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
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* 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)
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png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
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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,
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double white_x, double white_y, double red_x, double red_y,
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double green_x, double green_y, double blue_x, double blue_y)
39
png_debug1(1, "in %s storage function\n", "cHRM");
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if (png_ptr == NULL || info_ptr == NULL)
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if (white_x < 0.0 || white_y < 0.0 ||
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red_x < 0.0 || red_y < 0.0 ||
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green_x < 0.0 || green_y < 0.0 ||
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blue_x < 0.0 || blue_y < 0.0)
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"Ignoring attempt to set negative chromaticity value");
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if (white_x > 21474.83 || white_y > 21474.83 ||
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red_x > 21474.83 || red_y > 21474.83 ||
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green_x > 21474.83 || green_y > 21474.83 ||
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blue_x > 21474.83 || blue_y > 21474.83)
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"Ignoring attempt to set chromaticity value exceeding 21474.83");
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info_ptr->x_white = (float)white_x;
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info_ptr->y_white = (float)white_y;
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info_ptr->x_red = (float)red_x;
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info_ptr->y_red = (float)red_y;
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info_ptr->x_green = (float)green_x;
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info_ptr->y_green = (float)green_y;
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info_ptr->x_blue = (float)blue_x;
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info_ptr->y_blue = (float)blue_y;
70
#ifdef PNG_FIXED_POINT_SUPPORTED
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info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
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info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
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info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
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info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
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info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
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info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
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info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
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info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
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info_ptr->valid |= PNG_INFO_cHRM;
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#ifdef PNG_FIXED_POINT_SUPPORTED
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png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
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png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
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png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
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png_fixed_point blue_x, png_fixed_point blue_y)
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png_debug1(1, "in %s storage function\n", "cHRM");
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if (png_ptr == NULL || info_ptr == NULL)
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if (white_x < 0 || white_y < 0 ||
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red_x < 0 || red_y < 0 ||
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green_x < 0 || green_y < 0 ||
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blue_x < 0 || blue_y < 0)
100
"Ignoring attempt to set negative chromaticity value");
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if (white_x > (double) PNG_UINT_31_MAX ||
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white_y > (double) PNG_UINT_31_MAX ||
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red_x > (double) PNG_UINT_31_MAX ||
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red_y > (double) PNG_UINT_31_MAX ||
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green_x > (double) PNG_UINT_31_MAX ||
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green_y > (double) PNG_UINT_31_MAX ||
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blue_x > (double) PNG_UINT_31_MAX ||
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blue_y > (double) PNG_UINT_31_MAX)
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"Ignoring attempt to set chromaticity value exceeding 21474.83");
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info_ptr->int_x_white = white_x;
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info_ptr->int_y_white = white_y;
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info_ptr->int_x_red = red_x;
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info_ptr->int_y_red = red_y;
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info_ptr->int_x_green = green_x;
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info_ptr->int_y_green = green_y;
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info_ptr->int_x_blue = blue_x;
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info_ptr->int_y_blue = blue_y;
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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info_ptr->x_white = (float)(white_x/100000.);
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info_ptr->y_white = (float)(white_y/100000.);
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info_ptr->x_red = (float)( red_x/100000.);
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info_ptr->y_red = (float)( red_y/100000.);
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info_ptr->x_green = (float)(green_x/100000.);
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info_ptr->y_green = (float)(green_y/100000.);
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info_ptr->x_blue = (float)( blue_x/100000.);
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info_ptr->y_blue = (float)( blue_y/100000.);
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info_ptr->valid |= PNG_INFO_cHRM;
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#if defined(PNG_gAMA_SUPPORTED)
140
#ifdef PNG_FLOATING_POINT_SUPPORTED
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png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
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png_debug1(1, "in %s storage function\n", "gAMA");
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if (png_ptr == NULL || info_ptr == NULL)
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/* Check for overflow */
150
if (file_gamma > 21474.83)
152
png_warning(png_ptr, "Limiting gamma to 21474.83");
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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;
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png_warning(png_ptr, "Setting gamma=0");
167
png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
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png_fixed_point gamma;
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png_debug1(1, "in %s storage function\n", "gAMA");
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if (png_ptr == NULL || info_ptr == NULL)
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if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
178
png_warning(png_ptr, "Limiting gamma to 21474.83");
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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;
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info_ptr->valid |= PNG_INFO_gAMA;
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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.");
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for (i = 0; i < info_ptr->num_palette; i++)
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png_ptr->hist[i] = hist[i];
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info_ptr->hist = png_ptr->hist;
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info_ptr->valid |= PNG_INFO_hIST;
236
#ifdef PNG_FREE_ME_SUPPORTED
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info_ptr->free_me |= PNG_FREE_HIST;
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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 ||
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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;
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info_ptr->color_type =(png_byte) color_type;
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info_ptr->compression_type = (png_byte)compression_type;
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info_ptr->filter_type = (png_byte)filter_type;
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info_ptr->interlace_type = (png_byte)interlace_type;
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if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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info_ptr->channels = 1;
332
else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
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info_ptr->channels = 3;
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info_ptr->channels = 1;
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if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
337
info_ptr->channels++;
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info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
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/* check for potential overflow */
341
if ( width > (PNG_UINT_32_MAX
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>> 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 */
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info_ptr->rowbytes = (png_size_t)0;
349
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width);
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#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 */