pub type PFNGLGETPROGRAMENVPARAMETERDVARBPROC = Option<unsafe extern "C" fn(target: GLenum, index: GLuint, params: *mut GLdouble)>;Aliased Type§
pub enum PFNGLGETPROGRAMENVPARAMETERDVARBPROC {
None,
Some(unsafe extern "C" fn(u32, u32, *mut f64)),
}