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

ui/cc/BitmapSkPictureCanvasLayerTextureUpdater.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 BitmapSkPictureCanvasLayerTextureUpdater_h
+#define BitmapSkPictureCanvasLayerTextureUpdater_h
+
+#if USE(ACCELERATED_COMPOSITING)
+#include "LayerTextureSubImage.h"
+#include "SkBitmap.h"
+#include "SkPictureCanvasLayerTextureUpdater.h"
+
+namespace WebCore {
+
+// This class records the contentRect into an SkPicture, then software rasterizes
+// the SkPicture into bitmaps for each tile. This implements CCSettings::perTilePainting.
+class BitmapSkPictureCanvasLayerTextureUpdater : public SkPictureCanvasLayerTextureUpdater {
+public:
+    class Texture : public CanvasLayerTextureUpdater::Texture {
+    public:
+        Texture(BitmapSkPictureCanvasLayerTextureUpdater*, PassOwnPtr<ManagedTexture>);
+
+        virtual void prepareRect(const IntRect& sourceRect) OVERRIDE;
+        virtual void updateRect(CCGraphicsContext*, TextureAllocator*, const IntRect& sourceRect, const IntRect& destRect) OVERRIDE;
+
+    private:
+        BitmapSkPictureCanvasLayerTextureUpdater* textureUpdater() { return m_textureUpdater; }
+
+        SkBitmap m_bitmap;
+        BitmapSkPictureCanvasLayerTextureUpdater* m_textureUpdater;
+    };
+
+    static PassRefPtr<BitmapSkPictureCanvasLayerTextureUpdater> create(PassOwnPtr<LayerPainterChromium>, bool useMapTexSubImage);
+    virtual ~BitmapSkPictureCanvasLayerTextureUpdater();
+
+    virtual PassOwnPtr<LayerTextureUpdater::Texture> createTexture(TextureManager*) OVERRIDE;
+    virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat) OVERRIDE;
+    virtual void prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, float contentsScale, IntRect& resultingOpaqueRect) OVERRIDE;
+    void paintContentsRect(SkCanvas*, const IntRect& sourceRect);
+    void updateTextureRect(CCGraphicsContext*, GC3Denum format, const IntRect& destRect, const uint8_t* pixels);
+
+private:
+    BitmapSkPictureCanvasLayerTextureUpdater(PassOwnPtr<LayerPainterChromium>, bool useMapTexSubImage);
+
+    LayerTextureSubImage m_texSubImage;
+};
+} // namespace WebCore
+#endif // USE(ACCELERATED_COMPOSITING)
+#endif // BitmapSkPictureCanvasLayerTextureUpdater_h