1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/src/BMPFileHeaders.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,138 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#ifndef MOZILLA_IMAGELIB_BMPHEADERS_H_
1.9 +#define MOZILLA_IMAGELIB_BMPHEADERS_H_
1.10 +
1.11 +namespace mozilla {
1.12 + namespace image {
1.13 +
1.14 + struct BMPFILEHEADER {
1.15 + char signature[2]; // String "BM"
1.16 + uint32_t filesize;
1.17 + int32_t reserved; // Zero
1.18 + uint32_t dataoffset; // Offset to raster data
1.19 +
1.20 + uint32_t bihsize;
1.21 + };
1.22 +
1.23 +// The length of the bitmap file header as defined in the BMP spec.
1.24 +#define BFH_LENGTH 14
1.25 +// Internally we store the bitmap file header with an additional 4 bytes which
1.26 +// is used to store the bitmap information header size.
1.27 +#define BFH_INTERNAL_LENGTH 18
1.28 +
1.29 +#define OS2_INTERNAL_BIH_LENGTH 8
1.30 +#define WIN_V3_INTERNAL_BIH_LENGTH 36
1.31 +#define WIN_V5_INTERNAL_BIH_LENGTH 120
1.32 +
1.33 +#define OS2_BIH_LENGTH 12 // This is the real BIH size (as contained in the bihsize field of BMPFILEHEADER)
1.34 +#define WIN_V3_BIH_LENGTH 40 // This is the real BIH size (as contained in the bihsize field of BMPFILEHEADER)
1.35 +#define WIN_V5_BIH_LENGTH 124 // This is the real BIH size (as contained in the bihsize field of BMPFILEHEADER)
1.36 +
1.37 +#define OS2_HEADER_LENGTH (BFH_INTERNAL_LENGTH + OS2_INTERNAL_BIH_LENGTH)
1.38 +#define WIN_V3_HEADER_LENGTH (BFH_INTERNAL_LENGTH + WIN_V3_INTERNAL_BIH_LENGTH)
1.39 +#define WIN_V5_HEADER_LENGTH (BFH_INTERNAL_LENGTH + WIN_V5_INTERNAL_BIH_LENGTH)
1.40 +
1.41 +#ifndef LCS_sRGB
1.42 +#define LCS_sRGB 0x73524742
1.43 +#endif
1.44 +
1.45 + struct xyz {
1.46 + int32_t x, y, z;
1.47 + };
1.48 +
1.49 + struct xyzTriple {
1.50 + xyz r, g, b;
1.51 + };
1.52 +
1.53 + struct BITMAPV5HEADER {
1.54 + int32_t width; // Uint16 in OS/2 BMPs
1.55 + int32_t height; // Uint16 in OS/2 BMPs
1.56 + uint16_t planes; // =1
1.57 + uint16_t bpp; // Bits per pixel.
1.58 + // The rest of the header is not available in OS/2 BMP Files
1.59 + uint32_t compression; // 0=no compression 1=8bit RLE 2=4bit RLE
1.60 + uint32_t image_size; // (compressed) image size. Can be 0 if compression==0
1.61 + uint32_t xppm; // Pixels per meter, horizontal
1.62 + uint32_t yppm; // Pixels per meter, vertical
1.63 + uint32_t colors; // Used Colors
1.64 + uint32_t important_colors; // Number of important colors. 0=all
1.65 + uint32_t red_mask; // Bits used for red component
1.66 + uint32_t green_mask; // Bits used for green component
1.67 + uint32_t blue_mask; // Bits used for blue component
1.68 + uint32_t alpha_mask; // Bits used for alpha component
1.69 + uint32_t color_space; // 0x73524742=LCS_sRGB ...
1.70 + // These members are unused unless color_space == LCS_CALIBRATED_RGB
1.71 + xyzTriple white_point; // Logical white point
1.72 + uint32_t gamma_red; // Red gamma component
1.73 + uint32_t gamma_green; // Green gamma component
1.74 + uint32_t gamma_blue; // Blue gamma component
1.75 + uint32_t intent; // Rendering intent
1.76 + // These members are unused unless color_space == LCS_PROFILE_*
1.77 + uint32_t profile_offset; // Offset to profile data in bytes
1.78 + uint32_t profile_size; // Size of profile data in bytes
1.79 + uint32_t reserved; // =0
1.80 + };
1.81 +
1.82 + struct colorTable {
1.83 + uint8_t red;
1.84 + uint8_t green;
1.85 + uint8_t blue;
1.86 + };
1.87 +
1.88 + struct bitFields {
1.89 + uint32_t red;
1.90 + uint32_t green;
1.91 + uint32_t blue;
1.92 + uint8_t redLeftShift;
1.93 + uint8_t redRightShift;
1.94 + uint8_t greenLeftShift;
1.95 + uint8_t greenRightShift;
1.96 + uint8_t blueLeftShift;
1.97 + uint8_t blueRightShift;
1.98 + };
1.99 +
1.100 + } // namespace image
1.101 +} // namespace mozilla
1.102 +
1.103 +#define BITFIELD_LENGTH 12 // Length of the bitfields structure in the bmp file
1.104 +#define USE_RGB
1.105 +
1.106 +// BMPINFOHEADER.compression defines
1.107 +#ifndef BI_RGB
1.108 +#define BI_RGB 0
1.109 +#endif
1.110 +#ifndef BI_RLE8
1.111 +#define BI_RLE8 1
1.112 +#endif
1.113 +#ifndef BI_RLE4
1.114 +#define BI_RLE4 2
1.115 +#endif
1.116 +#ifndef BI_BITFIELDS
1.117 +#define BI_BITFIELDS 3
1.118 +#endif
1.119 +// BI_ALPHABITFIELDS means no compression and specifies alpha bits
1.120 +// valid only for 32bpp and 16bpp
1.121 +#ifndef BI_ALPHABITFIELDS
1.122 +#define BI_ALPHABITFIELDS 4
1.123 +#endif
1.124 +
1.125 +// RLE Escape codes
1.126 +#define RLE_ESCAPE 0
1.127 +#define RLE_ESCAPE_EOL 0
1.128 +#define RLE_ESCAPE_EOF 1
1.129 +#define RLE_ESCAPE_DELTA 2
1.130 +
1.131 +/// enums for mState
1.132 +enum ERLEState {
1.133 + eRLEStateInitial,
1.134 + eRLEStateNeedSecondEscapeByte,
1.135 + eRLEStateNeedXDelta,
1.136 + eRLEStateNeedYDelta, ///< mStateData will hold x delta
1.137 + eRLEStateAbsoluteMode, ///< mStateData will hold count of existing data to read
1.138 + eRLEStateAbsoluteModePadded ///< As above, but another byte of data has to be read as padding
1.139 +};
1.140 +
1.141 +#endif
