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Diffstat (limited to 'engines/dm/lzw.h')
-rw-r--r-- | engines/dm/lzw.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/engines/dm/lzw.h b/engines/dm/lzw.h new file mode 100644 index 0000000000..313b74b6d8 --- /dev/null +++ b/engines/dm/lzw.h @@ -0,0 +1,69 @@ +/* ScummVM - Graphic Adventure Engine +* +* ScummVM is the legal property of its developers, whose names +* are too numerous to list here. Please refer to the COPYRIGHT +* file distributed with this source distribution. +* +* This program 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; either version 2 +* of the License, or (at your option) any later version. +* +* This program 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. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with this program; if not, write to the Free Software +* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +* +*/ + +/* +* Based on the Reverse Engineering work of Christophe Fontanel, +* maintainer of the Dungeon Master Encyclopaedia (http://dmweb.free.fr/) +*/ + +#ifndef DM_LZW_H +#define DM_LZW_H + +#include "common/file.h" + +#include "dm/dm.h" + +namespace Common { + class MemoryReadStream; +} + +namespace DM { +class LZWdecompressor { + bool _repetitionEnabled; + int16 _codeBitCount; + int16 _currentMaximumCode; + int16 _absoluteMaximumCode; + byte _inputBuffer[12]; + int16 _dictNextAvailableCode; + bool _dictFlushed; + + byte _leastSignificantBitmasks[9]; + int16 _inputBufferBitIndex; + int16 _inputBufferBitCount; + int16 _charToRepeat; + + byte *_tempBuffer; + int16 *_prefixCode; + byte *_appendCharacter; + + int16 getNextInputCode(Common::MemoryReadStream &stream, int32 *inputByteCount); + void outputCharacter(byte character, byte **out); + void operator=(const LZWdecompressor&); // deleted +public: + LZWdecompressor(); + ~LZWdecompressor(); + int32 decompress(Common::MemoryReadStream &inputStream, int32 inputByteCount, byte *out); +}; + +} + +#endif |