StackedTile.h

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//
// This file is part of the Marble Virtual Globe.
//
// This program is free software licensed under the GNU LGPL. You can
// find a copy of this license in LICENSE.txt in the top directory of
// the source code.
//
// Copyright 2007-2010  Torsten Rahn <tackat@kde.org>
// Copyright 2007       Inge Wallin  <ingwa@kde.org>
// Copyright 2010       Jens-Michael Hoffmann <jensmh@gmx.de>
// Copyright 2010-2013 Bernhard Beschow <bbeschow@cs.tu-berlin.de>
//

#ifndef MARBLE_STACKEDTILE_H
#define MARBLE_STACKEDTILE_H

#include <QSharedPointer>
#include <QVector>
#include <QColor>
#include <QImage>

#include "Tile.h"

namespace Marble
{

class TextureTile;

class StackedTile : public Tile
{
 public:
    explicit StackedTile( TileId const &id, QImage const &resultImage, QVector<QSharedPointer<TextureTile> > const &tiles );
    virtual ~StackedTile();

    void setUsed( bool used );
    bool used() const;

    int depth() const;
    int byteCount() const;

    QVector<QSharedPointer<TextureTile> > tiles() const;

    QImage const * resultImage() const;

    uint pixel( int x, int y ) const;
    
    uint pixelF( qreal x, qreal y ) const;
    // This method passes the top left pixel (if known already) for better performance
    uint pixelF( qreal x, qreal y, const QRgb& pixel ) const; 

 private:
    Q_DISABLE_COPY( StackedTile )

    const QImage m_resultImage;
    const int m_depth;
    const bool m_isGrayscale;
    const QVector<QSharedPointer<TextureTile> > m_tiles;
    const uchar **const jumpTable8;
    const uint **const jumpTable32;
    const int m_byteCount;
    bool m_isUsed;

    static int calcByteCount( const QImage &resultImage, const QVector<QSharedPointer<TextureTile> > &tiles );
};

}

#endif