func NewScreenFramebufferImage(width, height int) *Image {
	i := &Image{
		image:  graphicscommand.NewScreenFramebufferImage(width, height),
		screen: true,
	}
	i.clear()
	theImages.add(i)
	return i
}
func NewScreenFramebufferImage(width, height int) *Image {
	i := &Image{
		image:  graphicscommand.NewScreenFramebufferImage(width, height),
		screen: true,
	}
	i.clear()
	theImages.add(i)
	return i
}
// NewScreenFramebufferImage creates a special image that framebuffer is one for the screen.
//
// The returned image is cleared.
//
// Note that Dispose is not called automatically.