... GPI Data Pipeline 1.0 documentation . ... GPItv Development . ... Image Storage . ... GPItv is a very large, very complex program with lots of internal dependencies and complex data structures, extensive use of IDL?s object orientation, pointers, and widget programming techniques. ... If the first input to GPItv::open is not a string, it is assumed to be a data array, is assigned to the main_image variable in the images structure (see Image Storage ) and then calls GPItv::setup_new_image . ...