pict.h

/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef IMAGE_PICT_H
#define IMAGE_PICT_H

#include "common/array.h"
#include "common/rect.h"
#include "common/scummsys.h"

#include "image/image_decoder.h"

namespace Common {
class SeekableReadStream;
}

namespace Graphics {
struct Surface;
}

namespace Image {

#define DECLARE_OPCODE(x) void x(Common::SeekableReadStream &stream)

class PICTDecoder : public ImageDecoder {
public:
    PICTDecoder();
    ~PICTDecoder();

    // ImageDecoder API
    bool loadStream(Common::SeekableReadStream &stream);
    void destroy();
    const Graphics::Surface *getSurface() const { return _outputSurface; }
    const byte *getPalette() const { return _palette; }
    int getPaletteSize() const { return 256; }
    uint16 getPaletteColorCount() const { return _paletteColorCount; }

    struct PixMap {
        uint32 baseAddr;
        uint16 rowBytes;
        Common::Rect bounds;
        uint16 pmVersion;
        uint16 packType;
        uint32 packSize;
        uint32 hRes;
        uint32 vRes;
        uint16 pixelType;
        uint16 pixelSize;
        uint16 cmpCount;
        uint16 cmpSize;
        uint32 planeBytes;
        uint32 pmTable;
        uint32 pmReserved;
    };

    static PixMap readRowBytes(Common::SeekableReadStream &stream, bool hasBaseAddr = true);
    static PixMap readPixMap(Common::SeekableReadStream &stream, bool hasBaseAddr = true, bool hasRowBytes = true);

private:
    Common::Rect _imageRect;
    byte _palette[256 * 3];
    uint16 _paletteColorCount;
    Graphics::Surface *_outputSurface;
    bool _continueParsing;
    int _version;

    // Utility Functions
    void unpackBitsRectOrRgn(Common::SeekableReadStream &stream, bool hasPackBits);
    void unpackBitsRgn(Common::SeekableReadStream &stream, bool compressed);
    void unpackBitsRect(Common::SeekableReadStream &stream, bool withPalette, PixMap pixMap);
    void unpackBitsLine(byte *out, uint32 length, Common::SeekableReadStream *stream, byte bitsPerPixel, byte bytesPerPixel);
    void skipBitsRect(Common::SeekableReadStream &stream, bool withPalette);
    void decodeCompressedQuickTime(Common::SeekableReadStream &stream);
    void outputPixelBuffer(byte *&out, byte value, byte bitsPerPixel);

    // Opcodes
    typedef void (PICTDecoder::*OpcodeProcPICT)(Common::SeekableReadStream &stream);
    struct PICTOpcode {
        PICTOpcode() { op = 0; proc = 0; desc = 0; }
        PICTOpcode(uint16 o, OpcodeProcPICT p, const char *d) { op = o; proc = p; desc = d; }
        uint16 op;
        OpcodeProcPICT proc;
        const char *desc;
    };
    Common::Array<PICTOpcode> _opcodes;

    // Common Opcodes
    void setupOpcodesCommon();
    DECLARE_OPCODE(o_nop);
    DECLARE_OPCODE(o_clip);
    DECLARE_OPCODE(o_txFont);
    DECLARE_OPCODE(o_txFace);
    DECLARE_OPCODE(o_pnSize);
    DECLARE_OPCODE(o_txSize);
    DECLARE_OPCODE(o_txRatio);
    DECLARE_OPCODE(o_versionOp);
    DECLARE_OPCODE(o_longText);
    DECLARE_OPCODE(o_bitsRgn);
    DECLARE_OPCODE(o_packBitsRgn);
    DECLARE_OPCODE(o_shortComment);
    DECLARE_OPCODE(o_longComment);
    DECLARE_OPCODE(o_opEndPic);
    DECLARE_OPCODE(o_headerOp);
    DECLARE_OPCODE(o_versionOp1);

    // Regular-mode Opcodes
    void setupOpcodesNormal();
    DECLARE_OPCODE(on_bitsRect);
    DECLARE_OPCODE(on_packBitsRect);
    DECLARE_OPCODE(on_directBitsRect);
    DECLARE_OPCODE(on_compressedQuickTime);

    // QuickTime-mode Opcodes
    void setupOpcodesQuickTime();
    DECLARE_OPCODE(oq_packBitsRect);
    DECLARE_OPCODE(oq_directBitsRect);
    DECLARE_OPCODE(oq_compressedQuickTime);
};

#undef DECLARE_OPCODE

} // End of namespace Image

#endif