Function pattern_match 

pub fn pattern_match(
    patt_handle: &ARPattHandle,
    mode: i32,
    data: &[u8],
    size: i32,
    code: &mut i32,
    dir: &mut i32,
    cf: &mut ARdouble,
) -> Result<(), &'static str>

Matches the unwarped square marker against loaded templates via NCC (Normalized Cross Correlation).