1cfg_if! { 2 if #[cfg(quartz)] { 3 mod quartz; 4 pub use self::quartz::*; 5 } else if #[cfg(x11)] { 6 mod x11; 7 pub use self::x11::*; 8 } else if #[cfg(dxgi)] { 9 mod dxgi; 10 pub use self::dxgi::*; 11 } else { 12 //TODO: Fallback implementation. 13 } 14}