code: func SetScreenSize(width int, height int) {
  	if canvas.width == width && canvas.height == height {
  		return
  	}
  
  	canvas.width = width
  	canvas.height = height
  
  	canvas.clipStack = make([]rect, 0)
  	SetClipRect(0, 0, width, height)
  }
docs: // SetSize sets the new Canvas size. If new size does not
  // equal old size then Canvas is recreated and cleared
  // with default colors. Both Canvas width and height must
  // be greater than 2