animationdecoder.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 MUTATIONOFJB_ANIMATIONDECODER_H
#define MUTATIONOFJB_ANIMATIONDECODER_H

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

#include "graphics/surface.h"
#include "mutationofjb/encryptedfile.h"

namespace Common {
class SeekableReadStream;
}

namespace MutationOfJB {

enum {
    PALETTE_COLORS = 256,
    PALETTE_SIZE = PALETTE_COLORS * 3,
    IMAGE_WIDTH = 320,
    IMAGE_HEIGHT = 200
};

class AnimationDecoderCallback {
public:
    virtual void onFrame(int frameNo, Graphics::Surface &surface) = 0;
    virtual void onPaletteUpdated(byte palette[PALETTE_SIZE]) = 0;
    virtual ~AnimationDecoderCallback() {}
};

class AnimationDecoder {
public:
    AnimationDecoder(const Common::Path &fileName);
    AnimationDecoder(const Common::Path &fileName, const Graphics::Surface &outSurface);
    ~AnimationDecoder();
    bool decode(AnimationDecoderCallback *callback);

    void setPartialMode(int fromFrame, int toFrame, const Common::Rect area = Common::Rect(), uint8 threshold = 0xFF);

private:
    void loadPalette(Common::SeekableReadStream &stream);
    void loadFullFrame(EncryptedFile &file, uint32 size);
    void loadDiffFrame(EncryptedFile &file, uint32 size);

    Common::Path _fileName;
    Graphics::Surface _surface;
    bool _owningSurface;
    byte _palette[PALETTE_SIZE];
    int _fromFrame;
    int _toFrame;
    Common::Rect _area;
    uint8 _threshold;
};

}

#endif