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comparison: image/src/BMPFileHeaders.h
image/src/BMPFileHeaders.h
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| -1:000000000000 | 0:24cdcfdb4595 |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #ifndef MOZILLA_IMAGELIB_BMPHEADERS_H_ | |
| 6 #define MOZILLA_IMAGELIB_BMPHEADERS_H_ | |
| 7 | |
| 8 namespace mozilla { | |
| 9 namespace image { | |
| 10 | |
| 11 struct BMPFILEHEADER { | |
| 12 char signature[2]; // String "BM" | |
| 13 uint32_t filesize; | |
| 14 int32_t reserved; // Zero | |
| 15 uint32_t dataoffset; // Offset to raster data | |
| 16 | |
| 17 uint32_t bihsize; | |
| 18 }; | |
| 19 | |
| 20 // The length of the bitmap file header as defined in the BMP spec. | |
| 21 #define BFH_LENGTH 14 | |
| 22 // Internally we store the bitmap file header with an additional 4 bytes which | |
| 23 // is used to store the bitmap information header size. | |
| 24 #define BFH_INTERNAL_LENGTH 18 | |
| 25 | |
| 26 #define OS2_INTERNAL_BIH_LENGTH 8 | |
| 27 #define WIN_V3_INTERNAL_BIH_LENGTH 36 | |
| 28 #define WIN_V5_INTERNAL_BIH_LENGTH 120 | |
| 29 | |
| 30 #define OS2_BIH_LENGTH 12 // This is the real BIH size (as contained in the bihsize field of BMPFILEHEADER) | |
| 31 #define WIN_V3_BIH_LENGTH 40 // This is the real BIH size (as contained in the bihsize field of BMPFILEHEADER) | |
| 32 #define WIN_V5_BIH_LENGTH 124 // This is the real BIH size (as contained in the bihsize field of BMPFILEHEADER) | |
| 33 | |
| 34 #define OS2_HEADER_LENGTH (BFH_INTERNAL_LENGTH + OS2_INTERNAL_BIH_LENGTH) | |
| 35 #define WIN_V3_HEADER_LENGTH (BFH_INTERNAL_LENGTH + WIN_V3_INTERNAL_BIH_LENGTH) | |
| 36 #define WIN_V5_HEADER_LENGTH (BFH_INTERNAL_LENGTH + WIN_V5_INTERNAL_BIH_LENGTH) | |
| 37 | |
| 38 #ifndef LCS_sRGB | |
| 39 #define LCS_sRGB 0x73524742 | |
| 40 #endif | |
| 41 | |
| 42 struct xyz { | |
| 43 int32_t x, y, z; | |
| 44 }; | |
| 45 | |
| 46 struct xyzTriple { | |
| 47 xyz r, g, b; | |
| 48 }; | |
| 49 | |
| 50 struct BITMAPV5HEADER { | |
| 51 int32_t width; // Uint16 in OS/2 BMPs | |
| 52 int32_t height; // Uint16 in OS/2 BMPs | |
| 53 uint16_t planes; // =1 | |
| 54 uint16_t bpp; // Bits per pixel. | |
| 55 // The rest of the header is not available in OS/2 BMP Files | |
| 56 uint32_t compression; // 0=no compression 1=8bit RLE 2=4bit RLE | |
| 57 uint32_t image_size; // (compressed) image size. Can be 0 if compression==0 | |
| 58 uint32_t xppm; // Pixels per meter, horizontal | |
| 59 uint32_t yppm; // Pixels per meter, vertical | |
| 60 uint32_t colors; // Used Colors | |
| 61 uint32_t important_colors; // Number of important colors. 0=all | |
| 62 uint32_t red_mask; // Bits used for red component | |
| 63 uint32_t green_mask; // Bits used for green component | |
| 64 uint32_t blue_mask; // Bits used for blue component | |
| 65 uint32_t alpha_mask; // Bits used for alpha component | |
| 66 uint32_t color_space; // 0x73524742=LCS_sRGB ... | |
| 67 // These members are unused unless color_space == LCS_CALIBRATED_RGB | |
| 68 xyzTriple white_point; // Logical white point | |
| 69 uint32_t gamma_red; // Red gamma component | |
| 70 uint32_t gamma_green; // Green gamma component | |
| 71 uint32_t gamma_blue; // Blue gamma component | |
| 72 uint32_t intent; // Rendering intent | |
| 73 // These members are unused unless color_space == LCS_PROFILE_* | |
| 74 uint32_t profile_offset; // Offset to profile data in bytes | |
| 75 uint32_t profile_size; // Size of profile data in bytes | |
| 76 uint32_t reserved; // =0 | |
| 77 }; | |
| 78 | |
| 79 struct colorTable { | |
| 80 uint8_t red; | |
| 81 uint8_t green; | |
| 82 uint8_t blue; | |
| 83 }; | |
| 84 | |
| 85 struct bitFields { | |
| 86 uint32_t red; | |
| 87 uint32_t green; | |
| 88 uint32_t blue; | |
| 89 uint8_t redLeftShift; | |
| 90 uint8_t redRightShift; | |
| 91 uint8_t greenLeftShift; | |
| 92 uint8_t greenRightShift; | |
| 93 uint8_t blueLeftShift; | |
| 94 uint8_t blueRightShift; | |
| 95 }; | |
| 96 | |
| 97 } // namespace image | |
| 98 } // namespace mozilla | |
| 99 | |
| 100 #define BITFIELD_LENGTH 12 // Length of the bitfields structure in the bmp file | |
| 101 #define USE_RGB | |
| 102 | |
| 103 // BMPINFOHEADER.compression defines | |
| 104 #ifndef BI_RGB | |
| 105 #define BI_RGB 0 | |
| 106 #endif | |
| 107 #ifndef BI_RLE8 | |
| 108 #define BI_RLE8 1 | |
| 109 #endif | |
| 110 #ifndef BI_RLE4 | |
| 111 #define BI_RLE4 2 | |
| 112 #endif | |
| 113 #ifndef BI_BITFIELDS | |
| 114 #define BI_BITFIELDS 3 | |
| 115 #endif | |
| 116 // BI_ALPHABITFIELDS means no compression and specifies alpha bits | |
| 117 // valid only for 32bpp and 16bpp | |
| 118 #ifndef BI_ALPHABITFIELDS | |
| 119 #define BI_ALPHABITFIELDS 4 | |
| 120 #endif | |
| 121 | |
| 122 // RLE Escape codes | |
| 123 #define RLE_ESCAPE 0 | |
| 124 #define RLE_ESCAPE_EOL 0 | |
| 125 #define RLE_ESCAPE_EOF 1 | |
| 126 #define RLE_ESCAPE_DELTA 2 | |
| 127 | |
| 128 /// enums for mState | |
| 129 enum ERLEState { | |
| 130 eRLEStateInitial, | |
| 131 eRLEStateNeedSecondEscapeByte, | |
| 132 eRLEStateNeedXDelta, | |
| 133 eRLEStateNeedYDelta, ///< mStateData will hold x delta | |
| 134 eRLEStateAbsoluteMode, ///< mStateData will hold count of existing data to read | |
| 135 eRLEStateAbsoluteModePadded ///< As above, but another byte of data has to be read as padding | |
| 136 }; | |
| 137 | |
| 138 #endif |
