src/bmp.h

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file bmp.h Read and write support for bmps. */
  11
  12 #ifndef BMP_H
  13 #define BMP_H
  14
  15 #include "gfx_type.h"
  16
  17 struct BmpInfo {
  18         uint32 offset;       ///< offset of bitmap data from .bmp file begining
  19         uint32 width;        ///< bitmap width
  20         uint32 height;       ///< bitmap height
  21         bool os2_bmp;        ///< true if OS/2 1.x or windows 2.x bitmap
  22         uint16 bpp;          ///< bits per pixel
  23         uint32 compression;  ///< compression method (0 = none, 1 = 8-bit RLE, 2 = 4-bit RLE)
  24         uint32 palette_size; ///< number of colours in palette
  25 };
  26
  27 struct BmpData {
  28         Colour *palette;
  29         byte   *bitmap;
  30 };
  31
  32 #define BMP_BUFFER_SIZE 1024
  33
  34 struct BmpBuffer {
  35         byte data[BMP_BUFFER_SIZE];
  36         int pos;
  37         int read;
  38         FILE *file;
  39         uint real_pos;
  40 };
  41
  42 void BmpInitializeBuffer(BmpBuffer *buffer, FILE *file);
  43 bool BmpReadHeader(BmpBuffer *buffer, BmpInfo *info, BmpData *data);
  44 bool BmpReadBitmap(BmpBuffer *buffer, BmpInfo *info, BmpData *data);
  45 void BmpDestroyData(BmpData *data);
  46
  47 #endif /* BMP_H */