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

ui/cc/BitmapCanvasLayerTextureUpdater.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 BitmapCanvasLayerTextureUpdater_h
+#define BitmapCanvasLayerTextureUpdater_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "CanvasLayerTextureUpdater.h"
+#include "LayerTextureSubImage.h"
+
+class SkCanvas;
+
+namespace WebCore {
+
+class LayerPainterChromium;
+
+// This class rasterizes the contentRect into a skia bitmap canvas. It then updates
+// textures by copying from the canvas into the texture, using MapSubImage if
+// possible.
+class BitmapCanvasLayerTextureUpdater : public CanvasLayerTextureUpdater {
+public:
+    class Texture : public LayerTextureUpdater::Texture {
+    public:
+        Texture(BitmapCanvasLayerTextureUpdater*, PassOwnPtr<ManagedTexture>);
+        virtual ~Texture();
+
+        virtual void updateRect(CCGraphicsContext*, TextureAllocator*, const IntRect& sourceRect, const IntRect& destRect) OVERRIDE;
+
+    private:
+        BitmapCanvasLayerTextureUpdater* textureUpdater() { return m_textureUpdater; }
+
+        BitmapCanvasLayerTextureUpdater* m_textureUpdater;
+    };
+
+    static PassRefPtr<BitmapCanvasLayerTextureUpdater> create(PassOwnPtr<LayerPainterChromium>, bool useMapTexSubImage);
+    virtual ~BitmapCanvasLayerTextureUpdater();
+
+    virtual PassOwnPtr<LayerTextureUpdater::Texture> createTexture(TextureManager*);
+    virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat);
+    virtual void prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, float contentsScale, IntRect& resultingOpaqueRect) OVERRIDE;
+    void updateTextureRect(CCGraphicsContext*, TextureAllocator*, ManagedTexture*, const IntRect& sourceRect, const IntRect& destRect);
+
+    virtual void setOpaque(bool) OVERRIDE;
+
+private:
+    BitmapCanvasLayerTextureUpdater(PassOwnPtr<LayerPainterChromium>, bool useMapTexSubImage);
+
+    OwnPtr<SkCanvas> m_canvas;
+    IntSize m_canvasSize;
+    bool m_opaque;
+    LayerTextureSubImage m_texSubImage;
+};
+
+} // namespace WebCore
+#endif // USE(ACCELERATED_COMPOSITING)
+#endif // BitmapCanvasLayerTextureUpdater_h