| 1 |
|
| 2 |
/* pngget.c - retrieval of values from info struct |
| 3 |
* |
| 4 |
* Last changed in libpng 1.2.37 [June 4, 2009] |
| 5 |
* Copyright (c) 1998-2009 Glenn Randers-Pehrson |
| 6 |
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 7 |
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
| 8 |
* |
| 9 |
* This code is released under the libpng license. |
| 10 |
* For conditions of distribution and use, see the disclaimer |
| 11 |
* and license in png.h |
| 12 |
* |
| 13 |
*/ |
| 14 |
|
| 15 |
#define PNG_INTERNAL |
| 16 |
#include "png.h" |
| 17 |
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| 18 |
|
| 19 |
png_uint_32 PNGAPI |
| 20 |
png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag) |
| 21 |
{ |
| 22 |
if (png_ptr != NULL && info_ptr != NULL) |
| 23 |
return(info_ptr->valid & flag); |
| 24 |
|
| 25 |
else |
| 26 |
return(0); |
| 27 |
} |
| 28 |
|
| 29 |
png_uint_32 PNGAPI |
| 30 |
png_get_rowbytes(png_structp png_ptr, png_infop info_ptr) |
| 31 |
{ |
| 32 |
if (png_ptr != NULL && info_ptr != NULL) |
| 33 |
return(info_ptr->rowbytes); |
| 34 |
|
| 35 |
else |
| 36 |
return(0); |
| 37 |
} |
| 38 |
|
| 39 |
#if defined(PNG_INFO_IMAGE_SUPPORTED) |
| 40 |
png_bytepp PNGAPI |
| 41 |
png_get_rows(png_structp png_ptr, png_infop info_ptr) |
| 42 |
{ |
| 43 |
if (png_ptr != NULL && info_ptr != NULL) |
| 44 |
return(info_ptr->row_pointers); |
| 45 |
|
| 46 |
else |
| 47 |
return(0); |
| 48 |
} |
| 49 |
#endif |
| 50 |
|
| 51 |
#ifdef PNG_EASY_ACCESS_SUPPORTED |
| 52 |
/* Easy access to info, added in libpng-0.99 */ |
| 53 |
png_uint_32 PNGAPI |
| 54 |
png_get_image_width(png_structp png_ptr, png_infop info_ptr) |
| 55 |
{ |
| 56 |
if (png_ptr != NULL && info_ptr != NULL) |
| 57 |
return info_ptr->width; |
| 58 |
|
| 59 |
return (0); |
| 60 |
} |
| 61 |
|
| 62 |
png_uint_32 PNGAPI |
| 63 |
png_get_image_height(png_structp png_ptr, png_infop info_ptr) |
| 64 |
{ |
| 65 |
if (png_ptr != NULL && info_ptr != NULL) |
| 66 |
return info_ptr->height; |
| 67 |
|
| 68 |
return (0); |
| 69 |
} |
| 70 |
|
| 71 |
png_byte PNGAPI |
| 72 |
png_get_bit_depth(png_structp png_ptr, png_infop info_ptr) |
| 73 |
{ |
| 74 |
if (png_ptr != NULL && info_ptr != NULL) |
| 75 |
return info_ptr->bit_depth; |
| 76 |
|
| 77 |
return (0); |
| 78 |
} |
| 79 |
|
| 80 |
png_byte PNGAPI |
| 81 |
png_get_color_type(png_structp png_ptr, png_infop info_ptr) |
| 82 |
{ |
| 83 |
if (png_ptr != NULL && info_ptr != NULL) |
| 84 |
return info_ptr->color_type; |
| 85 |
|
| 86 |
return (0); |
| 87 |
} |
| 88 |
|
| 89 |
png_byte PNGAPI |
| 90 |
png_get_filter_type(png_structp png_ptr, png_infop info_ptr) |
| 91 |
{ |
| 92 |
if (png_ptr != NULL && info_ptr != NULL) |
| 93 |
return info_ptr->filter_type; |
| 94 |
|
| 95 |
return (0); |
| 96 |
} |
| 97 |
|
| 98 |
png_byte PNGAPI |
| 99 |
png_get_interlace_type(png_structp png_ptr, png_infop info_ptr) |
| 100 |
{ |
| 101 |
if (png_ptr != NULL && info_ptr != NULL) |
| 102 |
return info_ptr->interlace_type; |
| 103 |
|
| 104 |
return (0); |
| 105 |
} |
| 106 |
|
| 107 |
png_byte PNGAPI |
| 108 |
png_get_compression_type(png_structp png_ptr, png_infop info_ptr) |
| 109 |
{ |
| 110 |
if (png_ptr != NULL && info_ptr != NULL) |
| 111 |
return info_ptr->compression_type; |
| 112 |
|
| 113 |
return (0); |
| 114 |
} |
| 115 |
|
| 116 |
png_uint_32 PNGAPI |
| 117 |
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
| 118 |
{ |
| 119 |
if (png_ptr != NULL && info_ptr != NULL) |
| 120 |
#if defined(PNG_pHYs_SUPPORTED) |
| 121 |
if (info_ptr->valid & PNG_INFO_pHYs) |
| 122 |
{ |
| 123 |
png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter"); |
| 124 |
|
| 125 |
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER) |
| 126 |
return (0); |
| 127 |
|
| 128 |
else |
| 129 |
return (info_ptr->x_pixels_per_unit); |
| 130 |
} |
| 131 |
#else |
| 132 |
return (0); |
| 133 |
#endif |
| 134 |
return (0); |
| 135 |
} |
| 136 |
|
| 137 |
png_uint_32 PNGAPI |
| 138 |
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
| 139 |
{ |
| 140 |
if (png_ptr != NULL && info_ptr != NULL) |
| 141 |
#if defined(PNG_pHYs_SUPPORTED) |
| 142 |
if (info_ptr->valid & PNG_INFO_pHYs) |
| 143 |
{ |
| 144 |
png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter"); |
| 145 |
|
| 146 |
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER) |
| 147 |
return (0); |
| 148 |
|
| 149 |
else |
| 150 |
return (info_ptr->y_pixels_per_unit); |
| 151 |
} |
| 152 |
#else |
| 153 |
return (0); |
| 154 |
#endif |
| 155 |
return (0); |
| 156 |
} |
| 157 |
|
| 158 |
png_uint_32 PNGAPI |
| 159 |
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
| 160 |
{ |
| 161 |
if (png_ptr != NULL && info_ptr != NULL) |
| 162 |
#if defined(PNG_pHYs_SUPPORTED) |
| 163 |
if (info_ptr->valid & PNG_INFO_pHYs) |
| 164 |
{ |
| 165 |
png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter"); |
| 166 |
|
| 167 |
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER || |
| 168 |
info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit) |
| 169 |
return (0); |
| 170 |
|
| 171 |
else |
| 172 |
return (info_ptr->x_pixels_per_unit); |
| 173 |
} |
| 174 |
#else |
| 175 |
return (0); |
| 176 |
#endif |
| 177 |
return (0); |
| 178 |
} |
| 179 |
|
| 180 |
#ifdef PNG_FLOATING_POINT_SUPPORTED |
| 181 |
float PNGAPI |
| 182 |
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr) |
| 183 |
{ |
| 184 |
if (png_ptr != NULL && info_ptr != NULL) |
| 185 |
#if defined(PNG_pHYs_SUPPORTED) |
| 186 |
|
| 187 |
if (info_ptr->valid & PNG_INFO_pHYs) |
| 188 |
{ |
| 189 |
png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio"); |
| 190 |
if (info_ptr->x_pixels_per_unit == 0) |
| 191 |
return ((float)0.0); |
| 192 |
else |
| 193 |
return ((float)((float)info_ptr->y_pixels_per_unit |
| 194 |
/(float)info_ptr->x_pixels_per_unit)); |
| 195 |
} |
| 196 |
#else |
| 197 |
return (0.0); |
| 198 |
#endif |
| 199 |
return ((float)0.0); |
| 200 |
} |
| 201 |
#endif |
| 202 |
|
| 203 |
png_int_32 PNGAPI |
| 204 |
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr) |
| 205 |
{ |
| 206 |
if (png_ptr != NULL && info_ptr != NULL) |
| 207 |
#if defined(PNG_oFFs_SUPPORTED) |
| 208 |
|
| 209 |
if (info_ptr->valid & PNG_INFO_oFFs) |
| 210 |
{ |
| 211 |
png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns"); |
| 212 |
|
| 213 |
if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) |
| 214 |
return (0); |
| 215 |
|
| 216 |
else |
| 217 |
return (info_ptr->x_offset); |
| 218 |
} |
| 219 |
#else |
| 220 |
return (0); |
| 221 |
#endif |
| 222 |
return (0); |
| 223 |
} |
| 224 |
|
| 225 |
png_int_32 PNGAPI |
| 226 |
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr) |
| 227 |
{ |
| 228 |
if (png_ptr != NULL && info_ptr != NULL) |
| 229 |
|
| 230 |
#if defined(PNG_oFFs_SUPPORTED) |
| 231 |
if (info_ptr->valid & PNG_INFO_oFFs) |
| 232 |
{ |
| 233 |
png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns"); |
| 234 |
|
| 235 |
if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) |
| 236 |
return (0); |
| 237 |
|
| 238 |
else |
| 239 |
return (info_ptr->y_offset); |
| 240 |
} |
| 241 |
#else |
| 242 |
return (0); |
| 243 |
#endif |
| 244 |
return (0); |
| 245 |
} |
| 246 |
|
| 247 |
png_int_32 PNGAPI |
| 248 |
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr) |
| 249 |
{ |
| 250 |
if (png_ptr != NULL && info_ptr != NULL) |
| 251 |
|
| 252 |
#if defined(PNG_oFFs_SUPPORTED) |
| 253 |
if (info_ptr->valid & PNG_INFO_oFFs) |
| 254 |
{ |
| 255 |
png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns"); |
| 256 |
|
| 257 |
if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) |
| 258 |
return (0); |
| 259 |
|
| 260 |
else |
| 261 |
return (info_ptr->x_offset); |
| 262 |
} |
| 263 |
#else |
| 264 |
return (0); |
| 265 |
#endif |
| 266 |
return (0); |
| 267 |
} |
| 268 |
|
| 269 |
png_int_32 PNGAPI |
| 270 |
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr) |
| 271 |
{ |
| 272 |
if (png_ptr != NULL && info_ptr != NULL) |
| 273 |
|
| 274 |
#if defined(PNG_oFFs_SUPPORTED) |
| 275 |
if (info_ptr->valid & PNG_INFO_oFFs) |
| 276 |
{ |
| 277 |
png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns"); |
| 278 |
|
| 279 |
if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) |
| 280 |
return (0); |
| 281 |
|
| 282 |
else |
| 283 |
return (info_ptr->y_offset); |
| 284 |
} |
| 285 |
#else |
| 286 |
return (0); |
| 287 |
#endif |
| 288 |
return (0); |
| 289 |
} |
| 290 |
|
| 291 |
#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) |
| 292 |
png_uint_32 PNGAPI |
| 293 |
png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
| 294 |
{ |
| 295 |
return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr) |
| 296 |
*.0254 +.5)); |
| 297 |
} |
| 298 |
|
| 299 |
png_uint_32 PNGAPI |
| 300 |
png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
| 301 |
{ |
| 302 |
return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr) |
| 303 |
*.0254 +.5)); |
| 304 |
} |
| 305 |
|
| 306 |
png_uint_32 PNGAPI |
| 307 |
png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
| 308 |
{ |
| 309 |
return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr) |
| 310 |
*.0254 +.5)); |
| 311 |
} |
| 312 |
|
| 313 |
float PNGAPI |
| 314 |
png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr) |
| 315 |
{ |
| 316 |
return ((float)png_get_x_offset_microns(png_ptr, info_ptr) |
| 317 |
*.00003937); |
| 318 |
} |
| 319 |
|
| 320 |
float PNGAPI |
| 321 |
png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr) |
| 322 |
{ |
| 323 |
return ((float)png_get_y_offset_microns(png_ptr, info_ptr) |
| 324 |
*.00003937); |
| 325 |
} |
| 326 |
|
| 327 |
#if defined(PNG_pHYs_SUPPORTED) |
| 328 |
png_uint_32 PNGAPI |
| 329 |
png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, |
| 330 |
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) |
| 331 |
{ |
| 332 |
png_uint_32 retval = 0; |
| 333 |
|
| 334 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) |
| 335 |
{ |
| 336 |
png_debug1(1, "in %s retrieval function", "pHYs"); |
| 337 |
if (res_x != NULL) |
| 338 |
{ |
| 339 |
*res_x = info_ptr->x_pixels_per_unit; |
| 340 |
retval |= PNG_INFO_pHYs; |
| 341 |
} |
| 342 |
if (res_y != NULL) |
| 343 |
{ |
| 344 |
*res_y = info_ptr->y_pixels_per_unit; |
| 345 |
retval |= PNG_INFO_pHYs; |
| 346 |
} |
| 347 |
if (unit_type != NULL) |
| 348 |
{ |
| 349 |
*unit_type = (int)info_ptr->phys_unit_type; |
| 350 |
retval |= PNG_INFO_pHYs; |
| 351 |
if (*unit_type == 1) |
| 352 |
{ |
| 353 |
if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50); |
| 354 |
if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50); |
| 355 |
} |
| 356 |
} |
| 357 |
} |
| 358 |
return (retval); |
| 359 |
} |
| 360 |
#endif /* PNG_pHYs_SUPPORTED */ |
| 361 |
#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ |
| 362 |
|
| 363 |
/* png_get_channels really belongs in here, too, but it's been around longer */ |
| 364 |
|
| 365 |
#endif /* PNG_EASY_ACCESS_SUPPORTED */ |
| 366 |
|
| 367 |
png_byte PNGAPI |
| 368 |
png_get_channels(png_structp png_ptr, png_infop info_ptr) |
| 369 |
{ |
| 370 |
if (png_ptr != NULL && info_ptr != NULL) |
| 371 |
return(info_ptr->channels); |
| 372 |
else |
| 373 |
return (0); |
| 374 |
} |
| 375 |
|
| 376 |
png_bytep PNGAPI |
| 377 |
png_get_signature(png_structp png_ptr, png_infop info_ptr) |
| 378 |
{ |
| 379 |
if (png_ptr != NULL && info_ptr != NULL) |
| 380 |
return(info_ptr->signature); |
| 381 |
else |
| 382 |
return (NULL); |
| 383 |
} |
| 384 |
|
| 385 |
#if defined(PNG_bKGD_SUPPORTED) |
| 386 |
png_uint_32 PNGAPI |
| 387 |
png_get_bKGD(png_structp png_ptr, png_infop info_ptr, |
| 388 |
png_color_16p *background) |
| 389 |
{ |
| 390 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) |
| 391 |
&& background != NULL) |
| 392 |
{ |
| 393 |
png_debug1(1, "in %s retrieval function", "bKGD"); |
| 394 |
*background = &(info_ptr->background); |
| 395 |
return (PNG_INFO_bKGD); |
| 396 |
} |
| 397 |
return (0); |
| 398 |
} |
| 399 |
#endif |
| 400 |
|
| 401 |
#if defined(PNG_cHRM_SUPPORTED) |
| 402 |
#ifdef PNG_FLOATING_POINT_SUPPORTED |
| 403 |
png_uint_32 PNGAPI |
| 404 |
png_get_cHRM(png_structp png_ptr, png_infop info_ptr, |
| 405 |
double *white_x, double *white_y, double *red_x, double *red_y, |
| 406 |
double *green_x, double *green_y, double *blue_x, double *blue_y) |
| 407 |
{ |
| 408 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) |
| 409 |
{ |
| 410 |
png_debug1(1, "in %s retrieval function", "cHRM"); |
| 411 |
if (white_x != NULL) |
| 412 |
*white_x = (double)info_ptr->x_white; |
| 413 |
if (white_y != NULL) |
| 414 |
*white_y = (double)info_ptr->y_white; |
| 415 |
if (red_x != NULL) |
| 416 |
*red_x = (double)info_ptr->x_red; |
| 417 |
if (red_y != NULL) |
| 418 |
*red_y = (double)info_ptr->y_red; |
| 419 |
if (green_x != NULL) |
| 420 |
*green_x = (double)info_ptr->x_green; |
| 421 |
if (green_y != NULL) |
| 422 |
*green_y = (double)info_ptr->y_green; |
| 423 |
if (blue_x != NULL) |
| 424 |
*blue_x = (double)info_ptr->x_blue; |
| 425 |
if (blue_y != NULL) |
| 426 |
*blue_y = (double)info_ptr->y_blue; |
| 427 |
return (PNG_INFO_cHRM); |
| 428 |
} |
| 429 |
return (0); |
| 430 |
} |
| 431 |
#endif |
| 432 |
#ifdef PNG_FIXED_POINT_SUPPORTED |
| 433 |
png_uint_32 PNGAPI |
| 434 |
png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, |
| 435 |
png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, |
| 436 |
png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, |
| 437 |
png_fixed_point *blue_x, png_fixed_point *blue_y) |
| 438 |
{ |
| 439 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) |
| 440 |
{ |
| 441 |
png_debug1(1, "in %s retrieval function", "cHRM"); |
| 442 |
if (white_x != NULL) |
| 443 |
*white_x = info_ptr->int_x_white; |
| 444 |
if (white_y != NULL) |
| 445 |
*white_y = info_ptr->int_y_white; |
| 446 |
if (red_x != NULL) |
| 447 |
*red_x = info_ptr->int_x_red; |
| 448 |
if (red_y != NULL) |
| 449 |
*red_y = info_ptr->int_y_red; |
| 450 |
if (green_x != NULL) |
| 451 |
*green_x = info_ptr->int_x_green; |
| 452 |
if (green_y != NULL) |
| 453 |
*green_y = info_ptr->int_y_green; |
| 454 |
if (blue_x != NULL) |
| 455 |
*blue_x = info_ptr->int_x_blue; |
| 456 |
if (blue_y != NULL) |
| 457 |
*blue_y = info_ptr->int_y_blue; |
| 458 |
return (PNG_INFO_cHRM); |
| 459 |
} |
| 460 |
return (0); |
| 461 |
} |
| 462 |
#endif |
| 463 |
#endif |
| 464 |
|
| 465 |
#if defined(PNG_gAMA_SUPPORTED) |
| 466 |
#ifdef PNG_FLOATING_POINT_SUPPORTED |
| 467 |
png_uint_32 PNGAPI |
| 468 |
png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma) |
| 469 |
{ |
| 470 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) |
| 471 |
&& file_gamma != NULL) |
| 472 |
{ |
| 473 |
png_debug1(1, "in %s retrieval function", "gAMA"); |
| 474 |
*file_gamma = (double)info_ptr->gamma; |
| 475 |
return (PNG_INFO_gAMA); |
| 476 |
} |
| 477 |
return (0); |
| 478 |
} |
| 479 |
#endif |
| 480 |
#ifdef PNG_FIXED_POINT_SUPPORTED |
| 481 |
png_uint_32 PNGAPI |
| 482 |
png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, |
| 483 |
png_fixed_point *int_file_gamma) |
| 484 |
{ |
| 485 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) |
| 486 |
&& int_file_gamma != NULL) |
| 487 |
{ |
| 488 |
png_debug1(1, "in %s retrieval function", "gAMA"); |
| 489 |
*int_file_gamma = info_ptr->int_gamma; |
| 490 |
return (PNG_INFO_gAMA); |
| 491 |
} |
| 492 |
return (0); |
| 493 |
} |
| 494 |
#endif |
| 495 |
#endif |
| 496 |
|
| 497 |
#if defined(PNG_sRGB_SUPPORTED) |
| 498 |
png_uint_32 PNGAPI |
| 499 |
png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent) |
| 500 |
{ |
| 501 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) |
| 502 |
&& file_srgb_intent != NULL) |
| 503 |
{ |
| 504 |
png_debug1(1, "in %s retrieval function", "sRGB"); |
| 505 |
*file_srgb_intent = (int)info_ptr->srgb_intent; |
| 506 |
return (PNG_INFO_sRGB); |
| 507 |
} |
| 508 |
return (0); |
| 509 |
} |
| 510 |
#endif |
| 511 |
|
| 512 |
#if defined(PNG_iCCP_SUPPORTED) |
| 513 |
png_uint_32 PNGAPI |
| 514 |
png_get_iCCP(png_structp png_ptr, png_infop info_ptr, |
| 515 |
png_charpp name, int *compression_type, |
| 516 |
png_charpp profile, png_uint_32 *proflen) |
| 517 |
{ |
| 518 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP) |
| 519 |
&& name != NULL && profile != NULL && proflen != NULL) |
| 520 |
{ |
| 521 |
png_debug1(1, "in %s retrieval function", "iCCP"); |
| 522 |
*name = info_ptr->iccp_name; |
| 523 |
*profile = info_ptr->iccp_profile; |
| 524 |
/* Compression_type is a dummy so the API won't have to change |
| 525 |
* if we introduce multiple compression types later. |
| 526 |
*/ |
| 527 |
*proflen = (int)info_ptr->iccp_proflen; |
| 528 |
*compression_type = (int)info_ptr->iccp_compression; |
| 529 |
return (PNG_INFO_iCCP); |
| 530 |
} |
| 531 |
return (0); |
| 532 |
} |
| 533 |
#endif |
| 534 |
|
| 535 |
#if defined(PNG_sPLT_SUPPORTED) |
| 536 |
png_uint_32 PNGAPI |
| 537 |
png_get_sPLT(png_structp png_ptr, png_infop info_ptr, |
| 538 |
png_sPLT_tpp spalettes) |
| 539 |
{ |
| 540 |
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) |
| 541 |
{ |
| 542 |
*spalettes = info_ptr->splt_palettes; |
| 543 |
return ((png_uint_32)info_ptr->splt_palettes_num); |
| 544 |
} |
| 545 |
return (0); |
| 546 |
} |
| 547 |
#endif |
| 548 |
|
| 549 |
#if defined(PNG_hIST_SUPPORTED) |
| 550 |
png_uint_32 PNGAPI |
| 551 |
png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist) |
| 552 |
{ |
| 553 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) |
| 554 |
&& hist != NULL) |
| 555 |
{ |
| 556 |
png_debug1(1, "in %s retrieval function", "hIST"); |
| 557 |
*hist = info_ptr->hist; |
| 558 |
return (PNG_INFO_hIST); |
| 559 |
} |
| 560 |
return (0); |
| 561 |
} |
| 562 |
#endif |
| 563 |
|
| 564 |
png_uint_32 PNGAPI |
| 565 |
png_get_IHDR(png_structp png_ptr, png_infop info_ptr, |
| 566 |
png_uint_32 *width, png_uint_32 *height, int *bit_depth, |
| 567 |
int *color_type, int *interlace_type, int *compression_type, |
| 568 |
int *filter_type) |
| 569 |
|
| 570 |
{ |
| 571 |
if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL && |
| 572 |
bit_depth != NULL && color_type != NULL) |
| 573 |
{ |
| 574 |
png_debug1(1, "in %s retrieval function", "IHDR"); |
| 575 |
*width = info_ptr->width; |
| 576 |
*height = info_ptr->height; |
| 577 |
*bit_depth = info_ptr->bit_depth; |
| 578 |
if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16) |
| 579 |
png_error(png_ptr, "Invalid bit depth"); |
| 580 |
|
| 581 |
*color_type = info_ptr->color_type; |
| 582 |
|
| 583 |
if (info_ptr->color_type > 6) |
| 584 |
png_error(png_ptr, "Invalid color type"); |
| 585 |
|
| 586 |
if (compression_type != NULL) |
| 587 |
*compression_type = info_ptr->compression_type; |
| 588 |
|
| 589 |
if (filter_type != NULL) |
| 590 |
*filter_type = info_ptr->filter_type; |
| 591 |
|
| 592 |
if (interlace_type != NULL) |
| 593 |
*interlace_type = info_ptr->interlace_type; |
| 594 |
|
| 595 |
/* Check for potential overflow of rowbytes */ |
| 596 |
if (*width == 0 || *width > PNG_UINT_31_MAX) |
| 597 |
png_error(png_ptr, "Invalid image width"); |
| 598 |
|
| 599 |
if (*height == 0 || *height > PNG_UINT_31_MAX) |
| 600 |
png_error(png_ptr, "Invalid image height"); |
| 601 |
|
| 602 |
if (info_ptr->width > (PNG_UINT_32_MAX |
| 603 |
>> 3) /* 8-byte RGBA pixels */ |
| 604 |
- 64 /* bigrowbuf hack */ |
| 605 |
- 1 /* filter byte */ |
| 606 |
- 7*8 /* rounding of width to multiple of 8 pixels */ |
| 607 |
- 8) /* extra max_pixel_depth pad */ |
| 608 |
{ |
| 609 |
png_warning(png_ptr, |
| 610 |
"Width too large for libpng to process image data."); |
| 611 |
} |
| 612 |
|
| 613 |
return (1); |
| 614 |
} |
| 615 |
return (0); |
| 616 |
} |
| 617 |
|
| 618 |
#if defined(PNG_oFFs_SUPPORTED) |
| 619 |
png_uint_32 PNGAPI |
| 620 |
png_get_oFFs(png_structp png_ptr, png_infop info_ptr, |
| 621 |
png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) |
| 622 |
{ |
| 623 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) |
| 624 |
&& offset_x != NULL && offset_y != NULL && unit_type != NULL) |
| 625 |
{ |
| 626 |
png_debug1(1, "in %s retrieval function", "oFFs"); |
| 627 |
*offset_x = info_ptr->x_offset; |
| 628 |
*offset_y = info_ptr->y_offset; |
| 629 |
*unit_type = (int)info_ptr->offset_unit_type; |
| 630 |
return (PNG_INFO_oFFs); |
| 631 |
} |
| 632 |
return (0); |
| 633 |
} |
| 634 |
#endif |
| 635 |
|
| 636 |
#if defined(PNG_pCAL_SUPPORTED) |
| 637 |
png_uint_32 PNGAPI |
| 638 |
png_get_pCAL(png_structp png_ptr, png_infop info_ptr, |
| 639 |
png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, |
| 640 |
png_charp *units, png_charpp *params) |
| 641 |
{ |
| 642 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL) |
| 643 |
&& purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && |
| 644 |
nparams != NULL && units != NULL && params != NULL) |
| 645 |
{ |
| 646 |
png_debug1(1, "in %s retrieval function", "pCAL"); |
| 647 |
*purpose = info_ptr->pcal_purpose; |
| 648 |
*X0 = info_ptr->pcal_X0; |
| 649 |
*X1 = info_ptr->pcal_X1; |
| 650 |
*type = (int)info_ptr->pcal_type; |
| 651 |
*nparams = (int)info_ptr->pcal_nparams; |
| 652 |
*units = info_ptr->pcal_units; |
| 653 |
*params = info_ptr->pcal_params; |
| 654 |
return (PNG_INFO_pCAL); |
| 655 |
} |
| 656 |
return (0); |
| 657 |
} |
| 658 |
#endif |
| 659 |
|
| 660 |
#if defined(PNG_sCAL_SUPPORTED) |
| 661 |
#ifdef PNG_FLOATING_POINT_SUPPORTED |
| 662 |
png_uint_32 PNGAPI |
| 663 |
png_get_sCAL(png_structp png_ptr, png_infop info_ptr, |
| 664 |
int *unit, double *width, double *height) |
| 665 |
{ |
| 666 |
if (png_ptr != NULL && info_ptr != NULL && |
| 667 |
(info_ptr->valid & PNG_INFO_sCAL)) |
| 668 |
{ |
| 669 |
*unit = info_ptr->scal_unit; |
| 670 |
*width = info_ptr->scal_pixel_width; |
| 671 |
*height = info_ptr->scal_pixel_height; |
| 672 |
return (PNG_INFO_sCAL); |
| 673 |
} |
| 674 |
return(0); |
| 675 |
} |
| 676 |
#else |
| 677 |
#ifdef PNG_FIXED_POINT_SUPPORTED |
| 678 |
png_uint_32 PNGAPI |
| 679 |
png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr, |
| 680 |
int *unit, png_charpp width, png_charpp height) |
| 681 |
{ |
| 682 |
if (png_ptr != NULL && info_ptr != NULL && |
| 683 |
(info_ptr->valid & PNG_INFO_sCAL)) |
| 684 |
{ |
| 685 |
*unit = info_ptr->scal_unit; |
| 686 |
*width = info_ptr->scal_s_width; |
| 687 |
*height = info_ptr->scal_s_height; |
| 688 |
return (PNG_INFO_sCAL); |
| 689 |
} |
| 690 |
return(0); |
| 691 |
} |
| 692 |
#endif |
| 693 |
#endif |
| 694 |
#endif |
| 695 |
|
| 696 |
#if defined(PNG_pHYs_SUPPORTED) |
| 697 |
png_uint_32 PNGAPI |
| 698 |
png_get_pHYs(png_structp png_ptr, png_infop info_ptr, |
| 699 |
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) |
| 700 |
{ |
| 701 |
png_uint_32 retval = 0; |
| 702 |
|
| 703 |
if (png_ptr != NULL && info_ptr != NULL && |
| 704 |
(info_ptr->valid & PNG_INFO_pHYs)) |
| 705 |
{ |
| 706 |
png_debug1(1, "in %s retrieval function", "pHYs"); |
| 707 |
|
| 708 |
if (res_x != NULL) |
| 709 |
{ |
| 710 |
*res_x = info_ptr->x_pixels_per_unit; |
| 711 |
retval |= PNG_INFO_pHYs; |
| 712 |
} |
| 713 |
|
| 714 |
if (res_y != NULL) |
| 715 |
{ |
| 716 |
*res_y = info_ptr->y_pixels_per_unit; |
| 717 |
retval |= PNG_INFO_pHYs; |
| 718 |
} |
| 719 |
|
| 720 |
if (unit_type != NULL) |
| 721 |
{ |
| 722 |
*unit_type = (int)info_ptr->phys_unit_type; |
| 723 |
retval |= PNG_INFO_pHYs; |
| 724 |
} |
| 725 |
} |
| 726 |
return (retval); |
| 727 |
} |
| 728 |
#endif |
| 729 |
|
| 730 |
png_uint_32 PNGAPI |
| 731 |
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette, |
| 732 |
int *num_palette) |
| 733 |
{ |
| 734 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE) |
| 735 |
&& palette != NULL) |
| 736 |
{ |
| 737 |
png_debug1(1, "in %s retrieval function", "PLTE"); |
| 738 |
*palette = info_ptr->palette; |
| 739 |
*num_palette = info_ptr->num_palette; |
| 740 |
png_debug1(3, "num_palette = %d", *num_palette); |
| 741 |
return (PNG_INFO_PLTE); |
| 742 |
} |
| 743 |
return (0); |
| 744 |
} |
| 745 |
|
| 746 |
#if defined(PNG_sBIT_SUPPORTED) |
| 747 |
png_uint_32 PNGAPI |
| 748 |
png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit) |
| 749 |
{ |
| 750 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT) |
| 751 |
&& sig_bit != NULL) |
| 752 |
{ |
| 753 |
png_debug1(1, "in %s retrieval function", "sBIT"); |
| 754 |
*sig_bit = &(info_ptr->sig_bit); |
| 755 |
return (PNG_INFO_sBIT); |
| 756 |
} |
| 757 |
return (0); |
| 758 |
} |
| 759 |
#endif |
| 760 |
|
| 761 |
#if defined(PNG_TEXT_SUPPORTED) |
| 762 |
png_uint_32 PNGAPI |
| 763 |
png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, |
| 764 |
int *num_text) |
| 765 |
{ |
| 766 |
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) |
| 767 |
{ |
| 768 |
png_debug1(1, "in %s retrieval function", |
| 769 |
(png_ptr->chunk_name[0] == '\0' ? "text" |
| 770 |
: (png_const_charp)png_ptr->chunk_name)); |
| 771 |
|
| 772 |
if (text_ptr != NULL) |
| 773 |
*text_ptr = info_ptr->text; |
| 774 |
|
| 775 |
if (num_text != NULL) |
| 776 |
*num_text = info_ptr->num_text; |
| 777 |
|
| 778 |
return ((png_uint_32)info_ptr->num_text); |
| 779 |
} |
| 780 |
if (num_text != NULL) |
| 781 |
*num_text = 0; |
| 782 |
return(0); |
| 783 |
} |
| 784 |
#endif |
| 785 |
|
| 786 |
#if defined(PNG_tIME_SUPPORTED) |
| 787 |
png_uint_32 PNGAPI |
| 788 |
png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time) |
| 789 |
{ |
| 790 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME) |
| 791 |
&& mod_time != NULL) |
| 792 |
{ |
| 793 |
png_debug1(1, "in %s retrieval function", "tIME"); |
| 794 |
*mod_time = &(info_ptr->mod_time); |
| 795 |
return (PNG_INFO_tIME); |
| 796 |
} |
| 797 |
return (0); |
| 798 |
} |
| 799 |
#endif |
| 800 |
|
| 801 |
#if defined(PNG_tRNS_SUPPORTED) |
| 802 |
png_uint_32 PNGAPI |
| 803 |
png_get_tRNS(png_structp png_ptr, png_infop info_ptr, |
| 804 |
png_bytep *trans, int *num_trans, png_color_16p *trans_values) |
| 805 |
{ |
| 806 |
png_uint_32 retval = 0; |
| 807 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) |
| 808 |
{ |
| 809 |
png_debug1(1, "in %s retrieval function", "tRNS"); |
| 810 |
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
| 811 |
{ |
| 812 |
if (trans != NULL) |
| 813 |
{ |
| 814 |
*trans = info_ptr->trans; |
| 815 |
retval |= PNG_INFO_tRNS; |
| 816 |
} |
| 817 |
|
| 818 |
if (trans_values != NULL) |
| 819 |
*trans_values = &(info_ptr->trans_values); |
| 820 |
} |
| 821 |
else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ |
| 822 |
{ |
| 823 |
if (trans_values != NULL) |
| 824 |
{ |
| 825 |
*trans_values = &(info_ptr->trans_values); |
| 826 |
retval |= PNG_INFO_tRNS; |
| 827 |
} |
| 828 |
|
| 829 |
if (trans != NULL) |
| 830 |
*trans = NULL; |
| 831 |
} |
| 832 |
if (num_trans != NULL) |
| 833 |
{ |
| 834 |
*num_trans = info_ptr->num_trans; |
| 835 |
retval |= PNG_INFO_tRNS; |
| 836 |
} |
| 837 |
} |
| 838 |
return (retval); |
| 839 |
} |
| 840 |
#endif |
| 841 |
|
| 842 |
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
| 843 |
png_uint_32 PNGAPI |
| 844 |
png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, |
| 845 |
png_unknown_chunkpp unknowns) |
| 846 |
{ |
| 847 |
if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) |
| 848 |
{ |
| 849 |
*unknowns = info_ptr->unknown_chunks; |
| 850 |
return ((png_uint_32)info_ptr->unknown_chunks_num); |
| 851 |
} |
| 852 |
return (0); |
| 853 |
} |
| 854 |
#endif |
| 855 |
|
| 856 |
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) |
| 857 |
png_byte PNGAPI |
| 858 |
png_get_rgb_to_gray_status (png_structp png_ptr) |
| 859 |
{ |
| 860 |
return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0); |
| 861 |
} |
| 862 |
#endif |
| 863 |
|
| 864 |
#if defined(PNG_USER_CHUNKS_SUPPORTED) |
| 865 |
png_voidp PNGAPI |
| 866 |
png_get_user_chunk_ptr(png_structp png_ptr) |
| 867 |
{ |
| 868 |
return (png_ptr? png_ptr->user_chunk_ptr : NULL); |
| 869 |
} |
| 870 |
#endif |
| 871 |
|
| 872 |
#ifdef PNG_WRITE_SUPPORTED |
| 873 |
png_uint_32 PNGAPI |
| 874 |
png_get_compression_buffer_size(png_structp png_ptr) |
| 875 |
{ |
| 876 |
return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L); |
| 877 |
} |
| 878 |
#endif |
| 879 |
|
| 880 |
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
| 881 |
#ifndef PNG_1_0_X |
| 882 |
/* This function was added to libpng 1.2.0 and should exist by default */ |
| 883 |
png_uint_32 PNGAPI |
| 884 |
png_get_asm_flags (png_structp png_ptr) |
| 885 |
{ |
| 886 |
/* Obsolete, to be removed from libpng-1.4.0 */ |
| 887 |
return (png_ptr? 0L: 0L); |
| 888 |
} |
| 889 |
|
| 890 |
/* This function was added to libpng 1.2.0 and should exist by default */ |
| 891 |
png_uint_32 PNGAPI |
| 892 |
png_get_asm_flagmask (int flag_select) |
| 893 |
{ |
| 894 |
/* Obsolete, to be removed from libpng-1.4.0 */ |
| 895 |
flag_select=flag_select; |
| 896 |
return 0L; |
| 897 |
} |
| 898 |
|
| 899 |
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */ |
| 900 |
/* This function was added to libpng 1.2.0 */ |
| 901 |
png_uint_32 PNGAPI |
| 902 |
png_get_mmx_flagmask (int flag_select, int *compilerID) |
| 903 |
{ |
| 904 |
/* Obsolete, to be removed from libpng-1.4.0 */ |
| 905 |
flag_select=flag_select; |
| 906 |
*compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */ |
| 907 |
return 0L; |
| 908 |
} |
| 909 |
|
| 910 |
/* This function was added to libpng 1.2.0 */ |
| 911 |
png_byte PNGAPI |
| 912 |
png_get_mmx_bitdepth_threshold (png_structp png_ptr) |
| 913 |
{ |
| 914 |
/* Obsolete, to be removed from libpng-1.4.0 */ |
| 915 |
return (png_ptr? 0: 0); |
| 916 |
} |
| 917 |
|
| 918 |
/* This function was added to libpng 1.2.0 */ |
| 919 |
png_uint_32 PNGAPI |
| 920 |
png_get_mmx_rowbytes_threshold (png_structp png_ptr) |
| 921 |
{ |
| 922 |
/* Obsolete, to be removed from libpng-1.4.0 */ |
| 923 |
return (png_ptr? 0L: 0L); |
| 924 |
} |
| 925 |
#endif /* ?PNG_1_0_X */ |
| 926 |
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ |
| 927 |
|
| 928 |
#ifdef PNG_SET_USER_LIMITS_SUPPORTED |
| 929 |
/* These functions were added to libpng 1.2.6 */ |
| 930 |
png_uint_32 PNGAPI |
| 931 |
png_get_user_width_max (png_structp png_ptr) |
| 932 |
{ |
| 933 |
return (png_ptr? png_ptr->user_width_max : 0); |
| 934 |
} |
| 935 |
png_uint_32 PNGAPI |
| 936 |
png_get_user_height_max (png_structp png_ptr) |
| 937 |
{ |
| 938 |
return (png_ptr? png_ptr->user_height_max : 0); |
| 939 |
} |
| 940 |
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ |
| 941 |
|
| 942 |
|
| 943 |
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |
Parent Directory
| 
Revision Log