Function DrawPathEllipticArcRelative 

pub unsafe extern "C" fn DrawPathEllipticArcRelative(
    context: DrawContext,
    rx: f64,
    ry: f64,
    x_axis_rotation: f64,
    large_arc_flag: c_uint,
    sweep_flag: c_uint,
    x: f64,
    y: f64,
)