1 files changed, 67 insertions, 0 deletions
diff --git a/cc/scrollbar_layer.h b/cc/scrollbar_layer.h
index 638cbb2..5c7cc5c 100644
--- a/cc/scrollbar_layer.h
+++ b/cc/scrollbar_layer.h
@@ -1,3 +1,70 @@
 // 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 ScrollbarLayerChromium_h
+#define ScrollbarLayerChromium_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "LayerChromium.h"
+#include "caching_bitmap_canvas_layer_texture_updater.h"
+#include <public/WebScrollbar.h>
+#include <public/WebScrollbarThemeGeometry.h>
+#include <public/WebScrollbarThemePainter.h>
+
+namespace cc {
+
+class Scrollbar;
+class ScrollbarThemeComposite;
+class CCTextureUpdateQueue;
+
+class ScrollbarLayerChromium : public LayerChromium {
+public:
+    virtual scoped_ptr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
+
+    static scoped_refptr<ScrollbarLayerChromium> create(PassOwnPtr<WebKit::WebScrollbar>, WebKit::WebScrollbarThemePainter, PassOwnPtr<WebKit::WebScrollbarThemeGeometry>, int scrollLayerId);
+
+    // LayerChromium interface
+    virtual bool needsContentsScale() const OVERRIDE;
+    virtual IntSize contentBounds() const OVERRIDE;
+    virtual void setTexturePriorities(const CCPriorityCalculator&) OVERRIDE;
+    virtual void update(CCTextureUpdateQueue&, const CCOcclusionTracker*, CCRenderingStats&) OVERRIDE;
+    virtual void setLayerTreeHost(CCLayerTreeHost*) OVERRIDE;
+    virtual void pushPropertiesTo(CCLayerImpl*) OVERRIDE;
+
+    int scrollLayerId() const { return m_scrollLayerId; }
+    void setScrollLayerId(int id) { m_scrollLayerId = id; }
+
+    virtual ScrollbarLayerChromium* toScrollbarLayerChromium() OVERRIDE;
+
+protected:
+    ScrollbarLayerChromium(PassOwnPtr<WebKit::WebScrollbar>, WebKit::WebScrollbarThemePainter, PassOwnPtr<WebKit::WebScrollbarThemeGeometry>, int scrollLayerId);
+    virtual ~ScrollbarLayerChromium();
+
+private:
+    void updatePart(CachingBitmapCanvasLayerTextureUpdater*, LayerTextureUpdater::Texture*, const IntRect&, CCTextureUpdateQueue&, CCRenderingStats&);
+    void createTextureUpdaterIfNeeded();
+
+    OwnPtr<WebKit::WebScrollbar> m_scrollbar;
+    WebKit::WebScrollbarThemePainter m_painter;
+    OwnPtr<WebKit::WebScrollbarThemeGeometry> m_geometry;
+    int m_scrollLayerId;
+
+    GC3Denum m_textureFormat;
+
+    RefPtr<CachingBitmapCanvasLayerTextureUpdater> m_backTrackUpdater;
+    RefPtr<CachingBitmapCanvasLayerTextureUpdater> m_foreTrackUpdater;
+    RefPtr<CachingBitmapCanvasLayerTextureUpdater> m_thumbUpdater;
+
+    // All the parts of the scrollbar except the thumb
+    OwnPtr<LayerTextureUpdater::Texture> m_backTrack;
+    OwnPtr<LayerTextureUpdater::Texture> m_foreTrack;
+    OwnPtr<LayerTextureUpdater::Texture> m_thumb;
+};
+
+}
+#endif // USE(ACCELERATED_COMPOSITING)
+
+#endif