| |
| /* pngset.c - storage of image information into info struct |
| * |
| * Last changed in libpng 1.4.1 [February 25, 2010] |
| * Copyright (c) 1998-2010 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. |
| */ |
| |
| #define PNG_NO_PEDANTIC_WARNINGS |
| #include "png.h" |
| #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| #include "pngpriv.h" |
| |
| #ifdef PNG_bKGD_SUPPORTED |
| void PNGAPI |
| png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_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 |
| #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_debug1(1, "in %s storage function", "cHRM"); |
| |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->x_white = (float)white_x; |
| info_ptr->y_white = (float)white_y; |
| info_ptr->x_red = (float)red_x; |
| info_ptr->y_red = (float)red_y; |
| info_ptr->x_green = (float)green_x; |
| info_ptr->y_green = (float)green_y; |
| info_ptr->x_blue = (float)blue_x; |
| info_ptr->y_blue = (float)blue_y; |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5); |
| info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5); |
| info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5); |
| info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5); |
| info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5); |
| info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5); |
| info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5); |
| info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5); |
| #endif |
| info_ptr->valid |= PNG_INFO_cHRM; |
| } |
| #endif /* PNG_FLOATING_POINT_SUPPORTED */ |
| |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| void PNGAPI |
| 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->int_x_white = white_x; |
| info_ptr->int_y_white = white_y; |
| info_ptr->int_x_red = red_x; |
| info_ptr->int_y_red = red_y; |
| info_ptr->int_x_green = green_x; |
| info_ptr->int_y_green = green_y; |
| info_ptr->int_x_blue = blue_x; |
| info_ptr->int_y_blue = blue_y; |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| info_ptr->x_white = (float)(white_x/100000.); |
| info_ptr->y_white = (float)(white_y/100000.); |
| info_ptr->x_red = (float)( red_x/100000.); |
| info_ptr->y_red = (float)( red_y/100000.); |
| info_ptr->x_green = (float)(green_x/100000.); |
| info_ptr->y_green = (float)(green_y/100000.); |
| info_ptr->x_blue = (float)( blue_x/100000.); |
| info_ptr->y_blue = (float)( blue_y/100000.); |
| #endif |
| info_ptr->valid |= PNG_INFO_cHRM; |
| } |
| } |
| #endif /* PNG_FIXED_POINT_SUPPORTED */ |
| #endif /* PNG_cHRM_SUPPORTED */ |
| |
| #ifdef PNG_gAMA_SUPPORTED |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| void PNGAPI |
| png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) |
| { |
| double png_gamma; |
| |
| png_debug1(1, "in %s storage function", "gAMA"); |
| |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| /* Check for overflow */ |
| if (file_gamma > 21474.83) |
| { |
| png_warning(png_ptr, "Limiting gamma to 21474.83"); |
| png_gamma=21474.83; |
| } |
| else |
| png_gamma = file_gamma; |
| info_ptr->gamma = (float)png_gamma; |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| info_ptr->int_gamma = (int)(png_gamma*100000.+.5); |
| #endif |
| info_ptr->valid |= PNG_INFO_gAMA; |
| if (png_gamma == 0.0) |
| png_warning(png_ptr, "Setting gamma=0"); |
| } |
| #endif |
| void PNGAPI |
| png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point |
| int_gamma) |
| { |
| png_fixed_point png_gamma; |
| |
| png_debug1(1, "in %s storage function", "gAMA"); |
| |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX) |
| { |
| png_warning(png_ptr, "Limiting gamma to 21474.83"); |
| png_gamma=PNG_UINT_31_MAX; |
| } |
| else |
| { |
| if (int_gamma < 0) |
| { |
| png_warning(png_ptr, "Setting negative gamma to zero"); |
| png_gamma = 0; |
| } |
| else |
| png_gamma = int_gamma; |
| } |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| info_ptr->gamma = (float)(png_gamma/100000.); |
| #endif |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| info_ptr->int_gamma = png_gamma; |
| #endif |
| info_ptr->valid |= PNG_INFO_gAMA; |
| if (png_gamma == 0) |
| png_warning(png_ptr, "Setting gamma=0"); |
| } |
| #endif |
| |
| #ifdef PNG_hIST_SUPPORTED |
| void PNGAPI |
| png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_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 RGBA pixels */ |
| - 64 /* 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_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, |
| png_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); |
| 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 |
| |
| #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) |
| #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"); |
| |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->scal_unit = (png_byte)unit; |
| info_ptr->scal_pixel_width = width; |
| info_ptr->scal_pixel_height = height; |
| |
| info_ptr->valid |= PNG_INFO_sCAL; |
| } |
| #else |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| void PNGAPI |
| png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, |
| int unit, png_charp swidth, png_charp sheight) |
| { |
| png_size_t length; |
| |
| png_debug1(1, "in %s storage function", "sCAL"); |
| |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->scal_unit = (png_byte)unit; |
| |
| length = png_strlen(swidth) + 1; |
| png_debug1(3, "allocating unit for info (%u bytes)", |
| (unsigned int)length); |
| info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length); |
| 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, length); |
| |
| length = png_strlen(sheight) + 1; |
| png_debug1(3, "allocating unit for info (%u bytes)", |
| (unsigned int)length); |
| info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length); |
| 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, length); |
| info_ptr->valid |= PNG_INFO_sCAL; |
| info_ptr->free_me |= PNG_FREE_SCAL; |
| } |
| #endif |
| #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_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_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 intent) |
| { |
| png_debug1(1, "in %s storage function", "sRGB"); |
| |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->srgb_intent = (png_byte)intent; |
| info_ptr->valid |= PNG_INFO_sRGB; |
| } |
| |
| void PNGAPI |
| png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, |
| int intent) |
| { |
| #ifdef PNG_gAMA_SUPPORTED |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| float file_gamma; |
| #endif |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| png_fixed_point int_file_gamma; |
| #endif |
| #endif |
| #ifdef PNG_cHRM_SUPPORTED |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; |
| #endif |
| png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, |
| int_green_y, int_blue_x, int_blue_y; |
| #endif |
| 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, intent); |
| |
| #ifdef PNG_gAMA_SUPPORTED |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| file_gamma = (float).45455; |
| png_set_gAMA(png_ptr, info_ptr, file_gamma); |
| #endif |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| int_file_gamma = 45455L; |
| png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); |
| #endif |
| #endif |
| |
| #ifdef PNG_cHRM_SUPPORTED |
| int_white_x = 31270L; |
| int_white_y = 32900L; |
| int_red_x = 64000L; |
| int_red_y = 33000L; |
| int_green_x = 30000L; |
| int_green_y = 60000L; |
| int_blue_x = 15000L; |
| int_blue_y = 6000L; |
| |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| white_x = (float).3127; |
| white_y = (float).3290; |
| red_x = (float).64; |
| red_y = (float).33; |
| green_x = (float).30; |
| green_y = (float).60; |
| blue_x = (float).15; |
| blue_y = (float).06; |
| #endif |
| |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| png_set_cHRM_fixed(png_ptr, info_ptr, |
| int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, |
| int_green_y, int_blue_x, int_blue_y); |
| #endif |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| png_set_cHRM(png_ptr, info_ptr, |
| white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); |
| #endif |
| #endif /* cHRM */ |
| } |
| #endif /* sRGB */ |
| |
| |
| #ifdef PNG_iCCP_SUPPORTED |
| void PNGAPI |
| png_set_iCCP(png_structp png_ptr, png_infop info_ptr, |
| png_charp name, int compression_type, |
| png_charp profile, png_uint_32 proflen) |
| { |
| png_charp new_iccp_name; |
| png_charp 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_charp)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_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_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; |
| |
| 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 %x in png_set_text", |
| (unsigned long)(png_uint_32) |
| (key_len + lang_len + lang_key_len + text_length + 4), |
| (int)textp->key); |
| |
| png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len)); |
| *(textp->key + key_len) = '\0'; |
| #ifdef PNG_iTXt_SUPPORTED |
| 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 |
| #endif |
| { |
| #ifdef PNG_iTXt_SUPPORTED |
| textp->lang=NULL; |
| textp->lang_key=NULL; |
| #endif |
| 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; |
| #ifdef PNG_iTXt_SUPPORTED |
| textp->itxt_length = 0; |
| #endif |
| } |
| 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_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_bytep trans_alpha, int num_trans, png_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_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_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_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, |
| 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_unknown_chunkp from = unknowns + i; |
| |
| png_memcpy((png_charp)to->name, (png_charp)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 < |
| (int)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_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); |
| png_ptr->zbuf_size = size; |
| png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); |
| png_ptr->zstream.next_out = png_ptr->zbuf; |
| png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; |
| } |
| |
| 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 = |
| (png_size_t)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 */ |