public override void Setup ()
        {
            canvas = (HTMLCanvasElement)Window.Self.Document.CreateElement ("canvas");

            Window.Self.Document.Body.AppendChild (canvas);

            gl = (WebGLRenderingContext)canvas.GetContext ("webkit-3d");
        }
        public override void Setup ()
        {
            canvas = (HTMLCanvasElement)Window.Self.Document.CreateElement ("canvas");

            Window.Self.Document.Body.AppendChild (canvas);

            ctx = (CanvasRenderingContext2D)canvas.GetContext ("2d");
        }