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

ui/cc/SkPictureCanvasLayerTextureUpdater.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 SkPictureCanvasLayerTextureUpdater_h
+#define SkPictureCanvasLayerTextureUpdater_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "CanvasLayerTextureUpdater.h"
+#include "SkPicture.h"
+
+class SkCanvas;
+
+namespace WebCore {
+
+class LayerPainterChromium;
+
+// This class records the contentRect into an SkPicture. Subclasses, provide
+// different implementations of tile updating based on this recorded picture.
+// The BitmapSkPictureCanvasLayerTextureUpdater and
+// FrameBufferSkPictureCanvasLayerTextureUpdater are two examples of such
+// implementations.
+class SkPictureCanvasLayerTextureUpdater : public CanvasLayerTextureUpdater {
+public:
+    virtual ~SkPictureCanvasLayerTextureUpdater();
+
+    virtual void setOpaque(bool) OVERRIDE;
+
+protected:
+    explicit SkPictureCanvasLayerTextureUpdater(PassOwnPtr<LayerPainterChromium>);
+
+    virtual void prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, float contentsScale, IntRect& resultingOpaqueRect) OVERRIDE;
+    void drawPicture(SkCanvas*);
+
+    bool layerIsOpaque() const { return m_layerIsOpaque; }
+
+private:
+    // Recording canvas.
+    SkPicture m_picture;
+    // True when it is known that all output pixels will be opaque.
+    bool m_layerIsOpaque;
+};
+
+} // namespace WebCore
+#endif // USE(ACCELERATED_COMPOSITING)
+#endif // SkPictureCanvasLayerTextureUpdater_h