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/* 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.
*
*/
#ifndef LURE_DECODE_H
#define LURE_DECODE_H
#include "lure/luredefs.h"
#include "lure/memory.h"
namespace Lure {
class PictureDecoder {
private:
MemoryBlock *dataIn;
uint32 BP;
uint32 dataPos, dataPos2;
uint32 outputOffset;
byte AL, AH;
byte CH, CL;
void writeByte(MemoryBlock *dest, byte v);
void writeBytes(MemoryBlock *dest, byte v, uint16 numBytes);
byte DSSI(bool incr = true);
byte ESBX(bool incr = true);
void decrCtr();
bool shlCarry();
public:
MemoryBlock *decode(MemoryBlock *src, uint32 maxOutputSize = SCREEN_SIZE + 1);
MemoryBlock *egaDecode(MemoryBlock *src, uint32 maxOutputSize);
MemoryBlock *vgaDecode(MemoryBlock *src, uint32 maxOutputSize);
};
class AnimationDecoder {
public:
static void rcl(uint16 &value, bool &carry);
static uint32 decode_data(MemoryBlock *src, MemoryBlock *dest, uint32 srcPos);
static void decode_data_2(MemoryBlock *src, byte *&pSrc, uint16 &currData,
uint16 &bitCtr, uint16 &dx, bool &carry);
};
} // End of namespace Lure
#endif
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