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/*
Copyright (C) 2010-2012 Nokia Corporation and/or its subsidiary(-ies)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef TiledBackingStore_h
#define TiledBackingStore_h
#if USE(TILED_BACKING_STORE)
#include "FloatPoint.h"
#include "IntPoint.h"
#include "IntRect.h"
#include "Tile.h"
#include "TiledBackingStoreBackend.h"
#include "Timer.h"
#include <wtf/Assertions.h>
#include <wtf/HashMap.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class GraphicsContext;
class TiledBackingStore;
class TiledBackingStoreClient;
class TiledBackingStore {
WTF_MAKE_NONCOPYABLE(TiledBackingStore); WTF_MAKE_FAST_ALLOCATED;
public:
TiledBackingStore(TiledBackingStoreClient*, PassOwnPtr<TiledBackingStoreBackend> = TiledBackingStoreBackend::create());
~TiledBackingStore();
TiledBackingStoreClient* client() { return m_client; }
// Used when class methods cannot be called asynchronously by client.
// Updates of tiles are committed as soon as all the events in event queue have been processed.
void setCommitTileUpdatesOnIdleEventLoop(bool enable) { m_commitTileUpdatesOnIdleEventLoop = enable; }
void setTrajectoryVector(const FloatPoint&);
void coverWithTilesIfNeeded();
float contentsScale() { return m_contentsScale; }
void setContentsScale(float);
bool contentsFrozen() const { return m_contentsFrozen; }
void setContentsFrozen(bool);
void updateTileBuffers();
void invalidate(const IntRect& dirtyRect);
void paint(GraphicsContext*, const IntRect&);
IntSize tileSize() { return m_tileSize; }
void setTileSize(const IntSize&);
IntRect mapToContents(const IntRect&) const;
IntRect mapFromContents(const IntRect&) const;
IntRect tileRectForCoordinate(const Tile::Coordinate&) const;
Tile::Coordinate tileCoordinateForPoint(const IntPoint&) const;
double tileDistance(const IntRect& viewport, const Tile::Coordinate&) const;
IntRect coverRect() const { return m_coverRect; }
bool visibleAreaIsCovered() const;
void removeAllNonVisibleTiles();
void setSupportsAlpha(bool);
private:
void startTileBufferUpdateTimer();
void startBackingStoreUpdateTimer(double = 0);
void tileBufferUpdateTimerFired(Timer<TiledBackingStore>*);
void backingStoreUpdateTimerFired(Timer<TiledBackingStore>*);
void createTiles();
void computeCoverAndKeepRect(const IntRect& visibleRect, IntRect& coverRect, IntRect& keepRect) const;
bool isBackingStoreUpdatesSuspended() const;
bool isTileBufferUpdatesSuspended() const;
void commitScaleChange();
bool resizeEdgeTiles();
void setCoverRect(const IntRect& rect) { m_coverRect = rect; }
void setKeepRect(const IntRect&);
PassRefPtr<Tile> tileAt(const Tile::Coordinate&) const;
void setTile(const Tile::Coordinate& coordinate, PassRefPtr<Tile> tile);
void removeTile(const Tile::Coordinate& coordinate);
IntRect visibleRect() const;
float coverageRatio(const IntRect&) const;
void adjustForContentsRect(IntRect&) const;
void paintCheckerPattern(GraphicsContext*, const IntRect&, const Tile::Coordinate&);
private:
TiledBackingStoreClient* m_client;
OwnPtr<TiledBackingStoreBackend> m_backend;
typedef HashMap<Tile::Coordinate, RefPtr<Tile> > TileMap;
TileMap m_tiles;
Timer<TiledBackingStore> m_tileBufferUpdateTimer;
Timer<TiledBackingStore> m_backingStoreUpdateTimer;
IntSize m_tileSize;
float m_coverAreaMultiplier;
FloatPoint m_trajectoryVector;
FloatPoint m_pendingTrajectoryVector;
IntRect m_visibleRect;
IntRect m_coverRect;
IntRect m_keepRect;
IntRect m_rect;
float m_contentsScale;
float m_pendingScale;
bool m_commitTileUpdatesOnIdleEventLoop;
bool m_contentsFrozen;
bool m_supportsAlpha;
bool m_pendingTileCreation;
friend class Tile;
};
}
#endif
#endif
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