1 files changed, 66 insertions, 0 deletions
diff --git a/cc/ScrollbarLayerChromium.h b/cc/ScrollbarLayerChromium.h
new file mode 100644
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+++ b/cc/ScrollbarLayerChromium.h
@@ -0,0 +1,66 @@
+// 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 "LayerTextureUpdater.h"
+#include <public/WebScrollbar.h>
+#include <public/WebScrollbarThemeGeometry.h>
+#include <public/WebScrollbarThemePainter.h>
+
+namespace WebCore {
+
+class Scrollbar;
+class ScrollbarThemeComposite;
+class CCTextureUpdateQueue;
+
+class ScrollbarLayerChromium : public LayerChromium {
+public:
+    virtual PassOwnPtr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
+    static PassRefPtr<ScrollbarLayerChromium> create(PassOwnPtr<WebKit::WebScrollbar>, WebKit::WebScrollbarThemePainter, PassOwnPtr<WebKit::WebScrollbarThemeGeometry>, int scrollLayerId);
+
+    // LayerChromium interface
+    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 { return this; }
+
+protected:
+    ScrollbarLayerChromium(PassOwnPtr<WebKit::WebScrollbar>, WebKit::WebScrollbarThemePainter, PassOwnPtr<WebKit::WebScrollbarThemeGeometry>, int scrollLayerId);
+
+private:
+    void updatePart(LayerTextureUpdater*, 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<LayerTextureUpdater> m_backTrackUpdater;
+    RefPtr<LayerTextureUpdater> m_foreTrackUpdater;
+    RefPtr<LayerTextureUpdater> 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