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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.
*
* $URL$
* $Id$
*/
#ifndef GRAPHICS_IFF_H
#define GRAPHICS_IFF_H
#include "common/iff_container.h"
namespace Graphics {
struct Surface;
struct BMHD {
uint16 width, height;
uint16 x, y;
byte depth;
byte masking;
byte pack;
byte flags;
uint16 transparentColor;
byte xAspect, yAspect;
uint16 pageWidth, pageHeight;
BMHD() {
memset(this, 0, sizeof(*this));
}
};
// handles ILBM subtype of IFF FORM files
//
class ILBMDecoder : public Common::IFFParser {
protected:
void readBMHD(Common::IFFChunk &chunk);
void readCMAP(Common::IFFChunk &chunk);
void readBODY(Common::IFFChunk &chunk);
BMHD _bitmapHeader;
uint32 _colorCount;
Surface *_surface;
byte **_colors;
void fillPlane(byte *out, byte* buf, uint32 width, uint32 plane);
public:
ILBMDecoder(Common::ReadStream &input, Surface &surface, byte *&colors);
virtual ~ILBMDecoder() { }
void decode();
};
// handles PBM subtype of IFF FORM files
//
class PBMDecoder : public Common::IFFParser {
protected:
void readBMHD(Common::IFFChunk &chunk);
void readCMAP(Common::IFFChunk &chunk);
void readBODY(Common::IFFChunk &chunk);
BMHD _bitmapHeader;
uint32 _colorCount;
Surface *_surface;
byte **_colors;
public:
PBMDecoder(Common::ReadStream &input, Surface &surface, byte *&colors);
virtual ~PBMDecoder() { }
void decode();
};
void decodePBM(Common::ReadStream &input, Surface &surface, byte *&colors);
/*
PackBits is a RLE compression algorithm introduced
by Apple. It is also used to encode ILBM and PBM
subtypes of IFF files, and some flavours of TIFF.
The following implementation uses a static storage
and is buffered, that means you can't destroy the
input stream before you are done with it.
*/
class PackBitsReadStream : public Common::ReadStream {
protected:
Common::ReadStream *_input;
byte _storage[257];
byte *_wStoragePos;
byte *_rStoragePos;
byte* _out;
byte* _outEnd;
int32 _fed;
int32 _unpacked;
void store(byte b);
void feed();
void unpack();
public:
PackBitsReadStream(Common::ReadStream &input);
~PackBitsReadStream();
virtual bool eos() const;
uint32 read(void *dataPtr, uint32 dataSize);
};
}
#endif
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