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xmg.h

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00001 /* ResidualVM - A 3D game interpreter
00002  *
00003  * ResidualVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the AUTHORS
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 #ifndef STARK_XMG_H
00024 #define STARK_XMG_H
00025 
00026 #include "common/stream.h"
00027 
00028 namespace Graphics {
00029     struct Surface;
00030 }
00031 
00032 namespace Stark {
00033 namespace Formats {
00034 
00038 class XMGDecoder {
00039 public:
00040     static Graphics::Surface *decode(Common::ReadStream *stream);
00041     static void readSize(Common::ReadStream *stream, uint &width, uint &height);
00042 
00043 private:
00044     explicit XMGDecoder(Common::ReadStream *stream);
00045 
00046     struct Block {
00047         uint32 a1, a2;
00048         uint32 b1, b2;
00049     };
00050 
00051     void readHeader();
00052     Graphics::Surface *decodeImage();
00053     Block decodeBlock(byte op);
00054     void drawBlock(const Block &block, Graphics::Surface *surface);
00055 
00056     Block processYCrCb();
00057     Block processTrans();
00058     Block processRGB();
00059 
00060     uint32 _width;
00061     uint32 _height;
00062 
00063     uint32 _currX;
00064     uint32 _currY;
00065 
00066     Common::ReadStream *_stream;
00067 
00073     uint32 _transColor;
00074 };
00075 
00076 } // End of namespace Formats
00077 } // End of namespace Stark
00078 
00079 #endif // STARK_XMG_H


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