[e16e8f2] | 1 | |
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| 2 | /* pngget.c - retrieval of values from info struct |
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| 3 | * |
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| 4 | * Last changed in libpng 1.2.43 [February 25, 2010] |
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| 5 | * Copyright (c) 1998-2010 Glenn Randers-Pehrson |
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| 6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
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| 7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
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| 8 | * |
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| 9 | * This code is released under the libpng license. |
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| 10 | * For conditions of distribution and use, see the disclaimer |
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| 11 | * and license in png.h |
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| 12 | * |
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| 13 | */ |
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| 14 | |
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| 15 | #define PNG_INTERNAL |
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| 16 | #define PNG_NO_PEDANTIC_WARNINGS |
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| 17 | #include "png.h" |
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| 18 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
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| 19 | |
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| 20 | png_uint_32 PNGAPI |
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| 21 | png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag) |
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| 22 | { |
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| 23 | if (png_ptr != NULL && info_ptr != NULL) |
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| 24 | return(info_ptr->valid & flag); |
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| 25 | |
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| 26 | else |
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| 27 | return(0); |
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| 28 | } |
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| 29 | |
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| 30 | png_uint_32 PNGAPI |
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| 31 | png_get_rowbytes(png_structp png_ptr, png_infop info_ptr) |
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| 32 | { |
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| 33 | if (png_ptr != NULL && info_ptr != NULL) |
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| 34 | return(info_ptr->rowbytes); |
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| 35 | |
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| 36 | else |
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| 37 | return(0); |
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| 38 | } |
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| 39 | |
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| 40 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
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| 41 | png_bytepp PNGAPI |
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| 42 | png_get_rows(png_structp png_ptr, png_infop info_ptr) |
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| 43 | { |
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| 44 | if (png_ptr != NULL && info_ptr != NULL) |
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| 45 | return(info_ptr->row_pointers); |
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| 46 | |
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| 47 | else |
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| 48 | return(0); |
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| 49 | } |
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| 50 | #endif |
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| 51 | |
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| 52 | #ifdef PNG_EASY_ACCESS_SUPPORTED |
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| 53 | /* Easy access to info, added in libpng-0.99 */ |
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| 54 | png_uint_32 PNGAPI |
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| 55 | png_get_image_width(png_structp png_ptr, png_infop info_ptr) |
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| 56 | { |
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| 57 | if (png_ptr != NULL && info_ptr != NULL) |
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| 58 | return info_ptr->width; |
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| 59 | |
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| 60 | return (0); |
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| 61 | } |
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| 62 | |
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| 63 | png_uint_32 PNGAPI |
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| 64 | png_get_image_height(png_structp png_ptr, png_infop info_ptr) |
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| 65 | { |
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| 66 | if (png_ptr != NULL && info_ptr != NULL) |
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| 67 | return info_ptr->height; |
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| 68 | |
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| 69 | return (0); |
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| 70 | } |
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| 71 | |
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| 72 | png_byte PNGAPI |
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| 73 | png_get_bit_depth(png_structp png_ptr, png_infop info_ptr) |
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| 74 | { |
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| 75 | if (png_ptr != NULL && info_ptr != NULL) |
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| 76 | return info_ptr->bit_depth; |
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| 77 | |
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| 78 | return (0); |
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| 79 | } |
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| 80 | |
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| 81 | png_byte PNGAPI |
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| 82 | png_get_color_type(png_structp png_ptr, png_infop info_ptr) |
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| 83 | { |
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| 84 | if (png_ptr != NULL && info_ptr != NULL) |
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| 85 | return info_ptr->color_type; |
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| 86 | |
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| 87 | return (0); |
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| 88 | } |
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| 89 | |
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| 90 | png_byte PNGAPI |
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| 91 | png_get_filter_type(png_structp png_ptr, png_infop info_ptr) |
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| 92 | { |
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| 93 | if (png_ptr != NULL && info_ptr != NULL) |
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| 94 | return info_ptr->filter_type; |
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| 95 | |
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| 96 | return (0); |
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| 97 | } |
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| 98 | |
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| 99 | png_byte PNGAPI |
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| 100 | png_get_interlace_type(png_structp png_ptr, png_infop info_ptr) |
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| 101 | { |
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| 102 | if (png_ptr != NULL && info_ptr != NULL) |
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| 103 | return info_ptr->interlace_type; |
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| 104 | |
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| 105 | return (0); |
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| 106 | } |
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| 107 | |
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| 108 | png_byte PNGAPI |
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| 109 | png_get_compression_type(png_structp png_ptr, png_infop info_ptr) |
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| 110 | { |
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| 111 | if (png_ptr != NULL && info_ptr != NULL) |
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| 112 | return info_ptr->compression_type; |
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| 113 | |
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| 114 | return (0); |
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| 115 | } |
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| 116 | |
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| 117 | png_uint_32 PNGAPI |
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| 118 | png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
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| 119 | { |
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| 120 | if (png_ptr != NULL && info_ptr != NULL) |
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| 121 | #ifdef PNG_pHYs_SUPPORTED |
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| 122 | if (info_ptr->valid & PNG_INFO_pHYs) |
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| 123 | { |
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| 124 | png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter"); |
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| 125 | |
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| 126 | if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER) |
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| 127 | return (0); |
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| 128 | |
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| 129 | else |
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| 130 | return (info_ptr->x_pixels_per_unit); |
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| 131 | } |
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| 132 | #else |
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| 133 | return (0); |
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| 134 | #endif |
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| 135 | return (0); |
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| 136 | } |
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| 137 | |
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| 138 | png_uint_32 PNGAPI |
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| 139 | png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
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| 140 | { |
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| 141 | if (png_ptr != NULL && info_ptr != NULL) |
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| 142 | #ifdef PNG_pHYs_SUPPORTED |
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| 143 | if (info_ptr->valid & PNG_INFO_pHYs) |
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| 144 | { |
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| 145 | png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter"); |
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| 146 | |
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| 147 | if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER) |
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| 148 | return (0); |
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| 149 | |
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| 150 | else |
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| 151 | return (info_ptr->y_pixels_per_unit); |
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| 152 | } |
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| 153 | #else |
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| 154 | return (0); |
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| 155 | #endif |
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| 156 | return (0); |
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| 157 | } |
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| 158 | |
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| 159 | png_uint_32 PNGAPI |
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| 160 | png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
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| 161 | { |
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| 162 | if (png_ptr != NULL && info_ptr != NULL) |
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| 163 | #ifdef PNG_pHYs_SUPPORTED |
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| 164 | if (info_ptr->valid & PNG_INFO_pHYs) |
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| 165 | { |
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| 166 | png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter"); |
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| 167 | |
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| 168 | if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER || |
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| 169 | info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit) |
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| 170 | return (0); |
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| 171 | |
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| 172 | else |
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| 173 | return (info_ptr->x_pixels_per_unit); |
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| 174 | } |
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| 175 | #else |
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| 176 | return (0); |
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| 177 | #endif |
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| 178 | return (0); |
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| 179 | } |
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| 180 | |
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| 181 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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| 182 | float PNGAPI |
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| 183 | png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr) |
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| 184 | { |
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| 185 | if (png_ptr != NULL && info_ptr != NULL) |
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| 186 | #ifdef PNG_pHYs_SUPPORTED |
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| 187 | |
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| 188 | if (info_ptr->valid & PNG_INFO_pHYs) |
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| 189 | { |
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| 190 | png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio"); |
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| 191 | |
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| 192 | if (info_ptr->x_pixels_per_unit == 0) |
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| 193 | return ((float)0.0); |
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| 194 | |
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| 195 | else |
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| 196 | return ((float)((float)info_ptr->y_pixels_per_unit |
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| 197 | /(float)info_ptr->x_pixels_per_unit)); |
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| 198 | } |
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| 199 | #else |
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| 200 | return (0.0); |
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| 201 | #endif |
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| 202 | return ((float)0.0); |
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| 203 | } |
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| 204 | #endif |
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| 205 | |
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| 206 | png_int_32 PNGAPI |
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| 207 | png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr) |
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| 208 | { |
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| 209 | if (png_ptr != NULL && info_ptr != NULL) |
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| 210 | #ifdef PNG_oFFs_SUPPORTED |
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| 211 | |
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| 212 | if (info_ptr->valid & PNG_INFO_oFFs) |
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| 213 | { |
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| 214 | png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns"); |
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| 215 | |
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| 216 | if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) |
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| 217 | return (0); |
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| 218 | |
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| 219 | else |
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| 220 | return (info_ptr->x_offset); |
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| 221 | } |
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| 222 | #else |
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| 223 | return (0); |
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| 224 | #endif |
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| 225 | return (0); |
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| 226 | } |
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| 227 | |
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| 228 | png_int_32 PNGAPI |
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| 229 | png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr) |
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| 230 | { |
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| 231 | if (png_ptr != NULL && info_ptr != NULL) |
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| 232 | |
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| 233 | #ifdef PNG_oFFs_SUPPORTED |
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| 234 | if (info_ptr->valid & PNG_INFO_oFFs) |
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| 235 | { |
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| 236 | png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns"); |
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| 237 | |
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| 238 | if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) |
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| 239 | return (0); |
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| 240 | |
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| 241 | else |
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| 242 | return (info_ptr->y_offset); |
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| 243 | } |
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| 244 | #else |
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| 245 | return (0); |
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| 246 | #endif |
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| 247 | return (0); |
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| 248 | } |
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| 249 | |
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| 250 | png_int_32 PNGAPI |
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| 251 | png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr) |
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| 252 | { |
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| 253 | if (png_ptr != NULL && info_ptr != NULL) |
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| 254 | |
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| 255 | #ifdef PNG_oFFs_SUPPORTED |
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| 256 | if (info_ptr->valid & PNG_INFO_oFFs) |
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| 257 | { |
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| 258 | png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns"); |
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| 259 | |
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| 260 | if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) |
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| 261 | return (0); |
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| 262 | |
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| 263 | else |
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| 264 | return (info_ptr->x_offset); |
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| 265 | } |
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| 266 | #else |
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| 267 | return (0); |
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| 268 | #endif |
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| 269 | return (0); |
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| 270 | } |
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| 271 | |
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| 272 | png_int_32 PNGAPI |
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| 273 | png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr) |
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| 274 | { |
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| 275 | if (png_ptr != NULL && info_ptr != NULL) |
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| 276 | |
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| 277 | #ifdef PNG_oFFs_SUPPORTED |
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| 278 | if (info_ptr->valid & PNG_INFO_oFFs) |
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| 279 | { |
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| 280 | png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns"); |
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| 281 | |
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| 282 | if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) |
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| 283 | return (0); |
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| 284 | |
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| 285 | else |
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| 286 | return (info_ptr->y_offset); |
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| 287 | } |
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| 288 | #else |
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| 289 | return (0); |
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| 290 | #endif |
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| 291 | return (0); |
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| 292 | } |
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| 293 | |
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| 294 | #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) |
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| 295 | png_uint_32 PNGAPI |
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| 296 | png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
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| 297 | { |
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| 298 | return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr) |
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| 299 | *.0254 +.5)); |
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| 300 | } |
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| 301 | |
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| 302 | png_uint_32 PNGAPI |
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| 303 | png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
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| 304 | { |
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| 305 | return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr) |
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| 306 | *.0254 +.5)); |
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| 307 | } |
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| 308 | |
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| 309 | png_uint_32 PNGAPI |
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| 310 | png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
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| 311 | { |
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| 312 | return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr) |
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| 313 | *.0254 +.5)); |
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| 314 | } |
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| 315 | |
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| 316 | float PNGAPI |
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| 317 | png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr) |
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| 318 | { |
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| 319 | return ((float)png_get_x_offset_microns(png_ptr, info_ptr) |
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| 320 | *.00003937); |
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| 321 | } |
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| 322 | |
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| 323 | float PNGAPI |
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| 324 | png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr) |
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| 325 | { |
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| 326 | return ((float)png_get_y_offset_microns(png_ptr, info_ptr) |
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| 327 | *.00003937); |
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| 328 | } |
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| 329 | |
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| 330 | #ifdef PNG_pHYs_SUPPORTED |
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| 331 | png_uint_32 PNGAPI |
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| 332 | png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, |
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| 333 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) |
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| 334 | { |
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| 335 | png_uint_32 retval = 0; |
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| 336 | |
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| 337 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) |
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| 338 | { |
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| 339 | png_debug1(1, "in %s retrieval function", "pHYs"); |
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| 340 | |
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| 341 | if (res_x != NULL) |
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| 342 | { |
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| 343 | *res_x = info_ptr->x_pixels_per_unit; |
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| 344 | retval |= PNG_INFO_pHYs; |
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| 345 | } |
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| 346 | if (res_y != NULL) |
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| 347 | { |
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| 348 | *res_y = info_ptr->y_pixels_per_unit; |
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| 349 | retval |= PNG_INFO_pHYs; |
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| 350 | } |
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| 351 | if (unit_type != NULL) |
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| 352 | { |
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| 353 | *unit_type = (int)info_ptr->phys_unit_type; |
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| 354 | retval |= PNG_INFO_pHYs; |
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| 355 | if (*unit_type == 1) |
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| 356 | { |
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| 357 | if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50); |
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| 358 | if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50); |
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| 359 | } |
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| 360 | } |
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| 361 | } |
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| 362 | return (retval); |
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| 363 | } |
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| 364 | #endif /* PNG_pHYs_SUPPORTED */ |
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| 365 | #endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ |
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| 366 | |
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| 367 | /* png_get_channels really belongs in here, too, but it's been around longer */ |
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| 368 | |
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| 369 | #endif /* PNG_EASY_ACCESS_SUPPORTED */ |
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| 370 | |
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| 371 | png_byte PNGAPI |
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| 372 | png_get_channels(png_structp png_ptr, png_infop info_ptr) |
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| 373 | { |
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| 374 | if (png_ptr != NULL && info_ptr != NULL) |
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| 375 | return(info_ptr->channels); |
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| 376 | else |
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| 377 | return (0); |
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| 378 | } |
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| 379 | |
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| 380 | png_bytep PNGAPI |
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| 381 | png_get_signature(png_structp png_ptr, png_infop info_ptr) |
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| 382 | { |
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| 383 | if (png_ptr != NULL && info_ptr != NULL) |
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| 384 | return(info_ptr->signature); |
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| 385 | else |
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| 386 | return (NULL); |
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| 387 | } |
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| 388 | |
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| 389 | #ifdef PNG_bKGD_SUPPORTED |
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| 390 | png_uint_32 PNGAPI |
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| 391 | png_get_bKGD(png_structp png_ptr, png_infop info_ptr, |
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| 392 | png_color_16p *background) |
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| 393 | { |
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| 394 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) |
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| 395 | && background != NULL) |
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| 396 | { |
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| 397 | png_debug1(1, "in %s retrieval function", "bKGD"); |
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| 398 | |
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| 399 | *background = &(info_ptr->background); |
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| 400 | return (PNG_INFO_bKGD); |
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| 401 | } |
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| 402 | return (0); |
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| 403 | } |
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| 404 | #endif |
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| 405 | |
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| 406 | #ifdef PNG_cHRM_SUPPORTED |
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| 407 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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| 408 | png_uint_32 PNGAPI |
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| 409 | png_get_cHRM(png_structp png_ptr, png_infop info_ptr, |
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| 410 | double *white_x, double *white_y, double *red_x, double *red_y, |
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| 411 | double *green_x, double *green_y, double *blue_x, double *blue_y) |
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| 412 | { |
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| 413 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) |
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| 414 | { |
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| 415 | png_debug1(1, "in %s retrieval function", "cHRM"); |
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| 416 | |
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| 417 | if (white_x != NULL) |
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| 418 | *white_x = (double)info_ptr->x_white; |
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| 419 | if (white_y != NULL) |
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| 420 | *white_y = (double)info_ptr->y_white; |
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| 421 | if (red_x != NULL) |
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| 422 | *red_x = (double)info_ptr->x_red; |
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| 423 | if (red_y != NULL) |
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| 424 | *red_y = (double)info_ptr->y_red; |
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| 425 | if (green_x != NULL) |
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| 426 | *green_x = (double)info_ptr->x_green; |
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| 427 | if (green_y != NULL) |
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| 428 | *green_y = (double)info_ptr->y_green; |
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| 429 | if (blue_x != NULL) |
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| 430 | *blue_x = (double)info_ptr->x_blue; |
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| 431 | if (blue_y != NULL) |
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| 432 | *blue_y = (double)info_ptr->y_blue; |
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| 433 | return (PNG_INFO_cHRM); |
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| 434 | } |
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| 435 | return (0); |
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| 436 | } |
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| 437 | #endif |
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| 438 | #ifdef PNG_FIXED_POINT_SUPPORTED |
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| 439 | png_uint_32 PNGAPI |
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| 440 | png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, |
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| 441 | png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, |
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| 442 | png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, |
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| 443 | png_fixed_point *blue_x, png_fixed_point *blue_y) |
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| 444 | { |
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| 445 | png_debug1(1, "in %s retrieval function", "cHRM"); |
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| 446 | |
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| 447 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) |
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| 448 | { |
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| 449 | if (white_x != NULL) |
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| 450 | *white_x = info_ptr->int_x_white; |
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| 451 | if (white_y != NULL) |
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| 452 | *white_y = info_ptr->int_y_white; |
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| 453 | if (red_x != NULL) |
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| 454 | *red_x = info_ptr->int_x_red; |
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| 455 | if (red_y != NULL) |
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| 456 | *red_y = info_ptr->int_y_red; |
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| 457 | if (green_x != NULL) |
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| 458 | *green_x = info_ptr->int_x_green; |
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| 459 | if (green_y != NULL) |
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| 460 | *green_y = info_ptr->int_y_green; |
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| 461 | if (blue_x != NULL) |
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| 462 | *blue_x = info_ptr->int_x_blue; |
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| 463 | if (blue_y != NULL) |
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| 464 | *blue_y = info_ptr->int_y_blue; |
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| 465 | return (PNG_INFO_cHRM); |
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| 466 | } |
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| 467 | return (0); |
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| 468 | } |
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| 469 | #endif |
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| 470 | #endif |
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| 471 | |
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| 472 | #ifdef PNG_gAMA_SUPPORTED |
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| 473 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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| 474 | png_uint_32 PNGAPI |
---|
| 475 | png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma) |
---|
| 476 | { |
---|
| 477 | png_debug1(1, "in %s retrieval function", "gAMA"); |
---|
| 478 | |
---|
| 479 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) |
---|
| 480 | && file_gamma != NULL) |
---|
| 481 | { |
---|
| 482 | *file_gamma = (double)info_ptr->gamma; |
---|
| 483 | return (PNG_INFO_gAMA); |
---|
| 484 | } |
---|
| 485 | return (0); |
---|
| 486 | } |
---|
| 487 | #endif |
---|
| 488 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
| 489 | png_uint_32 PNGAPI |
---|
| 490 | png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, |
---|
| 491 | png_fixed_point *int_file_gamma) |
---|
| 492 | { |
---|
| 493 | png_debug1(1, "in %s retrieval function", "gAMA"); |
---|
| 494 | |
---|
| 495 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) |
---|
| 496 | && int_file_gamma != NULL) |
---|
| 497 | { |
---|
| 498 | *int_file_gamma = info_ptr->int_gamma; |
---|
| 499 | return (PNG_INFO_gAMA); |
---|
| 500 | } |
---|
| 501 | return (0); |
---|
| 502 | } |
---|
| 503 | #endif |
---|
| 504 | #endif |
---|
| 505 | |
---|
| 506 | #ifdef PNG_sRGB_SUPPORTED |
---|
| 507 | png_uint_32 PNGAPI |
---|
| 508 | png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent) |
---|
| 509 | { |
---|
| 510 | png_debug1(1, "in %s retrieval function", "sRGB"); |
---|
| 511 | |
---|
| 512 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) |
---|
| 513 | && file_srgb_intent != NULL) |
---|
| 514 | { |
---|
| 515 | *file_srgb_intent = (int)info_ptr->srgb_intent; |
---|
| 516 | return (PNG_INFO_sRGB); |
---|
| 517 | } |
---|
| 518 | return (0); |
---|
| 519 | } |
---|
| 520 | #endif |
---|
| 521 | |
---|
| 522 | #ifdef PNG_iCCP_SUPPORTED |
---|
| 523 | png_uint_32 PNGAPI |
---|
| 524 | png_get_iCCP(png_structp png_ptr, png_infop info_ptr, |
---|
| 525 | png_charpp name, int *compression_type, |
---|
| 526 | png_charpp profile, png_uint_32 *proflen) |
---|
| 527 | { |
---|
| 528 | png_debug1(1, "in %s retrieval function", "iCCP"); |
---|
| 529 | |
---|
| 530 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP) |
---|
| 531 | && name != NULL && profile != NULL && proflen != NULL) |
---|
| 532 | { |
---|
| 533 | *name = info_ptr->iccp_name; |
---|
| 534 | *profile = info_ptr->iccp_profile; |
---|
| 535 | /* Compression_type is a dummy so the API won't have to change |
---|
| 536 | * if we introduce multiple compression types later. |
---|
| 537 | */ |
---|
| 538 | *proflen = (int)info_ptr->iccp_proflen; |
---|
| 539 | *compression_type = (int)info_ptr->iccp_compression; |
---|
| 540 | return (PNG_INFO_iCCP); |
---|
| 541 | } |
---|
| 542 | return (0); |
---|
| 543 | } |
---|
| 544 | #endif |
---|
| 545 | |
---|
| 546 | #ifdef PNG_sPLT_SUPPORTED |
---|
| 547 | png_uint_32 PNGAPI |
---|
| 548 | png_get_sPLT(png_structp png_ptr, png_infop info_ptr, |
---|
| 549 | png_sPLT_tpp spalettes) |
---|
| 550 | { |
---|
| 551 | if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) |
---|
| 552 | { |
---|
| 553 | *spalettes = info_ptr->splt_palettes; |
---|
| 554 | return ((png_uint_32)info_ptr->splt_palettes_num); |
---|
| 555 | } |
---|
| 556 | return (0); |
---|
| 557 | } |
---|
| 558 | #endif |
---|
| 559 | |
---|
| 560 | #ifdef PNG_hIST_SUPPORTED |
---|
| 561 | png_uint_32 PNGAPI |
---|
| 562 | png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist) |
---|
| 563 | { |
---|
| 564 | png_debug1(1, "in %s retrieval function", "hIST"); |
---|
| 565 | |
---|
| 566 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) |
---|
| 567 | && hist != NULL) |
---|
| 568 | { |
---|
| 569 | *hist = info_ptr->hist; |
---|
| 570 | return (PNG_INFO_hIST); |
---|
| 571 | } |
---|
| 572 | return (0); |
---|
| 573 | } |
---|
| 574 | #endif |
---|
| 575 | |
---|
| 576 | png_uint_32 PNGAPI |
---|
| 577 | png_get_IHDR(png_structp png_ptr, png_infop info_ptr, |
---|
| 578 | png_uint_32 *width, png_uint_32 *height, int *bit_depth, |
---|
| 579 | int *color_type, int *interlace_type, int *compression_type, |
---|
| 580 | int *filter_type) |
---|
| 581 | |
---|
| 582 | { |
---|
| 583 | png_debug1(1, "in %s retrieval function", "IHDR"); |
---|
| 584 | |
---|
| 585 | if (png_ptr == NULL || info_ptr == NULL || width == NULL || |
---|
| 586 | height == NULL || bit_depth == NULL || color_type == NULL) |
---|
| 587 | return (0); |
---|
| 588 | |
---|
| 589 | *width = info_ptr->width; |
---|
| 590 | *height = info_ptr->height; |
---|
| 591 | *bit_depth = info_ptr->bit_depth; |
---|
| 592 | *color_type = info_ptr->color_type; |
---|
| 593 | |
---|
| 594 | if (compression_type != NULL) |
---|
| 595 | *compression_type = info_ptr->compression_type; |
---|
| 596 | |
---|
| 597 | if (filter_type != NULL) |
---|
| 598 | *filter_type = info_ptr->filter_type; |
---|
| 599 | |
---|
| 600 | if (interlace_type != NULL) |
---|
| 601 | *interlace_type = info_ptr->interlace_type; |
---|
| 602 | |
---|
| 603 | /* This is redundant if we can be sure that the info_ptr values were all |
---|
| 604 | * assigned in png_set_IHDR(). We do the check anyhow in case an |
---|
| 605 | * application has ignored our advice not to mess with the members |
---|
| 606 | * of info_ptr directly. |
---|
| 607 | */ |
---|
| 608 | png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, |
---|
| 609 | info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, |
---|
| 610 | info_ptr->compression_type, info_ptr->filter_type); |
---|
| 611 | |
---|
| 612 | return (1); |
---|
| 613 | } |
---|
| 614 | |
---|
| 615 | #ifdef PNG_oFFs_SUPPORTED |
---|
| 616 | png_uint_32 PNGAPI |
---|
| 617 | png_get_oFFs(png_structp png_ptr, png_infop info_ptr, |
---|
| 618 | png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) |
---|
| 619 | { |
---|
| 620 | png_debug1(1, "in %s retrieval function", "oFFs"); |
---|
| 621 | |
---|
| 622 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) |
---|
| 623 | && offset_x != NULL && offset_y != NULL && unit_type != NULL) |
---|
| 624 | { |
---|
| 625 | *offset_x = info_ptr->x_offset; |
---|
| 626 | *offset_y = info_ptr->y_offset; |
---|
| 627 | *unit_type = (int)info_ptr->offset_unit_type; |
---|
| 628 | return (PNG_INFO_oFFs); |
---|
| 629 | } |
---|
| 630 | return (0); |
---|
| 631 | } |
---|
| 632 | #endif |
---|
| 633 | |
---|
| 634 | #ifdef PNG_pCAL_SUPPORTED |
---|
| 635 | png_uint_32 PNGAPI |
---|
| 636 | png_get_pCAL(png_structp png_ptr, png_infop info_ptr, |
---|
| 637 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, |
---|
| 638 | png_charp *units, png_charpp *params) |
---|
| 639 | { |
---|
| 640 | png_debug1(1, "in %s retrieval function", "pCAL"); |
---|
| 641 | |
---|
| 642 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL) |
---|
| 643 | && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && |
---|
| 644 | nparams != NULL && units != NULL && params != NULL) |
---|
| 645 | { |
---|
| 646 | *purpose = info_ptr->pcal_purpose; |
---|
| 647 | *X0 = info_ptr->pcal_X0; |
---|
| 648 | *X1 = info_ptr->pcal_X1; |
---|
| 649 | *type = (int)info_ptr->pcal_type; |
---|
| 650 | *nparams = (int)info_ptr->pcal_nparams; |
---|
| 651 | *units = info_ptr->pcal_units; |
---|
| 652 | *params = info_ptr->pcal_params; |
---|
| 653 | return (PNG_INFO_pCAL); |
---|
| 654 | } |
---|
| 655 | return (0); |
---|
| 656 | } |
---|
| 657 | #endif |
---|
| 658 | |
---|
| 659 | #ifdef PNG_sCAL_SUPPORTED |
---|
| 660 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
---|
| 661 | png_uint_32 PNGAPI |
---|
| 662 | png_get_sCAL(png_structp png_ptr, png_infop info_ptr, |
---|
| 663 | int *unit, double *width, double *height) |
---|
| 664 | { |
---|
| 665 | if (png_ptr != NULL && info_ptr != NULL && |
---|
| 666 | (info_ptr->valid & PNG_INFO_sCAL)) |
---|
| 667 | { |
---|
| 668 | *unit = info_ptr->scal_unit; |
---|
| 669 | *width = info_ptr->scal_pixel_width; |
---|
| 670 | *height = info_ptr->scal_pixel_height; |
---|
| 671 | return (PNG_INFO_sCAL); |
---|
| 672 | } |
---|
| 673 | return(0); |
---|
| 674 | } |
---|
| 675 | #else |
---|
| 676 | #ifdef PNG_FIXED_POINT_SUPPORTED |
---|
| 677 | png_uint_32 PNGAPI |
---|
| 678 | png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr, |
---|
| 679 | int *unit, png_charpp width, png_charpp height) |
---|
| 680 | { |
---|
| 681 | if (png_ptr != NULL && info_ptr != NULL && |
---|
| 682 | (info_ptr->valid & PNG_INFO_sCAL)) |
---|
| 683 | { |
---|
| 684 | *unit = info_ptr->scal_unit; |
---|
| 685 | *width = info_ptr->scal_s_width; |
---|
| 686 | *height = info_ptr->scal_s_height; |
---|
| 687 | return (PNG_INFO_sCAL); |
---|
| 688 | } |
---|
| 689 | return(0); |
---|
| 690 | } |
---|
| 691 | #endif |
---|
| 692 | #endif |
---|
| 693 | #endif |
---|
| 694 | |
---|
| 695 | #ifdef PNG_pHYs_SUPPORTED |
---|
| 696 | png_uint_32 PNGAPI |
---|
| 697 | png_get_pHYs(png_structp png_ptr, png_infop info_ptr, |
---|
| 698 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) |
---|
| 699 | { |
---|
| 700 | png_uint_32 retval = 0; |
---|
| 701 | |
---|
| 702 | png_debug1(1, "in %s retrieval function", "pHYs"); |
---|
| 703 | |
---|
| 704 | if (png_ptr != NULL && info_ptr != NULL && |
---|
| 705 | (info_ptr->valid & PNG_INFO_pHYs)) |
---|
| 706 | { |
---|
| 707 | if (res_x != NULL) |
---|
| 708 | { |
---|
| 709 | *res_x = info_ptr->x_pixels_per_unit; |
---|
| 710 | retval |= PNG_INFO_pHYs; |
---|
| 711 | } |
---|
| 712 | |
---|
| 713 | if (res_y != NULL) |
---|
| 714 | { |
---|
| 715 | *res_y = info_ptr->y_pixels_per_unit; |
---|
| 716 | retval |= PNG_INFO_pHYs; |
---|
| 717 | } |
---|
| 718 | |
---|
| 719 | if (unit_type != NULL) |
---|
| 720 | { |
---|
| 721 | *unit_type = (int)info_ptr->phys_unit_type; |
---|
| 722 | retval |= PNG_INFO_pHYs; |
---|
| 723 | } |
---|
| 724 | } |
---|
| 725 | return (retval); |
---|
| 726 | } |
---|
| 727 | #endif |
---|
| 728 | |
---|
| 729 | png_uint_32 PNGAPI |
---|
| 730 | png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette, |
---|
| 731 | int *num_palette) |
---|
| 732 | { |
---|
| 733 | png_debug1(1, "in %s retrieval function", "PLTE"); |
---|
| 734 | |
---|
| 735 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE) |
---|
| 736 | && palette != NULL) |
---|
| 737 | { |
---|
| 738 | *palette = info_ptr->palette; |
---|
| 739 | *num_palette = info_ptr->num_palette; |
---|
| 740 | png_debug1(3, "num_palette = %d", *num_palette); |
---|
| 741 | return (PNG_INFO_PLTE); |
---|
| 742 | } |
---|
| 743 | return (0); |
---|
| 744 | } |
---|
| 745 | |
---|
| 746 | #ifdef PNG_sBIT_SUPPORTED |
---|
| 747 | png_uint_32 PNGAPI |
---|
| 748 | png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit) |
---|
| 749 | { |
---|
| 750 | png_debug1(1, "in %s retrieval function", "sBIT"); |
---|
| 751 | |
---|
| 752 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT) |
---|
| 753 | && sig_bit != NULL) |
---|
| 754 | { |
---|
| 755 | *sig_bit = &(info_ptr->sig_bit); |
---|
| 756 | return (PNG_INFO_sBIT); |
---|
| 757 | } |
---|
| 758 | return (0); |
---|
| 759 | } |
---|
| 760 | #endif |
---|
| 761 | |
---|
| 762 | #ifdef PNG_TEXT_SUPPORTED |
---|
| 763 | png_uint_32 PNGAPI |
---|
| 764 | png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, |
---|
| 765 | int *num_text) |
---|
| 766 | { |
---|
| 767 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) |
---|
| 768 | { |
---|
| 769 | png_debug1(1, "in %s retrieval function", |
---|
| 770 | (png_ptr->chunk_name[0] == '\0' ? "text" |
---|
| 771 | : (png_const_charp)png_ptr->chunk_name)); |
---|
| 772 | |
---|
| 773 | if (text_ptr != NULL) |
---|
| 774 | *text_ptr = info_ptr->text; |
---|
| 775 | |
---|
| 776 | if (num_text != NULL) |
---|
| 777 | *num_text = info_ptr->num_text; |
---|
| 778 | |
---|
| 779 | return ((png_uint_32)info_ptr->num_text); |
---|
| 780 | } |
---|
| 781 | if (num_text != NULL) |
---|
| 782 | *num_text = 0; |
---|
| 783 | return(0); |
---|
| 784 | } |
---|
| 785 | #endif |
---|
| 786 | |
---|
| 787 | #ifdef PNG_tIME_SUPPORTED |
---|
| 788 | png_uint_32 PNGAPI |
---|
| 789 | png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time) |
---|
| 790 | { |
---|
| 791 | png_debug1(1, "in %s retrieval function", "tIME"); |
---|
| 792 | |
---|
| 793 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME) |
---|
| 794 | && mod_time != NULL) |
---|
| 795 | { |
---|
| 796 | *mod_time = &(info_ptr->mod_time); |
---|
| 797 | return (PNG_INFO_tIME); |
---|
| 798 | } |
---|
| 799 | return (0); |
---|
| 800 | } |
---|
| 801 | #endif |
---|
| 802 | |
---|
| 803 | #ifdef PNG_tRNS_SUPPORTED |
---|
| 804 | png_uint_32 PNGAPI |
---|
| 805 | png_get_tRNS(png_structp png_ptr, png_infop info_ptr, |
---|
| 806 | png_bytep *trans, int *num_trans, png_color_16p *trans_values) |
---|
| 807 | { |
---|
| 808 | png_uint_32 retval = 0; |
---|
| 809 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) |
---|
| 810 | { |
---|
| 811 | png_debug1(1, "in %s retrieval function", "tRNS"); |
---|
| 812 | |
---|
| 813 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
---|
| 814 | { |
---|
| 815 | if (trans != NULL) |
---|
| 816 | { |
---|
| 817 | *trans = info_ptr->trans; |
---|
| 818 | retval |= PNG_INFO_tRNS; |
---|
| 819 | } |
---|
| 820 | |
---|
| 821 | if (trans_values != NULL) |
---|
| 822 | *trans_values = &(info_ptr->trans_values); |
---|
| 823 | } |
---|
| 824 | else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ |
---|
| 825 | { |
---|
| 826 | if (trans_values != NULL) |
---|
| 827 | { |
---|
| 828 | *trans_values = &(info_ptr->trans_values); |
---|
| 829 | retval |= PNG_INFO_tRNS; |
---|
| 830 | } |
---|
| 831 | |
---|
| 832 | if (trans != NULL) |
---|
| 833 | *trans = NULL; |
---|
| 834 | } |
---|
| 835 | if (num_trans != NULL) |
---|
| 836 | { |
---|
| 837 | *num_trans = info_ptr->num_trans; |
---|
| 838 | retval |= PNG_INFO_tRNS; |
---|
| 839 | } |
---|
| 840 | } |
---|
| 841 | return (retval); |
---|
| 842 | } |
---|
| 843 | #endif |
---|
| 844 | |
---|
| 845 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
---|
| 846 | png_uint_32 PNGAPI |
---|
| 847 | png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, |
---|
| 848 | png_unknown_chunkpp unknowns) |
---|
| 849 | { |
---|
| 850 | if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) |
---|
| 851 | { |
---|
| 852 | *unknowns = info_ptr->unknown_chunks; |
---|
| 853 | return ((png_uint_32)info_ptr->unknown_chunks_num); |
---|
| 854 | } |
---|
| 855 | return (0); |
---|
| 856 | } |
---|
| 857 | #endif |
---|
| 858 | |
---|
| 859 | #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED |
---|
| 860 | png_byte PNGAPI |
---|
| 861 | png_get_rgb_to_gray_status (png_structp png_ptr) |
---|
| 862 | { |
---|
| 863 | return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0); |
---|
| 864 | } |
---|
| 865 | #endif |
---|
| 866 | |
---|
| 867 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
---|
| 868 | png_voidp PNGAPI |
---|
| 869 | png_get_user_chunk_ptr(png_structp png_ptr) |
---|
| 870 | { |
---|
| 871 | return (png_ptr? png_ptr->user_chunk_ptr : NULL); |
---|
| 872 | } |
---|
| 873 | #endif |
---|
| 874 | |
---|
| 875 | png_uint_32 PNGAPI |
---|
| 876 | png_get_compression_buffer_size(png_structp png_ptr) |
---|
| 877 | { |
---|
| 878 | return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L); |
---|
| 879 | } |
---|
| 880 | |
---|
| 881 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
---|
| 882 | #ifndef PNG_1_0_X |
---|
| 883 | /* This function was added to libpng 1.2.0 and should exist by default */ |
---|
| 884 | png_uint_32 PNGAPI |
---|
| 885 | png_get_asm_flags (png_structp png_ptr) |
---|
| 886 | { |
---|
| 887 | /* Obsolete, to be removed from libpng-1.4.0 */ |
---|
| 888 | return (png_ptr? 0L: 0L); |
---|
| 889 | } |
---|
| 890 | |
---|
| 891 | /* This function was added to libpng 1.2.0 and should exist by default */ |
---|
| 892 | png_uint_32 PNGAPI |
---|
| 893 | png_get_asm_flagmask (int flag_select) |
---|
| 894 | { |
---|
| 895 | /* Obsolete, to be removed from libpng-1.4.0 */ |
---|
| 896 | flag_select=flag_select; |
---|
| 897 | return 0L; |
---|
| 898 | } |
---|
| 899 | |
---|
| 900 | /* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */ |
---|
| 901 | /* This function was added to libpng 1.2.0 */ |
---|
| 902 | png_uint_32 PNGAPI |
---|
| 903 | png_get_mmx_flagmask (int flag_select, int *compilerID) |
---|
| 904 | { |
---|
| 905 | /* Obsolete, to be removed from libpng-1.4.0 */ |
---|
| 906 | flag_select=flag_select; |
---|
| 907 | *compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */ |
---|
| 908 | return 0L; |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | /* This function was added to libpng 1.2.0 */ |
---|
| 912 | png_byte PNGAPI |
---|
| 913 | png_get_mmx_bitdepth_threshold (png_structp png_ptr) |
---|
| 914 | { |
---|
| 915 | /* Obsolete, to be removed from libpng-1.4.0 */ |
---|
| 916 | return (png_ptr? 0: 0); |
---|
| 917 | } |
---|
| 918 | |
---|
| 919 | /* This function was added to libpng 1.2.0 */ |
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| 920 | png_uint_32 PNGAPI |
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| 921 | png_get_mmx_rowbytes_threshold (png_structp png_ptr) |
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| 922 | { |
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| 923 | /* Obsolete, to be removed from libpng-1.4.0 */ |
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| 924 | return (png_ptr? 0L: 0L); |
---|
| 925 | } |
---|
| 926 | #endif /* ?PNG_1_0_X */ |
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| 927 | #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ |
---|
| 928 | |
---|
| 929 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
---|
| 930 | /* These functions were added to libpng 1.2.6 but not enabled |
---|
| 931 | * by default. They will be enabled in libpng-1.4.0 */ |
---|
| 932 | png_uint_32 PNGAPI |
---|
| 933 | png_get_user_width_max (png_structp png_ptr) |
---|
| 934 | { |
---|
| 935 | return (png_ptr? png_ptr->user_width_max : 0); |
---|
| 936 | } |
---|
| 937 | png_uint_32 PNGAPI |
---|
| 938 | png_get_user_height_max (png_structp png_ptr) |
---|
| 939 | { |
---|
| 940 | return (png_ptr? png_ptr->user_height_max : 0); |
---|
| 941 | } |
---|
| 942 | #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ |
---|
| 943 | |
---|
| 944 | #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |
---|