image.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/>.
 *
 */

/*
 * Based on
 * WebVenture (c) 2010, Sean Kasun
 * https://github.com/mrkite/webventure, http://seancode.com/webventure/
 *
 * Used with explicit permission from the author
 */

#ifndef MACVENTURE_IMAGE_H
#define MACVENTURE_IMAGE_H

#include "macventure/macventure.h"
#include "macventure/container.h"
#include "common/bitstream.h"

namespace MacVenture {

typedef uint32 ObjID;
class Container;


enum BlitMode {
    kBlitDirect = 0,
    kBlitBIC = 1,
    kBlitOR = 2,
    kBlitXOR = 3
};

enum GraphicsEncoding {
    kPPIC0 = 0,
    kPPIC1 = 1,
    kPPIC2 = 2,
    kPPIC3 = 3
};

struct PPICHuff {
    uint16 masks[17];
    uint16 lens[17];
    uint8 symbols[17];
};

class ImageAsset {
public:
    ImageAsset(ObjID original, Container *container);
    ImageAsset(Common::SeekableReadStream *stream);
    ~ImageAsset();

    void blitInto(Graphics::ManagedSurface *target, int x, int y, BlitMode mode);

    bool isPointInside(Common::Point point);
    bool isRectInside(Common::Rect rect);

    int getWidth();
    int getHeight();

private:
    void decodePPIC(Common::SeekableReadStream *baseStream, Common::Array<byte> &data, uint &bitHeight, uint &bitWidth, uint &rowBytes);
    void decodePPIC(ObjID id, Common::Array<byte> &data, uint &bitHeight, uint &bitWidth, uint &rowBytes);

    void decodePPIC0(Common::BitStream32BEMSB &stream, Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);
    void decodePPIC1(Common::BitStream32BEMSB &stream, Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);
    void decodePPIC2(Common::BitStream32BEMSB &stream, Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);
    void decodePPIC3(Common::BitStream32BEMSB &stream, Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);

    void decodeHuffGraphic(const PPICHuff &huff, Common::BitStream32BEMSB &stream, Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);
    byte walkHuff(const PPICHuff &huff, Common::BitStream32BEMSB &stream);

    void blitDirect(Graphics::ManagedSurface *target, int ox, int oy, const Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);
    void blitBIC(Graphics::ManagedSurface *target, int ox, int oy, const Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);
    void blitOR(Graphics::ManagedSurface *target, int ox, int oy, const Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);
    void blitXOR(Graphics::ManagedSurface *target, int ox, int oy, const Common::Array<byte> &data, uint bitHeight, uint bitWidth, uint rowBytes);

    void calculateSectionToDraw(Graphics::ManagedSurface *target, int &ox, int &oy, uint bitWidth, uint bitHeight, uint &sx, uint &sy, uint &w, uint &h);
    void calculateSectionInDirection(uint targetWhole, uint originWhole, int &originPosition, uint &startPosition, uint &blittedWhole);

private:
    ObjID _id;
    ObjID _mask;
    Container *_container;

    uint16 _walkRepeat;
    uint16 _walkLast;

    Common::Array<byte> _imgData;
    uint16 _imgRowBytes;
    uint16 _imgBitWidth;
    uint16 _imgBitHeight;

    Common::Array<byte> _maskData;
    uint16 _maskRowBytes;
    uint16 _maskBitWidth;
    uint16 _maskBitHeight;
};

} // End of namespace MacVenture

#endif