2 /* pngset.c - storage of image information into info struct
4 * libpng 1.2.8 - December 3, 2004
5 * For conditions of distribution and use, see copyright notice in png.h
6 * Copyright (c) 1998-2004 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.)
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.
19 #if defined(PNG_bKGD_SUPPORTED)
21 png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
23 png_debug1(1, "in %s storage function\n", "bKGD");
24 if (png_ptr == NULL || info_ptr == NULL)
27 png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
28 info_ptr->valid |= PNG_INFO_bKGD;
32 #if defined(PNG_cHRM_SUPPORTED)
33 #ifdef PNG_FLOATING_POINT_SUPPORTED
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)
39 png_debug1(1, "in %s storage function\n", "cHRM");
40 if (png_ptr == NULL || info_ptr == NULL)
43 if (white_x < 0.0 || white_y < 0.0 ||
44 red_x < 0.0 || red_y < 0.0 ||
45 green_x < 0.0 || green_y < 0.0 ||
46 blue_x < 0.0 || blue_y < 0.0)
49 "Ignoring attempt to set negative chromaticity value");
52 if (white_x > 21474.83 || white_y > 21474.83 ||
53 red_x > 21474.83 || red_y > 21474.83 ||
54 green_x > 21474.83 || green_y > 21474.83 ||
55 blue_x > 21474.83 || blue_y > 21474.83)
58 "Ignoring attempt to set chromaticity value exceeding 21474.83");
62 info_ptr->x_white = (float)white_x;
63 info_ptr->y_white = (float)white_y;
64 info_ptr->x_red = (float)red_x;
65 info_ptr->y_red = (float)red_y;
66 info_ptr->x_green = (float)green_x;
67 info_ptr->y_green = (float)green_y;
68 info_ptr->x_blue = (float)blue_x;
69 info_ptr->y_blue = (float)blue_y;
70 #ifdef PNG_FIXED_POINT_SUPPORTED
71 info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
72 info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
73 info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
74 info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
75 info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
76 info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
77 info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
78 info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
80 info_ptr->valid |= PNG_INFO_cHRM;
83 #ifdef PNG_FIXED_POINT_SUPPORTED
85 png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
86 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
87 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
88 png_fixed_point blue_x, png_fixed_point blue_y)
90 png_debug1(1, "in %s storage function\n", "cHRM");
91 if (png_ptr == NULL || info_ptr == NULL)
94 if (white_x < 0 || white_y < 0 ||
95 red_x < 0 || red_y < 0 ||
96 green_x < 0 || green_y < 0 ||
97 blue_x < 0 || blue_y < 0)
100 "Ignoring attempt to set negative chromaticity value");
103 if (white_x > (double) PNG_UINT_31_MAX ||
104 white_y > (double) PNG_UINT_31_MAX ||
105 red_x > (double) PNG_UINT_31_MAX ||
106 red_y > (double) PNG_UINT_31_MAX ||
107 green_x > (double) PNG_UINT_31_MAX ||
108 green_y > (double) PNG_UINT_31_MAX ||
109 blue_x > (double) PNG_UINT_31_MAX ||
110 blue_y > (double) PNG_UINT_31_MAX)
113 "Ignoring attempt to set chromaticity value exceeding 21474.83");
116 info_ptr->int_x_white = white_x;
117 info_ptr->int_y_white = white_y;
118 info_ptr->int_x_red = red_x;
119 info_ptr->int_y_red = red_y;
120 info_ptr->int_x_green = green_x;
121 info_ptr->int_y_green = green_y;
122 info_ptr->int_x_blue = blue_x;
123 info_ptr->int_y_blue = blue_y;
124 #ifdef PNG_FLOATING_POINT_SUPPORTED
125 info_ptr->x_white = (float)(white_x/100000.);
126 info_ptr->y_white = (float)(white_y/100000.);
127 info_ptr->x_red = (float)( red_x/100000.);
128 info_ptr->y_red = (float)( red_y/100000.);
129 info_ptr->x_green = (float)(green_x/100000.);
130 info_ptr->y_green = (float)(green_y/100000.);
131 info_ptr->x_blue = (float)( blue_x/100000.);
132 info_ptr->y_blue = (float)( blue_y/100000.);
134 info_ptr->valid |= PNG_INFO_cHRM;
139 #if defined(PNG_gAMA_SUPPORTED)
140 #ifdef PNG_FLOATING_POINT_SUPPORTED
142 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
145 png_debug1(1, "in %s storage function\n", "gAMA");
146 if (png_ptr == NULL || info_ptr == NULL)
149 /* Check for overflow */
150 if (file_gamma > 21474.83)
152 png_warning(png_ptr, "Limiting gamma to 21474.83");
157 info_ptr->gamma = (float)gamma;
158 #ifdef PNG_FIXED_POINT_SUPPORTED
159 info_ptr->int_gamma = (int)(gamma*100000.+.5);
161 info_ptr->valid |= PNG_INFO_gAMA;
163 png_warning(png_ptr, "Setting gamma=0");
167 png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
170 png_fixed_point gamma;
172 png_debug1(1, "in %s storage function\n", "gAMA");
173 if (png_ptr == NULL || info_ptr == NULL)
176 if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
178 png_warning(png_ptr, "Limiting gamma to 21474.83");
179 gamma=PNG_UINT_31_MAX;
185 png_warning(png_ptr, "Setting negative gamma to zero");
191 #ifdef PNG_FLOATING_POINT_SUPPORTED
192 info_ptr->gamma = (float)(gamma/100000.);
194 #ifdef PNG_FIXED_POINT_SUPPORTED
195 info_ptr->int_gamma = gamma;
197 info_ptr->valid |= PNG_INFO_gAMA;
199 png_warning(png_ptr, "Setting gamma=0");
203 #if defined(PNG_hIST_SUPPORTED)
205 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
209 png_debug1(1, "in %s storage function\n", "hIST");
210 if (png_ptr == NULL || info_ptr == NULL)
212 if (info_ptr->num_palette == 0)
215 "Palette size 0, hIST allocation skipped.");
219 #ifdef PNG_FREE_ME_SUPPORTED
220 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
222 /* Changed from info->num_palette to 256 in version 1.2.1 */
223 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
224 (png_uint_32)(256 * png_sizeof (png_uint_16)));
225 if (png_ptr->hist == NULL)
227 png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
231 for (i = 0; i < info_ptr->num_palette; i++)
232 png_ptr->hist[i] = hist[i];
233 info_ptr->hist = png_ptr->hist;
234 info_ptr->valid |= PNG_INFO_hIST;
236 #ifdef PNG_FREE_ME_SUPPORTED
237 info_ptr->free_me |= PNG_FREE_HIST;
239 png_ptr->flags |= PNG_FLAG_FREE_HIST;
245 png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
246 png_uint_32 width, png_uint_32 height, int bit_depth,
247 int color_type, int interlace_type, int compression_type,
250 png_debug1(1, "in %s storage function\n", "IHDR");
251 if (png_ptr == NULL || info_ptr == NULL)
254 /* check for width and height valid values */
255 if (width == 0 || height == 0)
256 png_error(png_ptr, "Image width or height is zero in IHDR");
257 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
258 if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
259 png_error(png_ptr, "image size exceeds user limits in IHDR");
261 if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
262 png_error(png_ptr, "image size exceeds user limits in IHDR");
264 if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
265 png_error(png_ptr, "Invalid image size in IHDR");
266 if ( width > (PNG_UINT_32_MAX
267 >> 3) /* 8-byte RGBA pixels */
268 - 64 /* bigrowbuf hack */
269 - 1 /* filter byte */
270 - 7*8 /* rounding of width to multiple of 8 pixels */
271 - 8) /* extra max_pixel_depth pad */
272 png_warning(png_ptr, "Width is too large for libpng to process pixels");
274 /* check other values */
275 if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
276 bit_depth != 8 && bit_depth != 16)
277 png_error(png_ptr, "Invalid bit depth in IHDR");
279 if (color_type < 0 || color_type == 1 ||
280 color_type == 5 || color_type > 6)
281 png_error(png_ptr, "Invalid color type in IHDR");
283 if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
284 ((color_type == PNG_COLOR_TYPE_RGB ||
285 color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
286 color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
287 png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
289 if (interlace_type >= PNG_INTERLACE_LAST)
290 png_error(png_ptr, "Unknown interlace method in IHDR");
292 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
293 png_error(png_ptr, "Unknown compression method in IHDR");
295 #if defined(PNG_MNG_FEATURES_SUPPORTED)
296 /* Accept filter_method 64 (intrapixel differencing) only if
297 * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
298 * 2. Libpng did not read a PNG signature (this filter_method is only
299 * used in PNG datastreams that are embedded in MNG datastreams) and
300 * 3. The application called png_permit_mng_features with a mask that
301 * included PNG_FLAG_MNG_FILTER_64 and
302 * 4. The filter_method is 64 and
303 * 5. The color_type is RGB or RGBA
305 if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
306 png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
307 if(filter_type != PNG_FILTER_TYPE_BASE)
309 if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
310 (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
311 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
312 (color_type == PNG_COLOR_TYPE_RGB ||
313 color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
314 png_error(png_ptr, "Unknown filter method in IHDR");
315 if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
316 png_warning(png_ptr, "Invalid filter method in IHDR");
319 if(filter_type != PNG_FILTER_TYPE_BASE)
320 png_error(png_ptr, "Unknown filter method in IHDR");
323 info_ptr->width = width;
324 info_ptr->height = height;
325 info_ptr->bit_depth = (png_byte)bit_depth;
326 info_ptr->color_type =(png_byte) color_type;
327 info_ptr->compression_type = (png_byte)compression_type;
328 info_ptr->filter_type = (png_byte)filter_type;
329 info_ptr->interlace_type = (png_byte)interlace_type;
330 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
331 info_ptr->channels = 1;
332 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
333 info_ptr->channels = 3;
335 info_ptr->channels = 1;
336 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
337 info_ptr->channels++;
338 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
340 /* check for potential overflow */
341 if ( width > (PNG_UINT_32_MAX
342 >> 3) /* 8-byte RGBA pixels */
343 - 64 /* bigrowbuf hack */
344 - 1 /* filter byte */
345 - 7*8 /* rounding of width to multiple of 8 pixels */
346 - 8) /* extra max_pixel_depth pad */
347 info_ptr->rowbytes = (png_size_t)0;
349 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width);
352 #if defined(PNG_oFFs_SUPPORTED)
354 png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
355 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
357 png_debug1(1, "in %s storage function\n", "oFFs");
358 if (png_ptr == NULL || info_ptr == NULL)
361 info_ptr->x_offset = offset_x;
362 info_ptr->y_offset = offset_y;
363 info_ptr->offset_unit_type = (png_byte)unit_type;
364 info_ptr->valid |= PNG_INFO_oFFs;
368 #if defined(PNG_pCAL_SUPPORTED)
370 png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
371 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
372 png_charp units, png_charpp params)
377 png_debug1(1, "in %s storage function\n", "pCAL");
378 if (png_ptr == NULL || info_ptr == NULL)
381 length = png_strlen(purpose) + 1;
382 png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
383 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
384 if (info_ptr->pcal_purpose == NULL)
386 png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
389 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
391 png_debug(3, "storing X0, X1, type, and nparams in info\n");
392 info_ptr->pcal_X0 = X0;
393 info_ptr->pcal_X1 = X1;
394 info_ptr->pcal_type = (png_byte)type;
395 info_ptr->pcal_nparams = (png_byte)nparams;
397 length = png_strlen(units) + 1;
398 png_debug1(3, "allocating units for info (%lu bytes)\n", length);
399 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
400 if (info_ptr->pcal_units == NULL)
402 png_warning(png_ptr, "Insufficient memory for pCAL units.");
405 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
407 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
408 (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
409 if (info_ptr->pcal_params == NULL)
411 png_warning(png_ptr, "Insufficient memory for pCAL params.");
415 info_ptr->pcal_params[nparams] = NULL;
417 for (i = 0; i < nparams; i++)
419 length = png_strlen(params[i]) + 1;
420 png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
421 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
422 if (info_ptr->pcal_params[i] == NULL)
424 png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
427 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
430 info_ptr->valid |= PNG_INFO_pCAL;
431 #ifdef PNG_FREE_ME_SUPPORTED
432 info_ptr->free_me |= PNG_FREE_PCAL;
437 #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
438 #ifdef PNG_FLOATING_POINT_SUPPORTED
440 png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
441 int unit, double width, double height)
443 png_debug1(1, "in %s storage function\n", "sCAL");
444 if (png_ptr == NULL || info_ptr == NULL)
447 info_ptr->scal_unit = (png_byte)unit;
448 info_ptr->scal_pixel_width = width;
449 info_ptr->scal_pixel_height = height;
451 info_ptr->valid |= PNG_INFO_sCAL;
454 #ifdef PNG_FIXED_POINT_SUPPORTED
456 png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
457 int unit, png_charp swidth, png_charp sheight)
461 png_debug1(1, "in %s storage function\n", "sCAL");
462 if (png_ptr == NULL || info_ptr == NULL)
465 info_ptr->scal_unit = (png_byte)unit;
467 length = png_strlen(swidth) + 1;
468 png_debug1(3, "allocating unit for info (%d bytes)\n", length);
469 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
470 if (info_ptr->scal_s_width == NULL)
472 png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
474 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
476 length = png_strlen(sheight) + 1;
477 png_debug1(3, "allocating unit for info (%d bytes)\n", length);
478 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
479 if (info_ptr->scal_s_height == NULL)
481 png_free (png_ptr, info_ptr->scal_s_width);
482 png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
484 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
486 info_ptr->valid |= PNG_INFO_sCAL;
487 #ifdef PNG_FREE_ME_SUPPORTED
488 info_ptr->free_me |= PNG_FREE_SCAL;
495 #if defined(PNG_pHYs_SUPPORTED)
497 png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
498 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
500 png_debug1(1, "in %s storage function\n", "pHYs");
501 if (png_ptr == NULL || info_ptr == NULL)
504 info_ptr->x_pixels_per_unit = res_x;
505 info_ptr->y_pixels_per_unit = res_y;
506 info_ptr->phys_unit_type = (png_byte)unit_type;
507 info_ptr->valid |= PNG_INFO_pHYs;
512 png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
513 png_colorp palette, int num_palette)
516 png_debug1(1, "in %s storage function\n", "PLTE");
517 if (png_ptr == NULL || info_ptr == NULL)
521 * It may not actually be necessary to set png_ptr->palette here;
522 * we do it for backward compatibility with the way the png_handle_tRNS
523 * function used to do the allocation.
525 #ifdef PNG_FREE_ME_SUPPORTED
526 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
529 /* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
530 in case of an invalid PNG file that has too-large sample values. */
531 png_ptr->palette = (png_colorp)png_malloc(png_ptr,
532 256 * png_sizeof(png_color));
533 png_memset(png_ptr->palette, 0, 256 * png_sizeof(png_color));
534 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color));
535 info_ptr->palette = png_ptr->palette;
536 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
538 #ifdef PNG_FREE_ME_SUPPORTED
539 info_ptr->free_me |= PNG_FREE_PLTE;
541 png_ptr->flags |= PNG_FLAG_FREE_PLTE;
544 info_ptr->valid |= PNG_INFO_PLTE;
547 #if defined(PNG_sBIT_SUPPORTED)
549 png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
550 png_color_8p sig_bit)
552 png_debug1(1, "in %s storage function\n", "sBIT");
553 if (png_ptr == NULL || info_ptr == NULL)
556 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof (png_color_8));
557 info_ptr->valid |= PNG_INFO_sBIT;
561 #if defined(PNG_sRGB_SUPPORTED)
563 png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
565 png_debug1(1, "in %s storage function\n", "sRGB");
566 if (png_ptr == NULL || info_ptr == NULL)
569 info_ptr->srgb_intent = (png_byte)intent;
570 info_ptr->valid |= PNG_INFO_sRGB;
574 png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
577 #if defined(PNG_gAMA_SUPPORTED)
578 #ifdef PNG_FLOATING_POINT_SUPPORTED
581 #ifdef PNG_FIXED_POINT_SUPPORTED
582 png_fixed_point int_file_gamma;
585 #if defined(PNG_cHRM_SUPPORTED)
586 #ifdef PNG_FLOATING_POINT_SUPPORTED
587 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
589 #ifdef PNG_FIXED_POINT_SUPPORTED
590 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
591 int_green_y, int_blue_x, int_blue_y;
594 png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
595 if (png_ptr == NULL || info_ptr == NULL)
598 png_set_sRGB(png_ptr, info_ptr, intent);
600 #if defined(PNG_gAMA_SUPPORTED)
601 #ifdef PNG_FLOATING_POINT_SUPPORTED
602 file_gamma = (float).45455;
603 png_set_gAMA(png_ptr, info_ptr, file_gamma);
605 #ifdef PNG_FIXED_POINT_SUPPORTED
606 int_file_gamma = 45455L;
607 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
611 #if defined(PNG_cHRM_SUPPORTED)
612 #ifdef PNG_FIXED_POINT_SUPPORTED
613 int_white_x = 31270L;
614 int_white_y = 32900L;
617 int_green_x = 30000L;
618 int_green_y = 60000L;
622 png_set_cHRM_fixed(png_ptr, info_ptr,
623 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
624 int_blue_x, int_blue_y);
626 #ifdef PNG_FLOATING_POINT_SUPPORTED
627 white_x = (float).3127;
628 white_y = (float).3290;
631 green_x = (float).30;
632 green_y = (float).60;
636 png_set_cHRM(png_ptr, info_ptr,
637 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
644 #if defined(PNG_iCCP_SUPPORTED)
646 png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
647 png_charp name, int compression_type,
648 png_charp profile, png_uint_32 proflen)
650 png_charp new_iccp_name;
651 png_charp new_iccp_profile;
653 png_debug1(1, "in %s storage function\n", "iCCP");
654 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
657 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, png_strlen(name)+1);
658 if (new_iccp_name == NULL)
660 png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
663 png_strcpy(new_iccp_name, name);
664 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
665 if (new_iccp_profile == NULL)
667 png_free (png_ptr, new_iccp_name);
668 png_warning(png_ptr, "Insufficient memory to process iCCP profile.");
671 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
673 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
675 info_ptr->iccp_proflen = proflen;
676 info_ptr->iccp_name = new_iccp_name;
677 info_ptr->iccp_profile = new_iccp_profile;
678 /* Compression is always zero but is here so the API and info structure
679 * does not have to change if we introduce multiple compression types */
680 info_ptr->iccp_compression = (png_byte)compression_type;
681 #ifdef PNG_FREE_ME_SUPPORTED
682 info_ptr->free_me |= PNG_FREE_ICCP;
684 info_ptr->valid |= PNG_INFO_iCCP;
688 #if defined(PNG_TEXT_SUPPORTED)
690 png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
694 ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
696 png_error(png_ptr, "Insufficient memory to store text");
700 png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
705 png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
706 "text" : (png_const_charp)png_ptr->chunk_name));
708 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
711 /* Make sure we have enough space in the "text" array in info_struct
712 * to hold all of the incoming text_ptr objects.
714 if (info_ptr->num_text + num_text > info_ptr->max_text)
716 if (info_ptr->text != NULL)
721 old_max = info_ptr->max_text;
722 info_ptr->max_text = info_ptr->num_text + num_text + 8;
723 old_text = info_ptr->text;
724 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
725 (png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
726 if (info_ptr->text == NULL)
728 png_free(png_ptr, old_text);
731 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
732 png_sizeof(png_text)));
733 png_free(png_ptr, old_text);
737 info_ptr->max_text = num_text + 8;
738 info_ptr->num_text = 0;
739 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
740 (png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
741 if (info_ptr->text == NULL)
743 #ifdef PNG_FREE_ME_SUPPORTED
744 info_ptr->free_me |= PNG_FREE_TEXT;
747 png_debug1(3, "allocated %d entries for info_ptr->text\n",
750 for (i = 0; i < num_text; i++)
752 png_size_t text_length,key_len;
753 png_size_t lang_len,lang_key_len;
754 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
756 if (text_ptr[i].key == NULL)
759 key_len = png_strlen(text_ptr[i].key);
761 if(text_ptr[i].compression <= 0)
767 #ifdef PNG_iTXt_SUPPORTED
770 if (text_ptr[i].lang != NULL)
771 lang_len = png_strlen(text_ptr[i].lang);
774 if (text_ptr[i].lang_key != NULL)
775 lang_key_len = png_strlen(text_ptr[i].lang_key);
781 png_warning(png_ptr, "iTXt chunk not supported.");
786 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
789 #ifdef PNG_iTXt_SUPPORTED
790 if(text_ptr[i].compression > 0)
791 textp->compression = PNG_ITXT_COMPRESSION_NONE;
794 textp->compression = PNG_TEXT_COMPRESSION_NONE;
798 text_length = png_strlen(text_ptr[i].text);
799 textp->compression = text_ptr[i].compression;
802 textp->key = (png_charp)png_malloc_warn(png_ptr,
803 (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
804 if (textp->key == NULL)
806 png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
807 (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
810 png_memcpy(textp->key, text_ptr[i].key,
811 (png_size_t)(key_len));
812 *(textp->key+key_len) = '\0';
813 #ifdef PNG_iTXt_SUPPORTED
814 if (text_ptr[i].compression > 0)
816 textp->lang=textp->key + key_len + 1;
817 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
818 *(textp->lang+lang_len) = '\0';
819 textp->lang_key=textp->lang + lang_len + 1;
820 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
821 *(textp->lang_key+lang_key_len) = '\0';
822 textp->text=textp->lang_key + lang_key_len + 1;
827 #ifdef PNG_iTXt_SUPPORTED
829 textp->lang_key=NULL;
831 textp->text=textp->key + key_len + 1;
834 png_memcpy(textp->text, text_ptr[i].text,
835 (png_size_t)(text_length));
836 *(textp->text+text_length) = '\0';
838 #ifdef PNG_iTXt_SUPPORTED
839 if(textp->compression > 0)
841 textp->text_length = 0;
842 textp->itxt_length = text_length;
847 textp->text_length = text_length;
848 #ifdef PNG_iTXt_SUPPORTED
849 textp->itxt_length = 0;
852 info_ptr->text[info_ptr->num_text]= *textp;
853 info_ptr->num_text++;
854 png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
860 #if defined(PNG_tIME_SUPPORTED)
862 png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
864 png_debug1(1, "in %s storage function\n", "tIME");
865 if (png_ptr == NULL || info_ptr == NULL ||
866 (png_ptr->mode & PNG_WROTE_tIME))
869 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof (png_time));
870 info_ptr->valid |= PNG_INFO_tIME;
874 #if defined(PNG_tRNS_SUPPORTED)
876 png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
877 png_bytep trans, int num_trans, png_color_16p trans_values)
879 png_debug1(1, "in %s storage function\n", "tRNS");
880 if (png_ptr == NULL || info_ptr == NULL)
886 * It may not actually be necessary to set png_ptr->trans here;
887 * we do it for backward compatibility with the way the png_handle_tRNS
888 * function used to do the allocation.
890 #ifdef PNG_FREE_ME_SUPPORTED
891 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
893 /* Changed from num_trans to 256 in version 1.2.1 */
894 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
896 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
897 #ifdef PNG_FREE_ME_SUPPORTED
898 info_ptr->free_me |= PNG_FREE_TRNS;
900 png_ptr->flags |= PNG_FLAG_FREE_TRNS;
904 if (trans_values != NULL)
906 png_memcpy(&(info_ptr->trans_values), trans_values,
907 png_sizeof(png_color_16));
911 info_ptr->num_trans = (png_uint_16)num_trans;
912 info_ptr->valid |= PNG_INFO_tRNS;
916 #if defined(PNG_sPLT_SUPPORTED)
918 png_set_sPLT(png_structp png_ptr,
919 png_infop info_ptr, png_sPLT_tp entries, int nentries)
924 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
925 (info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t));
928 png_warning(png_ptr, "No memory for sPLT palettes.");
932 png_memcpy(np, info_ptr->splt_palettes,
933 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
934 png_free(png_ptr, info_ptr->splt_palettes);
935 info_ptr->splt_palettes=NULL;
937 for (i = 0; i < nentries; i++)
939 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
940 png_sPLT_tp from = entries + i;
942 to->name = (png_charp)png_malloc(png_ptr,
943 png_strlen(from->name) + 1);
944 /* TODO: use png_malloc_warn */
945 png_strcpy(to->name, from->name);
946 to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
947 from->nentries * png_sizeof(png_sPLT_t));
948 /* TODO: use png_malloc_warn */
949 png_memcpy(to->entries, from->entries,
950 from->nentries * png_sizeof(png_sPLT_t));
951 to->nentries = from->nentries;
952 to->depth = from->depth;
955 info_ptr->splt_palettes = np;
956 info_ptr->splt_palettes_num += nentries;
957 info_ptr->valid |= PNG_INFO_sPLT;
958 #ifdef PNG_FREE_ME_SUPPORTED
959 info_ptr->free_me |= PNG_FREE_SPLT;
962 #endif /* PNG_sPLT_SUPPORTED */
964 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
966 png_set_unknown_chunks(png_structp png_ptr,
967 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
969 png_unknown_chunkp np;
972 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
975 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
976 (info_ptr->unknown_chunks_num + num_unknowns) *
977 png_sizeof(png_unknown_chunk));
980 png_warning(png_ptr, "Out of memory while processing unknown chunk.");
984 png_memcpy(np, info_ptr->unknown_chunks,
985 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
986 png_free(png_ptr, info_ptr->unknown_chunks);
987 info_ptr->unknown_chunks=NULL;
989 for (i = 0; i < num_unknowns; i++)
991 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
992 png_unknown_chunkp from = unknowns + i;
994 png_strncpy((png_charp)to->name, (png_charp)from->name, 5);
995 to->data = (png_bytep)png_malloc_warn(png_ptr, from->size);
996 if (to->data == NULL)
998 png_warning(png_ptr, "Out of memory processing unknown chunk.");
1002 png_memcpy(to->data, from->data, from->size);
1003 to->size = from->size;
1005 /* note our location in the read or write sequence */
1006 to->location = (png_byte)(png_ptr->mode & 0xff);
1010 info_ptr->unknown_chunks = np;
1011 info_ptr->unknown_chunks_num += num_unknowns;
1012 #ifdef PNG_FREE_ME_SUPPORTED
1013 info_ptr->free_me |= PNG_FREE_UNKN;
1017 png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1018 int chunk, int location)
1020 if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1021 (int)info_ptr->unknown_chunks_num)
1022 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1026 #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
1027 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
1029 png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
1031 /* This function is deprecated in favor of png_permit_mng_features()
1032 and will be removed from libpng-2.0.0 */
1033 png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
1034 if (png_ptr == NULL)
1036 png_ptr->mng_features_permitted = (png_byte)
1037 ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) |
1038 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
1042 #if defined(PNG_MNG_FEATURES_SUPPORTED)
1044 png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1046 png_debug(1, "in png_permit_mng_features\n");
1047 if (png_ptr == NULL)
1048 return (png_uint_32)0;
1049 png_ptr->mng_features_permitted =
1050 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1051 return (png_uint_32)png_ptr->mng_features_permitted;
1055 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1057 png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
1058 chunk_list, int num_chunks)
1060 png_bytep new_list, p;
1061 int i, old_num_chunks;
1062 if (num_chunks == 0)
1064 if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1065 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1067 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1069 if(keep == PNG_HANDLE_CHUNK_ALWAYS)
1070 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1072 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1075 if (chunk_list == NULL)
1077 old_num_chunks=png_ptr->num_chunk_list;
1078 new_list=(png_bytep)png_malloc(png_ptr,
1079 (png_uint_32)(5*(num_chunks+old_num_chunks)));
1080 if(png_ptr->chunk_list != NULL)
1082 png_memcpy(new_list, png_ptr->chunk_list,
1083 (png_size_t)(5*old_num_chunks));
1084 png_free(png_ptr, png_ptr->chunk_list);
1085 png_ptr->chunk_list=NULL;
1087 png_memcpy(new_list+5*old_num_chunks, chunk_list,
1088 (png_size_t)(5*num_chunks));
1089 for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
1091 png_ptr->num_chunk_list=old_num_chunks+num_chunks;
1092 png_ptr->chunk_list=new_list;
1093 #ifdef PNG_FREE_ME_SUPPORTED
1094 png_ptr->free_me |= PNG_FREE_LIST;
1099 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
1101 png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1102 png_user_chunk_ptr read_user_chunk_fn)
1104 png_debug(1, "in png_set_read_user_chunk_fn\n");
1105 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1106 png_ptr->user_chunk_ptr = user_chunk_ptr;
1110 #if defined(PNG_INFO_IMAGE_SUPPORTED)
1112 png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1114 png_debug1(1, "in %s storage function\n", "rows");
1116 if (png_ptr == NULL || info_ptr == NULL)
1119 if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1120 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1121 info_ptr->row_pointers = row_pointers;
1123 info_ptr->valid |= PNG_INFO_IDAT;
1127 #ifdef PNG_WRITE_SUPPORTED
1129 png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
1132 png_free(png_ptr, png_ptr->zbuf);
1133 png_ptr->zbuf_size = (png_size_t)size;
1134 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1135 png_ptr->zstream.next_out = png_ptr->zbuf;
1136 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1141 png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1143 if (png_ptr && info_ptr)
1144 info_ptr->valid &= ~(mask);
1149 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1150 /* this function was added to libpng 1.2.0 and should always exist by default */
1152 png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
1154 png_uint_32 settable_asm_flags;
1155 png_uint_32 settable_mmx_flags;
1157 settable_mmx_flags =
1158 #ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
1159 PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
1161 #ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
1162 PNG_ASM_FLAG_MMX_READ_INTERLACE |
1164 #ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1165 PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
1166 PNG_ASM_FLAG_MMX_READ_FILTER_UP |
1167 PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
1168 PNG_ASM_FLAG_MMX_READ_FILTER_PAETH |
1172 /* could be some non-MMX ones in the future, but not currently: */
1173 settable_asm_flags = settable_mmx_flags;
1175 if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) ||
1176 !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU))
1178 /* clear all MMX flags if MMX isn't supported */
1179 settable_asm_flags &= ~settable_mmx_flags;
1180 png_ptr->asm_flags &= ~settable_mmx_flags;
1183 /* we're replacing the settable bits with those passed in by the user,
1184 * so first zero them out of the master copy, then logical-OR in the
1185 * allowed subset that was requested */
1187 png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */
1188 png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */
1190 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1192 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1193 /* this function was added to libpng 1.2.0 */
1195 png_set_mmx_thresholds (png_structp png_ptr,
1196 png_byte mmx_bitdepth_threshold,
1197 png_uint_32 mmx_rowbytes_threshold)
1199 png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
1200 png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
1202 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1204 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
1205 /* this function was added to libpng 1.2.6 */
1207 png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1208 png_uint_32 user_height_max)
1210 /* Images with dimensions larger than these limits will be
1211 * rejected by png_set_IHDR(). To accept any PNG datastream
1212 * regardless of dimensions, set both limits to 0x7ffffffL.
1214 png_ptr->user_width_max = user_width_max;
1215 png_ptr->user_height_max = user_height_max;
1217 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1219 #endif /* ?PNG_1_0_X */