[95] | 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 1.2.15 January 5, 2007
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| 5 | * For conditions of distribution and use, see copyright notice in png.h
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| 6 | * Copyright (c) 1998-2007 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 |
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| 11 | #define PNG_INTERNAL
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| 12 | #include "png.h"
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| 13 |
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| 14 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
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| 15 |
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| 16 | png_uint_32 PNGAPI
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| 17 | png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
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| 18 | {
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| 19 | if (png_ptr != NULL && info_ptr != NULL)
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| 20 | return(info_ptr->valid & flag);
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| 21 | else
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| 22 | return(0);
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| 23 | }
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| 24 |
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| 25 | png_uint_32 PNGAPI
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| 26 | png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
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| 27 | {
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| 28 | if (png_ptr != NULL && info_ptr != NULL)
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| 29 | return(info_ptr->rowbytes);
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| 30 | else
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| 31 | return(0);
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| 32 | }
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| 33 |
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| 34 | #if defined(PNG_INFO_IMAGE_SUPPORTED)
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| 35 | png_bytepp PNGAPI
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| 36 | png_get_rows(png_structp png_ptr, png_infop info_ptr)
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| 37 | {
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| 38 | if (png_ptr != NULL && info_ptr != NULL)
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| 39 | return(info_ptr->row_pointers);
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| 40 | else
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| 41 | return(0);
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| 42 | }
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| 43 | #endif
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| 44 |
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| 45 | #ifdef PNG_EASY_ACCESS_SUPPORTED
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| 46 | /* easy access to info, added in libpng-0.99 */
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| 47 | png_uint_32 PNGAPI
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| 48 | png_get_image_width(png_structp png_ptr, png_infop info_ptr)
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| 49 | {
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| 50 | if (png_ptr != NULL && info_ptr != NULL)
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| 51 | {
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| 52 | return info_ptr->width;
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| 53 | }
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| 54 | return (0);
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| 55 | }
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| 56 |
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| 57 | png_uint_32 PNGAPI
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| 58 | png_get_image_height(png_structp png_ptr, png_infop info_ptr)
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| 59 | {
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| 60 | if (png_ptr != NULL && info_ptr != NULL)
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| 61 | {
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| 62 | return info_ptr->height;
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| 63 | }
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| 64 | return (0);
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| 65 | }
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| 66 |
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| 67 | png_byte PNGAPI
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| 68 | png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
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| 69 | {
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| 70 | if (png_ptr != NULL && info_ptr != NULL)
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| 71 | {
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| 72 | return info_ptr->bit_depth;
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| 73 | }
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| 74 | return (0);
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| 75 | }
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| 76 |
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| 77 | png_byte PNGAPI
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| 78 | png_get_color_type(png_structp png_ptr, png_infop info_ptr)
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| 79 | {
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| 80 | if (png_ptr != NULL && info_ptr != NULL)
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| 81 | {
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| 82 | return info_ptr->color_type;
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| 83 | }
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| 84 | return (0);
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| 85 | }
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| 86 |
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| 87 | png_byte PNGAPI
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| 88 | png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
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| 89 | {
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| 90 | if (png_ptr != NULL && info_ptr != NULL)
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| 91 | {
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| 92 | return info_ptr->filter_type;
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| 93 | }
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| 94 | return (0);
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| 95 | }
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| 96 |
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| 97 | png_byte PNGAPI
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| 98 | png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
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| 99 | {
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| 100 | if (png_ptr != NULL && info_ptr != NULL)
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| 101 | {
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| 102 | return info_ptr->interlace_type;
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| 103 | }
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| 104 | return (0);
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| 105 | }
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| 106 |
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| 107 | png_byte PNGAPI
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| 108 | png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
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| 109 | {
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| 110 | if (png_ptr != NULL && info_ptr != NULL)
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| 111 | {
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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 | #if defined(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\n", "png_get_x_pixels_per_meter");
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| 125 | if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
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| 126 | return (0);
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| 127 | else return (info_ptr->x_pixels_per_unit);
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| 128 | }
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| 129 | #else
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| 130 | return (0);
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| 131 | #endif
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| 132 | return (0);
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| 133 | }
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| 134 |
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| 135 | png_uint_32 PNGAPI
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| 136 | png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
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| 137 | {
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| 138 | if (png_ptr != NULL && info_ptr != NULL)
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| 139 | #if defined(PNG_pHYs_SUPPORTED)
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| 140 | if (info_ptr->valid & PNG_INFO_pHYs)
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| 141 | {
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| 142 | png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
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| 143 | if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
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| 144 | return (0);
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| 145 | else return (info_ptr->y_pixels_per_unit);
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| 146 | }
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| 147 | #else
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| 148 | return (0);
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| 149 | #endif
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| 150 | return (0);
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| 151 | }
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| 152 |
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| 153 | png_uint_32 PNGAPI
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| 154 | png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
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| 155 | {
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| 156 | if (png_ptr != NULL && info_ptr != NULL)
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| 157 | #if defined(PNG_pHYs_SUPPORTED)
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| 158 | if (info_ptr->valid & PNG_INFO_pHYs)
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| 159 | {
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| 160 | png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
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| 161 | if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
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| 162 | info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
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| 163 | return (0);
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| 164 | else return (info_ptr->x_pixels_per_unit);
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| 165 | }
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| 166 | #else
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| 167 | return (0);
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| 168 | #endif
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| 169 | return (0);
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| 170 | }
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| 171 |
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| 172 | #ifdef PNG_FLOATING_POINT_SUPPORTED
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| 173 | float PNGAPI
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| 174 | png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
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| 175 | {
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| 176 | if (png_ptr != NULL && info_ptr != NULL)
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| 177 | #if defined(PNG_pHYs_SUPPORTED)
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| 178 | if (info_ptr->valid & PNG_INFO_pHYs)
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| 179 | {
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| 180 | png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
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| 181 | if (info_ptr->x_pixels_per_unit == 0)
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| 182 | return ((float)0.0);
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| 183 | else
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| 184 | return ((float)((float)info_ptr->y_pixels_per_unit
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| 185 | /(float)info_ptr->x_pixels_per_unit));
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| 186 | }
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| 187 | #else
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| 188 | return (0.0);
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| 189 | #endif
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| 190 | return ((float)0.0);
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| 191 | }
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| 192 | #endif
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| 193 |
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| 194 | png_int_32 PNGAPI
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| 195 | png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
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| 196 | {
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| 197 | if (png_ptr != NULL && info_ptr != NULL)
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| 198 | #if defined(PNG_oFFs_SUPPORTED)
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| 199 | if (info_ptr->valid & PNG_INFO_oFFs)
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| 200 | {
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| 201 | png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
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| 202 | if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
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| 203 | return (0);
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| 204 | else return (info_ptr->x_offset);
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| 205 | }
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| 206 | #else
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| 207 | return (0);
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| 208 | #endif
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| 209 | return (0);
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| 210 | }
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| 211 |
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| 212 | png_int_32 PNGAPI
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| 213 | png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
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| 214 | {
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| 215 | if (png_ptr != NULL && info_ptr != NULL)
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| 216 | #if defined(PNG_oFFs_SUPPORTED)
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| 217 | if (info_ptr->valid & PNG_INFO_oFFs)
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| 218 | {
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| 219 | png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
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| 220 | if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
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| 221 | return (0);
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| 222 | else return (info_ptr->y_offset);
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| 223 | }
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| 224 | #else
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| 225 | return (0);
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| 226 | #endif
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| 227 | return (0);
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| 228 | }
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| 229 |
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| 230 | png_int_32 PNGAPI
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| 231 | png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
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| 232 | {
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| 233 | if (png_ptr != NULL && info_ptr != NULL)
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| 234 | #if defined(PNG_oFFs_SUPPORTED)
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| 235 | if (info_ptr->valid & PNG_INFO_oFFs)
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| 236 | {
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| 237 | png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
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| 238 | if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
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| 239 | return (0);
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| 240 | else return (info_ptr->x_offset);
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| 241 | }
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| 242 | #else
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| 243 | return (0);
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| 244 | #endif
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| 245 | return (0);
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| 246 | }
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| 247 |
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| 248 | png_int_32 PNGAPI
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| 249 | png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
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| 250 | {
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| 251 | if (png_ptr != NULL && info_ptr != NULL)
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| 252 | #if defined(PNG_oFFs_SUPPORTED)
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| 253 | if (info_ptr->valid & PNG_INFO_oFFs)
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| 254 | {
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| 255 | png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
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| 256 | if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
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| 257 | return (0);
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| 258 | else return (info_ptr->y_offset);
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| 259 | }
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| 260 | #else
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| 261 | return (0);
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| 262 | #endif
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| 263 | return (0);
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| 264 | }
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| 265 |
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| 266 | #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
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| 267 | png_uint_32 PNGAPI
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| 268 | png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
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| 269 | {
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| 270 | return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
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| 271 | *.0254 +.5));
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| 272 | }
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| 273 |
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| 274 | png_uint_32 PNGAPI
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| 275 | png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
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| 276 | {
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| 277 | return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
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| 278 | *.0254 +.5));
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| 279 | }
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| 280 |
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| 281 | png_uint_32 PNGAPI
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| 282 | png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
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| 283 | {
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| 284 | return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
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| 285 | *.0254 +.5));
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| 286 | }
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| 287 |
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| 288 | float PNGAPI
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| 289 | png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
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| 290 | {
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| 291 | return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
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| 292 | *.00003937);
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| 293 | }
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| 294 |
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| 295 | float PNGAPI
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| 296 | png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
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| 297 | {
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| 298 | return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
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| 299 | *.00003937);
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| 300 | }
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| 301 |
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| 302 | #if defined(PNG_pHYs_SUPPORTED)
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| 303 | png_uint_32 PNGAPI
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| 304 | png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
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| 305 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
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| 306 | {
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| 307 | png_uint_32 retval = 0;
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| 308 |
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| 309 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
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| 310 | {
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| 311 | png_debug1(1, "in %s retrieval function\n", "pHYs");
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| 312 | if (res_x != NULL)
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| 313 | {
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| 314 | *res_x = info_ptr->x_pixels_per_unit;
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| 315 | retval |= PNG_INFO_pHYs;
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| 316 | }
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| 317 | if (res_y != NULL)
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| 318 | {
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| 319 | *res_y = info_ptr->y_pixels_per_unit;
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| 320 | retval |= PNG_INFO_pHYs;
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| 321 | }
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| 322 | if (unit_type != NULL)
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| 323 | {
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| 324 | *unit_type = (int)info_ptr->phys_unit_type;
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| 325 | retval |= PNG_INFO_pHYs;
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| 326 | if(*unit_type == 1)
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| 327 | {
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| 328 | if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
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| 329 | if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
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| 330 | }
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| 331 | }
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| 332 | }
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| 333 | return (retval);
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| 334 | }
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| 335 | #endif /* PNG_pHYs_SUPPORTED */
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| 336 | #endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
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| 337 |
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| 338 | /* png_get_channels really belongs in here, too, but it's been around longer */
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| 339 |
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| 340 | #endif /* PNG_EASY_ACCESS_SUPPORTED */
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| 341 |
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| 342 | png_byte PNGAPI
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| 343 | png_get_channels(png_structp png_ptr, png_infop info_ptr)
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| 344 | {
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| 345 | if (png_ptr != NULL && info_ptr != NULL)
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| 346 | return(info_ptr->channels);
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| 347 | else
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| 348 | return (0);
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| 349 | }
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| 350 |
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| 351 | png_bytep PNGAPI
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| 352 | png_get_signature(png_structp png_ptr, png_infop info_ptr)
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| 353 | {
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| 354 | if (png_ptr != NULL && info_ptr != NULL)
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| 355 | return(info_ptr->signature);
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| 356 | else
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| 357 | return (NULL);
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| 358 | }
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| 359 |
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| 360 | #if defined(PNG_bKGD_SUPPORTED)
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| 361 | png_uint_32 PNGAPI
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| 362 | png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
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| 363 | png_color_16p *background)
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| 364 | {
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| 365 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
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| 366 | && background != NULL)
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| 367 | {
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| 368 | png_debug1(1, "in %s retrieval function\n", "bKGD");
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| 369 | *background = &(info_ptr->background);
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| 370 | return (PNG_INFO_bKGD);
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| 371 | }
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| 372 | return (0);
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| 373 | }
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| 374 | #endif
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| 375 |
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| 376 | #if defined(PNG_cHRM_SUPPORTED)
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| 377 | #ifdef PNG_FLOATING_POINT_SUPPORTED
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| 378 | png_uint_32 PNGAPI
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| 379 | png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
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| 380 | double *white_x, double *white_y, double *red_x, double *red_y,
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| 381 | double *green_x, double *green_y, double *blue_x, double *blue_y)
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| 382 | {
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| 383 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
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| 384 | {
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| 385 | png_debug1(1, "in %s retrieval function\n", "cHRM");
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| 386 | if (white_x != NULL)
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| 387 | *white_x = (double)info_ptr->x_white;
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| 388 | if (white_y != NULL)
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| 389 | *white_y = (double)info_ptr->y_white;
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| 390 | if (red_x != NULL)
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| 391 | *red_x = (double)info_ptr->x_red;
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| 392 | if (red_y != NULL)
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| 393 | *red_y = (double)info_ptr->y_red;
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| 394 | if (green_x != NULL)
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| 395 | *green_x = (double)info_ptr->x_green;
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| 396 | if (green_y != NULL)
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| 397 | *green_y = (double)info_ptr->y_green;
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| 398 | if (blue_x != NULL)
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| 399 | *blue_x = (double)info_ptr->x_blue;
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| 400 | if (blue_y != NULL)
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| 401 | *blue_y = (double)info_ptr->y_blue;
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| 402 | return (PNG_INFO_cHRM);
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| 403 | }
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| 404 | return (0);
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| 405 | }
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| 406 | #endif
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| 407 | #ifdef PNG_FIXED_POINT_SUPPORTED
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| 408 | png_uint_32 PNGAPI
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| 409 | png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
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| 410 | png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
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| 411 | png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
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---|
| 412 | png_fixed_point *blue_x, png_fixed_point *blue_y)
|
---|
| 413 | {
|
---|
| 414 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
|
---|
| 415 | {
|
---|
| 416 | png_debug1(1, "in %s retrieval function\n", "cHRM");
|
---|
| 417 | if (white_x != NULL)
|
---|
| 418 | *white_x = info_ptr->int_x_white;
|
---|
| 419 | if (white_y != NULL)
|
---|
| 420 | *white_y = info_ptr->int_y_white;
|
---|
| 421 | if (red_x != NULL)
|
---|
| 422 | *red_x = info_ptr->int_x_red;
|
---|
| 423 | if (red_y != NULL)
|
---|
| 424 | *red_y = info_ptr->int_y_red;
|
---|
| 425 | if (green_x != NULL)
|
---|
| 426 | *green_x = info_ptr->int_x_green;
|
---|
| 427 | if (green_y != NULL)
|
---|
| 428 | *green_y = info_ptr->int_y_green;
|
---|
| 429 | if (blue_x != NULL)
|
---|
| 430 | *blue_x = info_ptr->int_x_blue;
|
---|
| 431 | if (blue_y != NULL)
|
---|
| 432 | *blue_y = info_ptr->int_y_blue;
|
---|
| 433 | return (PNG_INFO_cHRM);
|
---|
| 434 | }
|
---|
| 435 | return (0);
|
---|
| 436 | }
|
---|
| 437 | #endif
|
---|
| 438 | #endif
|
---|
| 439 |
|
---|
| 440 | #if defined(PNG_gAMA_SUPPORTED)
|
---|
| 441 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
---|
| 442 | png_uint_32 PNGAPI
|
---|
| 443 | png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
|
---|
| 444 | {
|
---|
| 445 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
---|
| 446 | && file_gamma != NULL)
|
---|
| 447 | {
|
---|
| 448 | png_debug1(1, "in %s retrieval function\n", "gAMA");
|
---|
| 449 | *file_gamma = (double)info_ptr->gamma;
|
---|
| 450 | return (PNG_INFO_gAMA);
|
---|
| 451 | }
|
---|
| 452 | return (0);
|
---|
| 453 | }
|
---|
| 454 | #endif
|
---|
| 455 | #ifdef PNG_FIXED_POINT_SUPPORTED
|
---|
| 456 | png_uint_32 PNGAPI
|
---|
| 457 | png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
|
---|
| 458 | png_fixed_point *int_file_gamma)
|
---|
| 459 | {
|
---|
| 460 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
---|
| 461 | && int_file_gamma != NULL)
|
---|
| 462 | {
|
---|
| 463 | png_debug1(1, "in %s retrieval function\n", "gAMA");
|
---|
| 464 | *int_file_gamma = info_ptr->int_gamma;
|
---|
| 465 | return (PNG_INFO_gAMA);
|
---|
| 466 | }
|
---|
| 467 | return (0);
|
---|
| 468 | }
|
---|
| 469 | #endif
|
---|
| 470 | #endif
|
---|
| 471 |
|
---|
| 472 | #if defined(PNG_sRGB_SUPPORTED)
|
---|
| 473 | png_uint_32 PNGAPI
|
---|
| 474 | png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
|
---|
| 475 | {
|
---|
| 476 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
|
---|
| 477 | && file_srgb_intent != NULL)
|
---|
| 478 | {
|
---|
| 479 | png_debug1(1, "in %s retrieval function\n", "sRGB");
|
---|
| 480 | *file_srgb_intent = (int)info_ptr->srgb_intent;
|
---|
| 481 | return (PNG_INFO_sRGB);
|
---|
| 482 | }
|
---|
| 483 | return (0);
|
---|
| 484 | }
|
---|
| 485 | #endif
|
---|
| 486 |
|
---|
| 487 | #if defined(PNG_iCCP_SUPPORTED)
|
---|
| 488 | png_uint_32 PNGAPI
|
---|
| 489 | png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
|
---|
| 490 | png_charpp name, int *compression_type,
|
---|
| 491 | png_charpp profile, png_uint_32 *proflen)
|
---|
| 492 | {
|
---|
| 493 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
|
---|
| 494 | && name != NULL && profile != NULL && proflen != NULL)
|
---|
| 495 | {
|
---|
| 496 | png_debug1(1, "in %s retrieval function\n", "iCCP");
|
---|
| 497 | *name = info_ptr->iccp_name;
|
---|
| 498 | *profile = info_ptr->iccp_profile;
|
---|
| 499 | /* compression_type is a dummy so the API won't have to change
|
---|
| 500 | if we introduce multiple compression types later. */
|
---|
| 501 | *proflen = (int)info_ptr->iccp_proflen;
|
---|
| 502 | *compression_type = (int)info_ptr->iccp_compression;
|
---|
| 503 | return (PNG_INFO_iCCP);
|
---|
| 504 | }
|
---|
| 505 | return (0);
|
---|
| 506 | }
|
---|
| 507 | #endif
|
---|
| 508 |
|
---|
| 509 | #if defined(PNG_sPLT_SUPPORTED)
|
---|
| 510 | png_uint_32 PNGAPI
|
---|
| 511 | png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
|
---|
| 512 | png_sPLT_tpp spalettes)
|
---|
| 513 | {
|
---|
| 514 | if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
|
---|
| 515 | *spalettes = info_ptr->splt_palettes;
|
---|
| 516 | return ((png_uint_32)info_ptr->splt_palettes_num);
|
---|
| 517 | }
|
---|
| 518 | #endif
|
---|
| 519 |
|
---|
| 520 | #if defined(PNG_hIST_SUPPORTED)
|
---|
| 521 | png_uint_32 PNGAPI
|
---|
| 522 | png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
|
---|
| 523 | {
|
---|
| 524 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
|
---|
| 525 | && hist != NULL)
|
---|
| 526 | {
|
---|
| 527 | png_debug1(1, "in %s retrieval function\n", "hIST");
|
---|
| 528 | *hist = info_ptr->hist;
|
---|
| 529 | return (PNG_INFO_hIST);
|
---|
| 530 | }
|
---|
| 531 | return (0);
|
---|
| 532 | }
|
---|
| 533 | #endif
|
---|
| 534 |
|
---|
| 535 | png_uint_32 PNGAPI
|
---|
| 536 | png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
|
---|
| 537 | png_uint_32 *width, png_uint_32 *height, int *bit_depth,
|
---|
| 538 | int *color_type, int *interlace_type, int *compression_type,
|
---|
| 539 | int *filter_type)
|
---|
| 540 |
|
---|
| 541 | {
|
---|
| 542 | if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
|
---|
| 543 | bit_depth != NULL && color_type != NULL)
|
---|
| 544 | {
|
---|
| 545 | png_debug1(1, "in %s retrieval function\n", "IHDR");
|
---|
| 546 | *width = info_ptr->width;
|
---|
| 547 | *height = info_ptr->height;
|
---|
| 548 | *bit_depth = info_ptr->bit_depth;
|
---|
| 549 | if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
|
---|
| 550 | png_error(png_ptr, "Invalid bit depth");
|
---|
| 551 | *color_type = info_ptr->color_type;
|
---|
| 552 | if (info_ptr->color_type > 6)
|
---|
| 553 | png_error(png_ptr, "Invalid color type");
|
---|
| 554 | if (compression_type != NULL)
|
---|
| 555 | *compression_type = info_ptr->compression_type;
|
---|
| 556 | if (filter_type != NULL)
|
---|
| 557 | *filter_type = info_ptr->filter_type;
|
---|
| 558 | if (interlace_type != NULL)
|
---|
| 559 | *interlace_type = info_ptr->interlace_type;
|
---|
| 560 |
|
---|
| 561 | /* check for potential overflow of rowbytes */
|
---|
| 562 | if (*width == 0 || *width > PNG_UINT_31_MAX)
|
---|
| 563 | png_error(png_ptr, "Invalid image width");
|
---|
| 564 | if (*height == 0 || *height > PNG_UINT_31_MAX)
|
---|
| 565 | png_error(png_ptr, "Invalid image height");
|
---|
| 566 | if (info_ptr->width > (PNG_UINT_32_MAX
|
---|
| 567 | >> 3) /* 8-byte RGBA pixels */
|
---|
| 568 | - 64 /* bigrowbuf hack */
|
---|
| 569 | - 1 /* filter byte */
|
---|
| 570 | - 7*8 /* rounding of width to multiple of 8 pixels */
|
---|
| 571 | - 8) /* extra max_pixel_depth pad */
|
---|
| 572 | {
|
---|
| 573 | png_warning(png_ptr,
|
---|
| 574 | "Width too large for libpng to process image data.");
|
---|
| 575 | }
|
---|
| 576 | return (1);
|
---|
| 577 | }
|
---|
| 578 | return (0);
|
---|
| 579 | }
|
---|
| 580 |
|
---|
| 581 | #if defined(PNG_oFFs_SUPPORTED)
|
---|
| 582 | png_uint_32 PNGAPI
|
---|
| 583 | png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
|
---|
| 584 | png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
|
---|
| 585 | {
|
---|
| 586 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
|
---|
| 587 | && offset_x != NULL && offset_y != NULL && unit_type != NULL)
|
---|
| 588 | {
|
---|
| 589 | png_debug1(1, "in %s retrieval function\n", "oFFs");
|
---|
| 590 | *offset_x = info_ptr->x_offset;
|
---|
| 591 | *offset_y = info_ptr->y_offset;
|
---|
| 592 | *unit_type = (int)info_ptr->offset_unit_type;
|
---|
| 593 | return (PNG_INFO_oFFs);
|
---|
| 594 | }
|
---|
| 595 | return (0);
|
---|
| 596 | }
|
---|
| 597 | #endif
|
---|
| 598 |
|
---|
| 599 | #if defined(PNG_pCAL_SUPPORTED)
|
---|
| 600 | png_uint_32 PNGAPI
|
---|
| 601 | png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
|
---|
| 602 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
|
---|
| 603 | png_charp *units, png_charpp *params)
|
---|
| 604 | {
|
---|
| 605 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
|
---|
| 606 | && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
|
---|
| 607 | nparams != NULL && units != NULL && params != NULL)
|
---|
| 608 | {
|
---|
| 609 | png_debug1(1, "in %s retrieval function\n", "pCAL");
|
---|
| 610 | *purpose = info_ptr->pcal_purpose;
|
---|
| 611 | *X0 = info_ptr->pcal_X0;
|
---|
| 612 | *X1 = info_ptr->pcal_X1;
|
---|
| 613 | *type = (int)info_ptr->pcal_type;
|
---|
| 614 | *nparams = (int)info_ptr->pcal_nparams;
|
---|
| 615 | *units = info_ptr->pcal_units;
|
---|
| 616 | *params = info_ptr->pcal_params;
|
---|
| 617 | return (PNG_INFO_pCAL);
|
---|
| 618 | }
|
---|
| 619 | return (0);
|
---|
| 620 | }
|
---|
| 621 | #endif
|
---|
| 622 |
|
---|
| 623 | #if defined(PNG_sCAL_SUPPORTED)
|
---|
| 624 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
---|
| 625 | png_uint_32 PNGAPI
|
---|
| 626 | png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
|
---|
| 627 | int *unit, double *width, double *height)
|
---|
| 628 | {
|
---|
| 629 | if (png_ptr != NULL && info_ptr != NULL &&
|
---|
| 630 | (info_ptr->valid & PNG_INFO_sCAL))
|
---|
| 631 | {
|
---|
| 632 | *unit = info_ptr->scal_unit;
|
---|
| 633 | *width = info_ptr->scal_pixel_width;
|
---|
| 634 | *height = info_ptr->scal_pixel_height;
|
---|
| 635 | return (PNG_INFO_sCAL);
|
---|
| 636 | }
|
---|
| 637 | return(0);
|
---|
| 638 | }
|
---|
| 639 | #else
|
---|
| 640 | #ifdef PNG_FIXED_POINT_SUPPORTED
|
---|
| 641 | png_uint_32 PNGAPI
|
---|
| 642 | png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
|
---|
| 643 | int *unit, png_charpp width, png_charpp height)
|
---|
| 644 | {
|
---|
| 645 | if (png_ptr != NULL && info_ptr != NULL &&
|
---|
| 646 | (info_ptr->valid & PNG_INFO_sCAL))
|
---|
| 647 | {
|
---|
| 648 | *unit = info_ptr->scal_unit;
|
---|
| 649 | *width = info_ptr->scal_s_width;
|
---|
| 650 | *height = info_ptr->scal_s_height;
|
---|
| 651 | return (PNG_INFO_sCAL);
|
---|
| 652 | }
|
---|
| 653 | return(0);
|
---|
| 654 | }
|
---|
| 655 | #endif
|
---|
| 656 | #endif
|
---|
| 657 | #endif
|
---|
| 658 |
|
---|
| 659 | #if defined(PNG_pHYs_SUPPORTED)
|
---|
| 660 | png_uint_32 PNGAPI
|
---|
| 661 | png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
|
---|
| 662 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
|
---|
| 663 | {
|
---|
| 664 | png_uint_32 retval = 0;
|
---|
| 665 |
|
---|
| 666 | if (png_ptr != NULL && info_ptr != NULL &&
|
---|
| 667 | (info_ptr->valid & PNG_INFO_pHYs))
|
---|
| 668 | {
|
---|
| 669 | png_debug1(1, "in %s retrieval function\n", "pHYs");
|
---|
| 670 | if (res_x != NULL)
|
---|
| 671 | {
|
---|
| 672 | *res_x = info_ptr->x_pixels_per_unit;
|
---|
| 673 | retval |= PNG_INFO_pHYs;
|
---|
| 674 | }
|
---|
| 675 | if (res_y != NULL)
|
---|
| 676 | {
|
---|
| 677 | *res_y = info_ptr->y_pixels_per_unit;
|
---|
| 678 | retval |= PNG_INFO_pHYs;
|
---|
| 679 | }
|
---|
| 680 | if (unit_type != NULL)
|
---|
| 681 | {
|
---|
| 682 | *unit_type = (int)info_ptr->phys_unit_type;
|
---|
| 683 | retval |= PNG_INFO_pHYs;
|
---|
| 684 | }
|
---|
| 685 | }
|
---|
| 686 | return (retval);
|
---|
| 687 | }
|
---|
| 688 | #endif
|
---|
| 689 |
|
---|
| 690 | png_uint_32 PNGAPI
|
---|
| 691 | png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
|
---|
| 692 | int *num_palette)
|
---|
| 693 | {
|
---|
| 694 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
|
---|
| 695 | && palette != NULL)
|
---|
| 696 | {
|
---|
| 697 | png_debug1(1, "in %s retrieval function\n", "PLTE");
|
---|
| 698 | *palette = info_ptr->palette;
|
---|
| 699 | *num_palette = info_ptr->num_palette;
|
---|
| 700 | png_debug1(3, "num_palette = %d\n", *num_palette);
|
---|
| 701 | return (PNG_INFO_PLTE);
|
---|
| 702 | }
|
---|
| 703 | return (0);
|
---|
| 704 | }
|
---|
| 705 |
|
---|
| 706 | #if defined(PNG_sBIT_SUPPORTED)
|
---|
| 707 | png_uint_32 PNGAPI
|
---|
| 708 | png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
|
---|
| 709 | {
|
---|
| 710 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
|
---|
| 711 | && sig_bit != NULL)
|
---|
| 712 | {
|
---|
| 713 | png_debug1(1, "in %s retrieval function\n", "sBIT");
|
---|
| 714 | *sig_bit = &(info_ptr->sig_bit);
|
---|
| 715 | return (PNG_INFO_sBIT);
|
---|
| 716 | }
|
---|
| 717 | return (0);
|
---|
| 718 | }
|
---|
| 719 | #endif
|
---|
| 720 |
|
---|
| 721 | #if defined(PNG_TEXT_SUPPORTED)
|
---|
| 722 | png_uint_32 PNGAPI
|
---|
| 723 | png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
|
---|
| 724 | int *num_text)
|
---|
| 725 | {
|
---|
| 726 | if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
|
---|
| 727 | {
|
---|
| 728 | png_debug1(1, "in %s retrieval function\n",
|
---|
| 729 | (png_ptr->chunk_name[0] == '\0' ? "text"
|
---|
| 730 | : (png_const_charp)png_ptr->chunk_name));
|
---|
| 731 | if (text_ptr != NULL)
|
---|
| 732 | *text_ptr = info_ptr->text;
|
---|
| 733 | if (num_text != NULL)
|
---|
| 734 | *num_text = info_ptr->num_text;
|
---|
| 735 | return ((png_uint_32)info_ptr->num_text);
|
---|
| 736 | }
|
---|
| 737 | if (num_text != NULL)
|
---|
| 738 | *num_text = 0;
|
---|
| 739 | return(0);
|
---|
| 740 | }
|
---|
| 741 | #endif
|
---|
| 742 |
|
---|
| 743 | #if defined(PNG_tIME_SUPPORTED)
|
---|
| 744 | png_uint_32 PNGAPI
|
---|
| 745 | png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
|
---|
| 746 | {
|
---|
| 747 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
|
---|
| 748 | && mod_time != NULL)
|
---|
| 749 | {
|
---|
| 750 | png_debug1(1, "in %s retrieval function\n", "tIME");
|
---|
| 751 | *mod_time = &(info_ptr->mod_time);
|
---|
| 752 | return (PNG_INFO_tIME);
|
---|
| 753 | }
|
---|
| 754 | return (0);
|
---|
| 755 | }
|
---|
| 756 | #endif
|
---|
| 757 |
|
---|
| 758 | #if defined(PNG_tRNS_SUPPORTED)
|
---|
| 759 | png_uint_32 PNGAPI
|
---|
| 760 | png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
|
---|
| 761 | png_bytep *trans, int *num_trans, png_color_16p *trans_values)
|
---|
| 762 | {
|
---|
| 763 | png_uint_32 retval = 0;
|
---|
| 764 | if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
|
---|
| 765 | {
|
---|
| 766 | png_debug1(1, "in %s retrieval function\n", "tRNS");
|
---|
| 767 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
---|
| 768 | {
|
---|
| 769 | if (trans != NULL)
|
---|
| 770 | {
|
---|
| 771 | *trans = info_ptr->trans;
|
---|
| 772 | retval |= PNG_INFO_tRNS;
|
---|
| 773 | }
|
---|
| 774 | if (trans_values != NULL)
|
---|
| 775 | *trans_values = &(info_ptr->trans_values);
|
---|
| 776 | }
|
---|
| 777 | else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
|
---|
| 778 | {
|
---|
| 779 | if (trans_values != NULL)
|
---|
| 780 | {
|
---|
| 781 | *trans_values = &(info_ptr->trans_values);
|
---|
| 782 | retval |= PNG_INFO_tRNS;
|
---|
| 783 | }
|
---|
| 784 | if(trans != NULL)
|
---|
| 785 | *trans = NULL;
|
---|
| 786 | }
|
---|
| 787 | if(num_trans != NULL)
|
---|
| 788 | {
|
---|
| 789 | *num_trans = info_ptr->num_trans;
|
---|
| 790 | retval |= PNG_INFO_tRNS;
|
---|
| 791 | }
|
---|
| 792 | }
|
---|
| 793 | return (retval);
|
---|
| 794 | }
|
---|
| 795 | #endif
|
---|
| 796 |
|
---|
| 797 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
---|
| 798 | png_uint_32 PNGAPI
|
---|
| 799 | png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
|
---|
| 800 | png_unknown_chunkpp unknowns)
|
---|
| 801 | {
|
---|
| 802 | if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
|
---|
| 803 | *unknowns = info_ptr->unknown_chunks;
|
---|
| 804 | return ((png_uint_32)info_ptr->unknown_chunks_num);
|
---|
| 805 | }
|
---|
| 806 | #endif
|
---|
| 807 |
|
---|
| 808 | #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
|
---|
| 809 | png_byte PNGAPI
|
---|
| 810 | png_get_rgb_to_gray_status (png_structp png_ptr)
|
---|
| 811 | {
|
---|
| 812 | return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
|
---|
| 813 | }
|
---|
| 814 | #endif
|
---|
| 815 |
|
---|
| 816 | #if defined(PNG_USER_CHUNKS_SUPPORTED)
|
---|
| 817 | png_voidp PNGAPI
|
---|
| 818 | png_get_user_chunk_ptr(png_structp png_ptr)
|
---|
| 819 | {
|
---|
| 820 | return (png_ptr? png_ptr->user_chunk_ptr : NULL);
|
---|
| 821 | }
|
---|
| 822 | #endif
|
---|
| 823 |
|
---|
| 824 | #ifdef PNG_WRITE_SUPPORTED
|
---|
| 825 | png_uint_32 PNGAPI
|
---|
| 826 | png_get_compression_buffer_size(png_structp png_ptr)
|
---|
| 827 | {
|
---|
| 828 | return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
|
---|
| 829 | }
|
---|
| 830 | #endif
|
---|
| 831 |
|
---|
| 832 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
---|
| 833 | #ifndef PNG_1_0_X
|
---|
| 834 | /* this function was added to libpng 1.2.0 and should exist by default */
|
---|
| 835 | png_uint_32 PNGAPI
|
---|
| 836 | png_get_asm_flags (png_structp png_ptr)
|
---|
| 837 | {
|
---|
| 838 | #ifdef PNG_MMX_CODE_SUPPORTED
|
---|
| 839 | return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L);
|
---|
| 840 | #else
|
---|
| 841 | return (png_ptr? 0L: 0L);
|
---|
| 842 | #endif
|
---|
| 843 | }
|
---|
| 844 |
|
---|
| 845 | /* this function was added to libpng 1.2.0 and should exist by default */
|
---|
| 846 | png_uint_32 PNGAPI
|
---|
| 847 | png_get_asm_flagmask (int flag_select)
|
---|
| 848 | {
|
---|
| 849 | #ifdef PNG_MMX_CODE_SUPPORTED
|
---|
| 850 | png_uint_32 settable_asm_flags = 0;
|
---|
| 851 |
|
---|
| 852 | if (flag_select & PNG_SELECT_READ)
|
---|
| 853 | settable_asm_flags |=
|
---|
| 854 | PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
|
---|
| 855 | PNG_ASM_FLAG_MMX_READ_INTERLACE |
|
---|
| 856 | PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
|
---|
| 857 | PNG_ASM_FLAG_MMX_READ_FILTER_UP |
|
---|
| 858 | PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
|
---|
| 859 | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
|
---|
| 860 | /* no non-MMX flags yet */
|
---|
| 861 |
|
---|
| 862 | #if 0
|
---|
| 863 | /* GRR: no write-flags yet, either, but someday... */
|
---|
| 864 | if (flag_select & PNG_SELECT_WRITE)
|
---|
| 865 | settable_asm_flags |=
|
---|
| 866 | PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
|
---|
| 867 | #endif /* 0 */
|
---|
| 868 |
|
---|
| 869 | return settable_asm_flags; /* _theoretically_ settable capabilities only */
|
---|
| 870 | #else
|
---|
| 871 | return (0L);
|
---|
| 872 | #endif /* PNG_MMX_CODE_SUPPORTED */
|
---|
| 873 | }
|
---|
| 874 |
|
---|
| 875 |
|
---|
| 876 | /* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
|
---|
| 877 | /* this function was added to libpng 1.2.0 */
|
---|
| 878 | png_uint_32 PNGAPI
|
---|
| 879 | png_get_mmx_flagmask (int flag_select, int *compilerID)
|
---|
| 880 | {
|
---|
| 881 | #if defined(PNG_MMX_CODE_SUPPORTED)
|
---|
| 882 | png_uint_32 settable_mmx_flags = 0;
|
---|
| 883 |
|
---|
| 884 | if (flag_select & PNG_SELECT_READ)
|
---|
| 885 | settable_mmx_flags |=
|
---|
| 886 | PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
|
---|
| 887 | PNG_ASM_FLAG_MMX_READ_INTERLACE |
|
---|
| 888 | PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
|
---|
| 889 | PNG_ASM_FLAG_MMX_READ_FILTER_UP |
|
---|
| 890 | PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
|
---|
| 891 | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
|
---|
| 892 | #if 0
|
---|
| 893 | /* GRR: no MMX write support yet, but someday... */
|
---|
| 894 | if (flag_select & PNG_SELECT_WRITE)
|
---|
| 895 | settable_mmx_flags |=
|
---|
| 896 | PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
|
---|
| 897 | #endif /* 0 */
|
---|
| 898 |
|
---|
| 899 | if (compilerID != NULL) {
|
---|
| 900 | #ifdef PNG_USE_PNGVCRD
|
---|
| 901 | *compilerID = 1; /* MSVC */
|
---|
| 902 | #else
|
---|
| 903 | #ifdef PNG_USE_PNGGCCRD
|
---|
| 904 | *compilerID = 2; /* gcc/gas */
|
---|
| 905 | #else
|
---|
| 906 | *compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
|
---|
| 907 | #endif
|
---|
| 908 | #endif
|
---|
| 909 | }
|
---|
| 910 |
|
---|
| 911 | return settable_mmx_flags; /* _theoretically_ settable capabilities only */
|
---|
| 912 | #else
|
---|
| 913 | return (0L);
|
---|
| 914 | #endif /* ?PNG_MMX_CODE_SUPPORTED */
|
---|
| 915 | }
|
---|
| 916 |
|
---|
| 917 | /* this function was added to libpng 1.2.0 */
|
---|
| 918 | png_byte PNGAPI
|
---|
| 919 | png_get_mmx_bitdepth_threshold (png_structp png_ptr)
|
---|
| 920 | {
|
---|
| 921 | #if defined(PNG_MMX_CODE_SUPPORTED)
|
---|
| 922 | return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0);
|
---|
| 923 | #else
|
---|
| 924 | return (png_ptr? 0: 0);
|
---|
| 925 | #endif /* ?PNG_MMX_CODE_SUPPORTED */
|
---|
| 926 | }
|
---|
| 927 |
|
---|
| 928 | /* this function was added to libpng 1.2.0 */
|
---|
| 929 | png_uint_32 PNGAPI
|
---|
| 930 | png_get_mmx_rowbytes_threshold (png_structp png_ptr)
|
---|
| 931 | {
|
---|
| 932 | #if defined(PNG_MMX_CODE_SUPPORTED)
|
---|
| 933 | return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L);
|
---|
| 934 | #else
|
---|
| 935 | return (png_ptr? 0L: 0L);
|
---|
| 936 | #endif /* ?PNG_MMX_CODE_SUPPORTED */
|
---|
| 937 | }
|
---|
| 938 | #endif /* ?PNG_1_0_X */
|
---|
| 939 | #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
|
---|
| 940 |
|
---|
| 941 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED
|
---|
| 942 | /* these functions were added to libpng 1.2.6 */
|
---|
| 943 | png_uint_32 PNGAPI
|
---|
| 944 | png_get_user_width_max (png_structp png_ptr)
|
---|
| 945 | {
|
---|
| 946 | return (png_ptr? png_ptr->user_width_max : 0);
|
---|
| 947 | }
|
---|
| 948 | png_uint_32 PNGAPI
|
---|
| 949 | png_get_user_height_max (png_structp png_ptr)
|
---|
| 950 | {
|
---|
| 951 | return (png_ptr? png_ptr->user_height_max : 0);
|
---|
| 952 | }
|
---|
| 953 | #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
|
---|
| 954 |
|
---|
| 955 | #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
---|