1 files changed, 46 insertions, 1 deletions
diff --git a/cc/skpicture_canvas_layer_texture_updater.h b/cc/skpicture_canvas_layer_texture_updater.h
index 638cbb2..fd9bb5f 100644
--- a/cc/skpicture_canvas_layer_texture_updater.h
+++ b/cc/skpicture_canvas_layer_texture_updater.h
@@ -1,3 +1,48 @@
-// Copyright 2012 The Chromium Authors. All rights reserved.
+// Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
+
+
+#ifndef SkPictureCanvasLayerTextureUpdater_h
+#define SkPictureCanvasLayerTextureUpdater_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "CanvasLayerTextureUpdater.h"
+#include "SkPicture.h"
+
+class SkCanvas;
+
+namespace cc {
+
+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 contentsWidthScale, float contentsHeightScale, IntRect& resultingOpaqueRect, CCRenderingStats&) 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 cc
+#endif // USE(ACCELERATED_COMPOSITING)
+#endif // SkPictureCanvasLayerTextureUpdater_h