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1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /* (C) Copyright 2002
3  * Detlev Zundel, DENX Software Engineering, [email protected].
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_ */
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