Function pangocairo_sys::cairo_mesh_pattern_set_corner_color_rgba

pub unsafe extern "C" fn cairo_mesh_pattern_set_corner_color_rgba(
    pattern: *mut cairo_pattern_t, 
    corner_num: c_uint, 
    red: c_double, 
    green: c_double, 
    blue: c_double, 
    alpha: c_double
)