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// Copyright 2012 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 CACHING_BITMAP_CANVAS_LAYER_UPDATER_H_
#define CACHING_BITMAP_CANVAS_LAYER_UPDATER_H_
#include "base/compiler_specific.h"
#include "cc/bitmap_content_layer_updater.h"
namespace cc {
class CachingBitmapContentLayerUpdater
: public BitmapContentLayerUpdater {
public:
static scoped_refptr<CachingBitmapContentLayerUpdater> Create(
scoped_ptr<LayerPainter>);
virtual void prepareToUpdate(const IntRect& content_rect,
const IntSize& tile_size,
float contents_width_scale,
float contents_height_scale,
IntRect& resulting_opaque_rect,
RenderingStats&) OVERRIDE;
bool pixelsDidChange() const;
private:
explicit CachingBitmapContentLayerUpdater(
scoped_ptr<LayerPainter> painter);
virtual ~CachingBitmapContentLayerUpdater();
bool pixels_did_change_;
SkBitmap cached_bitmap_;
};
} // namespace cc
#endif // CACHING_BITMAP_CANVAS_LAYER_UPDATER_H_
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