| 1 | ␍␊ |
| 2 | /* pngget.c - retrieval of values from info struct␍␊ |
| 3 | *␍␊ |
| 4 | * Last changed in libpng 1.5.7 [December 15, 2011]␍␊ |
| 5 | * Copyright (c) 1998-2011 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 | #include "pngpriv.h"␍␊ |
| 16 | ␍␊ |
| 17 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)␍␊ |
| 18 | ␍␊ |
| 19 | png_uint_32 PNGAPI␍␊ |
| 20 | png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 21 | png_uint_32 flag)␍␊ |
| 22 | {␍␊ |
| 23 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 24 | return(info_ptr->valid & flag);␍␊ |
| 25 | ␍␊ |
| 26 | return(0);␍␊ |
| 27 | }␍␊ |
| 28 | ␍␊ |
| 29 | png_size_t PNGAPI␍␊ |
| 30 | png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 31 | {␍␊ |
| 32 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 33 | return(info_ptr->rowbytes);␍␊ |
| 34 | ␍␊ |
| 35 | return(0);␍␊ |
| 36 | }␍␊ |
| 37 | ␍␊ |
| 38 | #ifdef PNG_INFO_IMAGE_SUPPORTED␍␊ |
| 39 | png_bytepp PNGAPI␍␊ |
| 40 | png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 41 | {␍␊ |
| 42 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 43 | return(info_ptr->row_pointers);␍␊ |
| 44 | ␍␊ |
| 45 | return(0);␍␊ |
| 46 | }␍␊ |
| 47 | #endif␍␊ |
| 48 | ␍␊ |
| 49 | #ifdef PNG_EASY_ACCESS_SUPPORTED␍␊ |
| 50 | /* Easy access to info, added in libpng-0.99 */␍␊ |
| 51 | png_uint_32 PNGAPI␍␊ |
| 52 | png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 53 | {␍␊ |
| 54 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 55 | return info_ptr->width;␍␊ |
| 56 | ␍␊ |
| 57 | return (0);␍␊ |
| 58 | }␍␊ |
| 59 | ␍␊ |
| 60 | png_uint_32 PNGAPI␍␊ |
| 61 | png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 62 | {␍␊ |
| 63 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 64 | return info_ptr->height;␍␊ |
| 65 | ␍␊ |
| 66 | return (0);␍␊ |
| 67 | }␍␊ |
| 68 | ␍␊ |
| 69 | png_byte PNGAPI␍␊ |
| 70 | png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 71 | {␍␊ |
| 72 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 73 | return info_ptr->bit_depth;␍␊ |
| 74 | ␍␊ |
| 75 | return (0);␍␊ |
| 76 | }␍␊ |
| 77 | ␍␊ |
| 78 | png_byte PNGAPI␍␊ |
| 79 | png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 80 | {␍␊ |
| 81 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 82 | return info_ptr->color_type;␍␊ |
| 83 | ␍␊ |
| 84 | return (0);␍␊ |
| 85 | }␍␊ |
| 86 | ␍␊ |
| 87 | png_byte PNGAPI␍␊ |
| 88 | png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 89 | {␍␊ |
| 90 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 91 | return info_ptr->filter_type;␍␊ |
| 92 | ␍␊ |
| 93 | return (0);␍␊ |
| 94 | }␍␊ |
| 95 | ␍␊ |
| 96 | png_byte PNGAPI␍␊ |
| 97 | png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 98 | {␍␊ |
| 99 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 100 | return info_ptr->interlace_type;␍␊ |
| 101 | ␍␊ |
| 102 | return (0);␍␊ |
| 103 | }␍␊ |
| 104 | ␍␊ |
| 105 | png_byte PNGAPI␍␊ |
| 106 | png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 107 | {␍␊ |
| 108 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 109 | return info_ptr->compression_type;␍␊ |
| 110 | ␍␊ |
| 111 | return (0);␍␊ |
| 112 | }␍␊ |
| 113 | ␍␊ |
| 114 | png_uint_32 PNGAPI␍␊ |
| 115 | png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 116 | {␍␊ |
| 117 | #ifdef PNG_pHYs_SUPPORTED␍␊ |
| 118 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))␍␊ |
| 119 | {␍␊ |
| 120 | png_debug1(1, "in %s retrieval function",␍␊ |
| 121 | "png_get_x_pixels_per_meter");␍␊ |
| 122 | ␍␊ |
| 123 | if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)␍␊ |
| 124 | return (info_ptr->x_pixels_per_unit);␍␊ |
| 125 | }␍␊ |
| 126 | #endif␍␊ |
| 127 | ␍␊ |
| 128 | return (0);␍␊ |
| 129 | }␍␊ |
| 130 | ␍␊ |
| 131 | png_uint_32 PNGAPI␍␊ |
| 132 | png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 133 | {␍␊ |
| 134 | #ifdef PNG_pHYs_SUPPORTED␍␊ |
| 135 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))␍␊ |
| 136 | {␍␊ |
| 137 | png_debug1(1, "in %s retrieval function",␍␊ |
| 138 | "png_get_y_pixels_per_meter");␍␊ |
| 139 | ␍␊ |
| 140 | if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)␍␊ |
| 141 | return (info_ptr->y_pixels_per_unit);␍␊ |
| 142 | }␍␊ |
| 143 | #endif␍␊ |
| 144 | ␍␊ |
| 145 | return (0);␍␊ |
| 146 | }␍␊ |
| 147 | ␍␊ |
| 148 | png_uint_32 PNGAPI␍␊ |
| 149 | png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 150 | {␍␊ |
| 151 | #ifdef PNG_pHYs_SUPPORTED␍␊ |
| 152 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))␍␊ |
| 153 | {␍␊ |
| 154 | png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");␍␊ |
| 155 | ␍␊ |
| 156 | if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER &&␍␊ |
| 157 | info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)␍␊ |
| 158 | return (info_ptr->x_pixels_per_unit);␍␊ |
| 159 | }␍␊ |
| 160 | #endif␍␊ |
| 161 | ␍␊ |
| 162 | return (0);␍␊ |
| 163 | }␍␊ |
| 164 | ␍␊ |
| 165 | #ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 166 | float PNGAPI␍␊ |
| 167 | png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 168 | {␍␊ |
| 169 | #ifdef PNG_READ_pHYs_SUPPORTED␍␊ |
| 170 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))␍␊ |
| 171 | {␍␊ |
| 172 | png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");␍␊ |
| 173 | ␍␊ |
| 174 | if (info_ptr->x_pixels_per_unit != 0)␍␊ |
| 175 | return ((float)((float)info_ptr->y_pixels_per_unit␍␊ |
| 176 | /(float)info_ptr->x_pixels_per_unit));␍␊ |
| 177 | }␍␊ |
| 178 | #endif␍␊ |
| 179 | ␍␊ |
| 180 | return ((float)0.0);␍␊ |
| 181 | }␍␊ |
| 182 | #endif␍␊ |
| 183 | ␍␊ |
| 184 | #ifdef PNG_FIXED_POINT_SUPPORTED␍␊ |
| 185 | png_fixed_point PNGAPI␍␊ |
| 186 | png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr,␍␊ |
| 187 | png_const_infop info_ptr)␍␊ |
| 188 | {␍␊ |
| 189 | #ifdef PNG_READ_pHYs_SUPPORTED␍␊ |
| 190 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)␍␊ |
| 191 | && info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0␍␊ |
| 192 | && info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX␍␊ |
| 193 | && info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX)␍␊ |
| 194 | {␍␊ |
| 195 | png_fixed_point res;␍␊ |
| 196 | ␍␊ |
| 197 | png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio_fixed");␍␊ |
| 198 | ␍␊ |
| 199 | /* The following casts work because a PNG 4 byte integer only has a valid␍␊ |
| 200 | * range of 0..2^31-1; otherwise the cast might overflow.␍␊ |
| 201 | */␍␊ |
| 202 | if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1,␍␊ |
| 203 | (png_int_32)info_ptr->x_pixels_per_unit))␍␊ |
| 204 | return res;␍␊ |
| 205 | }␍␊ |
| 206 | #endif␍␊ |
| 207 | ␍␊ |
| 208 | return 0;␍␊ |
| 209 | }␍␊ |
| 210 | #endif␍␊ |
| 211 | ␍␊ |
| 212 | png_int_32 PNGAPI␍␊ |
| 213 | png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 214 | {␍␊ |
| 215 | #ifdef PNG_oFFs_SUPPORTED␍␊ |
| 216 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))␍␊ |
| 217 | {␍␊ |
| 218 | png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");␍␊ |
| 219 | ␍␊ |
| 220 | if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)␍␊ |
| 221 | return (info_ptr->x_offset);␍␊ |
| 222 | }␍␊ |
| 223 | #endif␍␊ |
| 224 | ␍␊ |
| 225 | return (0);␍␊ |
| 226 | }␍␊ |
| 227 | ␍␊ |
| 228 | png_int_32 PNGAPI␍␊ |
| 229 | png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 230 | {␍␊ |
| 231 | #ifdef PNG_oFFs_SUPPORTED␍␊ |
| 232 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))␍␊ |
| 233 | {␍␊ |
| 234 | png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");␍␊ |
| 235 | ␍␊ |
| 236 | if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)␍␊ |
| 237 | return (info_ptr->y_offset);␍␊ |
| 238 | }␍␊ |
| 239 | #endif␍␊ |
| 240 | ␍␊ |
| 241 | return (0);␍␊ |
| 242 | }␍␊ |
| 243 | ␍␊ |
| 244 | png_int_32 PNGAPI␍␊ |
| 245 | png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 246 | {␍␊ |
| 247 | #ifdef PNG_oFFs_SUPPORTED␍␊ |
| 248 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))␍␊ |
| 249 | {␍␊ |
| 250 | png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels");␍␊ |
| 251 | ␍␊ |
| 252 | if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)␍␊ |
| 253 | return (info_ptr->x_offset);␍␊ |
| 254 | }␍␊ |
| 255 | #endif␍␊ |
| 256 | ␍␊ |
| 257 | return (0);␍␊ |
| 258 | }␍␊ |
| 259 | ␍␊ |
| 260 | png_int_32 PNGAPI␍␊ |
| 261 | png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 262 | {␍␊ |
| 263 | #ifdef PNG_oFFs_SUPPORTED␍␊ |
| 264 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))␍␊ |
| 265 | {␍␊ |
| 266 | png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels");␍␊ |
| 267 | ␍␊ |
| 268 | if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)␍␊ |
| 269 | return (info_ptr->y_offset);␍␊ |
| 270 | }␍␊ |
| 271 | #endif␍␊ |
| 272 | ␍␊ |
| 273 | return (0);␍␊ |
| 274 | }␍␊ |
| 275 | ␍␊ |
| 276 | #ifdef PNG_INCH_CONVERSIONS_SUPPORTED␍␊ |
| 277 | static png_uint_32␍␊ |
| 278 | ppi_from_ppm(png_uint_32 ppm)␍␊ |
| 279 | {␍␊ |
| 280 | #if 0␍␊ |
| 281 | /* The conversion is *(2.54/100), in binary (32 digits):␍␊ |
| 282 | * .00000110100000001001110101001001␍␊ |
| 283 | */␍␊ |
| 284 | png_uint_32 t1001, t1101;␍␊ |
| 285 | ppm >>= 1; /* .1 */␍␊ |
| 286 | t1001 = ppm + (ppm >> 3); /* .1001 */␍␊ |
| 287 | t1101 = t1001 + (ppm >> 1); /* .1101 */␍␊ |
| 288 | ppm >>= 20; /* .000000000000000000001 */␍␊ |
| 289 | t1101 += t1101 >> 15; /* .1101000000000001101 */␍␊ |
| 290 | t1001 >>= 11; /* .000000000001001 */␍␊ |
| 291 | t1001 += t1001 >> 12; /* .000000000001001000000001001 */␍␊ |
| 292 | ppm += t1001; /* .000000000001001000001001001 */␍␊ |
| 293 | ppm += t1101; /* .110100000001001110101001001 */␍␊ |
| 294 | return (ppm + 16) >> 5;/* .00000110100000001001110101001001 */␍␊ |
| 295 | #else␍␊ |
| 296 | /* The argument is a PNG unsigned integer, so it is not permitted␍␊ |
| 297 | * to be bigger than 2^31.␍␊ |
| 298 | */␍␊ |
| 299 | png_fixed_point result;␍␊ |
| 300 | if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127,␍␊ |
| 301 | 5000))␍␊ |
| 302 | return result;␍␊ |
| 303 | ␍␊ |
| 304 | /* Overflow. */␍␊ |
| 305 | return 0;␍␊ |
| 306 | #endif␍␊ |
| 307 | }␍␊ |
| 308 | ␍␊ |
| 309 | png_uint_32 PNGAPI␍␊ |
| 310 | png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 311 | {␍␊ |
| 312 | return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr));␍␊ |
| 313 | }␍␊ |
| 314 | ␍␊ |
| 315 | png_uint_32 PNGAPI␍␊ |
| 316 | png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 317 | {␍␊ |
| 318 | return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr));␍␊ |
| 319 | }␍␊ |
| 320 | ␍␊ |
| 321 | png_uint_32 PNGAPI␍␊ |
| 322 | png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 323 | {␍␊ |
| 324 | return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr));␍␊ |
| 325 | }␍␊ |
| 326 | ␍␊ |
| 327 | #ifdef PNG_FIXED_POINT_SUPPORTED␍␊ |
| 328 | static png_fixed_point␍␊ |
| 329 | png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns)␍␊ |
| 330 | {␍␊ |
| 331 | /* Convert from metres * 1,000,000 to inches * 100,000, meters to␍␊ |
| 332 | * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127.␍␊ |
| 333 | * Notice that this can overflow - a warning is output and 0 is␍␊ |
| 334 | * returned.␍␊ |
| 335 | */␍␊ |
| 336 | return png_muldiv_warn(png_ptr, microns, 500, 127);␍␊ |
| 337 | }␍␊ |
| 338 | ␍␊ |
| 339 | png_fixed_point PNGAPI␍␊ |
| 340 | png_get_x_offset_inches_fixed(png_structp png_ptr,␍␊ |
| 341 | png_const_infop info_ptr)␍␊ |
| 342 | {␍␊ |
| 343 | return png_fixed_inches_from_microns(png_ptr,␍␊ |
| 344 | png_get_x_offset_microns(png_ptr, info_ptr));␍␊ |
| 345 | }␍␊ |
| 346 | #endif␍␊ |
| 347 | ␍␊ |
| 348 | #ifdef PNG_FIXED_POINT_SUPPORTED␍␊ |
| 349 | png_fixed_point PNGAPI␍␊ |
| 350 | png_get_y_offset_inches_fixed(png_structp png_ptr,␍␊ |
| 351 | png_const_infop info_ptr)␍␊ |
| 352 | {␍␊ |
| 353 | return png_fixed_inches_from_microns(png_ptr,␍␊ |
| 354 | png_get_y_offset_microns(png_ptr, info_ptr));␍␊ |
| 355 | }␍␊ |
| 356 | #endif␍␊ |
| 357 | ␍␊ |
| 358 | #ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 359 | float PNGAPI␍␊ |
| 360 | png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 361 | {␍␊ |
| 362 | /* To avoid the overflow do the conversion directly in floating␍␊ |
| 363 | * point.␍␊ |
| 364 | */␍␊ |
| 365 | return (float)(png_get_x_offset_microns(png_ptr, info_ptr) * .00003937);␍␊ |
| 366 | }␍␊ |
| 367 | #endif␍␊ |
| 368 | ␍␊ |
| 369 | #ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 370 | float PNGAPI␍␊ |
| 371 | png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 372 | {␍␊ |
| 373 | /* To avoid the overflow do the conversion directly in floating␍␊ |
| 374 | * point.␍␊ |
| 375 | */␍␊ |
| 376 | return (float)(png_get_y_offset_microns(png_ptr, info_ptr) * .00003937);␍␊ |
| 377 | }␍␊ |
| 378 | #endif␍␊ |
| 379 | ␍␊ |
| 380 | #ifdef PNG_pHYs_SUPPORTED␍␊ |
| 381 | png_uint_32 PNGAPI␍␊ |
| 382 | png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 383 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)␍␊ |
| 384 | {␍␊ |
| 385 | png_uint_32 retval = 0;␍␊ |
| 386 | ␍␊ |
| 387 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))␍␊ |
| 388 | {␍␊ |
| 389 | png_debug1(1, "in %s retrieval function", "pHYs");␍␊ |
| 390 | ␍␊ |
| 391 | if (res_x != NULL)␍␊ |
| 392 | {␍␊ |
| 393 | *res_x = info_ptr->x_pixels_per_unit;␍␊ |
| 394 | retval |= PNG_INFO_pHYs;␍␊ |
| 395 | }␍␊ |
| 396 | ␍␊ |
| 397 | if (res_y != NULL)␍␊ |
| 398 | {␍␊ |
| 399 | *res_y = info_ptr->y_pixels_per_unit;␍␊ |
| 400 | retval |= PNG_INFO_pHYs;␍␊ |
| 401 | }␍␊ |
| 402 | ␍␊ |
| 403 | if (unit_type != NULL)␍␊ |
| 404 | {␍␊ |
| 405 | *unit_type = (int)info_ptr->phys_unit_type;␍␊ |
| 406 | retval |= PNG_INFO_pHYs;␍␊ |
| 407 | ␍␊ |
| 408 | if (*unit_type == 1)␍␊ |
| 409 | {␍␊ |
| 410 | if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);␍␊ |
| 411 | if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);␍␊ |
| 412 | }␍␊ |
| 413 | }␍␊ |
| 414 | }␍␊ |
| 415 | ␍␊ |
| 416 | return (retval);␍␊ |
| 417 | }␍␊ |
| 418 | #endif /* PNG_pHYs_SUPPORTED */␍␊ |
| 419 | #endif /* PNG_INCH_CONVERSIONS_SUPPORTED */␍␊ |
| 420 | ␍␊ |
| 421 | /* png_get_channels really belongs in here, too, but it's been around longer */␍␊ |
| 422 | ␍␊ |
| 423 | #endif /* PNG_EASY_ACCESS_SUPPORTED */␍␊ |
| 424 | ␍␊ |
| 425 | png_byte PNGAPI␍␊ |
| 426 | png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr)␍␊ |
| 427 | {␍␊ |
| 428 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 429 | return(info_ptr->channels);␍␊ |
| 430 | ␍␊ |
| 431 | return (0);␍␊ |
| 432 | }␍␊ |
| 433 | ␍␊ |
| 434 | png_const_bytep PNGAPI␍␊ |
| 435 | png_get_signature(png_const_structp png_ptr, png_infop info_ptr)␍␊ |
| 436 | {␍␊ |
| 437 | if (png_ptr != NULL && info_ptr != NULL)␍␊ |
| 438 | return(info_ptr->signature);␍␊ |
| 439 | ␍␊ |
| 440 | return (NULL);␍␊ |
| 441 | }␍␊ |
| 442 | ␍␊ |
| 443 | #ifdef PNG_bKGD_SUPPORTED␍␊ |
| 444 | png_uint_32 PNGAPI␍␊ |
| 445 | png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr,␍␊ |
| 446 | png_color_16p *background)␍␊ |
| 447 | {␍␊ |
| 448 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)␍␊ |
| 449 | && background != NULL)␍␊ |
| 450 | {␍␊ |
| 451 | png_debug1(1, "in %s retrieval function", "bKGD");␍␊ |
| 452 | ␍␊ |
| 453 | *background = &(info_ptr->background);␍␊ |
| 454 | return (PNG_INFO_bKGD);␍␊ |
| 455 | }␍␊ |
| 456 | ␍␊ |
| 457 | return (0);␍␊ |
| 458 | }␍␊ |
| 459 | #endif␍␊ |
| 460 | ␍␊ |
| 461 | #ifdef PNG_cHRM_SUPPORTED␍␊ |
| 462 | /* The XYZ APIs were added in 1.5.5 to take advantage of the code added at the␍␊ |
| 463 | * same time to correct the rgb grayscale coefficient defaults obtained from the␍␊ |
| 464 | * cHRM chunk in 1.5.4␍␊ |
| 465 | */␍␊ |
| 466 | png_uint_32 PNGFAPI␍␊ |
| 467 | png_get_cHRM_XYZ_fixed(png_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 468 | png_fixed_point *int_red_X, png_fixed_point *int_red_Y,␍␊ |
| 469 | png_fixed_point *int_red_Z, png_fixed_point *int_green_X,␍␊ |
| 470 | png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,␍␊ |
| 471 | png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,␍␊ |
| 472 | png_fixed_point *int_blue_Z)␍␊ |
| 473 | {␍␊ |
| 474 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))␍␊ |
| 475 | {␍␊ |
| 476 | png_xy xy;␍␊ |
| 477 | png_XYZ XYZ;␍␊ |
| 478 | ␍␊ |
| 479 | png_debug1(1, "in %s retrieval function", "cHRM_XYZ");␍␊ |
| 480 | ␍␊ |
| 481 | xy.whitex = info_ptr->x_white;␍␊ |
| 482 | xy.whitey = info_ptr->y_white;␍␊ |
| 483 | xy.redx = info_ptr->x_red;␍␊ |
| 484 | xy.redy = info_ptr->y_red;␍␊ |
| 485 | xy.greenx = info_ptr->x_green;␍␊ |
| 486 | xy.greeny = info_ptr->y_green;␍␊ |
| 487 | xy.bluex = info_ptr->x_blue;␍␊ |
| 488 | xy.bluey = info_ptr->y_blue;␍␊ |
| 489 | ␍␊ |
| 490 | /* The *_checked function handles error reporting, so just return 0 if␍␊ |
| 491 | * there is a failure here.␍␊ |
| 492 | */␍␊ |
| 493 | if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy))␍␊ |
| 494 | {␍␊ |
| 495 | if (int_red_X != NULL)␍␊ |
| 496 | *int_red_X = XYZ.redX;␍␊ |
| 497 | if (int_red_Y != NULL)␍␊ |
| 498 | *int_red_Y = XYZ.redY;␍␊ |
| 499 | if (int_red_Z != NULL)␍␊ |
| 500 | *int_red_Z = XYZ.redZ;␍␊ |
| 501 | if (int_green_X != NULL)␍␊ |
| 502 | *int_green_X = XYZ.greenX;␍␊ |
| 503 | if (int_green_Y != NULL)␍␊ |
| 504 | *int_green_Y = XYZ.greenY;␍␊ |
| 505 | if (int_green_Z != NULL)␍␊ |
| 506 | *int_green_Z = XYZ.greenZ;␍␊ |
| 507 | if (int_blue_X != NULL)␍␊ |
| 508 | *int_blue_X = XYZ.blueX;␍␊ |
| 509 | if (int_blue_Y != NULL)␍␊ |
| 510 | *int_blue_Y = XYZ.blueY;␍␊ |
| 511 | if (int_blue_Z != NULL)␍␊ |
| 512 | *int_blue_Z = XYZ.blueZ;␍␊ |
| 513 | ␍␊ |
| 514 | return (PNG_INFO_cHRM);␍␊ |
| 515 | }␍␊ |
| 516 | }␍␊ |
| 517 | ␍␊ |
| 518 | return (0);␍␊ |
| 519 | }␍␊ |
| 520 | ␍␊ |
| 521 | # ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 522 | png_uint_32 PNGAPI␍␊ |
| 523 | png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 524 | double *white_x, double *white_y, double *red_x, double *red_y,␍␊ |
| 525 | double *green_x, double *green_y, double *blue_x, double *blue_y)␍␊ |
| 526 | {␍␊ |
| 527 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))␍␊ |
| 528 | {␍␊ |
| 529 | png_debug1(1, "in %s retrieval function", "cHRM");␍␊ |
| 530 | ␍␊ |
| 531 | if (white_x != NULL)␍␊ |
| 532 | *white_x = png_float(png_ptr, info_ptr->x_white, "cHRM white X");␍␊ |
| 533 | if (white_y != NULL)␍␊ |
| 534 | *white_y = png_float(png_ptr, info_ptr->y_white, "cHRM white Y");␍␊ |
| 535 | if (red_x != NULL)␍␊ |
| 536 | *red_x = png_float(png_ptr, info_ptr->x_red, "cHRM red X");␍␊ |
| 537 | if (red_y != NULL)␍␊ |
| 538 | *red_y = png_float(png_ptr, info_ptr->y_red, "cHRM red Y");␍␊ |
| 539 | if (green_x != NULL)␍␊ |
| 540 | *green_x = png_float(png_ptr, info_ptr->x_green, "cHRM green X");␍␊ |
| 541 | if (green_y != NULL)␍␊ |
| 542 | *green_y = png_float(png_ptr, info_ptr->y_green, "cHRM green Y");␍␊ |
| 543 | if (blue_x != NULL)␍␊ |
| 544 | *blue_x = png_float(png_ptr, info_ptr->x_blue, "cHRM blue X");␍␊ |
| 545 | if (blue_y != NULL)␍␊ |
| 546 | *blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y");␍␊ |
| 547 | return (PNG_INFO_cHRM);␍␊ |
| 548 | }␍␊ |
| 549 | ␍␊ |
| 550 | return (0);␍␊ |
| 551 | }␍␊ |
| 552 | ␍␊ |
| 553 | png_uint_32 PNGAPI␍␊ |
| 554 | png_get_cHRM_XYZ(png_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 555 | double *red_X, double *red_Y, double *red_Z, double *green_X,␍␊ |
| 556 | double *green_Y, double *green_Z, double *blue_X, double *blue_Y,␍␊ |
| 557 | double *blue_Z)␍␊ |
| 558 | {␍␊ |
| 559 | png_XYZ XYZ;␍␊ |
| 560 | ␍␊ |
| 561 | if (png_get_cHRM_XYZ_fixed(png_ptr, info_ptr,␍␊ |
| 562 | &XYZ.redX, &XYZ.redY, &XYZ.redZ, &XYZ.greenX, &XYZ.greenY, &XYZ.greenZ,␍␊ |
| 563 | &XYZ.blueX, &XYZ.blueY, &XYZ.blueZ) & PNG_INFO_cHRM)␍␊ |
| 564 | {␍␊ |
| 565 | if (red_X != NULL)␍␊ |
| 566 | *red_X = png_float(png_ptr, XYZ.redX, "cHRM red X");␍␊ |
| 567 | if (red_Y != NULL)␍␊ |
| 568 | *red_Y = png_float(png_ptr, XYZ.redY, "cHRM red Y");␍␊ |
| 569 | if (red_Z != NULL)␍␊ |
| 570 | *red_Z = png_float(png_ptr, XYZ.redZ, "cHRM red Z");␍␊ |
| 571 | if (green_X != NULL)␍␊ |
| 572 | *green_X = png_float(png_ptr, XYZ.greenX, "cHRM green X");␍␊ |
| 573 | if (green_Y != NULL)␍␊ |
| 574 | *green_Y = png_float(png_ptr, XYZ.greenY, "cHRM green Y");␍␊ |
| 575 | if (green_Z != NULL)␍␊ |
| 576 | *green_Z = png_float(png_ptr, XYZ.greenZ, "cHRM green Z");␍␊ |
| 577 | if (blue_X != NULL)␍␊ |
| 578 | *blue_X = png_float(png_ptr, XYZ.blueX, "cHRM blue X");␍␊ |
| 579 | if (blue_Y != NULL)␍␊ |
| 580 | *blue_Y = png_float(png_ptr, XYZ.blueY, "cHRM blue Y");␍␊ |
| 581 | if (blue_Z != NULL)␍␊ |
| 582 | *blue_Z = png_float(png_ptr, XYZ.blueZ, "cHRM blue Z");␍␊ |
| 583 | return (PNG_INFO_cHRM);␍␊ |
| 584 | }␍␊ |
| 585 | ␍␊ |
| 586 | return (0);␍␊ |
| 587 | }␍␊ |
| 588 | # endif␍␊ |
| 589 | ␍␊ |
| 590 | # ifdef PNG_FIXED_POINT_SUPPORTED␍␊ |
| 591 | png_uint_32 PNGAPI␍␊ |
| 592 | png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 593 | png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,␍␊ |
| 594 | png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,␍␊ |
| 595 | png_fixed_point *blue_x, png_fixed_point *blue_y)␍␊ |
| 596 | {␍␊ |
| 597 | png_debug1(1, "in %s retrieval function", "cHRM");␍␊ |
| 598 | ␍␊ |
| 599 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))␍␊ |
| 600 | {␍␊ |
| 601 | if (white_x != NULL)␍␊ |
| 602 | *white_x = info_ptr->x_white;␍␊ |
| 603 | if (white_y != NULL)␍␊ |
| 604 | *white_y = info_ptr->y_white;␍␊ |
| 605 | if (red_x != NULL)␍␊ |
| 606 | *red_x = info_ptr->x_red;␍␊ |
| 607 | if (red_y != NULL)␍␊ |
| 608 | *red_y = info_ptr->y_red;␍␊ |
| 609 | if (green_x != NULL)␍␊ |
| 610 | *green_x = info_ptr->x_green;␍␊ |
| 611 | if (green_y != NULL)␍␊ |
| 612 | *green_y = info_ptr->y_green;␍␊ |
| 613 | if (blue_x != NULL)␍␊ |
| 614 | *blue_x = info_ptr->x_blue;␍␊ |
| 615 | if (blue_y != NULL)␍␊ |
| 616 | *blue_y = info_ptr->y_blue;␍␊ |
| 617 | return (PNG_INFO_cHRM);␍␊ |
| 618 | }␍␊ |
| 619 | ␍␊ |
| 620 | return (0);␍␊ |
| 621 | }␍␊ |
| 622 | # endif␍␊ |
| 623 | #endif␍␊ |
| 624 | ␍␊ |
| 625 | #ifdef PNG_gAMA_SUPPORTED␍␊ |
| 626 | png_uint_32 PNGFAPI␍␊ |
| 627 | png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 628 | png_fixed_point *file_gamma)␍␊ |
| 629 | {␍␊ |
| 630 | png_debug1(1, "in %s retrieval function", "gAMA");␍␊ |
| 631 | ␍␊ |
| 632 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)␍␊ |
| 633 | && file_gamma != NULL)␍␊ |
| 634 | {␍␊ |
| 635 | *file_gamma = info_ptr->gamma;␍␊ |
| 636 | return (PNG_INFO_gAMA);␍␊ |
| 637 | }␍␊ |
| 638 | ␍␊ |
| 639 | return (0);␍␊ |
| 640 | }␍␊ |
| 641 | # ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 642 | png_uint_32 PNGAPI␍␊ |
| 643 | png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 644 | double *file_gamma)␍␊ |
| 645 | {␍␊ |
| 646 | png_fixed_point igamma;␍␊ |
| 647 | png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma);␍␊ |
| 648 | ␍␊ |
| 649 | if (ok)␍␊ |
| 650 | *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA");␍␊ |
| 651 | ␍␊ |
| 652 | return ok;␍␊ |
| 653 | }␍␊ |
| 654 | ␍␊ |
| 655 | # endif␍␊ |
| 656 | #endif␍␊ |
| 657 | ␍␊ |
| 658 | #ifdef PNG_sRGB_SUPPORTED␍␊ |
| 659 | png_uint_32 PNGAPI␍␊ |
| 660 | png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 661 | int *file_srgb_intent)␍␊ |
| 662 | {␍␊ |
| 663 | png_debug1(1, "in %s retrieval function", "sRGB");␍␊ |
| 664 | ␍␊ |
| 665 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)␍␊ |
| 666 | && file_srgb_intent != NULL)␍␊ |
| 667 | {␍␊ |
| 668 | *file_srgb_intent = (int)info_ptr->srgb_intent;␍␊ |
| 669 | return (PNG_INFO_sRGB);␍␊ |
| 670 | }␍␊ |
| 671 | ␍␊ |
| 672 | return (0);␍␊ |
| 673 | }␍␊ |
| 674 | #endif␍␊ |
| 675 | ␍␊ |
| 676 | #ifdef PNG_iCCP_SUPPORTED␍␊ |
| 677 | png_uint_32 PNGAPI␍␊ |
| 678 | png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 679 | png_charpp name, int *compression_type,␍␊ |
| 680 | png_bytepp profile, png_uint_32 *proflen)␍␊ |
| 681 | {␍␊ |
| 682 | png_debug1(1, "in %s retrieval function", "iCCP");␍␊ |
| 683 | ␍␊ |
| 684 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)␍␊ |
| 685 | && name != NULL && compression_type != NULL && profile != NULL &&␍␊ |
| 686 | ␉␉ proflen != NULL)␍␊ |
| 687 | {␍␊ |
| 688 | *name = info_ptr->iccp_name;␍␊ |
| 689 | *profile = info_ptr->iccp_profile;␍␊ |
| 690 | /* Compression_type is a dummy so the API won't have to change␍␊ |
| 691 | * if we introduce multiple compression types later.␍␊ |
| 692 | */␍␊ |
| 693 | *proflen = info_ptr->iccp_proflen;␍␊ |
| 694 | *compression_type = info_ptr->iccp_compression;␍␊ |
| 695 | return (PNG_INFO_iCCP);␍␊ |
| 696 | }␍␊ |
| 697 | ␍␊ |
| 698 | return (0);␍␊ |
| 699 | }␍␊ |
| 700 | #endif␍␊ |
| 701 | ␍␊ |
| 702 | #ifdef PNG_sPLT_SUPPORTED␍␊ |
| 703 | png_uint_32 PNGAPI␍␊ |
| 704 | png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 705 | png_sPLT_tpp spalettes)␍␊ |
| 706 | {␍␊ |
| 707 | if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)␍␊ |
| 708 | {␍␊ |
| 709 | *spalettes = info_ptr->splt_palettes;␍␊ |
| 710 | return ((png_uint_32)info_ptr->splt_palettes_num);␍␊ |
| 711 | }␍␊ |
| 712 | ␍␊ |
| 713 | return (0);␍␊ |
| 714 | }␍␊ |
| 715 | #endif␍␊ |
| 716 | ␍␊ |
| 717 | #ifdef PNG_hIST_SUPPORTED␍␊ |
| 718 | png_uint_32 PNGAPI␍␊ |
| 719 | png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 720 | png_uint_16p *hist)␍␊ |
| 721 | {␍␊ |
| 722 | png_debug1(1, "in %s retrieval function", "hIST");␍␊ |
| 723 | ␍␊ |
| 724 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)␍␊ |
| 725 | && hist != NULL)␍␊ |
| 726 | {␍␊ |
| 727 | *hist = info_ptr->hist;␍␊ |
| 728 | return (PNG_INFO_hIST);␍␊ |
| 729 | }␍␊ |
| 730 | ␍␊ |
| 731 | return (0);␍␊ |
| 732 | }␍␊ |
| 733 | #endif␍␊ |
| 734 | ␍␊ |
| 735 | png_uint_32 PNGAPI␍␊ |
| 736 | png_get_IHDR(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 737 | png_uint_32 *width, png_uint_32 *height, int *bit_depth,␍␊ |
| 738 | int *color_type, int *interlace_type, int *compression_type,␍␊ |
| 739 | int *filter_type)␍␊ |
| 740 | ␍␊ |
| 741 | {␍␊ |
| 742 | png_debug1(1, "in %s retrieval function", "IHDR");␍␊ |
| 743 | ␍␊ |
| 744 | if (png_ptr == NULL || info_ptr == NULL || width == NULL ||␍␊ |
| 745 | height == NULL || bit_depth == NULL || color_type == NULL)␍␊ |
| 746 | return (0);␍␊ |
| 747 | ␍␊ |
| 748 | *width = info_ptr->width;␍␊ |
| 749 | *height = info_ptr->height;␍␊ |
| 750 | *bit_depth = info_ptr->bit_depth;␍␊ |
| 751 | *color_type = info_ptr->color_type;␍␊ |
| 752 | ␍␊ |
| 753 | if (compression_type != NULL)␍␊ |
| 754 | *compression_type = info_ptr->compression_type;␍␊ |
| 755 | ␍␊ |
| 756 | if (filter_type != NULL)␍␊ |
| 757 | *filter_type = info_ptr->filter_type;␍␊ |
| 758 | ␍␊ |
| 759 | if (interlace_type != NULL)␍␊ |
| 760 | *interlace_type = info_ptr->interlace_type;␍␊ |
| 761 | ␍␊ |
| 762 | /* This is redundant if we can be sure that the info_ptr values were all␍␊ |
| 763 | * assigned in png_set_IHDR(). We do the check anyhow in case an␍␊ |
| 764 | * application has ignored our advice not to mess with the members␍␊ |
| 765 | * of info_ptr directly.␍␊ |
| 766 | */␍␊ |
| 767 | png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,␍␊ |
| 768 | info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,␍␊ |
| 769 | info_ptr->compression_type, info_ptr->filter_type);␍␊ |
| 770 | ␍␊ |
| 771 | return (1);␍␊ |
| 772 | }␍␊ |
| 773 | ␍␊ |
| 774 | #ifdef PNG_oFFs_SUPPORTED␍␊ |
| 775 | png_uint_32 PNGAPI␍␊ |
| 776 | png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 777 | png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)␍␊ |
| 778 | {␍␊ |
| 779 | png_debug1(1, "in %s retrieval function", "oFFs");␍␊ |
| 780 | ␍␊ |
| 781 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)␍␊ |
| 782 | && offset_x != NULL && offset_y != NULL && unit_type != NULL)␍␊ |
| 783 | {␍␊ |
| 784 | *offset_x = info_ptr->x_offset;␍␊ |
| 785 | *offset_y = info_ptr->y_offset;␍␊ |
| 786 | *unit_type = (int)info_ptr->offset_unit_type;␍␊ |
| 787 | return (PNG_INFO_oFFs);␍␊ |
| 788 | }␍␊ |
| 789 | ␍␊ |
| 790 | return (0);␍␊ |
| 791 | }␍␊ |
| 792 | #endif␍␊ |
| 793 | ␍␊ |
| 794 | #ifdef PNG_pCAL_SUPPORTED␍␊ |
| 795 | png_uint_32 PNGAPI␍␊ |
| 796 | png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 797 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,␍␊ |
| 798 | png_charp *units, png_charpp *params)␍␊ |
| 799 | {␍␊ |
| 800 | png_debug1(1, "in %s retrieval function", "pCAL");␍␊ |
| 801 | ␍␊ |
| 802 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)␍␊ |
| 803 | && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&␍␊ |
| 804 | nparams != NULL && units != NULL && params != NULL)␍␊ |
| 805 | {␍␊ |
| 806 | *purpose = info_ptr->pcal_purpose;␍␊ |
| 807 | *X0 = info_ptr->pcal_X0;␍␊ |
| 808 | *X1 = info_ptr->pcal_X1;␍␊ |
| 809 | *type = (int)info_ptr->pcal_type;␍␊ |
| 810 | *nparams = (int)info_ptr->pcal_nparams;␍␊ |
| 811 | *units = info_ptr->pcal_units;␍␊ |
| 812 | *params = info_ptr->pcal_params;␍␊ |
| 813 | return (PNG_INFO_pCAL);␍␊ |
| 814 | }␍␊ |
| 815 | ␍␊ |
| 816 | return (0);␍␊ |
| 817 | }␍␊ |
| 818 | #endif␍␊ |
| 819 | ␍␊ |
| 820 | #ifdef PNG_sCAL_SUPPORTED␍␊ |
| 821 | # ifdef PNG_FIXED_POINT_SUPPORTED␍␊ |
| 822 | # ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED␍␊ |
| 823 | png_uint_32 PNGAPI␍␊ |
| 824 | png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 825 | int *unit, png_fixed_point *width, png_fixed_point *height)␍␊ |
| 826 | {␍␊ |
| 827 | if (png_ptr != NULL && info_ptr != NULL &&␍␊ |
| 828 | (info_ptr->valid & PNG_INFO_sCAL))␍␊ |
| 829 | {␍␊ |
| 830 | *unit = info_ptr->scal_unit;␍␊ |
| 831 | /*TODO: make this work without FP support */␍␊ |
| 832 | *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width");␍␊ |
| 833 | *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height),␍␊ |
| 834 | "sCAL height");␍␊ |
| 835 | return (PNG_INFO_sCAL);␍␊ |
| 836 | }␍␊ |
| 837 | ␍␊ |
| 838 | return(0);␍␊ |
| 839 | }␍␊ |
| 840 | # endif /* FLOATING_ARITHMETIC */␍␊ |
| 841 | # endif /* FIXED_POINT */␍␊ |
| 842 | # ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 843 | png_uint_32 PNGAPI␍␊ |
| 844 | png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 845 | int *unit, double *width, double *height)␍␊ |
| 846 | {␍␊ |
| 847 | if (png_ptr != NULL && info_ptr != NULL &&␍␊ |
| 848 | (info_ptr->valid & PNG_INFO_sCAL))␍␊ |
| 849 | {␍␊ |
| 850 | *unit = info_ptr->scal_unit;␍␊ |
| 851 | *width = atof(info_ptr->scal_s_width);␍␊ |
| 852 | *height = atof(info_ptr->scal_s_height);␍␊ |
| 853 | return (PNG_INFO_sCAL);␍␊ |
| 854 | }␍␊ |
| 855 | ␍␊ |
| 856 | return(0);␍␊ |
| 857 | }␍␊ |
| 858 | # endif /* FLOATING POINT */␍␊ |
| 859 | png_uint_32 PNGAPI␍␊ |
| 860 | png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 861 | int *unit, png_charpp width, png_charpp height)␍␊ |
| 862 | {␍␊ |
| 863 | if (png_ptr != NULL && info_ptr != NULL &&␍␊ |
| 864 | (info_ptr->valid & PNG_INFO_sCAL))␍␊ |
| 865 | {␍␊ |
| 866 | *unit = info_ptr->scal_unit;␍␊ |
| 867 | *width = info_ptr->scal_s_width;␍␊ |
| 868 | *height = info_ptr->scal_s_height;␍␊ |
| 869 | return (PNG_INFO_sCAL);␍␊ |
| 870 | }␍␊ |
| 871 | ␍␊ |
| 872 | return(0);␍␊ |
| 873 | }␍␊ |
| 874 | #endif /* sCAL */␍␊ |
| 875 | ␍␊ |
| 876 | #ifdef PNG_pHYs_SUPPORTED␍␊ |
| 877 | png_uint_32 PNGAPI␍␊ |
| 878 | png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 879 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)␍␊ |
| 880 | {␍␊ |
| 881 | png_uint_32 retval = 0;␍␊ |
| 882 | ␍␊ |
| 883 | png_debug1(1, "in %s retrieval function", "pHYs");␍␊ |
| 884 | ␍␊ |
| 885 | if (png_ptr != NULL && info_ptr != NULL &&␍␊ |
| 886 | (info_ptr->valid & PNG_INFO_pHYs))␍␊ |
| 887 | {␍␊ |
| 888 | if (res_x != NULL)␍␊ |
| 889 | {␍␊ |
| 890 | *res_x = info_ptr->x_pixels_per_unit;␍␊ |
| 891 | retval |= PNG_INFO_pHYs;␍␊ |
| 892 | }␍␊ |
| 893 | ␍␊ |
| 894 | if (res_y != NULL)␍␊ |
| 895 | {␍␊ |
| 896 | *res_y = info_ptr->y_pixels_per_unit;␍␊ |
| 897 | retval |= PNG_INFO_pHYs;␍␊ |
| 898 | }␍␊ |
| 899 | ␍␊ |
| 900 | if (unit_type != NULL)␍␊ |
| 901 | {␍␊ |
| 902 | *unit_type = (int)info_ptr->phys_unit_type;␍␊ |
| 903 | retval |= PNG_INFO_pHYs;␍␊ |
| 904 | }␍␊ |
| 905 | }␍␊ |
| 906 | ␍␊ |
| 907 | return (retval);␍␊ |
| 908 | }␍␊ |
| 909 | #endif /* pHYs */␍␊ |
| 910 | ␍␊ |
| 911 | png_uint_32 PNGAPI␍␊ |
| 912 | png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 913 | png_colorp *palette, int *num_palette)␍␊ |
| 914 | {␍␊ |
| 915 | png_debug1(1, "in %s retrieval function", "PLTE");␍␊ |
| 916 | ␍␊ |
| 917 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)␍␊ |
| 918 | && palette != NULL)␍␊ |
| 919 | {␍␊ |
| 920 | *palette = info_ptr->palette;␍␊ |
| 921 | *num_palette = info_ptr->num_palette;␍␊ |
| 922 | png_debug1(3, "num_palette = %d", *num_palette);␍␊ |
| 923 | return (PNG_INFO_PLTE);␍␊ |
| 924 | }␍␊ |
| 925 | ␍␊ |
| 926 | return (0);␍␊ |
| 927 | }␍␊ |
| 928 | ␍␊ |
| 929 | #ifdef PNG_sBIT_SUPPORTED␍␊ |
| 930 | png_uint_32 PNGAPI␍␊ |
| 931 | png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr,␍␊ |
| 932 | png_color_8p *sig_bit)␍␊ |
| 933 | {␍␊ |
| 934 | png_debug1(1, "in %s retrieval function", "sBIT");␍␊ |
| 935 | ␍␊ |
| 936 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)␍␊ |
| 937 | && sig_bit != NULL)␍␊ |
| 938 | {␍␊ |
| 939 | *sig_bit = &(info_ptr->sig_bit);␍␊ |
| 940 | return (PNG_INFO_sBIT);␍␊ |
| 941 | }␍␊ |
| 942 | ␍␊ |
| 943 | return (0);␍␊ |
| 944 | }␍␊ |
| 945 | #endif␍␊ |
| 946 | ␍␊ |
| 947 | #ifdef PNG_TEXT_SUPPORTED␍␊ |
| 948 | png_uint_32 PNGAPI␍␊ |
| 949 | png_get_text(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 950 | png_textp *text_ptr, int *num_text)␍␊ |
| 951 | {␍␊ |
| 952 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)␍␊ |
| 953 | {␍␊ |
| 954 | png_debug1(1, "in 0x%lx retrieval function",␍␊ |
| 955 | (unsigned long)png_ptr->chunk_name);␍␊ |
| 956 | ␍␊ |
| 957 | if (text_ptr != NULL)␍␊ |
| 958 | *text_ptr = info_ptr->text;␍␊ |
| 959 | ␍␊ |
| 960 | if (num_text != NULL)␍␊ |
| 961 | *num_text = info_ptr->num_text;␍␊ |
| 962 | ␍␊ |
| 963 | return ((png_uint_32)info_ptr->num_text);␍␊ |
| 964 | }␍␊ |
| 965 | ␍␊ |
| 966 | if (num_text != NULL)␍␊ |
| 967 | *num_text = 0;␍␊ |
| 968 | ␍␊ |
| 969 | return(0);␍␊ |
| 970 | }␍␊ |
| 971 | #endif␍␊ |
| 972 | ␍␊ |
| 973 | #ifdef PNG_tIME_SUPPORTED␍␊ |
| 974 | png_uint_32 PNGAPI␍␊ |
| 975 | png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)␍␊ |
| 976 | {␍␊ |
| 977 | png_debug1(1, "in %s retrieval function", "tIME");␍␊ |
| 978 | ␍␊ |
| 979 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)␍␊ |
| 980 | && mod_time != NULL)␍␊ |
| 981 | {␍␊ |
| 982 | *mod_time = &(info_ptr->mod_time);␍␊ |
| 983 | return (PNG_INFO_tIME);␍␊ |
| 984 | }␍␊ |
| 985 | ␍␊ |
| 986 | return (0);␍␊ |
| 987 | }␍␊ |
| 988 | #endif␍␊ |
| 989 | ␍␊ |
| 990 | #ifdef PNG_tRNS_SUPPORTED␍␊ |
| 991 | png_uint_32 PNGAPI␍␊ |
| 992 | png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr,␍␊ |
| 993 | png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)␍␊ |
| 994 | {␍␊ |
| 995 | png_uint_32 retval = 0;␍␊ |
| 996 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))␍␊ |
| 997 | {␍␊ |
| 998 | png_debug1(1, "in %s retrieval function", "tRNS");␍␊ |
| 999 | ␍␊ |
| 1000 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)␍␊ |
| 1001 | {␍␊ |
| 1002 | if (trans_alpha != NULL)␍␊ |
| 1003 | {␍␊ |
| 1004 | *trans_alpha = info_ptr->trans_alpha;␍␊ |
| 1005 | retval |= PNG_INFO_tRNS;␍␊ |
| 1006 | }␍␊ |
| 1007 | ␍␊ |
| 1008 | if (trans_color != NULL)␍␊ |
| 1009 | *trans_color = &(info_ptr->trans_color);␍␊ |
| 1010 | }␍␊ |
| 1011 | ␍␊ |
| 1012 | else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */␍␊ |
| 1013 | {␍␊ |
| 1014 | if (trans_color != NULL)␍␊ |
| 1015 | {␍␊ |
| 1016 | *trans_color = &(info_ptr->trans_color);␍␊ |
| 1017 | retval |= PNG_INFO_tRNS;␍␊ |
| 1018 | }␍␊ |
| 1019 | ␍␊ |
| 1020 | if (trans_alpha != NULL)␍␊ |
| 1021 | *trans_alpha = NULL;␍␊ |
| 1022 | }␍␊ |
| 1023 | ␍␊ |
| 1024 | if (num_trans != NULL)␍␊ |
| 1025 | {␍␊ |
| 1026 | *num_trans = info_ptr->num_trans;␍␊ |
| 1027 | retval |= PNG_INFO_tRNS;␍␊ |
| 1028 | }␍␊ |
| 1029 | }␍␊ |
| 1030 | ␍␊ |
| 1031 | return (retval);␍␊ |
| 1032 | }␍␊ |
| 1033 | #endif␍␊ |
| 1034 | ␍␊ |
| 1035 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED␍␊ |
| 1036 | int PNGAPI␍␊ |
| 1037 | png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr,␍␊ |
| 1038 | png_unknown_chunkpp unknowns)␍␊ |
| 1039 | {␍␊ |
| 1040 | if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)␍␊ |
| 1041 | {␍␊ |
| 1042 | *unknowns = info_ptr->unknown_chunks;␍␊ |
| 1043 | return info_ptr->unknown_chunks_num;␍␊ |
| 1044 | }␍␊ |
| 1045 | ␍␊ |
| 1046 | return (0);␍␊ |
| 1047 | }␍␊ |
| 1048 | #endif␍␊ |
| 1049 | ␍␊ |
| 1050 | #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED␍␊ |
| 1051 | png_byte PNGAPI␍␊ |
| 1052 | png_get_rgb_to_gray_status (png_const_structp png_ptr)␍␊ |
| 1053 | {␍␊ |
| 1054 | return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0);␍␊ |
| 1055 | }␍␊ |
| 1056 | #endif␍␊ |
| 1057 | ␍␊ |
| 1058 | #ifdef PNG_USER_CHUNKS_SUPPORTED␍␊ |
| 1059 | png_voidp PNGAPI␍␊ |
| 1060 | png_get_user_chunk_ptr(png_const_structp png_ptr)␍␊ |
| 1061 | {␍␊ |
| 1062 | return (png_ptr ? png_ptr->user_chunk_ptr : NULL);␍␊ |
| 1063 | }␍␊ |
| 1064 | #endif␍␊ |
| 1065 | ␍␊ |
| 1066 | png_size_t PNGAPI␍␊ |
| 1067 | png_get_compression_buffer_size(png_const_structp png_ptr)␍␊ |
| 1068 | {␍␊ |
| 1069 | return (png_ptr ? png_ptr->zbuf_size : 0);␍␊ |
| 1070 | }␍␊ |
| 1071 | ␍␊ |
| 1072 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED␍␊ |
| 1073 | /* These functions were added to libpng 1.2.6 and were enabled␍␊ |
| 1074 | * by default in libpng-1.4.0 */␍␊ |
| 1075 | png_uint_32 PNGAPI␍␊ |
| 1076 | png_get_user_width_max (png_const_structp png_ptr)␍␊ |
| 1077 | {␍␊ |
| 1078 | return (png_ptr ? png_ptr->user_width_max : 0);␍␊ |
| 1079 | }␍␊ |
| 1080 | ␍␊ |
| 1081 | png_uint_32 PNGAPI␍␊ |
| 1082 | png_get_user_height_max (png_const_structp png_ptr)␍␊ |
| 1083 | {␍␊ |
| 1084 | return (png_ptr ? png_ptr->user_height_max : 0);␍␊ |
| 1085 | }␍␊ |
| 1086 | ␍␊ |
| 1087 | /* This function was added to libpng 1.4.0 */␍␊ |
| 1088 | png_uint_32 PNGAPI␍␊ |
| 1089 | png_get_chunk_cache_max (png_const_structp png_ptr)␍␊ |
| 1090 | {␍␊ |
| 1091 | return (png_ptr ? png_ptr->user_chunk_cache_max : 0);␍␊ |
| 1092 | }␍␊ |
| 1093 | ␍␊ |
| 1094 | /* This function was added to libpng 1.4.1 */␍␊ |
| 1095 | png_alloc_size_t PNGAPI␍␊ |
| 1096 | png_get_chunk_malloc_max (png_const_structp png_ptr)␍␊ |
| 1097 | {␍␊ |
| 1098 | return (png_ptr ? png_ptr->user_chunk_malloc_max : 0);␍␊ |
| 1099 | }␍␊ |
| 1100 | #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */␍␊ |
| 1101 | ␍␊ |
| 1102 | /* These functions were added to libpng 1.4.0 */␍␊ |
| 1103 | #ifdef PNG_IO_STATE_SUPPORTED␍␊ |
| 1104 | png_uint_32 PNGAPI␍␊ |
| 1105 | png_get_io_state (png_structp png_ptr)␍␊ |
| 1106 | {␍␊ |
| 1107 | return png_ptr->io_state;␍␊ |
| 1108 | }␍␊ |
| 1109 | ␍␊ |
| 1110 | png_uint_32 PNGAPI␍␊ |
| 1111 | png_get_io_chunk_type (png_const_structp png_ptr)␍␊ |
| 1112 | {␍␊ |
| 1113 | return png_ptr->chunk_name;␍␊ |
| 1114 | }␍␊ |
| 1115 | ␍␊ |
| 1116 | png_const_bytep PNGAPI␍␊ |
| 1117 | png_get_io_chunk_name (png_structp png_ptr)␍␊ |
| 1118 | {␍␊ |
| 1119 | PNG_CSTRING_FROM_CHUNK(png_ptr->io_chunk_string, png_ptr->chunk_name);␍␊ |
| 1120 | return png_ptr->io_chunk_string;␍␊ |
| 1121 | }␍␊ |
| 1122 | #endif /* ?PNG_IO_STATE_SUPPORTED */␍␊ |
| 1123 | ␍␊ |
| 1124 | #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */␍␊ |
| 1125 | |
