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// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_TILED_LAYER_H_
#define CC_TILED_LAYER_H_
#include "cc/cc_export.h"
#include "cc/contents_scaling_layer.h"
#include "cc/layer_tiling_data.h"
namespace cc {
class LayerUpdater;
class PrioritizedResourceManager;
class PrioritizedResource;
class UpdatableTile;
class CC_EXPORT TiledLayer : public ContentsScalingLayer {
public:
enum TilingOption { AlwaysTile, NeverTile, AutoTile };
virtual void setIsMask(bool) OVERRIDE;
virtual void pushPropertiesTo(LayerImpl*) OVERRIDE;
virtual bool blocksPendingCommit() const OVERRIDE;
virtual bool drawsContent() const OVERRIDE;
virtual void setNeedsDisplayRect(const gfx::RectF&) OVERRIDE;
virtual void setLayerTreeHost(LayerTreeHost*) OVERRIDE;
virtual void setTexturePriorities(const PriorityCalculator&) OVERRIDE;
virtual Region visibleContentOpaqueRegion() const OVERRIDE;
virtual void update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats*) OVERRIDE;
protected:
TiledLayer();
virtual ~TiledLayer();
void updateTileSizeAndTilingOption();
void updateBounds();
// Exposed to subclasses for testing.
void setTileSize(const gfx::Size&);
void setTextureFormat(unsigned textureFormat) { m_textureFormat = textureFormat; }
void setBorderTexelOption(LayerTilingData::BorderTexelOption);
size_t numPaintedTiles() { return m_tiler->tiles().size(); }
virtual LayerUpdater* updater() const = 0;
virtual void createUpdaterIfNeeded() = 0;
// Set invalidations to be potentially repainted during update().
void invalidateContentRect(const gfx::Rect& contentRect);
// Reset state on tiles that will be used for updating the layer.
void resetUpdateState();
// After preparing an update, returns true if more painting is needed.
bool needsIdlePaint();
gfx::Rect idlePaintRect();
bool skipsDraw() const { return m_skipsDraw; }
// Virtual for testing
virtual PrioritizedResourceManager* resourceManager() const;
const LayerTilingData* tilerForTesting() const { return m_tiler.get(); }
const PrioritizedResource* resourceAtForTesting(int, int) const;
private:
virtual scoped_ptr<LayerImpl> createLayerImpl(LayerTreeImpl* treeImpl) OVERRIDE;
void createTilerIfNeeded();
void setTilingOption(TilingOption);
bool tileOnlyNeedsPartialUpdate(UpdatableTile*);
bool tileNeedsBufferedUpdate(UpdatableTile*);
void markOcclusionsAndRequestTextures(int left, int top, int right, int bottom, const OcclusionTracker*);
bool updateTiles(int left, int top, int right, int bottom, ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats*, bool& didPaint);
bool haveTexturesForTiles(int left, int top, int right, int bottom, bool ignoreOcclusions);
gfx::Rect markTilesForUpdate(int left, int top, int right, int bottom, bool ignoreOcclusions);
void updateTileTextures(const gfx::Rect& paintRect, int left, int top, int right, int bottom, ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats*);
void updateScrollPrediction();
UpdatableTile* tileAt(int, int) const;
UpdatableTile* createTile(int, int);
bool isSmallAnimatedLayer() const;
unsigned m_textureFormat;
bool m_skipsDraw;
bool m_failedUpdate;
// Used for predictive painting.
gfx::Vector2d m_predictedScroll;
gfx::Rect m_predictedVisibleRect;
gfx::Rect m_previousVisibleRect;
gfx::Size m_previousContentBounds;
TilingOption m_tilingOption;
scoped_ptr<LayerTilingData> m_tiler;
};
}
#endif // CC_TILED_LAYER_H_
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