The ZIFIMAGE Project is an effort to support the Zoomify viewer family of javascript viewers in the Drupal CMS. It was developed initially to support the ZIF file format and then extended somewhat to include support for some of the advanced modes of operation of the Zoomify viewers. Developementwas mainly done with version 4 of the viewer and test ded againbst version 5. Some changes were made to accomodate changes in the viewers operations between versions 4 and 5.. It's a Durpal 7 project.  So far I do not find Drupal 8/9 usable. I have no desire to port the program since the later vewrsions of Drupal are evan more incomprehensible than Drupal 7.