| 1 |
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| 2 | /* pngset.c - storage of image information into info struct
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| 3 | *
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| 4 | * libpng 1.2.5 - October 3, 2002
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| 5 | * For conditions of distribution and use, see copyright notice in png.h
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| 6 | * Copyright (c) 1998-2002 Glenn Randers-Pehrson
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| 7 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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| 8 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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| 9 | *
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| 10 | * The functions here are used during reads to store data from the file
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| 11 | * into the info struct, and during writes to store application data
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| 12 | * into the info struct for writing into the file. This abstracts the
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| 13 | * info struct and allows us to change the structure in the future.
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| 14 | */
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| 15 |
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| 16 | #define PNG_INTERNAL
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| 17 | #include "png.h"
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| 18 |
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| 19 | #if defined(PNG_bKGD_SUPPORTED)
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| 20 | void PNGAPI
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| 21 | png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
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| 22 | {
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| 23 | png_debug1(1, "in %s storage function\n", "bKGD");
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| 24 | if (png_ptr == NULL || info_ptr == NULL)
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| 25 | return;
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| 26 |
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| 27 | png_memcpy(&(info_ptr->background), background, sizeof(png_color_16));
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| 28 | info_ptr->valid |= PNG_INFO_bKGD;
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| 29 | }
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| 30 | #endif
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| 31 |
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| 32 | #if defined(PNG_cHRM_SUPPORTED)
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| 33 | #ifdef PNG_FLOATING_POINT_SUPPORTED
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| 34 | void PNGAPI
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| 35 | png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
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| 36 | double white_x, double white_y, double red_x, double red_y,
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| 37 | double green_x, double green_y, double blue_x, double blue_y)
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| 38 | {
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| 39 | png_debug1(1, "in %s storage function\n", "cHRM");
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| 40 | if (png_ptr == NULL || info_ptr == NULL)
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| 41 | return;
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| 42 |
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| 43 | if (white_x < 0.0 || white_y < 0.0 ||
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| 44 | red_x < 0.0 || red_y < 0.0 ||
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| 45 | green_x < 0.0 || green_y < 0.0 ||
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| 46 | blue_x < 0.0 || blue_y < 0.0)
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| 47 | {
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| 48 | png_warning(png_ptr,
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| 49 | "Ignoring attempt to set negative chromaticity value");
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| 50 | return;
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| 51 | }
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| 52 | if (white_x > 21474.83 || white_y > 21474.83 ||
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| 53 | red_x > 21474.83 || red_y > 21474.83 ||
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| 54 | green_x > 21474.83 || green_y > 21474.83 ||
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| 55 | blue_x > 21474.83 || blue_y > 21474.83)
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| 56 | {
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| 57 | png_warning(png_ptr,
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| 58 | "Ignoring attempt to set chromaticity value exceeding 21474.83");
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| 59 | return;
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| 60 | }
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| 61 |
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| 62 | info_ptr->x_white = (float)white_x;
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| 63 | info_ptr->y_white = (float)white_y;
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| 64 | info_ptr->x_red = (float)red_x;
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| 65 | info_ptr->y_red = (float)red_y;
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| 66 | info_ptr->x_green = (float)green_x;
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| 67 | info_ptr->y_green = (float)green_y;
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| 68 | info_ptr->x_blue = (float)blue_x;
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| 69 | info_ptr->y_blue = (float)blue_y;
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| 70 | #ifdef PNG_FIXED_POINT_SUPPORTED
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| 71 | info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
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| 72 | info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
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| 73 | info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
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| 74 | info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
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| 75 | info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
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| 76 | info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
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| 77 | info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
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| 78 | info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
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| 79 | #endif
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| 80 | info_ptr->valid |= PNG_INFO_cHRM;
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| 81 | }
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| 82 | #endif
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| 83 | #ifdef PNG_FIXED_POINT_SUPPORTED
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| 84 | void PNGAPI
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| 85 | png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
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| 86 | png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
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| 87 | png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
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| 88 | png_fixed_point blue_x, png_fixed_point blue_y)
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| 89 | {
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| 90 | png_debug1(1, "in %s storage function\n", "cHRM");
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| 91 | if (png_ptr == NULL || info_ptr == NULL)
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| 92 | return;
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| 93 |
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| 94 | if (white_x < 0 || white_y < 0 ||
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| 95 | red_x < 0 || red_y < 0 ||
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| 96 | green_x < 0 || green_y < 0 ||
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| 97 | blue_x < 0 || blue_y < 0)
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| 98 | {
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| 99 | png_warning(png_ptr,
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| 100 | "Ignoring attempt to set negative chromaticity value");
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| 101 | return;
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| 102 | }
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| 103 | if (white_x > (double) PNG_MAX_UINT || white_y > (double) PNG_MAX_UINT ||
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| 104 | red_x > (double) PNG_MAX_UINT || red_y > (double) PNG_MAX_UINT ||
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| 105 | green_x > (double) PNG_MAX_UINT || green_y > (double) PNG_MAX_UINT ||
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| 106 | blue_x > (double) PNG_MAX_UINT || blue_y > (double) PNG_MAX_UINT)
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| 107 | {
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| 108 | png_warning(png_ptr,
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| 109 | "Ignoring attempt to set chromaticity value exceeding 21474.83");
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| 110 | return;
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| 111 | }
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| 112 | info_ptr->int_x_white = white_x;
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| 113 | info_ptr->int_y_white = white_y;
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| 114 | info_ptr->int_x_red = red_x;
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| 115 | info_ptr->int_y_red = red_y;
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| 116 | info_ptr->int_x_green = green_x;
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| 117 | info_ptr->int_y_green = green_y;
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| 118 | info_ptr->int_x_blue = blue_x;
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| 119 | info_ptr->int_y_blue = blue_y;
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| 120 | #ifdef PNG_FLOATING_POINT_SUPPORTED
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| 121 | info_ptr->x_white = (float)(white_x/100000.);
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| 122 | info_ptr->y_white = (float)(white_y/100000.);
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| 123 | info_ptr->x_red = (float)( red_x/100000.);
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| 124 | info_ptr->y_red = (float)( red_y/100000.);
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| 125 | info_ptr->x_green = (float)(green_x/100000.);
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| 126 | info_ptr->y_green = (float)(green_y/100000.);
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| 127 | info_ptr->x_blue = (float)( blue_x/100000.);
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| 128 | info_ptr->y_blue = (float)( blue_y/100000.);
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| 129 | #endif
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| 130 | info_ptr->valid |= PNG_INFO_cHRM;
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| 131 | }
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| 132 | #endif
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| 133 | #endif
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| 134 |
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| 135 | #if defined(PNG_gAMA_SUPPORTED)
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| 136 | #ifdef PNG_FLOATING_POINT_SUPPORTED
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| 137 | void PNGAPI
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| 138 | png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
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| 139 | {
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| 140 | double gamma;
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| 141 | png_debug1(1, "in %s storage function\n", "gAMA");
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| 142 | if (png_ptr == NULL || info_ptr == NULL)
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| 143 | return;
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| 144 |
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| 145 | /* Check for overflow */
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| 146 | if (file_gamma > 21474.83)
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| 147 | {
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| 148 | png_warning(png_ptr, "Limiting gamma to 21474.83");
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| 149 | gamma=21474.83;
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| 150 | }
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| 151 | else
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| 152 | gamma=file_gamma;
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| 153 | info_ptr->gamma = (float)gamma;
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| 154 | #ifdef PNG_FIXED_POINT_SUPPORTED
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| 155 | info_ptr->int_gamma = (int)(gamma*100000.+.5);
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| 156 | #endif
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| 157 | info_ptr->valid |= PNG_INFO_gAMA;
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| 158 | if(gamma == 0.0)
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| 159 | png_warning(png_ptr, "Setting gamma=0");
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| 160 | }
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| 161 | #endif
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| 162 | void PNGAPI
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| 163 | png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
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| 164 | int_gamma)
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| 165 | {
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| 166 | png_fixed_point gamma;
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| 167 |
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| 168 | png_debug1(1, "in %s storage function\n", "gAMA");
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| 169 | if (png_ptr == NULL || info_ptr == NULL)
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| 170 | return;
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| 171 |
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| 172 | if (int_gamma > (png_fixed_point) PNG_MAX_UINT)
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| 173 | {
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| 174 | png_warning(png_ptr, "Limiting gamma to 21474.83");
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| 175 | gamma=PNG_MAX_UINT;
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| 176 | }
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| 177 | else
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| 178 | {
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| 179 | if (int_gamma < 0)
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| 180 | {
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| 181 | png_warning(png_ptr, "Setting negative gamma to zero");
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| 182 | gamma=0;
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| 183 | }
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| 184 | else
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| 185 | gamma=int_gamma;
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| 186 | }
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| 187 | #ifdef PNG_FLOATING_POINT_SUPPORTED
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| 188 | info_ptr->gamma = (float)(gamma/100000.);
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| 189 | #endif
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| 190 | #ifdef PNG_FIXED_POINT_SUPPORTED
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| 191 | info_ptr->int_gamma = gamma;
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| 192 | #endif
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| 193 | info_ptr->valid |= PNG_INFO_gAMA;
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| 194 | if(gamma == 0)
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| 195 | png_warning(png_ptr, "Setting gamma=0");
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| 196 | }
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| 197 | #endif
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| 198 |
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| 199 | #if defined(PNG_hIST_SUPPORTED)
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| 200 | void PNGAPI
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| 201 | png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
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| 202 | {
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| 203 | int i;
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| 204 |
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| 205 | png_debug1(1, "in %s storage function\n", "hIST");
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| 206 | if (png_ptr == NULL || info_ptr == NULL)
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| 207 | return;
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| 208 | if (info_ptr->num_palette == 0)
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| 209 | {
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| 210 | png_warning(png_ptr,
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| 211 | "Palette size 0, hIST allocation skipped.");
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| 212 | return;
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| 213 | }
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| 214 |
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| 215 | #ifdef PNG_FREE_ME_SUPPORTED
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| 216 | png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
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| 217 | #endif
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| 218 | /* Changed from info->num_palette to 256 in version 1.2.1 */
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| 219 | png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
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| 220 | (png_uint_32)(256 * sizeof (png_uint_16)));
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| 221 | if (png_ptr->hist == NULL)
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| 222 | {
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| 223 | png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
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| 224 | return;
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| 225 | }
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| 226 |
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| 227 | for (i = 0; i < info_ptr->num_palette; i++)
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| 228 | png_ptr->hist[i] = hist[i];
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| 229 | info_ptr->hist = png_ptr->hist;
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| 230 | info_ptr->valid |= PNG_INFO_hIST;
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| 231 |
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| 232 | #ifdef PNG_FREE_ME_SUPPORTED
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| 233 | info_ptr->free_me |= PNG_FREE_HIST;
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| 234 | #else
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| 235 | png_ptr->flags |= PNG_FLAG_FREE_HIST;
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| 236 | #endif
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| 237 | }
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| 238 | #endif
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| 239 |
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| 240 | void PNGAPI
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| 241 | png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
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| 242 | png_uint_32 width, png_uint_32 height, int bit_depth,
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| 243 | int color_type, int interlace_type, int compression_type,
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| 244 | int filter_type)
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| 245 | {
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| 246 | int rowbytes_per_pixel;
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| 247 | png_debug1(1, "in %s storage function\n", "IHDR");
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| 248 | if (png_ptr == NULL || info_ptr == NULL)
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| 249 | return;
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| 250 |
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| 251 | /* check for width and height valid values */
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| 252 | if (width == 0 || height == 0)
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| 253 | png_error(png_ptr, "Image width or height is zero in IHDR");
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| 254 | if (width > PNG_MAX_UINT || height > PNG_MAX_UINT)
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| 255 | png_error(png_ptr, "Invalid image size in IHDR");
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| 256 |
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| 257 | /* check other values */
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| 258 | if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
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| 259 | bit_depth != 8 && bit_depth != 16)
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| 260 | png_error(png_ptr, "Invalid bit depth in IHDR");
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| 261 |
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| 262 | if (color_type < 0 || color_type == 1 ||
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| 263 | color_type == 5 || color_type > 6)
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| 264 | png_error(png_ptr, "Invalid color type in IHDR");
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| 265 |
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| 266 | if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
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| 267 | ((color_type == PNG_COLOR_TYPE_RGB ||
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| 268 | color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
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| 269 | color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
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| 270 | png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
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| 271 |
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| 272 | if (interlace_type >= PNG_INTERLACE_LAST)
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| 273 | png_error(png_ptr, "Unknown interlace method in IHDR");
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| 274 |
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| 275 | if (compression_type != PNG_COMPRESSION_TYPE_BASE)
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| 276 | png_error(png_ptr, "Unknown compression method in IHDR");
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| 277 |
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| 278 | #if defined(PNG_MNG_FEATURES_SUPPORTED)
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| 279 | /* Accept filter_method 64 (intrapixel differencing) only if
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| 280 | * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
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| 281 | * 2. Libpng did not read a PNG signature (this filter_method is only
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| 282 | * used in PNG datastreams that are embedded in MNG datastreams) and
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| 283 | * 3. The application called png_permit_mng_features with a mask that
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| 284 | * included PNG_FLAG_MNG_FILTER_64 and
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| 285 | * 4. The filter_method is 64 and
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| 286 | * 5. The color_type is RGB or RGBA
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| 287 | */
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| 288 | if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
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| 289 | png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
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| 290 | if(filter_type != PNG_FILTER_TYPE_BASE)
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| 291 | {
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| 292 | if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
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| 293 | (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
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| 294 | ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
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| 295 | (color_type == PNG_COLOR_TYPE_RGB ||
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| 296 | color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
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| 297 | png_error(png_ptr, "Unknown filter method in IHDR");
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| 298 | if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
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| 299 | png_warning(png_ptr, "Invalid filter method in IHDR");
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| 300 | }
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| 301 | #else
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| 302 | if(filter_type != PNG_FILTER_TYPE_BASE)
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| 303 | png_error(png_ptr, "Unknown filter method in IHDR");
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| 304 | #endif
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| 305 |
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| 306 | info_ptr->width = width;
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| 307 | info_ptr->height = height;
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| 308 | info_ptr->bit_depth = (png_byte)bit_depth;
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| 309 | info_ptr->color_type =(png_byte) color_type;
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| 310 | info_ptr->compression_type = (png_byte)compression_type;
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| 311 | info_ptr->filter_type = (png_byte)filter_type;
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| 312 | info_ptr->interlace_type = (png_byte)interlace_type;
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| 313 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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| 314 | info_ptr->channels = 1;
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| 315 | else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
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| 316 | info_ptr->channels = 3;
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| 317 | else
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| 318 | info_ptr->channels = 1;
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| 319 | if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
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| 320 | info_ptr->channels++;
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| 321 | info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
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| 322 |
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| 323 | /* check for overflow */
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| 324 | rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3;
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| 325 | if ( width > PNG_MAX_UINT/rowbytes_per_pixel - 64)
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| 326 | {
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| 327 | png_warning(png_ptr,
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| 328 | "Width too large to process image data; rowbytes will overflow.");
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| 329 | info_ptr->rowbytes = (png_size_t)0;
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| 330 | }
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| 331 | else
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| 332 | info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3;
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| 333 | }
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| 334 |
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| 335 | #if defined(PNG_oFFs_SUPPORTED)
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| 336 | void PNGAPI
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| 337 | png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
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| 338 | png_int_32 offset_x, png_int_32 offset_y, int unit_type)
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| 339 | {
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| 340 | png_debug1(1, "in %s storage function\n", "oFFs");
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| 341 | if (png_ptr == NULL || info_ptr == NULL)
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| 342 | return;
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| 343 |
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| 344 | info_ptr->x_offset = offset_x;
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| 345 | info_ptr->y_offset = offset_y;
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| 346 | info_ptr->offset_unit_type = (png_byte)unit_type;
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| 347 | info_ptr->valid |= PNG_INFO_oFFs;
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| 348 | }
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| 349 | #endif
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| 350 |
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| 351 | #if defined(PNG_pCAL_SUPPORTED)
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| 352 | void PNGAPI
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| 353 | png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
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| 354 | png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
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| 355 | png_charp units, png_charpp params)
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| 356 | {
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| 357 | png_uint_32 length;
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| 358 | int i;
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| 359 |
|
|---|
| 360 | png_debug1(1, "in %s storage function\n", "pCAL");
|
|---|
| 361 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 362 | return;
|
|---|
| 363 |
|
|---|
| 364 | length = png_strlen(purpose) + 1;
|
|---|
| 365 | png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
|
|---|
| 366 | info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
|
|---|
| 367 | if (info_ptr->pcal_purpose == NULL)
|
|---|
| 368 | {
|
|---|
| 369 | png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
|
|---|
| 370 | return;
|
|---|
| 371 | }
|
|---|
| 372 | png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
|
|---|
| 373 |
|
|---|
| 374 | png_debug(3, "storing X0, X1, type, and nparams in info\n");
|
|---|
| 375 | info_ptr->pcal_X0 = X0;
|
|---|
| 376 | info_ptr->pcal_X1 = X1;
|
|---|
| 377 | info_ptr->pcal_type = (png_byte)type;
|
|---|
| 378 | info_ptr->pcal_nparams = (png_byte)nparams;
|
|---|
| 379 |
|
|---|
| 380 | length = png_strlen(units) + 1;
|
|---|
| 381 | png_debug1(3, "allocating units for info (%lu bytes)\n", length);
|
|---|
| 382 | info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
|
|---|
| 383 | if (info_ptr->pcal_units == NULL)
|
|---|
| 384 | {
|
|---|
| 385 | png_warning(png_ptr, "Insufficient memory for pCAL units.");
|
|---|
| 386 | return;
|
|---|
| 387 | }
|
|---|
| 388 | png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
|
|---|
| 389 |
|
|---|
| 390 | info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
|
|---|
| 391 | (png_uint_32)((nparams + 1) * sizeof(png_charp)));
|
|---|
| 392 | if (info_ptr->pcal_params == NULL)
|
|---|
| 393 | {
|
|---|
| 394 | png_warning(png_ptr, "Insufficient memory for pCAL params.");
|
|---|
| 395 | return;
|
|---|
| 396 | }
|
|---|
| 397 |
|
|---|
| 398 | info_ptr->pcal_params[nparams] = NULL;
|
|---|
| 399 |
|
|---|
| 400 | for (i = 0; i < nparams; i++)
|
|---|
| 401 | {
|
|---|
| 402 | length = png_strlen(params[i]) + 1;
|
|---|
| 403 | png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
|
|---|
| 404 | info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
|
|---|
| 405 | if (info_ptr->pcal_params[i] == NULL)
|
|---|
| 406 | {
|
|---|
| 407 | png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
|
|---|
| 408 | return;
|
|---|
| 409 | }
|
|---|
| 410 | png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
|
|---|
| 411 | }
|
|---|
| 412 |
|
|---|
| 413 | info_ptr->valid |= PNG_INFO_pCAL;
|
|---|
| 414 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 415 | info_ptr->free_me |= PNG_FREE_PCAL;
|
|---|
| 416 | #endif
|
|---|
| 417 | }
|
|---|
| 418 | #endif
|
|---|
| 419 |
|
|---|
| 420 | #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
|
|---|
| 421 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|---|
| 422 | void PNGAPI
|
|---|
| 423 | png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 424 | int unit, double width, double height)
|
|---|
| 425 | {
|
|---|
| 426 | png_debug1(1, "in %s storage function\n", "sCAL");
|
|---|
| 427 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 428 | return;
|
|---|
| 429 |
|
|---|
| 430 | info_ptr->scal_unit = (png_byte)unit;
|
|---|
| 431 | info_ptr->scal_pixel_width = width;
|
|---|
| 432 | info_ptr->scal_pixel_height = height;
|
|---|
| 433 |
|
|---|
| 434 | info_ptr->valid |= PNG_INFO_sCAL;
|
|---|
| 435 | }
|
|---|
| 436 | #else
|
|---|
| 437 | #ifdef PNG_FIXED_POINT_SUPPORTED
|
|---|
| 438 | void PNGAPI
|
|---|
| 439 | png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 440 | int unit, png_charp swidth, png_charp sheight)
|
|---|
| 441 | {
|
|---|
| 442 | png_uint_32 length;
|
|---|
| 443 |
|
|---|
| 444 | png_debug1(1, "in %s storage function\n", "sCAL");
|
|---|
| 445 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 446 | return;
|
|---|
| 447 |
|
|---|
| 448 | info_ptr->scal_unit = (png_byte)unit;
|
|---|
| 449 |
|
|---|
| 450 | length = png_strlen(swidth) + 1;
|
|---|
| 451 | png_debug1(3, "allocating unit for info (%d bytes)\n", length);
|
|---|
| 452 | info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length);
|
|---|
| 453 | png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
|
|---|
| 454 |
|
|---|
| 455 | length = png_strlen(sheight) + 1;
|
|---|
| 456 | png_debug1(3, "allocating unit for info (%d bytes)\n", length);
|
|---|
| 457 | info_ptr->scal_s_height = (png_charp)png_malloc(png_ptr, length);
|
|---|
| 458 | png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
|
|---|
| 459 |
|
|---|
| 460 | info_ptr->valid |= PNG_INFO_sCAL;
|
|---|
| 461 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 462 | info_ptr->free_me |= PNG_FREE_SCAL;
|
|---|
| 463 | #endif
|
|---|
| 464 | }
|
|---|
| 465 | #endif
|
|---|
| 466 | #endif
|
|---|
| 467 | #endif
|
|---|
| 468 |
|
|---|
| 469 | #if defined(PNG_pHYs_SUPPORTED)
|
|---|
| 470 | void PNGAPI
|
|---|
| 471 | png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 472 | png_uint_32 res_x, png_uint_32 res_y, int unit_type)
|
|---|
| 473 | {
|
|---|
| 474 | png_debug1(1, "in %s storage function\n", "pHYs");
|
|---|
| 475 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 476 | return;
|
|---|
| 477 |
|
|---|
| 478 | info_ptr->x_pixels_per_unit = res_x;
|
|---|
| 479 | info_ptr->y_pixels_per_unit = res_y;
|
|---|
| 480 | info_ptr->phys_unit_type = (png_byte)unit_type;
|
|---|
| 481 | info_ptr->valid |= PNG_INFO_pHYs;
|
|---|
| 482 | }
|
|---|
| 483 | #endif
|
|---|
| 484 |
|
|---|
| 485 | void PNGAPI
|
|---|
| 486 | png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 487 | png_colorp palette, int num_palette)
|
|---|
| 488 | {
|
|---|
| 489 |
|
|---|
| 490 | png_debug1(1, "in %s storage function\n", "PLTE");
|
|---|
| 491 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 492 | return;
|
|---|
| 493 |
|
|---|
| 494 | /*
|
|---|
| 495 | * It may not actually be necessary to set png_ptr->palette here;
|
|---|
| 496 | * we do it for backward compatibility with the way the png_handle_tRNS
|
|---|
| 497 | * function used to do the allocation.
|
|---|
| 498 | */
|
|---|
| 499 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 500 | png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
|
|---|
| 501 | #endif
|
|---|
| 502 | /* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
|
|---|
| 503 | in case of an invalid PNG file that has too-large sample values. */
|
|---|
| 504 | png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)256,
|
|---|
| 505 | sizeof (png_color));
|
|---|
| 506 | if (png_ptr->palette == NULL)
|
|---|
| 507 | png_error(png_ptr, "Unable to malloc palette");
|
|---|
| 508 | png_memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color));
|
|---|
| 509 | info_ptr->palette = png_ptr->palette;
|
|---|
| 510 | info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
|
|---|
| 511 |
|
|---|
| 512 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 513 | info_ptr->free_me |= PNG_FREE_PLTE;
|
|---|
| 514 | #else
|
|---|
| 515 | png_ptr->flags |= PNG_FLAG_FREE_PLTE;
|
|---|
| 516 | #endif
|
|---|
| 517 |
|
|---|
| 518 | info_ptr->valid |= PNG_INFO_PLTE;
|
|---|
| 519 | }
|
|---|
| 520 |
|
|---|
| 521 | #if defined(PNG_sBIT_SUPPORTED)
|
|---|
| 522 | void PNGAPI
|
|---|
| 523 | png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 524 | png_color_8p sig_bit)
|
|---|
| 525 | {
|
|---|
| 526 | png_debug1(1, "in %s storage function\n", "sBIT");
|
|---|
| 527 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 528 | return;
|
|---|
| 529 |
|
|---|
| 530 | png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8));
|
|---|
| 531 | info_ptr->valid |= PNG_INFO_sBIT;
|
|---|
| 532 | }
|
|---|
| 533 | #endif
|
|---|
| 534 |
|
|---|
| 535 | #if defined(PNG_sRGB_SUPPORTED)
|
|---|
| 536 | void PNGAPI
|
|---|
| 537 | png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
|
|---|
| 538 | {
|
|---|
| 539 | png_debug1(1, "in %s storage function\n", "sRGB");
|
|---|
| 540 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 541 | return;
|
|---|
| 542 |
|
|---|
| 543 | info_ptr->srgb_intent = (png_byte)intent;
|
|---|
| 544 | info_ptr->valid |= PNG_INFO_sRGB;
|
|---|
| 545 | }
|
|---|
| 546 |
|
|---|
| 547 | void PNGAPI
|
|---|
| 548 | png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 549 | int intent)
|
|---|
| 550 | {
|
|---|
| 551 | #if defined(PNG_gAMA_SUPPORTED)
|
|---|
| 552 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|---|
| 553 | float file_gamma;
|
|---|
| 554 | #endif
|
|---|
| 555 | #ifdef PNG_FIXED_POINT_SUPPORTED
|
|---|
| 556 | png_fixed_point int_file_gamma;
|
|---|
| 557 | #endif
|
|---|
| 558 | #endif
|
|---|
| 559 | #if defined(PNG_cHRM_SUPPORTED)
|
|---|
| 560 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|---|
| 561 | float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
|
|---|
| 562 | #endif
|
|---|
| 563 | #ifdef PNG_FIXED_POINT_SUPPORTED
|
|---|
| 564 | png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
|
|---|
| 565 | int_green_y, int_blue_x, int_blue_y;
|
|---|
| 566 | #endif
|
|---|
| 567 | #endif
|
|---|
| 568 | png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
|
|---|
| 569 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 570 | return;
|
|---|
| 571 |
|
|---|
| 572 | png_set_sRGB(png_ptr, info_ptr, intent);
|
|---|
| 573 |
|
|---|
| 574 | #if defined(PNG_gAMA_SUPPORTED)
|
|---|
| 575 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|---|
| 576 | file_gamma = (float).45455;
|
|---|
| 577 | png_set_gAMA(png_ptr, info_ptr, file_gamma);
|
|---|
| 578 | #endif
|
|---|
| 579 | #ifdef PNG_FIXED_POINT_SUPPORTED
|
|---|
| 580 | int_file_gamma = 45455L;
|
|---|
| 581 | png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
|
|---|
| 582 | #endif
|
|---|
| 583 | #endif
|
|---|
| 584 |
|
|---|
| 585 | #if defined(PNG_cHRM_SUPPORTED)
|
|---|
| 586 | #ifdef PNG_FIXED_POINT_SUPPORTED
|
|---|
| 587 | int_white_x = 31270L;
|
|---|
| 588 | int_white_y = 32900L;
|
|---|
| 589 | int_red_x = 64000L;
|
|---|
| 590 | int_red_y = 33000L;
|
|---|
| 591 | int_green_x = 30000L;
|
|---|
| 592 | int_green_y = 60000L;
|
|---|
| 593 | int_blue_x = 15000L;
|
|---|
| 594 | int_blue_y = 6000L;
|
|---|
| 595 |
|
|---|
| 596 | png_set_cHRM_fixed(png_ptr, info_ptr,
|
|---|
| 597 | int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
|
|---|
| 598 | int_blue_x, int_blue_y);
|
|---|
| 599 | #endif
|
|---|
| 600 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|---|
| 601 | white_x = (float).3127;
|
|---|
| 602 | white_y = (float).3290;
|
|---|
| 603 | red_x = (float).64;
|
|---|
| 604 | red_y = (float).33;
|
|---|
| 605 | green_x = (float).30;
|
|---|
| 606 | green_y = (float).60;
|
|---|
| 607 | blue_x = (float).15;
|
|---|
| 608 | blue_y = (float).06;
|
|---|
| 609 |
|
|---|
| 610 | png_set_cHRM(png_ptr, info_ptr,
|
|---|
| 611 | white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
|
|---|
| 612 | #endif
|
|---|
| 613 | #endif
|
|---|
| 614 | }
|
|---|
| 615 | #endif
|
|---|
| 616 |
|
|---|
| 617 |
|
|---|
| 618 | #if defined(PNG_iCCP_SUPPORTED)
|
|---|
| 619 | void PNGAPI
|
|---|
| 620 | png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 621 | png_charp name, int compression_type,
|
|---|
| 622 | png_charp profile, png_uint_32 proflen)
|
|---|
| 623 | {
|
|---|
| 624 | png_charp new_iccp_name;
|
|---|
| 625 | png_charp new_iccp_profile;
|
|---|
| 626 |
|
|---|
| 627 | png_debug1(1, "in %s storage function\n", "iCCP");
|
|---|
| 628 | if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
|
|---|
| 629 | return;
|
|---|
| 630 |
|
|---|
| 631 | new_iccp_name = (png_charp)png_malloc(png_ptr, png_strlen(name)+1);
|
|---|
| 632 | png_strcpy(new_iccp_name, name);
|
|---|
| 633 | new_iccp_profile = (png_charp)png_malloc(png_ptr, proflen);
|
|---|
| 634 | png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
|
|---|
| 635 |
|
|---|
| 636 | png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
|
|---|
| 637 |
|
|---|
| 638 | info_ptr->iccp_proflen = proflen;
|
|---|
| 639 | info_ptr->iccp_name = new_iccp_name;
|
|---|
| 640 | info_ptr->iccp_profile = new_iccp_profile;
|
|---|
| 641 | /* Compression is always zero but is here so the API and info structure
|
|---|
| 642 | * does not have to change if we introduce multiple compression types */
|
|---|
| 643 | info_ptr->iccp_compression = (png_byte)compression_type;
|
|---|
| 644 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 645 | info_ptr->free_me |= PNG_FREE_ICCP;
|
|---|
| 646 | #endif
|
|---|
| 647 | info_ptr->valid |= PNG_INFO_iCCP;
|
|---|
| 648 | }
|
|---|
| 649 | #endif
|
|---|
| 650 |
|
|---|
| 651 | #if defined(PNG_TEXT_SUPPORTED)
|
|---|
| 652 | void PNGAPI
|
|---|
| 653 | png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
|
|---|
| 654 | int num_text)
|
|---|
| 655 | {
|
|---|
| 656 | int ret;
|
|---|
| 657 | ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
|
|---|
| 658 | if (ret)
|
|---|
| 659 | png_error(png_ptr, "Insufficient memory to store text");
|
|---|
| 660 | }
|
|---|
| 661 |
|
|---|
| 662 | int /* PRIVATE */
|
|---|
| 663 | png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
|
|---|
| 664 | int num_text)
|
|---|
| 665 | {
|
|---|
| 666 | int i;
|
|---|
| 667 |
|
|---|
| 668 | png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
|
|---|
| 669 | "text" : (png_const_charp)png_ptr->chunk_name));
|
|---|
| 670 |
|
|---|
| 671 | if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
|
|---|
| 672 | return(0);
|
|---|
| 673 |
|
|---|
| 674 | /* Make sure we have enough space in the "text" array in info_struct
|
|---|
| 675 | * to hold all of the incoming text_ptr objects.
|
|---|
| 676 | */
|
|---|
| 677 | if (info_ptr->num_text + num_text > info_ptr->max_text)
|
|---|
| 678 | {
|
|---|
| 679 | if (info_ptr->text != NULL)
|
|---|
| 680 | {
|
|---|
| 681 | png_textp old_text;
|
|---|
| 682 | int old_max;
|
|---|
| 683 |
|
|---|
| 684 | old_max = info_ptr->max_text;
|
|---|
| 685 | info_ptr->max_text = info_ptr->num_text + num_text + 8;
|
|---|
| 686 | old_text = info_ptr->text;
|
|---|
| 687 | info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
|
|---|
| 688 | (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
|
|---|
| 689 | if (info_ptr->text == NULL)
|
|---|
| 690 | {
|
|---|
| 691 | png_free(png_ptr, old_text);
|
|---|
| 692 | return(1);
|
|---|
| 693 | }
|
|---|
| 694 | png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
|
|---|
| 695 | sizeof(png_text)));
|
|---|
| 696 | png_free(png_ptr, old_text);
|
|---|
| 697 | }
|
|---|
| 698 | else
|
|---|
| 699 | {
|
|---|
| 700 | info_ptr->max_text = num_text + 8;
|
|---|
| 701 | info_ptr->num_text = 0;
|
|---|
| 702 | info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
|
|---|
| 703 | (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
|
|---|
| 704 | if (info_ptr->text == NULL)
|
|---|
| 705 | return(1);
|
|---|
| 706 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 707 | info_ptr->free_me |= PNG_FREE_TEXT;
|
|---|
| 708 | #endif
|
|---|
| 709 | }
|
|---|
| 710 | png_debug1(3, "allocated %d entries for info_ptr->text\n",
|
|---|
| 711 | info_ptr->max_text);
|
|---|
| 712 | }
|
|---|
| 713 | for (i = 0; i < num_text; i++)
|
|---|
| 714 | {
|
|---|
| 715 | png_size_t text_length,key_len;
|
|---|
| 716 | png_size_t lang_len,lang_key_len;
|
|---|
| 717 | png_textp textp = &(info_ptr->text[info_ptr->num_text]);
|
|---|
| 718 |
|
|---|
| 719 | if (text_ptr[i].key == NULL)
|
|---|
| 720 | continue;
|
|---|
| 721 |
|
|---|
| 722 | key_len = png_strlen(text_ptr[i].key);
|
|---|
| 723 |
|
|---|
| 724 | if(text_ptr[i].compression <= 0)
|
|---|
| 725 | {
|
|---|
| 726 | lang_len = 0;
|
|---|
| 727 | lang_key_len = 0;
|
|---|
| 728 | }
|
|---|
| 729 | else
|
|---|
| 730 | #ifdef PNG_iTXt_SUPPORTED
|
|---|
| 731 | {
|
|---|
| 732 | /* set iTXt data */
|
|---|
| 733 | if (text_ptr[i].lang != NULL)
|
|---|
| 734 | lang_len = png_strlen(text_ptr[i].lang);
|
|---|
| 735 | else
|
|---|
| 736 | lang_len = 0;
|
|---|
| 737 | if (text_ptr[i].lang_key != NULL)
|
|---|
| 738 | lang_key_len = png_strlen(text_ptr[i].lang_key);
|
|---|
| 739 | else
|
|---|
| 740 | lang_key_len = 0;
|
|---|
| 741 | }
|
|---|
| 742 | #else
|
|---|
| 743 | {
|
|---|
| 744 | png_warning(png_ptr, "iTXt chunk not supported.");
|
|---|
| 745 | continue;
|
|---|
| 746 | }
|
|---|
| 747 | #endif
|
|---|
| 748 |
|
|---|
| 749 | if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
|
|---|
| 750 | {
|
|---|
| 751 | text_length = 0;
|
|---|
| 752 | #ifdef PNG_iTXt_SUPPORTED
|
|---|
| 753 | if(text_ptr[i].compression > 0)
|
|---|
| 754 | textp->compression = PNG_ITXT_COMPRESSION_NONE;
|
|---|
| 755 | else
|
|---|
| 756 | #endif
|
|---|
| 757 | textp->compression = PNG_TEXT_COMPRESSION_NONE;
|
|---|
| 758 | }
|
|---|
| 759 | else
|
|---|
| 760 | {
|
|---|
| 761 | text_length = png_strlen(text_ptr[i].text);
|
|---|
| 762 | textp->compression = text_ptr[i].compression;
|
|---|
| 763 | }
|
|---|
| 764 |
|
|---|
| 765 | textp->key = (png_charp)png_malloc_warn(png_ptr,
|
|---|
| 766 | (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
|
|---|
| 767 | if (textp->key == NULL)
|
|---|
| 768 | return(1);
|
|---|
| 769 | png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
|
|---|
| 770 | (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
|
|---|
| 771 | (int)textp->key);
|
|---|
| 772 |
|
|---|
| 773 | png_memcpy(textp->key, text_ptr[i].key,
|
|---|
| 774 | (png_size_t)(key_len));
|
|---|
| 775 | *(textp->key+key_len) = '\0';
|
|---|
| 776 | #ifdef PNG_iTXt_SUPPORTED
|
|---|
| 777 | if (text_ptr[i].compression > 0)
|
|---|
| 778 | {
|
|---|
| 779 | textp->lang=textp->key + key_len + 1;
|
|---|
| 780 | png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
|
|---|
| 781 | *(textp->lang+lang_len) = '\0';
|
|---|
| 782 | textp->lang_key=textp->lang + lang_len + 1;
|
|---|
| 783 | png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
|
|---|
| 784 | *(textp->lang_key+lang_key_len) = '\0';
|
|---|
| 785 | textp->text=textp->lang_key + lang_key_len + 1;
|
|---|
| 786 | }
|
|---|
| 787 | else
|
|---|
| 788 | #endif
|
|---|
| 789 | {
|
|---|
| 790 | #ifdef PNG_iTXt_SUPPORTED
|
|---|
| 791 | textp->lang=NULL;
|
|---|
| 792 | textp->lang_key=NULL;
|
|---|
| 793 | #endif
|
|---|
| 794 | textp->text=textp->key + key_len + 1;
|
|---|
| 795 | }
|
|---|
| 796 | if(text_length)
|
|---|
| 797 | png_memcpy(textp->text, text_ptr[i].text,
|
|---|
| 798 | (png_size_t)(text_length));
|
|---|
| 799 | *(textp->text+text_length) = '\0';
|
|---|
| 800 |
|
|---|
| 801 | #ifdef PNG_iTXt_SUPPORTED
|
|---|
| 802 | if(textp->compression > 0)
|
|---|
| 803 | {
|
|---|
| 804 | textp->text_length = 0;
|
|---|
| 805 | textp->itxt_length = text_length;
|
|---|
| 806 | }
|
|---|
| 807 | else
|
|---|
| 808 | #endif
|
|---|
| 809 | {
|
|---|
| 810 | textp->text_length = text_length;
|
|---|
| 811 | #ifdef PNG_iTXt_SUPPORTED
|
|---|
| 812 | textp->itxt_length = 0;
|
|---|
| 813 | #endif
|
|---|
| 814 | }
|
|---|
| 815 | info_ptr->text[info_ptr->num_text]= *textp;
|
|---|
| 816 | info_ptr->num_text++;
|
|---|
| 817 | png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
|
|---|
| 818 | }
|
|---|
| 819 | return(0);
|
|---|
| 820 | }
|
|---|
| 821 | #endif
|
|---|
| 822 |
|
|---|
| 823 | #if defined(PNG_tIME_SUPPORTED)
|
|---|
| 824 | void PNGAPI
|
|---|
| 825 | png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
|
|---|
| 826 | {
|
|---|
| 827 | png_debug1(1, "in %s storage function\n", "tIME");
|
|---|
| 828 | if (png_ptr == NULL || info_ptr == NULL ||
|
|---|
| 829 | (png_ptr->mode & PNG_WROTE_tIME))
|
|---|
| 830 | return;
|
|---|
| 831 |
|
|---|
| 832 | png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time));
|
|---|
| 833 | info_ptr->valid |= PNG_INFO_tIME;
|
|---|
| 834 | }
|
|---|
| 835 | #endif
|
|---|
| 836 |
|
|---|
| 837 | #if defined(PNG_tRNS_SUPPORTED)
|
|---|
| 838 | void PNGAPI
|
|---|
| 839 | png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 840 | png_bytep trans, int num_trans, png_color_16p trans_values)
|
|---|
| 841 | {
|
|---|
| 842 | png_debug1(1, "in %s storage function\n", "tRNS");
|
|---|
| 843 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 844 | return;
|
|---|
| 845 |
|
|---|
| 846 | if (trans != NULL)
|
|---|
| 847 | {
|
|---|
| 848 | /*
|
|---|
| 849 | * It may not actually be necessary to set png_ptr->trans here;
|
|---|
| 850 | * we do it for backward compatibility with the way the png_handle_tRNS
|
|---|
| 851 | * function used to do the allocation.
|
|---|
| 852 | */
|
|---|
| 853 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 854 | png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
|
|---|
| 855 | #endif
|
|---|
| 856 | /* Changed from num_trans to 256 in version 1.2.1 */
|
|---|
| 857 | png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
|
|---|
| 858 | (png_uint_32)256);
|
|---|
| 859 | png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
|
|---|
| 860 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 861 | info_ptr->free_me |= PNG_FREE_TRNS;
|
|---|
| 862 | #else
|
|---|
| 863 | png_ptr->flags |= PNG_FLAG_FREE_TRNS;
|
|---|
| 864 | #endif
|
|---|
| 865 | }
|
|---|
| 866 |
|
|---|
| 867 | if (trans_values != NULL)
|
|---|
| 868 | {
|
|---|
| 869 | png_memcpy(&(info_ptr->trans_values), trans_values,
|
|---|
| 870 | sizeof(png_color_16));
|
|---|
| 871 | if (num_trans == 0)
|
|---|
| 872 | num_trans = 1;
|
|---|
| 873 | }
|
|---|
| 874 | info_ptr->num_trans = (png_uint_16)num_trans;
|
|---|
| 875 | info_ptr->valid |= PNG_INFO_tRNS;
|
|---|
| 876 | }
|
|---|
| 877 | #endif
|
|---|
| 878 |
|
|---|
| 879 | #if defined(PNG_sPLT_SUPPORTED)
|
|---|
| 880 | void PNGAPI
|
|---|
| 881 | png_set_sPLT(png_structp png_ptr,
|
|---|
| 882 | png_infop info_ptr, png_sPLT_tp entries, int nentries)
|
|---|
| 883 | {
|
|---|
| 884 | png_sPLT_tp np;
|
|---|
| 885 | int i;
|
|---|
| 886 |
|
|---|
| 887 | np = (png_sPLT_tp)png_malloc_warn(png_ptr,
|
|---|
| 888 | (info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t));
|
|---|
| 889 | if (np == NULL)
|
|---|
| 890 | {
|
|---|
| 891 | png_warning(png_ptr, "No memory for sPLT palettes.");
|
|---|
| 892 | return;
|
|---|
| 893 | }
|
|---|
| 894 |
|
|---|
| 895 | png_memcpy(np, info_ptr->splt_palettes,
|
|---|
| 896 | info_ptr->splt_palettes_num * sizeof(png_sPLT_t));
|
|---|
| 897 | png_free(png_ptr, info_ptr->splt_palettes);
|
|---|
| 898 | info_ptr->splt_palettes=NULL;
|
|---|
| 899 |
|
|---|
| 900 | for (i = 0; i < nentries; i++)
|
|---|
| 901 | {
|
|---|
| 902 | png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
|
|---|
| 903 | png_sPLT_tp from = entries + i;
|
|---|
| 904 |
|
|---|
| 905 | to->name = (png_charp)png_malloc(png_ptr,
|
|---|
| 906 | png_strlen(from->name) + 1);
|
|---|
| 907 | png_strcpy(to->name, from->name);
|
|---|
| 908 | to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
|
|---|
| 909 | from->nentries * sizeof(png_sPLT_t));
|
|---|
| 910 | png_memcpy(to->entries, from->entries,
|
|---|
| 911 | from->nentries * sizeof(png_sPLT_t));
|
|---|
| 912 | to->nentries = from->nentries;
|
|---|
| 913 | to->depth = from->depth;
|
|---|
| 914 | }
|
|---|
| 915 |
|
|---|
| 916 | info_ptr->splt_palettes = np;
|
|---|
| 917 | info_ptr->splt_palettes_num += nentries;
|
|---|
| 918 | info_ptr->valid |= PNG_INFO_sPLT;
|
|---|
| 919 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 920 | info_ptr->free_me |= PNG_FREE_SPLT;
|
|---|
| 921 | #endif
|
|---|
| 922 | }
|
|---|
| 923 | #endif /* PNG_sPLT_SUPPORTED */
|
|---|
| 924 |
|
|---|
| 925 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
|---|
| 926 | void PNGAPI
|
|---|
| 927 | png_set_unknown_chunks(png_structp png_ptr,
|
|---|
| 928 | png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
|
|---|
| 929 | {
|
|---|
| 930 | png_unknown_chunkp np;
|
|---|
| 931 | int i;
|
|---|
| 932 |
|
|---|
| 933 | if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
|
|---|
| 934 | return;
|
|---|
| 935 |
|
|---|
| 936 | np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
|
|---|
| 937 | (info_ptr->unknown_chunks_num + num_unknowns) *
|
|---|
| 938 | sizeof(png_unknown_chunk));
|
|---|
| 939 | if (np == NULL)
|
|---|
| 940 | {
|
|---|
| 941 | png_warning(png_ptr, "Out of memory while processing unknown chunk.");
|
|---|
| 942 | return;
|
|---|
| 943 | }
|
|---|
| 944 |
|
|---|
| 945 | png_memcpy(np, info_ptr->unknown_chunks,
|
|---|
| 946 | info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk));
|
|---|
| 947 | png_free(png_ptr, info_ptr->unknown_chunks);
|
|---|
| 948 | info_ptr->unknown_chunks=NULL;
|
|---|
| 949 |
|
|---|
| 950 | for (i = 0; i < num_unknowns; i++)
|
|---|
| 951 | {
|
|---|
| 952 | png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
|
|---|
| 953 | png_unknown_chunkp from = unknowns + i;
|
|---|
| 954 |
|
|---|
| 955 | png_strcpy((png_charp)to->name, (png_charp)from->name);
|
|---|
| 956 | to->data = (png_bytep)png_malloc(png_ptr, from->size);
|
|---|
| 957 | if (to->data == NULL)
|
|---|
| 958 | png_warning(png_ptr, "Out of memory while processing unknown chunk.");
|
|---|
| 959 | else
|
|---|
| 960 | {
|
|---|
| 961 | png_memcpy(to->data, from->data, from->size);
|
|---|
| 962 | to->size = from->size;
|
|---|
| 963 |
|
|---|
| 964 | /* note our location in the read or write sequence */
|
|---|
| 965 | to->location = (png_byte)(png_ptr->mode & 0xff);
|
|---|
| 966 | }
|
|---|
| 967 | }
|
|---|
| 968 |
|
|---|
| 969 | info_ptr->unknown_chunks = np;
|
|---|
| 970 | info_ptr->unknown_chunks_num += num_unknowns;
|
|---|
| 971 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 972 | info_ptr->free_me |= PNG_FREE_UNKN;
|
|---|
| 973 | #endif
|
|---|
| 974 | }
|
|---|
| 975 | void PNGAPI
|
|---|
| 976 | png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
|
|---|
| 977 | int chunk, int location)
|
|---|
| 978 | {
|
|---|
| 979 | if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
|
|---|
| 980 | (int)info_ptr->unknown_chunks_num)
|
|---|
| 981 | info_ptr->unknown_chunks[chunk].location = (png_byte)location;
|
|---|
| 982 | }
|
|---|
| 983 | #endif
|
|---|
| 984 |
|
|---|
| 985 | #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
|
|---|
| 986 | defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
|
|---|
| 987 | void PNGAPI
|
|---|
| 988 | png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
|
|---|
| 989 | {
|
|---|
| 990 | /* This function is deprecated in favor of png_permit_mng_features()
|
|---|
| 991 | and will be removed from libpng-2.0.0 */
|
|---|
| 992 | png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
|
|---|
| 993 | if (png_ptr == NULL)
|
|---|
| 994 | return;
|
|---|
| 995 | png_ptr->mng_features_permitted = (png_byte)
|
|---|
| 996 | ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) |
|
|---|
| 997 | ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
|
|---|
| 998 | }
|
|---|
| 999 | #endif
|
|---|
| 1000 |
|
|---|
| 1001 | #if defined(PNG_MNG_FEATURES_SUPPORTED)
|
|---|
| 1002 | png_uint_32 PNGAPI
|
|---|
| 1003 | png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
|
|---|
| 1004 | {
|
|---|
| 1005 | png_debug(1, "in png_permit_mng_features\n");
|
|---|
| 1006 | if (png_ptr == NULL)
|
|---|
| 1007 | return (png_uint_32)0;
|
|---|
| 1008 | png_ptr->mng_features_permitted =
|
|---|
| 1009 | (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
|
|---|
| 1010 | return (png_uint_32)png_ptr->mng_features_permitted;
|
|---|
| 1011 | }
|
|---|
| 1012 | #endif
|
|---|
| 1013 |
|
|---|
| 1014 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
|---|
| 1015 | void PNGAPI
|
|---|
| 1016 | png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
|
|---|
| 1017 | chunk_list, int num_chunks)
|
|---|
| 1018 | {
|
|---|
| 1019 | png_bytep new_list, p;
|
|---|
| 1020 | int i, old_num_chunks;
|
|---|
| 1021 | if (num_chunks == 0)
|
|---|
| 1022 | {
|
|---|
| 1023 | if(keep == HANDLE_CHUNK_ALWAYS || keep == HANDLE_CHUNK_IF_SAFE)
|
|---|
| 1024 | png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
|
|---|
| 1025 | else
|
|---|
| 1026 | png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
|
|---|
| 1027 |
|
|---|
| 1028 | if(keep == HANDLE_CHUNK_ALWAYS)
|
|---|
| 1029 | png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
|
|---|
| 1030 | else
|
|---|
| 1031 | png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
|
|---|
| 1032 | return;
|
|---|
| 1033 | }
|
|---|
| 1034 | if (chunk_list == NULL)
|
|---|
| 1035 | return;
|
|---|
| 1036 | old_num_chunks=png_ptr->num_chunk_list;
|
|---|
| 1037 | new_list=(png_bytep)png_malloc(png_ptr,
|
|---|
| 1038 | (png_uint_32)(5*(num_chunks+old_num_chunks)));
|
|---|
| 1039 | if(png_ptr->chunk_list != NULL)
|
|---|
| 1040 | {
|
|---|
| 1041 | png_memcpy(new_list, png_ptr->chunk_list,
|
|---|
| 1042 | (png_size_t)(5*old_num_chunks));
|
|---|
| 1043 | png_free(png_ptr, png_ptr->chunk_list);
|
|---|
| 1044 | png_ptr->chunk_list=NULL;
|
|---|
| 1045 | }
|
|---|
| 1046 | png_memcpy(new_list+5*old_num_chunks, chunk_list,
|
|---|
| 1047 | (png_size_t)(5*num_chunks));
|
|---|
| 1048 | for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
|
|---|
| 1049 | *p=(png_byte)keep;
|
|---|
| 1050 | png_ptr->num_chunk_list=old_num_chunks+num_chunks;
|
|---|
| 1051 | png_ptr->chunk_list=new_list;
|
|---|
| 1052 | #ifdef PNG_FREE_ME_SUPPORTED
|
|---|
| 1053 | png_ptr->free_me |= PNG_FREE_LIST;
|
|---|
| 1054 | #endif
|
|---|
| 1055 | }
|
|---|
| 1056 | #endif
|
|---|
| 1057 |
|
|---|
| 1058 | #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
|
|---|
| 1059 | void PNGAPI
|
|---|
| 1060 | png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
|
|---|
| 1061 | png_user_chunk_ptr read_user_chunk_fn)
|
|---|
| 1062 | {
|
|---|
| 1063 | png_debug(1, "in png_set_read_user_chunk_fn\n");
|
|---|
| 1064 | png_ptr->read_user_chunk_fn = read_user_chunk_fn;
|
|---|
| 1065 | png_ptr->user_chunk_ptr = user_chunk_ptr;
|
|---|
| 1066 | }
|
|---|
| 1067 | #endif
|
|---|
| 1068 |
|
|---|
| 1069 | #if defined(PNG_INFO_IMAGE_SUPPORTED)
|
|---|
| 1070 | void PNGAPI
|
|---|
| 1071 | png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
|
|---|
| 1072 | {
|
|---|
| 1073 | png_debug1(1, "in %s storage function\n", "rows");
|
|---|
| 1074 |
|
|---|
| 1075 | if (png_ptr == NULL || info_ptr == NULL)
|
|---|
| 1076 | return;
|
|---|
| 1077 |
|
|---|
| 1078 | if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
|
|---|
| 1079 | png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
|
|---|
| 1080 | info_ptr->row_pointers = row_pointers;
|
|---|
| 1081 | if(row_pointers)
|
|---|
| 1082 | info_ptr->valid |= PNG_INFO_IDAT;
|
|---|
| 1083 | }
|
|---|
| 1084 | #endif
|
|---|
| 1085 |
|
|---|
| 1086 | void PNGAPI
|
|---|
| 1087 | png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
|
|---|
| 1088 | {
|
|---|
| 1089 | if(png_ptr->zbuf)
|
|---|
| 1090 | png_free(png_ptr, png_ptr->zbuf);
|
|---|
| 1091 | png_ptr->zbuf_size = (png_size_t)size;
|
|---|
| 1092 | png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
|
|---|
| 1093 | png_ptr->zstream.next_out = png_ptr->zbuf;
|
|---|
| 1094 | png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
|
|---|
| 1095 | }
|
|---|
| 1096 |
|
|---|
| 1097 | void PNGAPI
|
|---|
| 1098 | png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
|
|---|
| 1099 | {
|
|---|
| 1100 | if (png_ptr && info_ptr)
|
|---|
| 1101 | info_ptr->valid &= ~(mask);
|
|---|
| 1102 | }
|
|---|
| 1103 |
|
|---|
| 1104 |
|
|---|
| 1105 | #ifndef PNG_1_0_X
|
|---|
| 1106 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
|---|
| 1107 | /* this function was added to libpng 1.2.0 and should always exist by default */
|
|---|
| 1108 | void PNGAPI
|
|---|
| 1109 | png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
|
|---|
| 1110 | {
|
|---|
| 1111 | png_uint_32 settable_asm_flags;
|
|---|
| 1112 | png_uint_32 settable_mmx_flags;
|
|---|
| 1113 |
|
|---|
| 1114 | settable_mmx_flags =
|
|---|
| 1115 | #ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
|
|---|
| 1116 | PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
|
|---|
| 1117 | #endif
|
|---|
| 1118 | #ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
|
|---|
| 1119 | PNG_ASM_FLAG_MMX_READ_INTERLACE |
|
|---|
| 1120 | #endif
|
|---|
| 1121 | #ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
|
|---|
| 1122 | PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
|
|---|
| 1123 | PNG_ASM_FLAG_MMX_READ_FILTER_UP |
|
|---|
| 1124 | PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
|
|---|
| 1125 | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH |
|
|---|
| 1126 | #endif
|
|---|
| 1127 | 0;
|
|---|
| 1128 |
|
|---|
| 1129 | /* could be some non-MMX ones in the future, but not currently: */
|
|---|
| 1130 | settable_asm_flags = settable_mmx_flags;
|
|---|
| 1131 |
|
|---|
| 1132 | if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) ||
|
|---|
| 1133 | !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU))
|
|---|
| 1134 | {
|
|---|
| 1135 | /* clear all MMX flags if MMX isn't supported */
|
|---|
| 1136 | settable_asm_flags &= ~settable_mmx_flags;
|
|---|
| 1137 | png_ptr->asm_flags &= ~settable_mmx_flags;
|
|---|
| 1138 | }
|
|---|
| 1139 |
|
|---|
| 1140 | /* we're replacing the settable bits with those passed in by the user,
|
|---|
| 1141 | * so first zero them out of the master copy, then logical-OR in the
|
|---|
| 1142 | * allowed subset that was requested */
|
|---|
| 1143 |
|
|---|
| 1144 | png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */
|
|---|
| 1145 | png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */
|
|---|
| 1146 | }
|
|---|
| 1147 | #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 1148 |
|
|---|
| 1149 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
|---|
| 1150 | /* this function was added to libpng 1.2.0 */
|
|---|
| 1151 | void PNGAPI
|
|---|
| 1152 | png_set_mmx_thresholds (png_structp png_ptr,
|
|---|
| 1153 | png_byte mmx_bitdepth_threshold,
|
|---|
| 1154 | png_uint_32 mmx_rowbytes_threshold)
|
|---|
| 1155 | {
|
|---|
| 1156 | png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
|
|---|
| 1157 | png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
|
|---|
| 1158 | }
|
|---|
| 1159 | #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 1160 | #endif /* ?PNG_1_0_X */
|
|---|
