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annotate libs/libpng/pngset.c @ 26:862a3329a8f0

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wohooo, added a shitload of code from zlib/libpng/libjpeg. When the good lord was raining shared libraries the iphone held a fucking umbrella...
author John Tsiombikas <nuclear@mutantstargoat.com>
date Thu, 08 Sep 2011 06:28:38 +0300
parents
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rev   line source
nuclear@26 1
nuclear@26 2 /* pngset.c - storage of image information into info struct
nuclear@26 3 *
nuclear@26 4 * Last changed in libpng 1.2.30 [August 15, 2008]
nuclear@26 5 * For conditions of distribution and use, see copyright notice in png.h
nuclear@26 6 * Copyright (c) 1998-2008 Glenn Randers-Pehrson
nuclear@26 7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
nuclear@26 8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
nuclear@26 9 *
nuclear@26 10 * The functions here are used during reads to store data from the file
nuclear@26 11 * into the info struct, and during writes to store application data
nuclear@26 12 * into the info struct for writing into the file. This abstracts the
nuclear@26 13 * info struct and allows us to change the structure in the future.
nuclear@26 14 */
nuclear@26 15
nuclear@26 16 #define PNG_INTERNAL
nuclear@26 17 #include "png.h"
nuclear@26 18 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
nuclear@26 19
nuclear@26 20 #if defined(PNG_bKGD_SUPPORTED)
nuclear@26 21 void PNGAPI
nuclear@26 22 png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
nuclear@26 23 {
nuclear@26 24 png_debug1(1, "in %s storage function\n", "bKGD");
nuclear@26 25 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 26 return;
nuclear@26 27
nuclear@26 28 png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
nuclear@26 29 info_ptr->valid |= PNG_INFO_bKGD;
nuclear@26 30 }
nuclear@26 31 #endif
nuclear@26 32
nuclear@26 33 #if defined(PNG_cHRM_SUPPORTED)
nuclear@26 34 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 35 void PNGAPI
nuclear@26 36 png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
nuclear@26 37 double white_x, double white_y, double red_x, double red_y,
nuclear@26 38 double green_x, double green_y, double blue_x, double blue_y)
nuclear@26 39 {
nuclear@26 40 png_debug1(1, "in %s storage function\n", "cHRM");
nuclear@26 41 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 42 return;
nuclear@26 43 if (!(white_x || white_y || red_x || red_y || green_x || green_y ||
nuclear@26 44 blue_x || blue_y))
nuclear@26 45 {
nuclear@26 46 png_warning(png_ptr,
nuclear@26 47 "Ignoring attempt to set all-zero chromaticity values");
nuclear@26 48 return;
nuclear@26 49 }
nuclear@26 50 if (white_x < 0.0 || white_y < 0.0 ||
nuclear@26 51 red_x < 0.0 || red_y < 0.0 ||
nuclear@26 52 green_x < 0.0 || green_y < 0.0 ||
nuclear@26 53 blue_x < 0.0 || blue_y < 0.0)
nuclear@26 54 {
nuclear@26 55 png_warning(png_ptr,
nuclear@26 56 "Ignoring attempt to set negative chromaticity value");
nuclear@26 57 return;
nuclear@26 58 }
nuclear@26 59 if (white_x > 21474.83 || white_y > 21474.83 ||
nuclear@26 60 red_x > 21474.83 || red_y > 21474.83 ||
nuclear@26 61 green_x > 21474.83 || green_y > 21474.83 ||
nuclear@26 62 blue_x > 21474.83 || blue_y > 21474.83)
nuclear@26 63 {
nuclear@26 64 png_warning(png_ptr,
nuclear@26 65 "Ignoring attempt to set chromaticity value exceeding 21474.83");
nuclear@26 66 return;
nuclear@26 67 }
nuclear@26 68
nuclear@26 69 info_ptr->x_white = (float)white_x;
nuclear@26 70 info_ptr->y_white = (float)white_y;
nuclear@26 71 info_ptr->x_red = (float)red_x;
nuclear@26 72 info_ptr->y_red = (float)red_y;
nuclear@26 73 info_ptr->x_green = (float)green_x;
nuclear@26 74 info_ptr->y_green = (float)green_y;
nuclear@26 75 info_ptr->x_blue = (float)blue_x;
nuclear@26 76 info_ptr->y_blue = (float)blue_y;
nuclear@26 77 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 78 info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
nuclear@26 79 info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
nuclear@26 80 info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
nuclear@26 81 info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
nuclear@26 82 info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
nuclear@26 83 info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
nuclear@26 84 info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
nuclear@26 85 info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
nuclear@26 86 #endif
nuclear@26 87 info_ptr->valid |= PNG_INFO_cHRM;
nuclear@26 88 }
nuclear@26 89 #endif
nuclear@26 90 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 91 void PNGAPI
nuclear@26 92 png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
nuclear@26 93 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
nuclear@26 94 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
nuclear@26 95 png_fixed_point blue_x, png_fixed_point blue_y)
nuclear@26 96 {
nuclear@26 97 png_debug1(1, "in %s storage function\n", "cHRM");
nuclear@26 98 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 99 return;
nuclear@26 100
nuclear@26 101 if (!(white_x || white_y || red_x || red_y || green_x || green_y ||
nuclear@26 102 blue_x || blue_y))
nuclear@26 103 {
nuclear@26 104 png_warning(png_ptr,
nuclear@26 105 "Ignoring attempt to set all-zero chromaticity values");
nuclear@26 106 return;
nuclear@26 107 }
nuclear@26 108 if (white_x < 0 || white_y < 0 ||
nuclear@26 109 red_x < 0 || red_y < 0 ||
nuclear@26 110 green_x < 0 || green_y < 0 ||
nuclear@26 111 blue_x < 0 || blue_y < 0)
nuclear@26 112 {
nuclear@26 113 png_warning(png_ptr,
nuclear@26 114 "Ignoring attempt to set negative chromaticity value");
nuclear@26 115 return;
nuclear@26 116 }
nuclear@26 117 if (white_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@26 118 white_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@26 119 red_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@26 120 red_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@26 121 green_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@26 122 green_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@26 123 blue_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@26 124 blue_y > (png_fixed_point) PNG_UINT_31_MAX )
nuclear@26 125 {
nuclear@26 126 png_warning(png_ptr,
nuclear@26 127 "Ignoring attempt to set chromaticity value exceeding 21474.83");
nuclear@26 128 return;
nuclear@26 129 }
nuclear@26 130 info_ptr->int_x_white = white_x;
nuclear@26 131 info_ptr->int_y_white = white_y;
nuclear@26 132 info_ptr->int_x_red = red_x;
nuclear@26 133 info_ptr->int_y_red = red_y;
nuclear@26 134 info_ptr->int_x_green = green_x;
nuclear@26 135 info_ptr->int_y_green = green_y;
nuclear@26 136 info_ptr->int_x_blue = blue_x;
nuclear@26 137 info_ptr->int_y_blue = blue_y;
nuclear@26 138 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 139 info_ptr->x_white = (float)(white_x/100000.);
nuclear@26 140 info_ptr->y_white = (float)(white_y/100000.);
nuclear@26 141 info_ptr->x_red = (float)( red_x/100000.);
nuclear@26 142 info_ptr->y_red = (float)( red_y/100000.);
nuclear@26 143 info_ptr->x_green = (float)(green_x/100000.);
nuclear@26 144 info_ptr->y_green = (float)(green_y/100000.);
nuclear@26 145 info_ptr->x_blue = (float)( blue_x/100000.);
nuclear@26 146 info_ptr->y_blue = (float)( blue_y/100000.);
nuclear@26 147 #endif
nuclear@26 148 info_ptr->valid |= PNG_INFO_cHRM;
nuclear@26 149 }
nuclear@26 150 #endif
nuclear@26 151 #endif
nuclear@26 152
nuclear@26 153 #if defined(PNG_gAMA_SUPPORTED)
nuclear@26 154 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 155 void PNGAPI
nuclear@26 156 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
nuclear@26 157 {
nuclear@26 158 double gamma;
nuclear@26 159 png_debug1(1, "in %s storage function\n", "gAMA");
nuclear@26 160 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 161 return;
nuclear@26 162
nuclear@26 163 /* Check for overflow */
nuclear@26 164 if (file_gamma > 21474.83)
nuclear@26 165 {
nuclear@26 166 png_warning(png_ptr, "Limiting gamma to 21474.83");
nuclear@26 167 gamma=21474.83;
nuclear@26 168 }
nuclear@26 169 else
nuclear@26 170 gamma = file_gamma;
nuclear@26 171 info_ptr->gamma = (float)gamma;
nuclear@26 172 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 173 info_ptr->int_gamma = (int)(gamma*100000.+.5);
nuclear@26 174 #endif
nuclear@26 175 info_ptr->valid |= PNG_INFO_gAMA;
nuclear@26 176 if (gamma == 0.0)
nuclear@26 177 png_warning(png_ptr, "Setting gamma=0");
nuclear@26 178 }
nuclear@26 179 #endif
nuclear@26 180 void PNGAPI
nuclear@26 181 png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
nuclear@26 182 int_gamma)
nuclear@26 183 {
nuclear@26 184 png_fixed_point gamma;
nuclear@26 185
nuclear@26 186 png_debug1(1, "in %s storage function\n", "gAMA");
nuclear@26 187 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 188 return;
nuclear@26 189
nuclear@26 190 if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
nuclear@26 191 {
nuclear@26 192 png_warning(png_ptr, "Limiting gamma to 21474.83");
nuclear@26 193 gamma=PNG_UINT_31_MAX;
nuclear@26 194 }
nuclear@26 195 else
nuclear@26 196 {
nuclear@26 197 if (int_gamma < 0)
nuclear@26 198 {
nuclear@26 199 png_warning(png_ptr, "Setting negative gamma to zero");
nuclear@26 200 gamma = 0;
nuclear@26 201 }
nuclear@26 202 else
nuclear@26 203 gamma = int_gamma;
nuclear@26 204 }
nuclear@26 205 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 206 info_ptr->gamma = (float)(gamma/100000.);
nuclear@26 207 #endif
nuclear@26 208 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 209 info_ptr->int_gamma = gamma;
nuclear@26 210 #endif
nuclear@26 211 info_ptr->valid |= PNG_INFO_gAMA;
nuclear@26 212 if (gamma == 0)
nuclear@26 213 png_warning(png_ptr, "Setting gamma=0");
nuclear@26 214 }
nuclear@26 215 #endif
nuclear@26 216
nuclear@26 217 #if defined(PNG_hIST_SUPPORTED)
nuclear@26 218 void PNGAPI
nuclear@26 219 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
nuclear@26 220 {
nuclear@26 221 int i;
nuclear@26 222
nuclear@26 223 png_debug1(1, "in %s storage function\n", "hIST");
nuclear@26 224 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 225 return;
nuclear@26 226 if (info_ptr->num_palette == 0 || info_ptr->num_palette
nuclear@26 227 > PNG_MAX_PALETTE_LENGTH)
nuclear@26 228 {
nuclear@26 229 png_warning(png_ptr,
nuclear@26 230 "Invalid palette size, hIST allocation skipped.");
nuclear@26 231 return;
nuclear@26 232 }
nuclear@26 233
nuclear@26 234 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 235 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
nuclear@26 236 #endif
nuclear@26 237 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version
nuclear@26 238 1.2.1 */
nuclear@26 239 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
nuclear@26 240 (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
nuclear@26 241 if (png_ptr->hist == NULL)
nuclear@26 242 {
nuclear@26 243 png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
nuclear@26 244 return;
nuclear@26 245 }
nuclear@26 246
nuclear@26 247 for (i = 0; i < info_ptr->num_palette; i++)
nuclear@26 248 png_ptr->hist[i] = hist[i];
nuclear@26 249 info_ptr->hist = png_ptr->hist;
nuclear@26 250 info_ptr->valid |= PNG_INFO_hIST;
nuclear@26 251
nuclear@26 252 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 253 info_ptr->free_me |= PNG_FREE_HIST;
nuclear@26 254 #else
nuclear@26 255 png_ptr->flags |= PNG_FLAG_FREE_HIST;
nuclear@26 256 #endif
nuclear@26 257 }
nuclear@26 258 #endif
nuclear@26 259
nuclear@26 260 void PNGAPI
nuclear@26 261 png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
nuclear@26 262 png_uint_32 width, png_uint_32 height, int bit_depth,
nuclear@26 263 int color_type, int interlace_type, int compression_type,
nuclear@26 264 int filter_type)
nuclear@26 265 {
nuclear@26 266 png_debug1(1, "in %s storage function\n", "IHDR");
nuclear@26 267 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 268 return;
nuclear@26 269
nuclear@26 270 /* check for width and height valid values */
nuclear@26 271 if (width == 0 || height == 0)
nuclear@26 272 png_error(png_ptr, "Image width or height is zero in IHDR");
nuclear@26 273 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
nuclear@26 274 if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
nuclear@26 275 png_error(png_ptr, "image size exceeds user limits in IHDR");
nuclear@26 276 #else
nuclear@26 277 if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
nuclear@26 278 png_error(png_ptr, "image size exceeds user limits in IHDR");
nuclear@26 279 #endif
nuclear@26 280 if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
nuclear@26 281 png_error(png_ptr, "Invalid image size in IHDR");
nuclear@26 282 if ( width > (PNG_UINT_32_MAX
nuclear@26 283 >> 3) /* 8-byte RGBA pixels */
nuclear@26 284 - 64 /* bigrowbuf hack */
nuclear@26 285 - 1 /* filter byte */
nuclear@26 286 - 7*8 /* rounding of width to multiple of 8 pixels */
nuclear@26 287 - 8) /* extra max_pixel_depth pad */
nuclear@26 288 png_warning(png_ptr, "Width is too large for libpng to process pixels");
nuclear@26 289
nuclear@26 290 /* check other values */
nuclear@26 291 if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
nuclear@26 292 bit_depth != 8 && bit_depth != 16)
nuclear@26 293 png_error(png_ptr, "Invalid bit depth in IHDR");
nuclear@26 294
nuclear@26 295 if (color_type < 0 || color_type == 1 ||
nuclear@26 296 color_type == 5 || color_type > 6)
nuclear@26 297 png_error(png_ptr, "Invalid color type in IHDR");
nuclear@26 298
nuclear@26 299 if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
nuclear@26 300 ((color_type == PNG_COLOR_TYPE_RGB ||
nuclear@26 301 color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
nuclear@26 302 color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
nuclear@26 303 png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
nuclear@26 304
nuclear@26 305 if (interlace_type >= PNG_INTERLACE_LAST)
nuclear@26 306 png_error(png_ptr, "Unknown interlace method in IHDR");
nuclear@26 307
nuclear@26 308 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
nuclear@26 309 png_error(png_ptr, "Unknown compression method in IHDR");
nuclear@26 310
nuclear@26 311 #if defined(PNG_MNG_FEATURES_SUPPORTED)
nuclear@26 312 /* Accept filter_method 64 (intrapixel differencing) only if
nuclear@26 313 * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
nuclear@26 314 * 2. Libpng did not read a PNG signature (this filter_method is only
nuclear@26 315 * used in PNG datastreams that are embedded in MNG datastreams) and
nuclear@26 316 * 3. The application called png_permit_mng_features with a mask that
nuclear@26 317 * included PNG_FLAG_MNG_FILTER_64 and
nuclear@26 318 * 4. The filter_method is 64 and
nuclear@26 319 * 5. The color_type is RGB or RGBA
nuclear@26 320 */
nuclear@26 321 if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
nuclear@26 322 png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
nuclear@26 323 if (filter_type != PNG_FILTER_TYPE_BASE)
nuclear@26 324 {
nuclear@26 325 if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
nuclear@26 326 (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
nuclear@26 327 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
nuclear@26 328 (color_type == PNG_COLOR_TYPE_RGB ||
nuclear@26 329 color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
nuclear@26 330 png_error(png_ptr, "Unknown filter method in IHDR");
nuclear@26 331 if (png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
nuclear@26 332 png_warning(png_ptr, "Invalid filter method in IHDR");
nuclear@26 333 }
nuclear@26 334 #else
nuclear@26 335 if (filter_type != PNG_FILTER_TYPE_BASE)
nuclear@26 336 png_error(png_ptr, "Unknown filter method in IHDR");
nuclear@26 337 #endif
nuclear@26 338
nuclear@26 339 info_ptr->width = width;
nuclear@26 340 info_ptr->height = height;
nuclear@26 341 info_ptr->bit_depth = (png_byte)bit_depth;
nuclear@26 342 info_ptr->color_type =(png_byte) color_type;
nuclear@26 343 info_ptr->compression_type = (png_byte)compression_type;
nuclear@26 344 info_ptr->filter_type = (png_byte)filter_type;
nuclear@26 345 info_ptr->interlace_type = (png_byte)interlace_type;
nuclear@26 346 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
nuclear@26 347 info_ptr->channels = 1;
nuclear@26 348 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
nuclear@26 349 info_ptr->channels = 3;
nuclear@26 350 else
nuclear@26 351 info_ptr->channels = 1;
nuclear@26 352 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
nuclear@26 353 info_ptr->channels++;
nuclear@26 354 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
nuclear@26 355
nuclear@26 356 /* check for potential overflow */
nuclear@26 357 if (width > (PNG_UINT_32_MAX
nuclear@26 358 >> 3) /* 8-byte RGBA pixels */
nuclear@26 359 - 64 /* bigrowbuf hack */
nuclear@26 360 - 1 /* filter byte */
nuclear@26 361 - 7*8 /* rounding of width to multiple of 8 pixels */
nuclear@26 362 - 8) /* extra max_pixel_depth pad */
nuclear@26 363 info_ptr->rowbytes = (png_size_t)0;
nuclear@26 364 else
nuclear@26 365 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
nuclear@26 366 }
nuclear@26 367
nuclear@26 368 #if defined(PNG_oFFs_SUPPORTED)
nuclear@26 369 void PNGAPI
nuclear@26 370 png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
nuclear@26 371 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
nuclear@26 372 {
nuclear@26 373 png_debug1(1, "in %s storage function\n", "oFFs");
nuclear@26 374 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 375 return;
nuclear@26 376
nuclear@26 377 info_ptr->x_offset = offset_x;
nuclear@26 378 info_ptr->y_offset = offset_y;
nuclear@26 379 info_ptr->offset_unit_type = (png_byte)unit_type;
nuclear@26 380 info_ptr->valid |= PNG_INFO_oFFs;
nuclear@26 381 }
nuclear@26 382 #endif
nuclear@26 383
nuclear@26 384 #if defined(PNG_pCAL_SUPPORTED)
nuclear@26 385 void PNGAPI
nuclear@26 386 png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
nuclear@26 387 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
nuclear@26 388 png_charp units, png_charpp params)
nuclear@26 389 {
nuclear@26 390 png_uint_32 length;
nuclear@26 391 int i;
nuclear@26 392
nuclear@26 393 png_debug1(1, "in %s storage function\n", "pCAL");
nuclear@26 394 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 395 return;
nuclear@26 396
nuclear@26 397 length = png_strlen(purpose) + 1;
nuclear@26 398 png_debug1(3, "allocating purpose for info (%lu bytes)\n",
nuclear@26 399 (unsigned long)length);
nuclear@26 400 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@26 401 if (info_ptr->pcal_purpose == NULL)
nuclear@26 402 {
nuclear@26 403 png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
nuclear@26 404 return;
nuclear@26 405 }
nuclear@26 406 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
nuclear@26 407
nuclear@26 408 png_debug(3, "storing X0, X1, type, and nparams in info\n");
nuclear@26 409 info_ptr->pcal_X0 = X0;
nuclear@26 410 info_ptr->pcal_X1 = X1;
nuclear@26 411 info_ptr->pcal_type = (png_byte)type;
nuclear@26 412 info_ptr->pcal_nparams = (png_byte)nparams;
nuclear@26 413
nuclear@26 414 length = png_strlen(units) + 1;
nuclear@26 415 png_debug1(3, "allocating units for info (%lu bytes)\n",
nuclear@26 416 (unsigned long)length);
nuclear@26 417 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@26 418 if (info_ptr->pcal_units == NULL)
nuclear@26 419 {
nuclear@26 420 png_warning(png_ptr, "Insufficient memory for pCAL units.");
nuclear@26 421 return;
nuclear@26 422 }
nuclear@26 423 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
nuclear@26 424
nuclear@26 425 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
nuclear@26 426 (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
nuclear@26 427 if (info_ptr->pcal_params == NULL)
nuclear@26 428 {
nuclear@26 429 png_warning(png_ptr, "Insufficient memory for pCAL params.");
nuclear@26 430 return;
nuclear@26 431 }
nuclear@26 432
nuclear@26 433 info_ptr->pcal_params[nparams] = NULL;
nuclear@26 434
nuclear@26 435 for (i = 0; i < nparams; i++)
nuclear@26 436 {
nuclear@26 437 length = png_strlen(params[i]) + 1;
nuclear@26 438 png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i,
nuclear@26 439 (unsigned long)length);
nuclear@26 440 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@26 441 if (info_ptr->pcal_params[i] == NULL)
nuclear@26 442 {
nuclear@26 443 png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
nuclear@26 444 return;
nuclear@26 445 }
nuclear@26 446 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
nuclear@26 447 }
nuclear@26 448
nuclear@26 449 info_ptr->valid |= PNG_INFO_pCAL;
nuclear@26 450 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 451 info_ptr->free_me |= PNG_FREE_PCAL;
nuclear@26 452 #endif
nuclear@26 453 }
nuclear@26 454 #endif
nuclear@26 455
nuclear@26 456 #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
nuclear@26 457 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 458 void PNGAPI
nuclear@26 459 png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
nuclear@26 460 int unit, double width, double height)
nuclear@26 461 {
nuclear@26 462 png_debug1(1, "in %s storage function\n", "sCAL");
nuclear@26 463 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 464 return;
nuclear@26 465
nuclear@26 466 info_ptr->scal_unit = (png_byte)unit;
nuclear@26 467 info_ptr->scal_pixel_width = width;
nuclear@26 468 info_ptr->scal_pixel_height = height;
nuclear@26 469
nuclear@26 470 info_ptr->valid |= PNG_INFO_sCAL;
nuclear@26 471 }
nuclear@26 472 #else
nuclear@26 473 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 474 void PNGAPI
nuclear@26 475 png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
nuclear@26 476 int unit, png_charp swidth, png_charp sheight)
nuclear@26 477 {
nuclear@26 478 png_uint_32 length;
nuclear@26 479
nuclear@26 480 png_debug1(1, "in %s storage function\n", "sCAL");
nuclear@26 481 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 482 return;
nuclear@26 483
nuclear@26 484 info_ptr->scal_unit = (png_byte)unit;
nuclear@26 485
nuclear@26 486 length = png_strlen(swidth) + 1;
nuclear@26 487 png_debug1(3, "allocating unit for info (%u bytes)\n",
nuclear@26 488 (unsigned int)length);
nuclear@26 489 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@26 490 if (info_ptr->scal_s_width == NULL)
nuclear@26 491 {
nuclear@26 492 png_warning(png_ptr,
nuclear@26 493 "Memory allocation failed while processing sCAL.");
nuclear@26 494 return;
nuclear@26 495 }
nuclear@26 496 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
nuclear@26 497
nuclear@26 498 length = png_strlen(sheight) + 1;
nuclear@26 499 png_debug1(3, "allocating unit for info (%u bytes)\n",
nuclear@26 500 (unsigned int)length);
nuclear@26 501 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@26 502 if (info_ptr->scal_s_height == NULL)
nuclear@26 503 {
nuclear@26 504 png_free (png_ptr, info_ptr->scal_s_width);
nuclear@26 505 info_ptr->scal_s_width = NULL;
nuclear@26 506 png_warning(png_ptr,
nuclear@26 507 "Memory allocation failed while processing sCAL.");
nuclear@26 508 return;
nuclear@26 509 }
nuclear@26 510 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
nuclear@26 511 info_ptr->valid |= PNG_INFO_sCAL;
nuclear@26 512 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 513 info_ptr->free_me |= PNG_FREE_SCAL;
nuclear@26 514 #endif
nuclear@26 515 }
nuclear@26 516 #endif
nuclear@26 517 #endif
nuclear@26 518 #endif
nuclear@26 519
nuclear@26 520 #if defined(PNG_pHYs_SUPPORTED)
nuclear@26 521 void PNGAPI
nuclear@26 522 png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
nuclear@26 523 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
nuclear@26 524 {
nuclear@26 525 png_debug1(1, "in %s storage function\n", "pHYs");
nuclear@26 526 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 527 return;
nuclear@26 528
nuclear@26 529 info_ptr->x_pixels_per_unit = res_x;
nuclear@26 530 info_ptr->y_pixels_per_unit = res_y;
nuclear@26 531 info_ptr->phys_unit_type = (png_byte)unit_type;
nuclear@26 532 info_ptr->valid |= PNG_INFO_pHYs;
nuclear@26 533 }
nuclear@26 534 #endif
nuclear@26 535
nuclear@26 536 void PNGAPI
nuclear@26 537 png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
nuclear@26 538 png_colorp palette, int num_palette)
nuclear@26 539 {
nuclear@26 540
nuclear@26 541 png_debug1(1, "in %s storage function\n", "PLTE");
nuclear@26 542 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 543 return;
nuclear@26 544
nuclear@26 545 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
nuclear@26 546 {
nuclear@26 547 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
nuclear@26 548 png_error(png_ptr, "Invalid palette length");
nuclear@26 549 else
nuclear@26 550 {
nuclear@26 551 png_warning(png_ptr, "Invalid palette length");
nuclear@26 552 return;
nuclear@26 553 }
nuclear@26 554 }
nuclear@26 555
nuclear@26 556 /*
nuclear@26 557 * It may not actually be necessary to set png_ptr->palette here;
nuclear@26 558 * we do it for backward compatibility with the way the png_handle_tRNS
nuclear@26 559 * function used to do the allocation.
nuclear@26 560 */
nuclear@26 561 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 562 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
nuclear@26 563 #endif
nuclear@26 564
nuclear@26 565 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
nuclear@26 566 of num_palette entries,
nuclear@26 567 in case of an invalid PNG file that has too-large sample values. */
nuclear@26 568 png_ptr->palette = (png_colorp)png_malloc(png_ptr,
nuclear@26 569 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
nuclear@26 570 png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
nuclear@26 571 png_sizeof(png_color));
nuclear@26 572 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
nuclear@26 573 info_ptr->palette = png_ptr->palette;
nuclear@26 574 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
nuclear@26 575
nuclear@26 576 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 577 info_ptr->free_me |= PNG_FREE_PLTE;
nuclear@26 578 #else
nuclear@26 579 png_ptr->flags |= PNG_FLAG_FREE_PLTE;
nuclear@26 580 #endif
nuclear@26 581
nuclear@26 582 info_ptr->valid |= PNG_INFO_PLTE;
nuclear@26 583 }
nuclear@26 584
nuclear@26 585 #if defined(PNG_sBIT_SUPPORTED)
nuclear@26 586 void PNGAPI
nuclear@26 587 png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
nuclear@26 588 png_color_8p sig_bit)
nuclear@26 589 {
nuclear@26 590 png_debug1(1, "in %s storage function\n", "sBIT");
nuclear@26 591 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 592 return;
nuclear@26 593
nuclear@26 594 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
nuclear@26 595 info_ptr->valid |= PNG_INFO_sBIT;
nuclear@26 596 }
nuclear@26 597 #endif
nuclear@26 598
nuclear@26 599 #if defined(PNG_sRGB_SUPPORTED)
nuclear@26 600 void PNGAPI
nuclear@26 601 png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
nuclear@26 602 {
nuclear@26 603 png_debug1(1, "in %s storage function\n", "sRGB");
nuclear@26 604 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 605 return;
nuclear@26 606
nuclear@26 607 info_ptr->srgb_intent = (png_byte)intent;
nuclear@26 608 info_ptr->valid |= PNG_INFO_sRGB;
nuclear@26 609 }
nuclear@26 610
nuclear@26 611 void PNGAPI
nuclear@26 612 png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
nuclear@26 613 int intent)
nuclear@26 614 {
nuclear@26 615 #if defined(PNG_gAMA_SUPPORTED)
nuclear@26 616 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 617 float file_gamma;
nuclear@26 618 #endif
nuclear@26 619 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 620 png_fixed_point int_file_gamma;
nuclear@26 621 #endif
nuclear@26 622 #endif
nuclear@26 623 #if defined(PNG_cHRM_SUPPORTED)
nuclear@26 624 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 625 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
nuclear@26 626 #endif
nuclear@26 627 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 628 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
nuclear@26 629 int_green_y, int_blue_x, int_blue_y;
nuclear@26 630 #endif
nuclear@26 631 #endif
nuclear@26 632 png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
nuclear@26 633 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 634 return;
nuclear@26 635
nuclear@26 636 png_set_sRGB(png_ptr, info_ptr, intent);
nuclear@26 637
nuclear@26 638 #if defined(PNG_gAMA_SUPPORTED)
nuclear@26 639 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 640 file_gamma = (float).45455;
nuclear@26 641 png_set_gAMA(png_ptr, info_ptr, file_gamma);
nuclear@26 642 #endif
nuclear@26 643 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 644 int_file_gamma = 45455L;
nuclear@26 645 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
nuclear@26 646 #endif
nuclear@26 647 #endif
nuclear@26 648
nuclear@26 649 #if defined(PNG_cHRM_SUPPORTED)
nuclear@26 650 #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@26 651 int_white_x = 31270L;
nuclear@26 652 int_white_y = 32900L;
nuclear@26 653 int_red_x = 64000L;
nuclear@26 654 int_red_y = 33000L;
nuclear@26 655 int_green_x = 30000L;
nuclear@26 656 int_green_y = 60000L;
nuclear@26 657 int_blue_x = 15000L;
nuclear@26 658 int_blue_y = 6000L;
nuclear@26 659
nuclear@26 660 png_set_cHRM_fixed(png_ptr, info_ptr,
nuclear@26 661 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
nuclear@26 662 int_blue_x, int_blue_y);
nuclear@26 663 #endif
nuclear@26 664 #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@26 665 white_x = (float).3127;
nuclear@26 666 white_y = (float).3290;
nuclear@26 667 red_x = (float).64;
nuclear@26 668 red_y = (float).33;
nuclear@26 669 green_x = (float).30;
nuclear@26 670 green_y = (float).60;
nuclear@26 671 blue_x = (float).15;
nuclear@26 672 blue_y = (float).06;
nuclear@26 673
nuclear@26 674 png_set_cHRM(png_ptr, info_ptr,
nuclear@26 675 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
nuclear@26 676 #endif
nuclear@26 677 #endif
nuclear@26 678 }
nuclear@26 679 #endif
nuclear@26 680
nuclear@26 681
nuclear@26 682 #if defined(PNG_iCCP_SUPPORTED)
nuclear@26 683 void PNGAPI
nuclear@26 684 png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
nuclear@26 685 png_charp name, int compression_type,
nuclear@26 686 png_charp profile, png_uint_32 proflen)
nuclear@26 687 {
nuclear@26 688 png_charp new_iccp_name;
nuclear@26 689 png_charp new_iccp_profile;
nuclear@26 690 png_uint_32 length;
nuclear@26 691
nuclear@26 692 png_debug1(1, "in %s storage function\n", "iCCP");
nuclear@26 693 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
nuclear@26 694 return;
nuclear@26 695
nuclear@26 696 length = png_strlen(name)+1;
nuclear@26 697 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@26 698 if (new_iccp_name == NULL)
nuclear@26 699 {
nuclear@26 700 png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
nuclear@26 701 return;
nuclear@26 702 }
nuclear@26 703 png_memcpy(new_iccp_name, name, length);
nuclear@26 704 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
nuclear@26 705 if (new_iccp_profile == NULL)
nuclear@26 706 {
nuclear@26 707 png_free (png_ptr, new_iccp_name);
nuclear@26 708 png_warning(png_ptr,
nuclear@26 709 "Insufficient memory to process iCCP profile.");
nuclear@26 710 return;
nuclear@26 711 }
nuclear@26 712 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
nuclear@26 713
nuclear@26 714 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
nuclear@26 715
nuclear@26 716 info_ptr->iccp_proflen = proflen;
nuclear@26 717 info_ptr->iccp_name = new_iccp_name;
nuclear@26 718 info_ptr->iccp_profile = new_iccp_profile;
nuclear@26 719 /* Compression is always zero but is here so the API and info structure
nuclear@26 720 * does not have to change if we introduce multiple compression types */
nuclear@26 721 info_ptr->iccp_compression = (png_byte)compression_type;
nuclear@26 722 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 723 info_ptr->free_me |= PNG_FREE_ICCP;
nuclear@26 724 #endif
nuclear@26 725 info_ptr->valid |= PNG_INFO_iCCP;
nuclear@26 726 }
nuclear@26 727 #endif
nuclear@26 728
nuclear@26 729 #if defined(PNG_TEXT_SUPPORTED)
nuclear@26 730 void PNGAPI
nuclear@26 731 png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
nuclear@26 732 int num_text)
nuclear@26 733 {
nuclear@26 734 int ret;
nuclear@26 735 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
nuclear@26 736 if (ret)
nuclear@26 737 png_error(png_ptr, "Insufficient memory to store text");
nuclear@26 738 }
nuclear@26 739
nuclear@26 740 int /* PRIVATE */
nuclear@26 741 png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
nuclear@26 742 int num_text)
nuclear@26 743 {
nuclear@26 744 int i;
nuclear@26 745
nuclear@26 746 png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
nuclear@26 747 "text" : (png_const_charp)png_ptr->chunk_name));
nuclear@26 748
nuclear@26 749 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
nuclear@26 750 return(0);
nuclear@26 751
nuclear@26 752 /* Make sure we have enough space in the "text" array in info_struct
nuclear@26 753 * to hold all of the incoming text_ptr objects.
nuclear@26 754 */
nuclear@26 755 if (info_ptr->num_text + num_text > info_ptr->max_text)
nuclear@26 756 {
nuclear@26 757 if (info_ptr->text != NULL)
nuclear@26 758 {
nuclear@26 759 png_textp old_text;
nuclear@26 760 int old_max;
nuclear@26 761
nuclear@26 762 old_max = info_ptr->max_text;
nuclear@26 763 info_ptr->max_text = info_ptr->num_text + num_text + 8;
nuclear@26 764 old_text = info_ptr->text;
nuclear@26 765 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
nuclear@26 766 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
nuclear@26 767 if (info_ptr->text == NULL)
nuclear@26 768 {
nuclear@26 769 png_free(png_ptr, old_text);
nuclear@26 770 return(1);
nuclear@26 771 }
nuclear@26 772 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
nuclear@26 773 png_sizeof(png_text)));
nuclear@26 774 png_free(png_ptr, old_text);
nuclear@26 775 }
nuclear@26 776 else
nuclear@26 777 {
nuclear@26 778 info_ptr->max_text = num_text + 8;
nuclear@26 779 info_ptr->num_text = 0;
nuclear@26 780 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
nuclear@26 781 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
nuclear@26 782 if (info_ptr->text == NULL)
nuclear@26 783 return(1);
nuclear@26 784 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 785 info_ptr->free_me |= PNG_FREE_TEXT;
nuclear@26 786 #endif
nuclear@26 787 }
nuclear@26 788 png_debug1(3, "allocated %d entries for info_ptr->text\n",
nuclear@26 789 info_ptr->max_text);
nuclear@26 790 }
nuclear@26 791 for (i = 0; i < num_text; i++)
nuclear@26 792 {
nuclear@26 793 png_size_t text_length, key_len;
nuclear@26 794 png_size_t lang_len, lang_key_len;
nuclear@26 795 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
nuclear@26 796
nuclear@26 797 if (text_ptr[i].key == NULL)
nuclear@26 798 continue;
nuclear@26 799
nuclear@26 800 key_len = png_strlen(text_ptr[i].key);
nuclear@26 801
nuclear@26 802 if (text_ptr[i].compression <= 0)
nuclear@26 803 {
nuclear@26 804 lang_len = 0;
nuclear@26 805 lang_key_len = 0;
nuclear@26 806 }
nuclear@26 807 else
nuclear@26 808 #ifdef PNG_iTXt_SUPPORTED
nuclear@26 809 {
nuclear@26 810 /* set iTXt data */
nuclear@26 811 if (text_ptr[i].lang != NULL)
nuclear@26 812 lang_len = png_strlen(text_ptr[i].lang);
nuclear@26 813 else
nuclear@26 814 lang_len = 0;
nuclear@26 815 if (text_ptr[i].lang_key != NULL)
nuclear@26 816 lang_key_len = png_strlen(text_ptr[i].lang_key);
nuclear@26 817 else
nuclear@26 818 lang_key_len = 0;
nuclear@26 819 }
nuclear@26 820 #else
nuclear@26 821 {
nuclear@26 822 png_warning(png_ptr, "iTXt chunk not supported.");
nuclear@26 823 continue;
nuclear@26 824 }
nuclear@26 825 #endif
nuclear@26 826
nuclear@26 827 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
nuclear@26 828 {
nuclear@26 829 text_length = 0;
nuclear@26 830 #ifdef PNG_iTXt_SUPPORTED
nuclear@26 831 if (text_ptr[i].compression > 0)
nuclear@26 832 textp->compression = PNG_ITXT_COMPRESSION_NONE;
nuclear@26 833 else
nuclear@26 834 #endif
nuclear@26 835 textp->compression = PNG_TEXT_COMPRESSION_NONE;
nuclear@26 836 }
nuclear@26 837 else
nuclear@26 838 {
nuclear@26 839 text_length = png_strlen(text_ptr[i].text);
nuclear@26 840 textp->compression = text_ptr[i].compression;
nuclear@26 841 }
nuclear@26 842
nuclear@26 843 textp->key = (png_charp)png_malloc_warn(png_ptr,
nuclear@26 844 (png_uint_32)
nuclear@26 845 (key_len + text_length + lang_len + lang_key_len + 4));
nuclear@26 846 if (textp->key == NULL)
nuclear@26 847 return(1);
nuclear@26 848 png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
nuclear@26 849 (png_uint_32)
nuclear@26 850 (key_len + lang_len + lang_key_len + text_length + 4),
nuclear@26 851 (int)textp->key);
nuclear@26 852
nuclear@26 853 png_memcpy(textp->key, text_ptr[i].key,
nuclear@26 854 (png_size_t)(key_len));
nuclear@26 855 *(textp->key + key_len) = '\0';
nuclear@26 856 #ifdef PNG_iTXt_SUPPORTED
nuclear@26 857 if (text_ptr[i].compression > 0)
nuclear@26 858 {
nuclear@26 859 textp->lang = textp->key + key_len + 1;
nuclear@26 860 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
nuclear@26 861 *(textp->lang + lang_len) = '\0';
nuclear@26 862 textp->lang_key = textp->lang + lang_len + 1;
nuclear@26 863 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
nuclear@26 864 *(textp->lang_key + lang_key_len) = '\0';
nuclear@26 865 textp->text = textp->lang_key + lang_key_len + 1;
nuclear@26 866 }
nuclear@26 867 else
nuclear@26 868 #endif
nuclear@26 869 {
nuclear@26 870 #ifdef PNG_iTXt_SUPPORTED
nuclear@26 871 textp->lang=NULL;
nuclear@26 872 textp->lang_key=NULL;
nuclear@26 873 #endif
nuclear@26 874 textp->text = textp->key + key_len + 1;
nuclear@26 875 }
nuclear@26 876 if (text_length)
nuclear@26 877 png_memcpy(textp->text, text_ptr[i].text,
nuclear@26 878 (png_size_t)(text_length));
nuclear@26 879 *(textp->text + text_length) = '\0';
nuclear@26 880
nuclear@26 881 #ifdef PNG_iTXt_SUPPORTED
nuclear@26 882 if (textp->compression > 0)
nuclear@26 883 {
nuclear@26 884 textp->text_length = 0;
nuclear@26 885 textp->itxt_length = text_length;
nuclear@26 886 }
nuclear@26 887 else
nuclear@26 888 #endif
nuclear@26 889 {
nuclear@26 890 textp->text_length = text_length;
nuclear@26 891 #ifdef PNG_iTXt_SUPPORTED
nuclear@26 892 textp->itxt_length = 0;
nuclear@26 893 #endif
nuclear@26 894 }
nuclear@26 895 info_ptr->num_text++;
nuclear@26 896 png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
nuclear@26 897 }
nuclear@26 898 return(0);
nuclear@26 899 }
nuclear@26 900 #endif
nuclear@26 901
nuclear@26 902 #if defined(PNG_tIME_SUPPORTED)
nuclear@26 903 void PNGAPI
nuclear@26 904 png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
nuclear@26 905 {
nuclear@26 906 png_debug1(1, "in %s storage function\n", "tIME");
nuclear@26 907 if (png_ptr == NULL || info_ptr == NULL ||
nuclear@26 908 (png_ptr->mode & PNG_WROTE_tIME))
nuclear@26 909 return;
nuclear@26 910
nuclear@26 911 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
nuclear@26 912 info_ptr->valid |= PNG_INFO_tIME;
nuclear@26 913 }
nuclear@26 914 #endif
nuclear@26 915
nuclear@26 916 #if defined(PNG_tRNS_SUPPORTED)
nuclear@26 917 void PNGAPI
nuclear@26 918 png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
nuclear@26 919 png_bytep trans, int num_trans, png_color_16p trans_values)
nuclear@26 920 {
nuclear@26 921 png_debug1(1, "in %s storage function\n", "tRNS");
nuclear@26 922 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 923 return;
nuclear@26 924
nuclear@26 925 if (trans != NULL)
nuclear@26 926 {
nuclear@26 927 /*
nuclear@26 928 * It may not actually be necessary to set png_ptr->trans here;
nuclear@26 929 * we do it for backward compatibility with the way the png_handle_tRNS
nuclear@26 930 * function used to do the allocation.
nuclear@26 931 */
nuclear@26 932
nuclear@26 933 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 934 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
nuclear@26 935 #endif
nuclear@26 936
nuclear@26 937 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
nuclear@26 938 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
nuclear@26 939 (png_uint_32)PNG_MAX_PALETTE_LENGTH);
nuclear@26 940 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
nuclear@26 941 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
nuclear@26 942 }
nuclear@26 943
nuclear@26 944 if (trans_values != NULL)
nuclear@26 945 {
nuclear@26 946 int sample_max = (1 << info_ptr->bit_depth);
nuclear@26 947 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
nuclear@26 948 (int)trans_values->gray > sample_max) ||
nuclear@26 949 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
nuclear@26 950 ((int)trans_values->red > sample_max ||
nuclear@26 951 (int)trans_values->green > sample_max ||
nuclear@26 952 (int)trans_values->blue > sample_max)))
nuclear@26 953 png_warning(png_ptr,
nuclear@26 954 "tRNS chunk has out-of-range samples for bit_depth");
nuclear@26 955 png_memcpy(&(info_ptr->trans_values), trans_values,
nuclear@26 956 png_sizeof(png_color_16));
nuclear@26 957 if (num_trans == 0)
nuclear@26 958 num_trans = 1;
nuclear@26 959 }
nuclear@26 960
nuclear@26 961 info_ptr->num_trans = (png_uint_16)num_trans;
nuclear@26 962 if (num_trans != 0)
nuclear@26 963 {
nuclear@26 964 info_ptr->valid |= PNG_INFO_tRNS;
nuclear@26 965 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 966 info_ptr->free_me |= PNG_FREE_TRNS;
nuclear@26 967 #else
nuclear@26 968 png_ptr->flags |= PNG_FLAG_FREE_TRNS;
nuclear@26 969 #endif
nuclear@26 970 }
nuclear@26 971 }
nuclear@26 972 #endif
nuclear@26 973
nuclear@26 974 #if defined(PNG_sPLT_SUPPORTED)
nuclear@26 975 void PNGAPI
nuclear@26 976 png_set_sPLT(png_structp png_ptr,
nuclear@26 977 png_infop info_ptr, png_sPLT_tp entries, int nentries)
nuclear@26 978 /*
nuclear@26 979 * entries - array of png_sPLT_t structures
nuclear@26 980 * to be added to the list of palettes
nuclear@26 981 * in the info structure.
nuclear@26 982 * nentries - number of palette structures to be
nuclear@26 983 * added.
nuclear@26 984 */
nuclear@26 985 {
nuclear@26 986 png_sPLT_tp np;
nuclear@26 987 int i;
nuclear@26 988
nuclear@26 989 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 990 return;
nuclear@26 991
nuclear@26 992 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
nuclear@26 993 (info_ptr->splt_palettes_num + nentries) *
nuclear@26 994 (png_uint_32)png_sizeof(png_sPLT_t));
nuclear@26 995 if (np == NULL)
nuclear@26 996 {
nuclear@26 997 png_warning(png_ptr, "No memory for sPLT palettes.");
nuclear@26 998 return;
nuclear@26 999 }
nuclear@26 1000
nuclear@26 1001 png_memcpy(np, info_ptr->splt_palettes,
nuclear@26 1002 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
nuclear@26 1003 png_free(png_ptr, info_ptr->splt_palettes);
nuclear@26 1004 info_ptr->splt_palettes=NULL;
nuclear@26 1005
nuclear@26 1006 for (i = 0; i < nentries; i++)
nuclear@26 1007 {
nuclear@26 1008 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
nuclear@26 1009 png_sPLT_tp from = entries + i;
nuclear@26 1010 png_uint_32 length;
nuclear@26 1011
nuclear@26 1012 length = png_strlen(from->name) + 1;
nuclear@26 1013 to->name = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@26 1014 if (to->name == NULL)
nuclear@26 1015 {
nuclear@26 1016 png_warning(png_ptr,
nuclear@26 1017 "Out of memory while processing sPLT chunk");
nuclear@26 1018 continue;
nuclear@26 1019 }
nuclear@26 1020 png_memcpy(to->name, from->name, length);
nuclear@26 1021 to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
nuclear@26 1022 (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
nuclear@26 1023 if (to->entries == NULL)
nuclear@26 1024 {
nuclear@26 1025 png_warning(png_ptr,
nuclear@26 1026 "Out of memory while processing sPLT chunk");
nuclear@26 1027 png_free(png_ptr, to->name);
nuclear@26 1028 to->name = NULL;
nuclear@26 1029 continue;
nuclear@26 1030 }
nuclear@26 1031 png_memcpy(to->entries, from->entries,
nuclear@26 1032 from->nentries * png_sizeof(png_sPLT_entry));
nuclear@26 1033 to->nentries = from->nentries;
nuclear@26 1034 to->depth = from->depth;
nuclear@26 1035 }
nuclear@26 1036
nuclear@26 1037 info_ptr->splt_palettes = np;
nuclear@26 1038 info_ptr->splt_palettes_num += nentries;
nuclear@26 1039 info_ptr->valid |= PNG_INFO_sPLT;
nuclear@26 1040 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 1041 info_ptr->free_me |= PNG_FREE_SPLT;
nuclear@26 1042 #endif
nuclear@26 1043 }
nuclear@26 1044 #endif /* PNG_sPLT_SUPPORTED */
nuclear@26 1045
nuclear@26 1046 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
nuclear@26 1047 void PNGAPI
nuclear@26 1048 png_set_unknown_chunks(png_structp png_ptr,
nuclear@26 1049 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
nuclear@26 1050 {
nuclear@26 1051 png_unknown_chunkp np;
nuclear@26 1052 int i;
nuclear@26 1053
nuclear@26 1054 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
nuclear@26 1055 return;
nuclear@26 1056
nuclear@26 1057 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
nuclear@26 1058 (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
nuclear@26 1059 png_sizeof(png_unknown_chunk)));
nuclear@26 1060 if (np == NULL)
nuclear@26 1061 {
nuclear@26 1062 png_warning(png_ptr,
nuclear@26 1063 "Out of memory while processing unknown chunk.");
nuclear@26 1064 return;
nuclear@26 1065 }
nuclear@26 1066
nuclear@26 1067 png_memcpy(np, info_ptr->unknown_chunks,
nuclear@26 1068 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
nuclear@26 1069 png_free(png_ptr, info_ptr->unknown_chunks);
nuclear@26 1070 info_ptr->unknown_chunks=NULL;
nuclear@26 1071
nuclear@26 1072 for (i = 0; i < num_unknowns; i++)
nuclear@26 1073 {
nuclear@26 1074 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
nuclear@26 1075 png_unknown_chunkp from = unknowns + i;
nuclear@26 1076
nuclear@26 1077 png_memcpy((png_charp)to->name,
nuclear@26 1078 (png_charp)from->name,
nuclear@26 1079 png_sizeof(from->name));
nuclear@26 1080 to->name[png_sizeof(to->name)-1] = '\0';
nuclear@26 1081 to->size = from->size;
nuclear@26 1082 /* note our location in the read or write sequence */
nuclear@26 1083 to->location = (png_byte)(png_ptr->mode & 0xff);
nuclear@26 1084
nuclear@26 1085 if (from->size == 0)
nuclear@26 1086 to->data=NULL;
nuclear@26 1087 else
nuclear@26 1088 {
nuclear@26 1089 to->data = (png_bytep)png_malloc_warn(png_ptr,
nuclear@26 1090 (png_uint_32)from->size);
nuclear@26 1091 if (to->data == NULL)
nuclear@26 1092 {
nuclear@26 1093 png_warning(png_ptr,
nuclear@26 1094 "Out of memory while processing unknown chunk.");
nuclear@26 1095 to->size = 0;
nuclear@26 1096 }
nuclear@26 1097 else
nuclear@26 1098 png_memcpy(to->data, from->data, from->size);
nuclear@26 1099 }
nuclear@26 1100 }
nuclear@26 1101
nuclear@26 1102 info_ptr->unknown_chunks = np;
nuclear@26 1103 info_ptr->unknown_chunks_num += num_unknowns;
nuclear@26 1104 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 1105 info_ptr->free_me |= PNG_FREE_UNKN;
nuclear@26 1106 #endif
nuclear@26 1107 }
nuclear@26 1108 void PNGAPI
nuclear@26 1109 png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
nuclear@26 1110 int chunk, int location)
nuclear@26 1111 {
nuclear@26 1112 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
nuclear@26 1113 (int)info_ptr->unknown_chunks_num)
nuclear@26 1114 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
nuclear@26 1115 }
nuclear@26 1116 #endif
nuclear@26 1117
nuclear@26 1118 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
nuclear@26 1119 #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
nuclear@26 1120 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
nuclear@26 1121 void PNGAPI
nuclear@26 1122 png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
nuclear@26 1123 {
nuclear@26 1124 /* This function is deprecated in favor of png_permit_mng_features()
nuclear@26 1125 and will be removed from libpng-1.3.0 */
nuclear@26 1126 png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
nuclear@26 1127 if (png_ptr == NULL)
nuclear@26 1128 return;
nuclear@26 1129 png_ptr->mng_features_permitted = (png_byte)
nuclear@26 1130 ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
nuclear@26 1131 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
nuclear@26 1132 }
nuclear@26 1133 #endif
nuclear@26 1134 #endif
nuclear@26 1135
nuclear@26 1136 #if defined(PNG_MNG_FEATURES_SUPPORTED)
nuclear@26 1137 png_uint_32 PNGAPI
nuclear@26 1138 png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
nuclear@26 1139 {
nuclear@26 1140 png_debug(1, "in png_permit_mng_features\n");
nuclear@26 1141 if (png_ptr == NULL)
nuclear@26 1142 return (png_uint_32)0;
nuclear@26 1143 png_ptr->mng_features_permitted =
nuclear@26 1144 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
nuclear@26 1145 return (png_uint_32)png_ptr->mng_features_permitted;
nuclear@26 1146 }
nuclear@26 1147 #endif
nuclear@26 1148
nuclear@26 1149 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
nuclear@26 1150 void PNGAPI
nuclear@26 1151 png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
nuclear@26 1152 chunk_list, int num_chunks)
nuclear@26 1153 {
nuclear@26 1154 png_bytep new_list, p;
nuclear@26 1155 int i, old_num_chunks;
nuclear@26 1156 if (png_ptr == NULL)
nuclear@26 1157 return;
nuclear@26 1158 if (num_chunks == 0)
nuclear@26 1159 {
nuclear@26 1160 if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
nuclear@26 1161 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
nuclear@26 1162 else
nuclear@26 1163 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
nuclear@26 1164
nuclear@26 1165 if (keep == PNG_HANDLE_CHUNK_ALWAYS)
nuclear@26 1166 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
nuclear@26 1167 else
nuclear@26 1168 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
nuclear@26 1169 return;
nuclear@26 1170 }
nuclear@26 1171 if (chunk_list == NULL)
nuclear@26 1172 return;
nuclear@26 1173 old_num_chunks = png_ptr->num_chunk_list;
nuclear@26 1174 new_list=(png_bytep)png_malloc(png_ptr,
nuclear@26 1175 (png_uint_32)
nuclear@26 1176 (5*(num_chunks + old_num_chunks)));
nuclear@26 1177 if (png_ptr->chunk_list != NULL)
nuclear@26 1178 {
nuclear@26 1179 png_memcpy(new_list, png_ptr->chunk_list,
nuclear@26 1180 (png_size_t)(5*old_num_chunks));
nuclear@26 1181 png_free(png_ptr, png_ptr->chunk_list);
nuclear@26 1182 png_ptr->chunk_list=NULL;
nuclear@26 1183 }
nuclear@26 1184 png_memcpy(new_list + 5*old_num_chunks, chunk_list,
nuclear@26 1185 (png_size_t)(5*num_chunks));
nuclear@26 1186 for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
nuclear@26 1187 *p=(png_byte)keep;
nuclear@26 1188 png_ptr->num_chunk_list = old_num_chunks + num_chunks;
nuclear@26 1189 png_ptr->chunk_list = new_list;
nuclear@26 1190 #ifdef PNG_FREE_ME_SUPPORTED
nuclear@26 1191 png_ptr->free_me |= PNG_FREE_LIST;
nuclear@26 1192 #endif
nuclear@26 1193 }
nuclear@26 1194 #endif
nuclear@26 1195
nuclear@26 1196 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
nuclear@26 1197 void PNGAPI
nuclear@26 1198 png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
nuclear@26 1199 png_user_chunk_ptr read_user_chunk_fn)
nuclear@26 1200 {
nuclear@26 1201 png_debug(1, "in png_set_read_user_chunk_fn\n");
nuclear@26 1202 if (png_ptr == NULL)
nuclear@26 1203 return;
nuclear@26 1204 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
nuclear@26 1205 png_ptr->user_chunk_ptr = user_chunk_ptr;
nuclear@26 1206 }
nuclear@26 1207 #endif
nuclear@26 1208
nuclear@26 1209 #if defined(PNG_INFO_IMAGE_SUPPORTED)
nuclear@26 1210 void PNGAPI
nuclear@26 1211 png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
nuclear@26 1212 {
nuclear@26 1213 png_debug1(1, "in %s storage function\n", "rows");
nuclear@26 1214
nuclear@26 1215 if (png_ptr == NULL || info_ptr == NULL)
nuclear@26 1216 return;
nuclear@26 1217
nuclear@26 1218 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
nuclear@26 1219 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
nuclear@26 1220 info_ptr->row_pointers = row_pointers;
nuclear@26 1221 if (row_pointers)
nuclear@26 1222 info_ptr->valid |= PNG_INFO_IDAT;
nuclear@26 1223 }
nuclear@26 1224 #endif
nuclear@26 1225
nuclear@26 1226 #ifdef PNG_WRITE_SUPPORTED
nuclear@26 1227 void PNGAPI
nuclear@26 1228 png_set_compression_buffer_size(png_structp png_ptr,
nuclear@26 1229 png_uint_32 size)
nuclear@26 1230 {
nuclear@26 1231 if (png_ptr == NULL)
nuclear@26 1232 return;
nuclear@26 1233 png_free(png_ptr, png_ptr->zbuf);
nuclear@26 1234 png_ptr->zbuf_size = (png_size_t)size;
nuclear@26 1235 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
nuclear@26 1236 png_ptr->zstream.next_out = png_ptr->zbuf;
nuclear@26 1237 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
nuclear@26 1238 }
nuclear@26 1239 #endif
nuclear@26 1240
nuclear@26 1241 void PNGAPI
nuclear@26 1242 png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
nuclear@26 1243 {
nuclear@26 1244 if (png_ptr && info_ptr)
nuclear@26 1245 info_ptr->valid &= ~mask;
nuclear@26 1246 }
nuclear@26 1247
nuclear@26 1248
nuclear@26 1249 #ifndef PNG_1_0_X
nuclear@26 1250 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
nuclear@26 1251 /* function was added to libpng 1.2.0 and should always exist by default */
nuclear@26 1252 void PNGAPI
nuclear@26 1253 png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
nuclear@26 1254 {
nuclear@26 1255 /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
nuclear@26 1256 if (png_ptr != NULL)
nuclear@26 1257 png_ptr->asm_flags = 0;
nuclear@26 1258 asm_flags = asm_flags; /* Quiet the compiler */
nuclear@26 1259 }
nuclear@26 1260
nuclear@26 1261 /* this function was added to libpng 1.2.0 */
nuclear@26 1262 void PNGAPI
nuclear@26 1263 png_set_mmx_thresholds (png_structp png_ptr,
nuclear@26 1264 png_byte mmx_bitdepth_threshold,
nuclear@26 1265 png_uint_32 mmx_rowbytes_threshold)
nuclear@26 1266 {
nuclear@26 1267 /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
nuclear@26 1268 if (png_ptr == NULL)
nuclear@26 1269 return;
nuclear@26 1270 /* Quiet the compiler */
nuclear@26 1271 mmx_bitdepth_threshold = mmx_bitdepth_threshold;
nuclear@26 1272 mmx_rowbytes_threshold = mmx_rowbytes_threshold;
nuclear@26 1273 }
nuclear@26 1274 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
nuclear@26 1275
nuclear@26 1276 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
nuclear@26 1277 /* this function was added to libpng 1.2.6 */
nuclear@26 1278 void PNGAPI
nuclear@26 1279 png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
nuclear@26 1280 png_uint_32 user_height_max)
nuclear@26 1281 {
nuclear@26 1282 /* Images with dimensions larger than these limits will be
nuclear@26 1283 * rejected by png_set_IHDR(). To accept any PNG datastream
nuclear@26 1284 * regardless of dimensions, set both limits to 0x7ffffffL.
nuclear@26 1285 */
nuclear@26 1286 if (png_ptr == NULL) return;
nuclear@26 1287 png_ptr->user_width_max = user_width_max;
nuclear@26 1288 png_ptr->user_height_max = user_height_max;
nuclear@26 1289 }
nuclear@26 1290 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
nuclear@26 1291
nuclear@26 1292 #endif /* ?PNG_1_0_X */
nuclear@26 1293 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */