include/bmp_layout.h

/* (C) Copyright 2002
 * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/************************************************************************/
/* ** Layout of a bmp file						*/
/************************************************************************/

#ifndef _BMP_H_
#define _BMP_H_

typedef struct bmp_color_table_entry {
  __u8 blue;
  __u8 green;
  __u8 red;
  __u8 reserved;
} __attribute__((packed)) bmp_color_table_entry_t;

/* When accessing these fields, remember that they are stored in little
   endian format, so use linux macros, e.g. le32_to_cpu(width)          */

typedef	struct bmp_header {
  /* Header */
  char signature[2];
  __u32 file_size;
  __u32 reserved;
  __u32 data_offset;
  /* InfoHeader */
  __u32 size;
  __u32 width;
  __u32 height;
  __u16 planes;
  __u16 bit_count;
  __u32 compression;
  __u32 image_size;
  __u32 x_pixels_per_m;
  __u32 y_pixels_per_m;
  __u32 colors_used;
  __u32 colors_important;
  /* ColorTable */

}  __attribute__((packed)) bmp_header_t;

typedef struct bmp_image {
  bmp_header_t header;
  /* We use a zero sized array just as a placeholder for variable
     sized array */
  bmp_color_table_entry_t color_table[0];
} bmp_image_t;

/* Data in the bmp_image is aligned to this length */
#define BMP_DATA_ALIGN 4

/* Constants for the compression field */
#define BMP_BI_RGB  0
#define BMP_BI_RLE8 1
#define BMP_BI_RLE4 2

#endif /* _BMP_H_ */