1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /* (C) Copyright 2002
3  * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
4  */
5 
6 /************************************************************************/
7 /* ** Layout of a bmp file						*/
8 /************************************************************************/
9 
10 #ifndef _BMP_H_
11 #define _BMP_H_
12 
13 #include <linux/compiler.h>
14 
15 struct __packed bmp_color_table_entry {
16 	__u8	blue;
17 	__u8	green;
18 	__u8	red;
19 	__u8	reserved;
20 };
21 
22 /* When accessing these fields, remember that they are stored in little
23    endian format, so use linux macros, e.g. le32_to_cpu(width)          */
24 
25 struct __packed bmp_header {
26 	/* Header */
27 	char signature[2];
28 	__u32	file_size;
29 	__u32	reserved;
30 	__u32	data_offset;
31 	/* InfoHeader */
32 	__u32	size;
33 	__u32	width;
34 	__u32	height;
35 	__u16	planes;
36 	__u16	bit_count;
37 	__u32	compression;
38 	__u32	image_size;
39 	__u32	x_pixels_per_m;
40 	__u32	y_pixels_per_m;
41 	__u32	colors_used;
42 	__u32	colors_important;
43 	/* ColorTable */
44 };
45 
46 struct bmp_image {
47 	struct bmp_header header;
48 	/* We use a zero sized array just as a placeholder for variable
49 	   sized array */
50 	struct bmp_color_table_entry color_table[0];
51 };
52 
53 /* Data in the bmp_image is aligned to this length */
54 #define BMP_DATA_ALIGN	4
55 
56 /* Constants for the compression field */
57 #define BMP_BI_RGB	0
58 #define BMP_BI_RLE8	1
59 #define BMP_BI_RLE4	2
60 
61 #endif							/* _BMP_H_ */
62