bmp_layout.h

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/* (C) Copyright 2002
 * Detlev Zundel, DENX Software Engineering, [e-mail].
 *
 * 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_ */