cc/ScrollbarLayerChromium.h

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5
   6 #ifndef ScrollbarLayerChromium_h
   7 #define ScrollbarLayerChromium_h
   8
   9 #if USE(ACCELERATED_COMPOSITING)
  10
  11 #include "LayerChromium.h"
  12 #include "caching_bitmap_canvas_layer_texture_updater.h"
  13 #include <public/WebScrollbar.h>
  14 #include <public/WebScrollbarThemeGeometry.h>
  15 #include <public/WebScrollbarThemePainter.h>
  16
  17 namespace cc {
  18
  19 class Scrollbar;
  20 class ScrollbarThemeComposite;
  21 class CCTextureUpdateQueue;
  22
  23 class ScrollbarLayerChromium : public LayerChromium {
  24 public:
  25     virtual PassOwnPtr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
  26
  27     static scoped_refptr<ScrollbarLayerChromium> create(PassOwnPtr<WebKit::WebScrollbar>, WebKit::WebScrollbarThemePainter, PassOwnPtr<WebKit::WebScrollbarThemeGeometry>, int scrollLayerId);
  28
  29     // LayerChromium interface
  30     virtual bool needsContentsScale() const OVERRIDE;
  31     virtual IntSize contentBounds() const OVERRIDE;
  32     virtual void setTexturePriorities(const CCPriorityCalculator&) OVERRIDE;
  33     virtual void update(CCTextureUpdateQueue&, const CCOcclusionTracker*, CCRenderingStats&) OVERRIDE;
  34     virtual void setLayerTreeHost(CCLayerTreeHost*) OVERRIDE;
  35     virtual void pushPropertiesTo(CCLayerImpl*) OVERRIDE;
  36
  37     int scrollLayerId() const { return m_scrollLayerId; }
  38     void setScrollLayerId(int id) { m_scrollLayerId = id; }
  39
  40     virtual ScrollbarLayerChromium* toScrollbarLayerChromium() OVERRIDE;
  41
  42 protected:
  43     ScrollbarLayerChromium(PassOwnPtr<WebKit::WebScrollbar>, WebKit::WebScrollbarThemePainter, PassOwnPtr<WebKit::WebScrollbarThemeGeometry>, int scrollLayerId);
  44     virtual ~ScrollbarLayerChromium();
  45
  46 private:
  47     void updatePart(CachingBitmapCanvasLayerTextureUpdater*, LayerTextureUpdater::Texture*, const IntRect&, CCTextureUpdateQueue&, CCRenderingStats&);
  48     void createTextureUpdaterIfNeeded();
  49
  50     OwnPtr<WebKit::WebScrollbar> m_scrollbar;
  51     WebKit::WebScrollbarThemePainter m_painter;
  52     OwnPtr<WebKit::WebScrollbarThemeGeometry> m_geometry;
  53     int m_scrollLayerId;
  54
  55     GC3Denum m_textureFormat;
  56
  57     RefPtr<CachingBitmapCanvasLayerTextureUpdater> m_backTrackUpdater;
  58     RefPtr<CachingBitmapCanvasLayerTextureUpdater> m_foreTrackUpdater;
  59     RefPtr<CachingBitmapCanvasLayerTextureUpdater> m_thumbUpdater;
  60
  61     // All the parts of the scrollbar except the thumb
  62     OwnPtr<LayerTextureUpdater::Texture> m_backTrack;
  63     OwnPtr<LayerTextureUpdater::Texture> m_foreTrack;
  64     OwnPtr<LayerTextureUpdater::Texture> m_thumb;
  65 };
  66
  67 }
  68 #endif // USE(ACCELERATED_COMPOSITING)
  69
  70 #endif