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annotate libs/libpng/pngset.c @ 14:06dc8b9b4f89

find changesets by author, revision, files, or words in the commit message
added libimago, libjpeg and libpng
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 07 Jun 2015 17:25:49 +0300
parents
children
rev   line source
nuclear@14 1
nuclear@14 2 /* pngset.c - storage of image information into info struct
nuclear@14 3 *
nuclear@14 4 * Last changed in libpng 1.2.30 [August 15, 2008]
nuclear@14 5 * For conditions of distribution and use, see copyright notice in png.h
nuclear@14 6 * Copyright (c) 1998-2008 Glenn Randers-Pehrson
nuclear@14 7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
nuclear@14 8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
nuclear@14 9 *
nuclear@14 10 * The functions here are used during reads to store data from the file
nuclear@14 11 * into the info struct, and during writes to store application data
nuclear@14 12 * into the info struct for writing into the file. This abstracts the
nuclear@14 13 * info struct and allows us to change the structure in the future.
nuclear@14 14 */
nuclear@14 15
nuclear@14 16 #define PNG_INTERNAL
nuclear@14 17 #include "png.h"
nuclear@14 18 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
nuclear@14 19
nuclear@14 20 #if defined(PNG_bKGD_SUPPORTED)
nuclear@14 21 void PNGAPI
nuclear@14 22 png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
nuclear@14 23 {
nuclear@14 24 png_debug1(1, "in %s storage function\n", "bKGD");
nuclear@14 25 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 26 return;
nuclear@14 27
nuclear@14 28 png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
nuclear@14 29 info_ptr->valid |= PNG_INFO_bKGD;
nuclear@14 30 }
nuclear@14 31 #endif
nuclear@14 32
nuclear@14 33 #if defined(PNG_cHRM_SUPPORTED)
nuclear@14 34 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 35 void PNGAPI
nuclear@14 36 png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
nuclear@14 37 double white_x, double white_y, double red_x, double red_y,
nuclear@14 38 double green_x, double green_y, double blue_x, double blue_y)
nuclear@14 39 {
nuclear@14 40 png_debug1(1, "in %s storage function\n", "cHRM");
nuclear@14 41 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 42 return;
nuclear@14 43 if (!(white_x || white_y || red_x || red_y || green_x || green_y ||
nuclear@14 44 blue_x || blue_y))
nuclear@14 45 {
nuclear@14 46 png_warning(png_ptr,
nuclear@14 47 "Ignoring attempt to set all-zero chromaticity values");
nuclear@14 48 return;
nuclear@14 49 }
nuclear@14 50 if (white_x < 0.0 || white_y < 0.0 ||
nuclear@14 51 red_x < 0.0 || red_y < 0.0 ||
nuclear@14 52 green_x < 0.0 || green_y < 0.0 ||
nuclear@14 53 blue_x < 0.0 || blue_y < 0.0)
nuclear@14 54 {
nuclear@14 55 png_warning(png_ptr,
nuclear@14 56 "Ignoring attempt to set negative chromaticity value");
nuclear@14 57 return;
nuclear@14 58 }
nuclear@14 59 if (white_x > 21474.83 || white_y > 21474.83 ||
nuclear@14 60 red_x > 21474.83 || red_y > 21474.83 ||
nuclear@14 61 green_x > 21474.83 || green_y > 21474.83 ||
nuclear@14 62 blue_x > 21474.83 || blue_y > 21474.83)
nuclear@14 63 {
nuclear@14 64 png_warning(png_ptr,
nuclear@14 65 "Ignoring attempt to set chromaticity value exceeding 21474.83");
nuclear@14 66 return;
nuclear@14 67 }
nuclear@14 68
nuclear@14 69 info_ptr->x_white = (float)white_x;
nuclear@14 70 info_ptr->y_white = (float)white_y;
nuclear@14 71 info_ptr->x_red = (float)red_x;
nuclear@14 72 info_ptr->y_red = (float)red_y;
nuclear@14 73 info_ptr->x_green = (float)green_x;
nuclear@14 74 info_ptr->y_green = (float)green_y;
nuclear@14 75 info_ptr->x_blue = (float)blue_x;
nuclear@14 76 info_ptr->y_blue = (float)blue_y;
nuclear@14 77 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 78 info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
nuclear@14 79 info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
nuclear@14 80 info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
nuclear@14 81 info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
nuclear@14 82 info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
nuclear@14 83 info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
nuclear@14 84 info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
nuclear@14 85 info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
nuclear@14 86 #endif
nuclear@14 87 info_ptr->valid |= PNG_INFO_cHRM;
nuclear@14 88 }
nuclear@14 89 #endif
nuclear@14 90 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 91 void PNGAPI
nuclear@14 92 png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
nuclear@14 93 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
nuclear@14 94 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
nuclear@14 95 png_fixed_point blue_x, png_fixed_point blue_y)
nuclear@14 96 {
nuclear@14 97 png_debug1(1, "in %s storage function\n", "cHRM");
nuclear@14 98 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 99 return;
nuclear@14 100
nuclear@14 101 if (!(white_x || white_y || red_x || red_y || green_x || green_y ||
nuclear@14 102 blue_x || blue_y))
nuclear@14 103 {
nuclear@14 104 png_warning(png_ptr,
nuclear@14 105 "Ignoring attempt to set all-zero chromaticity values");
nuclear@14 106 return;
nuclear@14 107 }
nuclear@14 108 if (white_x < 0 || white_y < 0 ||
nuclear@14 109 red_x < 0 || red_y < 0 ||
nuclear@14 110 green_x < 0 || green_y < 0 ||
nuclear@14 111 blue_x < 0 || blue_y < 0)
nuclear@14 112 {
nuclear@14 113 png_warning(png_ptr,
nuclear@14 114 "Ignoring attempt to set negative chromaticity value");
nuclear@14 115 return;
nuclear@14 116 }
nuclear@14 117 if (white_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@14 118 white_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@14 119 red_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@14 120 red_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@14 121 green_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@14 122 green_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@14 123 blue_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@14 124 blue_y > (png_fixed_point) PNG_UINT_31_MAX )
nuclear@14 125 {
nuclear@14 126 png_warning(png_ptr,
nuclear@14 127 "Ignoring attempt to set chromaticity value exceeding 21474.83");
nuclear@14 128 return;
nuclear@14 129 }
nuclear@14 130 info_ptr->int_x_white = white_x;
nuclear@14 131 info_ptr->int_y_white = white_y;
nuclear@14 132 info_ptr->int_x_red = red_x;
nuclear@14 133 info_ptr->int_y_red = red_y;
nuclear@14 134 info_ptr->int_x_green = green_x;
nuclear@14 135 info_ptr->int_y_green = green_y;
nuclear@14 136 info_ptr->int_x_blue = blue_x;
nuclear@14 137 info_ptr->int_y_blue = blue_y;
nuclear@14 138 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 139 info_ptr->x_white = (float)(white_x/100000.);
nuclear@14 140 info_ptr->y_white = (float)(white_y/100000.);
nuclear@14 141 info_ptr->x_red = (float)( red_x/100000.);
nuclear@14 142 info_ptr->y_red = (float)( red_y/100000.);
nuclear@14 143 info_ptr->x_green = (float)(green_x/100000.);
nuclear@14 144 info_ptr->y_green = (float)(green_y/100000.);
nuclear@14 145 info_ptr->x_blue = (float)( blue_x/100000.);
nuclear@14 146 info_ptr->y_blue = (float)( blue_y/100000.);
nuclear@14 147 #endif
nuclear@14 148 info_ptr->valid |= PNG_INFO_cHRM;
nuclear@14 149 }
nuclear@14 150 #endif
nuclear@14 151 #endif
nuclear@14 152
nuclear@14 153 #if defined(PNG_gAMA_SUPPORTED)
nuclear@14 154 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 155 void PNGAPI
nuclear@14 156 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
nuclear@14 157 {
nuclear@14 158 double gamma;
nuclear@14 159 png_debug1(1, "in %s storage function\n", "gAMA");
nuclear@14 160 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 161 return;
nuclear@14 162
nuclear@14 163 /* Check for overflow */
nuclear@14 164 if (file_gamma > 21474.83)
nuclear@14 165 {
nuclear@14 166 png_warning(png_ptr, "Limiting gamma to 21474.83");
nuclear@14 167 gamma=21474.83;
nuclear@14 168 }
nuclear@14 169 else
nuclear@14 170 gamma = file_gamma;
nuclear@14 171 info_ptr->gamma = (float)gamma;
nuclear@14 172 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 173 info_ptr->int_gamma = (int)(gamma*100000.+.5);
nuclear@14 174 #endif
nuclear@14 175 info_ptr->valid |= PNG_INFO_gAMA;
nuclear@14 176 if (gamma == 0.0)
nuclear@14 177 png_warning(png_ptr, "Setting gamma=0");
nuclear@14 178 }
nuclear@14 179 #endif
nuclear@14 180 void PNGAPI
nuclear@14 181 png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
nuclear@14 182 int_gamma)
nuclear@14 183 {
nuclear@14 184 png_fixed_point gamma;
nuclear@14 185
nuclear@14 186 png_debug1(1, "in %s storage function\n", "gAMA");
nuclear@14 187 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 188 return;
nuclear@14 189
nuclear@14 190 if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
nuclear@14 191 {
nuclear@14 192 png_warning(png_ptr, "Limiting gamma to 21474.83");
nuclear@14 193 gamma=PNG_UINT_31_MAX;
nuclear@14 194 }
nuclear@14 195 else
nuclear@14 196 {
nuclear@14 197 if (int_gamma < 0)
nuclear@14 198 {
nuclear@14 199 png_warning(png_ptr, "Setting negative gamma to zero");
nuclear@14 200 gamma = 0;
nuclear@14 201 }
nuclear@14 202 else
nuclear@14 203 gamma = int_gamma;
nuclear@14 204 }
nuclear@14 205 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 206 info_ptr->gamma = (float)(gamma/100000.);
nuclear@14 207 #endif
nuclear@14 208 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 209 info_ptr->int_gamma = gamma;
nuclear@14 210 #endif
nuclear@14 211 info_ptr->valid |= PNG_INFO_gAMA;
nuclear@14 212 if (gamma == 0)
nuclear@14 213 png_warning(png_ptr, "Setting gamma=0");
nuclear@14 214 }
nuclear@14 215 #endif
nuclear@14 216
nuclear@14 217 #if defined(PNG_hIST_SUPPORTED)
nuclear@14 218 void PNGAPI
nuclear@14 219 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
nuclear@14 220 {
nuclear@14 221 int i;
nuclear@14 222
nuclear@14 223 png_debug1(1, "in %s storage function\n", "hIST");
nuclear@14 224 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 225 return;
nuclear@14 226 if (info_ptr->num_palette == 0 || info_ptr->num_palette
nuclear@14 227 > PNG_MAX_PALETTE_LENGTH)
nuclear@14 228 {
nuclear@14 229 png_warning(png_ptr,
nuclear@14 230 "Invalid palette size, hIST allocation skipped.");
nuclear@14 231 return;
nuclear@14 232 }
nuclear@14 233
nuclear@14 234 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 235 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
nuclear@14 236 #endif
nuclear@14 237 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version
nuclear@14 238 1.2.1 */
nuclear@14 239 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
nuclear@14 240 (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
nuclear@14 241 if (png_ptr->hist == NULL)
nuclear@14 242 {
nuclear@14 243 png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
nuclear@14 244 return;
nuclear@14 245 }
nuclear@14 246
nuclear@14 247 for (i = 0; i < info_ptr->num_palette; i++)
nuclear@14 248 png_ptr->hist[i] = hist[i];
nuclear@14 249 info_ptr->hist = png_ptr->hist;
nuclear@14 250 info_ptr->valid |= PNG_INFO_hIST;
nuclear@14 251
nuclear@14 252 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 253 info_ptr->free_me |= PNG_FREE_HIST;
nuclear@14 254 #else
nuclear@14 255 png_ptr->flags |= PNG_FLAG_FREE_HIST;
nuclear@14 256 #endif
nuclear@14 257 }
nuclear@14 258 #endif
nuclear@14 259
nuclear@14 260 void PNGAPI
nuclear@14 261 png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
nuclear@14 262 png_uint_32 width, png_uint_32 height, int bit_depth,
nuclear@14 263 int color_type, int interlace_type, int compression_type,
nuclear@14 264 int filter_type)
nuclear@14 265 {
nuclear@14 266 png_debug1(1, "in %s storage function\n", "IHDR");
nuclear@14 267 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 268 return;
nuclear@14 269
nuclear@14 270 /* check for width and height valid values */
nuclear@14 271 if (width == 0 || height == 0)
nuclear@14 272 png_error(png_ptr, "Image width or height is zero in IHDR");
nuclear@14 273 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
nuclear@14 274 if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
nuclear@14 275 png_error(png_ptr, "image size exceeds user limits in IHDR");
nuclear@14 276 #else
nuclear@14 277 if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
nuclear@14 278 png_error(png_ptr, "image size exceeds user limits in IHDR");
nuclear@14 279 #endif
nuclear@14 280 if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
nuclear@14 281 png_error(png_ptr, "Invalid image size in IHDR");
nuclear@14 282 if ( width > (PNG_UINT_32_MAX
nuclear@14 283 >> 3) /* 8-byte RGBA pixels */
nuclear@14 284 - 64 /* bigrowbuf hack */
nuclear@14 285 - 1 /* filter byte */
nuclear@14 286 - 7*8 /* rounding of width to multiple of 8 pixels */
nuclear@14 287 - 8) /* extra max_pixel_depth pad */
nuclear@14 288 png_warning(png_ptr, "Width is too large for libpng to process pixels");
nuclear@14 289
nuclear@14 290 /* check other values */
nuclear@14 291 if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
nuclear@14 292 bit_depth != 8 && bit_depth != 16)
nuclear@14 293 png_error(png_ptr, "Invalid bit depth in IHDR");
nuclear@14 294
nuclear@14 295 if (color_type < 0 || color_type == 1 ||
nuclear@14 296 color_type == 5 || color_type > 6)
nuclear@14 297 png_error(png_ptr, "Invalid color type in IHDR");
nuclear@14 298
nuclear@14 299 if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
nuclear@14 300 ((color_type == PNG_COLOR_TYPE_RGB ||
nuclear@14 301 color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
nuclear@14 302 color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
nuclear@14 303 png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
nuclear@14 304
nuclear@14 305 if (interlace_type >= PNG_INTERLACE_LAST)
nuclear@14 306 png_error(png_ptr, "Unknown interlace method in IHDR");
nuclear@14 307
nuclear@14 308 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
nuclear@14 309 png_error(png_ptr, "Unknown compression method in IHDR");
nuclear@14 310
nuclear@14 311 #if defined(PNG_MNG_FEATURES_SUPPORTED)
nuclear@14 312 /* Accept filter_method 64 (intrapixel differencing) only if
nuclear@14 313 * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
nuclear@14 314 * 2. Libpng did not read a PNG signature (this filter_method is only
nuclear@14 315 * used in PNG datastreams that are embedded in MNG datastreams) and
nuclear@14 316 * 3. The application called png_permit_mng_features with a mask that
nuclear@14 317 * included PNG_FLAG_MNG_FILTER_64 and
nuclear@14 318 * 4. The filter_method is 64 and
nuclear@14 319 * 5. The color_type is RGB or RGBA
nuclear@14 320 */
nuclear@14 321 if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
nuclear@14 322 png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
nuclear@14 323 if (filter_type != PNG_FILTER_TYPE_BASE)
nuclear@14 324 {
nuclear@14 325 if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
nuclear@14 326 (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
nuclear@14 327 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
nuclear@14 328 (color_type == PNG_COLOR_TYPE_RGB ||
nuclear@14 329 color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
nuclear@14 330 png_error(png_ptr, "Unknown filter method in IHDR");
nuclear@14 331 if (png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
nuclear@14 332 png_warning(png_ptr, "Invalid filter method in IHDR");
nuclear@14 333 }
nuclear@14 334 #else
nuclear@14 335 if (filter_type != PNG_FILTER_TYPE_BASE)
nuclear@14 336 png_error(png_ptr, "Unknown filter method in IHDR");
nuclear@14 337 #endif
nuclear@14 338
nuclear@14 339 info_ptr->width = width;
nuclear@14 340 info_ptr->height = height;
nuclear@14 341 info_ptr->bit_depth = (png_byte)bit_depth;
nuclear@14 342 info_ptr->color_type =(png_byte) color_type;
nuclear@14 343 info_ptr->compression_type = (png_byte)compression_type;
nuclear@14 344 info_ptr->filter_type = (png_byte)filter_type;
nuclear@14 345 info_ptr->interlace_type = (png_byte)interlace_type;
nuclear@14 346 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
nuclear@14 347 info_ptr->channels = 1;
nuclear@14 348 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
nuclear@14 349 info_ptr->channels = 3;
nuclear@14 350 else
nuclear@14 351 info_ptr->channels = 1;
nuclear@14 352 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
nuclear@14 353 info_ptr->channels++;
nuclear@14 354 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
nuclear@14 355
nuclear@14 356 /* check for potential overflow */
nuclear@14 357 if (width > (PNG_UINT_32_MAX
nuclear@14 358 >> 3) /* 8-byte RGBA pixels */
nuclear@14 359 - 64 /* bigrowbuf hack */
nuclear@14 360 - 1 /* filter byte */
nuclear@14 361 - 7*8 /* rounding of width to multiple of 8 pixels */
nuclear@14 362 - 8) /* extra max_pixel_depth pad */
nuclear@14 363 info_ptr->rowbytes = (png_size_t)0;
nuclear@14 364 else
nuclear@14 365 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
nuclear@14 366 }
nuclear@14 367
nuclear@14 368 #if defined(PNG_oFFs_SUPPORTED)
nuclear@14 369 void PNGAPI
nuclear@14 370 png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
nuclear@14 371 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
nuclear@14 372 {
nuclear@14 373 png_debug1(1, "in %s storage function\n", "oFFs");
nuclear@14 374 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 375 return;
nuclear@14 376
nuclear@14 377 info_ptr->x_offset = offset_x;
nuclear@14 378 info_ptr->y_offset = offset_y;
nuclear@14 379 info_ptr->offset_unit_type = (png_byte)unit_type;
nuclear@14 380 info_ptr->valid |= PNG_INFO_oFFs;
nuclear@14 381 }
nuclear@14 382 #endif
nuclear@14 383
nuclear@14 384 #if defined(PNG_pCAL_SUPPORTED)
nuclear@14 385 void PNGAPI
nuclear@14 386 png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
nuclear@14 387 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
nuclear@14 388 png_charp units, png_charpp params)
nuclear@14 389 {
nuclear@14 390 png_uint_32 length;
nuclear@14 391 int i;
nuclear@14 392
nuclear@14 393 png_debug1(1, "in %s storage function\n", "pCAL");
nuclear@14 394 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 395 return;
nuclear@14 396
nuclear@14 397 length = png_strlen(purpose) + 1;
nuclear@14 398 png_debug1(3, "allocating purpose for info (%lu bytes)\n",
nuclear@14 399 (unsigned long)length);
nuclear@14 400 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@14 401 if (info_ptr->pcal_purpose == NULL)
nuclear@14 402 {
nuclear@14 403 png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
nuclear@14 404 return;
nuclear@14 405 }
nuclear@14 406 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
nuclear@14 407
nuclear@14 408 png_debug(3, "storing X0, X1, type, and nparams in info\n");
nuclear@14 409 info_ptr->pcal_X0 = X0;
nuclear@14 410 info_ptr->pcal_X1 = X1;
nuclear@14 411 info_ptr->pcal_type = (png_byte)type;
nuclear@14 412 info_ptr->pcal_nparams = (png_byte)nparams;
nuclear@14 413
nuclear@14 414 length = png_strlen(units) + 1;
nuclear@14 415 png_debug1(3, "allocating units for info (%lu bytes)\n",
nuclear@14 416 (unsigned long)length);
nuclear@14 417 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@14 418 if (info_ptr->pcal_units == NULL)
nuclear@14 419 {
nuclear@14 420 png_warning(png_ptr, "Insufficient memory for pCAL units.");
nuclear@14 421 return;
nuclear@14 422 }
nuclear@14 423 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
nuclear@14 424
nuclear@14 425 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
nuclear@14 426 (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
nuclear@14 427 if (info_ptr->pcal_params == NULL)
nuclear@14 428 {
nuclear@14 429 png_warning(png_ptr, "Insufficient memory for pCAL params.");
nuclear@14 430 return;
nuclear@14 431 }
nuclear@14 432
nuclear@14 433 info_ptr->pcal_params[nparams] = NULL;
nuclear@14 434
nuclear@14 435 for (i = 0; i < nparams; i++)
nuclear@14 436 {
nuclear@14 437 length = png_strlen(params[i]) + 1;
nuclear@14 438 png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i,
nuclear@14 439 (unsigned long)length);
nuclear@14 440 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@14 441 if (info_ptr->pcal_params[i] == NULL)
nuclear@14 442 {
nuclear@14 443 png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
nuclear@14 444 return;
nuclear@14 445 }
nuclear@14 446 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
nuclear@14 447 }
nuclear@14 448
nuclear@14 449 info_ptr->valid |= PNG_INFO_pCAL;
nuclear@14 450 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 451 info_ptr->free_me |= PNG_FREE_PCAL;
nuclear@14 452 #endif
nuclear@14 453 }
nuclear@14 454 #endif
nuclear@14 455
nuclear@14 456 #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
nuclear@14 457 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 458 void PNGAPI
nuclear@14 459 png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
nuclear@14 460 int unit, double width, double height)
nuclear@14 461 {
nuclear@14 462 png_debug1(1, "in %s storage function\n", "sCAL");
nuclear@14 463 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 464 return;
nuclear@14 465
nuclear@14 466 info_ptr->scal_unit = (png_byte)unit;
nuclear@14 467 info_ptr->scal_pixel_width = width;
nuclear@14 468 info_ptr->scal_pixel_height = height;
nuclear@14 469
nuclear@14 470 info_ptr->valid |= PNG_INFO_sCAL;
nuclear@14 471 }
nuclear@14 472 #else
nuclear@14 473 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 474 void PNGAPI
nuclear@14 475 png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
nuclear@14 476 int unit, png_charp swidth, png_charp sheight)
nuclear@14 477 {
nuclear@14 478 png_uint_32 length;
nuclear@14 479
nuclear@14 480 png_debug1(1, "in %s storage function\n", "sCAL");
nuclear@14 481 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 482 return;
nuclear@14 483
nuclear@14 484 info_ptr->scal_unit = (png_byte)unit;
nuclear@14 485
nuclear@14 486 length = png_strlen(swidth) + 1;
nuclear@14 487 png_debug1(3, "allocating unit for info (%u bytes)\n",
nuclear@14 488 (unsigned int)length);
nuclear@14 489 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@14 490 if (info_ptr->scal_s_width == NULL)
nuclear@14 491 {
nuclear@14 492 png_warning(png_ptr,
nuclear@14 493 "Memory allocation failed while processing sCAL.");
nuclear@14 494 return;
nuclear@14 495 }
nuclear@14 496 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
nuclear@14 497
nuclear@14 498 length = png_strlen(sheight) + 1;
nuclear@14 499 png_debug1(3, "allocating unit for info (%u bytes)\n",
nuclear@14 500 (unsigned int)length);
nuclear@14 501 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@14 502 if (info_ptr->scal_s_height == NULL)
nuclear@14 503 {
nuclear@14 504 png_free (png_ptr, info_ptr->scal_s_width);
nuclear@14 505 info_ptr->scal_s_width = NULL;
nuclear@14 506 png_warning(png_ptr,
nuclear@14 507 "Memory allocation failed while processing sCAL.");
nuclear@14 508 return;
nuclear@14 509 }
nuclear@14 510 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
nuclear@14 511 info_ptr->valid |= PNG_INFO_sCAL;
nuclear@14 512 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 513 info_ptr->free_me |= PNG_FREE_SCAL;
nuclear@14 514 #endif
nuclear@14 515 }
nuclear@14 516 #endif
nuclear@14 517 #endif
nuclear@14 518 #endif
nuclear@14 519
nuclear@14 520 #if defined(PNG_pHYs_SUPPORTED)
nuclear@14 521 void PNGAPI
nuclear@14 522 png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
nuclear@14 523 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
nuclear@14 524 {
nuclear@14 525 png_debug1(1, "in %s storage function\n", "pHYs");
nuclear@14 526 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 527 return;
nuclear@14 528
nuclear@14 529 info_ptr->x_pixels_per_unit = res_x;
nuclear@14 530 info_ptr->y_pixels_per_unit = res_y;
nuclear@14 531 info_ptr->phys_unit_type = (png_byte)unit_type;
nuclear@14 532 info_ptr->valid |= PNG_INFO_pHYs;
nuclear@14 533 }
nuclear@14 534 #endif
nuclear@14 535
nuclear@14 536 void PNGAPI
nuclear@14 537 png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
nuclear@14 538 png_colorp palette, int num_palette)
nuclear@14 539 {
nuclear@14 540
nuclear@14 541 png_debug1(1, "in %s storage function\n", "PLTE");
nuclear@14 542 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 543 return;
nuclear@14 544
nuclear@14 545 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
nuclear@14 546 {
nuclear@14 547 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
nuclear@14 548 png_error(png_ptr, "Invalid palette length");
nuclear@14 549 else
nuclear@14 550 {
nuclear@14 551 png_warning(png_ptr, "Invalid palette length");
nuclear@14 552 return;
nuclear@14 553 }
nuclear@14 554 }
nuclear@14 555
nuclear@14 556 /*
nuclear@14 557 * It may not actually be necessary to set png_ptr->palette here;
nuclear@14 558 * we do it for backward compatibility with the way the png_handle_tRNS
nuclear@14 559 * function used to do the allocation.
nuclear@14 560 */
nuclear@14 561 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 562 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
nuclear@14 563 #endif
nuclear@14 564
nuclear@14 565 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
nuclear@14 566 of num_palette entries,
nuclear@14 567 in case of an invalid PNG file that has too-large sample values. */
nuclear@14 568 png_ptr->palette = (png_colorp)png_malloc(png_ptr,
nuclear@14 569 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
nuclear@14 570 png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
nuclear@14 571 png_sizeof(png_color));
nuclear@14 572 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
nuclear@14 573 info_ptr->palette = png_ptr->palette;
nuclear@14 574 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
nuclear@14 575
nuclear@14 576 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 577 info_ptr->free_me |= PNG_FREE_PLTE;
nuclear@14 578 #else
nuclear@14 579 png_ptr->flags |= PNG_FLAG_FREE_PLTE;
nuclear@14 580 #endif
nuclear@14 581
nuclear@14 582 info_ptr->valid |= PNG_INFO_PLTE;
nuclear@14 583 }
nuclear@14 584
nuclear@14 585 #if defined(PNG_sBIT_SUPPORTED)
nuclear@14 586 void PNGAPI
nuclear@14 587 png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
nuclear@14 588 png_color_8p sig_bit)
nuclear@14 589 {
nuclear@14 590 png_debug1(1, "in %s storage function\n", "sBIT");
nuclear@14 591 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 592 return;
nuclear@14 593
nuclear@14 594 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
nuclear@14 595 info_ptr->valid |= PNG_INFO_sBIT;
nuclear@14 596 }
nuclear@14 597 #endif
nuclear@14 598
nuclear@14 599 #if defined(PNG_sRGB_SUPPORTED)
nuclear@14 600 void PNGAPI
nuclear@14 601 png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
nuclear@14 602 {
nuclear@14 603 png_debug1(1, "in %s storage function\n", "sRGB");
nuclear@14 604 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 605 return;
nuclear@14 606
nuclear@14 607 info_ptr->srgb_intent = (png_byte)intent;
nuclear@14 608 info_ptr->valid |= PNG_INFO_sRGB;
nuclear@14 609 }
nuclear@14 610
nuclear@14 611 void PNGAPI
nuclear@14 612 png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
nuclear@14 613 int intent)
nuclear@14 614 {
nuclear@14 615 #if defined(PNG_gAMA_SUPPORTED)
nuclear@14 616 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 617 float file_gamma;
nuclear@14 618 #endif
nuclear@14 619 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 620 png_fixed_point int_file_gamma;
nuclear@14 621 #endif
nuclear@14 622 #endif
nuclear@14 623 #if defined(PNG_cHRM_SUPPORTED)
nuclear@14 624 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 625 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
nuclear@14 626 #endif
nuclear@14 627 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 628 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
nuclear@14 629 int_green_y, int_blue_x, int_blue_y;
nuclear@14 630 #endif
nuclear@14 631 #endif
nuclear@14 632 png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
nuclear@14 633 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 634 return;
nuclear@14 635
nuclear@14 636 png_set_sRGB(png_ptr, info_ptr, intent);
nuclear@14 637
nuclear@14 638 #if defined(PNG_gAMA_SUPPORTED)
nuclear@14 639 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 640 file_gamma = (float).45455;
nuclear@14 641 png_set_gAMA(png_ptr, info_ptr, file_gamma);
nuclear@14 642 #endif
nuclear@14 643 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 644 int_file_gamma = 45455L;
nuclear@14 645 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
nuclear@14 646 #endif
nuclear@14 647 #endif
nuclear@14 648
nuclear@14 649 #if defined(PNG_cHRM_SUPPORTED)
nuclear@14 650 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@14 651 int_white_x = 31270L;
nuclear@14 652 int_white_y = 32900L;
nuclear@14 653 int_red_x = 64000L;
nuclear@14 654 int_red_y = 33000L;
nuclear@14 655 int_green_x = 30000L;
nuclear@14 656 int_green_y = 60000L;
nuclear@14 657 int_blue_x = 15000L;
nuclear@14 658 int_blue_y = 6000L;
nuclear@14 659
nuclear@14 660 png_set_cHRM_fixed(png_ptr, info_ptr,
nuclear@14 661 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
nuclear@14 662 int_blue_x, int_blue_y);
nuclear@14 663 #endif
nuclear@14 664 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@14 665 white_x = (float).3127;
nuclear@14 666 white_y = (float).3290;
nuclear@14 667 red_x = (float).64;
nuclear@14 668 red_y = (float).33;
nuclear@14 669 green_x = (float).30;
nuclear@14 670 green_y = (float).60;
nuclear@14 671 blue_x = (float).15;
nuclear@14 672 blue_y = (float).06;
nuclear@14 673
nuclear@14 674 png_set_cHRM(png_ptr, info_ptr,
nuclear@14 675 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
nuclear@14 676 #endif
nuclear@14 677 #endif
nuclear@14 678 }
nuclear@14 679 #endif
nuclear@14 680
nuclear@14 681
nuclear@14 682 #if defined(PNG_iCCP_SUPPORTED)
nuclear@14 683 void PNGAPI
nuclear@14 684 png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
nuclear@14 685 png_charp name, int compression_type,
nuclear@14 686 png_charp profile, png_uint_32 proflen)
nuclear@14 687 {
nuclear@14 688 png_charp new_iccp_name;
nuclear@14 689 png_charp new_iccp_profile;
nuclear@14 690 png_uint_32 length;
nuclear@14 691
nuclear@14 692 png_debug1(1, "in %s storage function\n", "iCCP");
nuclear@14 693 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
nuclear@14 694 return;
nuclear@14 695
nuclear@14 696 length = png_strlen(name)+1;
nuclear@14 697 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@14 698 if (new_iccp_name == NULL)
nuclear@14 699 {
nuclear@14 700 png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
nuclear@14 701 return;
nuclear@14 702 }
nuclear@14 703 png_memcpy(new_iccp_name, name, length);
nuclear@14 704 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
nuclear@14 705 if (new_iccp_profile == NULL)
nuclear@14 706 {
nuclear@14 707 png_free (png_ptr, new_iccp_name);
nuclear@14 708 png_warning(png_ptr,
nuclear@14 709 "Insufficient memory to process iCCP profile.");
nuclear@14 710 return;
nuclear@14 711 }
nuclear@14 712 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
nuclear@14 713
nuclear@14 714 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
nuclear@14 715
nuclear@14 716 info_ptr->iccp_proflen = proflen;
nuclear@14 717 info_ptr->iccp_name = new_iccp_name;
nuclear@14 718 info_ptr->iccp_profile = new_iccp_profile;
nuclear@14 719 /* Compression is always zero but is here so the API and info structure
nuclear@14 720 * does not have to change if we introduce multiple compression types */
nuclear@14 721 info_ptr->iccp_compression = (png_byte)compression_type;
nuclear@14 722 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 723 info_ptr->free_me |= PNG_FREE_ICCP;
nuclear@14 724 #endif
nuclear@14 725 info_ptr->valid |= PNG_INFO_iCCP;
nuclear@14 726 }
nuclear@14 727 #endif
nuclear@14 728
nuclear@14 729 #if defined(PNG_TEXT_SUPPORTED)
nuclear@14 730 void PNGAPI
nuclear@14 731 png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
nuclear@14 732 int num_text)
nuclear@14 733 {
nuclear@14 734 int ret;
nuclear@14 735 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
nuclear@14 736 if (ret)
nuclear@14 737 png_error(png_ptr, "Insufficient memory to store text");
nuclear@14 738 }
nuclear@14 739
nuclear@14 740 int /* PRIVATE */
nuclear@14 741 png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
nuclear@14 742 int num_text)
nuclear@14 743 {
nuclear@14 744 int i;
nuclear@14 745
nuclear@14 746 png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
nuclear@14 747 "text" : (png_const_charp)png_ptr->chunk_name));
nuclear@14 748
nuclear@14 749 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
nuclear@14 750 return(0);
nuclear@14 751
nuclear@14 752 /* Make sure we have enough space in the "text" array in info_struct
nuclear@14 753 * to hold all of the incoming text_ptr objects.
nuclear@14 754 */
nuclear@14 755 if (info_ptr->num_text + num_text > info_ptr->max_text)
nuclear@14 756 {
nuclear@14 757 if (info_ptr->text != NULL)
nuclear@14 758 {
nuclear@14 759 png_textp old_text;
nuclear@14 760 int old_max;
nuclear@14 761
nuclear@14 762 old_max = info_ptr->max_text;
nuclear@14 763 info_ptr->max_text = info_ptr->num_text + num_text + 8;
nuclear@14 764 old_text = info_ptr->text;
nuclear@14 765 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
nuclear@14 766 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
nuclear@14 767 if (info_ptr->text == NULL)
nuclear@14 768 {
nuclear@14 769 png_free(png_ptr, old_text);
nuclear@14 770 return(1);
nuclear@14 771 }
nuclear@14 772 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
nuclear@14 773 png_sizeof(png_text)));
nuclear@14 774 png_free(png_ptr, old_text);
nuclear@14 775 }
nuclear@14 776 else
nuclear@14 777 {
nuclear@14 778 info_ptr->max_text = num_text + 8;
nuclear@14 779 info_ptr->num_text = 0;
nuclear@14 780 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
nuclear@14 781 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
nuclear@14 782 if (info_ptr->text == NULL)
nuclear@14 783 return(1);
nuclear@14 784 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 785 info_ptr->free_me |= PNG_FREE_TEXT;
nuclear@14 786 #endif
nuclear@14 787 }
nuclear@14 788 png_debug1(3, "allocated %d entries for info_ptr->text\n",
nuclear@14 789 info_ptr->max_text);
nuclear@14 790 }
nuclear@14 791 for (i = 0; i < num_text; i++)
nuclear@14 792 {
nuclear@14 793 png_size_t text_length, key_len;
nuclear@14 794 png_size_t lang_len, lang_key_len;
nuclear@14 795 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
nuclear@14 796
nuclear@14 797 if (text_ptr[i].key == NULL)
nuclear@14 798 continue;
nuclear@14 799
nuclear@14 800 key_len = png_strlen(text_ptr[i].key);
nuclear@14 801
nuclear@14 802 if (text_ptr[i].compression <= 0)
nuclear@14 803 {
nuclear@14 804 lang_len = 0;
nuclear@14 805 lang_key_len = 0;
nuclear@14 806 }
nuclear@14 807 else
nuclear@14 808 #ifdef PNG_iTXt_SUPPORTED
nuclear@14 809 {
nuclear@14 810 /* set iTXt data */
nuclear@14 811 if (text_ptr[i].lang != NULL)
nuclear@14 812 lang_len = png_strlen(text_ptr[i].lang);
nuclear@14 813 else
nuclear@14 814 lang_len = 0;
nuclear@14 815 if (text_ptr[i].lang_key != NULL)
nuclear@14 816 lang_key_len = png_strlen(text_ptr[i].lang_key);
nuclear@14 817 else
nuclear@14 818 lang_key_len = 0;
nuclear@14 819 }
nuclear@14 820 #else
nuclear@14 821 {
nuclear@14 822 png_warning(png_ptr, "iTXt chunk not supported.");
nuclear@14 823 continue;
nuclear@14 824 }
nuclear@14 825 #endif
nuclear@14 826
nuclear@14 827 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
nuclear@14 828 {
nuclear@14 829 text_length = 0;
nuclear@14 830 #ifdef PNG_iTXt_SUPPORTED
nuclear@14 831 if (text_ptr[i].compression > 0)
nuclear@14 832 textp->compression = PNG_ITXT_COMPRESSION_NONE;
nuclear@14 833 else
nuclear@14 834 #endif
nuclear@14 835 textp->compression = PNG_TEXT_COMPRESSION_NONE;
nuclear@14 836 }
nuclear@14 837 else
nuclear@14 838 {
nuclear@14 839 text_length = png_strlen(text_ptr[i].text);
nuclear@14 840 textp->compression = text_ptr[i].compression;
nuclear@14 841 }
nuclear@14 842
nuclear@14 843 textp->key = (png_charp)png_malloc_warn(png_ptr,
nuclear@14 844 (png_uint_32)
nuclear@14 845 (key_len + text_length + lang_len + lang_key_len + 4));
nuclear@14 846 if (textp->key == NULL)
nuclear@14 847 return(1);
nuclear@14 848 png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
nuclear@14 849 (png_uint_32)
nuclear@14 850 (key_len + lang_len + lang_key_len + text_length + 4),
nuclear@14 851 (int)textp->key);
nuclear@14 852
nuclear@14 853 png_memcpy(textp->key, text_ptr[i].key,
nuclear@14 854 (png_size_t)(key_len));
nuclear@14 855 *(textp->key + key_len) = '\0';
nuclear@14 856 #ifdef PNG_iTXt_SUPPORTED
nuclear@14 857 if (text_ptr[i].compression > 0)
nuclear@14 858 {
nuclear@14 859 textp->lang = textp->key + key_len + 1;
nuclear@14 860 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
nuclear@14 861 *(textp->lang + lang_len) = '\0';
nuclear@14 862 textp->lang_key = textp->lang + lang_len + 1;
nuclear@14 863 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
nuclear@14 864 *(textp->lang_key + lang_key_len) = '\0';
nuclear@14 865 textp->text = textp->lang_key + lang_key_len + 1;
nuclear@14 866 }
nuclear@14 867 else
nuclear@14 868 #endif
nuclear@14 869 {
nuclear@14 870 #ifdef PNG_iTXt_SUPPORTED
nuclear@14 871 textp->lang=NULL;
nuclear@14 872 textp->lang_key=NULL;
nuclear@14 873 #endif
nuclear@14 874 textp->text = textp->key + key_len + 1;
nuclear@14 875 }
nuclear@14 876 if (text_length)
nuclear@14 877 png_memcpy(textp->text, text_ptr[i].text,
nuclear@14 878 (png_size_t)(text_length));
nuclear@14 879 *(textp->text + text_length) = '\0';
nuclear@14 880
nuclear@14 881 #ifdef PNG_iTXt_SUPPORTED
nuclear@14 882 if (textp->compression > 0)
nuclear@14 883 {
nuclear@14 884 textp->text_length = 0;
nuclear@14 885 textp->itxt_length = text_length;
nuclear@14 886 }
nuclear@14 887 else
nuclear@14 888 #endif
nuclear@14 889 {
nuclear@14 890 textp->text_length = text_length;
nuclear@14 891 #ifdef PNG_iTXt_SUPPORTED
nuclear@14 892 textp->itxt_length = 0;
nuclear@14 893 #endif
nuclear@14 894 }
nuclear@14 895 info_ptr->num_text++;
nuclear@14 896 png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
nuclear@14 897 }
nuclear@14 898 return(0);
nuclear@14 899 }
nuclear@14 900 #endif
nuclear@14 901
nuclear@14 902 #if defined(PNG_tIME_SUPPORTED)
nuclear@14 903 void PNGAPI
nuclear@14 904 png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
nuclear@14 905 {
nuclear@14 906 png_debug1(1, "in %s storage function\n", "tIME");
nuclear@14 907 if (png_ptr == NULL || info_ptr == NULL ||
nuclear@14 908 (png_ptr->mode & PNG_WROTE_tIME))
nuclear@14 909 return;
nuclear@14 910
nuclear@14 911 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
nuclear@14 912 info_ptr->valid |= PNG_INFO_tIME;
nuclear@14 913 }
nuclear@14 914 #endif
nuclear@14 915
nuclear@14 916 #if defined(PNG_tRNS_SUPPORTED)
nuclear@14 917 void PNGAPI
nuclear@14 918 png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
nuclear@14 919 png_bytep trans, int num_trans, png_color_16p trans_values)
nuclear@14 920 {
nuclear@14 921 png_debug1(1, "in %s storage function\n", "tRNS");
nuclear@14 922 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 923 return;
nuclear@14 924
nuclear@14 925 if (trans != NULL)
nuclear@14 926 {
nuclear@14 927 /*
nuclear@14 928 * It may not actually be necessary to set png_ptr->trans here;
nuclear@14 929 * we do it for backward compatibility with the way the png_handle_tRNS
nuclear@14 930 * function used to do the allocation.
nuclear@14 931 */
nuclear@14 932
nuclear@14 933 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 934 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
nuclear@14 935 #endif
nuclear@14 936
nuclear@14 937 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
nuclear@14 938 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
nuclear@14 939 (png_uint_32)PNG_MAX_PALETTE_LENGTH);
nuclear@14 940 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
nuclear@14 941 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
nuclear@14 942 }
nuclear@14 943
nuclear@14 944 if (trans_values != NULL)
nuclear@14 945 {
nuclear@14 946 int sample_max = (1 << info_ptr->bit_depth);
nuclear@14 947 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
nuclear@14 948 (int)trans_values->gray > sample_max) ||
nuclear@14 949 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
nuclear@14 950 ((int)trans_values->red > sample_max ||
nuclear@14 951 (int)trans_values->green > sample_max ||
nuclear@14 952 (int)trans_values->blue > sample_max)))
nuclear@14 953 png_warning(png_ptr,
nuclear@14 954 "tRNS chunk has out-of-range samples for bit_depth");
nuclear@14 955 png_memcpy(&(info_ptr->trans_values), trans_values,
nuclear@14 956 png_sizeof(png_color_16));
nuclear@14 957 if (num_trans == 0)
nuclear@14 958 num_trans = 1;
nuclear@14 959 }
nuclear@14 960
nuclear@14 961 info_ptr->num_trans = (png_uint_16)num_trans;
nuclear@14 962 if (num_trans != 0)
nuclear@14 963 {
nuclear@14 964 info_ptr->valid |= PNG_INFO_tRNS;
nuclear@14 965 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 966 info_ptr->free_me |= PNG_FREE_TRNS;
nuclear@14 967 #else
nuclear@14 968 png_ptr->flags |= PNG_FLAG_FREE_TRNS;
nuclear@14 969 #endif
nuclear@14 970 }
nuclear@14 971 }
nuclear@14 972 #endif
nuclear@14 973
nuclear@14 974 #if defined(PNG_sPLT_SUPPORTED)
nuclear@14 975 void PNGAPI
nuclear@14 976 png_set_sPLT(png_structp png_ptr,
nuclear@14 977 png_infop info_ptr, png_sPLT_tp entries, int nentries)
nuclear@14 978 /*
nuclear@14 979 * entries - array of png_sPLT_t structures
nuclear@14 980 * to be added to the list of palettes
nuclear@14 981 * in the info structure.
nuclear@14 982 * nentries - number of palette structures to be
nuclear@14 983 * added.
nuclear@14 984 */
nuclear@14 985 {
nuclear@14 986 png_sPLT_tp np;
nuclear@14 987 int i;
nuclear@14 988
nuclear@14 989 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 990 return;
nuclear@14 991
nuclear@14 992 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
nuclear@14 993 (info_ptr->splt_palettes_num + nentries) *
nuclear@14 994 (png_uint_32)png_sizeof(png_sPLT_t));
nuclear@14 995 if (np == NULL)
nuclear@14 996 {
nuclear@14 997 png_warning(png_ptr, "No memory for sPLT palettes.");
nuclear@14 998 return;
nuclear@14 999 }
nuclear@14 1000
nuclear@14 1001 png_memcpy(np, info_ptr->splt_palettes,
nuclear@14 1002 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
nuclear@14 1003 png_free(png_ptr, info_ptr->splt_palettes);
nuclear@14 1004 info_ptr->splt_palettes=NULL;
nuclear@14 1005
nuclear@14 1006 for (i = 0; i < nentries; i++)
nuclear@14 1007 {
nuclear@14 1008 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
nuclear@14 1009 png_sPLT_tp from = entries + i;
nuclear@14 1010 png_uint_32 length;
nuclear@14 1011
nuclear@14 1012 length = png_strlen(from->name) + 1;
nuclear@14 1013 to->name = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@14 1014 if (to->name == NULL)
nuclear@14 1015 {
nuclear@14 1016 png_warning(png_ptr,
nuclear@14 1017 "Out of memory while processing sPLT chunk");
nuclear@14 1018 continue;
nuclear@14 1019 }
nuclear@14 1020 png_memcpy(to->name, from->name, length);
nuclear@14 1021 to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
nuclear@14 1022 (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
nuclear@14 1023 if (to->entries == NULL)
nuclear@14 1024 {
nuclear@14 1025 png_warning(png_ptr,
nuclear@14 1026 "Out of memory while processing sPLT chunk");
nuclear@14 1027 png_free(png_ptr, to->name);
nuclear@14 1028 to->name = NULL;
nuclear@14 1029 continue;
nuclear@14 1030 }
nuclear@14 1031 png_memcpy(to->entries, from->entries,
nuclear@14 1032 from->nentries * png_sizeof(png_sPLT_entry));
nuclear@14 1033 to->nentries = from->nentries;
nuclear@14 1034 to->depth = from->depth;
nuclear@14 1035 }
nuclear@14 1036
nuclear@14 1037 info_ptr->splt_palettes = np;
nuclear@14 1038 info_ptr->splt_palettes_num += nentries;
nuclear@14 1039 info_ptr->valid |= PNG_INFO_sPLT;
nuclear@14 1040 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 1041 info_ptr->free_me |= PNG_FREE_SPLT;
nuclear@14 1042 #endif
nuclear@14 1043 }
nuclear@14 1044 #endif /* PNG_sPLT_SUPPORTED */
nuclear@14 1045
nuclear@14 1046 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
nuclear@14 1047 void PNGAPI
nuclear@14 1048 png_set_unknown_chunks(png_structp png_ptr,
nuclear@14 1049 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
nuclear@14 1050 {
nuclear@14 1051 png_unknown_chunkp np;
nuclear@14 1052 int i;
nuclear@14 1053
nuclear@14 1054 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
nuclear@14 1055 return;
nuclear@14 1056
nuclear@14 1057 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
nuclear@14 1058 (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
nuclear@14 1059 png_sizeof(png_unknown_chunk)));
nuclear@14 1060 if (np == NULL)
nuclear@14 1061 {
nuclear@14 1062 png_warning(png_ptr,
nuclear@14 1063 "Out of memory while processing unknown chunk.");
nuclear@14 1064 return;
nuclear@14 1065 }
nuclear@14 1066
nuclear@14 1067 png_memcpy(np, info_ptr->unknown_chunks,
nuclear@14 1068 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
nuclear@14 1069 png_free(png_ptr, info_ptr->unknown_chunks);
nuclear@14 1070 info_ptr->unknown_chunks=NULL;
nuclear@14 1071
nuclear@14 1072 for (i = 0; i < num_unknowns; i++)
nuclear@14 1073 {
nuclear@14 1074 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
nuclear@14 1075 png_unknown_chunkp from = unknowns + i;
nuclear@14 1076
nuclear@14 1077 png_memcpy((png_charp)to->name,
nuclear@14 1078 (png_charp)from->name,
nuclear@14 1079 png_sizeof(from->name));
nuclear@14 1080 to->name[png_sizeof(to->name)-1] = '\0';
nuclear@14 1081 to->size = from->size;
nuclear@14 1082 /* note our location in the read or write sequence */
nuclear@14 1083 to->location = (png_byte)(png_ptr->mode & 0xff);
nuclear@14 1084
nuclear@14 1085 if (from->size == 0)
nuclear@14 1086 to->data=NULL;
nuclear@14 1087 else
nuclear@14 1088 {
nuclear@14 1089 to->data = (png_bytep)png_malloc_warn(png_ptr,
nuclear@14 1090 (png_uint_32)from->size);
nuclear@14 1091 if (to->data == NULL)
nuclear@14 1092 {
nuclear@14 1093 png_warning(png_ptr,
nuclear@14 1094 "Out of memory while processing unknown chunk.");
nuclear@14 1095 to->size = 0;
nuclear@14 1096 }
nuclear@14 1097 else
nuclear@14 1098 png_memcpy(to->data, from->data, from->size);
nuclear@14 1099 }
nuclear@14 1100 }
nuclear@14 1101
nuclear@14 1102 info_ptr->unknown_chunks = np;
nuclear@14 1103 info_ptr->unknown_chunks_num += num_unknowns;
nuclear@14 1104 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 1105 info_ptr->free_me |= PNG_FREE_UNKN;
nuclear@14 1106 #endif
nuclear@14 1107 }
nuclear@14 1108 void PNGAPI
nuclear@14 1109 png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
nuclear@14 1110 int chunk, int location)
nuclear@14 1111 {
nuclear@14 1112 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
nuclear@14 1113 (int)info_ptr->unknown_chunks_num)
nuclear@14 1114 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
nuclear@14 1115 }
nuclear@14 1116 #endif
nuclear@14 1117
nuclear@14 1118 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
nuclear@14 1119 #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
nuclear@14 1120 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
nuclear@14 1121 void PNGAPI
nuclear@14 1122 png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
nuclear@14 1123 {
nuclear@14 1124 /* This function is deprecated in favor of png_permit_mng_features()
nuclear@14 1125 and will be removed from libpng-1.3.0 */
nuclear@14 1126 png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
nuclear@14 1127 if (png_ptr == NULL)
nuclear@14 1128 return;
nuclear@14 1129 png_ptr->mng_features_permitted = (png_byte)
nuclear@14 1130 ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
nuclear@14 1131 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
nuclear@14 1132 }
nuclear@14 1133 #endif
nuclear@14 1134 #endif
nuclear@14 1135
nuclear@14 1136 #if defined(PNG_MNG_FEATURES_SUPPORTED)
nuclear@14 1137 png_uint_32 PNGAPI
nuclear@14 1138 png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
nuclear@14 1139 {
nuclear@14 1140 png_debug(1, "in png_permit_mng_features\n");
nuclear@14 1141 if (png_ptr == NULL)
nuclear@14 1142 return (png_uint_32)0;
nuclear@14 1143 png_ptr->mng_features_permitted =
nuclear@14 1144 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
nuclear@14 1145 return (png_uint_32)png_ptr->mng_features_permitted;
nuclear@14 1146 }
nuclear@14 1147 #endif
nuclear@14 1148
nuclear@14 1149 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
nuclear@14 1150 void PNGAPI
nuclear@14 1151 png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
nuclear@14 1152 chunk_list, int num_chunks)
nuclear@14 1153 {
nuclear@14 1154 png_bytep new_list, p;
nuclear@14 1155 int i, old_num_chunks;
nuclear@14 1156 if (png_ptr == NULL)
nuclear@14 1157 return;
nuclear@14 1158 if (num_chunks == 0)
nuclear@14 1159 {
nuclear@14 1160 if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
nuclear@14 1161 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
nuclear@14 1162 else
nuclear@14 1163 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
nuclear@14 1164
nuclear@14 1165 if (keep == PNG_HANDLE_CHUNK_ALWAYS)
nuclear@14 1166 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
nuclear@14 1167 else
nuclear@14 1168 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
nuclear@14 1169 return;
nuclear@14 1170 }
nuclear@14 1171 if (chunk_list == NULL)
nuclear@14 1172 return;
nuclear@14 1173 old_num_chunks = png_ptr->num_chunk_list;
nuclear@14 1174 new_list=(png_bytep)png_malloc(png_ptr,
nuclear@14 1175 (png_uint_32)
nuclear@14 1176 (5*(num_chunks + old_num_chunks)));
nuclear@14 1177 if (png_ptr->chunk_list != NULL)
nuclear@14 1178 {
nuclear@14 1179 png_memcpy(new_list, png_ptr->chunk_list,
nuclear@14 1180 (png_size_t)(5*old_num_chunks));
nuclear@14 1181 png_free(png_ptr, png_ptr->chunk_list);
nuclear@14 1182 png_ptr->chunk_list=NULL;
nuclear@14 1183 }
nuclear@14 1184 png_memcpy(new_list + 5*old_num_chunks, chunk_list,
nuclear@14 1185 (png_size_t)(5*num_chunks));
nuclear@14 1186 for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
nuclear@14 1187 *p=(png_byte)keep;
nuclear@14 1188 png_ptr->num_chunk_list = old_num_chunks + num_chunks;
nuclear@14 1189 png_ptr->chunk_list = new_list;
nuclear@14 1190 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@14 1191 png_ptr->free_me |= PNG_FREE_LIST;
nuclear@14 1192 #endif
nuclear@14 1193 }
nuclear@14 1194 #endif
nuclear@14 1195
nuclear@14 1196 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
nuclear@14 1197 void PNGAPI
nuclear@14 1198 png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
nuclear@14 1199 png_user_chunk_ptr read_user_chunk_fn)
nuclear@14 1200 {
nuclear@14 1201 png_debug(1, "in png_set_read_user_chunk_fn\n");
nuclear@14 1202 if (png_ptr == NULL)
nuclear@14 1203 return;
nuclear@14 1204 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
nuclear@14 1205 png_ptr->user_chunk_ptr = user_chunk_ptr;
nuclear@14 1206 }
nuclear@14 1207 #endif
nuclear@14 1208
nuclear@14 1209 #if defined(PNG_INFO_IMAGE_SUPPORTED)
nuclear@14 1210 void PNGAPI
nuclear@14 1211 png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
nuclear@14 1212 {
nuclear@14 1213 png_debug1(1, "in %s storage function\n", "rows");
nuclear@14 1214
nuclear@14 1215 if (png_ptr == NULL || info_ptr == NULL)
nuclear@14 1216 return;
nuclear@14 1217
nuclear@14 1218 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
nuclear@14 1219 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
nuclear@14 1220 info_ptr->row_pointers = row_pointers;
nuclear@14 1221 if (row_pointers)
nuclear@14 1222 info_ptr->valid |= PNG_INFO_IDAT;
nuclear@14 1223 }
nuclear@14 1224 #endif
nuclear@14 1225
nuclear@14 1226 #ifdef PNG_WRITE_SUPPORTED
nuclear@14 1227 void PNGAPI
nuclear@14 1228 png_set_compression_buffer_size(png_structp png_ptr,
nuclear@14 1229 png_uint_32 size)
nuclear@14 1230 {
nuclear@14 1231 if (png_ptr == NULL)
nuclear@14 1232 return;
nuclear@14 1233 png_free(png_ptr, png_ptr->zbuf);
nuclear@14 1234 png_ptr->zbuf_size = (png_size_t)size;
nuclear@14 1235 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
nuclear@14 1236 png_ptr->zstream.next_out = png_ptr->zbuf;
nuclear@14 1237 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
nuclear@14 1238 }
nuclear@14 1239 #endif
nuclear@14 1240
nuclear@14 1241 void PNGAPI
nuclear@14 1242 png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
nuclear@14 1243 {
nuclear@14 1244 if (png_ptr && info_ptr)
nuclear@14 1245 info_ptr->valid &= ~mask;
nuclear@14 1246 }
nuclear@14 1247
nuclear@14 1248
nuclear@14 1249 #ifndef PNG_1_0_X
nuclear@14 1250 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
nuclear@14 1251 /* function was added to libpng 1.2.0 and should always exist by default */
nuclear@14 1252 void PNGAPI
nuclear@14 1253 png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
nuclear@14 1254 {
nuclear@14 1255 /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
nuclear@14 1256 if (png_ptr != NULL)
nuclear@14 1257 png_ptr->asm_flags = 0;
nuclear@14 1258 asm_flags = asm_flags; /* Quiet the compiler */
nuclear@14 1259 }
nuclear@14 1260
nuclear@14 1261 /* this function was added to libpng 1.2.0 */
nuclear@14 1262 void PNGAPI
nuclear@14 1263 png_set_mmx_thresholds (png_structp png_ptr,
nuclear@14 1264 png_byte mmx_bitdepth_threshold,
nuclear@14 1265 png_uint_32 mmx_rowbytes_threshold)
nuclear@14 1266 {
nuclear@14 1267 /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
nuclear@14 1268 if (png_ptr == NULL)
nuclear@14 1269 return;
nuclear@14 1270 /* Quiet the compiler */
nuclear@14 1271 mmx_bitdepth_threshold = mmx_bitdepth_threshold;
nuclear@14 1272 mmx_rowbytes_threshold = mmx_rowbytes_threshold;
nuclear@14 1273 }
nuclear@14 1274 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
nuclear@14 1275
nuclear@14 1276 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
nuclear@14 1277 /* this function was added to libpng 1.2.6 */
nuclear@14 1278 void PNGAPI
nuclear@14 1279 png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
nuclear@14 1280 png_uint_32 user_height_max)
nuclear@14 1281 {
nuclear@14 1282 /* Images with dimensions larger than these limits will be
nuclear@14 1283 * rejected by png_set_IHDR(). To accept any PNG datastream
nuclear@14 1284 * regardless of dimensions, set both limits to 0x7ffffffL.
nuclear@14 1285 */
nuclear@14 1286 if (png_ptr == NULL) return;
nuclear@14 1287 png_ptr->user_width_max = user_width_max;
nuclear@14 1288 png_ptr->user_height_max = user_height_max;
nuclear@14 1289 }
nuclear@14 1290 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
nuclear@14 1291
nuclear@14 1292 #endif /* ?PNG_1_0_X */
nuclear@14 1293 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */