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/* pngset.c - storage of image information into info struct
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*
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* libpng 1.2.8 - December 3, 2004
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* For conditions of distribution and use, see copyright notice in png.h
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* Copyright (c) 1998-2004 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, png_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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if (white_x < 0.0 || white_y < 0.0 ||
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red_x < 0.0 || red_y < 0.0 ||
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green_x < 0.0 || green_y < 0.0 ||
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blue_x < 0.0 || blue_y < 0.0)
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{
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png_warning(png_ptr,
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"Ignoring attempt to set negative chromaticity value");
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return;
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}
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if (white_x > 21474.83 || white_y > 21474.83 ||
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red_x > 21474.83 || red_y > 21474.83 ||
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green_x > 21474.83 || green_y > 21474.83 ||
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blue_x > 21474.83 || blue_y > 21474.83)
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{
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png_warning(png_ptr,
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"Ignoring attempt to set chromaticity value exceeding 21474.83");
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return;
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}
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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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if (white_x < 0 || white_y < 0 ||
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red_x < 0 || red_y < 0 ||
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green_x < 0 || green_y < 0 ||
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blue_x < 0 || blue_y < 0)
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{
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png_warning(png_ptr,
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"Ignoring attempt to set negative chromaticity value");
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return;
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}
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if (white_x > (double) PNG_UINT_31_MAX ||
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white_y > (double) PNG_UINT_31_MAX ||
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red_x > (double) PNG_UINT_31_MAX ||
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red_y > (double) PNG_UINT_31_MAX ||
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green_x > (double) PNG_UINT_31_MAX ||
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green_y > (double) PNG_UINT_31_MAX ||
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blue_x > (double) PNG_UINT_31_MAX ||
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blue_y > (double) PNG_UINT_31_MAX)
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{
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png_warning(png_ptr,
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"Ignoring attempt to set chromaticity value exceeding 21474.83");
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return;
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}
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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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double gamma;
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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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/* Check for overflow */
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if (file_gamma > 21474.83)
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{
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png_warning(png_ptr, "Limiting gamma to 21474.83");
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gamma=21474.83;
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}
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else
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gamma=file_gamma;
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info_ptr->gamma = (float)gamma;
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#ifdef PNG_FIXED_POINT_SUPPORTED
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info_ptr->int_gamma = (int)(gamma*100000.+.5);
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#endif
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info_ptr->valid |= PNG_INFO_gAMA;
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if(gamma == 0.0)
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png_warning(png_ptr, "Setting gamma=0");
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}
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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_fixed_point gamma;
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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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if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
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{
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png_warning(png_ptr, "Limiting gamma to 21474.83");
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gamma=PNG_UINT_31_MAX;
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}
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else
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{
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if (int_gamma < 0)
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{
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png_warning(png_ptr, "Setting negative gamma to zero");
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gamma=0;
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}
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else
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gamma=int_gamma;
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}
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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info_ptr->gamma = (float)(gamma/100000.);
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#endif
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#ifdef PNG_FIXED_POINT_SUPPORTED
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info_ptr->int_gamma = gamma;
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#endif
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info_ptr->valid |= PNG_INFO_gAMA;
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if(gamma == 0)
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png_warning(png_ptr, "Setting gamma=0");
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}
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#endif
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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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{
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png_warning(png_ptr,
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"Palette size 0, hIST allocation skipped.");
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return;
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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_HIST, 0);
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#endif
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/* Changed from info->num_palette to 256 in version 1.2.1 */
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png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
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(png_uint_32)(256 * png_sizeof (png_uint_16)));
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if (png_ptr->hist == NULL)
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{
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png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
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return;
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}
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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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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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/* check for width and height valid values */
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if (width == 0 || height == 0)
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png_error(png_ptr, "Image width or height is zero in IHDR");
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#ifdef PNG_SET_USER_LIMITS_SUPPORTED
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if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
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png_error(png_ptr, "image size exceeds user limits in IHDR");
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#else
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if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
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png_error(png_ptr, "image size exceeds user limits in IHDR");
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#endif
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if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
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png_error(png_ptr, "Invalid image size in IHDR");
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if ( width > (PNG_UINT_32_MAX
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>> 3) /* 8-byte RGBA pixels */
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- 64 /* bigrowbuf hack */
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- 1 /* filter byte */
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- 7*8 /* rounding of width to multiple of 8 pixels */
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- 8) /* extra max_pixel_depth pad */
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png_warning(png_ptr, "Width is too large for libpng to process pixels");
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/* check other values */
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if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
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bit_depth != 8 && bit_depth != 16)
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png_error(png_ptr, "Invalid bit depth in IHDR");
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if (color_type < 0 || color_type == 1 ||
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color_type == 5 || color_type > 6)
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png_error(png_ptr, "Invalid color type in IHDR");
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if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
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((color_type == PNG_COLOR_TYPE_RGB ||
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color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
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color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
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png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
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288 |
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if (interlace_type >= PNG_INTERLACE_LAST)
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png_error(png_ptr, "Unknown interlace method in IHDR");
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291 |
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if (compression_type != PNG_COMPRESSION_TYPE_BASE)
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png_error(png_ptr, "Unknown compression method in IHDR");
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#if defined(PNG_MNG_FEATURES_SUPPORTED)
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/* Accept filter_method 64 (intrapixel differencing) only if
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* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
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* 2. Libpng did not read a PNG signature (this filter_method is only
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* used in PNG datastreams that are embedded in MNG datastreams) and
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* 3. The application called png_permit_mng_features with a mask that
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* included PNG_FLAG_MNG_FILTER_64 and
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* 4. The filter_method is 64 and
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* 5. The color_type is RGB or RGBA
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*/
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if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
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png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
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if(filter_type != PNG_FILTER_TYPE_BASE)
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{
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309 |
if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
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310 |
(filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
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((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
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(color_type == PNG_COLOR_TYPE_RGB ||
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color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
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314 |
png_error(png_ptr, "Unknown filter method in IHDR");
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315 |
if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
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316 |
png_warning(png_ptr, "Invalid filter method in IHDR");
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317 |
}
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|
318 |
#else
|
|
|
319 |
if(filter_type != PNG_FILTER_TYPE_BASE)
|
|
|
320 |
png_error(png_ptr, "Unknown filter method in IHDR");
|
|
|
321 |
#endif
|
|
|
322 |
|
|
|
323 |
info_ptr->width = width;
|
|
|
324 |
info_ptr->height = height;
|
|
|
325 |
info_ptr->bit_depth = (png_byte)bit_depth;
|
|
|
326 |
info_ptr->color_type =(png_byte) color_type;
|
|
|
327 |
info_ptr->compression_type = (png_byte)compression_type;
|
|
|
328 |
info_ptr->filter_type = (png_byte)filter_type;
|
|
|
329 |
info_ptr->interlace_type = (png_byte)interlace_type;
|
|
|
330 |
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
|
|
331 |
info_ptr->channels = 1;
|
|
|
332 |
else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
|
|
|
333 |
info_ptr->channels = 3;
|
|
|
334 |
else
|
|
|
335 |
info_ptr->channels = 1;
|
|
|
336 |
if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
|
|
|
337 |
info_ptr->channels++;
|
|
|
338 |
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
|
|
|
339 |
|
|
|
340 |
/* check for potential overflow */
|
|
|
341 |
if ( width > (PNG_UINT_32_MAX
|
|
|
342 |
>> 3) /* 8-byte RGBA pixels */
|
|
|
343 |
- 64 /* bigrowbuf hack */
|
|
|
344 |
- 1 /* filter byte */
|
|
|
345 |
- 7*8 /* rounding of width to multiple of 8 pixels */
|
|
|
346 |
- 8) /* extra max_pixel_depth pad */
|
|
|
347 |
info_ptr->rowbytes = (png_size_t)0;
|
|
|
348 |
else
|
|
|
349 |
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width);
|
|
|
350 |
}
|
|
|
351 |
|
|
|
352 |
#if defined(PNG_oFFs_SUPPORTED)
|
|
|
353 |
void PNGAPI
|
|
|
354 |
png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
|
|
|
355 |
png_int_32 offset_x, png_int_32 offset_y, int unit_type)
|
|
|
356 |
{
|
|
|
357 |
png_debug1(1, "in %s storage function\n", "oFFs");
|
|
|
358 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
359 |
return;
|
|
|
360 |
|
|
|
361 |
info_ptr->x_offset = offset_x;
|
|
|
362 |
info_ptr->y_offset = offset_y;
|
|
|
363 |
info_ptr->offset_unit_type = (png_byte)unit_type;
|
|
|
364 |
info_ptr->valid |= PNG_INFO_oFFs;
|
|
|
365 |
}
|
|
|
366 |
#endif
|
|
|
367 |
|
|
|
368 |
#if defined(PNG_pCAL_SUPPORTED)
|
|
|
369 |
void PNGAPI
|
|
|
370 |
png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
|
|
|
371 |
png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
|
|
|
372 |
png_charp units, png_charpp params)
|
|
|
373 |
{
|
|
|
374 |
png_uint_32 length;
|
|
|
375 |
int i;
|
|
|
376 |
|
|
|
377 |
png_debug1(1, "in %s storage function\n", "pCAL");
|
|
|
378 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
379 |
return;
|
|
|
380 |
|
|
|
381 |
length = png_strlen(purpose) + 1;
|
|
|
382 |
png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
|
|
|
383 |
info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
|
|
|
384 |
if (info_ptr->pcal_purpose == NULL)
|
|
|
385 |
{
|
|
|
386 |
png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
|
|
|
387 |
return;
|
|
|
388 |
}
|
|
|
389 |
png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
|
|
|
390 |
|
|
|
391 |
png_debug(3, "storing X0, X1, type, and nparams in info\n");
|
|
|
392 |
info_ptr->pcal_X0 = X0;
|
|
|
393 |
info_ptr->pcal_X1 = X1;
|
|
|
394 |
info_ptr->pcal_type = (png_byte)type;
|
|
|
395 |
info_ptr->pcal_nparams = (png_byte)nparams;
|
|
|
396 |
|
|
|
397 |
length = png_strlen(units) + 1;
|
|
|
398 |
png_debug1(3, "allocating units for info (%lu bytes)\n", length);
|
|
|
399 |
info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
|
|
|
400 |
if (info_ptr->pcal_units == NULL)
|
|
|
401 |
{
|
|
|
402 |
png_warning(png_ptr, "Insufficient memory for pCAL units.");
|
|
|
403 |
return;
|
|
|
404 |
}
|
|
|
405 |
png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
|
|
|
406 |
|
|
|
407 |
info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
|
|
|
408 |
(png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
|
|
|
409 |
if (info_ptr->pcal_params == NULL)
|
|
|
410 |
{
|
|
|
411 |
png_warning(png_ptr, "Insufficient memory for pCAL params.");
|
|
|
412 |
return;
|
|
|
413 |
}
|
|
|
414 |
|
|
|
415 |
info_ptr->pcal_params[nparams] = NULL;
|
|
|
416 |
|
|
|
417 |
for (i = 0; i < nparams; i++)
|
|
|
418 |
{
|
|
|
419 |
length = png_strlen(params[i]) + 1;
|
|
|
420 |
png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
|
|
|
421 |
info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
|
|
|
422 |
if (info_ptr->pcal_params[i] == NULL)
|
|
|
423 |
{
|
|
|
424 |
png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
|
|
|
425 |
return;
|
|
|
426 |
}
|
|
|
427 |
png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
|
|
|
428 |
}
|
|
|
429 |
|
|
|
430 |
info_ptr->valid |= PNG_INFO_pCAL;
|
|
|
431 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
432 |
info_ptr->free_me |= PNG_FREE_PCAL;
|
|
|
433 |
#endif
|
|
|
434 |
}
|
|
|
435 |
#endif
|
|
|
436 |
|
|
|
437 |
#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
|
|
|
438 |
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
439 |
void PNGAPI
|
|
|
440 |
png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
|
|
|
441 |
int unit, double width, double height)
|
|
|
442 |
{
|
|
|
443 |
png_debug1(1, "in %s storage function\n", "sCAL");
|
|
|
444 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
445 |
return;
|
|
|
446 |
|
|
|
447 |
info_ptr->scal_unit = (png_byte)unit;
|
|
|
448 |
info_ptr->scal_pixel_width = width;
|
|
|
449 |
info_ptr->scal_pixel_height = height;
|
|
|
450 |
|
|
|
451 |
info_ptr->valid |= PNG_INFO_sCAL;
|
|
|
452 |
}
|
|
|
453 |
#else
|
|
|
454 |
#ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
455 |
void PNGAPI
|
|
|
456 |
png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
|
|
|
457 |
int unit, png_charp swidth, png_charp sheight)
|
|
|
458 |
{
|
|
|
459 |
png_uint_32 length;
|
|
|
460 |
|
|
|
461 |
png_debug1(1, "in %s storage function\n", "sCAL");
|
|
|
462 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
463 |
return;
|
|
|
464 |
|
|
|
465 |
info_ptr->scal_unit = (png_byte)unit;
|
|
|
466 |
|
|
|
467 |
length = png_strlen(swidth) + 1;
|
|
|
468 |
png_debug1(3, "allocating unit for info (%d bytes)\n", length);
|
|
|
469 |
info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
|
|
|
470 |
if (info_ptr->scal_s_width == NULL)
|
|
|
471 |
{
|
|
|
472 |
png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
|
|
|
473 |
}
|
|
|
474 |
png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
|
|
|
475 |
|
|
|
476 |
length = png_strlen(sheight) + 1;
|
|
|
477 |
png_debug1(3, "allocating unit for info (%d bytes)\n", length);
|
|
|
478 |
info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
|
|
|
479 |
if (info_ptr->scal_s_height == NULL)
|
|
|
480 |
{
|
|
|
481 |
png_free (png_ptr, info_ptr->scal_s_width);
|
|
|
482 |
png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
|
|
|
483 |
}
|
|
|
484 |
png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
|
|
|
485 |
|
|
|
486 |
info_ptr->valid |= PNG_INFO_sCAL;
|
|
|
487 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
488 |
info_ptr->free_me |= PNG_FREE_SCAL;
|
|
|
489 |
#endif
|
|
|
490 |
}
|
|
|
491 |
#endif
|
|
|
492 |
#endif
|
|
|
493 |
#endif
|
|
|
494 |
|
|
|
495 |
#if defined(PNG_pHYs_SUPPORTED)
|
|
|
496 |
void PNGAPI
|
|
|
497 |
png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
|
|
|
498 |
png_uint_32 res_x, png_uint_32 res_y, int unit_type)
|
|
|
499 |
{
|
|
|
500 |
png_debug1(1, "in %s storage function\n", "pHYs");
|
|
|
501 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
502 |
return;
|
|
|
503 |
|
|
|
504 |
info_ptr->x_pixels_per_unit = res_x;
|
|
|
505 |
info_ptr->y_pixels_per_unit = res_y;
|
|
|
506 |
info_ptr->phys_unit_type = (png_byte)unit_type;
|
|
|
507 |
info_ptr->valid |= PNG_INFO_pHYs;
|
|
|
508 |
}
|
|
|
509 |
#endif
|
|
|
510 |
|
|
|
511 |
void PNGAPI
|
|
|
512 |
png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
|
|
|
513 |
png_colorp palette, int num_palette)
|
|
|
514 |
{
|
|
|
515 |
|
|
|
516 |
png_debug1(1, "in %s storage function\n", "PLTE");
|
|
|
517 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
518 |
return;
|
|
|
519 |
|
|
|
520 |
/*
|
|
|
521 |
* It may not actually be necessary to set png_ptr->palette here;
|
|
|
522 |
* we do it for backward compatibility with the way the png_handle_tRNS
|
|
|
523 |
* function used to do the allocation.
|
|
|
524 |
*/
|
|
|
525 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
526 |
png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
|
|
|
527 |
#endif
|
|
|
528 |
|
|
|
529 |
/* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
|
|
|
530 |
in case of an invalid PNG file that has too-large sample values. */
|
|
|
531 |
png_ptr->palette = (png_colorp)png_malloc(png_ptr,
|
|
|
532 |
256 * png_sizeof(png_color));
|
|
|
533 |
png_memset(png_ptr->palette, 0, 256 * png_sizeof(png_color));
|
|
|
534 |
png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color));
|
|
|
535 |
info_ptr->palette = png_ptr->palette;
|
|
|
536 |
info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
|
|
|
537 |
|
|
|
538 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
539 |
info_ptr->free_me |= PNG_FREE_PLTE;
|
|
|
540 |
#else
|
|
|
541 |
png_ptr->flags |= PNG_FLAG_FREE_PLTE;
|
|
|
542 |
#endif
|
|
|
543 |
|
|
|
544 |
info_ptr->valid |= PNG_INFO_PLTE;
|
|
|
545 |
}
|
|
|
546 |
|
|
|
547 |
#if defined(PNG_sBIT_SUPPORTED)
|
|
|
548 |
void PNGAPI
|
|
|
549 |
png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
|
|
|
550 |
png_color_8p sig_bit)
|
|
|
551 |
{
|
|
|
552 |
png_debug1(1, "in %s storage function\n", "sBIT");
|
|
|
553 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
554 |
return;
|
|
|
555 |
|
|
|
556 |
png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof (png_color_8));
|
|
|
557 |
info_ptr->valid |= PNG_INFO_sBIT;
|
|
|
558 |
}
|
|
|
559 |
#endif
|
|
|
560 |
|
|
|
561 |
#if defined(PNG_sRGB_SUPPORTED)
|
|
|
562 |
void PNGAPI
|
|
|
563 |
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
|
|
|
564 |
{
|
|
|
565 |
png_debug1(1, "in %s storage function\n", "sRGB");
|
|
|
566 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
567 |
return;
|
|
|
568 |
|
|
|
569 |
info_ptr->srgb_intent = (png_byte)intent;
|
|
|
570 |
info_ptr->valid |= PNG_INFO_sRGB;
|
|
|
571 |
}
|
|
|
572 |
|
|
|
573 |
void PNGAPI
|
|
|
574 |
png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
|
|
|
575 |
int intent)
|
|
|
576 |
{
|
|
|
577 |
#if defined(PNG_gAMA_SUPPORTED)
|
|
|
578 |
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
579 |
float file_gamma;
|
|
|
580 |
#endif
|
|
|
581 |
#ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
582 |
png_fixed_point int_file_gamma;
|
|
|
583 |
#endif
|
|
|
584 |
#endif
|
|
|
585 |
#if defined(PNG_cHRM_SUPPORTED)
|
|
|
586 |
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
587 |
float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
|
|
|
588 |
#endif
|
|
|
589 |
#ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
590 |
png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
|
|
|
591 |
int_green_y, int_blue_x, int_blue_y;
|
|
|
592 |
#endif
|
|
|
593 |
#endif
|
|
|
594 |
png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
|
|
|
595 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
596 |
return;
|
|
|
597 |
|
|
|
598 |
png_set_sRGB(png_ptr, info_ptr, intent);
|
|
|
599 |
|
|
|
600 |
#if defined(PNG_gAMA_SUPPORTED)
|
|
|
601 |
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
602 |
file_gamma = (float).45455;
|
|
|
603 |
png_set_gAMA(png_ptr, info_ptr, file_gamma);
|
|
|
604 |
#endif
|
|
|
605 |
#ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
606 |
int_file_gamma = 45455L;
|
|
|
607 |
png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
|
|
|
608 |
#endif
|
|
|
609 |
#endif
|
|
|
610 |
|
|
|
611 |
#if defined(PNG_cHRM_SUPPORTED)
|
|
|
612 |
#ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
613 |
int_white_x = 31270L;
|
|
|
614 |
int_white_y = 32900L;
|
|
|
615 |
int_red_x = 64000L;
|
|
|
616 |
int_red_y = 33000L;
|
|
|
617 |
int_green_x = 30000L;
|
|
|
618 |
int_green_y = 60000L;
|
|
|
619 |
int_blue_x = 15000L;
|
|
|
620 |
int_blue_y = 6000L;
|
|
|
621 |
|
|
|
622 |
png_set_cHRM_fixed(png_ptr, info_ptr,
|
|
|
623 |
int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
|
|
|
624 |
int_blue_x, int_blue_y);
|
|
|
625 |
#endif
|
|
|
626 |
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
627 |
white_x = (float).3127;
|
|
|
628 |
white_y = (float).3290;
|
|
|
629 |
red_x = (float).64;
|
|
|
630 |
red_y = (float).33;
|
|
|
631 |
green_x = (float).30;
|
|
|
632 |
green_y = (float).60;
|
|
|
633 |
blue_x = (float).15;
|
|
|
634 |
blue_y = (float).06;
|
|
|
635 |
|
|
|
636 |
png_set_cHRM(png_ptr, info_ptr,
|
|
|
637 |
white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
|
|
|
638 |
#endif
|
|
|
639 |
#endif
|
|
|
640 |
}
|
|
|
641 |
#endif
|
|
|
642 |
|
|
|
643 |
|
|
|
644 |
#if defined(PNG_iCCP_SUPPORTED)
|
|
|
645 |
void PNGAPI
|
|
|
646 |
png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
|
|
|
647 |
png_charp name, int compression_type,
|
|
|
648 |
png_charp profile, png_uint_32 proflen)
|
|
|
649 |
{
|
|
|
650 |
png_charp new_iccp_name;
|
|
|
651 |
png_charp new_iccp_profile;
|
|
|
652 |
|
|
|
653 |
png_debug1(1, "in %s storage function\n", "iCCP");
|
|
|
654 |
if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
|
|
|
655 |
return;
|
|
|
656 |
|
|
|
657 |
new_iccp_name = (png_charp)png_malloc_warn(png_ptr, png_strlen(name)+1);
|
|
|
658 |
if (new_iccp_name == NULL)
|
|
|
659 |
{
|
|
|
660 |
png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
|
|
|
661 |
return;
|
|
|
662 |
}
|
|
|
663 |
png_strcpy(new_iccp_name, name);
|
|
|
664 |
new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
|
|
|
665 |
if (new_iccp_profile == NULL)
|
|
|
666 |
{
|
|
|
667 |
png_free (png_ptr, new_iccp_name);
|
|
|
668 |
png_warning(png_ptr, "Insufficient memory to process iCCP profile.");
|
|
|
669 |
return;
|
|
|
670 |
}
|
|
|
671 |
png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
|
|
|
672 |
|
|
|
673 |
png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
|
|
|
674 |
|
|
|
675 |
info_ptr->iccp_proflen = proflen;
|
|
|
676 |
info_ptr->iccp_name = new_iccp_name;
|
|
|
677 |
info_ptr->iccp_profile = new_iccp_profile;
|
|
|
678 |
/* Compression is always zero but is here so the API and info structure
|
|
|
679 |
* does not have to change if we introduce multiple compression types */
|
|
|
680 |
info_ptr->iccp_compression = (png_byte)compression_type;
|
|
|
681 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
682 |
info_ptr->free_me |= PNG_FREE_ICCP;
|
|
|
683 |
#endif
|
|
|
684 |
info_ptr->valid |= PNG_INFO_iCCP;
|
|
|
685 |
}
|
|
|
686 |
#endif
|
|
|
687 |
|
|
|
688 |
#if defined(PNG_TEXT_SUPPORTED)
|
|
|
689 |
void PNGAPI
|
|
|
690 |
png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
|
|
|
691 |
int num_text)
|
|
|
692 |
{
|
|
|
693 |
int ret;
|
|
|
694 |
ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
|
|
|
695 |
if (ret)
|
|
|
696 |
png_error(png_ptr, "Insufficient memory to store text");
|
|
|
697 |
}
|
|
|
698 |
|
|
|
699 |
int /* PRIVATE */
|
|
|
700 |
png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
|
|
|
701 |
int num_text)
|
|
|
702 |
{
|
|
|
703 |
int i;
|
|
|
704 |
|
|
|
705 |
png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
|
|
|
706 |
"text" : (png_const_charp)png_ptr->chunk_name));
|
|
|
707 |
|
|
|
708 |
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
|
|
|
709 |
return(0);
|
|
|
710 |
|
|
|
711 |
/* Make sure we have enough space in the "text" array in info_struct
|
|
|
712 |
* to hold all of the incoming text_ptr objects.
|
|
|
713 |
*/
|
|
|
714 |
if (info_ptr->num_text + num_text > info_ptr->max_text)
|
|
|
715 |
{
|
|
|
716 |
if (info_ptr->text != NULL)
|
|
|
717 |
{
|
|
|
718 |
png_textp old_text;
|
|
|
719 |
int old_max;
|
|
|
720 |
|
|
|
721 |
old_max = info_ptr->max_text;
|
|
|
722 |
info_ptr->max_text = info_ptr->num_text + num_text + 8;
|
|
|
723 |
old_text = info_ptr->text;
|
|
|
724 |
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
|
|
|
725 |
(png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
|
|
|
726 |
if (info_ptr->text == NULL)
|
|
|
727 |
{
|
|
|
728 |
png_free(png_ptr, old_text);
|
|
|
729 |
return(1);
|
|
|
730 |
}
|
|
|
731 |
png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
|
|
|
732 |
png_sizeof(png_text)));
|
|
|
733 |
png_free(png_ptr, old_text);
|
|
|
734 |
}
|
|
|
735 |
else
|
|
|
736 |
{
|
|
|
737 |
info_ptr->max_text = num_text + 8;
|
|
|
738 |
info_ptr->num_text = 0;
|
|
|
739 |
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
|
|
|
740 |
(png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
|
|
|
741 |
if (info_ptr->text == NULL)
|
|
|
742 |
return(1);
|
|
|
743 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
744 |
info_ptr->free_me |= PNG_FREE_TEXT;
|
|
|
745 |
#endif
|
|
|
746 |
}
|
|
|
747 |
png_debug1(3, "allocated %d entries for info_ptr->text\n",
|
|
|
748 |
info_ptr->max_text);
|
|
|
749 |
}
|
|
|
750 |
for (i = 0; i < num_text; i++)
|
|
|
751 |
{
|
|
|
752 |
png_size_t text_length,key_len;
|
|
|
753 |
png_size_t lang_len,lang_key_len;
|
|
|
754 |
png_textp textp = &(info_ptr->text[info_ptr->num_text]);
|
|
|
755 |
|
|
|
756 |
if (text_ptr[i].key == NULL)
|
|
|
757 |
continue;
|
|
|
758 |
|
|
|
759 |
key_len = png_strlen(text_ptr[i].key);
|
|
|
760 |
|
|
|
761 |
if(text_ptr[i].compression <= 0)
|
|
|
762 |
{
|
|
|
763 |
lang_len = 0;
|
|
|
764 |
lang_key_len = 0;
|
|
|
765 |
}
|
|
|
766 |
else
|
|
|
767 |
#ifdef PNG_iTXt_SUPPORTED
|
|
|
768 |
{
|
|
|
769 |
/* set iTXt data */
|
|
|
770 |
if (text_ptr[i].lang != NULL)
|
|
|
771 |
lang_len = png_strlen(text_ptr[i].lang);
|
|
|
772 |
else
|
|
|
773 |
lang_len = 0;
|
|
|
774 |
if (text_ptr[i].lang_key != NULL)
|
|
|
775 |
lang_key_len = png_strlen(text_ptr[i].lang_key);
|
|
|
776 |
else
|
|
|
777 |
lang_key_len = 0;
|
|
|
778 |
}
|
|
|
779 |
#else
|
|
|
780 |
{
|
|
|
781 |
png_warning(png_ptr, "iTXt chunk not supported.");
|
|
|
782 |
continue;
|
|
|
783 |
}
|
|
|
784 |
#endif
|
|
|
785 |
|
|
|
786 |
if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
|
|
|
787 |
{
|
|
|
788 |
text_length = 0;
|
|
|
789 |
#ifdef PNG_iTXt_SUPPORTED
|
|
|
790 |
if(text_ptr[i].compression > 0)
|
|
|
791 |
textp->compression = PNG_ITXT_COMPRESSION_NONE;
|
|
|
792 |
else
|
|
|
793 |
#endif
|
|
|
794 |
textp->compression = PNG_TEXT_COMPRESSION_NONE;
|
|
|
795 |
}
|
|
|
796 |
else
|
|
|
797 |
{
|
|
|
798 |
text_length = png_strlen(text_ptr[i].text);
|
|
|
799 |
textp->compression = text_ptr[i].compression;
|
|
|
800 |
}
|
|
|
801 |
|
|
|
802 |
textp->key = (png_charp)png_malloc_warn(png_ptr,
|
|
|
803 |
(png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
|
|
|
804 |
if (textp->key == NULL)
|
|
|
805 |
return(1);
|
|
|
806 |
png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
|
|
|
807 |
(png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
|
|
|
808 |
(int)textp->key);
|
|
|
809 |
|
|
|
810 |
png_memcpy(textp->key, text_ptr[i].key,
|
|
|
811 |
(png_size_t)(key_len));
|
|
|
812 |
*(textp->key+key_len) = '\0';
|
|
|
813 |
#ifdef PNG_iTXt_SUPPORTED
|
|
|
814 |
if (text_ptr[i].compression > 0)
|
|
|
815 |
{
|
|
|
816 |
textp->lang=textp->key + key_len + 1;
|
|
|
817 |
png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
|
|
|
818 |
*(textp->lang+lang_len) = '\0';
|
|
|
819 |
textp->lang_key=textp->lang + lang_len + 1;
|
|
|
820 |
png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
|
|
|
821 |
*(textp->lang_key+lang_key_len) = '\0';
|
|
|
822 |
textp->text=textp->lang_key + lang_key_len + 1;
|
|
|
823 |
}
|
|
|
824 |
else
|
|
|
825 |
#endif
|
|
|
826 |
{
|
|
|
827 |
#ifdef PNG_iTXt_SUPPORTED
|
|
|
828 |
textp->lang=NULL;
|
|
|
829 |
textp->lang_key=NULL;
|
|
|
830 |
#endif
|
|
|
831 |
textp->text=textp->key + key_len + 1;
|
|
|
832 |
}
|
|
|
833 |
if(text_length)
|
|
|
834 |
png_memcpy(textp->text, text_ptr[i].text,
|
|
|
835 |
(png_size_t)(text_length));
|
|
|
836 |
*(textp->text+text_length) = '\0';
|
|
|
837 |
|
|
|
838 |
#ifdef PNG_iTXt_SUPPORTED
|
|
|
839 |
if(textp->compression > 0)
|
|
|
840 |
{
|
|
|
841 |
textp->text_length = 0;
|
|
|
842 |
textp->itxt_length = text_length;
|
|
|
843 |
}
|
|
|
844 |
else
|
|
|
845 |
#endif
|
|
|
846 |
{
|
|
|
847 |
textp->text_length = text_length;
|
|
|
848 |
#ifdef PNG_iTXt_SUPPORTED
|
|
|
849 |
textp->itxt_length = 0;
|
|
|
850 |
#endif
|
|
|
851 |
}
|
|
|
852 |
info_ptr->text[info_ptr->num_text]= *textp;
|
|
|
853 |
info_ptr->num_text++;
|
|
|
854 |
png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
|
|
|
855 |
}
|
|
|
856 |
return(0);
|
|
|
857 |
}
|
|
|
858 |
#endif
|
|
|
859 |
|
|
|
860 |
#if defined(PNG_tIME_SUPPORTED)
|
|
|
861 |
void PNGAPI
|
|
|
862 |
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
|
|
|
863 |
{
|
|
|
864 |
png_debug1(1, "in %s storage function\n", "tIME");
|
|
|
865 |
if (png_ptr == NULL || info_ptr == NULL ||
|
|
|
866 |
(png_ptr->mode & PNG_WROTE_tIME))
|
|
|
867 |
return;
|
|
|
868 |
|
|
|
869 |
png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof (png_time));
|
|
|
870 |
info_ptr->valid |= PNG_INFO_tIME;
|
|
|
871 |
}
|
|
|
872 |
#endif
|
|
|
873 |
|
|
|
874 |
#if defined(PNG_tRNS_SUPPORTED)
|
|
|
875 |
void PNGAPI
|
|
|
876 |
png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
|
|
|
877 |
png_bytep trans, int num_trans, png_color_16p trans_values)
|
|
|
878 |
{
|
|
|
879 |
png_debug1(1, "in %s storage function\n", "tRNS");
|
|
|
880 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
881 |
return;
|
|
|
882 |
|
|
|
883 |
if (trans != NULL)
|
|
|
884 |
{
|
|
|
885 |
/*
|
|
|
886 |
* It may not actually be necessary to set png_ptr->trans here;
|
|
|
887 |
* we do it for backward compatibility with the way the png_handle_tRNS
|
|
|
888 |
* function used to do the allocation.
|
|
|
889 |
*/
|
|
|
890 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
891 |
png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
|
|
|
892 |
#endif
|
|
|
893 |
/* Changed from num_trans to 256 in version 1.2.1 */
|
|
|
894 |
png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
|
|
|
895 |
(png_uint_32)256);
|
|
|
896 |
png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
|
|
|
897 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
898 |
info_ptr->free_me |= PNG_FREE_TRNS;
|
|
|
899 |
#else
|
|
|
900 |
png_ptr->flags |= PNG_FLAG_FREE_TRNS;
|
|
|
901 |
#endif
|
|
|
902 |
}
|
|
|
903 |
|
|
|
904 |
if (trans_values != NULL)
|
|
|
905 |
{
|
|
|
906 |
png_memcpy(&(info_ptr->trans_values), trans_values,
|
|
|
907 |
png_sizeof(png_color_16));
|
|
|
908 |
if (num_trans == 0)
|
|
|
909 |
num_trans = 1;
|
|
|
910 |
}
|
|
|
911 |
info_ptr->num_trans = (png_uint_16)num_trans;
|
|
|
912 |
info_ptr->valid |= PNG_INFO_tRNS;
|
|
|
913 |
}
|
|
|
914 |
#endif
|
|
|
915 |
|
|
|
916 |
#if defined(PNG_sPLT_SUPPORTED)
|
|
|
917 |
void PNGAPI
|
|
|
918 |
png_set_sPLT(png_structp png_ptr,
|
|
|
919 |
png_infop info_ptr, png_sPLT_tp entries, int nentries)
|
|
|
920 |
{
|
|
|
921 |
png_sPLT_tp np;
|
|
|
922 |
int i;
|
|
|
923 |
|
|
|
924 |
np = (png_sPLT_tp)png_malloc_warn(png_ptr,
|
|
|
925 |
(info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t));
|
|
|
926 |
if (np == NULL)
|
|
|
927 |
{
|
|
|
928 |
png_warning(png_ptr, "No memory for sPLT palettes.");
|
|
|
929 |
return;
|
|
|
930 |
}
|
|
|
931 |
|
|
|
932 |
png_memcpy(np, info_ptr->splt_palettes,
|
|
|
933 |
info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
|
|
|
934 |
png_free(png_ptr, info_ptr->splt_palettes);
|
|
|
935 |
info_ptr->splt_palettes=NULL;
|
|
|
936 |
|
|
|
937 |
for (i = 0; i < nentries; i++)
|
|
|
938 |
{
|
|
|
939 |
png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
|
|
|
940 |
png_sPLT_tp from = entries + i;
|
|
|
941 |
|
|
|
942 |
to->name = (png_charp)png_malloc(png_ptr,
|
|
|
943 |
png_strlen(from->name) + 1);
|
|
|
944 |
/* TODO: use png_malloc_warn */
|
|
|
945 |
png_strcpy(to->name, from->name);
|
|
|
946 |
to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
|
|
|
947 |
from->nentries * png_sizeof(png_sPLT_t));
|
|
|
948 |
/* TODO: use png_malloc_warn */
|
|
|
949 |
png_memcpy(to->entries, from->entries,
|
|
|
950 |
from->nentries * png_sizeof(png_sPLT_t));
|
|
|
951 |
to->nentries = from->nentries;
|
|
|
952 |
to->depth = from->depth;
|
|
|
953 |
}
|
|
|
954 |
|
|
|
955 |
info_ptr->splt_palettes = np;
|
|
|
956 |
info_ptr->splt_palettes_num += nentries;
|
|
|
957 |
info_ptr->valid |= PNG_INFO_sPLT;
|
|
|
958 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
959 |
info_ptr->free_me |= PNG_FREE_SPLT;
|
|
|
960 |
#endif
|
|
|
961 |
}
|
|
|
962 |
#endif /* PNG_sPLT_SUPPORTED */
|
|
|
963 |
|
|
|
964 |
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
|
|
965 |
void PNGAPI
|
|
|
966 |
png_set_unknown_chunks(png_structp png_ptr,
|
|
|
967 |
png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
|
|
|
968 |
{
|
|
|
969 |
png_unknown_chunkp np;
|
|
|
970 |
int i;
|
|
|
971 |
|
|
|
972 |
if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
|
|
|
973 |
return;
|
|
|
974 |
|
|
|
975 |
np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
|
|
|
976 |
(info_ptr->unknown_chunks_num + num_unknowns) *
|
|
|
977 |
png_sizeof(png_unknown_chunk));
|
|
|
978 |
if (np == NULL)
|
|
|
979 |
{
|
|
|
980 |
png_warning(png_ptr, "Out of memory while processing unknown chunk.");
|
|
|
981 |
return;
|
|
|
982 |
}
|
|
|
983 |
|
|
|
984 |
png_memcpy(np, info_ptr->unknown_chunks,
|
|
|
985 |
info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
|
|
|
986 |
png_free(png_ptr, info_ptr->unknown_chunks);
|
|
|
987 |
info_ptr->unknown_chunks=NULL;
|
|
|
988 |
|
|
|
989 |
for (i = 0; i < num_unknowns; i++)
|
|
|
990 |
{
|
|
|
991 |
png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
|
|
|
992 |
png_unknown_chunkp from = unknowns + i;
|
|
|
993 |
|
|
|
994 |
png_strncpy((png_charp)to->name, (png_charp)from->name, 5);
|
|
|
995 |
to->data = (png_bytep)png_malloc_warn(png_ptr, from->size);
|
|
|
996 |
if (to->data == NULL)
|
|
|
997 |
{
|
|
|
998 |
png_warning(png_ptr, "Out of memory processing unknown chunk.");
|
|
|
999 |
}
|
|
|
1000 |
else
|
|
|
1001 |
{
|
|
|
1002 |
png_memcpy(to->data, from->data, from->size);
|
|
|
1003 |
to->size = from->size;
|
|
|
1004 |
|
|
|
1005 |
/* note our location in the read or write sequence */
|
|
|
1006 |
to->location = (png_byte)(png_ptr->mode & 0xff);
|
|
|
1007 |
}
|
|
|
1008 |
}
|
|
|
1009 |
|
|
|
1010 |
info_ptr->unknown_chunks = np;
|
|
|
1011 |
info_ptr->unknown_chunks_num += num_unknowns;
|
|
|
1012 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
1013 |
info_ptr->free_me |= PNG_FREE_UNKN;
|
|
|
1014 |
#endif
|
|
|
1015 |
}
|
|
|
1016 |
void PNGAPI
|
|
|
1017 |
png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
|
|
|
1018 |
int chunk, int location)
|
|
|
1019 |
{
|
|
|
1020 |
if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
|
|
|
1021 |
(int)info_ptr->unknown_chunks_num)
|
|
|
1022 |
info_ptr->unknown_chunks[chunk].location = (png_byte)location;
|
|
|
1023 |
}
|
|
|
1024 |
#endif
|
|
|
1025 |
|
|
|
1026 |
#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
|
|
|
1027 |
defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
|
|
|
1028 |
void PNGAPI
|
|
|
1029 |
png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
|
|
|
1030 |
{
|
|
|
1031 |
/* This function is deprecated in favor of png_permit_mng_features()
|
|
|
1032 |
and will be removed from libpng-2.0.0 */
|
|
|
1033 |
png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
|
|
|
1034 |
if (png_ptr == NULL)
|
|
|
1035 |
return;
|
|
|
1036 |
png_ptr->mng_features_permitted = (png_byte)
|
|
|
1037 |
((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) |
|
|
|
1038 |
((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
|
|
|
1039 |
}
|
|
|
1040 |
#endif
|
|
|
1041 |
|
|
|
1042 |
#if defined(PNG_MNG_FEATURES_SUPPORTED)
|
|
|
1043 |
png_uint_32 PNGAPI
|
|
|
1044 |
png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
|
|
|
1045 |
{
|
|
|
1046 |
png_debug(1, "in png_permit_mng_features\n");
|
|
|
1047 |
if (png_ptr == NULL)
|
|
|
1048 |
return (png_uint_32)0;
|
|
|
1049 |
png_ptr->mng_features_permitted =
|
|
|
1050 |
(png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
|
|
|
1051 |
return (png_uint_32)png_ptr->mng_features_permitted;
|
|
|
1052 |
}
|
|
|
1053 |
#endif
|
|
|
1054 |
|
|
|
1055 |
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
|
|
1056 |
void PNGAPI
|
|
|
1057 |
png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
|
|
|
1058 |
chunk_list, int num_chunks)
|
|
|
1059 |
{
|
|
|
1060 |
png_bytep new_list, p;
|
|
|
1061 |
int i, old_num_chunks;
|
|
|
1062 |
if (num_chunks == 0)
|
|
|
1063 |
{
|
|
|
1064 |
if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
|
|
|
1065 |
png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
|
|
|
1066 |
else
|
|
|
1067 |
png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
|
|
|
1068 |
|
|
|
1069 |
if(keep == PNG_HANDLE_CHUNK_ALWAYS)
|
|
|
1070 |
png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
|
|
|
1071 |
else
|
|
|
1072 |
png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
|
|
|
1073 |
return;
|
|
|
1074 |
}
|
|
|
1075 |
if (chunk_list == NULL)
|
|
|
1076 |
return;
|
|
|
1077 |
old_num_chunks=png_ptr->num_chunk_list;
|
|
|
1078 |
new_list=(png_bytep)png_malloc(png_ptr,
|
|
|
1079 |
(png_uint_32)(5*(num_chunks+old_num_chunks)));
|
|
|
1080 |
if(png_ptr->chunk_list != NULL)
|
|
|
1081 |
{
|
|
|
1082 |
png_memcpy(new_list, png_ptr->chunk_list,
|
|
|
1083 |
(png_size_t)(5*old_num_chunks));
|
|
|
1084 |
png_free(png_ptr, png_ptr->chunk_list);
|
|
|
1085 |
png_ptr->chunk_list=NULL;
|
|
|
1086 |
}
|
|
|
1087 |
png_memcpy(new_list+5*old_num_chunks, chunk_list,
|
|
|
1088 |
(png_size_t)(5*num_chunks));
|
|
|
1089 |
for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
|
|
|
1090 |
*p=(png_byte)keep;
|
|
|
1091 |
png_ptr->num_chunk_list=old_num_chunks+num_chunks;
|
|
|
1092 |
png_ptr->chunk_list=new_list;
|
|
|
1093 |
#ifdef PNG_FREE_ME_SUPPORTED
|
|
|
1094 |
png_ptr->free_me |= PNG_FREE_LIST;
|
|
|
1095 |
#endif
|
|
|
1096 |
}
|
|
|
1097 |
#endif
|
|
|
1098 |
|
|
|
1099 |
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
|
|
|
1100 |
void PNGAPI
|
|
|
1101 |
png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
|
|
|
1102 |
png_user_chunk_ptr read_user_chunk_fn)
|
|
|
1103 |
{
|
|
|
1104 |
png_debug(1, "in png_set_read_user_chunk_fn\n");
|
|
|
1105 |
png_ptr->read_user_chunk_fn = read_user_chunk_fn;
|
|
|
1106 |
png_ptr->user_chunk_ptr = user_chunk_ptr;
|
|
|
1107 |
}
|
|
|
1108 |
#endif
|
|
|
1109 |
|
|
|
1110 |
#if defined(PNG_INFO_IMAGE_SUPPORTED)
|
|
|
1111 |
void PNGAPI
|
|
|
1112 |
png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
|
|
|
1113 |
{
|
|
|
1114 |
png_debug1(1, "in %s storage function\n", "rows");
|
|
|
1115 |
|
|
|
1116 |
if (png_ptr == NULL || info_ptr == NULL)
|
|
|
1117 |
return;
|
|
|
1118 |
|
|
|
1119 |
if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
|
|
|
1120 |
png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
|
|
|
1121 |
info_ptr->row_pointers = row_pointers;
|
|
|
1122 |
if(row_pointers)
|
|
|
1123 |
info_ptr->valid |= PNG_INFO_IDAT;
|
|
|
1124 |
}
|
|
|
1125 |
#endif
|
|
|
1126 |
|
|
|
1127 |
#ifdef PNG_WRITE_SUPPORTED
|
|
|
1128 |
void PNGAPI
|
|
|
1129 |
png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
|
|
|
1130 |
{
|
|
|
1131 |
if(png_ptr->zbuf)
|
|
|
1132 |
png_free(png_ptr, png_ptr->zbuf);
|
|
|
1133 |
png_ptr->zbuf_size = (png_size_t)size;
|
|
|
1134 |
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
|
|
|
1135 |
png_ptr->zstream.next_out = png_ptr->zbuf;
|
|
|
1136 |
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
|
|
|
1137 |
}
|
|
|
1138 |
#endif
|
|
|
1139 |
|
|
|
1140 |
void PNGAPI
|
|
|
1141 |
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
|
|
|
1142 |
{
|
|
|
1143 |
if (png_ptr && info_ptr)
|
|
|
1144 |
info_ptr->valid &= ~(mask);
|
|
|
1145 |
}
|
|
|
1146 |
|
|
|
1147 |
|
|
|
1148 |
#ifndef PNG_1_0_X
|
|
|
1149 |
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
|
|
1150 |
/* this function was added to libpng 1.2.0 and should always exist by default */
|
|
|
1151 |
void PNGAPI
|
|
|
1152 |
png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
|
|
|
1153 |
{
|
|
|
1154 |
png_uint_32 settable_asm_flags;
|
|
|
1155 |
png_uint_32 settable_mmx_flags;
|
|
|
1156 |
|
|
|
1157 |
settable_mmx_flags =
|
|
|
1158 |
#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
|
|
|
1159 |
PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
|
|
|
1160 |
#endif
|
|
|
1161 |
#ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
|
|
|
1162 |
PNG_ASM_FLAG_MMX_READ_INTERLACE |
|
|
|
1163 |
#endif
|
|
|
1164 |
#ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
|
|
|
1165 |
PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
|
|
|
1166 |
PNG_ASM_FLAG_MMX_READ_FILTER_UP |
|
|
|
1167 |
PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
|
|
|
1168 |
PNG_ASM_FLAG_MMX_READ_FILTER_PAETH |
|
|
|
1169 |
#endif
|
|
|
1170 |
0;
|
|
|
1171 |
|
|
|
1172 |
/* could be some non-MMX ones in the future, but not currently: */
|
|
|
1173 |
settable_asm_flags = settable_mmx_flags;
|
|
|
1174 |
|
|
|
1175 |
if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) ||
|
|
|
1176 |
!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU))
|
|
|
1177 |
{
|
|
|
1178 |
/* clear all MMX flags if MMX isn't supported */
|
|
|
1179 |
settable_asm_flags &= ~settable_mmx_flags;
|
|
|
1180 |
png_ptr->asm_flags &= ~settable_mmx_flags;
|
|
|
1181 |
}
|
|
|
1182 |
|
|
|
1183 |
/* we're replacing the settable bits with those passed in by the user,
|
|
|
1184 |
* so first zero them out of the master copy, then logical-OR in the
|
|
|
1185 |
* allowed subset that was requested */
|
|
|
1186 |
|
|
|
1187 |
png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */
|
|
|
1188 |
png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */
|
|
|
1189 |
}
|
|
|
1190 |
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
1191 |
|
|
|
1192 |
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
|
|
1193 |
/* this function was added to libpng 1.2.0 */
|
|
|
1194 |
void PNGAPI
|
|
|
1195 |
png_set_mmx_thresholds (png_structp png_ptr,
|
|
|
1196 |
png_byte mmx_bitdepth_threshold,
|
|
|
1197 |
png_uint_32 mmx_rowbytes_threshold)
|
|
|
1198 |
{
|
|
|
1199 |
png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
|
|
|
1200 |
png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
|
|
|
1201 |
}
|
|
|
1202 |
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
1203 |
|
|
|
1204 |
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
|
|
|
1205 |
/* this function was added to libpng 1.2.6 */
|
|
|
1206 |
void PNGAPI
|
|
|
1207 |
png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
|
|
|
1208 |
png_uint_32 user_height_max)
|
|
|
1209 |
{
|
|
|
1210 |
/* Images with dimensions larger than these limits will be
|
|
|
1211 |
* rejected by png_set_IHDR(). To accept any PNG datastream
|
|
|
1212 |
* regardless of dimensions, set both limits to 0x7ffffffL.
|
|
|
1213 |
*/
|
|
|
1214 |
png_ptr->user_width_max = user_width_max;
|
|
|
1215 |
png_ptr->user_height_max = user_height_max;
|
|
|
1216 |
}
|
|
|
1217 |
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
|
|
|
1218 |
|
|
|
1219 |
#endif /* ?PNG_1_0_X */
|