/* pngset.c - storage of image information into info struct * * Last changed in libpng 1.2.54 [November 12, 2015] * Copyright (c) 1998-2015 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_INTERNAL #define PNG_NO_PEDANTIC_WARNINGS #include "png.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_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; } #ifdef PNG_FREE_ME_SUPPORTED png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); #endif /* 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_uint_32)(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; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_HIST; #else png_ptr->flags |= PNG_FLAG_FREE_HIST; #endif } #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 = (png_size_t)0; png_error(png_ptr, "Image width is too large for this architecture"); } 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_uint_32 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, (png_size_t)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, (png_size_t)length); info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, (png_uint_32)((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], (png_size_t)length); } info_ptr->valid |= PNG_INFO_pCAL; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_PCAL; #endif } #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_uint_32 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, (png_size_t)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, (png_size_t)length); info_ptr->valid |= PNG_INFO_sCAL; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_SCAL; #endif } #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_uint_32 max_palette_length; png_debug1(1, "in %s storage function", "PLTE"); if (png_ptr == NULL || info_ptr == NULL) return; max_palette_length = (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ? (1 << info_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH; if (num_palette < 0 || num_palette > (int) 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. */ #ifdef PNG_FREE_ME_SUPPORTED png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); #endif /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead * of num_palette entries, in case of an invalid PNG file or incorrect * call to png_set_PLTE() with 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; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_PLTE; #else png_ptr->flags |= PNG_FLAG_FREE_PLTE; #endif 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 #ifdef PNG_FIXED_POINT_SUPPORTED 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 #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 # ifdef PNG_FIXED_POINT_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; 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 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; 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; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_ICCP; #endif 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) { int old_max_text = info_ptr->max_text; int old_num_text = info_ptr->num_text; if (info_ptr->text != NULL) { png_textp old_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_uint_32)(info_ptr->max_text * png_sizeof(png_text))); if (info_ptr->text == NULL) { /* Restore to previous condition */ info_ptr->max_text = old_max_text; info_ptr->text = old_text; return(1); } png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text * 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_uint_32)(info_ptr->max_text * png_sizeof(png_text))); if (info_ptr->text == NULL) { /* Restore to previous condition */ info_ptr->num_text = old_num_text; info_ptr->max_text = old_max_text; return(1); } #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_TEXT; #endif } 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_uint_32) (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", (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'; #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; if (mod_time->month == 0 || mod_time->month > 12 || mod_time->day == 0 || mod_time->day > 31 || mod_time->hour > 23 || mod_time->minute > 59 || mod_time->second > 60) { png_warning(png_ptr, "Ignoring invalid time value"); 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, int num_trans, png_color_16p trans_values) { png_debug1(1, "in %s storage function", "tRNS"); if (png_ptr == NULL || info_ptr == NULL) return; if (num_trans < 0 || num_trans > PNG_MAX_PALETTE_LENGTH) { png_warning(png_ptr, "Ignoring invalid num_trans value"); return; } if (trans != NULL) { /* It may not actually be necessary to set png_ptr->trans here; * we do it for backward compatibility with the way the png_handle_tRNS * function used to do the allocation. */ #ifdef PNG_FREE_ME_SUPPORTED png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); #endif /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr, (png_uint_32)PNG_MAX_PALETTE_LENGTH); if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans); } if (trans_values != NULL) { int sample_max = (1 << info_ptr->bit_depth); if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && (int)trans_values->gray > sample_max) || (info_ptr->color_type == PNG_COLOR_TYPE_RGB && ((int)trans_values->red > sample_max || (int)trans_values->green > sample_max || (int)trans_values->blue > sample_max))) png_warning(png_ptr, "tRNS chunk has out-of-range samples for bit_depth"); png_memcpy(&(info_ptr->trans_values), trans_values, 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; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_TRNS; #else png_ptr->flags |= PNG_FLAG_FREE_TRNS; #endif } } #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_uint_32)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, 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_uint_32)(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; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_SPLT; #endif } #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_uint_32)((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_uint_32)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; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_UNKN; #endif } 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 #if defined(PNG_1_0_X) || defined(PNG_1_2_X) #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) void PNGAPI png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) { /* This function is deprecated in favor of png_permit_mng_features() and will be removed from libpng-1.3.0 */ png_debug(1, "in png_permit_empty_plte, DEPRECATED."); if (png_ptr == NULL) return; png_ptr->mng_features_permitted = (png_byte) ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) | ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE))); } #endif #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_uint_32) (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; inum_chunk_list = old_num_chunks + num_chunks; png_ptr->chunk_list = new_list; #ifdef PNG_FREE_ME_SUPPORTED png_ptr->free_me |= PNG_FREE_LIST; #endif } #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_uint_32 size) { if (png_ptr == NULL) return; png_free(png_ptr, png_ptr->zbuf); png_ptr->zbuf_size = (png_size_t)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; } #ifndef PNG_1_0_X #ifdef PNG_ASSEMBLER_CODE_SUPPORTED /* Function was added to libpng 1.2.0 and should always exist by default */ void PNGAPI png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags) { /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ if (png_ptr != NULL) png_ptr->asm_flags = 0; PNG_UNUSED(asm_flags) /* Quiet the compiler */ } /* This function was added to libpng 1.2.0 */ void PNGAPI png_set_mmx_thresholds (png_structp png_ptr, png_byte mmx_bitdepth_threshold, png_uint_32 mmx_rowbytes_threshold) { /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ if (png_ptr == NULL) return; /* Quiet the compiler */ PNG_UNUSED(mmx_bitdepth_threshold) PNG_UNUSED(mmx_rowbytes_threshold) } #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ #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 0x7fffffffL. */ if (png_ptr == NULL) return; png_ptr->user_width_max = user_width_max; png_ptr->user_height_max = user_height_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_1_0_X */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */