| 1 | ␍␊ |
| 2 | /* pngset.c - storage of image information into info struct␍␊ |
| 3 | *␍␊ |
| 4 | * Last changed in libpng 1.5.11 [June 14, 2012]␍␊ |
| 5 | * Copyright (c) 1998-2012 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 | * The functions here are used during reads to store data from the file␍␊ |
| 14 | * into the info struct, and during writes to store application data␍␊ |
| 15 | * into the info struct for writing into the file. This abstracts the␍␊ |
| 16 | * info struct and allows us to change the structure in the future.␍␊ |
| 17 | */␍␊ |
| 18 | ␍␊ |
| 19 | #include "pngpriv.h"␍␊ |
| 20 | ␍␊ |
| 21 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)␍␊ |
| 22 | ␍␊ |
| 23 | #ifdef PNG_bKGD_SUPPORTED␍␊ |
| 24 | void PNGAPI␍␊ |
| 25 | png_set_bKGD(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 26 | png_const_color_16p background)␍␊ |
| 27 | {␍␊ |
| 28 | png_debug1(1, "in %s storage function", "bKGD");␍␊ |
| 29 | ␍␊ |
| 30 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 31 | return;␍␊ |
| 32 | ␍␊ |
| 33 | png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));␍␊ |
| 34 | info_ptr->valid |= PNG_INFO_bKGD;␍␊ |
| 35 | }␍␊ |
| 36 | #endif␍␊ |
| 37 | ␍␊ |
| 38 | #ifdef PNG_cHRM_SUPPORTED␍␊ |
| 39 | void PNGFAPI␍␊ |
| 40 | png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 41 | png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,␍␊ |
| 42 | png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,␍␊ |
| 43 | png_fixed_point blue_x, png_fixed_point blue_y)␍␊ |
| 44 | {␍␊ |
| 45 | png_debug1(1, "in %s storage function", "cHRM fixed");␍␊ |
| 46 | ␍␊ |
| 47 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 48 | return;␍␊ |
| 49 | ␍␊ |
| 50 | # ifdef PNG_CHECK_cHRM_SUPPORTED␍␊ |
| 51 | if (png_check_cHRM_fixed(png_ptr,␍␊ |
| 52 | white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))␍␊ |
| 53 | # endif␍␊ |
| 54 | {␍␊ |
| 55 | info_ptr->x_white = white_x;␍␊ |
| 56 | info_ptr->y_white = white_y;␍␊ |
| 57 | info_ptr->x_red = red_x;␍␊ |
| 58 | info_ptr->y_red = red_y;␍␊ |
| 59 | info_ptr->x_green = green_x;␍␊ |
| 60 | info_ptr->y_green = green_y;␍␊ |
| 61 | info_ptr->x_blue = blue_x;␍␊ |
| 62 | info_ptr->y_blue = blue_y;␍␊ |
| 63 | info_ptr->valid |= PNG_INFO_cHRM;␍␊ |
| 64 | }␍␊ |
| 65 | }␍␊ |
| 66 | ␍␊ |
| 67 | void PNGFAPI␍␊ |
| 68 | png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 69 | png_fixed_point int_red_X, png_fixed_point int_red_Y,␍␊ |
| 70 | png_fixed_point int_red_Z, png_fixed_point int_green_X,␍␊ |
| 71 | png_fixed_point int_green_Y, png_fixed_point int_green_Z,␍␊ |
| 72 | png_fixed_point int_blue_X, png_fixed_point int_blue_Y,␍␊ |
| 73 | png_fixed_point int_blue_Z)␍␊ |
| 74 | {␍␊ |
| 75 | png_XYZ XYZ;␍␊ |
| 76 | png_xy xy;␍␊ |
| 77 | ␍␊ |
| 78 | png_debug1(1, "in %s storage function", "cHRM XYZ fixed");␍␊ |
| 79 | ␍␊ |
| 80 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 81 | return;␍␊ |
| 82 | ␍␊ |
| 83 | XYZ.redX = int_red_X;␍␊ |
| 84 | XYZ.redY = int_red_Y;␍␊ |
| 85 | XYZ.redZ = int_red_Z;␍␊ |
| 86 | XYZ.greenX = int_green_X;␍␊ |
| 87 | XYZ.greenY = int_green_Y;␍␊ |
| 88 | XYZ.greenZ = int_green_Z;␍␊ |
| 89 | XYZ.blueX = int_blue_X;␍␊ |
| 90 | XYZ.blueY = int_blue_Y;␍␊ |
| 91 | XYZ.blueZ = int_blue_Z;␍␊ |
| 92 | ␍␊ |
| 93 | if (png_xy_from_XYZ(&xy, XYZ))␍␊ |
| 94 | png_error(png_ptr, "XYZ values out of representable range");␍␊ |
| 95 | ␍␊ |
| 96 | png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy,␍␊ |
| 97 | xy.greenx, xy.greeny, xy.bluex, xy.bluey);␍␊ |
| 98 | }␍␊ |
| 99 | ␍␊ |
| 100 | # ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 101 | void PNGAPI␍␊ |
| 102 | png_set_cHRM(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 103 | double white_x, double white_y, double red_x, double red_y,␍␊ |
| 104 | double green_x, double green_y, double blue_x, double blue_y)␍␊ |
| 105 | {␍␊ |
| 106 | png_set_cHRM_fixed(png_ptr, info_ptr,␍␊ |
| 107 | png_fixed(png_ptr, white_x, "cHRM White X"),␍␊ |
| 108 | png_fixed(png_ptr, white_y, "cHRM White Y"),␍␊ |
| 109 | png_fixed(png_ptr, red_x, "cHRM Red X"),␍␊ |
| 110 | png_fixed(png_ptr, red_y, "cHRM Red Y"),␍␊ |
| 111 | png_fixed(png_ptr, green_x, "cHRM Green X"),␍␊ |
| 112 | png_fixed(png_ptr, green_y, "cHRM Green Y"),␍␊ |
| 113 | png_fixed(png_ptr, blue_x, "cHRM Blue X"),␍␊ |
| 114 | png_fixed(png_ptr, blue_y, "cHRM Blue Y"));␍␊ |
| 115 | }␍␊ |
| 116 | ␍␊ |
| 117 | void PNGAPI␍␊ |
| 118 | png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X,␍␊ |
| 119 | double red_Y, double red_Z, double green_X, double green_Y, double green_Z,␍␊ |
| 120 | double blue_X, double blue_Y, double blue_Z)␍␊ |
| 121 | {␍␊ |
| 122 | png_set_cHRM_XYZ_fixed(png_ptr, info_ptr,␍␊ |
| 123 | png_fixed(png_ptr, red_X, "cHRM Red X"),␍␊ |
| 124 | png_fixed(png_ptr, red_Y, "cHRM Red Y"),␍␊ |
| 125 | png_fixed(png_ptr, red_Z, "cHRM Red Z"),␍␊ |
| 126 | png_fixed(png_ptr, green_X, "cHRM Red X"),␍␊ |
| 127 | png_fixed(png_ptr, green_Y, "cHRM Red Y"),␍␊ |
| 128 | png_fixed(png_ptr, green_Z, "cHRM Red Z"),␍␊ |
| 129 | png_fixed(png_ptr, blue_X, "cHRM Red X"),␍␊ |
| 130 | png_fixed(png_ptr, blue_Y, "cHRM Red Y"),␍␊ |
| 131 | png_fixed(png_ptr, blue_Z, "cHRM Red Z"));␍␊ |
| 132 | }␍␊ |
| 133 | # endif /* PNG_FLOATING_POINT_SUPPORTED */␍␊ |
| 134 | ␍␊ |
| 135 | #endif /* PNG_cHRM_SUPPORTED */␍␊ |
| 136 | ␍␊ |
| 137 | #ifdef PNG_gAMA_SUPPORTED␍␊ |
| 138 | void PNGFAPI␍␊ |
| 139 | png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point␍␊ |
| 140 | file_gamma)␍␊ |
| 141 | {␍␊ |
| 142 | png_debug1(1, "in %s storage function", "gAMA");␍␊ |
| 143 | ␍␊ |
| 144 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 145 | return;␍␊ |
| 146 | ␍␊ |
| 147 | /* Changed in libpng-1.5.4 to limit the values to ensure overflow can't␍␊ |
| 148 | * occur. Since the fixed point representation is assymetrical it is␍␊ |
| 149 | * possible for 1/gamma to overflow the limit of 21474 and this means the␍␊ |
| 150 | * gamma value must be at least 5/100000 and hence at most 20000.0. For␍␊ |
| 151 | * safety the limits here are a little narrower. The values are 0.00016 to␍␊ |
| 152 | * 6250.0, which are truly ridiculous gamma values (and will produce␍␊ |
| 153 | * displays that are all black or all white.)␍␊ |
| 154 | */␍␊ |
| 155 | if (file_gamma < 16 || file_gamma > 625000000)␍␊ |
| 156 | png_warning(png_ptr, "Out of range gamma value ignored");␍␊ |
| 157 | ␍␊ |
| 158 | else␍␊ |
| 159 | {␍␊ |
| 160 | info_ptr->gamma = file_gamma;␍␊ |
| 161 | info_ptr->valid |= PNG_INFO_gAMA;␍␊ |
| 162 | }␍␊ |
| 163 | }␍␊ |
| 164 | ␍␊ |
| 165 | # ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 166 | void PNGAPI␍␊ |
| 167 | png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)␍␊ |
| 168 | {␍␊ |
| 169 | png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma,␍␊ |
| 170 | "png_set_gAMA"));␍␊ |
| 171 | }␍␊ |
| 172 | # endif␍␊ |
| 173 | #endif␍␊ |
| 174 | ␍␊ |
| 175 | #ifdef PNG_hIST_SUPPORTED␍␊ |
| 176 | void PNGAPI␍␊ |
| 177 | png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist)␍␊ |
| 178 | {␍␊ |
| 179 | int i;␍␊ |
| 180 | ␍␊ |
| 181 | png_debug1(1, "in %s storage function", "hIST");␍␊ |
| 182 | ␍␊ |
| 183 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 184 | return;␍␊ |
| 185 | ␍␊ |
| 186 | if (info_ptr->num_palette == 0 || info_ptr->num_palette␍␊ |
| 187 | > PNG_MAX_PALETTE_LENGTH)␍␊ |
| 188 | {␍␊ |
| 189 | png_warning(png_ptr,␍␊ |
| 190 | "Invalid palette size, hIST allocation skipped");␍␊ |
| 191 | ␍␊ |
| 192 | return;␍␊ |
| 193 | }␍␊ |
| 194 | ␍␊ |
| 195 | png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);␍␊ |
| 196 | ␍␊ |
| 197 | /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in␍␊ |
| 198 | * version 1.2.1␍␊ |
| 199 | */␍␊ |
| 200 | png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,␍␊ |
| 201 | PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));␍␊ |
| 202 | ␍␊ |
| 203 | if (png_ptr->hist == NULL)␍␊ |
| 204 | {␍␊ |
| 205 | png_warning(png_ptr, "Insufficient memory for hIST chunk data");␍␊ |
| 206 | return;␍␊ |
| 207 | }␍␊ |
| 208 | ␍␊ |
| 209 | for (i = 0; i < info_ptr->num_palette; i++)␍␊ |
| 210 | png_ptr->hist[i] = hist[i];␍␊ |
| 211 | ␍␊ |
| 212 | info_ptr->hist = png_ptr->hist;␍␊ |
| 213 | info_ptr->valid |= PNG_INFO_hIST;␍␊ |
| 214 | info_ptr->free_me |= PNG_FREE_HIST;␍␊ |
| 215 | }␍␊ |
| 216 | #endif␍␊ |
| 217 | ␍␊ |
| 218 | void PNGAPI␍␊ |
| 219 | png_set_IHDR(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 220 | png_uint_32 width, png_uint_32 height, int bit_depth,␍␊ |
| 221 | int color_type, int interlace_type, int compression_type,␍␊ |
| 222 | int filter_type)␍␊ |
| 223 | {␍␊ |
| 224 | png_debug1(1, "in %s storage function", "IHDR");␍␊ |
| 225 | ␍␊ |
| 226 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 227 | return;␍␊ |
| 228 | ␍␊ |
| 229 | info_ptr->width = width;␍␊ |
| 230 | info_ptr->height = height;␍␊ |
| 231 | info_ptr->bit_depth = (png_byte)bit_depth;␍␊ |
| 232 | info_ptr->color_type = (png_byte)color_type;␍␊ |
| 233 | info_ptr->compression_type = (png_byte)compression_type;␍␊ |
| 234 | info_ptr->filter_type = (png_byte)filter_type;␍␊ |
| 235 | info_ptr->interlace_type = (png_byte)interlace_type;␍␊ |
| 236 | ␍␊ |
| 237 | png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,␍␊ |
| 238 | info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,␍␊ |
| 239 | info_ptr->compression_type, info_ptr->filter_type);␍␊ |
| 240 | ␍␊ |
| 241 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)␍␊ |
| 242 | info_ptr->channels = 1;␍␊ |
| 243 | ␍␊ |
| 244 | else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)␍␊ |
| 245 | info_ptr->channels = 3;␍␊ |
| 246 | ␍␊ |
| 247 | else␍␊ |
| 248 | info_ptr->channels = 1;␍␊ |
| 249 | ␍␊ |
| 250 | if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)␍␊ |
| 251 | info_ptr->channels++;␍␊ |
| 252 | ␍␊ |
| 253 | info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);␍␊ |
| 254 | ␍␊ |
| 255 | /* Check for potential overflow */␍␊ |
| 256 | if (width >␍␊ |
| 257 | (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */␍␊ |
| 258 | - 48 /* bigrowbuf hack */␍␊ |
| 259 | - 1 /* filter byte */␍␊ |
| 260 | - 7*8 /* rounding of width to multiple of 8 pixels */␍␊ |
| 261 | - 8) /* extra max_pixel_depth pad */␍␊ |
| 262 | info_ptr->rowbytes = 0;␍␊ |
| 263 | else␍␊ |
| 264 | info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);␍␊ |
| 265 | }␍␊ |
| 266 | ␍␊ |
| 267 | #ifdef PNG_oFFs_SUPPORTED␍␊ |
| 268 | void PNGAPI␍␊ |
| 269 | png_set_oFFs(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 270 | png_int_32 offset_x, png_int_32 offset_y, int unit_type)␍␊ |
| 271 | {␍␊ |
| 272 | png_debug1(1, "in %s storage function", "oFFs");␍␊ |
| 273 | ␍␊ |
| 274 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 275 | return;␍␊ |
| 276 | ␍␊ |
| 277 | info_ptr->x_offset = offset_x;␍␊ |
| 278 | info_ptr->y_offset = offset_y;␍␊ |
| 279 | info_ptr->offset_unit_type = (png_byte)unit_type;␍␊ |
| 280 | info_ptr->valid |= PNG_INFO_oFFs;␍␊ |
| 281 | }␍␊ |
| 282 | #endif␍␊ |
| 283 | ␍␊ |
| 284 | #ifdef PNG_pCAL_SUPPORTED␍␊ |
| 285 | void PNGAPI␍␊ |
| 286 | png_set_pCAL(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 287 | png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,␍␊ |
| 288 | int nparams, png_const_charp units, png_charpp params)␍␊ |
| 289 | {␍␊ |
| 290 | png_size_t length;␍␊ |
| 291 | int i;␍␊ |
| 292 | ␍␊ |
| 293 | png_debug1(1, "in %s storage function", "pCAL");␍␊ |
| 294 | ␍␊ |
| 295 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 296 | return;␍␊ |
| 297 | ␍␊ |
| 298 | length = png_strlen(purpose) + 1;␍␊ |
| 299 | png_debug1(3, "allocating purpose for info (%lu bytes)",␍␊ |
| 300 | (unsigned long)length);␍␊ |
| 301 | ␍␊ |
| 302 | /* TODO: validate format of calibration name and unit name */␍␊ |
| 303 | ␍␊ |
| 304 | /* Check that the type matches the specification. */␍␊ |
| 305 | if (type < 0 || type > 3)␍␊ |
| 306 | png_error(png_ptr, "Invalid pCAL equation type");␍␊ |
| 307 | ␍␊ |
| 308 | /* Validate params[nparams] */␍␊ |
| 309 | for (i=0; i<nparams; ++i)␍␊ |
| 310 | if (!png_check_fp_string(params[i], png_strlen(params[i])))␍␊ |
| 311 | png_error(png_ptr, "Invalid format for pCAL parameter");␍␊ |
| 312 | ␍␊ |
| 313 | info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);␍␊ |
| 314 | ␍␊ |
| 315 | if (info_ptr->pcal_purpose == NULL)␍␊ |
| 316 | {␍␊ |
| 317 | png_warning(png_ptr, "Insufficient memory for pCAL purpose");␍␊ |
| 318 | return;␍␊ |
| 319 | }␍␊ |
| 320 | ␍␊ |
| 321 | png_memcpy(info_ptr->pcal_purpose, purpose, length);␍␊ |
| 322 | ␍␊ |
| 323 | png_debug(3, "storing X0, X1, type, and nparams in info");␍␊ |
| 324 | info_ptr->pcal_X0 = X0;␍␊ |
| 325 | info_ptr->pcal_X1 = X1;␍␊ |
| 326 | info_ptr->pcal_type = (png_byte)type;␍␊ |
| 327 | info_ptr->pcal_nparams = (png_byte)nparams;␍␊ |
| 328 | ␍␊ |
| 329 | length = png_strlen(units) + 1;␍␊ |
| 330 | png_debug1(3, "allocating units for info (%lu bytes)",␍␊ |
| 331 | (unsigned long)length);␍␊ |
| 332 | ␍␊ |
| 333 | info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);␍␊ |
| 334 | ␍␊ |
| 335 | if (info_ptr->pcal_units == NULL)␍␊ |
| 336 | {␍␊ |
| 337 | png_warning(png_ptr, "Insufficient memory for pCAL units");␍␊ |
| 338 | return;␍␊ |
| 339 | }␍␊ |
| 340 | ␍␊ |
| 341 | png_memcpy(info_ptr->pcal_units, units, length);␍␊ |
| 342 | ␍␊ |
| 343 | info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,␍␊ |
| 344 | (png_size_t)((nparams + 1) * png_sizeof(png_charp)));␍␊ |
| 345 | ␍␊ |
| 346 | if (info_ptr->pcal_params == NULL)␍␊ |
| 347 | {␍␊ |
| 348 | png_warning(png_ptr, "Insufficient memory for pCAL params");␍␊ |
| 349 | return;␍␊ |
| 350 | }␍␊ |
| 351 | ␍␊ |
| 352 | png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));␍␊ |
| 353 | ␍␊ |
| 354 | for (i = 0; i < nparams; i++)␍␊ |
| 355 | {␍␊ |
| 356 | length = png_strlen(params[i]) + 1;␍␊ |
| 357 | png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,␍␊ |
| 358 | (unsigned long)length);␍␊ |
| 359 | ␍␊ |
| 360 | info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);␍␊ |
| 361 | ␍␊ |
| 362 | if (info_ptr->pcal_params[i] == NULL)␍␊ |
| 363 | {␍␊ |
| 364 | png_warning(png_ptr, "Insufficient memory for pCAL parameter");␍␊ |
| 365 | return;␍␊ |
| 366 | }␍␊ |
| 367 | ␍␊ |
| 368 | png_memcpy(info_ptr->pcal_params[i], params[i], length);␍␊ |
| 369 | }␍␊ |
| 370 | ␍␊ |
| 371 | info_ptr->valid |= PNG_INFO_pCAL;␍␊ |
| 372 | info_ptr->free_me |= PNG_FREE_PCAL;␍␊ |
| 373 | }␍␊ |
| 374 | #endif␍␊ |
| 375 | ␍␊ |
| 376 | #ifdef PNG_sCAL_SUPPORTED␍␊ |
| 377 | void PNGAPI␍␊ |
| 378 | png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 379 | int unit, png_const_charp swidth, png_const_charp sheight)␍␊ |
| 380 | {␍␊ |
| 381 | png_size_t lengthw = 0, lengthh = 0;␍␊ |
| 382 | ␍␊ |
| 383 | png_debug1(1, "in %s storage function", "sCAL");␍␊ |
| 384 | ␍␊ |
| 385 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 386 | return;␍␊ |
| 387 | ␍␊ |
| 388 | /* Double check the unit (should never get here with an invalid␍␊ |
| 389 | * unit unless this is an API call.)␍␊ |
| 390 | */␍␊ |
| 391 | if (unit != 1 && unit != 2)␍␊ |
| 392 | png_error(png_ptr, "Invalid sCAL unit");␍␊ |
| 393 | ␍␊ |
| 394 | if (swidth == NULL || (lengthw = png_strlen(swidth)) == 0 ||␍␊ |
| 395 | swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw))␍␊ |
| 396 | png_error(png_ptr, "Invalid sCAL width");␍␊ |
| 397 | ␍␊ |
| 398 | if (sheight == NULL || (lengthh = png_strlen(sheight)) == 0 ||␍␊ |
| 399 | sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh))␍␊ |
| 400 | png_error(png_ptr, "Invalid sCAL height");␍␊ |
| 401 | ␍␊ |
| 402 | info_ptr->scal_unit = (png_byte)unit;␍␊ |
| 403 | ␍␊ |
| 404 | ++lengthw;␍␊ |
| 405 | ␍␊ |
| 406 | png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw);␍␊ |
| 407 | ␍␊ |
| 408 | info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw);␍␊ |
| 409 | ␍␊ |
| 410 | if (info_ptr->scal_s_width == NULL)␍␊ |
| 411 | {␍␊ |
| 412 | png_warning(png_ptr, "Memory allocation failed while processing sCAL");␍␊ |
| 413 | return;␍␊ |
| 414 | }␍␊ |
| 415 | ␍␊ |
| 416 | png_memcpy(info_ptr->scal_s_width, swidth, lengthw);␍␊ |
| 417 | ␍␊ |
| 418 | ++lengthh;␍␊ |
| 419 | ␍␊ |
| 420 | png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh);␍␊ |
| 421 | ␍␊ |
| 422 | info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh);␍␊ |
| 423 | ␍␊ |
| 424 | if (info_ptr->scal_s_height == NULL)␍␊ |
| 425 | {␍␊ |
| 426 | png_free (png_ptr, info_ptr->scal_s_width);␍␊ |
| 427 | info_ptr->scal_s_width = NULL;␍␊ |
| 428 | ␍␊ |
| 429 | png_warning(png_ptr, "Memory allocation failed while processing sCAL");␍␊ |
| 430 | return;␍␊ |
| 431 | }␍␊ |
| 432 | ␍␊ |
| 433 | png_memcpy(info_ptr->scal_s_height, sheight, lengthh);␍␊ |
| 434 | ␍␊ |
| 435 | info_ptr->valid |= PNG_INFO_sCAL;␍␊ |
| 436 | info_ptr->free_me |= PNG_FREE_SCAL;␍␊ |
| 437 | }␍␊ |
| 438 | ␍␊ |
| 439 | # ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 440 | void PNGAPI␍␊ |
| 441 | png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width,␍␊ |
| 442 | double height)␍␊ |
| 443 | {␍␊ |
| 444 | png_debug1(1, "in %s storage function", "sCAL");␍␊ |
| 445 | ␍␊ |
| 446 | /* Check the arguments. */␍␊ |
| 447 | if (width <= 0)␍␊ |
| 448 | png_warning(png_ptr, "Invalid sCAL width ignored");␍␊ |
| 449 | ␍␊ |
| 450 | else if (height <= 0)␍␊ |
| 451 | png_warning(png_ptr, "Invalid sCAL height ignored");␍␊ |
| 452 | ␍␊ |
| 453 | else␍␊ |
| 454 | {␍␊ |
| 455 | /* Convert 'width' and 'height' to ASCII. */␍␊ |
| 456 | char swidth[PNG_sCAL_MAX_DIGITS+1];␍␊ |
| 457 | char sheight[PNG_sCAL_MAX_DIGITS+1];␍␊ |
| 458 | ␍␊ |
| 459 | png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width,␍␊ |
| 460 | PNG_sCAL_PRECISION);␍␊ |
| 461 | png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height,␍␊ |
| 462 | PNG_sCAL_PRECISION);␍␊ |
| 463 | ␍␊ |
| 464 | png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);␍␊ |
| 465 | }␍␊ |
| 466 | }␍␊ |
| 467 | # endif␍␊ |
| 468 | ␍␊ |
| 469 | # ifdef PNG_FIXED_POINT_SUPPORTED␍␊ |
| 470 | void PNGAPI␍␊ |
| 471 | png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit,␍␊ |
| 472 | png_fixed_point width, png_fixed_point height)␍␊ |
| 473 | {␍␊ |
| 474 | png_debug1(1, "in %s storage function", "sCAL");␍␊ |
| 475 | ␍␊ |
| 476 | /* Check the arguments. */␍␊ |
| 477 | if (width <= 0)␍␊ |
| 478 | png_warning(png_ptr, "Invalid sCAL width ignored");␍␊ |
| 479 | ␍␊ |
| 480 | else if (height <= 0)␍␊ |
| 481 | png_warning(png_ptr, "Invalid sCAL height ignored");␍␊ |
| 482 | ␍␊ |
| 483 | else␍␊ |
| 484 | {␍␊ |
| 485 | /* Convert 'width' and 'height' to ASCII. */␍␊ |
| 486 | char swidth[PNG_sCAL_MAX_DIGITS+1];␍␊ |
| 487 | char sheight[PNG_sCAL_MAX_DIGITS+1];␍␊ |
| 488 | ␍␊ |
| 489 | png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width);␍␊ |
| 490 | png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height);␍␊ |
| 491 | ␍␊ |
| 492 | png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);␍␊ |
| 493 | }␍␊ |
| 494 | }␍␊ |
| 495 | # endif␍␊ |
| 496 | #endif␍␊ |
| 497 | ␍␊ |
| 498 | #ifdef PNG_pHYs_SUPPORTED␍␊ |
| 499 | void PNGAPI␍␊ |
| 500 | png_set_pHYs(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 501 | png_uint_32 res_x, png_uint_32 res_y, int unit_type)␍␊ |
| 502 | {␍␊ |
| 503 | png_debug1(1, "in %s storage function", "pHYs");␍␊ |
| 504 | ␍␊ |
| 505 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 506 | return;␍␊ |
| 507 | ␍␊ |
| 508 | info_ptr->x_pixels_per_unit = res_x;␍␊ |
| 509 | info_ptr->y_pixels_per_unit = res_y;␍␊ |
| 510 | info_ptr->phys_unit_type = (png_byte)unit_type;␍␊ |
| 511 | info_ptr->valid |= PNG_INFO_pHYs;␍␊ |
| 512 | }␍␊ |
| 513 | #endif␍␊ |
| 514 | ␍␊ |
| 515 | void PNGAPI␍␊ |
| 516 | png_set_PLTE(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 517 | png_const_colorp palette, int num_palette)␍␊ |
| 518 | {␍␊ |
| 519 | ␍␊ |
| 520 | png_debug1(1, "in %s storage function", "PLTE");␍␊ |
| 521 | ␍␊ |
| 522 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 523 | return;␍␊ |
| 524 | ␍␊ |
| 525 | if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)␍␊ |
| 526 | {␍␊ |
| 527 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)␍␊ |
| 528 | png_error(png_ptr, "Invalid palette length");␍␊ |
| 529 | ␍␊ |
| 530 | else␍␊ |
| 531 | {␍␊ |
| 532 | png_warning(png_ptr, "Invalid palette length");␍␊ |
| 533 | return;␍␊ |
| 534 | }␍␊ |
| 535 | }␍␊ |
| 536 | ␍␊ |
| 537 | /* It may not actually be necessary to set png_ptr->palette here;␍␊ |
| 538 | * we do it for backward compatibility with the way the png_handle_tRNS␍␊ |
| 539 | * function used to do the allocation.␍␊ |
| 540 | */␍␊ |
| 541 | png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);␍␊ |
| 542 | ␍␊ |
| 543 | /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead␍␊ |
| 544 | * of num_palette entries, in case of an invalid PNG file that has␍␊ |
| 545 | * too-large sample values.␍␊ |
| 546 | */␍␊ |
| 547 | png_ptr->palette = (png_colorp)png_calloc(png_ptr,␍␊ |
| 548 | PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));␍␊ |
| 549 | ␍␊ |
| 550 | png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));␍␊ |
| 551 | info_ptr->palette = png_ptr->palette;␍␊ |
| 552 | info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;␍␊ |
| 553 | ␍␊ |
| 554 | info_ptr->free_me |= PNG_FREE_PLTE;␍␊ |
| 555 | ␍␊ |
| 556 | info_ptr->valid |= PNG_INFO_PLTE;␍␊ |
| 557 | }␍␊ |
| 558 | ␍␊ |
| 559 | #ifdef PNG_sBIT_SUPPORTED␍␊ |
| 560 | void PNGAPI␍␊ |
| 561 | png_set_sBIT(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 562 | png_const_color_8p sig_bit)␍␊ |
| 563 | {␍␊ |
| 564 | png_debug1(1, "in %s storage function", "sBIT");␍␊ |
| 565 | ␍␊ |
| 566 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 567 | return;␍␊ |
| 568 | ␍␊ |
| 569 | png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));␍␊ |
| 570 | info_ptr->valid |= PNG_INFO_sBIT;␍␊ |
| 571 | }␍␊ |
| 572 | #endif␍␊ |
| 573 | ␍␊ |
| 574 | #ifdef PNG_sRGB_SUPPORTED␍␊ |
| 575 | void PNGAPI␍␊ |
| 576 | png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent)␍␊ |
| 577 | {␍␊ |
| 578 | png_debug1(1, "in %s storage function", "sRGB");␍␊ |
| 579 | ␍␊ |
| 580 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 581 | return;␍␊ |
| 582 | ␍␊ |
| 583 | info_ptr->srgb_intent = (png_byte)srgb_intent;␍␊ |
| 584 | info_ptr->valid |= PNG_INFO_sRGB;␍␊ |
| 585 | }␍␊ |
| 586 | ␍␊ |
| 587 | void PNGAPI␍␊ |
| 588 | png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 589 | int srgb_intent)␍␊ |
| 590 | {␍␊ |
| 591 | png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");␍␊ |
| 592 | ␍␊ |
| 593 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 594 | return;␍␊ |
| 595 | ␍␊ |
| 596 | png_set_sRGB(png_ptr, info_ptr, srgb_intent);␍␊ |
| 597 | ␍␊ |
| 598 | # ifdef PNG_gAMA_SUPPORTED␍␊ |
| 599 | png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE);␍␊ |
| 600 | # endif␍␊ |
| 601 | ␍␊ |
| 602 | # ifdef PNG_cHRM_SUPPORTED␍␊ |
| 603 | png_set_cHRM_fixed(png_ptr, info_ptr,␍␊ |
| 604 | /* color x y */␍␊ |
| 605 | /* white */ 31270, 32900,␍␊ |
| 606 | /* red */ 64000, 33000,␍␊ |
| 607 | /* green */ 30000, 60000,␍␊ |
| 608 | /* blue */ 15000, 6000␍␊ |
| 609 | );␍␊ |
| 610 | # endif /* cHRM */␍␊ |
| 611 | }␍␊ |
| 612 | #endif /* sRGB */␍␊ |
| 613 | ␍␊ |
| 614 | ␍␊ |
| 615 | #ifdef PNG_iCCP_SUPPORTED␍␊ |
| 616 | void PNGAPI␍␊ |
| 617 | png_set_iCCP(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 618 | png_const_charp name, int compression_type,␍␊ |
| 619 | png_const_bytep profile, png_uint_32 proflen)␍␊ |
| 620 | {␍␊ |
| 621 | png_charp new_iccp_name;␍␊ |
| 622 | png_bytep new_iccp_profile;␍␊ |
| 623 | png_size_t length;␍␊ |
| 624 | ␍␊ |
| 625 | png_debug1(1, "in %s storage function", "iCCP");␍␊ |
| 626 | ␍␊ |
| 627 | if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)␍␊ |
| 628 | return;␍␊ |
| 629 | ␍␊ |
| 630 | length = png_strlen(name)+1;␍␊ |
| 631 | new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);␍␊ |
| 632 | ␍␊ |
| 633 | if (new_iccp_name == NULL)␍␊ |
| 634 | {␍␊ |
| 635 | png_warning(png_ptr, "Insufficient memory to process iCCP chunk");␍␊ |
| 636 | return;␍␊ |
| 637 | }␍␊ |
| 638 | ␍␊ |
| 639 | png_memcpy(new_iccp_name, name, length);␍␊ |
| 640 | new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen);␍␊ |
| 641 | ␍␊ |
| 642 | if (new_iccp_profile == NULL)␍␊ |
| 643 | {␍␊ |
| 644 | png_free (png_ptr, new_iccp_name);␍␊ |
| 645 | png_warning(png_ptr,␍␊ |
| 646 | "Insufficient memory to process iCCP profile");␍␊ |
| 647 | return;␍␊ |
| 648 | }␍␊ |
| 649 | ␍␊ |
| 650 | png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);␍␊ |
| 651 | ␍␊ |
| 652 | png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);␍␊ |
| 653 | ␍␊ |
| 654 | info_ptr->iccp_proflen = proflen;␍␊ |
| 655 | info_ptr->iccp_name = new_iccp_name;␍␊ |
| 656 | info_ptr->iccp_profile = new_iccp_profile;␍␊ |
| 657 | /* Compression is always zero but is here so the API and info structure␍␊ |
| 658 | * does not have to change if we introduce multiple compression types␍␊ |
| 659 | */␍␊ |
| 660 | info_ptr->iccp_compression = (png_byte)compression_type;␍␊ |
| 661 | info_ptr->free_me |= PNG_FREE_ICCP;␍␊ |
| 662 | info_ptr->valid |= PNG_INFO_iCCP;␍␊ |
| 663 | }␍␊ |
| 664 | #endif␍␊ |
| 665 | ␍␊ |
| 666 | #ifdef PNG_TEXT_SUPPORTED␍␊ |
| 667 | void PNGAPI␍␊ |
| 668 | png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr,␍␊ |
| 669 | int num_text)␍␊ |
| 670 | {␍␊ |
| 671 | int ret;␍␊ |
| 672 | ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);␍␊ |
| 673 | ␍␊ |
| 674 | if (ret)␍␊ |
| 675 | png_error(png_ptr, "Insufficient memory to store text");␍␊ |
| 676 | }␍␊ |
| 677 | ␍␊ |
| 678 | int /* PRIVATE */␍␊ |
| 679 | png_set_text_2(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 680 | png_const_textp text_ptr, int num_text)␍␊ |
| 681 | {␍␊ |
| 682 | int i;␍␊ |
| 683 | ␍␊ |
| 684 | png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" :␍␊ |
| 685 | (unsigned long)png_ptr->chunk_name);␍␊ |
| 686 | ␍␊ |
| 687 | if (png_ptr == NULL || info_ptr == NULL || num_text == 0)␍␊ |
| 688 | return(0);␍␊ |
| 689 | ␍␊ |
| 690 | /* Make sure we have enough space in the "text" array in info_struct␍␊ |
| 691 | * to hold all of the incoming text_ptr objects.␍␊ |
| 692 | */␍␊ |
| 693 | if (info_ptr->num_text + num_text > info_ptr->max_text)␍␊ |
| 694 | {␍␊ |
| 695 | int old_max_text = info_ptr->max_text;␍␊ |
| 696 | int old_num_text = info_ptr->num_text;␍␊ |
| 697 | ␍␊ |
| 698 | if (info_ptr->text != NULL)␍␊ |
| 699 | {␍␊ |
| 700 | png_textp old_text;␍␊ |
| 701 | ␍␊ |
| 702 | info_ptr->max_text = info_ptr->num_text + num_text + 8;␍␊ |
| 703 | old_text = info_ptr->text;␍␊ |
| 704 | ␍␊ |
| 705 | info_ptr->text = (png_textp)png_malloc_warn(png_ptr,␍␊ |
| 706 | (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));␍␊ |
| 707 | ␍␊ |
| 708 | if (info_ptr->text == NULL)␍␊ |
| 709 | {␍␊ |
| 710 | /* Restore to previous condition */␍␊ |
| 711 | info_ptr->max_text = old_max_text;␍␊ |
| 712 | info_ptr->text = old_text;␍␊ |
| 713 | return(1);␍␊ |
| 714 | }␍␊ |
| 715 | ␍␊ |
| 716 | png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text *␍␊ |
| 717 | png_sizeof(png_text)));␍␊ |
| 718 | png_free(png_ptr, old_text);␍␊ |
| 719 | }␍␊ |
| 720 | ␍␊ |
| 721 | else␍␊ |
| 722 | {␍␊ |
| 723 | info_ptr->max_text = num_text + 8;␍␊ |
| 724 | info_ptr->num_text = 0;␍␊ |
| 725 | info_ptr->text = (png_textp)png_malloc_warn(png_ptr,␍␊ |
| 726 | (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));␍␊ |
| 727 | if (info_ptr->text == NULL)␍␊ |
| 728 | {␍␊ |
| 729 | /* Restore to previous condition */␍␊ |
| 730 | info_ptr->num_text = old_num_text;␍␊ |
| 731 | info_ptr->max_text = old_max_text;␍␊ |
| 732 | return(1);␍␊ |
| 733 | }␍␊ |
| 734 | info_ptr->free_me |= PNG_FREE_TEXT;␍␊ |
| 735 | }␍␊ |
| 736 | ␍␊ |
| 737 | png_debug1(3, "allocated %d entries for info_ptr->text",␍␊ |
| 738 | info_ptr->max_text);␍␊ |
| 739 | }␍␊ |
| 740 | for (i = 0; i < num_text; i++)␍␊ |
| 741 | {␍␊ |
| 742 | png_size_t text_length, key_len;␍␊ |
| 743 | png_size_t lang_len, lang_key_len;␍␊ |
| 744 | png_textp textp = &(info_ptr->text[info_ptr->num_text]);␍␊ |
| 745 | ␍␊ |
| 746 | if (text_ptr[i].key == NULL)␍␊ |
| 747 | continue;␍␊ |
| 748 | ␍␊ |
| 749 | if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||␍␊ |
| 750 | text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)␍␊ |
| 751 | {␍␊ |
| 752 | png_warning(png_ptr, "text compression mode is out of range");␍␊ |
| 753 | continue;␍␊ |
| 754 | }␍␊ |
| 755 | ␍␊ |
| 756 | key_len = png_strlen(text_ptr[i].key);␍␊ |
| 757 | ␍␊ |
| 758 | if (text_ptr[i].compression <= 0)␍␊ |
| 759 | {␍␊ |
| 760 | lang_len = 0;␍␊ |
| 761 | lang_key_len = 0;␍␊ |
| 762 | }␍␊ |
| 763 | ␍␊ |
| 764 | else␍␊ |
| 765 | # ifdef PNG_iTXt_SUPPORTED␍␊ |
| 766 | {␍␊ |
| 767 | /* Set iTXt data */␍␊ |
| 768 | ␍␊ |
| 769 | if (text_ptr[i].lang != NULL)␍␊ |
| 770 | lang_len = png_strlen(text_ptr[i].lang);␍␊ |
| 771 | ␍␊ |
| 772 | else␍␊ |
| 773 | lang_len = 0;␍␊ |
| 774 | ␍␊ |
| 775 | if (text_ptr[i].lang_key != NULL)␍␊ |
| 776 | lang_key_len = png_strlen(text_ptr[i].lang_key);␍␊ |
| 777 | ␍␊ |
| 778 | else␍␊ |
| 779 | lang_key_len = 0;␍␊ |
| 780 | }␍␊ |
| 781 | # else /* PNG_iTXt_SUPPORTED */␍␊ |
| 782 | {␍␊ |
| 783 | png_warning(png_ptr, "iTXt chunk not supported");␍␊ |
| 784 | continue;␍␊ |
| 785 | }␍␊ |
| 786 | # endif␍␊ |
| 787 | ␍␊ |
| 788 | if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')␍␊ |
| 789 | {␍␊ |
| 790 | text_length = 0;␍␊ |
| 791 | # ifdef PNG_iTXt_SUPPORTED␍␊ |
| 792 | if (text_ptr[i].compression > 0)␍␊ |
| 793 | textp->compression = PNG_ITXT_COMPRESSION_NONE;␍␊ |
| 794 | ␍␊ |
| 795 | else␍␊ |
| 796 | # endif␍␊ |
| 797 | textp->compression = PNG_TEXT_COMPRESSION_NONE;␍␊ |
| 798 | }␍␊ |
| 799 | ␍␊ |
| 800 | else␍␊ |
| 801 | {␍␊ |
| 802 | text_length = png_strlen(text_ptr[i].text);␍␊ |
| 803 | textp->compression = text_ptr[i].compression;␍␊ |
| 804 | }␍␊ |
| 805 | ␍␊ |
| 806 | textp->key = (png_charp)png_malloc_warn(png_ptr,␍␊ |
| 807 | (png_size_t)␍␊ |
| 808 | (key_len + text_length + lang_len + lang_key_len + 4));␍␊ |
| 809 | ␍␊ |
| 810 | if (textp->key == NULL)␍␊ |
| 811 | return(1);␍␊ |
| 812 | ␍␊ |
| 813 | png_debug2(2, "Allocated %lu bytes at %p in png_set_text",␍␊ |
| 814 | (unsigned long)(png_uint_32)␍␊ |
| 815 | (key_len + lang_len + lang_key_len + text_length + 4),␍␊ |
| 816 | textp->key);␍␊ |
| 817 | ␍␊ |
| 818 | png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));␍␊ |
| 819 | *(textp->key + key_len) = '\0';␍␊ |
| 820 | ␍␊ |
| 821 | if (text_ptr[i].compression > 0)␍␊ |
| 822 | {␍␊ |
| 823 | textp->lang = textp->key + key_len + 1;␍␊ |
| 824 | png_memcpy(textp->lang, text_ptr[i].lang, lang_len);␍␊ |
| 825 | *(textp->lang + lang_len) = '\0';␍␊ |
| 826 | textp->lang_key = textp->lang + lang_len + 1;␍␊ |
| 827 | png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);␍␊ |
| 828 | *(textp->lang_key + lang_key_len) = '\0';␍␊ |
| 829 | textp->text = textp->lang_key + lang_key_len + 1;␍␊ |
| 830 | }␍␊ |
| 831 | ␍␊ |
| 832 | else␍␊ |
| 833 | {␍␊ |
| 834 | textp->lang=NULL;␍␊ |
| 835 | textp->lang_key=NULL;␍␊ |
| 836 | textp->text = textp->key + key_len + 1;␍␊ |
| 837 | }␍␊ |
| 838 | ␍␊ |
| 839 | if (text_length)␍␊ |
| 840 | png_memcpy(textp->text, text_ptr[i].text,␍␊ |
| 841 | (png_size_t)(text_length));␍␊ |
| 842 | ␍␊ |
| 843 | *(textp->text + text_length) = '\0';␍␊ |
| 844 | ␍␊ |
| 845 | # ifdef PNG_iTXt_SUPPORTED␍␊ |
| 846 | if (textp->compression > 0)␍␊ |
| 847 | {␍␊ |
| 848 | textp->text_length = 0;␍␊ |
| 849 | textp->itxt_length = text_length;␍␊ |
| 850 | }␍␊ |
| 851 | ␍␊ |
| 852 | else␍␊ |
| 853 | # endif␍␊ |
| 854 | {␍␊ |
| 855 | textp->text_length = text_length;␍␊ |
| 856 | textp->itxt_length = 0;␍␊ |
| 857 | }␍␊ |
| 858 | ␍␊ |
| 859 | info_ptr->num_text++;␍␊ |
| 860 | png_debug1(3, "transferred text chunk %d", info_ptr->num_text);␍␊ |
| 861 | }␍␊ |
| 862 | return(0);␍␊ |
| 863 | }␍␊ |
| 864 | #endif␍␊ |
| 865 | ␍␊ |
| 866 | #ifdef PNG_tIME_SUPPORTED␍␊ |
| 867 | void PNGAPI␍␊ |
| 868 | png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)␍␊ |
| 869 | {␍␊ |
| 870 | png_debug1(1, "in %s storage function", "tIME");␍␊ |
| 871 | ␍␊ |
| 872 | if (png_ptr == NULL || info_ptr == NULL ||␍␊ |
| 873 | (png_ptr->mode & PNG_WROTE_tIME))␍␊ |
| 874 | return;␍␊ |
| 875 | ␍␊ |
| 876 | if (mod_time->month == 0 || mod_time->month > 12 ||␍␊ |
| 877 | mod_time->day == 0 || mod_time->day > 31 ||␍␊ |
| 878 | mod_time->hour > 23 || mod_time->minute > 59 ||␍␊ |
| 879 | mod_time->second > 60)␍␊ |
| 880 | {␍␊ |
| 881 | png_warning(png_ptr, "Ignoring invalid time value");␍␊ |
| 882 | return;␍␊ |
| 883 | }␍␊ |
| 884 | ␍␊ |
| 885 | png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));␍␊ |
| 886 | info_ptr->valid |= PNG_INFO_tIME;␍␊ |
| 887 | }␍␊ |
| 888 | #endif␍␊ |
| 889 | ␍␊ |
| 890 | #ifdef PNG_tRNS_SUPPORTED␍␊ |
| 891 | void PNGAPI␍␊ |
| 892 | png_set_tRNS(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 893 | png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)␍␊ |
| 894 | {␍␊ |
| 895 | png_debug1(1, "in %s storage function", "tRNS");␍␊ |
| 896 | ␍␊ |
| 897 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 898 | return;␍␊ |
| 899 | ␍␊ |
| 900 | if (trans_alpha != NULL)␍␊ |
| 901 | {␍␊ |
| 902 | /* It may not actually be necessary to set png_ptr->trans_alpha here;␍␊ |
| 903 | * we do it for backward compatibility with the way the png_handle_tRNS␍␊ |
| 904 | * function used to do the allocation.␍␊ |
| 905 | */␍␊ |
| 906 | ␍␊ |
| 907 | png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);␍␊ |
| 908 | ␍␊ |
| 909 | /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */␍␊ |
| 910 | png_ptr->trans_alpha = info_ptr->trans_alpha =␍␊ |
| 911 | (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH);␍␊ |
| 912 | ␍␊ |
| 913 | if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)␍␊ |
| 914 | png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);␍␊ |
| 915 | }␍␊ |
| 916 | ␍␊ |
| 917 | if (trans_color != NULL)␍␊ |
| 918 | {␍␊ |
| 919 | int sample_max = (1 << info_ptr->bit_depth);␍␊ |
| 920 | ␍␊ |
| 921 | if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&␍␊ |
| 922 | (int)trans_color->gray > sample_max) ||␍␊ |
| 923 | (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&␍␊ |
| 924 | ((int)trans_color->red > sample_max ||␍␊ |
| 925 | (int)trans_color->green > sample_max ||␍␊ |
| 926 | (int)trans_color->blue > sample_max)))␍␊ |
| 927 | png_warning(png_ptr,␍␊ |
| 928 | "tRNS chunk has out-of-range samples for bit_depth");␍␊ |
| 929 | ␍␊ |
| 930 | png_memcpy(&(info_ptr->trans_color), trans_color,␍␊ |
| 931 | png_sizeof(png_color_16));␍␊ |
| 932 | ␍␊ |
| 933 | if (num_trans == 0)␍␊ |
| 934 | num_trans = 1;␍␊ |
| 935 | }␍␊ |
| 936 | ␍␊ |
| 937 | info_ptr->num_trans = (png_uint_16)num_trans;␍␊ |
| 938 | ␍␊ |
| 939 | if (num_trans != 0)␍␊ |
| 940 | {␍␊ |
| 941 | info_ptr->valid |= PNG_INFO_tRNS;␍␊ |
| 942 | info_ptr->free_me |= PNG_FREE_TRNS;␍␊ |
| 943 | }␍␊ |
| 944 | }␍␊ |
| 945 | #endif␍␊ |
| 946 | ␍␊ |
| 947 | #ifdef PNG_sPLT_SUPPORTED␍␊ |
| 948 | void PNGAPI␍␊ |
| 949 | png_set_sPLT(png_structp png_ptr,␍␊ |
| 950 | png_infop info_ptr, png_const_sPLT_tp entries, int nentries)␍␊ |
| 951 | /*␍␊ |
| 952 | * entries - array of png_sPLT_t structures␍␊ |
| 953 | * to be added to the list of palettes␍␊ |
| 954 | * in the info structure.␍␊ |
| 955 | *␍␊ |
| 956 | * nentries - number of palette structures to be␍␊ |
| 957 | * added.␍␊ |
| 958 | */␍␊ |
| 959 | {␍␊ |
| 960 | png_sPLT_tp np;␍␊ |
| 961 | int i;␍␊ |
| 962 | ␍␊ |
| 963 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 964 | return;␍␊ |
| 965 | ␍␊ |
| 966 | np = (png_sPLT_tp)png_malloc_warn(png_ptr,␍␊ |
| 967 | (info_ptr->splt_palettes_num + nentries) *␍␊ |
| 968 | (png_size_t)png_sizeof(png_sPLT_t));␍␊ |
| 969 | ␍␊ |
| 970 | if (np == NULL)␍␊ |
| 971 | {␍␊ |
| 972 | png_warning(png_ptr, "No memory for sPLT palettes");␍␊ |
| 973 | return;␍␊ |
| 974 | }␍␊ |
| 975 | ␍␊ |
| 976 | png_memcpy(np, info_ptr->splt_palettes,␍␊ |
| 977 | info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));␍␊ |
| 978 | ␍␊ |
| 979 | png_free(png_ptr, info_ptr->splt_palettes);␍␊ |
| 980 | info_ptr->splt_palettes=NULL;␍␊ |
| 981 | ␍␊ |
| 982 | for (i = 0; i < nentries; i++)␍␊ |
| 983 | {␍␊ |
| 984 | png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;␍␊ |
| 985 | png_const_sPLT_tp from = entries + i;␍␊ |
| 986 | png_size_t length;␍␊ |
| 987 | ␍␊ |
| 988 | length = png_strlen(from->name) + 1;␍␊ |
| 989 | to->name = (png_charp)png_malloc_warn(png_ptr, length);␍␊ |
| 990 | ␍␊ |
| 991 | if (to->name == NULL)␍␊ |
| 992 | {␍␊ |
| 993 | png_warning(png_ptr,␍␊ |
| 994 | "Out of memory while processing sPLT chunk");␍␊ |
| 995 | continue;␍␊ |
| 996 | }␍␊ |
| 997 | ␍␊ |
| 998 | png_memcpy(to->name, from->name, length);␍␊ |
| 999 | to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,␍␊ |
| 1000 | from->nentries * png_sizeof(png_sPLT_entry));␍␊ |
| 1001 | ␍␊ |
| 1002 | if (to->entries == NULL)␍␊ |
| 1003 | {␍␊ |
| 1004 | png_warning(png_ptr,␍␊ |
| 1005 | "Out of memory while processing sPLT chunk");␍␊ |
| 1006 | png_free(png_ptr, to->name);␍␊ |
| 1007 | to->name = NULL;␍␊ |
| 1008 | continue;␍␊ |
| 1009 | }␍␊ |
| 1010 | ␍␊ |
| 1011 | png_memcpy(to->entries, from->entries,␍␊ |
| 1012 | from->nentries * png_sizeof(png_sPLT_entry));␍␊ |
| 1013 | ␍␊ |
| 1014 | to->nentries = from->nentries;␍␊ |
| 1015 | to->depth = from->depth;␍␊ |
| 1016 | }␍␊ |
| 1017 | ␍␊ |
| 1018 | info_ptr->splt_palettes = np;␍␊ |
| 1019 | info_ptr->splt_palettes_num += nentries;␍␊ |
| 1020 | info_ptr->valid |= PNG_INFO_sPLT;␍␊ |
| 1021 | info_ptr->free_me |= PNG_FREE_SPLT;␍␊ |
| 1022 | }␍␊ |
| 1023 | #endif /* PNG_sPLT_SUPPORTED */␍␊ |
| 1024 | ␍␊ |
| 1025 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED␍␊ |
| 1026 | void PNGAPI␍␊ |
| 1027 | png_set_unknown_chunks(png_structp png_ptr,␍␊ |
| 1028 | png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)␍␊ |
| 1029 | {␍␊ |
| 1030 | png_unknown_chunkp np;␍␊ |
| 1031 | int i;␍␊ |
| 1032 | ␍␊ |
| 1033 | if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)␍␊ |
| 1034 | return;␍␊ |
| 1035 | ␍␊ |
| 1036 | np = (png_unknown_chunkp)png_malloc_warn(png_ptr,␍␊ |
| 1037 | (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *␍␊ |
| 1038 | png_sizeof(png_unknown_chunk));␍␊ |
| 1039 | ␍␊ |
| 1040 | if (np == NULL)␍␊ |
| 1041 | {␍␊ |
| 1042 | png_warning(png_ptr,␍␊ |
| 1043 | "Out of memory while processing unknown chunk");␍␊ |
| 1044 | return;␍␊ |
| 1045 | }␍␊ |
| 1046 | ␍␊ |
| 1047 | png_memcpy(np, info_ptr->unknown_chunks,␍␊ |
| 1048 | (png_size_t)info_ptr->unknown_chunks_num *␍␊ |
| 1049 | png_sizeof(png_unknown_chunk));␍␊ |
| 1050 | ␍␊ |
| 1051 | png_free(png_ptr, info_ptr->unknown_chunks);␍␊ |
| 1052 | info_ptr->unknown_chunks = NULL;␍␊ |
| 1053 | ␍␊ |
| 1054 | for (i = 0; i < num_unknowns; i++)␍␊ |
| 1055 | {␍␊ |
| 1056 | png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;␍␊ |
| 1057 | png_const_unknown_chunkp from = unknowns + i;␍␊ |
| 1058 | ␍␊ |
| 1059 | png_memcpy(to->name, from->name, png_sizeof(from->name));␍␊ |
| 1060 | to->name[png_sizeof(to->name)-1] = '\0';␍␊ |
| 1061 | to->size = from->size;␍␊ |
| 1062 | ␍␊ |
| 1063 | /* Note our location in the read or write sequence */␍␊ |
| 1064 | to->location = (png_byte)(png_ptr->mode & 0xff);␍␊ |
| 1065 | ␍␊ |
| 1066 | if (from->size == 0)␍␊ |
| 1067 | to->data=NULL;␍␊ |
| 1068 | ␍␊ |
| 1069 | else␍␊ |
| 1070 | {␍␊ |
| 1071 | to->data = (png_bytep)png_malloc_warn(png_ptr,␍␊ |
| 1072 | (png_size_t)from->size);␍␊ |
| 1073 | ␍␊ |
| 1074 | if (to->data == NULL)␍␊ |
| 1075 | {␍␊ |
| 1076 | png_warning(png_ptr,␍␊ |
| 1077 | "Out of memory while processing unknown chunk");␍␊ |
| 1078 | to->size = 0;␍␊ |
| 1079 | }␍␊ |
| 1080 | ␍␊ |
| 1081 | else␍␊ |
| 1082 | png_memcpy(to->data, from->data, from->size);␍␊ |
| 1083 | }␍␊ |
| 1084 | }␍␊ |
| 1085 | ␍␊ |
| 1086 | info_ptr->unknown_chunks = np;␍␊ |
| 1087 | info_ptr->unknown_chunks_num += num_unknowns;␍␊ |
| 1088 | info_ptr->free_me |= PNG_FREE_UNKN;␍␊ |
| 1089 | }␍␊ |
| 1090 | ␍␊ |
| 1091 | void PNGAPI␍␊ |
| 1092 | png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,␍␊ |
| 1093 | int chunk, int location)␍␊ |
| 1094 | {␍␊ |
| 1095 | if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <␍␊ |
| 1096 | info_ptr->unknown_chunks_num)␍␊ |
| 1097 | info_ptr->unknown_chunks[chunk].location = (png_byte)location;␍␊ |
| 1098 | }␍␊ |
| 1099 | #endif␍␊ |
| 1100 | ␍␊ |
| 1101 | ␍␊ |
| 1102 | #ifdef PNG_MNG_FEATURES_SUPPORTED␍␊ |
| 1103 | png_uint_32 PNGAPI␍␊ |
| 1104 | png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)␍␊ |
| 1105 | {␍␊ |
| 1106 | png_debug(1, "in png_permit_mng_features");␍␊ |
| 1107 | ␍␊ |
| 1108 | if (png_ptr == NULL)␍␊ |
| 1109 | return (png_uint_32)0;␍␊ |
| 1110 | ␍␊ |
| 1111 | png_ptr->mng_features_permitted =␍␊ |
| 1112 | (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);␍␊ |
| 1113 | ␍␊ |
| 1114 | return (png_uint_32)png_ptr->mng_features_permitted;␍␊ |
| 1115 | }␍␊ |
| 1116 | #endif␍␊ |
| 1117 | ␍␊ |
| 1118 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED␍␊ |
| 1119 | void PNGAPI␍␊ |
| 1120 | png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep␍␊ |
| 1121 | chunk_list, int num_chunks)␍␊ |
| 1122 | {␍␊ |
| 1123 | png_bytep new_list, p;␍␊ |
| 1124 | int i, old_num_chunks;␍␊ |
| 1125 | if (png_ptr == NULL)␍␊ |
| 1126 | return;␍␊ |
| 1127 | ␍␊ |
| 1128 | if (num_chunks == 0)␍␊ |
| 1129 | {␍␊ |
| 1130 | if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)␍␊ |
| 1131 | png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;␍␊ |
| 1132 | ␍␊ |
| 1133 | else␍␊ |
| 1134 | png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;␍␊ |
| 1135 | ␍␊ |
| 1136 | if (keep == PNG_HANDLE_CHUNK_ALWAYS)␍␊ |
| 1137 | png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;␍␊ |
| 1138 | ␍␊ |
| 1139 | else␍␊ |
| 1140 | png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;␍␊ |
| 1141 | ␍␊ |
| 1142 | return;␍␊ |
| 1143 | }␍␊ |
| 1144 | ␍␊ |
| 1145 | if (chunk_list == NULL)␍␊ |
| 1146 | return;␍␊ |
| 1147 | ␍␊ |
| 1148 | old_num_chunks = png_ptr->num_chunk_list;␍␊ |
| 1149 | new_list=(png_bytep)png_malloc(png_ptr,␍␊ |
| 1150 | (png_size_t)(5*(num_chunks + old_num_chunks)));␍␊ |
| 1151 | ␍␊ |
| 1152 | if (png_ptr->chunk_list != NULL)␍␊ |
| 1153 | {␍␊ |
| 1154 | png_memcpy(new_list, png_ptr->chunk_list,␍␊ |
| 1155 | (png_size_t)(5*old_num_chunks));␍␊ |
| 1156 | png_free(png_ptr, png_ptr->chunk_list);␍␊ |
| 1157 | png_ptr->chunk_list=NULL;␍␊ |
| 1158 | }␍␊ |
| 1159 | ␍␊ |
| 1160 | png_memcpy(new_list + 5*old_num_chunks, chunk_list,␍␊ |
| 1161 | (png_size_t)(5*num_chunks));␍␊ |
| 1162 | ␍␊ |
| 1163 | for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)␍␊ |
| 1164 | *p=(png_byte)keep;␍␊ |
| 1165 | ␍␊ |
| 1166 | png_ptr->num_chunk_list = old_num_chunks + num_chunks;␍␊ |
| 1167 | png_ptr->chunk_list = new_list;␍␊ |
| 1168 | png_ptr->free_me |= PNG_FREE_LIST;␍␊ |
| 1169 | }␍␊ |
| 1170 | #endif␍␊ |
| 1171 | ␍␊ |
| 1172 | #ifdef PNG_READ_USER_CHUNKS_SUPPORTED␍␊ |
| 1173 | void PNGAPI␍␊ |
| 1174 | png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,␍␊ |
| 1175 | png_user_chunk_ptr read_user_chunk_fn)␍␊ |
| 1176 | {␍␊ |
| 1177 | png_debug(1, "in png_set_read_user_chunk_fn");␍␊ |
| 1178 | ␍␊ |
| 1179 | if (png_ptr == NULL)␍␊ |
| 1180 | return;␍␊ |
| 1181 | ␍␊ |
| 1182 | png_ptr->read_user_chunk_fn = read_user_chunk_fn;␍␊ |
| 1183 | png_ptr->user_chunk_ptr = user_chunk_ptr;␍␊ |
| 1184 | }␍␊ |
| 1185 | #endif␍␊ |
| 1186 | ␍␊ |
| 1187 | #ifdef PNG_INFO_IMAGE_SUPPORTED␍␊ |
| 1188 | void PNGAPI␍␊ |
| 1189 | png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)␍␊ |
| 1190 | {␍␊ |
| 1191 | png_debug1(1, "in %s storage function", "rows");␍␊ |
| 1192 | ␍␊ |
| 1193 | if (png_ptr == NULL || info_ptr == NULL)␍␊ |
| 1194 | return;␍␊ |
| 1195 | ␍␊ |
| 1196 | if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))␍␊ |
| 1197 | png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);␍␊ |
| 1198 | ␍␊ |
| 1199 | info_ptr->row_pointers = row_pointers;␍␊ |
| 1200 | ␍␊ |
| 1201 | if (row_pointers)␍␊ |
| 1202 | info_ptr->valid |= PNG_INFO_IDAT;␍␊ |
| 1203 | }␍␊ |
| 1204 | #endif␍␊ |
| 1205 | ␍␊ |
| 1206 | void PNGAPI␍␊ |
| 1207 | png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)␍␊ |
| 1208 | {␍␊ |
| 1209 | if (png_ptr == NULL)␍␊ |
| 1210 | return;␍␊ |
| 1211 | ␍␊ |
| 1212 | png_free(png_ptr, png_ptr->zbuf);␍␊ |
| 1213 | ␍␊ |
| 1214 | if (size > ZLIB_IO_MAX)␍␊ |
| 1215 | {␍␊ |
| 1216 | png_warning(png_ptr, "Attempt to set buffer size beyond max ignored");␍␊ |
| 1217 | png_ptr->zbuf_size = ZLIB_IO_MAX;␍␊ |
| 1218 | size = ZLIB_IO_MAX; /* must fit */␍␊ |
| 1219 | }␍␊ |
| 1220 | ␍␊ |
| 1221 | else␍␊ |
| 1222 | png_ptr->zbuf_size = (uInt)size;␍␊ |
| 1223 | ␍␊ |
| 1224 | png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);␍␊ |
| 1225 | ␍␊ |
| 1226 | /* The following ensures a relatively safe failure if this gets called while␍␊ |
| 1227 | * the buffer is actually in use.␍␊ |
| 1228 | */␍␊ |
| 1229 | png_ptr->zstream.next_out = png_ptr->zbuf;␍␊ |
| 1230 | png_ptr->zstream.avail_out = 0;␍␊ |
| 1231 | png_ptr->zstream.avail_in = 0;␍␊ |
| 1232 | }␍␊ |
| 1233 | ␍␊ |
| 1234 | void PNGAPI␍␊ |
| 1235 | png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)␍␊ |
| 1236 | {␍␊ |
| 1237 | if (png_ptr && info_ptr)␍␊ |
| 1238 | info_ptr->valid &= ~mask;␍␊ |
| 1239 | }␍␊ |
| 1240 | ␍␊ |
| 1241 | ␍␊ |
| 1242 | ␍␊ |
| 1243 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED␍␊ |
| 1244 | /* This function was added to libpng 1.2.6 */␍␊ |
| 1245 | void PNGAPI␍␊ |
| 1246 | png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,␍␊ |
| 1247 | png_uint_32 user_height_max)␍␊ |
| 1248 | {␍␊ |
| 1249 | /* Images with dimensions larger than these limits will be␍␊ |
| 1250 | * rejected by png_set_IHDR(). To accept any PNG datastream␍␊ |
| 1251 | * regardless of dimensions, set both limits to 0x7ffffffL.␍␊ |
| 1252 | */␍␊ |
| 1253 | if (png_ptr == NULL)␍␊ |
| 1254 | return;␍␊ |
| 1255 | ␍␊ |
| 1256 | png_ptr->user_width_max = user_width_max;␍␊ |
| 1257 | png_ptr->user_height_max = user_height_max;␍␊ |
| 1258 | }␍␊ |
| 1259 | ␍␊ |
| 1260 | /* This function was added to libpng 1.4.0 */␍␊ |
| 1261 | void PNGAPI␍␊ |
| 1262 | png_set_chunk_cache_max (png_structp png_ptr,␍␊ |
| 1263 | png_uint_32 user_chunk_cache_max)␍␊ |
| 1264 | {␍␊ |
| 1265 | if (png_ptr)␍␊ |
| 1266 | png_ptr->user_chunk_cache_max = user_chunk_cache_max;␍␊ |
| 1267 | }␍␊ |
| 1268 | ␍␊ |
| 1269 | /* This function was added to libpng 1.4.1 */␍␊ |
| 1270 | void PNGAPI␍␊ |
| 1271 | png_set_chunk_malloc_max (png_structp png_ptr,␍␊ |
| 1272 | png_alloc_size_t user_chunk_malloc_max)␍␊ |
| 1273 | {␍␊ |
| 1274 | if (png_ptr)␍␊ |
| 1275 | png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;␍␊ |
| 1276 | }␍␊ |
| 1277 | #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */␍␊ |
| 1278 | ␍␊ |
| 1279 | ␍␊ |
| 1280 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED␍␊ |
| 1281 | void PNGAPI␍␊ |
| 1282 | png_set_benign_errors(png_structp png_ptr, int allowed)␍␊ |
| 1283 | {␍␊ |
| 1284 | png_debug(1, "in png_set_benign_errors");␍␊ |
| 1285 | ␍␊ |
| 1286 | if (allowed)␍␊ |
| 1287 | png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;␍␊ |
| 1288 | ␍␊ |
| 1289 | else␍␊ |
| 1290 | png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;␍␊ |
| 1291 | }␍␊ |
| 1292 | #endif /* PNG_BENIGN_ERRORS_SUPPORTED */␍␊ |
| 1293 | ␍␊ |
| 1294 | #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED␍␊ |
| 1295 | /* Whether to report invalid palette index; added at libng-1.5.10␍␊ |
| 1296 | * allowed - one of 0: disable; 1: enable␍␊ |
| 1297 | */␍␊ |
| 1298 | void PNGAPI␍␊ |
| 1299 | png_set_check_for_invalid_index(png_structp png_ptr, int allowed)␍␊ |
| 1300 | {␍␊ |
| 1301 | png_debug(1, "in png_set_check_for_invalid_index");␍␊ |
| 1302 | ␍␊ |
| 1303 | if (allowed)␍␊ |
| 1304 | png_ptr->num_palette_max = 0;␍␊ |
| 1305 | ␍␊ |
| 1306 | else␍␊ |
| 1307 | png_ptr->num_palette_max = -1;␍␊ |
| 1308 | }␍␊ |
| 1309 | #endif␍␊ |
| 1310 | ␍␊ |
| 1311 | #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */␍␊ |
| 1312 | |
