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

ui/cc/TextureCopier.h

+/*
+ * Copyright (C) 2012, 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 INC. 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 INC. 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 TextureCopier_h
+#define TextureCopier_h
+
+#include "GraphicsContext3D.h"
+#include "ProgramBinding.h"
+#include "ShaderChromium.h"
+#include "cc/CCGraphicsContext.h"
+
+namespace WebKit {
+class WebGraphicsContext3D;
+}
+
+namespace WebCore {
+class IntSize;
+
+class TextureCopier {
+public:
+    // Copy the base level contents of |sourceTextureId| to |destTextureId|. Both texture objects
+    // must be complete and have a base level of |size| dimensions. The color formats do not need
+    // to match, but |destTextureId| must have a renderable format.
+    virtual void copyTexture(CCGraphicsContext*, unsigned sourceTextureId, unsigned destTextureId, const IntSize&) = 0;
+
+protected:
+    virtual ~TextureCopier() { }
+};
+
+#if USE(ACCELERATED_COMPOSITING)
+
+class AcceleratedTextureCopier : public TextureCopier {
+    WTF_MAKE_NONCOPYABLE(AcceleratedTextureCopier);
+public:
+    static PassOwnPtr<AcceleratedTextureCopier> create(WebKit::WebGraphicsContext3D* context)
+    {
+        return adoptPtr(new AcceleratedTextureCopier(context));
+    }
+    virtual ~AcceleratedTextureCopier();
+
+    virtual void copyTexture(CCGraphicsContext*, unsigned sourceTextureId, unsigned destTextureId, const IntSize&);
+
+protected:
+    explicit AcceleratedTextureCopier(WebKit::WebGraphicsContext3D*);
+
+private:
+    typedef ProgramBinding<VertexShaderPosTexIdentity, FragmentShaderRGBATex> BlitProgram;
+
+    WebKit::WebGraphicsContext3D* m_context;
+    Platform3DObject m_fbo;
+    Platform3DObject m_positionBuffer;
+    OwnPtr<BlitProgram> m_blitProgram;
+};
+
+#endif // USE(ACCELERATED_COMPOSITING)
+
+}
+
+#endif