Refactoring ImageBuffer to decouple it from Canvas2DLayerBridge

Source/core/platform/graphics/gpu/AcceleratedImageBufferSurface.h

 /*
  * Copyright (c) 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef LayoutRectRecorder_h
-#define LayoutRectRecorder_h
+#ifndef AcceleratedImageBufferSurface_h
+#define AcceleratedImageBufferSurface_h
 
-#include "platform/geometry/LayoutRect.h"
-#include "wtf/Noncopyable.h"
+#include "platform/graphics/ImageBufferSurface.h"
+#include "wtf/OwnPtr.h"
 
 namespace WebCore {
 
-class RenderLayerModelObject;
-class RenderObject;
+class AcceleratedImageBufferSurface : public ImageBufferSurface {
+    WTF_MAKE_NONCOPYABLE(AcceleratedImageBufferSurface); WTF_MAKE_FAST_ALLOCATED;
+public:
+    AcceleratedImageBufferSurface(const IntSize&, OpacityMode = NonOpaque, float resolutionScale = 1.0f, int msaaSampleCount = 0);

[Stephen White, 2013/12/04 21:18:40]

I'm 99.99% certain we don't support hiDPI canvas. Do we still need
resolutionScale here?

+    virtual ~AcceleratedImageBufferSurface() { }
 
-class LayoutRectRecorder {
-    WTF_MAKE_NONCOPYABLE(LayoutRectRecorder);
-public:
-    LayoutRectRecorder(RenderObject&, bool skipRecording = false);
-    ~LayoutRectRecorder();
-
-    static bool shouldRecordLayoutRects();
+    virtual SkCanvas* canvas() const OVERRIDE { return m_canvas.get();}
+    virtual bool isValid() const OVERRIDE { return m_canvas; }
+    virtual bool isAccelerated() const OVERRIDE { return true; }
+    virtual Platform3DObject getBackingTexture() const OVERRIDE;
 
 private:
-    RenderObject& m_object;
-    RenderLayerModelObject* m_repaintContainer;
-    unsigned m_skipRecording : 1;
+    OwnPtr<SkCanvas> m_canvas;
 };
 
+
 } // namespace WebCore
 
-#endif // LayoutRectRecorder_h
-
+#endif