| |
| /* pngset.c - storage of image information into info struct |
| * |
| * libpng 1.0.6d - April 7, 2000 |
| * For conditions of distribution and use, see copyright notice in png.h |
| * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. |
| * Copyright (c) 1996, 1997 Andreas Dilger |
| * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson |
| * |
| * 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 |
| #include "png.h" |
| |
| #if defined(PNG_bKGD_SUPPORTED) |
| void |
| png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) |
| { |
| png_debug1(1, "in %s storage function\n", "bKGD"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| png_memcpy(&(info_ptr->background), background, sizeof(png_color_16)); |
| info_ptr->valid |= PNG_INFO_bKGD; |
| } |
| #endif |
| |
| #if defined(PNG_cHRM_SUPPORTED) |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| void |
| 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\n", "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 |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| void |
| 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\n", "cHRM"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| 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 |
| #endif |
| |
| #if defined(PNG_gAMA_SUPPORTED) |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| void |
| png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) |
| { |
| png_debug1(1, "in %s storage function\n", "gAMA"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->gamma = (float)file_gamma; |
| #ifdef PNG_FIXED_POINT_SUPPORTED |
| info_ptr->int_gamma = (int)(file_gamma*100000.+.5); |
| #endif |
| info_ptr->valid |= PNG_INFO_gAMA; |
| } |
| #endif |
| #endif |
| void |
| png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point |
| int_gamma) |
| { |
| png_debug1(1, "in %s storage function\n", "gAMA"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| info_ptr->gamma = (float)(int_gamma/100000.); |
| #endif |
| info_ptr->int_gamma = int_gamma; |
| info_ptr->valid |= PNG_INFO_gAMA; |
| } |
| |
| #if defined(PNG_hIST_SUPPORTED) |
| void |
| png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) |
| { |
| png_debug1(1, "in %s storage function\n", "hIST"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->hist = hist; |
| info_ptr->valid |= PNG_INFO_hIST; |
| } |
| #endif |
| |
| void |
| 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) |
| { |
| int rowbytes_per_pixel; |
| png_debug1(1, "in %s storage function\n", "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; |
| 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 overflow */ |
| rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3; |
| if (( width > PNG_MAX_UINT/rowbytes_per_pixel)) |
| { |
| png_warning(png_ptr, |
| "Width too large to process image data; rowbytes will overflow."); |
| info_ptr->rowbytes = (png_size_t)0; |
| } |
| else |
| info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3; |
| } |
| |
| #if defined(PNG_oFFs_SUPPORTED) |
| void |
| 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\n", "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 |
| |
| #if defined(PNG_pCAL_SUPPORTED) |
| void |
| 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\n", "pCAL"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| length = png_strlen(purpose) + 1; |
| png_debug1(3, "allocating purpose for info (%d bytes)\n", length); |
| info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length); |
| png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); |
| |
| png_debug(3, "storing X0, X1, type, and nparams in info\n"); |
| 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 (%d bytes)\n", length); |
| info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length); |
| png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); |
| |
| info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr, |
| (png_uint_32)((nparams + 1) * sizeof(png_charp))); |
| info_ptr->pcal_params[nparams] = NULL; |
| |
| for (i = 0; i < nparams; i++) |
| { |
| length = png_strlen(params[i]) + 1; |
| png_debug2(3, "allocating parameter %d for info (%d bytes)\n", i, length); |
| info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length); |
| png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); |
| } |
| |
| info_ptr->valid |= PNG_INFO_pCAL; |
| } |
| #endif |
| |
| #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) |
| #ifdef PNG_FLOATING_POINT_SUPPORTED |
| void |
| png_set_sCAL(png_structp png_ptr, png_infop info_ptr, |
| int unit, double width, double height) |
| { |
| png_debug1(1, "in %s storage function\n", "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 |
| 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\n", "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 (%d bytes)\n", length); |
| info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length); |
| png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length); |
| |
| length = png_strlen(sheight) + 1; |
| png_debug1(3, "allocating unit for info (%d bytes)\n", length); |
| info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length); |
| png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length); |
| |
| info_ptr->valid |= PNG_INFO_sCAL; |
| } |
| #endif |
| #endif |
| #endif |
| |
| #if defined(PNG_pHYs_SUPPORTED) |
| void |
| 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\n", "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 |
| png_set_PLTE(png_structp png_ptr, png_infop info_ptr, |
| png_colorp palette, int num_palette) |
| { |
| |
| png_debug1(1, "in %s storage function\n", "PLTE"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->palette = palette; |
| |
| info_ptr->num_palette = (png_uint_16)num_palette; |
| info_ptr->valid |= PNG_INFO_PLTE; |
| } |
| |
| #if defined(PNG_sBIT_SUPPORTED) |
| void |
| png_set_sBIT(png_structp png_ptr, png_infop info_ptr, |
| png_color_8p sig_bit) |
| { |
| png_debug1(1, "in %s storage function\n", "sBIT"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8)); |
| info_ptr->valid |= PNG_INFO_sBIT; |
| } |
| #endif |
| |
| #if defined(PNG_sRGB_SUPPORTED) |
| void |
| png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) |
| { |
| png_debug1(1, "in %s storage function\n", "sRGB"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->srgb_intent = (png_byte)intent; |
| info_ptr->valid |= PNG_INFO_sRGB; |
| } |
| |
| void |
| png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, |
| int intent) |
| { |
| #if defined(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 |
| #if defined(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\n", "sRGB_gAMA_and_cHRM"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| png_set_sRGB(png_ptr, info_ptr, intent); |
| |
| #if defined(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 |
| |
| #if defined(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 |
| } |
| #endif |
| |
| |
| #if defined(PNG_iCCP_SUPPORTED) |
| void |
| 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_debug1(1, "in %s storage function\n", "iCCP"); |
| if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) |
| return; |
| |
| info_ptr->iccp_name = png_malloc(png_ptr, png_strlen(name)+1); |
| strcpy(info_ptr->iccp_name, name); |
| info_ptr->iccp_profile = png_malloc(png_ptr, proflen); |
| png_memcpy(info_ptr->iccp_profile, profile, (png_size_t)proflen); |
| info_ptr->iccp_proflen = proflen; |
| /* 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 |
| |
| #if defined(PNG_TEXT_SUPPORTED) |
| void |
| png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, |
| int num_text) |
| { |
| int i; |
| |
| png_debug1(1, "in %s storage function\n", (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; |
| |
| /* 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(png_ptr, |
| (png_uint_32)(info_ptr->max_text * sizeof (png_text))); |
| png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * |
| 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(png_ptr, |
| (png_uint_32)(info_ptr->max_text * sizeof (png_text))); |
| } |
| png_debug1(3, "allocated %d entries for info_ptr->text\n", |
| info_ptr->max_text); |
| } |
| |
| for (i = 0; i < num_text; i++) |
| { |
| png_size_t text_length,key_len,lang_len,lang_key_len; |
| png_textp textp = &(info_ptr->text[info_ptr->num_text]); |
| |
| if (text_ptr[i].key == (png_charp)NULL) |
| continue; |
| |
| key_len = png_strlen(text_ptr[i].key); |
| |
| if(text_ptr[i].compression > 0) |
| { |
| /* set iTXt data */ |
| lang_len = png_strlen(text_ptr[i].lang); |
| lang_key_len = png_strlen(text_ptr[i].lang_key); |
| } |
| else |
| { |
| lang_len = 0; |
| lang_key_len = 0; |
| } |
| |
| if (text_ptr[i].text[0] == '\0') |
| { |
| text_length = 0; |
| if(text_ptr[i].compression > 0) |
| textp->compression = PNG_ITXT_COMPRESSION_NONE; |
| else |
| 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(png_ptr, |
| (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4)); |
| png_debug2(2, "Allocated %d bytes at %x in png_set_text\n", |
| 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'; |
| } |
| else |
| textp->text--; |
| |
| if(textp->compression > 0) |
| { |
| textp->text_length = 0; |
| textp->itxt_length = text_length; |
| } |
| else |
| { |
| textp->text_length = text_length; |
| textp->itxt_length = 0; |
| } |
| |
| info_ptr->text[info_ptr->num_text]= *textp; |
| info_ptr->num_text++; |
| info_ptr->free_me |= PNG_FREE_TEXT; |
| png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); |
| } |
| } |
| #endif |
| |
| #if defined(PNG_tIME_SUPPORTED) |
| void |
| png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) |
| { |
| png_debug1(1, "in %s storage function\n", "tIME"); |
| if (png_ptr == NULL || info_ptr == NULL || |
| (png_ptr->mode & PNG_WROTE_tIME)) |
| return; |
| |
| png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time)); |
| info_ptr->valid |= PNG_INFO_tIME; |
| } |
| #endif |
| |
| #if defined(PNG_tRNS_SUPPORTED) |
| void |
| 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\n", "tRNS"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| if (trans != NULL) |
| info_ptr->trans = trans; |
| |
| if (trans_values != NULL) |
| { |
| png_memcpy(&(info_ptr->trans_values), trans_values, |
| sizeof(png_color_16)); |
| if (num_trans == 0) |
| num_trans = 1; |
| } |
| info_ptr->num_trans = (png_uint_16)num_trans; |
| info_ptr->valid |= PNG_INFO_tRNS; |
| } |
| #endif |
| |
| #if defined(PNG_sPLT_SUPPORTED) |
| void |
| png_set_sPLT(png_structp png_ptr, |
| png_infop info_ptr, png_sPLT_tp entries, int nentries) |
| { |
| png_sPLT_tp np; |
| int i; |
| |
| np = (png_sPLT_tp)png_malloc(png_ptr, |
| (info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t)); |
| |
| png_memcpy(np, info_ptr->splt_palettes, |
| info_ptr->splt_palettes_num * sizeof(png_sPLT_t)); |
| png_free(png_ptr, info_ptr->splt_palettes); |
| |
| for (i = 0; i < nentries; i++) |
| { |
| png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; |
| png_sPLT_tp from = entries + i; |
| |
| to->name = (png_charp)png_malloc(png_ptr, |
| png_strlen(from->name) + 1); |
| png_strcpy(to->name, from->name); |
| to->entries = (png_sPLT_entryp)png_malloc(png_ptr, |
| from->nentries * sizeof(png_sPLT_t)); |
| png_memcpy(to->entries, from->entries, |
| from->nentries * sizeof(png_sPLT_t)); |
| 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 */ |
| |
| #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) |
| void |
| 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(png_ptr, |
| (info_ptr->unknown_chunks_num + num_unknowns) * |
| sizeof(png_unknown_chunk)); |
| |
| png_memcpy(np, info_ptr->unknown_chunks, |
| info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk)); |
| png_free(png_ptr, info_ptr->unknown_chunks); |
| |
| 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_strcpy((png_charp)to->name, (png_charp)from->name); |
| to->data = (png_bytep)png_malloc(png_ptr, from->size); |
| png_memcpy(to->data, from->data, from->size); |
| to->size = from->size; |
| |
| /* note our location in the read or write sequence */ |
| to->location = (png_byte)(png_ptr->mode & 0xff); |
| } |
| |
| info_ptr->unknown_chunks = np; |
| info_ptr->unknown_chunks_num += num_unknowns; |
| info_ptr->free_me |= PNG_FREE_UNKN; |
| } |
| #endif |
| |
| #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ |
| defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) |
| void |
| png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) |
| { |
| png_debug1(1, "in png_permit_empty_plte\n", ""); |
| if (png_ptr == NULL) |
| return; |
| png_ptr->empty_plte_permitted=(png_byte)empty_plte_permitted; |
| } |
| #endif |
| |
| #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
| void |
| 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 (num_chunks == 0) |
| { |
| if(keep == HANDLE_CHUNK_ALWAYS || keep == HANDLE_CHUNK_IF_SAFE) |
| png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; |
| else |
| png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; |
| |
| if(keep == 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_malloc(png_ptr,5*(num_chunks+old_num_chunks)); |
| if(png_ptr->chunk_list != (png_bytep)NULL) |
| { |
| png_memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); |
| png_free(png_ptr, png_ptr->chunk_list); |
| } |
| png_memcpy(new_list+5*old_num_chunks, chunk_list, 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 |
| |
| #if defined(PNG_READ_USER_CHUNKS_SUPPORTED) |
| void |
| 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\n"); |
| png_ptr->read_user_chunk_fn = read_user_chunk_fn; |
| png_ptr->user_chunk_ptr = user_chunk_ptr; |
| } |
| #endif |
| |
| #if defined(PNG_INFO_IMAGE_SUPPORTED) |
| void |
| png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) |
| { |
| png_debug1(1, "in %s storage function\n", "rows"); |
| if (png_ptr == NULL || info_ptr == NULL) |
| return; |
| |
| info_ptr->row_pointers = row_pointers; |
| info_ptr->free_me |= PNG_FREE_ROWS; |
| } |
| #endif |
| |