910 lines
27 KiB
C
910 lines
27 KiB
C
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/* pngset.c - storage of image information into info struct
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*
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* libpng 1.0.9beta9 - January 15, 2001
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* For conditions of distribution and use, see copyright notice in png.h
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* Copyright (c) 1998, 1999, 2000, 2001 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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*
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* The functions here are used during reads to store data from the file
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* into the info struct, and during writes to store application data
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* into the info struct for writing into the file. This abstracts the
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* info struct and allows us to change the structure in the future.
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*/
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#define PNG_INTERNAL
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#include "png.h"
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#if defined(PNG_bKGD_SUPPORTED)
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void PNGAPI
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png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
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{
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png_debug1(1, "in %s storage function\n", "bKGD");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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png_memcpy(&(info_ptr->background), background, sizeof(png_color_16));
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info_ptr->valid |= PNG_INFO_bKGD;
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}
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#endif
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#if defined(PNG_cHRM_SUPPORTED)
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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void PNGAPI
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png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
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double white_x, double white_y, double red_x, double red_y,
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double green_x, double green_y, double blue_x, double blue_y)
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{
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png_debug1(1, "in %s storage function\n", "cHRM");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->x_white = (float)white_x;
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info_ptr->y_white = (float)white_y;
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info_ptr->x_red = (float)red_x;
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info_ptr->y_red = (float)red_y;
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info_ptr->x_green = (float)green_x;
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info_ptr->y_green = (float)green_y;
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info_ptr->x_blue = (float)blue_x;
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info_ptr->y_blue = (float)blue_y;
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#ifdef PNG_FIXED_POINT_SUPPORTED
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info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
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info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
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info_ptr->int_x_red = (png_fixed_point)(red_x*100000.+0.5);
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info_ptr->int_y_red = (png_fixed_point)(red_y*100000.+0.5);
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info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
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info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
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info_ptr->int_x_blue = (png_fixed_point)(blue_x*100000.+0.5);
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info_ptr->int_y_blue = (png_fixed_point)(blue_y*100000.+0.5);
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#endif
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info_ptr->valid |= PNG_INFO_cHRM;
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}
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#endif
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#ifdef PNG_FIXED_POINT_SUPPORTED
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void PNGAPI
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png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
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png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
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png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
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png_fixed_point blue_x, png_fixed_point blue_y)
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{
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png_debug1(1, "in %s storage function\n", "cHRM");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->int_x_white = white_x;
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info_ptr->int_y_white = white_y;
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info_ptr->int_x_red = red_x;
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info_ptr->int_y_red = red_y;
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info_ptr->int_x_green = green_x;
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info_ptr->int_y_green = green_y;
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info_ptr->int_x_blue = blue_x;
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info_ptr->int_y_blue = blue_y;
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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info_ptr->x_white = (float)(white_x/100000.);
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info_ptr->y_white = (float)(white_y/100000.);
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info_ptr->x_red = (float)(red_x/100000.);
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info_ptr->y_red = (float)(red_y/100000.);
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info_ptr->x_green = (float)(green_x/100000.);
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info_ptr->y_green = (float)(green_y/100000.);
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info_ptr->x_blue = (float)(blue_x/100000.);
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info_ptr->y_blue = (float)(blue_y/100000.);
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#endif
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info_ptr->valid |= PNG_INFO_cHRM;
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}
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#endif
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#endif
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#if defined(PNG_gAMA_SUPPORTED)
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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void PNGAPI
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png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
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{
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png_debug1(1, "in %s storage function\n", "gAMA");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->gamma = (float)file_gamma;
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#ifdef PNG_FIXED_POINT_SUPPORTED
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info_ptr->int_gamma = (int)(file_gamma*100000.+.5);
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#endif
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info_ptr->valid |= PNG_INFO_gAMA;
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}
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#endif
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#endif
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void PNGAPI
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png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
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int_gamma)
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{
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png_debug1(1, "in %s storage function\n", "gAMA");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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info_ptr->gamma = (float)(int_gamma/100000.);
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#endif
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#ifdef PNG_FIXED_POINT_SUPPORTED
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info_ptr->int_gamma = int_gamma;
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#endif
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info_ptr->valid |= PNG_INFO_gAMA;
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}
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#if defined(PNG_hIST_SUPPORTED)
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void PNGAPI
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png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
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{
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int i;
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png_debug1(1, "in %s storage function\n", "hIST");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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if (info_ptr->num_palette == 0)
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png_warning(png_ptr,
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"Palette size 0, hIST allocation skipped.");
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#ifdef PNG_FREE_ME_SUPPORTED
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png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
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#endif
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png_ptr->hist = (png_uint_16p)png_malloc(png_ptr,
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(png_uint_32)(info_ptr->num_palette * sizeof (png_uint_16)));
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for (i = 0; i < info_ptr->num_palette; i++)
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png_ptr->hist[i] = hist[i];
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info_ptr->hist = png_ptr->hist;
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info_ptr->valid |= PNG_INFO_hIST;
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#ifdef PNG_FREE_ME_SUPPORTED
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info_ptr->free_me |= PNG_FREE_HIST;
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#else
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png_ptr->flags |= PNG_FLAG_FREE_HIST;
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#endif
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}
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#endif
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void PNGAPI
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png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
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png_uint_32 width, png_uint_32 height, int bit_depth,
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int color_type, int interlace_type, int compression_type,
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int filter_type)
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{
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int rowbytes_per_pixel;
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png_debug1(1, "in %s storage function\n", "IHDR");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->width = width;
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info_ptr->height = height;
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info_ptr->bit_depth = (png_byte)bit_depth;
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info_ptr->color_type =(png_byte) color_type;
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info_ptr->compression_type = (png_byte)compression_type;
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info_ptr->filter_type = (png_byte)filter_type;
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info_ptr->interlace_type = (png_byte)interlace_type;
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if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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info_ptr->channels = 1;
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else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
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info_ptr->channels = 3;
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else
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info_ptr->channels = 1;
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if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
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info_ptr->channels++;
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info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
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/* check for overflow */
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rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3;
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if (( width > PNG_MAX_UINT/rowbytes_per_pixel))
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{
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png_warning(png_ptr,
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"Width too large to process image data; rowbytes will overflow.");
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info_ptr->rowbytes = (png_size_t)0;
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}
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else
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info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3;
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}
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#if defined(PNG_oFFs_SUPPORTED)
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void PNGAPI
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png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
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png_int_32 offset_x, png_int_32 offset_y, int unit_type)
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{
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png_debug1(1, "in %s storage function\n", "oFFs");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->x_offset = offset_x;
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info_ptr->y_offset = offset_y;
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info_ptr->offset_unit_type = (png_byte)unit_type;
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info_ptr->valid |= PNG_INFO_oFFs;
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}
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#endif
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#if defined(PNG_pCAL_SUPPORTED)
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void PNGAPI
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png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
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png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
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png_charp units, png_charpp params)
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{
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png_uint_32 length;
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int i;
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png_debug1(1, "in %s storage function\n", "pCAL");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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length = png_strlen(purpose) + 1;
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png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
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info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length);
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png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
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png_debug(3, "storing X0, X1, type, and nparams in info\n");
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info_ptr->pcal_X0 = X0;
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info_ptr->pcal_X1 = X1;
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info_ptr->pcal_type = (png_byte)type;
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info_ptr->pcal_nparams = (png_byte)nparams;
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length = png_strlen(units) + 1;
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png_debug1(3, "allocating units for info (%lu bytes)\n", length);
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info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length);
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png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
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info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr,
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(png_uint_32)((nparams + 1) * sizeof(png_charp)));
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info_ptr->pcal_params[nparams] = NULL;
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for (i = 0; i < nparams; i++)
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{
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length = png_strlen(params[i]) + 1;
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png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
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info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length);
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png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
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}
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info_ptr->valid |= PNG_INFO_pCAL;
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#ifdef PNG_FREE_ME_SUPPORTED
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info_ptr->free_me |= PNG_FREE_PCAL;
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#endif
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}
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#endif
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#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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void PNGAPI
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png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
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int unit, double width, double height)
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{
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png_debug1(1, "in %s storage function\n", "sCAL");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->scal_unit = (png_byte)unit;
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info_ptr->scal_pixel_width = width;
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info_ptr->scal_pixel_height = height;
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info_ptr->valid |= PNG_INFO_sCAL;
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}
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#else
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#ifdef PNG_FIXED_POINT_SUPPORTED
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void PNGAPI
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png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
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int unit, png_charp swidth, png_charp sheight)
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{
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png_uint_32 length;
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png_debug1(1, "in %s storage function\n", "sCAL");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->scal_unit = (png_byte)unit;
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length = png_strlen(swidth) + 1;
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png_debug1(3, "allocating unit for info (%d bytes)\n", length);
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info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length);
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png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
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length = png_strlen(sheight) + 1;
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png_debug1(3, "allocating unit for info (%d bytes)\n", length);
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info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length);
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png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
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info_ptr->valid |= PNG_INFO_sCAL;
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#ifdef PNG_FREE_ME_SUPPORTED
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info_ptr->free_me |= PNG_FREE_SCAL;
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#endif
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}
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#endif
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#endif
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#endif
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#if defined(PNG_pHYs_SUPPORTED)
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void PNGAPI
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png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
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png_uint_32 res_x, png_uint_32 res_y, int unit_type)
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{
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png_debug1(1, "in %s storage function\n", "pHYs");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->x_pixels_per_unit = res_x;
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info_ptr->y_pixels_per_unit = res_y;
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info_ptr->phys_unit_type = (png_byte)unit_type;
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info_ptr->valid |= PNG_INFO_pHYs;
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}
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#endif
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void PNGAPI
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png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
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png_colorp palette, int num_palette)
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{
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png_debug1(1, "in %s storage function\n", "PLTE");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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/*
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* It may not actually be necessary to set png_ptr->palette here;
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* we do it for backward compatibility with the way the png_handle_tRNS
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* function used to do the allocation.
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*/
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#ifdef PNG_FREE_ME_SUPPORTED
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png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
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#endif
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png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)num_palette,
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sizeof (png_color));
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memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color));
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info_ptr->palette = png_ptr->palette;
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info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
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#ifdef PNG_FREE_ME_SUPPORTED
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info_ptr->free_me |= PNG_FREE_PLTE;
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#else
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png_ptr->flags |= PNG_FLAG_FREE_PLTE;
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#endif
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info_ptr->valid |= PNG_INFO_PLTE;
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}
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#if defined(PNG_sBIT_SUPPORTED)
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void PNGAPI
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png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
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png_color_8p sig_bit)
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{
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png_debug1(1, "in %s storage function\n", "sBIT");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8));
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info_ptr->valid |= PNG_INFO_sBIT;
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}
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#endif
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#if defined(PNG_sRGB_SUPPORTED)
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void PNGAPI
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png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
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{
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png_debug1(1, "in %s storage function\n", "sRGB");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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info_ptr->srgb_intent = (png_byte)intent;
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info_ptr->valid |= PNG_INFO_sRGB;
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}
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void PNGAPI
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png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
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int intent)
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{
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#if defined(PNG_gAMA_SUPPORTED)
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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float file_gamma;
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#endif
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#ifdef PNG_FIXED_POINT_SUPPORTED
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png_fixed_point int_file_gamma;
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#endif
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#endif
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#if defined(PNG_cHRM_SUPPORTED)
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
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#endif
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#ifdef PNG_FIXED_POINT_SUPPORTED
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png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
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int_green_y, int_blue_x, int_blue_y;
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#endif
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#endif
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png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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png_set_sRGB(png_ptr, info_ptr, intent);
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#if defined(PNG_gAMA_SUPPORTED)
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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file_gamma = (float).45455;
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png_set_gAMA(png_ptr, info_ptr, file_gamma);
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#endif
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#ifdef PNG_FIXED_POINT_SUPPORTED
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int_file_gamma = 45455L;
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png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
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#endif
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#endif
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#if defined(PNG_cHRM_SUPPORTED)
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#ifdef PNG_FIXED_POINT_SUPPORTED
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int_white_x = 31270L;
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int_white_y = 32900L;
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int_red_x = 64000L;
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int_red_y = 33000L;
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int_green_x = 30000L;
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int_green_y = 60000L;
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int_blue_x = 15000L;
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int_blue_y = 6000L;
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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 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_debug1(1, "in %s storage function\n", "iCCP");
|
|
if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
|
|
return;
|
|
|
|
new_iccp_name = png_malloc(png_ptr, png_strlen(name)+1);
|
|
strcpy(new_iccp_name, name);
|
|
new_iccp_profile = png_malloc(png_ptr, proflen);
|
|
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
|
|
|
|
#if defined(PNG_TEXT_SUPPORTED)
|
|
void PNGAPI
|
|
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)));
|
|
#ifdef PNG_FREE_ME_SUPPORTED
|
|
info_ptr->free_me |= PNG_FREE_TEXT;
|
|
#endif
|
|
}
|
|
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;
|
|
png_size_t 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)
|
|
{
|
|
lang_len = 0;
|
|
lang_key_len = 0;
|
|
}
|
|
else
|
|
#ifdef PNG_iTXt_SUPPORTED
|
|
{
|
|
/* set iTXt data */
|
|
if (text_ptr[i].key != (png_charp)NULL)
|
|
lang_len = png_strlen(text_ptr[i].lang);
|
|
else
|
|
lang_len = 0;
|
|
if (text_ptr[i].lang_key != (png_charp)NULL)
|
|
lang_key_len = png_strlen(text_ptr[i].lang_key);
|
|
else
|
|
lang_key_len = 0;
|
|
}
|
|
#else
|
|
{
|
|
png_warning(png_ptr, "iTXt chunk not supported.");
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
if (text_ptr[i].text == (png_charp)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(png_ptr,
|
|
(png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
|
|
png_debug2(2, "Allocated %d bytes at %x in png_set_text\n",
|
|
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=(png_charp)NULL;
|
|
textp->lang_key=(png_charp)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->text[info_ptr->num_text]= *textp;
|
|
info_ptr->num_text++;
|
|
png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if defined(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\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 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\n", "tRNS");
|
|
if (png_ptr == NULL || info_ptr == NULL)
|
|
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
|
|
png_ptr->trans = info_ptr->trans = png_malloc(png_ptr, num_trans);
|
|
memcpy(info_ptr->trans, trans, num_trans);
|
|
#ifdef PNG_FREE_ME_SUPPORTED
|
|
info_ptr->free_me |= PNG_FREE_TRNS;
|
|
#else
|
|
png_ptr->flags |= PNG_FLAG_FREE_TRNS;
|
|
#endif
|
|
}
|
|
|
|
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 PNGAPI
|
|
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);
|
|
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;
|
|
|
|
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;
|
|
#ifdef PNG_FREE_ME_SUPPORTED
|
|
info_ptr->free_me |= PNG_FREE_SPLT;
|
|
#endif
|
|
}
|
|
#endif /* PNG_sPLT_SUPPORTED */
|
|
|
|
#if defined(PNG_WRITE_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(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);
|
|
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_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;
|
|
#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_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-2.0.0 */
|
|
png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
|
|
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
|
|
|
|
#if defined(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\n");
|
|
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
|
|
|
|
#if defined(PNG_UNKNOWN_CHUNKS_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 (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_ptr->chunk_list=NULL;
|
|
}
|
|
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;
|
|
#ifdef PNG_FREE_ME_SUPPORTED
|
|
png_ptr->free_me |= PNG_FREE_LIST;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
#if defined(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\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 PNGAPI
|
|
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;
|
|
|
|
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->zbuf)
|
|
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);
|
|
if(!png_ptr->zbuf)
|
|
png_error(png_ptr,"Unable to malloc zbuf");
|
|
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);
|
|
}
|
|
|