TiledBackingStore.h [plain text]
#ifndef TiledBackingStore_h
#define TiledBackingStore_h
#if USE(COORDINATED_GRAPHICS)
#include "FloatPoint.h"
#include "IntPoint.h"
#include "IntRect.h"
#include "Tile.h"
#include "Timer.h"
#include <wtf/Assertions.h>
#include <wtf/HashMap.h>
namespace WebCore {
class GraphicsContext;
class TiledBackingStoreClient;
class TiledBackingStore {
WTF_MAKE_NONCOPYABLE(TiledBackingStore); WTF_MAKE_FAST_ALLOCATED;
public:
TiledBackingStore(TiledBackingStoreClient*, float contentsScale = 1.f);
~TiledBackingStore();
TiledBackingStoreClient* client() { return m_client; }
void setTrajectoryVector(const FloatPoint&);
void createTilesIfNeeded(const IntRect& unscaledVisibleRect, const IntRect& contentsRect);
float contentsScale() { return m_contentsScale; }
void updateTileBuffers();
void invalidate(const IntRect& dirtyRect);
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(const IntRect& unscaledVisibleRect, const IntRect& contentsRect);
void setSupportsAlpha(bool);
private:
void createTiles(const IntRect& visibleRect, const IntRect& scaledContentsRect);
void computeCoverAndKeepRect(const IntRect& visibleRect, IntRect& coverRect, IntRect& keepRect) const;
bool resizeEdgeTiles();
void setCoverRect(const IntRect& rect) { m_coverRect = rect; }
void setKeepRect(const IntRect&);
float coverageRatio(const IntRect&) const;
void adjustForContentsRect(IntRect&) const;
void paintCheckerPattern(GraphicsContext*, const IntRect&, const Tile::Coordinate&);
private:
TiledBackingStoreClient* m_client;
typedef HashMap<Tile::Coordinate, std::unique_ptr<Tile>> TileMap;
TileMap m_tiles;
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;
bool m_supportsAlpha;
bool m_pendingTileCreation;
friend class Tile;
};
}
#endif
#endif