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

ui/cc/TextureLayerChromium.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:
+ *
+ * 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 TextureLayerChromium_h
+#define TextureLayerChromium_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "LayerChromium.h"
+
+namespace WebKit {
+class WebGraphicsContext3D;
+}
+
+namespace WebCore {
+
+class TextureLayerChromiumClient {
+public:
+    // Called to prepare this layer's texture for compositing. The client may queue a texture
+    // upload or copy on the CCTextureUpdater.
+    // Returns the texture ID to be used for compositing.
+    virtual unsigned prepareTexture(CCTextureUpdater&) = 0;
+
+    // Returns the context that is providing the texture. Used for rate limiting and detecting lost context.
+    virtual WebKit::WebGraphicsContext3D* context() = 0;
+
+protected:
+    virtual ~TextureLayerChromiumClient() { }
+};
+
+// A Layer containing a the rendered output of a plugin instance.
+class TextureLayerChromium : public LayerChromium {
+public:
+    // If this texture layer requires special preparation logic for each frame driven by
+    // the compositor, pass in a non-nil client. Pass in a nil client pointer if texture updates
+    // are driven by an external process.
+    static PassRefPtr<TextureLayerChromium> create(TextureLayerChromiumClient*);
+    virtual ~TextureLayerChromium();
+
+    void clearClient() { m_client = 0; }
+
+    virtual PassOwnPtr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
+
+    // Sets whether this texture should be Y-flipped at draw time. Defaults to true.
+    void setFlipped(bool);
+
+    // Sets a UV transform to be used at draw time. Defaults to (0, 0, 1, 1).
+    void setUVRect(const FloatRect&);
+
+    // Sets whether the alpha channel is premultiplied or unpremultiplied. Defaults to true.
+    void setPremultipliedAlpha(bool);
+
+    // Sets whether this context should rate limit on damage to prevent too many frames from
+    // being queued up before the compositor gets a chance to run. Requires a non-nil client.
+    // Defaults to false.
+    void setRateLimitContext(bool);
+
+    // Code path for plugins which supply their own texture ID.
+    void setTextureId(unsigned);
+
+    void willModifyTexture();
+
+    virtual void setNeedsDisplayRect(const FloatRect&) OVERRIDE;
+
+    virtual void setLayerTreeHost(CCLayerTreeHost*) OVERRIDE;
+    virtual bool drawsContent() const OVERRIDE;
+    virtual void update(CCTextureUpdater&, const CCOcclusionTracker*) OVERRIDE;
+    virtual void pushPropertiesTo(CCLayerImpl*) OVERRIDE;
+
+protected:
+    explicit TextureLayerChromium(TextureLayerChromiumClient*);
+
+private:
+    TextureLayerChromiumClient* m_client;
+
+    bool m_flipped;
+    FloatRect m_uvRect;
+    bool m_premultipliedAlpha;
+    bool m_rateLimitContext;
+    bool m_contextLost;
+
+    unsigned m_textureId;
+};
+
+}
+#endif // USE(ACCELERATED_COMPOSITING)
+
+#endif