src/bmp.h

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file bmp.h Read and write support for bmps. */
   9
  10 #ifndef BMP_H
  11 #define BMP_H
  12
  13 #include "gfx_type.h"
  14
  15 struct BmpInfo {
  16         uint32 offset;       ///< offset of bitmap data from .bmp file beginning
  17         uint32 width;        ///< bitmap width
  18         uint32 height;       ///< bitmap height
  19         bool os2_bmp;        ///< true if OS/2 1.x or windows 2.x bitmap
  20         uint16 bpp;          ///< bits per pixel
  21         uint32 compression;  ///< compression method (0 = none, 1 = 8-bit RLE, 2 = 4-bit RLE)
  22         uint32 palette_size; ///< number of colours in palette
  23 };
  24
  25 struct BmpData {
  26         Colour *palette;
  27         byte   *bitmap;
  28 };
  29
  30 #define BMP_BUFFER_SIZE 1024
  31
  32 struct BmpBuffer {
  33         byte data[BMP_BUFFER_SIZE];
  34         int pos;
  35         int read;
  36         FILE *file;
  37         uint real_pos;
  38 };
  39
  40 void BmpInitializeBuffer(BmpBuffer *buffer, FILE *file);
  41 bool BmpReadHeader(BmpBuffer *buffer, BmpInfo *info, BmpData *data);
  42 bool BmpReadBitmap(BmpBuffer *buffer, BmpInfo *info, BmpData *data);
  43 void BmpDestroyData(BmpData *data);
  44
  45 #endif /* BMP_H */