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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_SKPICTURE_CONTENT_LAYER_UPDATER_H_
#define CC_SKPICTURE_CONTENT_LAYER_UPDATER_H_
#include "cc/content_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 BitmapSkPictureContentLayerUpdater and
// FrameBufferSkPictureContentLayerUpdater are two examples of such
// implementations.
class SkPictureContentLayerUpdater : public ContentLayerUpdater {
public:
class Resource : public LayerUpdater::Resource {
public:
Resource(SkPictureContentLayerUpdater*, scoped_ptr<PrioritizedResource>);
virtual ~Resource();
virtual void update(ResourceUpdateQueue&, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&) OVERRIDE;
private:
SkPictureContentLayerUpdater* updater() { return m_updater; }
SkPictureContentLayerUpdater* m_updater;
};
static scoped_refptr<SkPictureContentLayerUpdater> create(scoped_ptr<LayerPainter>);
virtual scoped_ptr<LayerUpdater::Resource> createResource(PrioritizedResourceManager*) OVERRIDE;
virtual void setOpaque(bool) OVERRIDE;
protected:
explicit SkPictureContentLayerUpdater(scoped_ptr<LayerPainter>);
virtual ~SkPictureContentLayerUpdater();
virtual void prepareToUpdate(const gfx::Rect& contentRect, const gfx::Size& tileSize, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats&) OVERRIDE;
void drawPicture(SkCanvas*);
void updateTexture(ResourceUpdateQueue& queue, PrioritizedResource* texture, const gfx::Rect& sourceRect, const gfx::Vector2d& 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 // CC_SKPICTURE_CONTENT_LAYER_UPDATER_H_
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