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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TileCache_h
#define TileCache_h
#include "IntPointHash.h"
#include "IntRect.h"
#include "TiledBacking.h"
#include "Timer.h"
#include <wtf/HashMap.h>
#include <wtf/Noncopyable.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/RetainPtr.h>
OBJC_CLASS CALayer;
OBJC_CLASS WebTileCacheLayer;
OBJC_CLASS WebTileLayer;
namespace WebCore {
class FloatRect;
class IntPoint;
class IntRect;
typedef Vector<RetainPtr<WebTileLayer> > WebTileLayerList;
class TileCache : public TiledBacking {
WTF_MAKE_NONCOPYABLE(TileCache);
public:
static PassOwnPtr<TileCache> create(WebTileCacheLayer*);
~TileCache();
void tileCacheLayerBoundsChanged();
void setNeedsDisplay();
void setNeedsDisplayInRect(const IntRect&);
void drawLayer(WebTileLayer *, CGContextRef);
void setScale(CGFloat);
bool acceleratesDrawing() const { return m_acceleratesDrawing; }
void setAcceleratesDrawing(bool);
void setTilesOpaque(bool);
bool tilesAreOpaque() const { return m_tilesAreOpaque; }
CALayer *tileContainerLayer() const { return m_tileContainerLayer.get(); }
void setTileDebugBorderWidth(float);
void setTileDebugBorderColor(CGColorRef);
virtual IntRect visibleRect() const OVERRIDE { return m_visibleRect; }
unsigned blankPixelCount() const;
static unsigned blankPixelCountForTiles(const WebTileLayerList&, IntRect, IntPoint);
private:
TileCache(WebTileCacheLayer*);
// TiledBacking member functions.
virtual void setVisibleRect(const IntRect&) OVERRIDE;
virtual void setIsInWindow(bool) OVERRIDE;
virtual void setTileCoverage(TileCoverage) OVERRIDE;
virtual TileCoverage tileCoverage() const OVERRIDE { return m_tileCoverage; }
virtual void forceRepaint() OVERRIDE;
virtual IntSize tileSize() const OVERRIDE { return m_tileSize; }
virtual IntRect tileGridExtent() const OVERRIDE;
virtual void setScrollingPerformanceLoggingEnabled(bool flag) OVERRIDE { m_scrollingPerformanceLoggingEnabled = flag; }
virtual bool scrollingPerformanceLoggingEnabled() const OVERRIDE { return m_scrollingPerformanceLoggingEnabled; }
virtual IntRect tileCoverageRect() const OVERRIDE;
IntRect bounds() const;
typedef IntPoint TileIndex;
IntRect rectForTileIndex(const TileIndex&) const;
void getTileIndexRangeForRect(const IntRect&, TileIndex& topLeft, TileIndex& bottomRight) const;
IntRect computeTileCoverageRect() const;
IntSize tileSizeForCoverageRect(const IntRect&) const;
void scheduleTileRevalidation(double interval);
void tileRevalidationTimerFired(Timer<TileCache>*);
void revalidateTiles();
WebTileLayer* tileLayerAtIndex(const TileIndex&) const;
RetainPtr<WebTileLayer> createTileLayer(const IntRect&);
bool shouldShowRepaintCounters() const;
void drawRepaintCounter(WebTileLayer *, CGContextRef);
WebTileCacheLayer* m_tileCacheLayer;
RetainPtr<CALayer> m_tileContainerLayer;
IntSize m_tileSize;
IntRect m_visibleRect;
typedef HashMap<TileIndex, RetainPtr<WebTileLayer> > TileMap;
TileMap m_tiles;
Timer<TileCache> m_tileRevalidationTimer;
IntRect m_tileCoverageRect;
CGFloat m_scale;
CGFloat m_deviceScaleFactor;
TileCoverage m_tileCoverage;
bool m_isInWindow;
bool m_scrollingPerformanceLoggingEnabled;
bool m_acceleratesDrawing;
bool m_tilesAreOpaque;
RetainPtr<CGColorRef> m_tileDebugBorderColor;
float m_tileDebugBorderWidth;
};
} // namespace WebCore
#endif // TileCache_h
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