The code in the directory 'libjasper' is taken from the Jasper package. In particular, from the 'src/libjasper' directory of Jasper Version 1.600.0. The adaptation was done by Bryan Henderson on 2002.10.26. The adaptation involved: - remove stuff for formats other than PNM. - Replace build stuff (Jasper uses GNU Autoconf/Automake/Libtool). See . You cannot build this library without a 64 bit compiler (and 64 bit types such as int64_t defined). It does a lot of 64 bit arithmetic.