diff -r 000000000000 -r 4f2f89ce4247 WebCore/html/canvas/WebGLFramebuffer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/html/canvas/WebGLFramebuffer.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2009 Apple 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 COMPUTER, INC. ``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 COMPUTER, INC. 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 WebGLFramebuffer_h
+#define WebGLFramebuffer_h
+
+#include "CanvasObject.h"
+
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+    class WebGLFramebuffer : public CanvasObject {
+    public:
+        virtual ~WebGLFramebuffer() { deleteObject(); }
+        
+        static PassRefPtr<WebGLFramebuffer> create(WebGLRenderingContext*);
+
+        bool isDepthAttached() const { return (m_depthAttachment && m_depthAttachment->object()); }
+        bool isStencilAttached() const { return (m_stencilAttachment && m_stencilAttachment->object()); }
+        bool isDepthStencilAttached() const { return (m_depthStencilAttachment && m_depthStencilAttachment->object()); }
+
+        void setAttachment(unsigned long, CanvasObject*);
+
+        // This function is called right after a framebuffer is bound.
+        // Because renderbuffers and textures attached to the framebuffer might
+        // have changed and the framebuffer might have become complete when it
+        // isn't bound, so we need to clear un-initialized renderbuffers.
+        void onBind();
+
+        // When a texture or a renderbuffer changes, we need to check the
+        // current bound framebuffer; if the newly changed object is attached
+        // to the framebuffer and the framebuffer becomes complete, we need to
+        // clear un-initialized renderbuffers.
+        void onAttachedObjectChange(CanvasObject*);
+
+        unsigned long getColorBufferFormat();
+
+    protected:
+        WebGLFramebuffer(WebGLRenderingContext*);
+        
+        virtual void _deleteObject(Platform3DObject);
+
+    private:
+        virtual bool isFramebuffer() const { return true; }
+
+        bool isUninitialized(CanvasObject*);
+        void setInitialized(CanvasObject*);
+        void initializeRenderbuffers();
+
+        // These objects are kept alive by the global table in
+        // WebGLRenderingContext.
+        CanvasObject* m_colorAttachment;
+        CanvasObject* m_depthAttachment;
+        CanvasObject* m_stencilAttachment;
+        CanvasObject* m_depthStencilAttachment;
+    };
+    
+} // namespace WebCore
+
+#endif // WebGLFramebuffer_h