include/bmp_layout.h

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