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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_BITMAP_CONTENT_LAYER_UPDATER_H_
#define CC_BITMAP_CONTENT_LAYER_UPDATER_H_
#include "cc/cc_export.h"
#include "cc/content_layer_updater.h"
class SkCanvas;
namespace cc {
class LayerPainter;
// This class rasterizes the contentRect into a skia bitmap canvas. It then updates
// textures by copying from the canvas into the texture, using MapSubImage if
// possible.
class CC_EXPORT BitmapContentLayerUpdater : public ContentLayerUpdater {
public:
class Resource : public LayerUpdater::Resource {
public:
Resource(BitmapContentLayerUpdater*, scoped_ptr<PrioritizedResource>);
virtual ~Resource();
virtual void update(ResourceUpdateQueue&, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&) OVERRIDE;
private:
BitmapContentLayerUpdater* updater() { return m_updater; }
BitmapContentLayerUpdater* m_updater;
};
static scoped_refptr<BitmapContentLayerUpdater> create(scoped_ptr<LayerPainter>);
virtual scoped_ptr<LayerUpdater::Resource> createResource(PrioritizedResourceManager*) OVERRIDE;
virtual void prepareToUpdate(const gfx::Rect& contentRect, const gfx::Size& tileSize, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats&) OVERRIDE;
void updateTexture(ResourceUpdateQueue&, PrioritizedResource*, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate);
virtual void setOpaque(bool) OVERRIDE;
protected:
explicit BitmapContentLayerUpdater(scoped_ptr<LayerPainter>);
virtual ~BitmapContentLayerUpdater();
scoped_ptr<SkCanvas> m_canvas;
gfx::Size m_canvasSize;
bool m_opaque;
};
} // namespace cc
#endif // CC_BITMAP_CONTENT_LAYER_UPDATER_H_
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