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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 MOHAWK_BITMAP_H
#define MOHAWK_BITMAP_H
#include "mohawk/graphics.h"
#include "common/scummsys.h"
#include "common/stream.h"
#include "common/array.h"
#include "graphics/surface.h"
namespace Mohawk {
class MohawkSurface;
enum BitmapFormat {
kBitsPerPixel1 = 0x0000,
kBitsPerPixel4 = 0x0001,
kBitsPerPixel8 = 0x0002,
kBitsPerPixel16 = 0x0003,
kBitsPerPixel24 = 0x0004,
kBitsPerPixelMask = 0x0007,
kBitmapHasCLUT = 0x0008,
kDrawMASK = 0x00f0,
kDrawRaw = 0x0000,
kDrawRLE8 = 0x0010,
kDrawMSRLE8 = 0x0020,
kDrawRLE = 0x0030,
kPackMASK = 0x0f00,
kPackNone = 0x0000,
kPackLZ = 0x0100,
kPackLZ1 = 0x0200,
kPackRiven = 0x0400,
kPackXDec = 0x0f00,
kFlagMASK = 0xf000,
kFlag16_80X86 = 0x1000, // 16 bit pixel data has been converted to 80X86 format
kFlag24_MAC = 0x1000 // 24 bit pixel data has been converted to MAC 32 bit format
};
enum OldBitmapFormat {
kOldPackLZ = 0x0020,
kOldDrawRLE8 = 0x0100
};
struct BitmapHeader {
uint16 width;
uint16 height;
int16 bytesPerRow;
uint16 format;
struct ColorTable {
uint16 tableSize;
byte rgbBits;
byte colorCount;
byte* palette; // In 8bpp only
} colorTable;
};
class MohawkBitmap {
public:
MohawkBitmap();
virtual ~MohawkBitmap();
virtual MohawkSurface *decodeImage(Common::SeekableReadStream *stream);
Common::Array<MohawkSurface *> decodeImages(Common::SeekableReadStream *stream);
protected:
BitmapHeader _header;
virtual byte getBitsPerPixel();
void decodeImageData(Common::SeekableReadStream *stream);
// The actual LZ decoder
static Common::SeekableReadStream *decompressLZ(Common::SeekableReadStream *stream, uint32 uncompressedSize);
// The current data stream
Common::SeekableReadStream *_data;
// Create the output surface
Graphics::Surface *createSurface(uint16 width, uint16 height);
// Draw Functions
void drawRLE8(Graphics::Surface *surface, bool isLE);
void drawRaw(Graphics::Surface *surface);
void drawRLE8(Graphics::Surface *surface) { return drawRLE8(surface, false); }
private:
// Unpack Functions
void unpackRaw();
void unpackLZ();
void unpackRiven();
// An unpacker
struct PackFunction {
uint16 flag;
const char *name;
void (MohawkBitmap::*func)();
};
// A drawer
struct DrawFunction {
uint16 flag;
const char *name;
void (MohawkBitmap::*func)(Graphics::Surface *surface);
};
// Unpack/Draw maps
const PackFunction *_packTable;
int _packTableSize;
const DrawFunction *_drawTable;
int _drawTableSize;
// Unpack/Draw helpers
const char *getPackName();
void unpackImage();
const char *getDrawName();
void drawImage(Graphics::Surface *surface);
// Riven Decoding
void handleRivenSubcommandStream(byte count, byte *&dst);
};
#ifdef ENABLE_MYST
// Myst uses a different image format than that of other Mohawk games.
// It essentially uses a Windows bitmap with the LZ encoding from the
// Mohawk Bitmap format.
class MystBitmap : public MohawkBitmap {
public:
MystBitmap() : MohawkBitmap() {}
~MystBitmap() {}
MohawkSurface *decodeImage(Common::SeekableReadStream *stream);
protected:
byte getBitsPerPixel() { return _bitsPerPixel; }
private:
uint16 _bitsPerPixel;
};
#endif
class LivingBooksBitmap_v1 : public MohawkBitmap {
public:
LivingBooksBitmap_v1() : MohawkBitmap() {}
~LivingBooksBitmap_v1() {}
MohawkSurface *decodeImage(Common::SeekableReadStream *stream);
protected:
byte getBitsPerPixel() { return 8; }
};
class DOSBitmap : public MohawkBitmap {
public:
DOSBitmap() : MohawkBitmap() {}
~DOSBitmap() {}
MohawkSurface *decodeImage(Common::SeekableReadStream *stream);
protected:
byte getBitsPerPixel() { return ((_header.format & 0x30) >> 4) + 1; }
private:
void expandMonochromePlane(Graphics::Surface *surface, Common::SeekableReadStream *rawStream);
void expandEGAPlanes(Graphics::Surface *surface, Common::SeekableReadStream *rawStream);
};
} // End of namespace Mohawk
#endif
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