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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 SkPictureCanvasLayerUpdater_h
#define SkPictureCanvasLayerUpdater_h
#include "cc/canvas_layer_updater.h"
#include "third_party/skia/include/core/SkPicture.h"
class SkCanvas;
namespace cc {
class LayerPainter;
// This class records the contentRect into an SkPicture. Subclasses, provide
// different implementations of tile updating based on this recorded picture.
// The BitmapSkPictureCanvasLayerUpdater and
// FrameBufferSkPictureCanvasLayerUpdater are two examples of such
// implementations.
class SkPictureCanvasLayerUpdater : public CanvasLayerUpdater {
public:
class Texture : public LayerUpdater::Texture {
public:
Texture(SkPictureCanvasLayerUpdater*, scoped_ptr<PrioritizedTexture>);
virtual ~Texture();
virtual void update(TextureUpdateQueue&, const IntRect& sourceRect, const IntSize& destOffset, bool partialUpdate, RenderingStats&) OVERRIDE;
private:
SkPictureCanvasLayerUpdater* updater() { return m_updater; }
SkPictureCanvasLayerUpdater* m_updater;
};
static scoped_refptr<SkPictureCanvasLayerUpdater> create(scoped_ptr<LayerPainter>);
virtual scoped_ptr<LayerUpdater::Texture> createTexture(PrioritizedTextureManager*) OVERRIDE;
virtual void setOpaque(bool) OVERRIDE;
protected:
explicit SkPictureCanvasLayerUpdater(scoped_ptr<LayerPainter>);
virtual ~SkPictureCanvasLayerUpdater();
virtual void prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, float contentsWidthScale, float contentsHeightScale, IntRect& resultingOpaqueRect, RenderingStats&) OVERRIDE;
void drawPicture(SkCanvas*);
void updateTexture(TextureUpdateQueue& queue, PrioritizedTexture* texture, const IntRect& sourceRect, const IntSize& destOffset, bool partialUpdate);
bool layerIsOpaque() const { return m_layerIsOpaque; }
private:
// Recording canvas.
SkPicture m_picture;
// True when it is known that all output pixels will be opaque.
bool m_layerIsOpaque;
};
} // namespace cc
#endif // SkPictureCanvasLayerUpdater_h
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