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// Copyright 2010 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_CONTENT_LAYER_H_
#define CC_CONTENT_LAYER_H_
#include "base/basictypes.h"
#include "cc/cc_export.h"
#include "cc/layer_painter.h"
#include "cc/tiled_layer.h"
class SkCanvas;
namespace cc {
class ContentLayerClient;
class LayerUpdater;
class CC_EXPORT ContentLayerPainter : public LayerPainter {
public:
static scoped_ptr<ContentLayerPainter> create(ContentLayerClient*);
virtual void paint(SkCanvas*, gfx::Rect contentRect, gfx::RectF& opaque) OVERRIDE;
private:
explicit ContentLayerPainter(ContentLayerClient*);
ContentLayerClient* m_client;
DISALLOW_COPY_AND_ASSIGN(ContentLayerPainter);
};
// A layer that renders its contents into an SkCanvas.
class CC_EXPORT ContentLayer : public TiledLayer {
public:
static scoped_refptr<ContentLayer> create(ContentLayerClient*);
void clearClient() { m_client = 0; }
bool useLCDText() const { return m_useLCDText; }
virtual bool drawsContent() const OVERRIDE;
virtual void setTexturePriorities(const PriorityCalculator&) OVERRIDE;
virtual void update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats&) OVERRIDE;
virtual bool needMoreUpdates() OVERRIDE;
virtual void setContentsOpaque(bool) OVERRIDE;
protected:
explicit ContentLayer(ContentLayerClient*);
virtual ~ContentLayer();
private:
virtual LayerUpdater* updater() const OVERRIDE;
virtual void createUpdaterIfNeeded() OVERRIDE;
void updateUseLCDText();
// Called when LCD text setting is about to potentially change.
// If this function returns true, the setting is allowed to change.
// If it returns false, the setting is not changed.
bool useLCDTextWillChange() const;
void useLCDTextDidChange();
ContentLayerClient* m_client;
scoped_refptr<LayerUpdater> m_updater;
bool m_useLCDText;
int m_lcdTextChangeCount;
static const int kLCDTextMaxChangeCount;
};
}
#endif // CC_CONTENT_LAYER_H_
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