gecko/image/BMPFileHeaders.h
Nicholas Nethercote 7b48f0bb0c Bug 1213613 (part 2) - Move some BMP-related structs. r=seth.
This patch moves them into less exposed places. It also moves the RLE_*
constants into the RLE enum, and renames ColorTable and its fields.
2015-10-13 16:43:18 -07:00

85 lines
2.8 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_image_BMPFileHeaders_h
#define mozilla_image_BMPFileHeaders_h
#include <stddef.h>
#include <stdint.h>
namespace mozilla {
namespace image {
namespace bmp {
// This length is stored in the |bihsize| field of bmp::FileHeader.
struct InfoHeaderLength {
enum {
WIN_V2 = 12,
WIN_V3 = 40,
WIN_V4 = 108,
WIN_V5 = 124,
// OS2_V1 is omitted; it's the same as WIN_V2.
OS2_V2_MIN = 16, // Minimum allowed value for OS2v2.
OS2_V2_MAX = 64, // Maximum allowed value for OS2v2.
};
};
struct FileHeader {
char signature[2]; // String "BM".
uint32_t filesize; // File size; unreliable in practice.
int32_t reserved; // Zero.
uint32_t dataoffset; // Offset to raster data.
// The length of the file header as defined in the BMP spec.
static const size_t LENGTH = 14;
};
struct XYZ {
int32_t x, y, z;
};
struct XYZTriple {
XYZ r, g, b;
};
struct V5InfoHeader {
uint32_t bihsize; // Header size
int32_t width; // Uint16 in OS/2 BMPs
int32_t height; // Uint16 in OS/2 BMPs
uint16_t planes; // =1
uint16_t bpp; // Bits per pixel.
// The rest of the header is not available in WIN_V2/OS2_V1 BMP Files
uint32_t compression; // See Compression for valid values
uint32_t image_size; // (compressed) image size. Can be 0 if
// compression==0
uint32_t xppm; // Pixels per meter, horizontal
uint32_t yppm; // Pixels per meter, vertical
uint32_t colors; // Used Colors
uint32_t important_colors; // Number of important colors. 0=all
uint32_t red_mask; // Bits used for red component
uint32_t green_mask; // Bits used for green component
uint32_t blue_mask; // Bits used for blue component
uint32_t alpha_mask; // Bits used for alpha component
uint32_t color_space; // 0x73524742=LCS_sRGB ...
// These members are unused unless color_space == LCS_CALIBRATED_RGB
XYZTriple white_point; // Logical white point
uint32_t gamma_red; // Red gamma component
uint32_t gamma_green; // Green gamma component
uint32_t gamma_blue; // Blue gamma component
uint32_t intent; // Rendering intent
// These members are unused unless color_space == LCS_PROFILE_*
uint32_t profile_offset; // Offset to profile data in bytes
uint32_t profile_size; // Size of profile data in bytes
uint32_t reserved; // =0
static const uint32_t COLOR_SPACE_LCS_SRGB = 0x73524742;
};
} // namespace bmp
} // namespace image
} // namespace mozilla
#endif // mozilla_image_BMPFileHeaders_h