--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/html/canvas/CanvasObject.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,73 @@
+/*
+ * 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. 
+ */
+
+#include "config.h"
+
+#if ENABLE(3D_CANVAS)
+
+#include "CanvasObject.h"
+#include "WebGLRenderingContext.h"
+
+namespace WebCore {
+    
+CanvasObject::CanvasObject(WebGLRenderingContext* context)
+    : m_object(0)
+    , m_shouldDeleteObject(true)
+    , m_context(context)
+{
+}
+
+CanvasObject::~CanvasObject()
+{
+    if (m_context)
+        m_context->removeObject(this);
+}
+
+void CanvasObject::setObject(Platform3DObject object, bool shouldDeleteObject)
+{
+    if (object == m_object)
+        return;
+        
+    deleteObject();
+    m_object = object;
+    m_shouldDeleteObject = shouldDeleteObject;
+}
+
+void CanvasObject::deleteObject()
+{
+    if (m_object) {
+        if (m_shouldDeleteObject)
+            if (m_context) {
+                m_context->graphicsContext3D()->makeContextCurrent();
+                _deleteObject(m_object);
+            }
+        m_object = 0;
+    }
+    m_shouldDeleteObject = true;
+}
+
+}
+
+#endif // ENABLE(3D_CANVAS)