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/*
* Copyright (c) 2004 Casper Boemann <cbr@boemann.dk>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef KIS_TILE_H_
#define KIS_TILE_H_
#include <tqglobal.h>
#include <tqrect.h>
class KisTiledDataManager;
class KisTiledIterator;
/**
* Provides abstraction to a tile. A tile tqcontains
* a part of a PaintDevice, but only the individual pixels
* are accesable and that only via iterators.
*/
class KisTile {
public:
KisTile(TQ_INT32 pixelSize, TQ_INT32 col, TQ_INT32 row, const TQ_UINT8 *defPixel);
KisTile(const KisTile& rhs, TQ_INT32 col, TQ_INT32 row);
KisTile(const KisTile& rhs);
~KisTile();
public:
void release();
void allocate();
TQ_UINT8 *data(TQ_INT32 xoff, TQ_INT32 yoff) const;
TQ_UINT8 *data() const { return m_data; }
void setData(const TQ_UINT8 *pixel);
TQ_INT32 refCount() const;
void ref();
TQ_INT32 getRow() const { return m_row; }
TQ_INT32 getCol() const { return m_col; }
TQRect extent() const { return TQRect(m_col * WIDTH, m_row * HEIGHT, WIDTH, HEIGHT); }
void setNext(KisTile *);
KisTile *getNext() const { return m_nextTile; }
// These are const because they don't change the external data the tile represents,
// although they do change internal representations. We need to be able to request
// access to a tile in a const enviroment (like copyconstructor and so)!
void addReader() const;
void removeReader() const;
TQ_INT32 readers() { return m_nReadlock; }
friend class KisTiledIterator;
friend class KisTiledDataManager;
friend class KisMemento;
friend class KisTileManager;
private:
KisTile& operator=(const KisTile&);
private:
TQ_UINT8 *m_data;
mutable TQ_INT32 m_nReadlock;
TQ_INT32 m_row;
TQ_INT32 m_col;
TQ_INT32 m_pixelSize;
KisTile *m_nextTile;
public:
static const TQ_INT32 WIDTH;
static const TQ_INT32 HEIGHT;
};
#endif // KIS_TILE_H_
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