istereo2
diff libs/libpng/pngset.c @ 2:81d35769f546
added the tunnel effect source
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sat, 19 Sep 2015 05:51:51 +0300 |
| parents | |
| children |
line diff
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/libs/libpng/pngset.c Sat Sep 19 05:51:51 2015 +0300 1.3 @@ -0,0 +1,1293 @@ 1.4 + 1.5 +/* pngset.c - storage of image information into info struct 1.6 + * 1.7 + * Last changed in libpng 1.2.30 [August 15, 2008] 1.8 + * For conditions of distribution and use, see copyright notice in png.h 1.9 + * Copyright (c) 1998-2008 Glenn Randers-Pehrson 1.10 + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) 1.11 + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) 1.12 + * 1.13 + * The functions here are used during reads to store data from the file 1.14 + * into the info struct, and during writes to store application data 1.15 + * into the info struct for writing into the file. This abstracts the 1.16 + * info struct and allows us to change the structure in the future. 1.17 + */ 1.18 + 1.19 +#define PNG_INTERNAL 1.20 +#include "png.h" 1.21 +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 1.22 + 1.23 +#if defined(PNG_bKGD_SUPPORTED) 1.24 +void PNGAPI 1.25 +png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) 1.26 +{ 1.27 + png_debug1(1, "in %s storage function\n", "bKGD"); 1.28 + if (png_ptr == NULL || info_ptr == NULL) 1.29 + return; 1.30 + 1.31 + png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16)); 1.32 + info_ptr->valid |= PNG_INFO_bKGD; 1.33 +} 1.34 +#endif 1.35 + 1.36 +#if defined(PNG_cHRM_SUPPORTED) 1.37 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.38 +void PNGAPI 1.39 +png_set_cHRM(png_structp png_ptr, png_infop info_ptr, 1.40 + double white_x, double white_y, double red_x, double red_y, 1.41 + double green_x, double green_y, double blue_x, double blue_y) 1.42 +{ 1.43 + png_debug1(1, "in %s storage function\n", "cHRM"); 1.44 + if (png_ptr == NULL || info_ptr == NULL) 1.45 + return; 1.46 + if (!(white_x || white_y || red_x || red_y || green_x || green_y || 1.47 + blue_x || blue_y)) 1.48 + { 1.49 + png_warning(png_ptr, 1.50 + "Ignoring attempt to set all-zero chromaticity values"); 1.51 + return; 1.52 + } 1.53 + if (white_x < 0.0 || white_y < 0.0 || 1.54 + red_x < 0.0 || red_y < 0.0 || 1.55 + green_x < 0.0 || green_y < 0.0 || 1.56 + blue_x < 0.0 || blue_y < 0.0) 1.57 + { 1.58 + png_warning(png_ptr, 1.59 + "Ignoring attempt to set negative chromaticity value"); 1.60 + return; 1.61 + } 1.62 + if (white_x > 21474.83 || white_y > 21474.83 || 1.63 + red_x > 21474.83 || red_y > 21474.83 || 1.64 + green_x > 21474.83 || green_y > 21474.83 || 1.65 + blue_x > 21474.83 || blue_y > 21474.83) 1.66 + { 1.67 + png_warning(png_ptr, 1.68 + "Ignoring attempt to set chromaticity value exceeding 21474.83"); 1.69 + return; 1.70 + } 1.71 + 1.72 + info_ptr->x_white = (float)white_x; 1.73 + info_ptr->y_white = (float)white_y; 1.74 + info_ptr->x_red = (float)red_x; 1.75 + info_ptr->y_red = (float)red_y; 1.76 + info_ptr->x_green = (float)green_x; 1.77 + info_ptr->y_green = (float)green_y; 1.78 + info_ptr->x_blue = (float)blue_x; 1.79 + info_ptr->y_blue = (float)blue_y; 1.80 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.81 + info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5); 1.82 + info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5); 1.83 + info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5); 1.84 + info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5); 1.85 + info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5); 1.86 + info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5); 1.87 + info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5); 1.88 + info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5); 1.89 +#endif 1.90 + info_ptr->valid |= PNG_INFO_cHRM; 1.91 +} 1.92 +#endif 1.93 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.94 +void PNGAPI 1.95 +png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, 1.96 + png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, 1.97 + png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, 1.98 + png_fixed_point blue_x, png_fixed_point blue_y) 1.99 +{ 1.100 + png_debug1(1, "in %s storage function\n", "cHRM"); 1.101 + if (png_ptr == NULL || info_ptr == NULL) 1.102 + return; 1.103 + 1.104 + if (!(white_x || white_y || red_x || red_y || green_x || green_y || 1.105 + blue_x || blue_y)) 1.106 + { 1.107 + png_warning(png_ptr, 1.108 + "Ignoring attempt to set all-zero chromaticity values"); 1.109 + return; 1.110 + } 1.111 + if (white_x < 0 || white_y < 0 || 1.112 + red_x < 0 || red_y < 0 || 1.113 + green_x < 0 || green_y < 0 || 1.114 + blue_x < 0 || blue_y < 0) 1.115 + { 1.116 + png_warning(png_ptr, 1.117 + "Ignoring attempt to set negative chromaticity value"); 1.118 + return; 1.119 + } 1.120 + if (white_x > (png_fixed_point) PNG_UINT_31_MAX || 1.121 + white_y > (png_fixed_point) PNG_UINT_31_MAX || 1.122 + red_x > (png_fixed_point) PNG_UINT_31_MAX || 1.123 + red_y > (png_fixed_point) PNG_UINT_31_MAX || 1.124 + green_x > (png_fixed_point) PNG_UINT_31_MAX || 1.125 + green_y > (png_fixed_point) PNG_UINT_31_MAX || 1.126 + blue_x > (png_fixed_point) PNG_UINT_31_MAX || 1.127 + blue_y > (png_fixed_point) PNG_UINT_31_MAX ) 1.128 + { 1.129 + png_warning(png_ptr, 1.130 + "Ignoring attempt to set chromaticity value exceeding 21474.83"); 1.131 + return; 1.132 + } 1.133 + info_ptr->int_x_white = white_x; 1.134 + info_ptr->int_y_white = white_y; 1.135 + info_ptr->int_x_red = red_x; 1.136 + info_ptr->int_y_red = red_y; 1.137 + info_ptr->int_x_green = green_x; 1.138 + info_ptr->int_y_green = green_y; 1.139 + info_ptr->int_x_blue = blue_x; 1.140 + info_ptr->int_y_blue = blue_y; 1.141 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.142 + info_ptr->x_white = (float)(white_x/100000.); 1.143 + info_ptr->y_white = (float)(white_y/100000.); 1.144 + info_ptr->x_red = (float)( red_x/100000.); 1.145 + info_ptr->y_red = (float)( red_y/100000.); 1.146 + info_ptr->x_green = (float)(green_x/100000.); 1.147 + info_ptr->y_green = (float)(green_y/100000.); 1.148 + info_ptr->x_blue = (float)( blue_x/100000.); 1.149 + info_ptr->y_blue = (float)( blue_y/100000.); 1.150 +#endif 1.151 + info_ptr->valid |= PNG_INFO_cHRM; 1.152 +} 1.153 +#endif 1.154 +#endif 1.155 + 1.156 +#if defined(PNG_gAMA_SUPPORTED) 1.157 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.158 +void PNGAPI 1.159 +png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) 1.160 +{ 1.161 + double gamma; 1.162 + png_debug1(1, "in %s storage function\n", "gAMA"); 1.163 + if (png_ptr == NULL || info_ptr == NULL) 1.164 + return; 1.165 + 1.166 + /* Check for overflow */ 1.167 + if (file_gamma > 21474.83) 1.168 + { 1.169 + png_warning(png_ptr, "Limiting gamma to 21474.83"); 1.170 + gamma=21474.83; 1.171 + } 1.172 + else 1.173 + gamma = file_gamma; 1.174 + info_ptr->gamma = (float)gamma; 1.175 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.176 + info_ptr->int_gamma = (int)(gamma*100000.+.5); 1.177 +#endif 1.178 + info_ptr->valid |= PNG_INFO_gAMA; 1.179 + if (gamma == 0.0) 1.180 + png_warning(png_ptr, "Setting gamma=0"); 1.181 +} 1.182 +#endif 1.183 +void PNGAPI 1.184 +png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point 1.185 + int_gamma) 1.186 +{ 1.187 + png_fixed_point gamma; 1.188 + 1.189 + png_debug1(1, "in %s storage function\n", "gAMA"); 1.190 + if (png_ptr == NULL || info_ptr == NULL) 1.191 + return; 1.192 + 1.193 + if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX) 1.194 + { 1.195 + png_warning(png_ptr, "Limiting gamma to 21474.83"); 1.196 + gamma=PNG_UINT_31_MAX; 1.197 + } 1.198 + else 1.199 + { 1.200 + if (int_gamma < 0) 1.201 + { 1.202 + png_warning(png_ptr, "Setting negative gamma to zero"); 1.203 + gamma = 0; 1.204 + } 1.205 + else 1.206 + gamma = int_gamma; 1.207 + } 1.208 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.209 + info_ptr->gamma = (float)(gamma/100000.); 1.210 +#endif 1.211 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.212 + info_ptr->int_gamma = gamma; 1.213 +#endif 1.214 + info_ptr->valid |= PNG_INFO_gAMA; 1.215 + if (gamma == 0) 1.216 + png_warning(png_ptr, "Setting gamma=0"); 1.217 +} 1.218 +#endif 1.219 + 1.220 +#if defined(PNG_hIST_SUPPORTED) 1.221 +void PNGAPI 1.222 +png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) 1.223 +{ 1.224 + int i; 1.225 + 1.226 + png_debug1(1, "in %s storage function\n", "hIST"); 1.227 + if (png_ptr == NULL || info_ptr == NULL) 1.228 + return; 1.229 + if (info_ptr->num_palette == 0 || info_ptr->num_palette 1.230 + > PNG_MAX_PALETTE_LENGTH) 1.231 + { 1.232 + png_warning(png_ptr, 1.233 + "Invalid palette size, hIST allocation skipped."); 1.234 + return; 1.235 + } 1.236 + 1.237 +#ifdef PNG_FREE_ME_SUPPORTED 1.238 + png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); 1.239 +#endif 1.240 + /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version 1.241 + 1.2.1 */ 1.242 + png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, 1.243 + (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16))); 1.244 + if (png_ptr->hist == NULL) 1.245 + { 1.246 + png_warning(png_ptr, "Insufficient memory for hIST chunk data."); 1.247 + return; 1.248 + } 1.249 + 1.250 + for (i = 0; i < info_ptr->num_palette; i++) 1.251 + png_ptr->hist[i] = hist[i]; 1.252 + info_ptr->hist = png_ptr->hist; 1.253 + info_ptr->valid |= PNG_INFO_hIST; 1.254 + 1.255 +#ifdef PNG_FREE_ME_SUPPORTED 1.256 + info_ptr->free_me |= PNG_FREE_HIST; 1.257 +#else 1.258 + png_ptr->flags |= PNG_FLAG_FREE_HIST; 1.259 +#endif 1.260 +} 1.261 +#endif 1.262 + 1.263 +void PNGAPI 1.264 +png_set_IHDR(png_structp png_ptr, png_infop info_ptr, 1.265 + png_uint_32 width, png_uint_32 height, int bit_depth, 1.266 + int color_type, int interlace_type, int compression_type, 1.267 + int filter_type) 1.268 +{ 1.269 + png_debug1(1, "in %s storage function\n", "IHDR"); 1.270 + if (png_ptr == NULL || info_ptr == NULL) 1.271 + return; 1.272 + 1.273 + /* check for width and height valid values */ 1.274 + if (width == 0 || height == 0) 1.275 + png_error(png_ptr, "Image width or height is zero in IHDR"); 1.276 +#ifdef PNG_SET_USER_LIMITS_SUPPORTED 1.277 + if (width > png_ptr->user_width_max || height > png_ptr->user_height_max) 1.278 + png_error(png_ptr, "image size exceeds user limits in IHDR"); 1.279 +#else 1.280 + if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX) 1.281 + png_error(png_ptr, "image size exceeds user limits in IHDR"); 1.282 +#endif 1.283 + if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX) 1.284 + png_error(png_ptr, "Invalid image size in IHDR"); 1.285 + if ( width > (PNG_UINT_32_MAX 1.286 + >> 3) /* 8-byte RGBA pixels */ 1.287 + - 64 /* bigrowbuf hack */ 1.288 + - 1 /* filter byte */ 1.289 + - 7*8 /* rounding of width to multiple of 8 pixels */ 1.290 + - 8) /* extra max_pixel_depth pad */ 1.291 + png_warning(png_ptr, "Width is too large for libpng to process pixels"); 1.292 + 1.293 + /* check other values */ 1.294 + if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && 1.295 + bit_depth != 8 && bit_depth != 16) 1.296 + png_error(png_ptr, "Invalid bit depth in IHDR"); 1.297 + 1.298 + if (color_type < 0 || color_type == 1 || 1.299 + color_type == 5 || color_type > 6) 1.300 + png_error(png_ptr, "Invalid color type in IHDR"); 1.301 + 1.302 + if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || 1.303 + ((color_type == PNG_COLOR_TYPE_RGB || 1.304 + color_type == PNG_COLOR_TYPE_GRAY_ALPHA || 1.305 + color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) 1.306 + png_error(png_ptr, "Invalid color type/bit depth combination in IHDR"); 1.307 + 1.308 + if (interlace_type >= PNG_INTERLACE_LAST) 1.309 + png_error(png_ptr, "Unknown interlace method in IHDR"); 1.310 + 1.311 + if (compression_type != PNG_COMPRESSION_TYPE_BASE) 1.312 + png_error(png_ptr, "Unknown compression method in IHDR"); 1.313 + 1.314 +#if defined(PNG_MNG_FEATURES_SUPPORTED) 1.315 + /* Accept filter_method 64 (intrapixel differencing) only if 1.316 + * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and 1.317 + * 2. Libpng did not read a PNG signature (this filter_method is only 1.318 + * used in PNG datastreams that are embedded in MNG datastreams) and 1.319 + * 3. The application called png_permit_mng_features with a mask that 1.320 + * included PNG_FLAG_MNG_FILTER_64 and 1.321 + * 4. The filter_method is 64 and 1.322 + * 5. The color_type is RGB or RGBA 1.323 + */ 1.324 + if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted) 1.325 + png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); 1.326 + if (filter_type != PNG_FILTER_TYPE_BASE) 1.327 + { 1.328 + if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && 1.329 + (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && 1.330 + ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && 1.331 + (color_type == PNG_COLOR_TYPE_RGB || 1.332 + color_type == PNG_COLOR_TYPE_RGB_ALPHA))) 1.333 + png_error(png_ptr, "Unknown filter method in IHDR"); 1.334 + if (png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) 1.335 + png_warning(png_ptr, "Invalid filter method in IHDR"); 1.336 + } 1.337 +#else 1.338 + if (filter_type != PNG_FILTER_TYPE_BASE) 1.339 + png_error(png_ptr, "Unknown filter method in IHDR"); 1.340 +#endif 1.341 + 1.342 + info_ptr->width = width; 1.343 + info_ptr->height = height; 1.344 + info_ptr->bit_depth = (png_byte)bit_depth; 1.345 + info_ptr->color_type =(png_byte) color_type; 1.346 + info_ptr->compression_type = (png_byte)compression_type; 1.347 + info_ptr->filter_type = (png_byte)filter_type; 1.348 + info_ptr->interlace_type = (png_byte)interlace_type; 1.349 + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) 1.350 + info_ptr->channels = 1; 1.351 + else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) 1.352 + info_ptr->channels = 3; 1.353 + else 1.354 + info_ptr->channels = 1; 1.355 + if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) 1.356 + info_ptr->channels++; 1.357 + info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); 1.358 + 1.359 + /* check for potential overflow */ 1.360 + if (width > (PNG_UINT_32_MAX 1.361 + >> 3) /* 8-byte RGBA pixels */ 1.362 + - 64 /* bigrowbuf hack */ 1.363 + - 1 /* filter byte */ 1.364 + - 7*8 /* rounding of width to multiple of 8 pixels */ 1.365 + - 8) /* extra max_pixel_depth pad */ 1.366 + info_ptr->rowbytes = (png_size_t)0; 1.367 + else 1.368 + info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); 1.369 +} 1.370 + 1.371 +#if defined(PNG_oFFs_SUPPORTED) 1.372 +void PNGAPI 1.373 +png_set_oFFs(png_structp png_ptr, png_infop info_ptr, 1.374 + png_int_32 offset_x, png_int_32 offset_y, int unit_type) 1.375 +{ 1.376 + png_debug1(1, "in %s storage function\n", "oFFs"); 1.377 + if (png_ptr == NULL || info_ptr == NULL) 1.378 + return; 1.379 + 1.380 + info_ptr->x_offset = offset_x; 1.381 + info_ptr->y_offset = offset_y; 1.382 + info_ptr->offset_unit_type = (png_byte)unit_type; 1.383 + info_ptr->valid |= PNG_INFO_oFFs; 1.384 +} 1.385 +#endif 1.386 + 1.387 +#if defined(PNG_pCAL_SUPPORTED) 1.388 +void PNGAPI 1.389 +png_set_pCAL(png_structp png_ptr, png_infop info_ptr, 1.390 + png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, 1.391 + png_charp units, png_charpp params) 1.392 +{ 1.393 + png_uint_32 length; 1.394 + int i; 1.395 + 1.396 + png_debug1(1, "in %s storage function\n", "pCAL"); 1.397 + if (png_ptr == NULL || info_ptr == NULL) 1.398 + return; 1.399 + 1.400 + length = png_strlen(purpose) + 1; 1.401 + png_debug1(3, "allocating purpose for info (%lu bytes)\n", 1.402 + (unsigned long)length); 1.403 + info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); 1.404 + if (info_ptr->pcal_purpose == NULL) 1.405 + { 1.406 + png_warning(png_ptr, "Insufficient memory for pCAL purpose."); 1.407 + return; 1.408 + } 1.409 + png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); 1.410 + 1.411 + png_debug(3, "storing X0, X1, type, and nparams in info\n"); 1.412 + info_ptr->pcal_X0 = X0; 1.413 + info_ptr->pcal_X1 = X1; 1.414 + info_ptr->pcal_type = (png_byte)type; 1.415 + info_ptr->pcal_nparams = (png_byte)nparams; 1.416 + 1.417 + length = png_strlen(units) + 1; 1.418 + png_debug1(3, "allocating units for info (%lu bytes)\n", 1.419 + (unsigned long)length); 1.420 + info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); 1.421 + if (info_ptr->pcal_units == NULL) 1.422 + { 1.423 + png_warning(png_ptr, "Insufficient memory for pCAL units."); 1.424 + return; 1.425 + } 1.426 + png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); 1.427 + 1.428 + info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, 1.429 + (png_uint_32)((nparams + 1) * png_sizeof(png_charp))); 1.430 + if (info_ptr->pcal_params == NULL) 1.431 + { 1.432 + png_warning(png_ptr, "Insufficient memory for pCAL params."); 1.433 + return; 1.434 + } 1.435 + 1.436 + info_ptr->pcal_params[nparams] = NULL; 1.437 + 1.438 + for (i = 0; i < nparams; i++) 1.439 + { 1.440 + length = png_strlen(params[i]) + 1; 1.441 + png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, 1.442 + (unsigned long)length); 1.443 + info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); 1.444 + if (info_ptr->pcal_params[i] == NULL) 1.445 + { 1.446 + png_warning(png_ptr, "Insufficient memory for pCAL parameter."); 1.447 + return; 1.448 + } 1.449 + png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); 1.450 + } 1.451 + 1.452 + info_ptr->valid |= PNG_INFO_pCAL; 1.453 +#ifdef PNG_FREE_ME_SUPPORTED 1.454 + info_ptr->free_me |= PNG_FREE_PCAL; 1.455 +#endif 1.456 +} 1.457 +#endif 1.458 + 1.459 +#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) 1.460 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.461 +void PNGAPI 1.462 +png_set_sCAL(png_structp png_ptr, png_infop info_ptr, 1.463 + int unit, double width, double height) 1.464 +{ 1.465 + png_debug1(1, "in %s storage function\n", "sCAL"); 1.466 + if (png_ptr == NULL || info_ptr == NULL) 1.467 + return; 1.468 + 1.469 + info_ptr->scal_unit = (png_byte)unit; 1.470 + info_ptr->scal_pixel_width = width; 1.471 + info_ptr->scal_pixel_height = height; 1.472 + 1.473 + info_ptr->valid |= PNG_INFO_sCAL; 1.474 +} 1.475 +#else 1.476 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.477 +void PNGAPI 1.478 +png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, 1.479 + int unit, png_charp swidth, png_charp sheight) 1.480 +{ 1.481 + png_uint_32 length; 1.482 + 1.483 + png_debug1(1, "in %s storage function\n", "sCAL"); 1.484 + if (png_ptr == NULL || info_ptr == NULL) 1.485 + return; 1.486 + 1.487 + info_ptr->scal_unit = (png_byte)unit; 1.488 + 1.489 + length = png_strlen(swidth) + 1; 1.490 + png_debug1(3, "allocating unit for info (%u bytes)\n", 1.491 + (unsigned int)length); 1.492 + info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length); 1.493 + if (info_ptr->scal_s_width == NULL) 1.494 + { 1.495 + png_warning(png_ptr, 1.496 + "Memory allocation failed while processing sCAL."); 1.497 + return; 1.498 + } 1.499 + png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length); 1.500 + 1.501 + length = png_strlen(sheight) + 1; 1.502 + png_debug1(3, "allocating unit for info (%u bytes)\n", 1.503 + (unsigned int)length); 1.504 + info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length); 1.505 + if (info_ptr->scal_s_height == NULL) 1.506 + { 1.507 + png_free (png_ptr, info_ptr->scal_s_width); 1.508 + info_ptr->scal_s_width = NULL; 1.509 + png_warning(png_ptr, 1.510 + "Memory allocation failed while processing sCAL."); 1.511 + return; 1.512 + } 1.513 + png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length); 1.514 + info_ptr->valid |= PNG_INFO_sCAL; 1.515 +#ifdef PNG_FREE_ME_SUPPORTED 1.516 + info_ptr->free_me |= PNG_FREE_SCAL; 1.517 +#endif 1.518 +} 1.519 +#endif 1.520 +#endif 1.521 +#endif 1.522 + 1.523 +#if defined(PNG_pHYs_SUPPORTED) 1.524 +void PNGAPI 1.525 +png_set_pHYs(png_structp png_ptr, png_infop info_ptr, 1.526 + png_uint_32 res_x, png_uint_32 res_y, int unit_type) 1.527 +{ 1.528 + png_debug1(1, "in %s storage function\n", "pHYs"); 1.529 + if (png_ptr == NULL || info_ptr == NULL) 1.530 + return; 1.531 + 1.532 + info_ptr->x_pixels_per_unit = res_x; 1.533 + info_ptr->y_pixels_per_unit = res_y; 1.534 + info_ptr->phys_unit_type = (png_byte)unit_type; 1.535 + info_ptr->valid |= PNG_INFO_pHYs; 1.536 +} 1.537 +#endif 1.538 + 1.539 +void PNGAPI 1.540 +png_set_PLTE(png_structp png_ptr, png_infop info_ptr, 1.541 + png_colorp palette, int num_palette) 1.542 +{ 1.543 + 1.544 + png_debug1(1, "in %s storage function\n", "PLTE"); 1.545 + if (png_ptr == NULL || info_ptr == NULL) 1.546 + return; 1.547 + 1.548 + if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) 1.549 + { 1.550 + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) 1.551 + png_error(png_ptr, "Invalid palette length"); 1.552 + else 1.553 + { 1.554 + png_warning(png_ptr, "Invalid palette length"); 1.555 + return; 1.556 + } 1.557 + } 1.558 + 1.559 + /* 1.560 + * It may not actually be necessary to set png_ptr->palette here; 1.561 + * we do it for backward compatibility with the way the png_handle_tRNS 1.562 + * function used to do the allocation. 1.563 + */ 1.564 +#ifdef PNG_FREE_ME_SUPPORTED 1.565 + png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); 1.566 +#endif 1.567 + 1.568 + /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead 1.569 + of num_palette entries, 1.570 + in case of an invalid PNG file that has too-large sample values. */ 1.571 + png_ptr->palette = (png_colorp)png_malloc(png_ptr, 1.572 + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); 1.573 + png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH * 1.574 + png_sizeof(png_color)); 1.575 + png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); 1.576 + info_ptr->palette = png_ptr->palette; 1.577 + info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; 1.578 + 1.579 +#ifdef PNG_FREE_ME_SUPPORTED 1.580 + info_ptr->free_me |= PNG_FREE_PLTE; 1.581 +#else 1.582 + png_ptr->flags |= PNG_FLAG_FREE_PLTE; 1.583 +#endif 1.584 + 1.585 + info_ptr->valid |= PNG_INFO_PLTE; 1.586 +} 1.587 + 1.588 +#if defined(PNG_sBIT_SUPPORTED) 1.589 +void PNGAPI 1.590 +png_set_sBIT(png_structp png_ptr, png_infop info_ptr, 1.591 + png_color_8p sig_bit) 1.592 +{ 1.593 + png_debug1(1, "in %s storage function\n", "sBIT"); 1.594 + if (png_ptr == NULL || info_ptr == NULL) 1.595 + return; 1.596 + 1.597 + png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8)); 1.598 + info_ptr->valid |= PNG_INFO_sBIT; 1.599 +} 1.600 +#endif 1.601 + 1.602 +#if defined(PNG_sRGB_SUPPORTED) 1.603 +void PNGAPI 1.604 +png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) 1.605 +{ 1.606 + png_debug1(1, "in %s storage function\n", "sRGB"); 1.607 + if (png_ptr == NULL || info_ptr == NULL) 1.608 + return; 1.609 + 1.610 + info_ptr->srgb_intent = (png_byte)intent; 1.611 + info_ptr->valid |= PNG_INFO_sRGB; 1.612 +} 1.613 + 1.614 +void PNGAPI 1.615 +png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, 1.616 + int intent) 1.617 +{ 1.618 +#if defined(PNG_gAMA_SUPPORTED) 1.619 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.620 + float file_gamma; 1.621 +#endif 1.622 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.623 + png_fixed_point int_file_gamma; 1.624 +#endif 1.625 +#endif 1.626 +#if defined(PNG_cHRM_SUPPORTED) 1.627 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.628 + float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; 1.629 +#endif 1.630 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.631 + png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, 1.632 + int_green_y, int_blue_x, int_blue_y; 1.633 +#endif 1.634 +#endif 1.635 + png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM"); 1.636 + if (png_ptr == NULL || info_ptr == NULL) 1.637 + return; 1.638 + 1.639 + png_set_sRGB(png_ptr, info_ptr, intent); 1.640 + 1.641 +#if defined(PNG_gAMA_SUPPORTED) 1.642 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.643 + file_gamma = (float).45455; 1.644 + png_set_gAMA(png_ptr, info_ptr, file_gamma); 1.645 +#endif 1.646 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.647 + int_file_gamma = 45455L; 1.648 + png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); 1.649 +#endif 1.650 +#endif 1.651 + 1.652 +#if defined(PNG_cHRM_SUPPORTED) 1.653 +#ifdef PNG_FIXED_POINT_SUPPORTED 1.654 + int_white_x = 31270L; 1.655 + int_white_y = 32900L; 1.656 + int_red_x = 64000L; 1.657 + int_red_y = 33000L; 1.658 + int_green_x = 30000L; 1.659 + int_green_y = 60000L; 1.660 + int_blue_x = 15000L; 1.661 + int_blue_y = 6000L; 1.662 + 1.663 + png_set_cHRM_fixed(png_ptr, info_ptr, 1.664 + int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y, 1.665 + int_blue_x, int_blue_y); 1.666 +#endif 1.667 +#ifdef PNG_FLOATING_POINT_SUPPORTED 1.668 + white_x = (float).3127; 1.669 + white_y = (float).3290; 1.670 + red_x = (float).64; 1.671 + red_y = (float).33; 1.672 + green_x = (float).30; 1.673 + green_y = (float).60; 1.674 + blue_x = (float).15; 1.675 + blue_y = (float).06; 1.676 + 1.677 + png_set_cHRM(png_ptr, info_ptr, 1.678 + white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); 1.679 +#endif 1.680 +#endif 1.681 +} 1.682 +#endif 1.683 + 1.684 + 1.685 +#if defined(PNG_iCCP_SUPPORTED) 1.686 +void PNGAPI 1.687 +png_set_iCCP(png_structp png_ptr, png_infop info_ptr, 1.688 + png_charp name, int compression_type, 1.689 + png_charp profile, png_uint_32 proflen) 1.690 +{ 1.691 + png_charp new_iccp_name; 1.692 + png_charp new_iccp_profile; 1.693 + png_uint_32 length; 1.694 + 1.695 + png_debug1(1, "in %s storage function\n", "iCCP"); 1.696 + if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) 1.697 + return; 1.698 + 1.699 + length = png_strlen(name)+1; 1.700 + new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); 1.701 + if (new_iccp_name == NULL) 1.702 + { 1.703 + png_warning(png_ptr, "Insufficient memory to process iCCP chunk."); 1.704 + return; 1.705 + } 1.706 + png_memcpy(new_iccp_name, name, length); 1.707 + new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen); 1.708 + if (new_iccp_profile == NULL) 1.709 + { 1.710 + png_free (png_ptr, new_iccp_name); 1.711 + png_warning(png_ptr, 1.712 + "Insufficient memory to process iCCP profile."); 1.713 + return; 1.714 + } 1.715 + png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); 1.716 + 1.717 + png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); 1.718 + 1.719 + info_ptr->iccp_proflen = proflen; 1.720 + info_ptr->iccp_name = new_iccp_name; 1.721 + info_ptr->iccp_profile = new_iccp_profile; 1.722 + /* Compression is always zero but is here so the API and info structure 1.723 + * does not have to change if we introduce multiple compression types */ 1.724 + info_ptr->iccp_compression = (png_byte)compression_type; 1.725 +#ifdef PNG_FREE_ME_SUPPORTED 1.726 + info_ptr->free_me |= PNG_FREE_ICCP; 1.727 +#endif 1.728 + info_ptr->valid |= PNG_INFO_iCCP; 1.729 +} 1.730 +#endif 1.731 + 1.732 +#if defined(PNG_TEXT_SUPPORTED) 1.733 +void PNGAPI 1.734 +png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, 1.735 + int num_text) 1.736 +{ 1.737 + int ret; 1.738 + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); 1.739 + if (ret) 1.740 + png_error(png_ptr, "Insufficient memory to store text"); 1.741 +} 1.742 + 1.743 +int /* PRIVATE */ 1.744 +png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, 1.745 + int num_text) 1.746 +{ 1.747 + int i; 1.748 + 1.749 + png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ? 1.750 + "text" : (png_const_charp)png_ptr->chunk_name)); 1.751 + 1.752 + if (png_ptr == NULL || info_ptr == NULL || num_text == 0) 1.753 + return(0); 1.754 + 1.755 + /* Make sure we have enough space in the "text" array in info_struct 1.756 + * to hold all of the incoming text_ptr objects. 1.757 + */ 1.758 + if (info_ptr->num_text + num_text > info_ptr->max_text) 1.759 + { 1.760 + if (info_ptr->text != NULL) 1.761 + { 1.762 + png_textp old_text; 1.763 + int old_max; 1.764 + 1.765 + old_max = info_ptr->max_text; 1.766 + info_ptr->max_text = info_ptr->num_text + num_text + 8; 1.767 + old_text = info_ptr->text; 1.768 + info_ptr->text = (png_textp)png_malloc_warn(png_ptr, 1.769 + (png_uint_32)(info_ptr->max_text * png_sizeof(png_text))); 1.770 + if (info_ptr->text == NULL) 1.771 + { 1.772 + png_free(png_ptr, old_text); 1.773 + return(1); 1.774 + } 1.775 + png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * 1.776 + png_sizeof(png_text))); 1.777 + png_free(png_ptr, old_text); 1.778 + } 1.779 + else 1.780 + { 1.781 + info_ptr->max_text = num_text + 8; 1.782 + info_ptr->num_text = 0; 1.783 + info_ptr->text = (png_textp)png_malloc_warn(png_ptr, 1.784 + (png_uint_32)(info_ptr->max_text * png_sizeof(png_text))); 1.785 + if (info_ptr->text == NULL) 1.786 + return(1); 1.787 +#ifdef PNG_FREE_ME_SUPPORTED 1.788 + info_ptr->free_me |= PNG_FREE_TEXT; 1.789 +#endif 1.790 + } 1.791 + png_debug1(3, "allocated %d entries for info_ptr->text\n", 1.792 + info_ptr->max_text); 1.793 + } 1.794 + for (i = 0; i < num_text; i++) 1.795 + { 1.796 + png_size_t text_length, key_len; 1.797 + png_size_t lang_len, lang_key_len; 1.798 + png_textp textp = &(info_ptr->text[info_ptr->num_text]); 1.799 + 1.800 + if (text_ptr[i].key == NULL) 1.801 + continue; 1.802 + 1.803 + key_len = png_strlen(text_ptr[i].key); 1.804 + 1.805 + if (text_ptr[i].compression <= 0) 1.806 + { 1.807 + lang_len = 0; 1.808 + lang_key_len = 0; 1.809 + } 1.810 + else 1.811 +#ifdef PNG_iTXt_SUPPORTED 1.812 + { 1.813 + /* set iTXt data */ 1.814 + if (text_ptr[i].lang != NULL) 1.815 + lang_len = png_strlen(text_ptr[i].lang); 1.816 + else 1.817 + lang_len = 0; 1.818 + if (text_ptr[i].lang_key != NULL) 1.819 + lang_key_len = png_strlen(text_ptr[i].lang_key); 1.820 + else 1.821 + lang_key_len = 0; 1.822 + } 1.823 +#else 1.824 + { 1.825 + png_warning(png_ptr, "iTXt chunk not supported."); 1.826 + continue; 1.827 + } 1.828 +#endif 1.829 + 1.830 + if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') 1.831 + { 1.832 + text_length = 0; 1.833 +#ifdef PNG_iTXt_SUPPORTED 1.834 + if (text_ptr[i].compression > 0) 1.835 + textp->compression = PNG_ITXT_COMPRESSION_NONE; 1.836 + else 1.837 +#endif 1.838 + textp->compression = PNG_TEXT_COMPRESSION_NONE; 1.839 + } 1.840 + else 1.841 + { 1.842 + text_length = png_strlen(text_ptr[i].text); 1.843 + textp->compression = text_ptr[i].compression; 1.844 + } 1.845 + 1.846 + textp->key = (png_charp)png_malloc_warn(png_ptr, 1.847 + (png_uint_32) 1.848 + (key_len + text_length + lang_len + lang_key_len + 4)); 1.849 + if (textp->key == NULL) 1.850 + return(1); 1.851 + png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n", 1.852 + (png_uint_32) 1.853 + (key_len + lang_len + lang_key_len + text_length + 4), 1.854 + (int)textp->key); 1.855 + 1.856 + png_memcpy(textp->key, text_ptr[i].key, 1.857 + (png_size_t)(key_len)); 1.858 + *(textp->key + key_len) = '\0'; 1.859 +#ifdef PNG_iTXt_SUPPORTED 1.860 + if (text_ptr[i].compression > 0) 1.861 + { 1.862 + textp->lang = textp->key + key_len + 1; 1.863 + png_memcpy(textp->lang, text_ptr[i].lang, lang_len); 1.864 + *(textp->lang + lang_len) = '\0'; 1.865 + textp->lang_key = textp->lang + lang_len + 1; 1.866 + png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); 1.867 + *(textp->lang_key + lang_key_len) = '\0'; 1.868 + textp->text = textp->lang_key + lang_key_len + 1; 1.869 + } 1.870 + else 1.871 +#endif 1.872 + { 1.873 +#ifdef PNG_iTXt_SUPPORTED 1.874 + textp->lang=NULL; 1.875 + textp->lang_key=NULL; 1.876 +#endif 1.877 + textp->text = textp->key + key_len + 1; 1.878 + } 1.879 + if (text_length) 1.880 + png_memcpy(textp->text, text_ptr[i].text, 1.881 + (png_size_t)(text_length)); 1.882 + *(textp->text + text_length) = '\0'; 1.883 + 1.884 +#ifdef PNG_iTXt_SUPPORTED 1.885 + if (textp->compression > 0) 1.886 + { 1.887 + textp->text_length = 0; 1.888 + textp->itxt_length = text_length; 1.889 + } 1.890 + else 1.891 +#endif 1.892 + { 1.893 + textp->text_length = text_length; 1.894 +#ifdef PNG_iTXt_SUPPORTED 1.895 + textp->itxt_length = 0; 1.896 +#endif 1.897 + } 1.898 + info_ptr->num_text++; 1.899 + png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); 1.900 + } 1.901 + return(0); 1.902 +} 1.903 +#endif 1.904 + 1.905 +#if defined(PNG_tIME_SUPPORTED) 1.906 +void PNGAPI 1.907 +png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) 1.908 +{ 1.909 + png_debug1(1, "in %s storage function\n", "tIME"); 1.910 + if (png_ptr == NULL || info_ptr == NULL || 1.911 + (png_ptr->mode & PNG_WROTE_tIME)) 1.912 + return; 1.913 + 1.914 + png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time)); 1.915 + info_ptr->valid |= PNG_INFO_tIME; 1.916 +} 1.917 +#endif 1.918 + 1.919 +#if defined(PNG_tRNS_SUPPORTED) 1.920 +void PNGAPI 1.921 +png_set_tRNS(png_structp png_ptr, png_infop info_ptr, 1.922 + png_bytep trans, int num_trans, png_color_16p trans_values) 1.923 +{ 1.924 + png_debug1(1, "in %s storage function\n", "tRNS"); 1.925 + if (png_ptr == NULL || info_ptr == NULL) 1.926 + return; 1.927 + 1.928 + if (trans != NULL) 1.929 + { 1.930 + /* 1.931 + * It may not actually be necessary to set png_ptr->trans here; 1.932 + * we do it for backward compatibility with the way the png_handle_tRNS 1.933 + * function used to do the allocation. 1.934 + */ 1.935 + 1.936 +#ifdef PNG_FREE_ME_SUPPORTED 1.937 + png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); 1.938 +#endif 1.939 + 1.940 + /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ 1.941 + png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr, 1.942 + (png_uint_32)PNG_MAX_PALETTE_LENGTH); 1.943 + if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) 1.944 + png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans); 1.945 + } 1.946 + 1.947 + if (trans_values != NULL) 1.948 + { 1.949 + int sample_max = (1 << info_ptr->bit_depth); 1.950 + if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && 1.951 + (int)trans_values->gray > sample_max) || 1.952 + (info_ptr->color_type == PNG_COLOR_TYPE_RGB && 1.953 + ((int)trans_values->red > sample_max || 1.954 + (int)trans_values->green > sample_max || 1.955 + (int)trans_values->blue > sample_max))) 1.956 + png_warning(png_ptr, 1.957 + "tRNS chunk has out-of-range samples for bit_depth"); 1.958 + png_memcpy(&(info_ptr->trans_values), trans_values, 1.959 + png_sizeof(png_color_16)); 1.960 + if (num_trans == 0) 1.961 + num_trans = 1; 1.962 + } 1.963 + 1.964 + info_ptr->num_trans = (png_uint_16)num_trans; 1.965 + if (num_trans != 0) 1.966 + { 1.967 + info_ptr->valid |= PNG_INFO_tRNS; 1.968 +#ifdef PNG_FREE_ME_SUPPORTED 1.969 + info_ptr->free_me |= PNG_FREE_TRNS; 1.970 +#else 1.971 + png_ptr->flags |= PNG_FLAG_FREE_TRNS; 1.972 +#endif 1.973 + } 1.974 +} 1.975 +#endif 1.976 + 1.977 +#if defined(PNG_sPLT_SUPPORTED) 1.978 +void PNGAPI 1.979 +png_set_sPLT(png_structp png_ptr, 1.980 + png_infop info_ptr, png_sPLT_tp entries, int nentries) 1.981 +/* 1.982 + * entries - array of png_sPLT_t structures 1.983 + * to be added to the list of palettes 1.984 + * in the info structure. 1.985 + * nentries - number of palette structures to be 1.986 + * added. 1.987 + */ 1.988 +{ 1.989 + png_sPLT_tp np; 1.990 + int i; 1.991 + 1.992 + if (png_ptr == NULL || info_ptr == NULL) 1.993 + return; 1.994 + 1.995 + np = (png_sPLT_tp)png_malloc_warn(png_ptr, 1.996 + (info_ptr->splt_palettes_num + nentries) * 1.997 + (png_uint_32)png_sizeof(png_sPLT_t)); 1.998 + if (np == NULL) 1.999 + { 1.1000 + png_warning(png_ptr, "No memory for sPLT palettes."); 1.1001 + return; 1.1002 + } 1.1003 + 1.1004 + png_memcpy(np, info_ptr->splt_palettes, 1.1005 + info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); 1.1006 + png_free(png_ptr, info_ptr->splt_palettes); 1.1007 + info_ptr->splt_palettes=NULL; 1.1008 + 1.1009 + for (i = 0; i < nentries; i++) 1.1010 + { 1.1011 + png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; 1.1012 + png_sPLT_tp from = entries + i; 1.1013 + png_uint_32 length; 1.1014 + 1.1015 + length = png_strlen(from->name) + 1; 1.1016 + to->name = (png_charp)png_malloc_warn(png_ptr, length); 1.1017 + if (to->name == NULL) 1.1018 + { 1.1019 + png_warning(png_ptr, 1.1020 + "Out of memory while processing sPLT chunk"); 1.1021 + continue; 1.1022 + } 1.1023 + png_memcpy(to->name, from->name, length); 1.1024 + to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, 1.1025 + (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry))); 1.1026 + if (to->entries == NULL) 1.1027 + { 1.1028 + png_warning(png_ptr, 1.1029 + "Out of memory while processing sPLT chunk"); 1.1030 + png_free(png_ptr, to->name); 1.1031 + to->name = NULL; 1.1032 + continue; 1.1033 + } 1.1034 + png_memcpy(to->entries, from->entries, 1.1035 + from->nentries * png_sizeof(png_sPLT_entry)); 1.1036 + to->nentries = from->nentries; 1.1037 + to->depth = from->depth; 1.1038 + } 1.1039 + 1.1040 + info_ptr->splt_palettes = np; 1.1041 + info_ptr->splt_palettes_num += nentries; 1.1042 + info_ptr->valid |= PNG_INFO_sPLT; 1.1043 +#ifdef PNG_FREE_ME_SUPPORTED 1.1044 + info_ptr->free_me |= PNG_FREE_SPLT; 1.1045 +#endif 1.1046 +} 1.1047 +#endif /* PNG_sPLT_SUPPORTED */ 1.1048 + 1.1049 +#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) 1.1050 +void PNGAPI 1.1051 +png_set_unknown_chunks(png_structp png_ptr, 1.1052 + png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) 1.1053 +{ 1.1054 + png_unknown_chunkp np; 1.1055 + int i; 1.1056 + 1.1057 + if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) 1.1058 + return; 1.1059 + 1.1060 + np = (png_unknown_chunkp)png_malloc_warn(png_ptr, 1.1061 + (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) * 1.1062 + png_sizeof(png_unknown_chunk))); 1.1063 + if (np == NULL) 1.1064 + { 1.1065 + png_warning(png_ptr, 1.1066 + "Out of memory while processing unknown chunk."); 1.1067 + return; 1.1068 + } 1.1069 + 1.1070 + png_memcpy(np, info_ptr->unknown_chunks, 1.1071 + info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk)); 1.1072 + png_free(png_ptr, info_ptr->unknown_chunks); 1.1073 + info_ptr->unknown_chunks=NULL; 1.1074 + 1.1075 + for (i = 0; i < num_unknowns; i++) 1.1076 + { 1.1077 + png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; 1.1078 + png_unknown_chunkp from = unknowns + i; 1.1079 + 1.1080 + png_memcpy((png_charp)to->name, 1.1081 + (png_charp)from->name, 1.1082 + png_sizeof(from->name)); 1.1083 + to->name[png_sizeof(to->name)-1] = '\0'; 1.1084 + to->size = from->size; 1.1085 + /* note our location in the read or write sequence */ 1.1086 + to->location = (png_byte)(png_ptr->mode & 0xff); 1.1087 + 1.1088 + if (from->size == 0) 1.1089 + to->data=NULL; 1.1090 + else 1.1091 + { 1.1092 + to->data = (png_bytep)png_malloc_warn(png_ptr, 1.1093 + (png_uint_32)from->size); 1.1094 + if (to->data == NULL) 1.1095 + { 1.1096 + png_warning(png_ptr, 1.1097 + "Out of memory while processing unknown chunk."); 1.1098 + to->size = 0; 1.1099 + } 1.1100 + else 1.1101 + png_memcpy(to->data, from->data, from->size); 1.1102 + } 1.1103 + } 1.1104 + 1.1105 + info_ptr->unknown_chunks = np; 1.1106 + info_ptr->unknown_chunks_num += num_unknowns; 1.1107 +#ifdef PNG_FREE_ME_SUPPORTED 1.1108 + info_ptr->free_me |= PNG_FREE_UNKN; 1.1109 +#endif 1.1110 +} 1.1111 +void PNGAPI 1.1112 +png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, 1.1113 + int chunk, int location) 1.1114 +{ 1.1115 + if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < 1.1116 + (int)info_ptr->unknown_chunks_num) 1.1117 + info_ptr->unknown_chunks[chunk].location = (png_byte)location; 1.1118 +} 1.1119 +#endif 1.1120 + 1.1121 +#if defined(PNG_1_0_X) || defined(PNG_1_2_X) 1.1122 +#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ 1.1123 + defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) 1.1124 +void PNGAPI 1.1125 +png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) 1.1126 +{ 1.1127 + /* This function is deprecated in favor of png_permit_mng_features() 1.1128 + and will be removed from libpng-1.3.0 */ 1.1129 + png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n"); 1.1130 + if (png_ptr == NULL) 1.1131 + return; 1.1132 + png_ptr->mng_features_permitted = (png_byte) 1.1133 + ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) | 1.1134 + ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE))); 1.1135 +} 1.1136 +#endif 1.1137 +#endif 1.1138 + 1.1139 +#if defined(PNG_MNG_FEATURES_SUPPORTED) 1.1140 +png_uint_32 PNGAPI 1.1141 +png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) 1.1142 +{ 1.1143 + png_debug(1, "in png_permit_mng_features\n"); 1.1144 + if (png_ptr == NULL) 1.1145 + return (png_uint_32)0; 1.1146 + png_ptr->mng_features_permitted = 1.1147 + (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); 1.1148 + return (png_uint_32)png_ptr->mng_features_permitted; 1.1149 +} 1.1150 +#endif 1.1151 + 1.1152 +#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) 1.1153 +void PNGAPI 1.1154 +png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep 1.1155 + chunk_list, int num_chunks) 1.1156 +{ 1.1157 + png_bytep new_list, p; 1.1158 + int i, old_num_chunks; 1.1159 + if (png_ptr == NULL) 1.1160 + return; 1.1161 + if (num_chunks == 0) 1.1162 + { 1.1163 + if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) 1.1164 + png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; 1.1165 + else 1.1166 + png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; 1.1167 + 1.1168 + if (keep == PNG_HANDLE_CHUNK_ALWAYS) 1.1169 + png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; 1.1170 + else 1.1171 + png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; 1.1172 + return; 1.1173 + } 1.1174 + if (chunk_list == NULL) 1.1175 + return; 1.1176 + old_num_chunks = png_ptr->num_chunk_list; 1.1177 + new_list=(png_bytep)png_malloc(png_ptr, 1.1178 + (png_uint_32) 1.1179 + (5*(num_chunks + old_num_chunks))); 1.1180 + if (png_ptr->chunk_list != NULL) 1.1181 + { 1.1182 + png_memcpy(new_list, png_ptr->chunk_list, 1.1183 + (png_size_t)(5*old_num_chunks)); 1.1184 + png_free(png_ptr, png_ptr->chunk_list); 1.1185 + png_ptr->chunk_list=NULL; 1.1186 + } 1.1187 + png_memcpy(new_list + 5*old_num_chunks, chunk_list, 1.1188 + (png_size_t)(5*num_chunks)); 1.1189 + for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5) 1.1190 + *p=(png_byte)keep; 1.1191 + png_ptr->num_chunk_list = old_num_chunks + num_chunks; 1.1192 + png_ptr->chunk_list = new_list; 1.1193 +#ifdef PNG_FREE_ME_SUPPORTED 1.1194 + png_ptr->free_me |= PNG_FREE_LIST; 1.1195 +#endif 1.1196 +} 1.1197 +#endif 1.1198 + 1.1199 +#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) 1.1200 +void PNGAPI 1.1201 +png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, 1.1202 + png_user_chunk_ptr read_user_chunk_fn) 1.1203 +{ 1.1204 + png_debug(1, "in png_set_read_user_chunk_fn\n"); 1.1205 + if (png_ptr == NULL) 1.1206 + return; 1.1207 + png_ptr->read_user_chunk_fn = read_user_chunk_fn; 1.1208 + png_ptr->user_chunk_ptr = user_chunk_ptr; 1.1209 +} 1.1210 +#endif 1.1211 + 1.1212 +#if defined(PNG_INFO_IMAGE_SUPPORTED) 1.1213 +void PNGAPI 1.1214 +png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) 1.1215 +{ 1.1216 + png_debug1(1, "in %s storage function\n", "rows"); 1.1217 + 1.1218 + if (png_ptr == NULL || info_ptr == NULL) 1.1219 + return; 1.1220 + 1.1221 + if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) 1.1222 + png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); 1.1223 + info_ptr->row_pointers = row_pointers; 1.1224 + if (row_pointers) 1.1225 + info_ptr->valid |= PNG_INFO_IDAT; 1.1226 +} 1.1227 +#endif 1.1228 + 1.1229 +#ifdef PNG_WRITE_SUPPORTED 1.1230 +void PNGAPI 1.1231 +png_set_compression_buffer_size(png_structp png_ptr, 1.1232 + png_uint_32 size) 1.1233 +{ 1.1234 + if (png_ptr == NULL) 1.1235 + return; 1.1236 + png_free(png_ptr, png_ptr->zbuf); 1.1237 + png_ptr->zbuf_size = (png_size_t)size; 1.1238 + png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); 1.1239 + png_ptr->zstream.next_out = png_ptr->zbuf; 1.1240 + png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; 1.1241 +} 1.1242 +#endif 1.1243 + 1.1244 +void PNGAPI 1.1245 +png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) 1.1246 +{ 1.1247 + if (png_ptr && info_ptr) 1.1248 + info_ptr->valid &= ~mask; 1.1249 +} 1.1250 + 1.1251 + 1.1252 +#ifndef PNG_1_0_X 1.1253 +#ifdef PNG_ASSEMBLER_CODE_SUPPORTED 1.1254 +/* function was added to libpng 1.2.0 and should always exist by default */ 1.1255 +void PNGAPI 1.1256 +png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags) 1.1257 +{ 1.1258 +/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ 1.1259 + if (png_ptr != NULL) 1.1260 + png_ptr->asm_flags = 0; 1.1261 + asm_flags = asm_flags; /* Quiet the compiler */ 1.1262 +} 1.1263 + 1.1264 +/* this function was added to libpng 1.2.0 */ 1.1265 +void PNGAPI 1.1266 +png_set_mmx_thresholds (png_structp png_ptr, 1.1267 + png_byte mmx_bitdepth_threshold, 1.1268 + png_uint_32 mmx_rowbytes_threshold) 1.1269 +{ 1.1270 +/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ 1.1271 + if (png_ptr == NULL) 1.1272 + return; 1.1273 + /* Quiet the compiler */ 1.1274 + mmx_bitdepth_threshold = mmx_bitdepth_threshold; 1.1275 + mmx_rowbytes_threshold = mmx_rowbytes_threshold; 1.1276 +} 1.1277 +#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ 1.1278 + 1.1279 +#ifdef PNG_SET_USER_LIMITS_SUPPORTED 1.1280 +/* this function was added to libpng 1.2.6 */ 1.1281 +void PNGAPI 1.1282 +png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, 1.1283 + png_uint_32 user_height_max) 1.1284 +{ 1.1285 + /* Images with dimensions larger than these limits will be 1.1286 + * rejected by png_set_IHDR(). To accept any PNG datastream 1.1287 + * regardless of dimensions, set both limits to 0x7ffffffL. 1.1288 + */ 1.1289 + if (png_ptr == NULL) return; 1.1290 + png_ptr->user_width_max = user_width_max; 1.1291 + png_ptr->user_height_max = user_height_max; 1.1292 +} 1.1293 +#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ 1.1294 + 1.1295 +#endif /* ?PNG_1_0_X */ 1.1296 +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */