include/bmp_layout.h

   1 /* (C) Copyright 2002
   2  * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 /************************************************************************/
  24 /* ** Layout of a bmp file                                              */
  25 /************************************************************************/
  26
  27 #ifndef _BMP_H_
  28 #define _BMP_H_
  29
  30 typedef struct bmp_color_table_entry {
  31         __u8    blue;
  32         __u8    green;
  33         __u8    red;
  34         __u8    reserved;
  35 } __attribute__ ((packed)) bmp_color_table_entry_t;
  36
  37 /* When accessing these fields, remember that they are stored in little
  38    endian format, so use linux macros, e.g. le32_to_cpu(width)          */
  39
  40 typedef struct bmp_header {
  41         /* Header */
  42         char signature[2];
  43         __u32   file_size;
  44         __u32   reserved;
  45         __u32   data_offset;
  46         /* InfoHeader */
  47         __u32   size;
  48         __u32   width;
  49         __u32   height;
  50         __u16   planes;
  51         __u16   bit_count;
  52         __u32   compression;
  53         __u32   image_size;
  54         __u32   x_pixels_per_m;
  55         __u32   y_pixels_per_m;
  56         __u32   colors_used;
  57         __u32   colors_important;
  58         /* ColorTable */
  59
  60 } __attribute__ ((packed)) bmp_header_t;
  61
  62 typedef struct bmp_image {
  63         bmp_header_t header;
  64         /* We use a zero sized array just as a placeholder for variable
  65            sized array */
  66         bmp_color_table_entry_t color_table[0];
  67 } bmp_image_t;
  68
  69 /* Data in the bmp_image is aligned to this length */
  70 #define BMP_DATA_ALIGN  4
  71
  72 /* Constants for the compression field */
  73 #define BMP_BI_RGB      0
  74 #define BMP_BI_RLE8     1
  75 #define BMP_BI_RLE4     2
  76
  77 #endif                                                  /* _BMP_H_ */