| 1 | |
| 2 | /* pngget.c - retrieval of values from info struct |
| 3 | * |
| 4 | * libpng 1.0.3 - January 14, 1999 |
| 5 | * For conditions of distribution and use, see copyright notice in png.h |
| 6 | * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. |
| 7 | * Copyright (c) 1996, 1997 Andreas Dilger |
| 8 | * Copyright (c) 1998, 1999 Glenn Randers-Pehrson |
| 9 | */ |
| 10 | |
| 11 | #define PNG_INTERNAL |
| 12 | #include "png.h" |
| 13 | |
| 14 | png_uint_32 |
| 15 | png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag) |
| 16 | { |
| 17 | if (png_ptr != NULL && info_ptr != NULL) |
| 18 | return(info_ptr->valid & flag); |
| 19 | else |
| 20 | return(0); |
| 21 | } |
| 22 | |
| 23 | png_uint_32 |
| 24 | png_get_rowbytes(png_structp png_ptr, png_infop info_ptr) |
| 25 | { |
| 26 | if (png_ptr != NULL && info_ptr != NULL) |
| 27 | return(info_ptr->rowbytes); |
| 28 | else |
| 29 | return(0); |
| 30 | } |
| 31 | |
| 32 | #ifdef PNG_EASY_ACCESS_SUPPORTED |
| 33 | /* easy access to info, added in libpng-0.99 */ |
| 34 | png_uint_32 |
| 35 | png_get_image_width(png_structp png_ptr, png_infop info_ptr) |
| 36 | { |
| 37 | if (png_ptr != NULL && info_ptr != NULL) |
| 38 | { |
| 39 | return info_ptr->width; |
| 40 | } |
| 41 | return (0); |
| 42 | } |
| 43 | |
| 44 | png_uint_32 |
| 45 | png_get_image_height(png_structp png_ptr, png_infop info_ptr) |
| 46 | { |
| 47 | if (png_ptr != NULL && info_ptr != NULL) |
| 48 | { |
| 49 | return info_ptr->height; |
| 50 | } |
| 51 | return (0); |
| 52 | } |
| 53 | |
| 54 | png_byte |
| 55 | png_get_bit_depth(png_structp png_ptr, png_infop info_ptr) |
| 56 | { |
| 57 | if (png_ptr != NULL && info_ptr != NULL) |
| 58 | { |
| 59 | return info_ptr->bit_depth; |
| 60 | } |
| 61 | return (0); |
| 62 | } |
| 63 | |
| 64 | png_byte |
| 65 | png_get_color_type(png_structp png_ptr, png_infop info_ptr) |
| 66 | { |
| 67 | if (png_ptr != NULL && info_ptr != NULL) |
| 68 | { |
| 69 | return info_ptr->color_type; |
| 70 | } |
| 71 | return (0); |
| 72 | } |
| 73 | |
| 74 | png_byte |
| 75 | png_get_filter_type(png_structp png_ptr, png_infop info_ptr) |
| 76 | { |
| 77 | if (png_ptr != NULL && info_ptr != NULL) |
| 78 | { |
| 79 | return info_ptr->filter_type; |
| 80 | } |
| 81 | return (0); |
| 82 | } |
| 83 | |
| 84 | png_byte |
| 85 | png_get_interlace_type(png_structp png_ptr, png_infop info_ptr) |
| 86 | { |
| 87 | if (png_ptr != NULL && info_ptr != NULL) |
| 88 | { |
| 89 | return info_ptr->interlace_type; |
| 90 | } |
| 91 | return (0); |
| 92 | } |
| 93 | |
| 94 | png_byte |
| 95 | png_get_compression_type(png_structp png_ptr, png_infop info_ptr) |
| 96 | { |
| 97 | if (png_ptr != NULL && info_ptr != NULL) |
| 98 | { |
| 99 | return info_ptr->compression_type; |
| 100 | } |
| 101 | return (0); |
| 102 | } |
| 103 | |
| 104 | png_uint_32 |
| 105 | png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
| 106 | { |
| 107 | #if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) |
| 108 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) |
| 109 | { |
| 110 | png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter"); |
| 111 | if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER) |
| 112 | return (0); |
| 113 | else return (info_ptr->x_pixels_per_unit); |
| 114 | } |
| 115 | else |
| 116 | #endif |
| 117 | return (0); |
| 118 | } |
| 119 | |
| 120 | png_uint_32 |
| 121 | png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
| 122 | { |
| 123 | #if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) |
| 124 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) |
| 125 | { |
| 126 | png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter"); |
| 127 | if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER) |
| 128 | return (0); |
| 129 | else return (info_ptr->y_pixels_per_unit); |
| 130 | } |
| 131 | else |
| 132 | #endif |
| 133 | return (0); |
| 134 | } |
| 135 | |
| 136 | png_uint_32 |
| 137 | png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
| 138 | { |
| 139 | #if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) |
| 140 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) |
| 141 | { |
| 142 | png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter"); |
| 143 | if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER || |
| 144 | info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit) |
| 145 | return (0); |
| 146 | else return (info_ptr->x_pixels_per_unit); |
| 147 | } |
| 148 | else |
| 149 | #endif |
| 150 | return (0); |
| 151 | } |
| 152 | |
| 153 | float |
| 154 | png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr) |
| 155 | { |
| 156 | #if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) |
| 157 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) |
| 158 | { |
| 159 | png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio"); |
| 160 | if (info_ptr->x_pixels_per_unit == 0) |
| 161 | return ((float)0.0); |
| 162 | else |
| 163 | return ((float)info_ptr->y_pixels_per_unit |
| 164 | /(float)info_ptr->x_pixels_per_unit); |
| 165 | } |
| 166 | else |
| 167 | #endif |
| 168 | return ((float)0.0); |
| 169 | } |
| 170 | |
| 171 | png_uint_32 |
| 172 | png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr) |
| 173 | { |
| 174 | #if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED) |
| 175 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) |
| 176 | { |
| 177 | png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns"); |
| 178 | if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) |
| 179 | return (0); |
| 180 | else return (info_ptr->x_offset); |
| 181 | } |
| 182 | else |
| 183 | #endif |
| 184 | return (0); |
| 185 | } |
| 186 | |
| 187 | png_uint_32 |
| 188 | png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr) |
| 189 | { |
| 190 | #if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED) |
| 191 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) |
| 192 | { |
| 193 | png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns"); |
| 194 | if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) |
| 195 | return (0); |
| 196 | else return (info_ptr->y_offset); |
| 197 | } |
| 198 | else |
| 199 | #endif |
| 200 | return (0); |
| 201 | } |
| 202 | |
| 203 | png_uint_32 |
| 204 | png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr) |
| 205 | { |
| 206 | #if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED) |
| 207 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) |
| 208 | { |
| 209 | png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns"); |
| 210 | if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) |
| 211 | return (0); |
| 212 | else return (info_ptr->x_offset); |
| 213 | } |
| 214 | else |
| 215 | #endif |
| 216 | return (0); |
| 217 | } |
| 218 | |
| 219 | png_uint_32 |
| 220 | png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr) |
| 221 | { |
| 222 | #if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED) |
| 223 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) |
| 224 | { |
| 225 | png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns"); |
| 226 | if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) |
| 227 | return (0); |
| 228 | else return (info_ptr->y_offset); |
| 229 | } |
| 230 | else |
| 231 | #endif |
| 232 | return (0); |
| 233 | } |
| 234 | |
| 235 | #ifdef PNG_INCH_CONVERSIONS |
| 236 | png_uint_32 |
| 237 | png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
| 238 | { |
| 239 | return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr) |
| 240 | *.03937 +.5) |
| 241 | } |
| 242 | |
| 243 | png_uint_32 |
| 244 | png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
| 245 | { |
| 246 | return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr) |
| 247 | *.03937 +.5) |
| 248 | } |
| 249 | |
| 250 | png_uint_32 |
| 251 | png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
| 252 | { |
| 253 | return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr) |
| 254 | *.03937 +.5) |
| 255 | } |
| 256 | |
| 257 | float |
| 258 | png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr) |
| 259 | { |
| 260 | return ((float)png_get_x_offset_microns(png_ptr, info_ptr) |
| 261 | *.03937/1000000. +.5) |
| 262 | } |
| 263 | |
| 264 | float |
| 265 | png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr) |
| 266 | { |
| 267 | return ((float)png_get_y_offset_microns(png_ptr, info_ptr) |
| 268 | *.03937/1000000. +.5) |
| 269 | } |
| 270 | |
| 271 | #if defined(PNG_READ_pHYs_SUPPORTED) |
| 272 | png_uint_32 |
| 273 | png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, |
| 274 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) |
| 275 | { |
| 276 | png_uint_32 retval = 0; |
| 277 | |
| 278 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs) |
| 279 | { |
| 280 | png_debug1(1, "in %s retrieval function\n", "pHYs"); |
| 281 | if (res_x != NULL) |
| 282 | { |
| 283 | *res_x = info_ptr->x_pixels_per_unit; |
| 284 | retval |= PNG_INFO_pHYs; |
| 285 | } |
| 286 | if (res_y != NULL) |
| 287 | { |
| 288 | *res_y = info_ptr->y_pixels_per_unit; |
| 289 | retval |= PNG_INFO_pHYs; |
| 290 | } |
| 291 | if (unit_type != NULL) |
| 292 | { |
| 293 | *unit_type = (int)info_ptr->phys_unit_type; |
| 294 | retval |= PNG_INFO_pHYs; |
| 295 | if(unit_type == 1) |
| 296 | { |
| 297 | if (res_x != NULL) *res_x = (png_uint_32)(*res_x * 39.37 + .50); |
| 298 | if (res_y != NULL) *res_y = (png_uint_32)(*res_y * 39.37 + .50); |
| 299 | } |
| 300 | } |
| 301 | } |
| 302 | return (retval); |
| 303 | } |
| 304 | #endif /* PNG_READ_pHYs_SUPPORTED */ |
| 305 | #endif /* PNG_INCH_CONVERSIONS */ |
| 306 | |
| 307 | /* png_get_channels really belongs in here, too, but it's been around longer */ |
| 308 | |
| 309 | #endif /* PNG_EASY_ACCESS_SUPPORTED */ |
| 310 | |
| 311 | png_byte |
| 312 | png_get_channels(png_structp png_ptr, png_infop info_ptr) |
| 313 | { |
| 314 | if (png_ptr != NULL && info_ptr != NULL) |
| 315 | return(info_ptr->channels); |
| 316 | else |
| 317 | return (0); |
| 318 | } |
| 319 | |
| 320 | png_bytep |
| 321 | png_get_signature(png_structp png_ptr, png_infop info_ptr) |
| 322 | { |
| 323 | if (png_ptr != NULL && info_ptr != NULL) |
| 324 | return(info_ptr->signature); |
| 325 | else |
| 326 | return (NULL); |
| 327 | } |
| 328 | |
| 329 | #if defined(PNG_READ_bKGD_SUPPORTED) |
| 330 | png_uint_32 |
| 331 | png_get_bKGD(png_structp png_ptr, png_infop info_ptr, |
| 332 | png_color_16p *background) |
| 333 | { |
| 334 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) |
| 335 | && background != NULL) |
| 336 | { |
| 337 | png_debug1(1, "in %s retrieval function\n", "bKGD"); |
| 338 | *background = &(info_ptr->background); |
| 339 | return (PNG_INFO_bKGD); |
| 340 | } |
| 341 | return (0); |
| 342 | } |
| 343 | #endif |
| 344 | |
| 345 | #if defined(PNG_READ_cHRM_SUPPORTED) |
| 346 | png_uint_32 |
| 347 | png_get_cHRM(png_structp png_ptr, png_infop info_ptr, |
| 348 | double *white_x, double *white_y, double *red_x, double *red_y, |
| 349 | double *green_x, double *green_y, double *blue_x, double *blue_y) |
| 350 | { |
| 351 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) |
| 352 | { |
| 353 | png_debug1(1, "in %s retrieval function\n", "cHRM"); |
| 354 | if (white_x != NULL) |
| 355 | *white_x = (double)info_ptr->x_white; |
| 356 | if (white_y != NULL) |
| 357 | *white_y = (double)info_ptr->y_white; |
| 358 | if (red_x != NULL) |
| 359 | *red_x = (double)info_ptr->x_red; |
| 360 | if (red_y != NULL) |
| 361 | *red_y = (double)info_ptr->y_red; |
| 362 | if (green_x != NULL) |
| 363 | *green_x = (double)info_ptr->x_green; |
| 364 | if (green_y != NULL) |
| 365 | *green_y = (double)info_ptr->y_green; |
| 366 | if (blue_x != NULL) |
| 367 | *blue_x = (double)info_ptr->x_blue; |
| 368 | if (blue_y != NULL) |
| 369 | *blue_y = (double)info_ptr->y_blue; |
| 370 | return (PNG_INFO_cHRM); |
| 371 | } |
| 372 | return (0); |
| 373 | } |
| 374 | #endif |
| 375 | |
| 376 | #if defined(PNG_READ_gAMA_SUPPORTED) |
| 377 | png_uint_32 |
| 378 | png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma) |
| 379 | { |
| 380 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) |
| 381 | && file_gamma != NULL) |
| 382 | { |
| 383 | png_debug1(1, "in %s retrieval function\n", "gAMA"); |
| 384 | *file_gamma = (double)info_ptr->gamma; |
| 385 | return (PNG_INFO_gAMA); |
| 386 | } |
| 387 | return (0); |
| 388 | } |
| 389 | #endif |
| 390 | |
| 391 | #if defined(PNG_READ_sRGB_SUPPORTED) |
| 392 | png_uint_32 |
| 393 | png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent) |
| 394 | { |
| 395 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) |
| 396 | && file_srgb_intent != NULL) |
| 397 | { |
| 398 | png_debug1(1, "in %s retrieval function\n", "sRGB"); |
| 399 | *file_srgb_intent = (int)info_ptr->srgb_intent; |
| 400 | return (PNG_INFO_sRGB); |
| 401 | } |
| 402 | return (0); |
| 403 | } |
| 404 | #endif |
| 405 | |
| 406 | #if defined(PNG_READ_hIST_SUPPORTED) |
| 407 | png_uint_32 |
| 408 | png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist) |
| 409 | { |
| 410 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) |
| 411 | && hist != NULL) |
| 412 | { |
| 413 | png_debug1(1, "in %s retrieval function\n", "hIST"); |
| 414 | *hist = info_ptr->hist; |
| 415 | return (PNG_INFO_hIST); |
| 416 | } |
| 417 | return (0); |
| 418 | } |
| 419 | #endif |
| 420 | |
| 421 | png_uint_32 |
| 422 | png_get_IHDR(png_structp png_ptr, png_infop info_ptr, |
| 423 | png_uint_32 *width, png_uint_32 *height, int *bit_depth, |
| 424 | int *color_type, int *interlace_type, int *compression_type, |
| 425 | int *filter_type) |
| 426 | |
| 427 | { |
| 428 | if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL && |
| 429 | bit_depth != NULL && color_type != NULL) |
| 430 | { |
| 431 | int pixel_depth, channels; |
| 432 | png_uint_32 rowbytes_per_pixel; |
| 433 | |
| 434 | png_debug1(1, "in %s retrieval function\n", "IHDR"); |
| 435 | *width = info_ptr->width; |
| 436 | *height = info_ptr->height; |
| 437 | *bit_depth = info_ptr->bit_depth; |
| 438 | *color_type = info_ptr->color_type; |
| 439 | if (compression_type != NULL) |
| 440 | *compression_type = info_ptr->compression_type; |
| 441 | if (filter_type != NULL) |
| 442 | *filter_type = info_ptr->filter_type; |
| 443 | if (interlace_type != NULL) |
| 444 | *interlace_type = info_ptr->interlace_type; |
| 445 | |
| 446 | /* check for potential overflow of rowbytes */ |
| 447 | if (*color_type == PNG_COLOR_TYPE_PALETTE) |
| 448 | channels = 1; |
| 449 | else if (*color_type & PNG_COLOR_MASK_COLOR) |
| 450 | channels = 3; |
| 451 | else |
| 452 | channels = 1; |
| 453 | if (*color_type & PNG_COLOR_MASK_ALPHA) |
| 454 | channels++; |
| 455 | pixel_depth = *bit_depth * channels; |
| 456 | rowbytes_per_pixel = (pixel_depth + 7) >> 3; |
| 457 | if ((*width > (png_uint_32)2147483647L/rowbytes_per_pixel)) |
| 458 | { |
| 459 | png_warning(png_ptr, |
| 460 | "Width too large for libpng to process image data."); |
| 461 | } |
| 462 | return (1); |
| 463 | } |
| 464 | return (0); |
| 465 | } |
| 466 | |
| 467 | #if defined(PNG_READ_oFFs_SUPPORTED) |
| 468 | png_uint_32 |
| 469 | png_get_oFFs(png_structp png_ptr, png_infop info_ptr, |
| 470 | png_uint_32 *offset_x, png_uint_32 *offset_y, int *unit_type) |
| 471 | { |
| 472 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) |
| 473 | && offset_x != NULL && offset_y != NULL && unit_type != NULL) |
| 474 | { |
| 475 | png_debug1(1, "in %s retrieval function\n", "oFFs"); |
| 476 | *offset_x = info_ptr->x_offset; |
| 477 | *offset_y = info_ptr->y_offset; |
| 478 | *unit_type = (int)info_ptr->offset_unit_type; |
| 479 | return (PNG_INFO_oFFs); |
| 480 | } |
| 481 | return (0); |
| 482 | } |
| 483 | #endif |
| 484 | |
| 485 | #if defined(PNG_READ_pCAL_SUPPORTED) |
| 486 | png_uint_32 |
| 487 | png_get_pCAL(png_structp png_ptr, png_infop info_ptr, |
| 488 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, |
| 489 | png_charp *units, png_charpp *params) |
| 490 | { |
| 491 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pCAL && |
| 492 | purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && |
| 493 | nparams != NULL && units != NULL && params != NULL) |
| 494 | { |
| 495 | png_debug1(1, "in %s retrieval function\n", "pCAL"); |
| 496 | *purpose = info_ptr->pcal_purpose; |
| 497 | *X0 = info_ptr->pcal_X0; |
| 498 | *X1 = info_ptr->pcal_X1; |
| 499 | *type = (int)info_ptr->pcal_type; |
| 500 | *nparams = (int)info_ptr->pcal_nparams; |
| 501 | *units = info_ptr->pcal_units; |
| 502 | *params = info_ptr->pcal_params; |
| 503 | return (PNG_INFO_pCAL); |
| 504 | } |
| 505 | return (0); |
| 506 | } |
| 507 | #endif |
| 508 | |
| 509 | #if defined(PNG_READ_pHYs_SUPPORTED) |
| 510 | png_uint_32 |
| 511 | png_get_pHYs(png_structp png_ptr, png_infop info_ptr, |
| 512 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) |
| 513 | { |
| 514 | png_uint_32 retval = 0; |
| 515 | |
| 516 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs) |
| 517 | { |
| 518 | png_debug1(1, "in %s retrieval function\n", "pHYs"); |
| 519 | if (res_x != NULL) |
| 520 | { |
| 521 | *res_x = info_ptr->x_pixels_per_unit; |
| 522 | retval |= PNG_INFO_pHYs; |
| 523 | } |
| 524 | if (res_y != NULL) |
| 525 | { |
| 526 | *res_y = info_ptr->y_pixels_per_unit; |
| 527 | retval |= PNG_INFO_pHYs; |
| 528 | } |
| 529 | if (unit_type != NULL) |
| 530 | { |
| 531 | *unit_type = (int)info_ptr->phys_unit_type; |
| 532 | retval |= PNG_INFO_pHYs; |
| 533 | } |
| 534 | } |
| 535 | return (retval); |
| 536 | } |
| 537 | #endif |
| 538 | |
| 539 | png_uint_32 |
| 540 | png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette, |
| 541 | int *num_palette) |
| 542 | { |
| 543 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_PLTE && |
| 544 | palette != NULL) |
| 545 | { |
| 546 | png_debug1(1, "in %s retrieval function\n", "PLTE"); |
| 547 | *palette = info_ptr->palette; |
| 548 | *num_palette = info_ptr->num_palette; |
| 549 | png_debug1(3, "num_palette = %d\n", *num_palette); |
| 550 | return (PNG_INFO_PLTE); |
| 551 | } |
| 552 | return (0); |
| 553 | } |
| 554 | |
| 555 | #if defined(PNG_READ_sBIT_SUPPORTED) |
| 556 | png_uint_32 |
| 557 | png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit) |
| 558 | { |
| 559 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_sBIT && |
| 560 | sig_bit != NULL) |
| 561 | { |
| 562 | png_debug1(1, "in %s retrieval function\n", "sBIT"); |
| 563 | *sig_bit = &(info_ptr->sig_bit); |
| 564 | return (PNG_INFO_sBIT); |
| 565 | } |
| 566 | return (0); |
| 567 | } |
| 568 | #endif |
| 569 | |
| 570 | #if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED) |
| 571 | png_uint_32 |
| 572 | png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, |
| 573 | int *num_text) |
| 574 | { |
| 575 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) |
| 576 | { |
| 577 | png_debug1(1, "in %s retrieval function\n", |
| 578 | (png_ptr->chunk_name[0] == '\0' ? "text" |
| 579 | : (png_const_charp)png_ptr->chunk_name)); |
| 580 | if (text_ptr != NULL) |
| 581 | *text_ptr = info_ptr->text; |
| 582 | if (num_text != NULL) |
| 583 | *num_text = info_ptr->num_text; |
| 584 | return ((png_uint_32)info_ptr->num_text); |
| 585 | } |
| 586 | return(0); |
| 587 | } |
| 588 | #endif |
| 589 | |
| 590 | #if defined(PNG_READ_tIME_SUPPORTED) |
| 591 | png_uint_32 |
| 592 | png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time) |
| 593 | { |
| 594 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_tIME && |
| 595 | mod_time != NULL) |
| 596 | { |
| 597 | png_debug1(1, "in %s retrieval function\n", "tIME"); |
| 598 | *mod_time = &(info_ptr->mod_time); |
| 599 | return (PNG_INFO_tIME); |
| 600 | } |
| 601 | return (0); |
| 602 | } |
| 603 | #endif |
| 604 | |
| 605 | #if defined(PNG_READ_tRNS_SUPPORTED) |
| 606 | png_uint_32 |
| 607 | png_get_tRNS(png_structp png_ptr, png_infop info_ptr, |
| 608 | png_bytep *trans, int *num_trans, png_color_16p *trans_values) |
| 609 | { |
| 610 | png_uint_32 retval = 0; |
| 611 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_tRNS) |
| 612 | { |
| 613 | png_debug1(1, "in %s retrieval function\n", "tRNS"); |
| 614 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
| 615 | { |
| 616 | if (trans != NULL) |
| 617 | { |
| 618 | *trans = info_ptr->trans; |
| 619 | retval |= PNG_INFO_tRNS; |
| 620 | } |
| 621 | if (trans_values != NULL) |
| 622 | *trans_values = &(info_ptr->trans_values); |
| 623 | } |
| 624 | else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ |
| 625 | { |
| 626 | if (trans_values != NULL) |
| 627 | { |
| 628 | *trans_values = &(info_ptr->trans_values); |
| 629 | retval |= PNG_INFO_tRNS; |
| 630 | } |
| 631 | if(trans != NULL) |
| 632 | *trans = NULL; |
| 633 | } |
| 634 | if(num_trans != NULL) |
| 635 | { |
| 636 | *num_trans = info_ptr->num_trans; |
| 637 | retval |= PNG_INFO_tRNS; |
| 638 | } |
| 639 | } |
| 640 | return (retval); |
| 641 | } |
| 642 | #endif |
| 643 | |
| 644 | #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) |
| 645 | png_byte |
| 646 | png_get_rgb_to_gray_status (png_structp png_ptr) |
| 647 | { |
| 648 | return png_ptr->rgb_to_gray_status; |
| 649 | } |
| 650 | #endif |