pub unsafe extern "C" fn graphene_quad_init(
q: *mut graphene_quad_t,
p1: *const graphene_point_t,
p2: *const graphene_point_t,
p3: *const graphene_point_t,
p4: *const graphene_point_t,
) -> *mut graphene_quad_t
pub unsafe extern "C" fn graphene_quad_init(
q: *mut graphene_quad_t,
p1: *const graphene_point_t,
p2: *const graphene_point_t,
p3: *const graphene_point_t,
p4: *const graphene_point_t,
) -> *mut graphene_quad_t