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

ui/cc/ContentLayerChromium.h

+/*
+ * Copyright (C) 2010 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 ContentLayerChromium_h
+#define ContentLayerChromium_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "TiledLayerChromium.h"
+
+class SkCanvas;
+
+namespace WebCore {
+
+class IntRect;
+class LayerTextureUpdater;
+
+class ContentLayerDelegate {
+public:
+    virtual void paintContents(SkCanvas*, const IntRect& clip, IntRect& opaque) = 0;
+
+protected:
+    virtual ~ContentLayerDelegate() { }
+};
+
+// A layer that renders its contents into an SkCanvas.
+class ContentLayerChromium : public TiledLayerChromium {
+public:
+    static PassRefPtr<ContentLayerChromium> create(ContentLayerDelegate*);
+
+    virtual ~ContentLayerChromium();
+
+    void clearDelegate() { m_delegate = 0; }
+
+    virtual bool drawsContent() const OVERRIDE;
+    virtual void update(CCTextureUpdater&, const CCOcclusionTracker*) OVERRIDE;
+    virtual void idleUpdate(CCTextureUpdater&, const CCOcclusionTracker*) OVERRIDE;
+
+    virtual void setOpaque(bool) OVERRIDE;
+
+protected:
+    explicit ContentLayerChromium(ContentLayerDelegate*);
+
+
+private:
+    virtual LayerTextureUpdater* textureUpdater() const OVERRIDE { return m_textureUpdater.get(); }
+    virtual void createTextureUpdaterIfNeeded() OVERRIDE;
+
+    ContentLayerDelegate* m_delegate;
+    RefPtr<LayerTextureUpdater> m_textureUpdater;
+};
+
+}
+#endif // USE(ACCELERATED_COMPOSITING)
+
+#endif