// palette.Plan9 is used in place of a nil Quantizer.
	Quantizer draw.Quantizer

	// Drawer is used to convert the source image to the desired palette.
	// draw.FloydSteinberg is used in place of a nil Drawer.
	Drawer draw.Drawer
}

// EncodeAll writes the images in g to w in GIF format with the
// given loop count and delay between frames.
func EncodeAll(w io.Writer, g *GIF) error {