Function graphene_sys::graphene_point3d_normalize_viewport

pub unsafe extern "C" fn graphene_point3d_normalize_viewport(
    p: *const graphene_point3d_t, 
    viewport: *const graphene_rect_t, 
    z_near: c_float, 
    z_far: c_float, 
    res: *mut graphene_point3d_t
)