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/*
* 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; 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., 675 mass ave, cambridge, ma 02139, usa.
*/
#ifndef KIS_TILED_RANDOM_ACCESSOR_H
#define KIS_TILED_RANDOM_ACCESSOR_H
#include <tqrect.h>
#include <tqvaluelist.h>
#include <ksharedptr.h>
#include <kis_tileddatamanager.h>
class KisTile;
class KisTiledRandomAccessor : public KShared {
struct KisTileInfo {
KisTile* tile;
KisTile* oldtile;
TQ_UINT8* data;
const TQ_UINT8* oldData;
TQ_INT32 area_x1, area_y1, area_x2, area_y2;
};
public:
KisTiledRandomAccessor(KisTiledDataManager *ktm, TQ_INT32 x, TQ_INT32 y, bool writable);
~KisTiledRandomAccessor();
private:
inline TQ_UINT32 xToCol(TQ_UINT32 x) const { if (m_ktm) return m_ktm->xToCol(x); else return 0; };
inline TQ_UINT32 yToRow(TQ_UINT32 y) const { if (m_ktm) return m_ktm->yToRow(y); else return 0; };
KisTileInfo* fetchTileData(TQ_INT32 col, TQ_INT32 row);
public:
/// Move to a given x,y position, fetch tiles and data
void moveTo(TQ_INT32 x, TQ_INT32 y);
TQ_UINT8* rawData() const;
const TQ_UINT8* oldRawData() const;
private:
KisTiledDataManager *m_ktm;
KisTileInfo** m_tilesCache;
TQ_UINT32 m_tilesCacheSize;
TQ_INT32 m_pixelSize;
TQ_UINT8* m_data;
const TQ_UINT8* m_oldData;
bool m_writable;
static const TQ_UINT32 CACHESIZE; // Define the number of tiles we keep in cache
};
#endif
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