Function CompressedTexImage2D 

pub unsafe fn CompressedTexImage2D(
    target: u32,
    level: i32,
    internalformat: u32,
    width: i32,
    height: i32,
    border: i32,
    imageSize: i32,
    data: *const c_void,
)

Fallbacks: CompressedTexImage2DARB