1 | |
---|
2 | /* pngset.c - storage of image information into info struct |
---|
3 | * |
---|
4 | * libpng 1.2.1 - December 12, 2001 |
---|
5 | * For conditions of distribution and use, see copyright notice in png.h |
---|
6 | * Copyright (c) 1998-2001 Glenn Randers-Pehrson |
---|
7 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
---|
8 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
---|
9 | * |
---|
10 | * The functions here are used during reads to store data from the file |
---|
11 | * into the info struct, and during writes to store application data |
---|
12 | * into the info struct for writing into the file. This abstracts the |
---|
13 | * info struct and allows us to change the structure in the future. |
---|
14 | */ |
---|
15 | |
---|
16 | #define PNG_INTERNAL |
---|
17 | #include "png.h" |
---|
18 | |
---|
19 | #if defined(PNG_bKGD_SUPPORTED) |
---|
20 | void PNGAPI |
---|
21 | png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) |
---|
22 | { |
---|
23 | png_debug1(1, "in %s storage function\n", "bKGD"); |
---|
24 | if (png_ptr == NULL || info_ptr == NULL) |
---|
25 | return; |
---|
26 | |
---|
27 | png_memcpy(&(info_ptr->background), background, sizeof(png_color_16)); |
---|
28 | info_ptr->valid |= PNG_INFO_bKGD; |
---|
29 | } |
---|
30 | #endif |
---|
31 | |
---|
32 | #if defined(PNG_cHRM_SUPPORTED) |
---|
33 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
34 | void PNGAPI |
---|
35 | png_set_cHRM(png_structp png_ptr, png_infop info_ptr, |
---|
36 | double white_x, double white_y, double red_x, double red_y, |
---|
37 | double green_x, double green_y, double blue_x, double blue_y) |
---|
38 | { |
---|
39 | png_debug1(1, "in %s storage function\n", "cHRM"); |
---|
40 | if (png_ptr == NULL || info_ptr == NULL) |
---|
41 | return; |
---|
42 | |
---|
43 | info_ptr->x_white = (float)white_x; |
---|
44 | info_ptr->y_white = (float)white_y; |
---|
45 | info_ptr->x_red = (float)red_x; |
---|
46 | info_ptr->y_red = (float)red_y; |
---|
47 | info_ptr->x_green = (float)green_x; |
---|
48 | info_ptr->y_green = (float)green_y; |
---|
49 | info_ptr->x_blue = (float)blue_x; |
---|
50 | info_ptr->y_blue = (float)blue_y; |
---|
51 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
52 | info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5); |
---|
53 | info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5); |
---|
54 | info_ptr->int_x_red = (png_fixed_point)(red_x*100000.+0.5); |
---|
55 | info_ptr->int_y_red = (png_fixed_point)(red_y*100000.+0.5); |
---|
56 | info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5); |
---|
57 | info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5); |
---|
58 | info_ptr->int_x_blue = (png_fixed_point)(blue_x*100000.+0.5); |
---|
59 | info_ptr->int_y_blue = (png_fixed_point)(blue_y*100000.+0.5); |
---|
60 | #endif |
---|
61 | info_ptr->valid |= PNG_INFO_cHRM; |
---|
62 | } |
---|
63 | #endif |
---|
64 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
65 | void PNGAPI |
---|
66 | png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, |
---|
67 | png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, |
---|
68 | png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, |
---|
69 | png_fixed_point blue_x, png_fixed_point blue_y) |
---|
70 | { |
---|
71 | png_debug1(1, "in %s storage function\n", "cHRM"); |
---|
72 | if (png_ptr == NULL || info_ptr == NULL) |
---|
73 | return; |
---|
74 | |
---|
75 | info_ptr->int_x_white = white_x; |
---|
76 | info_ptr->int_y_white = white_y; |
---|
77 | info_ptr->int_x_red = red_x; |
---|
78 | info_ptr->int_y_red = red_y; |
---|
79 | info_ptr->int_x_green = green_x; |
---|
80 | info_ptr->int_y_green = green_y; |
---|
81 | info_ptr->int_x_blue = blue_x; |
---|
82 | info_ptr->int_y_blue = blue_y; |
---|
83 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
84 | info_ptr->x_white = (float)(white_x/100000.); |
---|
85 | info_ptr->y_white = (float)(white_y/100000.); |
---|
86 | info_ptr->x_red = (float)(red_x/100000.); |
---|
87 | info_ptr->y_red = (float)(red_y/100000.); |
---|
88 | info_ptr->x_green = (float)(green_x/100000.); |
---|
89 | info_ptr->y_green = (float)(green_y/100000.); |
---|
90 | info_ptr->x_blue = (float)(blue_x/100000.); |
---|
91 | info_ptr->y_blue = (float)(blue_y/100000.); |
---|
92 | #endif |
---|
93 | info_ptr->valid |= PNG_INFO_cHRM; |
---|
94 | } |
---|
95 | #endif |
---|
96 | #endif |
---|
97 | |
---|
98 | #if defined(PNG_gAMA_SUPPORTED) |
---|
99 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
100 | void PNGAPI |
---|
101 | png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) |
---|
102 | { |
---|
103 | png_debug1(1, "in %s storage function\n", "gAMA"); |
---|
104 | if (png_ptr == NULL || info_ptr == NULL) |
---|
105 | return; |
---|
106 | |
---|
107 | info_ptr->gamma = (float)file_gamma; |
---|
108 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
109 | info_ptr->int_gamma = (int)(file_gamma*100000.+.5); |
---|
110 | #endif |
---|
111 | info_ptr->valid |= PNG_INFO_gAMA; |
---|
112 | if(file_gamma == 0.0) |
---|
113 | png_warning(png_ptr, "Setting gamma=0"); |
---|
114 | } |
---|
115 | #endif |
---|
116 | void PNGAPI |
---|
117 | png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point |
---|
118 | int_gamma) |
---|
119 | { |
---|
120 | png_debug1(1, "in %s storage function\n", "gAMA"); |
---|
121 | if (png_ptr == NULL || info_ptr == NULL) |
---|
122 | return; |
---|
123 | |
---|
124 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
125 | info_ptr->gamma = (float)(int_gamma/100000.); |
---|
126 | #endif |
---|
127 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
128 | info_ptr->int_gamma = int_gamma; |
---|
129 | #endif |
---|
130 | info_ptr->valid |= PNG_INFO_gAMA; |
---|
131 | if(int_gamma == 0) |
---|
132 | png_warning(png_ptr, "Setting gamma=0"); |
---|
133 | } |
---|
134 | #endif |
---|
135 | |
---|
136 | #if defined(PNG_hIST_SUPPORTED) |
---|
137 | void PNGAPI |
---|
138 | png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) |
---|
139 | { |
---|
140 | int i; |
---|
141 | |
---|
142 | png_debug1(1, "in %s storage function\n", "hIST"); |
---|
143 | if (png_ptr == NULL || info_ptr == NULL) |
---|
144 | return; |
---|
145 | if (info_ptr->num_palette == 0) |
---|
146 | { |
---|
147 | png_warning(png_ptr, |
---|
148 | "Palette size 0, hIST allocation skipped."); |
---|
149 | return; |
---|
150 | } |
---|
151 | |
---|
152 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
153 | png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); |
---|
154 | #endif |
---|
155 | /* Changed from info->num_palette to 256 in version 1.2.1 */ |
---|
156 | png_ptr->hist = (png_uint_16p)png_malloc(png_ptr, |
---|
157 | (png_uint_32)(256 * sizeof (png_uint_16))); |
---|
158 | |
---|
159 | for (i = 0; i < info_ptr->num_palette; i++) |
---|
160 | png_ptr->hist[i] = hist[i]; |
---|
161 | info_ptr->hist = png_ptr->hist; |
---|
162 | info_ptr->valid |= PNG_INFO_hIST; |
---|
163 | |
---|
164 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
165 | info_ptr->free_me |= PNG_FREE_HIST; |
---|
166 | #else |
---|
167 | png_ptr->flags |= PNG_FLAG_FREE_HIST; |
---|
168 | #endif |
---|
169 | } |
---|
170 | #endif |
---|
171 | |
---|
172 | void PNGAPI |
---|
173 | png_set_IHDR(png_structp png_ptr, png_infop info_ptr, |
---|
174 | png_uint_32 width, png_uint_32 height, int bit_depth, |
---|
175 | int color_type, int interlace_type, int compression_type, |
---|
176 | int filter_type) |
---|
177 | { |
---|
178 | int rowbytes_per_pixel; |
---|
179 | png_debug1(1, "in %s storage function\n", "IHDR"); |
---|
180 | if (png_ptr == NULL || info_ptr == NULL) |
---|
181 | return; |
---|
182 | |
---|
183 | /* check for width and height valid values */ |
---|
184 | if (width == 0 || height == 0) |
---|
185 | png_error(png_ptr, "Image width or height is zero in IHDR"); |
---|
186 | if (width > PNG_MAX_UINT || height > PNG_MAX_UINT) |
---|
187 | png_error(png_ptr, "Invalid image size in IHDR"); |
---|
188 | |
---|
189 | /* check other values */ |
---|
190 | if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && |
---|
191 | bit_depth != 8 && bit_depth != 16) |
---|
192 | png_error(png_ptr, "Invalid bit depth in IHDR"); |
---|
193 | |
---|
194 | if (color_type < 0 || color_type == 1 || |
---|
195 | color_type == 5 || color_type > 6) |
---|
196 | png_error(png_ptr, "Invalid color type in IHDR"); |
---|
197 | |
---|
198 | if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || |
---|
199 | ((color_type == PNG_COLOR_TYPE_RGB || |
---|
200 | color_type == PNG_COLOR_TYPE_GRAY_ALPHA || |
---|
201 | color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) |
---|
202 | png_error(png_ptr, "Invalid color type/bit depth combination in IHDR"); |
---|
203 | |
---|
204 | if (interlace_type >= PNG_INTERLACE_LAST) |
---|
205 | png_error(png_ptr, "Unknown interlace method in IHDR"); |
---|
206 | |
---|
207 | if (compression_type != PNG_COMPRESSION_TYPE_BASE) |
---|
208 | png_error(png_ptr, "Unknown compression method in IHDR"); |
---|
209 | |
---|
210 | #if defined(PNG_MNG_FEATURES_SUPPORTED) |
---|
211 | /* Accept filter_method 64 (intrapixel differencing) only if |
---|
212 | * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and |
---|
213 | * 2. Libpng did not read a PNG signature (this filter_method is only |
---|
214 | * used in PNG datastreams that are embedded in MNG datastreams) and |
---|
215 | * 3. The application called png_permit_mng_features with a mask that |
---|
216 | * included PNG_FLAG_MNG_FILTER_64 and |
---|
217 | * 4. The filter_method is 64 and |
---|
218 | * 5. The color_type is RGB or RGBA |
---|
219 | */ |
---|
220 | if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted) |
---|
221 | png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n"); |
---|
222 | if(filter_type != PNG_FILTER_TYPE_BASE) |
---|
223 | { |
---|
224 | if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && |
---|
225 | (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && |
---|
226 | ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && |
---|
227 | (color_type == PNG_COLOR_TYPE_RGB || |
---|
228 | color_type == PNG_COLOR_TYPE_RGB_ALPHA))) |
---|
229 | png_error(png_ptr, "Unknown filter method in IHDR"); |
---|
230 | if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) |
---|
231 | png_warning(png_ptr, "Invalid filter method in IHDR"); |
---|
232 | } |
---|
233 | #else |
---|
234 | if(filter_type != PNG_FILTER_TYPE_BASE) |
---|
235 | png_error(png_ptr, "Unknown filter method in IHDR"); |
---|
236 | #endif |
---|
237 | |
---|
238 | info_ptr->width = width; |
---|
239 | info_ptr->height = height; |
---|
240 | info_ptr->bit_depth = (png_byte)bit_depth; |
---|
241 | info_ptr->color_type =(png_byte) color_type; |
---|
242 | info_ptr->compression_type = (png_byte)compression_type; |
---|
243 | info_ptr->filter_type = (png_byte)filter_type; |
---|
244 | info_ptr->interlace_type = (png_byte)interlace_type; |
---|
245 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
---|
246 | info_ptr->channels = 1; |
---|
247 | else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) |
---|
248 | info_ptr->channels = 3; |
---|
249 | else |
---|
250 | info_ptr->channels = 1; |
---|
251 | if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) |
---|
252 | info_ptr->channels++; |
---|
253 | info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); |
---|
254 | |
---|
255 | /* check for overflow */ |
---|
256 | rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3; |
---|
257 | if (( width > PNG_MAX_UINT/rowbytes_per_pixel)) |
---|
258 | { |
---|
259 | png_warning(png_ptr, |
---|
260 | "Width too large to process image data; rowbytes will overflow."); |
---|
261 | info_ptr->rowbytes = (png_size_t)0; |
---|
262 | } |
---|
263 | else |
---|
264 | info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3; |
---|
265 | } |
---|
266 | |
---|
267 | #if defined(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\n", "oFFs"); |
---|
273 | if (png_ptr == NULL || info_ptr == NULL) |
---|
274 | return; |
---|
275 | |
---|
276 | info_ptr->x_offset = offset_x; |
---|
277 | info_ptr->y_offset = offset_y; |
---|
278 | info_ptr->offset_unit_type = (png_byte)unit_type; |
---|
279 | info_ptr->valid |= PNG_INFO_oFFs; |
---|
280 | } |
---|
281 | #endif |
---|
282 | |
---|
283 | #if defined(PNG_pCAL_SUPPORTED) |
---|
284 | void PNGAPI |
---|
285 | png_set_pCAL(png_structp png_ptr, png_infop info_ptr, |
---|
286 | png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, |
---|
287 | png_charp units, png_charpp params) |
---|
288 | { |
---|
289 | png_uint_32 length; |
---|
290 | int i; |
---|
291 | |
---|
292 | png_debug1(1, "in %s storage function\n", "pCAL"); |
---|
293 | if (png_ptr == NULL || info_ptr == NULL) |
---|
294 | return; |
---|
295 | |
---|
296 | length = png_strlen(purpose) + 1; |
---|
297 | png_debug1(3, "allocating purpose for info (%lu bytes)\n", length); |
---|
298 | info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length); |
---|
299 | png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); |
---|
300 | |
---|
301 | png_debug(3, "storing X0, X1, type, and nparams in info\n"); |
---|
302 | info_ptr->pcal_X0 = X0; |
---|
303 | info_ptr->pcal_X1 = X1; |
---|
304 | info_ptr->pcal_type = (png_byte)type; |
---|
305 | info_ptr->pcal_nparams = (png_byte)nparams; |
---|
306 | |
---|
307 | length = png_strlen(units) + 1; |
---|
308 | png_debug1(3, "allocating units for info (%lu bytes)\n", length); |
---|
309 | info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length); |
---|
310 | png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); |
---|
311 | |
---|
312 | info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr, |
---|
313 | (png_uint_32)((nparams + 1) * sizeof(png_charp))); |
---|
314 | |
---|
315 | info_ptr->pcal_params[nparams] = NULL; |
---|
316 | |
---|
317 | for (i = 0; i < nparams; i++) |
---|
318 | { |
---|
319 | length = png_strlen(params[i]) + 1; |
---|
320 | png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length); |
---|
321 | info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length); |
---|
322 | png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); |
---|
323 | } |
---|
324 | |
---|
325 | info_ptr->valid |= PNG_INFO_pCAL; |
---|
326 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
327 | info_ptr->free_me |= PNG_FREE_PCAL; |
---|
328 | #endif |
---|
329 | } |
---|
330 | #endif |
---|
331 | |
---|
332 | #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) |
---|
333 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
334 | void PNGAPI |
---|
335 | png_set_sCAL(png_structp png_ptr, png_infop info_ptr, |
---|
336 | int unit, double width, double height) |
---|
337 | { |
---|
338 | png_debug1(1, "in %s storage function\n", "sCAL"); |
---|
339 | if (png_ptr == NULL || info_ptr == NULL) |
---|
340 | return; |
---|
341 | |
---|
342 | info_ptr->scal_unit = (png_byte)unit; |
---|
343 | info_ptr->scal_pixel_width = width; |
---|
344 | info_ptr->scal_pixel_height = height; |
---|
345 | |
---|
346 | info_ptr->valid |= PNG_INFO_sCAL; |
---|
347 | } |
---|
348 | #else |
---|
349 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
350 | void PNGAPI |
---|
351 | png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, |
---|
352 | int unit, png_charp swidth, png_charp sheight) |
---|
353 | { |
---|
354 | png_uint_32 length; |
---|
355 | |
---|
356 | png_debug1(1, "in %s storage function\n", "sCAL"); |
---|
357 | if (png_ptr == NULL || info_ptr == NULL) |
---|
358 | return; |
---|
359 | |
---|
360 | info_ptr->scal_unit = (png_byte)unit; |
---|
361 | |
---|
362 | length = png_strlen(swidth) + 1; |
---|
363 | png_debug1(3, "allocating unit for info (%d bytes)\n", length); |
---|
364 | info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length); |
---|
365 | png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length); |
---|
366 | |
---|
367 | length = png_strlen(sheight) + 1; |
---|
368 | png_debug1(3, "allocating unit for info (%d bytes)\n", length); |
---|
369 | info_ptr->scal_s_height = (png_charp)png_malloc(png_ptr, length); |
---|
370 | png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length); |
---|
371 | |
---|
372 | info_ptr->valid |= PNG_INFO_sCAL; |
---|
373 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
374 | info_ptr->free_me |= PNG_FREE_SCAL; |
---|
375 | #endif |
---|
376 | } |
---|
377 | #endif |
---|
378 | #endif |
---|
379 | #endif |
---|
380 | |
---|
381 | #if defined(PNG_pHYs_SUPPORTED) |
---|
382 | void PNGAPI |
---|
383 | png_set_pHYs(png_structp png_ptr, png_infop info_ptr, |
---|
384 | png_uint_32 res_x, png_uint_32 res_y, int unit_type) |
---|
385 | { |
---|
386 | png_debug1(1, "in %s storage function\n", "pHYs"); |
---|
387 | if (png_ptr == NULL || info_ptr == NULL) |
---|
388 | return; |
---|
389 | |
---|
390 | info_ptr->x_pixels_per_unit = res_x; |
---|
391 | info_ptr->y_pixels_per_unit = res_y; |
---|
392 | info_ptr->phys_unit_type = (png_byte)unit_type; |
---|
393 | info_ptr->valid |= PNG_INFO_pHYs; |
---|
394 | } |
---|
395 | #endif |
---|
396 | |
---|
397 | void PNGAPI |
---|
398 | png_set_PLTE(png_structp png_ptr, png_infop info_ptr, |
---|
399 | png_colorp palette, int num_palette) |
---|
400 | { |
---|
401 | |
---|
402 | png_debug1(1, "in %s storage function\n", "PLTE"); |
---|
403 | if (png_ptr == NULL || info_ptr == NULL) |
---|
404 | return; |
---|
405 | |
---|
406 | /* |
---|
407 | * It may not actually be necessary to set png_ptr->palette here; |
---|
408 | * we do it for backward compatibility with the way the png_handle_tRNS |
---|
409 | * function used to do the allocation. |
---|
410 | */ |
---|
411 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
412 | png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); |
---|
413 | #endif |
---|
414 | /* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries, |
---|
415 | in case of an invalid PNG file that has too-large sample values. */ |
---|
416 | png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)256, |
---|
417 | sizeof (png_color)); |
---|
418 | png_memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color)); |
---|
419 | info_ptr->palette = png_ptr->palette; |
---|
420 | info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; |
---|
421 | |
---|
422 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
423 | info_ptr->free_me |= PNG_FREE_PLTE; |
---|
424 | #else |
---|
425 | png_ptr->flags |= PNG_FLAG_FREE_PLTE; |
---|
426 | #endif |
---|
427 | |
---|
428 | info_ptr->valid |= PNG_INFO_PLTE; |
---|
429 | } |
---|
430 | |
---|
431 | #if defined(PNG_sBIT_SUPPORTED) |
---|
432 | void PNGAPI |
---|
433 | png_set_sBIT(png_structp png_ptr, png_infop info_ptr, |
---|
434 | png_color_8p sig_bit) |
---|
435 | { |
---|
436 | png_debug1(1, "in %s storage function\n", "sBIT"); |
---|
437 | if (png_ptr == NULL || info_ptr == NULL) |
---|
438 | return; |
---|
439 | |
---|
440 | png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8)); |
---|
441 | info_ptr->valid |= PNG_INFO_sBIT; |
---|
442 | } |
---|
443 | #endif |
---|
444 | |
---|
445 | #if defined(PNG_sRGB_SUPPORTED) |
---|
446 | void PNGAPI |
---|
447 | png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) |
---|
448 | { |
---|
449 | png_debug1(1, "in %s storage function\n", "sRGB"); |
---|
450 | if (png_ptr == NULL || info_ptr == NULL) |
---|
451 | return; |
---|
452 | |
---|
453 | info_ptr->srgb_intent = (png_byte)intent; |
---|
454 | info_ptr->valid |= PNG_INFO_sRGB; |
---|
455 | } |
---|
456 | |
---|
457 | void PNGAPI |
---|
458 | png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, |
---|
459 | int intent) |
---|
460 | { |
---|
461 | #if defined(PNG_gAMA_SUPPORTED) |
---|
462 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
463 | float file_gamma; |
---|
464 | #endif |
---|
465 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
466 | png_fixed_point int_file_gamma; |
---|
467 | #endif |
---|
468 | #endif |
---|
469 | #if defined(PNG_cHRM_SUPPORTED) |
---|
470 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
471 | float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; |
---|
472 | #endif |
---|
473 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
474 | png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, |
---|
475 | int_green_y, int_blue_x, int_blue_y; |
---|
476 | #endif |
---|
477 | #endif |
---|
478 | png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM"); |
---|
479 | if (png_ptr == NULL || info_ptr == NULL) |
---|
480 | return; |
---|
481 | |
---|
482 | png_set_sRGB(png_ptr, info_ptr, intent); |
---|
483 | |
---|
484 | #if defined(PNG_gAMA_SUPPORTED) |
---|
485 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
486 | file_gamma = (float).45455; |
---|
487 | png_set_gAMA(png_ptr, info_ptr, file_gamma); |
---|
488 | #endif |
---|
489 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
490 | int_file_gamma = 45455L; |
---|
491 | png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); |
---|
492 | #endif |
---|
493 | #endif |
---|
494 | |
---|
495 | #if defined(PNG_cHRM_SUPPORTED) |
---|
496 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
497 | int_white_x = 31270L; |
---|
498 | int_white_y = 32900L; |
---|
499 | int_red_x = 64000L; |
---|
500 | int_red_y = 33000L; |
---|
501 | int_green_x = 30000L; |
---|
502 | int_green_y = 60000L; |
---|
503 | int_blue_x = 15000L; |
---|
504 | int_blue_y = 6000L; |
---|
505 | |
---|
506 | png_set_cHRM_fixed(png_ptr, info_ptr, |
---|
507 | int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y, |
---|
508 | int_blue_x, int_blue_y); |
---|
509 | #endif |
---|
510 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
511 | white_x = (float).3127; |
---|
512 | white_y = (float).3290; |
---|
513 | red_x = (float).64; |
---|
514 | red_y = (float).33; |
---|
515 | green_x = (float).30; |
---|
516 | green_y = (float).60; |
---|
517 | blue_x = (float).15; |
---|
518 | blue_y = (float).06; |
---|
519 | |
---|
520 | png_set_cHRM(png_ptr, info_ptr, |
---|
521 | white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); |
---|
522 | #endif |
---|
523 | #endif |
---|
524 | } |
---|
525 | #endif |
---|
526 | |
---|
527 | |
---|
528 | #if defined(PNG_iCCP_SUPPORTED) |
---|
529 | void PNGAPI |
---|
530 | png_set_iCCP(png_structp png_ptr, png_infop info_ptr, |
---|
531 | png_charp name, int compression_type, |
---|
532 | png_charp profile, png_uint_32 proflen) |
---|
533 | { |
---|
534 | png_charp new_iccp_name; |
---|
535 | png_charp new_iccp_profile; |
---|
536 | |
---|
537 | png_debug1(1, "in %s storage function\n", "iCCP"); |
---|
538 | if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) |
---|
539 | return; |
---|
540 | |
---|
541 | new_iccp_name = (png_charp)png_malloc(png_ptr, png_strlen(name)+1); |
---|
542 | png_strcpy(new_iccp_name, name); |
---|
543 | new_iccp_profile = (png_charp)png_malloc(png_ptr, proflen); |
---|
544 | png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); |
---|
545 | |
---|
546 | png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); |
---|
547 | |
---|
548 | info_ptr->iccp_proflen = proflen; |
---|
549 | info_ptr->iccp_name = new_iccp_name; |
---|
550 | info_ptr->iccp_profile = new_iccp_profile; |
---|
551 | /* Compression is always zero but is here so the API and info structure |
---|
552 | * does not have to change if we introduce multiple compression types */ |
---|
553 | info_ptr->iccp_compression = (png_byte)compression_type; |
---|
554 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
555 | info_ptr->free_me |= PNG_FREE_ICCP; |
---|
556 | #endif |
---|
557 | info_ptr->valid |= PNG_INFO_iCCP; |
---|
558 | } |
---|
559 | #endif |
---|
560 | |
---|
561 | #if defined(PNG_TEXT_SUPPORTED) |
---|
562 | void PNGAPI |
---|
563 | png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, |
---|
564 | int num_text) |
---|
565 | { |
---|
566 | int i; |
---|
567 | |
---|
568 | png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ? |
---|
569 | "text" : (png_const_charp)png_ptr->chunk_name)); |
---|
570 | |
---|
571 | if (png_ptr == NULL || info_ptr == NULL || num_text == 0) |
---|
572 | return; |
---|
573 | |
---|
574 | /* Make sure we have enough space in the "text" array in info_struct |
---|
575 | * to hold all of the incoming text_ptr objects. |
---|
576 | */ |
---|
577 | if (info_ptr->num_text + num_text > info_ptr->max_text) |
---|
578 | { |
---|
579 | if (info_ptr->text != NULL) |
---|
580 | { |
---|
581 | png_textp old_text; |
---|
582 | int old_max; |
---|
583 | |
---|
584 | old_max = info_ptr->max_text; |
---|
585 | info_ptr->max_text = info_ptr->num_text + num_text + 8; |
---|
586 | old_text = info_ptr->text; |
---|
587 | info_ptr->text = (png_textp)png_malloc(png_ptr, |
---|
588 | (png_uint_32)(info_ptr->max_text * sizeof (png_text))); |
---|
589 | png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * |
---|
590 | sizeof(png_text))); |
---|
591 | png_free(png_ptr, old_text); |
---|
592 | } |
---|
593 | else |
---|
594 | { |
---|
595 | info_ptr->max_text = num_text + 8; |
---|
596 | info_ptr->num_text = 0; |
---|
597 | info_ptr->text = (png_textp)png_malloc(png_ptr, |
---|
598 | (png_uint_32)(info_ptr->max_text * sizeof (png_text))); |
---|
599 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
600 | info_ptr->free_me |= PNG_FREE_TEXT; |
---|
601 | #endif |
---|
602 | } |
---|
603 | png_debug1(3, "allocated %d entries for info_ptr->text\n", |
---|
604 | info_ptr->max_text); |
---|
605 | } |
---|
606 | for (i = 0; i < num_text; i++) |
---|
607 | { |
---|
608 | png_size_t text_length,key_len; |
---|
609 | png_size_t lang_len,lang_key_len; |
---|
610 | png_textp textp = &(info_ptr->text[info_ptr->num_text]); |
---|
611 | |
---|
612 | if (text_ptr[i].key == NULL) |
---|
613 | continue; |
---|
614 | |
---|
615 | key_len = png_strlen(text_ptr[i].key); |
---|
616 | |
---|
617 | if(text_ptr[i].compression <= 0) |
---|
618 | { |
---|
619 | lang_len = 0; |
---|
620 | lang_key_len = 0; |
---|
621 | } |
---|
622 | else |
---|
623 | #ifdef PNG_iTXt_SUPPORTED |
---|
624 | { |
---|
625 | /* set iTXt data */ |
---|
626 | if (text_ptr[i].key != NULL) |
---|
627 | lang_len = png_strlen(text_ptr[i].lang); |
---|
628 | else |
---|
629 | lang_len = 0; |
---|
630 | if (text_ptr[i].lang_key != NULL) |
---|
631 | lang_key_len = png_strlen(text_ptr[i].lang_key); |
---|
632 | else |
---|
633 | lang_key_len = 0; |
---|
634 | } |
---|
635 | #else |
---|
636 | { |
---|
637 | png_warning(png_ptr, "iTXt chunk not supported."); |
---|
638 | continue; |
---|
639 | } |
---|
640 | #endif |
---|
641 | |
---|
642 | if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') |
---|
643 | { |
---|
644 | text_length = 0; |
---|
645 | #ifdef PNG_iTXt_SUPPORTED |
---|
646 | if(text_ptr[i].compression > 0) |
---|
647 | textp->compression = PNG_ITXT_COMPRESSION_NONE; |
---|
648 | else |
---|
649 | #endif |
---|
650 | textp->compression = PNG_TEXT_COMPRESSION_NONE; |
---|
651 | } |
---|
652 | else |
---|
653 | { |
---|
654 | text_length = png_strlen(text_ptr[i].text); |
---|
655 | textp->compression = text_ptr[i].compression; |
---|
656 | } |
---|
657 | |
---|
658 | textp->key = (png_charp)png_malloc(png_ptr, |
---|
659 | (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4)); |
---|
660 | png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n", |
---|
661 | (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4), |
---|
662 | (int)textp->key); |
---|
663 | |
---|
664 | png_memcpy(textp->key, text_ptr[i].key, |
---|
665 | (png_size_t)(key_len)); |
---|
666 | *(textp->key+key_len) = '\0'; |
---|
667 | #ifdef PNG_iTXt_SUPPORTED |
---|
668 | if (text_ptr[i].compression > 0) |
---|
669 | { |
---|
670 | textp->lang=textp->key + key_len + 1; |
---|
671 | png_memcpy(textp->lang, text_ptr[i].lang, lang_len); |
---|
672 | *(textp->lang+lang_len) = '\0'; |
---|
673 | textp->lang_key=textp->lang + lang_len + 1; |
---|
674 | png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); |
---|
675 | *(textp->lang_key+lang_key_len) = '\0'; |
---|
676 | textp->text=textp->lang_key + lang_key_len + 1; |
---|
677 | } |
---|
678 | else |
---|
679 | #endif |
---|
680 | { |
---|
681 | #ifdef PNG_iTXt_SUPPORTED |
---|
682 | textp->lang=NULL; |
---|
683 | textp->lang_key=NULL; |
---|
684 | #endif |
---|
685 | textp->text=textp->key + key_len + 1; |
---|
686 | } |
---|
687 | if(text_length) |
---|
688 | png_memcpy(textp->text, text_ptr[i].text, |
---|
689 | (png_size_t)(text_length)); |
---|
690 | *(textp->text+text_length) = '\0'; |
---|
691 | |
---|
692 | #ifdef PNG_iTXt_SUPPORTED |
---|
693 | if(textp->compression > 0) |
---|
694 | { |
---|
695 | textp->text_length = 0; |
---|
696 | textp->itxt_length = text_length; |
---|
697 | } |
---|
698 | else |
---|
699 | #endif |
---|
700 | { |
---|
701 | textp->text_length = text_length; |
---|
702 | #ifdef PNG_iTXt_SUPPORTED |
---|
703 | textp->itxt_length = 0; |
---|
704 | #endif |
---|
705 | } |
---|
706 | info_ptr->text[info_ptr->num_text]= *textp; |
---|
707 | info_ptr->num_text++; |
---|
708 | png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); |
---|
709 | } |
---|
710 | } |
---|
711 | #endif |
---|
712 | |
---|
713 | #if defined(PNG_tIME_SUPPORTED) |
---|
714 | void PNGAPI |
---|
715 | png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) |
---|
716 | { |
---|
717 | png_debug1(1, "in %s storage function\n", "tIME"); |
---|
718 | if (png_ptr == NULL || info_ptr == NULL || |
---|
719 | (png_ptr->mode & PNG_WROTE_tIME)) |
---|
720 | return; |
---|
721 | |
---|
722 | png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time)); |
---|
723 | info_ptr->valid |= PNG_INFO_tIME; |
---|
724 | } |
---|
725 | #endif |
---|
726 | |
---|
727 | #if defined(PNG_tRNS_SUPPORTED) |
---|
728 | void PNGAPI |
---|
729 | png_set_tRNS(png_structp png_ptr, png_infop info_ptr, |
---|
730 | png_bytep trans, int num_trans, png_color_16p trans_values) |
---|
731 | { |
---|
732 | png_debug1(1, "in %s storage function\n", "tRNS"); |
---|
733 | if (png_ptr == NULL || info_ptr == NULL) |
---|
734 | return; |
---|
735 | |
---|
736 | if (trans != NULL) |
---|
737 | { |
---|
738 | /* |
---|
739 | * It may not actually be necessary to set png_ptr->trans here; |
---|
740 | * we do it for backward compatibility with the way the png_handle_tRNS |
---|
741 | * function used to do the allocation. |
---|
742 | */ |
---|
743 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
744 | png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); |
---|
745 | #endif |
---|
746 | /* Changed from num_trans to 256 in version 1.2.1 */ |
---|
747 | png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr, |
---|
748 | (png_uint_32)256); |
---|
749 | png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans); |
---|
750 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
751 | info_ptr->free_me |= PNG_FREE_TRNS; |
---|
752 | #else |
---|
753 | png_ptr->flags |= PNG_FLAG_FREE_TRNS; |
---|
754 | #endif |
---|
755 | } |
---|
756 | |
---|
757 | if (trans_values != NULL) |
---|
758 | { |
---|
759 | png_memcpy(&(info_ptr->trans_values), trans_values, |
---|
760 | sizeof(png_color_16)); |
---|
761 | if (num_trans == 0) |
---|
762 | num_trans = 1; |
---|
763 | } |
---|
764 | info_ptr->num_trans = (png_uint_16)num_trans; |
---|
765 | info_ptr->valid |= PNG_INFO_tRNS; |
---|
766 | } |
---|
767 | #endif |
---|
768 | |
---|
769 | #if defined(PNG_sPLT_SUPPORTED) |
---|
770 | void PNGAPI |
---|
771 | png_set_sPLT(png_structp png_ptr, |
---|
772 | png_infop info_ptr, png_sPLT_tp entries, int nentries) |
---|
773 | { |
---|
774 | png_sPLT_tp np; |
---|
775 | int i; |
---|
776 | |
---|
777 | np = (png_sPLT_tp)png_malloc(png_ptr, |
---|
778 | (info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t)); |
---|
779 | |
---|
780 | png_memcpy(np, info_ptr->splt_palettes, |
---|
781 | info_ptr->splt_palettes_num * sizeof(png_sPLT_t)); |
---|
782 | png_free(png_ptr, info_ptr->splt_palettes); |
---|
783 | info_ptr->splt_palettes=NULL; |
---|
784 | |
---|
785 | for (i = 0; i < nentries; i++) |
---|
786 | { |
---|
787 | png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; |
---|
788 | png_sPLT_tp from = entries + i; |
---|
789 | |
---|
790 | to->name = (png_charp)png_malloc(png_ptr, |
---|
791 | png_strlen(from->name) + 1); |
---|
792 | png_strcpy(to->name, from->name); |
---|
793 | to->entries = (png_sPLT_entryp)png_malloc(png_ptr, |
---|
794 | from->nentries * sizeof(png_sPLT_t)); |
---|
795 | png_memcpy(to->entries, from->entries, |
---|
796 | from->nentries * sizeof(png_sPLT_t)); |
---|
797 | to->nentries = from->nentries; |
---|
798 | to->depth = from->depth; |
---|
799 | } |
---|
800 | |
---|
801 | info_ptr->splt_palettes = np; |
---|
802 | info_ptr->splt_palettes_num += nentries; |
---|
803 | info_ptr->valid |= PNG_INFO_sPLT; |
---|
804 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
805 | info_ptr->free_me |= PNG_FREE_SPLT; |
---|
806 | #endif |
---|
807 | } |
---|
808 | #endif /* PNG_sPLT_SUPPORTED */ |
---|
809 | |
---|
810 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
---|
811 | void PNGAPI |
---|
812 | png_set_unknown_chunks(png_structp png_ptr, |
---|
813 | png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) |
---|
814 | { |
---|
815 | png_unknown_chunkp np; |
---|
816 | int i; |
---|
817 | |
---|
818 | if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) |
---|
819 | return; |
---|
820 | |
---|
821 | np = (png_unknown_chunkp)png_malloc(png_ptr, |
---|
822 | (info_ptr->unknown_chunks_num + num_unknowns) * |
---|
823 | sizeof(png_unknown_chunk)); |
---|
824 | |
---|
825 | png_memcpy(np, info_ptr->unknown_chunks, |
---|
826 | info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk)); |
---|
827 | png_free(png_ptr, info_ptr->unknown_chunks); |
---|
828 | info_ptr->unknown_chunks=NULL; |
---|
829 | |
---|
830 | for (i = 0; i < num_unknowns; i++) |
---|
831 | { |
---|
832 | png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; |
---|
833 | png_unknown_chunkp from = unknowns + i; |
---|
834 | |
---|
835 | png_strcpy((png_charp)to->name, (png_charp)from->name); |
---|
836 | to->data = (png_bytep)png_malloc(png_ptr, from->size); |
---|
837 | png_memcpy(to->data, from->data, from->size); |
---|
838 | to->size = from->size; |
---|
839 | |
---|
840 | /* note our location in the read or write sequence */ |
---|
841 | to->location = (png_byte)(png_ptr->mode & 0xff); |
---|
842 | } |
---|
843 | |
---|
844 | info_ptr->unknown_chunks = np; |
---|
845 | info_ptr->unknown_chunks_num += num_unknowns; |
---|
846 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
847 | info_ptr->free_me |= PNG_FREE_UNKN; |
---|
848 | #endif |
---|
849 | } |
---|
850 | void PNGAPI |
---|
851 | png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, |
---|
852 | int chunk, int location) |
---|
853 | { |
---|
854 | if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < |
---|
855 | (int)info_ptr->unknown_chunks_num) |
---|
856 | info_ptr->unknown_chunks[chunk].location = (png_byte)location; |
---|
857 | } |
---|
858 | #endif |
---|
859 | |
---|
860 | #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ |
---|
861 | defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) |
---|
862 | void PNGAPI |
---|
863 | png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) |
---|
864 | { |
---|
865 | /* This function is deprecated in favor of png_permit_mng_features() |
---|
866 | and will be removed from libpng-2.0.0 */ |
---|
867 | png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n"); |
---|
868 | if (png_ptr == NULL) |
---|
869 | return; |
---|
870 | png_ptr->mng_features_permitted = (png_byte) |
---|
871 | ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) | |
---|
872 | ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE))); |
---|
873 | } |
---|
874 | #endif |
---|
875 | |
---|
876 | #if defined(PNG_MNG_FEATURES_SUPPORTED) |
---|
877 | png_uint_32 PNGAPI |
---|
878 | png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) |
---|
879 | { |
---|
880 | png_debug(1, "in png_permit_mng_features\n"); |
---|
881 | if (png_ptr == NULL) |
---|
882 | return (png_uint_32)0; |
---|
883 | png_ptr->mng_features_permitted = |
---|
884 | (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); |
---|
885 | return (png_uint_32)png_ptr->mng_features_permitted; |
---|
886 | } |
---|
887 | #endif |
---|
888 | |
---|
889 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
---|
890 | void PNGAPI |
---|
891 | png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep |
---|
892 | chunk_list, int num_chunks) |
---|
893 | { |
---|
894 | png_bytep new_list, p; |
---|
895 | int i, old_num_chunks; |
---|
896 | if (num_chunks == 0) |
---|
897 | { |
---|
898 | if(keep == HANDLE_CHUNK_ALWAYS || keep == HANDLE_CHUNK_IF_SAFE) |
---|
899 | png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; |
---|
900 | else |
---|
901 | png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; |
---|
902 | |
---|
903 | if(keep == HANDLE_CHUNK_ALWAYS) |
---|
904 | png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; |
---|
905 | else |
---|
906 | png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; |
---|
907 | return; |
---|
908 | } |
---|
909 | if (chunk_list == NULL) |
---|
910 | return; |
---|
911 | old_num_chunks=png_ptr->num_chunk_list; |
---|
912 | new_list=(png_bytep)png_malloc(png_ptr, |
---|
913 | (png_uint_32)(5*(num_chunks+old_num_chunks))); |
---|
914 | if(png_ptr->chunk_list != NULL) |
---|
915 | { |
---|
916 | png_memcpy(new_list, png_ptr->chunk_list, |
---|
917 | (png_size_t)(5*old_num_chunks)); |
---|
918 | png_free(png_ptr, png_ptr->chunk_list); |
---|
919 | png_ptr->chunk_list=NULL; |
---|
920 | } |
---|
921 | png_memcpy(new_list+5*old_num_chunks, chunk_list, |
---|
922 | (png_size_t)(5*num_chunks)); |
---|
923 | for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5) |
---|
924 | *p=(png_byte)keep; |
---|
925 | png_ptr->num_chunk_list=old_num_chunks+num_chunks; |
---|
926 | png_ptr->chunk_list=new_list; |
---|
927 | #ifdef PNG_FREE_ME_SUPPORTED |
---|
928 | png_ptr->free_me |= PNG_FREE_LIST; |
---|
929 | #endif |
---|
930 | } |
---|
931 | #endif |
---|
932 | |
---|
933 | #if defined(PNG_READ_USER_CHUNKS_SUPPORTED) |
---|
934 | void PNGAPI |
---|
935 | png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, |
---|
936 | png_user_chunk_ptr read_user_chunk_fn) |
---|
937 | { |
---|
938 | png_debug(1, "in png_set_read_user_chunk_fn\n"); |
---|
939 | png_ptr->read_user_chunk_fn = read_user_chunk_fn; |
---|
940 | png_ptr->user_chunk_ptr = user_chunk_ptr; |
---|
941 | } |
---|
942 | #endif |
---|
943 | |
---|
944 | #if defined(PNG_INFO_IMAGE_SUPPORTED) |
---|
945 | void PNGAPI |
---|
946 | png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) |
---|
947 | { |
---|
948 | png_debug1(1, "in %s storage function\n", "rows"); |
---|
949 | |
---|
950 | if (png_ptr == NULL || info_ptr == NULL) |
---|
951 | return; |
---|
952 | |
---|
953 | if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) |
---|
954 | png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); |
---|
955 | info_ptr->row_pointers = row_pointers; |
---|
956 | if(row_pointers) |
---|
957 | info_ptr->valid |= PNG_INFO_IDAT; |
---|
958 | } |
---|
959 | #endif |
---|
960 | |
---|
961 | void PNGAPI |
---|
962 | png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size) |
---|
963 | { |
---|
964 | if(png_ptr->zbuf) |
---|
965 | png_free(png_ptr, png_ptr->zbuf); |
---|
966 | png_ptr->zbuf_size = (png_size_t)size; |
---|
967 | png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); |
---|
968 | png_ptr->zstream.next_out = png_ptr->zbuf; |
---|
969 | png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; |
---|
970 | } |
---|
971 | |
---|
972 | void PNGAPI |
---|
973 | png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) |
---|
974 | { |
---|
975 | if (png_ptr && info_ptr) |
---|
976 | info_ptr->valid &= ~(mask); |
---|
977 | } |
---|
978 | |
---|
979 | |
---|
980 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
---|
981 | /* this function was added to libpng 1.2.0 and should always exist by default */ |
---|
982 | void PNGAPI |
---|
983 | png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags) |
---|
984 | { |
---|
985 | png_uint_32 settable_asm_flags; |
---|
986 | png_uint_32 settable_mmx_flags; |
---|
987 | |
---|
988 | settable_mmx_flags = |
---|
989 | #ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW |
---|
990 | PNG_ASM_FLAG_MMX_READ_COMBINE_ROW | |
---|
991 | #endif |
---|
992 | #ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE |
---|
993 | PNG_ASM_FLAG_MMX_READ_INTERLACE | |
---|
994 | #endif |
---|
995 | #ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW |
---|
996 | PNG_ASM_FLAG_MMX_READ_FILTER_SUB | |
---|
997 | PNG_ASM_FLAG_MMX_READ_FILTER_UP | |
---|
998 | PNG_ASM_FLAG_MMX_READ_FILTER_AVG | |
---|
999 | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH | |
---|
1000 | #endif |
---|
1001 | 0; |
---|
1002 | |
---|
1003 | /* could be some non-MMX ones in the future, but not currently: */ |
---|
1004 | settable_asm_flags = settable_mmx_flags; |
---|
1005 | |
---|
1006 | if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) || |
---|
1007 | !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU)) |
---|
1008 | { |
---|
1009 | /* clear all MMX flags if MMX isn't supported */ |
---|
1010 | settable_asm_flags &= ~settable_mmx_flags; |
---|
1011 | png_ptr->asm_flags &= ~settable_mmx_flags; |
---|
1012 | } |
---|
1013 | |
---|
1014 | /* we're replacing the settable bits with those passed in by the user, |
---|
1015 | * so first zero them out of the master copy, then logical-OR in the |
---|
1016 | * allowed subset that was requested */ |
---|
1017 | |
---|
1018 | png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */ |
---|
1019 | png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */ |
---|
1020 | } |
---|
1021 | #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ |
---|
1022 | |
---|
1023 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
---|
1024 | /* this function was added to libpng 1.2.0 */ |
---|
1025 | void PNGAPI |
---|
1026 | png_set_mmx_thresholds (png_structp png_ptr, |
---|
1027 | png_byte mmx_bitdepth_threshold, |
---|
1028 | png_uint_32 mmx_rowbytes_threshold) |
---|
1029 | { |
---|
1030 | png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold; |
---|
1031 | png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold; |
---|
1032 | } |
---|
1033 | #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ |
---|