kdu_precinct::get_unique_id

The return value from this function uniquely identifies the precinct amongst all precincts associated with the compressed image representation. This unique identifier is identical to that used by the kdu_compressed_source::set_precinct_scope function to recover a precinct's packets from a cached compressed data source. The formula used to determine the unique identifier is described with that function. This connection facilitates the recovery of packet data in a server which may then be transmitted to a caching client in client-server applications.