Initial import attempt, just to play with. Many things disabled/removed

ui/cc/FrameBufferSkPictureCanvasLayerTextureUpdater.h

+/*
+ * Copyright (C) 2011 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:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS 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 FrameBufferSkPictureCanvasLayerTextureUpdater_h
+#define FrameBufferSkPictureCanvasLayerTextureUpdater_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "SkPictureCanvasLayerTextureUpdater.h"
+
+namespace WebCore {
+
+// This class records the contentRect into an SkPicture, then uses accelerated
+// drawing to update the texture. The accelerated drawing goes to an
+// intermediate framebuffer and then is copied to the destination texture once done.
+class FrameBufferSkPictureCanvasLayerTextureUpdater : public SkPictureCanvasLayerTextureUpdater {
+public:
+    class Texture : public LayerTextureUpdater::Texture {
+    public:
+        Texture(FrameBufferSkPictureCanvasLayerTextureUpdater*, PassOwnPtr<ManagedTexture>);
+        virtual ~Texture();
+
+        virtual void updateRect(CCGraphicsContext*, TextureAllocator*, const IntRect& sourceRect, const IntRect& destRect) OVERRIDE;
+
+    private:
+        FrameBufferSkPictureCanvasLayerTextureUpdater* textureUpdater() { return m_textureUpdater; }
+
+        FrameBufferSkPictureCanvasLayerTextureUpdater* m_textureUpdater;
+    };
+
+    static PassRefPtr<FrameBufferSkPictureCanvasLayerTextureUpdater> create(PassOwnPtr<LayerPainterChromium>);
+    virtual ~FrameBufferSkPictureCanvasLayerTextureUpdater();
+
+    virtual PassOwnPtr<LayerTextureUpdater::Texture> createTexture(TextureManager*) OVERRIDE;
+    virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat) OVERRIDE;
+    //void updateTextureRect(PassRefPtr<GraphicsContext3D>, TextureAllocator*, ManagedTexture*, const IntRect& sourceRect, const IntRect& destRect);
+
+private:
+    explicit FrameBufferSkPictureCanvasLayerTextureUpdater(PassOwnPtr<LayerPainterChromium>);
+};
+} // namespace WebCore
+#endif // USE(ACCELERATED_COMPOSITING)
+#endif // FrameBufferSkPictureCanvasLayerTextureUpdater_h