include/bmp_layout.h

   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 struct __packed bmp_color_table_entry {
  14         __u8    blue;
  15         __u8    green;
  16         __u8    red;
  17         __u8    reserved;
  18 };
  19
  20 /* When accessing these fields, remember that they are stored in little
  21    endian format, so use linux macros, e.g. le32_to_cpu(width)          */
  22
  23 struct __packed bmp_header {
  24         /* Header */
  25         char signature[2];
  26         __u32   file_size;
  27         __u32   reserved;
  28         __u32   data_offset;
  29         /* InfoHeader */
  30         __u32   size;
  31         __u32   width;
  32         __u32   height;
  33         __u16   planes;
  34         __u16   bit_count;
  35         __u32   compression;
  36         __u32   image_size;
  37         __u32   x_pixels_per_m;
  38         __u32   y_pixels_per_m;
  39         __u32   colors_used;
  40         __u32   colors_important;
  41         /* ColorTable */
  42 };
  43
  44 struct bmp_image {
  45         struct bmp_header header;
  46         /* We use a zero sized array just as a placeholder for variable
  47            sized array */
  48         struct bmp_color_table_entry color_table[0];
  49 };
  50
  51 /* Data in the bmp_image is aligned to this length */
  52 #define BMP_DATA_ALIGN  4
  53
  54 /* Constants for the compression field */
  55 #define BMP_BI_RGB      0
  56 #define BMP_BI_RLE8     1
  57 #define BMP_BI_RLE4     2
  58
  59 #endif                                                  /* _BMP_H_ */