func (gc *GraphicContext) FillString(text string) (width float64) {
	return gc.FillStringAt(text, 0, 0)
}
func (gc *GraphicContext) FillString(text string) (width float64) {
	return gc.FillStringAt(text, 0, 0)
}
func ( gc * GraphicContext ) FillString ( text string ) ( width float64 ) { return gc . FillStringAt ( text , 0 , 0 ) }
// FillString draws the text at point (0, 0)
FillString draws the text at point ( 0 0 )