kis_random_accessor.h

/*
 * This file is part of the Chalk project
 *
 *  Copyright (c) 2006 Cyrille Berger <cberger@cberger.net>
 *
 *  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; version 2 of the License.
 *
 *  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 KIS_RANDOM_ACCESSOR_H
#define KIS_RANDOM_ACCESSOR_H
 
#include <ksharedptr.h>
 
#include <kis_global.h>
 
class KisTiledRandomAccessor;
typedef TDESharedPtr<KisTiledRandomAccessor> KisTiledRandomAccessorSP;
 
class KisTiledDataManager;
 
class KisRandomAccessor{
    public:
        KisRandomAccessor(KisTiledDataManager *ktm, TQ_INT32 x, TQ_INT32 y, TQ_INT32 offsetx, TQ_INT32 offsety, bool writable);
        KisRandomAccessor(const KisRandomAccessor& rhs);
        ~KisRandomAccessor();
    public:
        void moveTo(TQ_INT32 x, TQ_INT32 y);
        TQ_UINT8* rawData() const;
        const TQ_UINT8* oldRawData() const;
    private:
        KisTiledRandomAccessorSP m_accessor;
        TQ_INT32 m_offsetx, m_offsety;
};
 
class KisRandomAccessorPixelTrait {
    public:
        inline KisRandomAccessorPixelTrait(KisRandomAccessor* underlyingAccessor, KisRandomAccessor* selectionAccessor) : m_underlyingAccessor(underlyingAccessor), m_selectionAccessor(selectionAccessor)
        {
        }
    ~KisRandomAccessorPixelTrait() {
        if(m_selectionAccessor)
            delete m_selectionAccessor;
    }
        inline bool isSelected() const
        {
            return (m_selectionAccessor) ? *(m_selectionAccessor->rawData()) > SELECTION_THRESHOLD : true;
        };
        inline TQ_UINT8 operator[](int index) const
        { return m_underlyingAccessor->rawData()[index]; };
        inline TQ_UINT8 selectedness() const
        {
            return (m_selectionAccessor) ? *(m_selectionAccessor->rawData()) : MAX_SELECTED;
        };

        inline TQ_UINT8 * selectionMask() const
        {
            return ( m_selectionAccessor ) ? m_selectionAccessor->rawData() : 0;
        }
 
        inline void moveTo(TQ_INT32 x, TQ_INT32 y) { if(m_selectionAccessor) m_selectionAccessor->moveTo(x,y); }
        
    private:
        KisRandomAccessor* m_underlyingAccessor;
        KisRandomAccessor* m_selectionAccessor;
};
 
class KisRandomAccessorPixel : public KisRandomAccessor, public KisRandomAccessorPixelTrait {
    public:
        KisRandomAccessorPixel(KisTiledDataManager *ktm, KisTiledDataManager *ktmselect, TQ_INT32 x, TQ_INT32 y, TQ_INT32 offsetx, TQ_INT32 offsety, bool writable);
    public:
        inline void moveTo(TQ_INT32 x, TQ_INT32 y) { KisRandomAccessor::moveTo(x,y); KisRandomAccessorPixelTrait::moveTo(x,y); }
};
 
 
#endif