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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 CC_SCROLLBAR_LAYER_H_
#define CC_SCROLLBAR_LAYER_H_
#include "cc/caching_bitmap_content_layer_updater.h"
#include "cc/cc_export.h"
#include "cc/contents_scaling_layer.h"
#include <public/WebScrollbar.h>
#include <public/WebScrollbarThemeGeometry.h>
#include <public/WebScrollbarThemePainter.h>
namespace cc {
class ResourceUpdateQueue;
class Scrollbar;
class ScrollbarThemeComposite;
class CC_EXPORT ScrollbarLayer : public ContentsScalingLayer {
public:
virtual scoped_ptr<LayerImpl> createLayerImpl() OVERRIDE;
static scoped_refptr<ScrollbarLayer> create(scoped_ptr<WebKit::WebScrollbar>, WebKit::WebScrollbarThemePainter, scoped_ptr<WebKit::WebScrollbarThemeGeometry>, int scrollLayerId);
// Layer interface
virtual void setTexturePriorities(const PriorityCalculator&) OVERRIDE;
virtual void update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats&) OVERRIDE;
virtual void setLayerTreeHost(LayerTreeHost*) OVERRIDE;
virtual void pushPropertiesTo(LayerImpl*) OVERRIDE;
int scrollLayerId() const { return m_scrollLayerId; }
void setScrollLayerId(int id) { m_scrollLayerId = id; }
virtual ScrollbarLayer* toScrollbarLayer() OVERRIDE;
protected:
ScrollbarLayer(scoped_ptr<WebKit::WebScrollbar>, WebKit::WebScrollbarThemePainter, scoped_ptr<WebKit::WebScrollbarThemeGeometry>, int scrollLayerId);
virtual ~ScrollbarLayer();
private:
void updatePart(CachingBitmapContentLayerUpdater*, LayerUpdater::Resource*, const gfx::Rect&, ResourceUpdateQueue&, RenderingStats&);
void createUpdaterIfNeeded();
gfx::Rect scrollbarLayerRectToContentRect(const gfx::Rect& layerRect) const;
scoped_ptr<WebKit::WebScrollbar> m_scrollbar;
WebKit::WebScrollbarThemePainter m_painter;
scoped_ptr<WebKit::WebScrollbarThemeGeometry> m_geometry;
int m_scrollLayerId;
GLenum m_textureFormat;
scoped_refptr<CachingBitmapContentLayerUpdater> m_backTrackUpdater;
scoped_refptr<CachingBitmapContentLayerUpdater> m_foreTrackUpdater;
scoped_refptr<CachingBitmapContentLayerUpdater> m_thumbUpdater;
// All the parts of the scrollbar except the thumb
scoped_ptr<LayerUpdater::Resource> m_backTrack;
scoped_ptr<LayerUpdater::Resource> m_foreTrack;
scoped_ptr<LayerUpdater::Resource> m_thumb;
};
}
#endif // CC_SCROLLBAR_LAYER_H_
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