/* pngset.c - storage of image information into info struct | |
* | |
* Last changed in libpng 1.5.4 [July 7, 2011] | |
* Copyright (c) 1998-2011 Glenn Randers-Pehrson | |
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) | |
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) | |
* | |
* This code is released under the libpng license. | |
* For conditions of distribution and use, see the disclaimer | |
* and license in png.h | |
* | |
* The functions here are used during reads to store data from the file | |
* into the info struct, and during writes to store application data | |
* into the info struct for writing into the file. This abstracts the | |
* info struct and allows us to change the structure in the future. | |
*/ | |
#include "pngpriv.h" | |
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) | |
#ifdef PNG_bKGD_SUPPORTED | |
void PNGAPI | |
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, | |
png_const_color_16p background) | |
{ | |
png_debug1(1, "in %s storage function", "bKGD"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16)); | |
info_ptr->valid |= PNG_INFO_bKGD; | |
} | |
#endif | |
#ifdef PNG_cHRM_SUPPORTED | |
void PNGFAPI | |
png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, | |
png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, | |
png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, | |
png_fixed_point blue_x, png_fixed_point blue_y) | |
{ | |
png_debug1(1, "in %s storage function", "cHRM fixed"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
# ifdef PNG_CHECK_cHRM_SUPPORTED | |
if (png_check_cHRM_fixed(png_ptr, | |
white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) | |
# endif | |
{ | |
info_ptr->x_white = white_x; | |
info_ptr->y_white = white_y; | |
info_ptr->x_red = red_x; | |
info_ptr->y_red = red_y; | |
info_ptr->x_green = green_x; | |
info_ptr->y_green = green_y; | |
info_ptr->x_blue = blue_x; | |
info_ptr->y_blue = blue_y; | |
info_ptr->valid |= PNG_INFO_cHRM; | |
} | |
} | |
# ifdef PNG_FLOATING_POINT_SUPPORTED | |
void PNGAPI | |
png_set_cHRM(png_structp png_ptr, png_infop info_ptr, | |
double white_x, double white_y, double red_x, double red_y, | |
double green_x, double green_y, double blue_x, double blue_y) | |
{ | |
png_set_cHRM_fixed(png_ptr, info_ptr, | |
png_fixed(png_ptr, white_x, "cHRM White X"), | |
png_fixed(png_ptr, white_y, "cHRM White Y"), | |
png_fixed(png_ptr, red_x, "cHRM Red X"), | |
png_fixed(png_ptr, red_y, "cHRM Red Y"), | |
png_fixed(png_ptr, green_x, "cHRM Green X"), | |
png_fixed(png_ptr, green_y, "cHRM Green Y"), | |
png_fixed(png_ptr, blue_x, "cHRM Blue X"), | |
png_fixed(png_ptr, blue_y, "cHRM Blue Y")); | |
} | |
# endif /* PNG_FLOATING_POINT_SUPPORTED */ | |
#endif /* PNG_cHRM_SUPPORTED */ | |
#ifdef PNG_gAMA_SUPPORTED | |
void PNGFAPI | |
png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point | |
file_gamma) | |
{ | |
png_debug1(1, "in %s storage function", "gAMA"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
/* Changed in libpng-1.5.4 to limit the values to ensure overflow can't | |
* occur. Since the fixed point representation is assymetrical it is | |
* possible for 1/gamma to overflow the limit of 21474 and this means the | |
* gamma value must be at least 5/100000 and hence at most 20000.0. For | |
* safety the limits here are a little narrower. The values are 0.00016 to | |
* 6250.0, which are truely ridiculous gammma values (and will produce | |
* displays that are all black or all white.) | |
*/ | |
if (file_gamma < 16 || file_gamma > 625000000) | |
png_warning(png_ptr, "Out of range gamma value ignored"); | |
else | |
{ | |
info_ptr->gamma = file_gamma; | |
info_ptr->valid |= PNG_INFO_gAMA; | |
} | |
} | |
# ifdef PNG_FLOATING_POINT_SUPPORTED | |
void PNGAPI | |
png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) | |
{ | |
png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, | |
"png_set_gAMA")); | |
} | |
# endif | |
#endif | |
#ifdef PNG_hIST_SUPPORTED | |
void PNGAPI | |
png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist) | |
{ | |
int i; | |
png_debug1(1, "in %s storage function", "hIST"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
if (info_ptr->num_palette == 0 || info_ptr->num_palette | |
> PNG_MAX_PALETTE_LENGTH) | |
{ | |
png_warning(png_ptr, | |
"Invalid palette size, hIST allocation skipped"); | |
return; | |
} | |
png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); | |
/* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in | |
* version 1.2.1 | |
*/ | |
png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, | |
PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)); | |
if (png_ptr->hist == NULL) | |
{ | |
png_warning(png_ptr, "Insufficient memory for hIST chunk data"); | |
return; | |
} | |
for (i = 0; i < info_ptr->num_palette; i++) | |
png_ptr->hist[i] = hist[i]; | |
info_ptr->hist = png_ptr->hist; | |
info_ptr->valid |= PNG_INFO_hIST; | |
info_ptr->free_me |= PNG_FREE_HIST; | |
} | |
#endif | |
void PNGAPI | |
png_set_IHDR(png_structp png_ptr, png_infop info_ptr, | |
png_uint_32 width, png_uint_32 height, int bit_depth, | |
int color_type, int interlace_type, int compression_type, | |
int filter_type) | |
{ | |
png_debug1(1, "in %s storage function", "IHDR"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
info_ptr->width = width; | |
info_ptr->height = height; | |
info_ptr->bit_depth = (png_byte)bit_depth; | |
info_ptr->color_type = (png_byte)color_type; | |
info_ptr->compression_type = (png_byte)compression_type; | |
info_ptr->filter_type = (png_byte)filter_type; | |
info_ptr->interlace_type = (png_byte)interlace_type; | |
png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, | |
info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, | |
info_ptr->compression_type, info_ptr->filter_type); | |
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) | |
info_ptr->channels = 1; | |
else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) | |
info_ptr->channels = 3; | |
else | |
info_ptr->channels = 1; | |
if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) | |
info_ptr->channels++; | |
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); | |
/* Check for potential overflow */ | |
if (width > | |
(PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */ | |
- 48 /* bigrowbuf hack */ | |
- 1 /* filter byte */ | |
- 7*8 /* rounding of width to multiple of 8 pixels */ | |
- 8) /* extra max_pixel_depth pad */ | |
info_ptr->rowbytes = 0; | |
else | |
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); | |
} | |
#ifdef PNG_oFFs_SUPPORTED | |
void PNGAPI | |
png_set_oFFs(png_structp png_ptr, png_infop info_ptr, | |
png_int_32 offset_x, png_int_32 offset_y, int unit_type) | |
{ | |
png_debug1(1, "in %s storage function", "oFFs"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
info_ptr->x_offset = offset_x; | |
info_ptr->y_offset = offset_y; | |
info_ptr->offset_unit_type = (png_byte)unit_type; | |
info_ptr->valid |= PNG_INFO_oFFs; | |
} | |
#endif | |
#ifdef PNG_pCAL_SUPPORTED | |
void PNGAPI | |
png_set_pCAL(png_structp png_ptr, png_infop info_ptr, | |
png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, | |
int nparams, png_const_charp units, png_charpp params) | |
{ | |
png_size_t length; | |
int i; | |
png_debug1(1, "in %s storage function", "pCAL"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
length = png_strlen(purpose) + 1; | |
png_debug1(3, "allocating purpose for info (%lu bytes)", | |
(unsigned long)length); | |
/* TODO: validate format of calibration name and unit name */ | |
/* Check that the type matches the specification. */ | |
if (type < 0 || type > 3) | |
png_error(png_ptr, "Invalid pCAL equation type"); | |
/* Validate params[nparams] */ | |
for (i=0; i<nparams; ++i) | |
if (!png_check_fp_string(params[i], png_strlen(params[i]))) | |
png_error(png_ptr, "Invalid format for pCAL parameter"); | |
info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); | |
if (info_ptr->pcal_purpose == NULL) | |
{ | |
png_warning(png_ptr, "Insufficient memory for pCAL purpose"); | |
return; | |
} | |
png_memcpy(info_ptr->pcal_purpose, purpose, length); | |
png_debug(3, "storing X0, X1, type, and nparams in info"); | |
info_ptr->pcal_X0 = X0; | |
info_ptr->pcal_X1 = X1; | |
info_ptr->pcal_type = (png_byte)type; | |
info_ptr->pcal_nparams = (png_byte)nparams; | |
length = png_strlen(units) + 1; | |
png_debug1(3, "allocating units for info (%lu bytes)", | |
(unsigned long)length); | |
info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); | |
if (info_ptr->pcal_units == NULL) | |
{ | |
png_warning(png_ptr, "Insufficient memory for pCAL units"); | |
return; | |
} | |
png_memcpy(info_ptr->pcal_units, units, length); | |
info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, | |
(png_size_t)((nparams + 1) * png_sizeof(png_charp))); | |
if (info_ptr->pcal_params == NULL) | |
{ | |
png_warning(png_ptr, "Insufficient memory for pCAL params"); | |
return; | |
} | |
png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp)); | |
for (i = 0; i < nparams; i++) | |
{ | |
length = png_strlen(params[i]) + 1; | |
png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, | |
(unsigned long)length); | |
info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); | |
if (info_ptr->pcal_params[i] == NULL) | |
{ | |
png_warning(png_ptr, "Insufficient memory for pCAL parameter"); | |
return; | |
} | |
png_memcpy(info_ptr->pcal_params[i], params[i], length); | |
} | |
info_ptr->valid |= PNG_INFO_pCAL; | |
info_ptr->free_me |= PNG_FREE_PCAL; | |
} | |
#endif | |
#ifdef PNG_sCAL_SUPPORTED | |
void PNGAPI | |
png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, | |
int unit, png_const_charp swidth, png_const_charp sheight) | |
{ | |
png_size_t lengthw = 0, lengthh = 0; | |
png_debug1(1, "in %s storage function", "sCAL"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
/* Double check the unit (should never get here with an invalid | |
* unit unless this is an API call.) | |
*/ | |
if (unit != 1 && unit != 2) | |
png_error(png_ptr, "Invalid sCAL unit"); | |
if (swidth == NULL || (lengthw = png_strlen(swidth)) == 0 || | |
swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) | |
png_error(png_ptr, "Invalid sCAL width"); | |
if (sheight == NULL || (lengthh = png_strlen(sheight)) == 0 || | |
sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) | |
png_error(png_ptr, "Invalid sCAL height"); | |
info_ptr->scal_unit = (png_byte)unit; | |
++lengthw; | |
png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); | |
info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw); | |
if (info_ptr->scal_s_width == NULL) | |
{ | |
png_warning(png_ptr, "Memory allocation failed while processing sCAL"); | |
return; | |
} | |
png_memcpy(info_ptr->scal_s_width, swidth, lengthw); | |
++lengthh; | |
png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); | |
info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh); | |
if (info_ptr->scal_s_height == NULL) | |
{ | |
png_free (png_ptr, info_ptr->scal_s_width); | |
info_ptr->scal_s_width = NULL; | |
png_warning(png_ptr, "Memory allocation failed while processing sCAL"); | |
return; | |
} | |
png_memcpy(info_ptr->scal_s_height, sheight, lengthh); | |
info_ptr->valid |= PNG_INFO_sCAL; | |
info_ptr->free_me |= PNG_FREE_SCAL; | |
} | |
# ifdef PNG_FLOATING_POINT_SUPPORTED | |
void PNGAPI | |
png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, | |
double height) | |
{ | |
png_debug1(1, "in %s storage function", "sCAL"); | |
/* Check the arguments. */ | |
if (width <= 0) | |
png_warning(png_ptr, "Invalid sCAL width ignored"); | |
else if (height <= 0) | |
png_warning(png_ptr, "Invalid sCAL height ignored"); | |
else | |
{ | |
/* Convert 'width' and 'height' to ASCII. */ | |
char swidth[PNG_sCAL_MAX_DIGITS+1]; | |
char sheight[PNG_sCAL_MAX_DIGITS+1]; | |
png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width, | |
PNG_sCAL_PRECISION); | |
png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height, | |
PNG_sCAL_PRECISION); | |
png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); | |
} | |
} | |
# endif | |
# ifdef PNG_FIXED_POINT_SUPPORTED | |
void PNGAPI | |
png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, | |
png_fixed_point width, png_fixed_point height) | |
{ | |
png_debug1(1, "in %s storage function", "sCAL"); | |
/* Check the arguments. */ | |
if (width <= 0) | |
png_warning(png_ptr, "Invalid sCAL width ignored"); | |
else if (height <= 0) | |
png_warning(png_ptr, "Invalid sCAL height ignored"); | |
else | |
{ | |
/* Convert 'width' and 'height' to ASCII. */ | |
char swidth[PNG_sCAL_MAX_DIGITS+1]; | |
char sheight[PNG_sCAL_MAX_DIGITS+1]; | |
png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width); | |
png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height); | |
png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); | |
} | |
} | |
# endif | |
#endif | |
#ifdef PNG_pHYs_SUPPORTED | |
void PNGAPI | |
png_set_pHYs(png_structp png_ptr, png_infop info_ptr, | |
png_uint_32 res_x, png_uint_32 res_y, int unit_type) | |
{ | |
png_debug1(1, "in %s storage function", "pHYs"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
info_ptr->x_pixels_per_unit = res_x; | |
info_ptr->y_pixels_per_unit = res_y; | |
info_ptr->phys_unit_type = (png_byte)unit_type; | |
info_ptr->valid |= PNG_INFO_pHYs; | |
} | |
#endif | |
void PNGAPI | |
png_set_PLTE(png_structp png_ptr, png_infop info_ptr, | |
png_const_colorp palette, int num_palette) | |
{ | |
png_debug1(1, "in %s storage function", "PLTE"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) | |
{ | |
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) | |
png_error(png_ptr, "Invalid palette length"); | |
else | |
{ | |
png_warning(png_ptr, "Invalid palette length"); | |
return; | |
} | |
} | |
/* It may not actually be necessary to set png_ptr->palette here; | |
* we do it for backward compatibility with the way the png_handle_tRNS | |
* function used to do the allocation. | |
*/ | |
png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); | |
/* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead | |
* of num_palette entries, in case of an invalid PNG file that has | |
* too-large sample values. | |
*/ | |
png_ptr->palette = (png_colorp)png_calloc(png_ptr, | |
PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); | |
png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); | |
info_ptr->palette = png_ptr->palette; | |
info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; | |
info_ptr->free_me |= PNG_FREE_PLTE; | |
info_ptr->valid |= PNG_INFO_PLTE; | |
} | |
#ifdef PNG_sBIT_SUPPORTED | |
void PNGAPI | |
png_set_sBIT(png_structp png_ptr, png_infop info_ptr, | |
png_const_color_8p sig_bit) | |
{ | |
png_debug1(1, "in %s storage function", "sBIT"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8)); | |
info_ptr->valid |= PNG_INFO_sBIT; | |
} | |
#endif | |
#ifdef PNG_sRGB_SUPPORTED | |
void PNGAPI | |
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent) | |
{ | |
png_debug1(1, "in %s storage function", "sRGB"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
info_ptr->srgb_intent = (png_byte)srgb_intent; | |
info_ptr->valid |= PNG_INFO_sRGB; | |
} | |
void PNGAPI | |
png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, | |
int srgb_intent) | |
{ | |
png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
png_set_sRGB(png_ptr, info_ptr, srgb_intent); | |
# ifdef PNG_gAMA_SUPPORTED | |
png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); | |
# endif | |
# ifdef PNG_cHRM_SUPPORTED | |
png_set_cHRM_fixed(png_ptr, info_ptr, | |
/* color x y */ | |
/* white */ 31270L, 32900L, | |
/* red */ 64000L, 33000L, | |
/* green */ 30000L, 60000L, | |
/* blue */ 15000L, 6000L | |
); | |
# endif /* cHRM */ | |
} | |
#endif /* sRGB */ | |
#ifdef PNG_iCCP_SUPPORTED | |
void PNGAPI | |
png_set_iCCP(png_structp png_ptr, png_infop info_ptr, | |
png_const_charp name, int compression_type, | |
png_const_bytep profile, png_uint_32 proflen) | |
{ | |
png_charp new_iccp_name; | |
png_bytep new_iccp_profile; | |
png_uint_32 length; | |
png_debug1(1, "in %s storage function", "iCCP"); | |
if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) | |
return; | |
length = png_strlen(name)+1; | |
new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); | |
if (new_iccp_name == NULL) | |
{ | |
png_warning(png_ptr, "Insufficient memory to process iCCP chunk"); | |
return; | |
} | |
png_memcpy(new_iccp_name, name, length); | |
new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen); | |
if (new_iccp_profile == NULL) | |
{ | |
png_free (png_ptr, new_iccp_name); | |
png_warning(png_ptr, | |
"Insufficient memory to process iCCP profile"); | |
return; | |
} | |
png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); | |
png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); | |
info_ptr->iccp_proflen = proflen; | |
info_ptr->iccp_name = new_iccp_name; | |
info_ptr->iccp_profile = new_iccp_profile; | |
/* Compression is always zero but is here so the API and info structure | |
* does not have to change if we introduce multiple compression types | |
*/ | |
info_ptr->iccp_compression = (png_byte)compression_type; | |
info_ptr->free_me |= PNG_FREE_ICCP; | |
info_ptr->valid |= PNG_INFO_iCCP; | |
} | |
#endif | |
#ifdef PNG_TEXT_SUPPORTED | |
void PNGAPI | |
png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, | |
int num_text) | |
{ | |
int ret; | |
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); | |
if (ret) | |
png_error(png_ptr, "Insufficient memory to store text"); | |
} | |
int /* PRIVATE */ | |
png_set_text_2(png_structp png_ptr, png_infop info_ptr, | |
png_const_textp text_ptr, int num_text) | |
{ | |
int i; | |
png_debug1(1, "in %s storage function", ((png_ptr == NULL || | |
png_ptr->chunk_name[0] == '\0') ? | |
"text" : (png_const_charp)png_ptr->chunk_name)); | |
if (png_ptr == NULL || info_ptr == NULL || num_text == 0) | |
return(0); | |
/* Make sure we have enough space in the "text" array in info_struct | |
* to hold all of the incoming text_ptr objects. | |
*/ | |
if (info_ptr->num_text + num_text > info_ptr->max_text) | |
{ | |
if (info_ptr->text != NULL) | |
{ | |
png_textp old_text; | |
int old_max; | |
old_max = info_ptr->max_text; | |
info_ptr->max_text = info_ptr->num_text + num_text + 8; | |
old_text = info_ptr->text; | |
info_ptr->text = (png_textp)png_malloc_warn(png_ptr, | |
(png_size_t)(info_ptr->max_text * png_sizeof(png_text))); | |
if (info_ptr->text == NULL) | |
{ | |
png_free(png_ptr, old_text); | |
return(1); | |
} | |
png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * | |
png_sizeof(png_text))); | |
png_free(png_ptr, old_text); | |
} | |
else | |
{ | |
info_ptr->max_text = num_text + 8; | |
info_ptr->num_text = 0; | |
info_ptr->text = (png_textp)png_malloc_warn(png_ptr, | |
(png_size_t)(info_ptr->max_text * png_sizeof(png_text))); | |
if (info_ptr->text == NULL) | |
return(1); | |
info_ptr->free_me |= PNG_FREE_TEXT; | |
} | |
png_debug1(3, "allocated %d entries for info_ptr->text", | |
info_ptr->max_text); | |
} | |
for (i = 0; i < num_text; i++) | |
{ | |
png_size_t text_length, key_len; | |
png_size_t lang_len, lang_key_len; | |
png_textp textp = &(info_ptr->text[info_ptr->num_text]); | |
if (text_ptr[i].key == NULL) | |
continue; | |
if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || | |
text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) | |
{ | |
png_warning(png_ptr, "text compression mode is out of range"); | |
continue; | |
} | |
key_len = png_strlen(text_ptr[i].key); | |
if (text_ptr[i].compression <= 0) | |
{ | |
lang_len = 0; | |
lang_key_len = 0; | |
} | |
else | |
# ifdef PNG_iTXt_SUPPORTED | |
{ | |
/* Set iTXt data */ | |
if (text_ptr[i].lang != NULL) | |
lang_len = png_strlen(text_ptr[i].lang); | |
else | |
lang_len = 0; | |
if (text_ptr[i].lang_key != NULL) | |
lang_key_len = png_strlen(text_ptr[i].lang_key); | |
else | |
lang_key_len = 0; | |
} | |
# else /* PNG_iTXt_SUPPORTED */ | |
{ | |
png_warning(png_ptr, "iTXt chunk not supported"); | |
continue; | |
} | |
# endif | |
if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') | |
{ | |
text_length = 0; | |
# ifdef PNG_iTXt_SUPPORTED | |
if (text_ptr[i].compression > 0) | |
textp->compression = PNG_ITXT_COMPRESSION_NONE; | |
else | |
# endif | |
textp->compression = PNG_TEXT_COMPRESSION_NONE; | |
} | |
else | |
{ | |
text_length = png_strlen(text_ptr[i].text); | |
textp->compression = text_ptr[i].compression; | |
} | |
textp->key = (png_charp)png_malloc_warn(png_ptr, | |
(png_size_t) | |
(key_len + text_length + lang_len + lang_key_len + 4)); | |
if (textp->key == NULL) | |
return(1); | |
png_debug2(2, "Allocated %lu bytes at %p in png_set_text", | |
(unsigned long)(png_uint_32) | |
(key_len + lang_len + lang_key_len + text_length + 4), | |
textp->key); | |
png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len)); | |
*(textp->key + key_len) = '\0'; | |
if (text_ptr[i].compression > 0) | |
{ | |
textp->lang = textp->key + key_len + 1; | |
png_memcpy(textp->lang, text_ptr[i].lang, lang_len); | |
*(textp->lang + lang_len) = '\0'; | |
textp->lang_key = textp->lang + lang_len + 1; | |
png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); | |
*(textp->lang_key + lang_key_len) = '\0'; | |
textp->text = textp->lang_key + lang_key_len + 1; | |
} | |
else | |
{ | |
textp->lang=NULL; | |
textp->lang_key=NULL; | |
textp->text = textp->key + key_len + 1; | |
} | |
if (text_length) | |
png_memcpy(textp->text, text_ptr[i].text, | |
(png_size_t)(text_length)); | |
*(textp->text + text_length) = '\0'; | |
# ifdef PNG_iTXt_SUPPORTED | |
if (textp->compression > 0) | |
{ | |
textp->text_length = 0; | |
textp->itxt_length = text_length; | |
} | |
else | |
# endif | |
{ | |
textp->text_length = text_length; | |
textp->itxt_length = 0; | |
} | |
info_ptr->num_text++; | |
png_debug1(3, "transferred text chunk %d", info_ptr->num_text); | |
} | |
return(0); | |
} | |
#endif | |
#ifdef PNG_tIME_SUPPORTED | |
void PNGAPI | |
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) | |
{ | |
png_debug1(1, "in %s storage function", "tIME"); | |
if (png_ptr == NULL || info_ptr == NULL || | |
(png_ptr->mode & PNG_WROTE_tIME)) | |
return; | |
png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time)); | |
info_ptr->valid |= PNG_INFO_tIME; | |
} | |
#endif | |
#ifdef PNG_tRNS_SUPPORTED | |
void PNGAPI | |
png_set_tRNS(png_structp png_ptr, png_infop info_ptr, | |
png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) | |
{ | |
png_debug1(1, "in %s storage function", "tRNS"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
if (trans_alpha != NULL) | |
{ | |
/* It may not actually be necessary to set png_ptr->trans_alpha here; | |
* we do it for backward compatibility with the way the png_handle_tRNS | |
* function used to do the allocation. | |
*/ | |
png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); | |
/* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ | |
png_ptr->trans_alpha = info_ptr->trans_alpha = | |
(png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH); | |
if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) | |
png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); | |
} | |
if (trans_color != NULL) | |
{ | |
int sample_max = (1 << info_ptr->bit_depth); | |
if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && | |
(int)trans_color->gray > sample_max) || | |
(info_ptr->color_type == PNG_COLOR_TYPE_RGB && | |
((int)trans_color->red > sample_max || | |
(int)trans_color->green > sample_max || | |
(int)trans_color->blue > sample_max))) | |
png_warning(png_ptr, | |
"tRNS chunk has out-of-range samples for bit_depth"); | |
png_memcpy(&(info_ptr->trans_color), trans_color, | |
png_sizeof(png_color_16)); | |
if (num_trans == 0) | |
num_trans = 1; | |
} | |
info_ptr->num_trans = (png_uint_16)num_trans; | |
if (num_trans != 0) | |
{ | |
info_ptr->valid |= PNG_INFO_tRNS; | |
info_ptr->free_me |= PNG_FREE_TRNS; | |
} | |
} | |
#endif | |
#ifdef PNG_sPLT_SUPPORTED | |
void PNGAPI | |
png_set_sPLT(png_structp png_ptr, | |
png_infop info_ptr, png_const_sPLT_tp entries, int nentries) | |
/* | |
* entries - array of png_sPLT_t structures | |
* to be added to the list of palettes | |
* in the info structure. | |
* | |
* nentries - number of palette structures to be | |
* added. | |
*/ | |
{ | |
png_sPLT_tp np; | |
int i; | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
np = (png_sPLT_tp)png_malloc_warn(png_ptr, | |
(info_ptr->splt_palettes_num + nentries) * | |
(png_size_t)png_sizeof(png_sPLT_t)); | |
if (np == NULL) | |
{ | |
png_warning(png_ptr, "No memory for sPLT palettes"); | |
return; | |
} | |
png_memcpy(np, info_ptr->splt_palettes, | |
info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); | |
png_free(png_ptr, info_ptr->splt_palettes); | |
info_ptr->splt_palettes=NULL; | |
for (i = 0; i < nentries; i++) | |
{ | |
png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; | |
png_const_sPLT_tp from = entries + i; | |
png_uint_32 length; | |
length = png_strlen(from->name) + 1; | |
to->name = (png_charp)png_malloc_warn(png_ptr, (png_size_t)length); | |
if (to->name == NULL) | |
{ | |
png_warning(png_ptr, | |
"Out of memory while processing sPLT chunk"); | |
continue; | |
} | |
png_memcpy(to->name, from->name, length); | |
to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, | |
(png_size_t)(from->nentries * png_sizeof(png_sPLT_entry))); | |
if (to->entries == NULL) | |
{ | |
png_warning(png_ptr, | |
"Out of memory while processing sPLT chunk"); | |
png_free(png_ptr, to->name); | |
to->name = NULL; | |
continue; | |
} | |
png_memcpy(to->entries, from->entries, | |
from->nentries * png_sizeof(png_sPLT_entry)); | |
to->nentries = from->nentries; | |
to->depth = from->depth; | |
} | |
info_ptr->splt_palettes = np; | |
info_ptr->splt_palettes_num += nentries; | |
info_ptr->valid |= PNG_INFO_sPLT; | |
info_ptr->free_me |= PNG_FREE_SPLT; | |
} | |
#endif /* PNG_sPLT_SUPPORTED */ | |
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED | |
void PNGAPI | |
png_set_unknown_chunks(png_structp png_ptr, | |
png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) | |
{ | |
png_unknown_chunkp np; | |
int i; | |
if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) | |
return; | |
np = (png_unknown_chunkp)png_malloc_warn(png_ptr, | |
(png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) * | |
png_sizeof(png_unknown_chunk)); | |
if (np == NULL) | |
{ | |
png_warning(png_ptr, | |
"Out of memory while processing unknown chunk"); | |
return; | |
} | |
png_memcpy(np, info_ptr->unknown_chunks, | |
(png_size_t)info_ptr->unknown_chunks_num * | |
png_sizeof(png_unknown_chunk)); | |
png_free(png_ptr, info_ptr->unknown_chunks); | |
info_ptr->unknown_chunks = NULL; | |
for (i = 0; i < num_unknowns; i++) | |
{ | |
png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; | |
png_const_unknown_chunkp from = unknowns + i; | |
png_memcpy(to->name, from->name, png_sizeof(from->name)); | |
to->name[png_sizeof(to->name)-1] = '\0'; | |
to->size = from->size; | |
/* Note our location in the read or write sequence */ | |
to->location = (png_byte)(png_ptr->mode & 0xff); | |
if (from->size == 0) | |
to->data=NULL; | |
else | |
{ | |
to->data = (png_bytep)png_malloc_warn(png_ptr, | |
(png_size_t)from->size); | |
if (to->data == NULL) | |
{ | |
png_warning(png_ptr, | |
"Out of memory while processing unknown chunk"); | |
to->size = 0; | |
} | |
else | |
png_memcpy(to->data, from->data, from->size); | |
} | |
} | |
info_ptr->unknown_chunks = np; | |
info_ptr->unknown_chunks_num += num_unknowns; | |
info_ptr->free_me |= PNG_FREE_UNKN; | |
} | |
void PNGAPI | |
png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, | |
int chunk, int location) | |
{ | |
if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < | |
info_ptr->unknown_chunks_num) | |
info_ptr->unknown_chunks[chunk].location = (png_byte)location; | |
} | |
#endif | |
#ifdef PNG_MNG_FEATURES_SUPPORTED | |
png_uint_32 PNGAPI | |
png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) | |
{ | |
png_debug(1, "in png_permit_mng_features"); | |
if (png_ptr == NULL) | |
return (png_uint_32)0; | |
png_ptr->mng_features_permitted = | |
(png_byte)(mng_features & PNG_ALL_MNG_FEATURES); | |
return (png_uint_32)png_ptr->mng_features_permitted; | |
} | |
#endif | |
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED | |
void PNGAPI | |
png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep | |
chunk_list, int num_chunks) | |
{ | |
png_bytep new_list, p; | |
int i, old_num_chunks; | |
if (png_ptr == NULL) | |
return; | |
if (num_chunks == 0) | |
{ | |
if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) | |
png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; | |
else | |
png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; | |
if (keep == PNG_HANDLE_CHUNK_ALWAYS) | |
png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; | |
else | |
png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; | |
return; | |
} | |
if (chunk_list == NULL) | |
return; | |
old_num_chunks = png_ptr->num_chunk_list; | |
new_list=(png_bytep)png_malloc(png_ptr, | |
(png_size_t)(5*(num_chunks + old_num_chunks))); | |
if (png_ptr->chunk_list != NULL) | |
{ | |
png_memcpy(new_list, png_ptr->chunk_list, | |
(png_size_t)(5*old_num_chunks)); | |
png_free(png_ptr, png_ptr->chunk_list); | |
png_ptr->chunk_list=NULL; | |
} | |
png_memcpy(new_list + 5*old_num_chunks, chunk_list, | |
(png_size_t)(5*num_chunks)); | |
for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5) | |
*p=(png_byte)keep; | |
png_ptr->num_chunk_list = old_num_chunks + num_chunks; | |
png_ptr->chunk_list = new_list; | |
png_ptr->free_me |= PNG_FREE_LIST; | |
} | |
#endif | |
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED | |
void PNGAPI | |
png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, | |
png_user_chunk_ptr read_user_chunk_fn) | |
{ | |
png_debug(1, "in png_set_read_user_chunk_fn"); | |
if (png_ptr == NULL) | |
return; | |
png_ptr->read_user_chunk_fn = read_user_chunk_fn; | |
png_ptr->user_chunk_ptr = user_chunk_ptr; | |
} | |
#endif | |
#ifdef PNG_INFO_IMAGE_SUPPORTED | |
void PNGAPI | |
png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) | |
{ | |
png_debug1(1, "in %s storage function", "rows"); | |
if (png_ptr == NULL || info_ptr == NULL) | |
return; | |
if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) | |
png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); | |
info_ptr->row_pointers = row_pointers; | |
if (row_pointers) | |
info_ptr->valid |= PNG_INFO_IDAT; | |
} | |
#endif | |
void PNGAPI | |
png_set_compression_buffer_size(png_structp png_ptr, png_size_t size) | |
{ | |
if (png_ptr == NULL) | |
return; | |
png_free(png_ptr, png_ptr->zbuf); | |
if (size > ZLIB_IO_MAX) | |
{ | |
png_warning(png_ptr, "Attempt to set buffer size beyond max ignored"); | |
png_ptr->zbuf_size = ZLIB_IO_MAX; | |
size = ZLIB_IO_MAX; /* must fit */ | |
} | |
else | |
png_ptr->zbuf_size = (uInt)size; | |
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); | |
/* The following ensures a relatively safe failure if this gets called while | |
* the buffer is actually in use. | |
*/ | |
png_ptr->zstream.next_out = png_ptr->zbuf; | |
png_ptr->zstream.avail_out = 0; | |
png_ptr->zstream.avail_in = 0; | |
} | |
void PNGAPI | |
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) | |
{ | |
if (png_ptr && info_ptr) | |
info_ptr->valid &= ~mask; | |
} | |
#ifdef PNG_SET_USER_LIMITS_SUPPORTED | |
/* This function was added to libpng 1.2.6 */ | |
void PNGAPI | |
png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, | |
png_uint_32 user_height_max) | |
{ | |
/* Images with dimensions larger than these limits will be | |
* rejected by png_set_IHDR(). To accept any PNG datastream | |
* regardless of dimensions, set both limits to 0x7ffffffL. | |
*/ | |
if (png_ptr == NULL) | |
return; | |
png_ptr->user_width_max = user_width_max; | |
png_ptr->user_height_max = user_height_max; | |
} | |
/* This function was added to libpng 1.4.0 */ | |
void PNGAPI | |
png_set_chunk_cache_max (png_structp png_ptr, | |
png_uint_32 user_chunk_cache_max) | |
{ | |
if (png_ptr) | |
png_ptr->user_chunk_cache_max = user_chunk_cache_max; | |
} | |
/* This function was added to libpng 1.4.1 */ | |
void PNGAPI | |
png_set_chunk_malloc_max (png_structp png_ptr, | |
png_alloc_size_t user_chunk_malloc_max) | |
{ | |
if (png_ptr) | |
png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; | |
} | |
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ | |
#ifdef PNG_BENIGN_ERRORS_SUPPORTED | |
void PNGAPI | |
png_set_benign_errors(png_structp png_ptr, int allowed) | |
{ | |
png_debug(1, "in png_set_benign_errors"); | |
if (allowed) | |
png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; | |
else | |
png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN; | |
} | |
#endif /* PNG_BENIGN_ERRORS_SUPPORTED */ | |
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |