pub type PFNGLGETHISTOGRAMEXTPROC = Option<unsafe extern "C" fn(target: GLenum, reset: GLboolean, format: GLenum, type_: GLenum, values: *mut c_void)>;Aliased Type§
pub enum PFNGLGETHISTOGRAMEXTPROC {
None,
Some(unsafe extern "C" fn(u32, u8, u32, u32, *mut c_void)),
}