Function fill 

pub fn fill<P: Pixel>(
    bitmap: &mut Bitmap<P>,
    clip: &Clip,
    path: &Path,
    pipe: &PipeState<'_>,
    src: &PipeSrc<'_>,
    matrix: &[f64; 6],
    flatness: f64,
    vector_antialias: bool,
)

Non-zero winding fill.