Function cairo_sys::cairo_mesh_pattern_curve_to

pub unsafe extern "C" fn cairo_mesh_pattern_curve_to(
    pattern: *mut cairo_pattern_t, 
    x1: c_double, 
    y1: c_double, 
    x2: c_double, 
    y2: c_double, 
    x3: c_double, 
    y3: c_double
)