "text" array in info_struct 712 * to hold all of the incoming text_ptr objects. 713 */ 714 if (info_ptr->num_text + num_text > info_ptr->max_text) 715 { 716 if (info_ptr->text != NULL) 717 { 718 png_textp old_text; 719 int old_max; 720 721 old_max = info_ptr->max_text; 722 info_ptr->max_text = info_ptr->num_text + num_text + 8; 723 old_text = info_ptr->text; 724 info_ptr->text = (png_textp)png_malloc_warn(png_ptr, 725 (png_uint_32)(info_ptr->max_text * png_sizeof (png_text))); 726 if (info_ptr->text == NULL) 727 { 728 png_free(png_ptr, old_text); 729 return(1); 730 } 731 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * 732 png_sizeof(png_text))); 733 png_free(png_ptr, old_text); 734 } 735 else 736 { 737 info_ptr->max_text = num_text + 8; 738 info_ptr->num_text = 0; 739 info_ptr->text = (png_textp)png_malloc_warn(png_ptr, 740 (png_uint_32)(info_ptr->max_text * png_sizeof (png_text))); 741 if (info_ptr->text == NULL) 742 return(1); 743#ifdef PNG_FREE_ME_SUPPORTED 744 info_ptr->free_me |= PNG_FREE_TEXT; 745#endif 746 } 747 png_debug1(3, "allocated %d entries for info_ptr->text\n", 748 info_ptr->max_text); 749 } 750 for (i = 0; i < num_text; i++) 751 { 752 png_size_t text_length,key_len; 753 png_size_t lang_len,lang_key_len; 754 png_textp textp = &(info_ptr->text[info_ptr->num_text]); 755 756 if (text_ptr[i].key == NULL) 757 continue; 758 759 key_len = png_strlen(text_ptr[i].key); 760 761 if(text_ptr[i].compression <= 0) 762 { 763 lang_len = 0; 764 lang_key_len = 0; 765 } 766 else 767#ifdef PNG_iTXt_SUPPORTED 768 { 769 /* set iTXt data */ 770 if (text_ptr[i].lang != NULL) 771 lang_len = png_strlen(text_ptr[i].lang); 772 else 773 lang_len = 0; 774 if (text_ptr[i].lang_key != NULL) 775 lang_key_len = png_strlen(text_ptr[i].lang_key); 776 else 777 lang_key_len = 0; 778 } 779#else 780 { 781 png_warning(png_ptr, "iTXt chunk not supported."); 782 continue; 783 } 784#endif 785 786 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') 787 { 788 text_length = 0; 789#ifdef PNG_iTXt_SUPPORTED 790 if(text_ptr[i].compression > 0) 791 textp->compression = PNG_ITXT_COMPRESSION_NONE; 792 else 793#endif 794 textp->compression = PNG_TEXT_COMPRESSION_NONE; 795 } 796 else 797 { 798 text_length = png_strlen(text_ptr[i].text); 799 textp->compression = text_ptr[i].compression; 800 } 801 802 textp->key = (png_charp)png_malloc_warn(png_ptr, 803 (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4)); 804 if (textp->key == NULL) 805 return(1); 806 png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n", 807 (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4), 808 (int)textp->key); 809 810 png_memcpy(textp->key, text_ptr[i].key, 811 (png_size_t)(key_len)); 812 *(textp->key+key_len) = '\0'; 813#ifdef PNG_iTXt_SUPPORTED 814 if (text_ptr[i].compression > 0) 815 { 816 textp->lang=textp->key + key_len + 1; 817 png_memcpy(textp->lang, text_ptr[i].lang, lang_len); 818 *(textp->lang+lang_len) = '\0'; 819 textp->lang_key=textp->lang + lang_len + 1; 820 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); 821 *(textp->lang_key+lang_key_len) = '\0'; 822 textp->text=textp->lang_key + lang_key_len + 1; 823 } 824 else 825#endif 826 { 827#ifdef PNG_iTXt_SUPPORTED 828 textp->lang=NULL; 829 textp->lang_key=NULL; 830#endif 831 textp->text=textp->key + key_len + 1; 832 } 833 if(text_length) 834 png_memcpy(textp->text, text_ptr[i].text, 835 (png_size_t)(text_length)); 836 *(textp->text+text_length) = '\0'; 837 838#ifdef PNG_iTXt_SUPPORTED 839 if(textp->compression > 0) 840 { 841 textp->text_length = 0; 842 textp->itxt_length = text_length; 843 } 844 else 845#endif 846 { 847 textp->text_length = text_length; 848#ifdef PNG_iTXt_SUPPORTED 849 textp->itxt_length = 0; 850#endif 851 } 852 info_ptr->text[info_ptr->num_text]= *textp; 853 info_ptr->num_text++; 854 png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); 855 } 856 return(0); 857} 858#endif 859 860#if defined(PNG_tIME_SUPPORTED) 861void PNGAPI 862png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) 863{ 864 png_debug1(1, "in %s storage function\n", "tIME"); 865 if (png_ptr == NULL || info_ptr == NULL || 866 (png_ptr->mode & PNG_WROTE_tIME)) 867 return; 868 869 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof (png_time)); 870 info_ptr->valid |= PNG_INFO_tIME; 871} 872#endif 873 874#if defined(PNG_tRNS_SUPPORTED) 875void PNGAPI 876png_set_tRNS(png_structp png_ptr, png_infop info_ptr, 877 png_bytep trans, int num_trans, png_color_16p trans_values) 878{ 879 png_debug1(1, "in %s storage function\n", "tRNS"); 880 if (png_ptr == NULL || info_ptr == NULL) 881 return; 882 883 if (trans != NULL) 884 { 885 /* 886 * It may not actually be necessary to set png_ptr->trans here; 887 * we do it for backward compatibility with the way the png_handle_tRNS 888 * function used to do the allocation. 889 */ 890#ifdef PNG_FREE_ME_SUPPORTED 891 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); 892#endif 893 /* Changed from num_trans to 256 in version 1.2.1 */ 894 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr, 895 (png_uint_32)256); 896 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans); 897#ifdef PNG_FREE_ME_SUPPORTED 898 info_ptr->free_me |= PNG_FREE_TRNS; 899#else 900 png_ptr->flags |= PNG_FLAG_FREE_TRNS; 901#endif 902 } 903 904 if (trans_values != NULL) 905 { 906 png_memcpy(&(info_ptr->trans_values), trans_values, 907 png_sizeof(png_color_16)); 908 if (num_trans == 0) 909 num_trans = 1; 910 } 911 info_ptr->num_trans = (png_uint_16)num_trans; 912 info_ptr->valid |= PNG_INFO_tRNS; 913} 914#endif 915 916#if defined(PNG_sPLT_SUPPORTED) 917void PNGAPI 918png_set_sPLT(png_structp png_ptr, 919 png_infop info_ptr, png_sPLT_tp entries, int nentries) 920{ 921 png_sPLT_tp np; 922 int i; 923 924 np = (png_sPLT_tp)png_malloc_warn(png_ptr, 925 (info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t)); 926 if (np == NULL) 927 { 928 png_warning(png_ptr, "No memory for sPLT palettes."); 929 return; 930 } 931 932 png_memcpy(np, info_ptr->splt_palettes, 933 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); 934 png_free(png_ptr, info_ptr->splt_palettes); 935 info_ptr->splt_palettes=NULL; 936 937 for (i = 0; i < nentries; i++) 938 { 939 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; 940 png_sPLT_tp from = entries + i; 941 942 to->name = (png_charp)png_malloc(png_ptr, 943 png_strlen(from->name) + 1); 944 /* TODO: use png_malloc_warn */ 945 png_strcpy(to->name, from->name); 946 to->entries = (png_sPLT_entryp)png_malloc(png_ptr, 947 from->nentries * png_sizeof(png_sPLT_t)); 948 /* TODO: use png_malloc_warn */ 949 png_memcpy(to->entries, from->entries, 950 from->nentries * png_sizeof(png_sPLT_t)); 951 to->nentries = from->nentries; 952 to->depth = from->depth; 953 } 954 955 info_ptr->splt_palettes = np; 956 info_ptr->splt_palettes_num += nentries; 957 info_ptr->valid |= PNG_INFO_sPLT; 958#ifdef PNG_FREE_ME_SUPPORTED 959 info_ptr->free_me |= PNG_FREE_SPLT; 960#endif 961} 962#endif /* PNG_sPLT_SUPPORTED */ 963 964#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) 965void PNGAPI 966png_set_unknown_chunks(png_structp png_ptr, 967 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) 968{ 969 png_unknown_chunkp np; 970 int i; 971 972 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) 973 return; 974 975 np = (png_unknown_chunkp)png_malloc_warn(png_ptr, 976 (info_ptr->unknown_chunks_num + num_unknowns) * 977 png_sizeof(png_unknown_chunk)); 978 if (np == NULL) 979 { 980 png_warning(png_ptr, "Out of memory while processing unknown chunk."); 981 return; 982 } 983 984 png_memcpy(np, info_ptr->unknown_chunks, 985 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk)); 986 png_free(png_ptr, info_ptr->unknown_chunks); 987 info_ptr->unknown_chunks=NULL; 988 989 for (i = 0; i < num_unknowns; i++) 990 { 991 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; 992 png_unknown_chunkp from = unknowns + i; 993 994 png_strncpy((png_charp)to->name, (png_charp)from->name, 5); 995 to->data = (png_bytep)png_malloc_warn(png_ptr, from->size); 996 if (to->data == NULL) 997 { 998 png_warning(png_ptr, "Out of memory processing unknown chunk."); 999 } 1000 else 1001 { 1002 png_memcpy(to->data, from->data, from->size); 1003 to->size = from->size; 1004 1005 /* note our location in the read or write sequence */ 1006 to->location = (png_byte)(png_ptr->mode & 0xff); 1007 } 1008 } 1009 1010 info_ptr->unknown_chunks = np; 1011 info_ptr->unknown_chunks_num += num_unknowns; 1012#ifdef PNG_FREE_ME_SUPPORTED 1013 info_ptr->free_me |= PNG_FREE_UNKN; 1014#endif 1015} 1016void PNGAPI 1017png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, 1018 int chunk, int location) 1019{ 1020 if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < 1021 (int)info_ptr->unknown_chunks_num) 1022 info_ptr->unknown_chunks[chunk].location = (png_byte)location; 1023} 1024#endif 1025 1026#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ 1027 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) 1028void PNGAPI 1029png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) 1030{ 1031 /* This function is deprecated in favor of png_permit_mng_features() 1032 and will be removed from libpng-2.0.0 */ 1033 png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n"); 1034 if (png_ptr == NULL) 1035 return; 1036 png_ptr->mng_features_permitted = (png_byte) 1037 ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) | 1038 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE))); 1039} 1040#endif 1041 1042#if defined(PNG_MNG_FEATURES_SUPPORTED) 1043png_uint_32 PNGAPI 1044png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) 1045{ 1046 png_debug(1, "in png_permit_mng_features\n"); 1047 if (png_ptr == NULL) 1048 return (png_uint_32)0; 1049 png_ptr->mng_features_permitted = 1050 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); 1051 return (png_uint_32)png_ptr->mng_features_permitted; 1052} 1053#endif 1054 1055#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) 1056void PNGAPI 1057png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep 1058 chunk_list, int num_chunks) 1059{ 1060 png_bytep new_list, p; 1061 int i, old_num_chunks; 1062 if (num_chunks == 0) 1063 { 1064 if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) 1065 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; 1066 else 1067 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; 1068 1069 if(keep == PNG_HANDLE_CHUNK_ALWAYS) 1070 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; 1071 else 1072 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; 1073 return; 1074 } 1075 if (chunk_list == NULL) 1076 return; 1077 old_num_chunks=png_ptr->num_chunk_list; 1078 new_list=(png_bytep)png_malloc(png_ptr, 1079 (png_uint_32)(5*(num_chunks+old_num_chunks))); 1080 if(png_ptr->chunk_list != NULL) 1081 { 1082 png_memcpy(new_list, png_ptr->chunk_list, 1083 (png_size_t)(5*old_num_chunks)); 1084 png_free(png_ptr, png_ptr->chunk_list); 1085 png_ptr->chunk_list=NULL; 1086 } 1087 png_memcpy(new_list+5*old_num_chunks, chunk_list, 1088 (png_size_t)(5*num_chunks)); 1089 for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5) 1090 *p=(png_byte)keep; 1091 png_ptr->num_chunk_list=old_num_chunks+num_chunks; 1092 png_ptr->chunk_list=new_list; 1093#ifdef PNG_FREE_ME_SUPPORTED 1094 png_ptr->free_me |= PNG_FREE_LIST; 1095#endif 1096} 1097#endif 1098 1099#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) 1100void PNGAPI 1101png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, 1102 png_user_chunk_ptr read_user_chunk_fn) 1103{ 1104 png_debug(1, "in png_set_read_user_chunk_fn\n"); 1105 png_ptr->read_user_chunk_fn = read_user_chunk_fn; 1106 png_ptr->user_chunk_ptr = user_chunk_ptr; 1107} 1108#endif 1109 1110#if defined(PNG_INFO_IMAGE_SUPPORTED) 1111void PNGAPI 1112png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) 1113{ 1114 png_debug1(1, "in %s storage function\n", "rows"); 1115 1116 if (png_ptr == NULL || info_ptr == NULL) 1117 return; 1118 1119 if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) 1120 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); 1121 info_ptr->row_pointers = row_pointers; 1122 if(row_pointers) 1123 info_ptr->valid |= PNG_INFO_IDAT; 1124} 1125#endif 1126 1127#ifdef PNG_WRITE_SUPPORTED 1128void PNGAPI 1129png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size) 1130{ 1131 if(png_ptr->zbuf) 1132 png_free(png_ptr, png_ptr->zbuf); 1133 png_ptr->zbuf_size = (png_size_t)size; 1134 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); 1135 png_ptr->zstream.next_out = png_ptr->zbuf; 1136 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; 1137} 1138#endif 1139 1140void PNGAPI 1141png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) 1142{ 1143 if (png_ptr && info_ptr) 1144 info_ptr->valid &= ~(mask); 1145} 1146 1147 1148#ifndef PNG_1_0_X 1149#ifdef PNG_ASSEMBLER_CODE_SUPPORTED 1150/* this function was added to libpng 1.2.0 and should always exist by default */ 1151void PNGAPI 1152png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags) 1153{ 1154 png_uint_32 settable_asm_flags; 1155 png_uint_32 settable_mmx_flags; 1156 1157 settable_mmx_flags = 1158#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW 1159 PNG_ASM_FLAG_MMX_READ_COMBINE_ROW | 1160#endif 1161#ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE 1162 PNG_ASM_FLAG_MMX_READ_INTERLACE | 1163#endif 1164#ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW 1165 PNG_ASM_FLAG_MMX_READ_FILTER_SUB | 1166 PNG_ASM_FLAG_MMX_READ_FILTER_UP | 1167 PNG_ASM_FLAG_MMX_READ_FILTER_AVG | 1168 PNG_ASM_FLAG_MMX_READ_FILTER_PAETH | 1169#endif 1170 0; 1171 1172 /* could be some non-MMX ones in the future, but not currently: */ 1173 settable_asm_flags = settable_mmx_flags; 1174 1175 if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) || 1176 !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU)) 1177 { 1178 /* clear all MMX flags if MMX isn't supported */ 1179 settable_asm_flags &= ~settable_mmx_flags; 1180 png_ptr->asm_flags &= ~settable_mmx_flags; 1181 } 1182 1183 /* we're replacing the settable bits with those passed in by the user, 1184 * so first zero them out of the master copy, then logical-OR in the 1185 * allowed subset that was requested */ 1186 1187 png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */ 1188 png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */ 1189} 1190#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ 1191 1192#ifdef PNG_ASSEMBLER_CODE_SUPPORTED 1193/* this function was added to libpng 1.2.0 */ 1194void PNGAPI 1195png_set_mmx_thresholds (png_structp png_ptr, 1196 png_byte mmx_bitdepth_threshold, 1197 png_uint_32 mmx_rowbytes_threshold) 1198{ 1199 png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold; 1200 png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold; 1201} 1202#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ 1203 1204#ifdef PNG_SET_USER_LIMITS_SUPPORTED 1205/* this function was added to libpng 1.2.6 */ 1206void PNGAPI 1207png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, 1208 png_uint_32 user_height_max) 1209{ 1210 /* Images with dimensions larger than these limits will be 1211 * rejected by png_set_IHDR(). To accept any PNG datastream 1212 * regardless of dimensions, set both limits to 0x7ffffffL. 1213 */ 1214 png_ptr->user_width_max = user_width_max; 1215 png_ptr->user_height_max = user_height_max; 1216} 1217#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ 1218 1219#endif /* ?PNG_1_0_X */