Function im_cooc_matrix 

pub unsafe extern "C" fn im_cooc_matrix(
    im: *mut VipsImage,
    m: *mut VipsImage,
    xp: c_int,
    yp: c_int,
    xs: c_int,
    ys: c_int,
    dx: c_int,
    dy: c_int,
    flag: c_int,
) -> c_int