anchor.diff:          member x.Keyboard = keyboard :> IKeyboard
   
       interface IRenderWindow with
  -        member x.Run() = x.Run()+        member x.Run() = x.Run()
  +
  +    new(runtime : Runtime, enableDebug : bool, samples : int, stereo : bool) =
  +        let graphicsMode = 
  +            Graphics.GraphicsMode(
  +                OpenTK.Graphics.ColorFormat(Config.BitsPerPixel), 
  +                Config.DepthBits, 
  +                Config.StencilBits, 
  +                samples, 
  +                OpenTK.Graphics.ColorFormat.Empty,
  +                Config.Buffers, 
  +                stereo
  +            )
  +        new GameWindow(runtime,enableDebug,samples,graphicsMode)
  +
  +    new(runtime : Runtime, enableDebug : bool, samples : int) =
  +        new GameWindow(runtime, enableDebug, samples, false)
  
positive.code:     [<Literal>]
      let baseText = "Aardvark rocks \\o/ - OpenGL GameWindow"
  
  type GameWindow(runtime : Runtime, enableDebug : bool, samples : int) as this =
      inherit OpenTK.GameWindow(
          1024,
          768,
          Graphics.GraphicsMode(
              OpenTK.Graphics.ColorFormat(Config.BitsPerPixel), 
              Config.DepthBits, 
              Config.StencilBits, 
              samples, 
              OpenTK.Graphics.ColorFormat.Empty,
              Config.Buffers, 
              false
          ),
          DefaultText.baseText,
          GameWindowFlags.Default,
          DisplayDevice.Default,
  
negative.code:             [0, DefaultSemantic.Colors, Renderbuffer(ctx, 0, V2i.Zero, RenderbufferFormat.Rgba8, samples, 0L) :> IFramebufferOutput], None
          ) 
      let mutable defaultOutput = defaultFramebuffer |> OutputDescription.ofFramebuffer
  
      let mutable stereoFramebuffer : Option<OutputDescription * Framebuffer * Texture * Texture> = None
      let clearTask = runtime.CompileClear(fboSignature, Mod.constant C4f.Black, Mod.constant 1.0)
  
      let avgFrameTime = RunningMean(3)
      let sizes = Mod.init (V2i(base.ClientSize.Width, base.ClientSize.Height))
  