pub static VERTEX_110: &str = include_str!("shaders/vertex_110.glsl");
pub static VERTEX_140: &str = include_str!("shaders/vertex_140.glsl");
pub static FRAGMENT_110: &str = include_str!("shaders/fragment_110.glsl");
pub static FRAGMENT_140: &str = include_str!("shaders/fragment_140.glsl");