An Islandora viewer module using OpenSeadragon. Works with large image datastreams (JPEG-2000). Supports a custom Djatoka tilesource and a IIIF tilesource.
Based in spirit from the JS component of Kevin Clarke's FreeLib-Djatoka
This module requires the following modules/libraries:
Install as usual, see this for further information.
Download and install the Openseadragon library to your sites/libraries folder, or run
drush openseadragon-plugin. Openseadragon 2.3.1 is known to work well with Islandora.
Note: If you use the Drush command, it is advisable to Move (not copy) the install script to your
.drush folder and run it.
Djatoka Image Server
Set the paths for 'Djatoka server base URL' and configure OpenSeadragon in Administration » Islandora » Islandora Viewers » OpenSeadragon (admin/islandora/islandora_viewers/openseadragon).
If you have an existing install it's required to update Openseadragon to it's latest version. You can do this quickly with the provided Drush command.
Apache Reverse Proxy
Reverse proxy config: We make the assumption that we (reverse) proxy Djatoka, to fix the same-origin issue.
For Apache, with Drupal running on the same box as Apache, a couple lines like:
ProxyPass /adore-djatoka http://localhost:8080/adore-djatoka ProxyPassReverse /adore-djatoka http://localhost:8080/adore-djatoka
in the Apache config somewhere (either the main apache.conf, httpd.conf, or in and arbitrarily named
*.conf in your Apache's conf.d directory should suffice to establish the reverse proxy.
In Debian derived systems one will need to create location entries for each proxy or remove the Deny from All in mod_proxy's conf file.
Any IIIF image server can be used the the IIIF tile source. The IIIF tile source provides a full URL to the datastream to be displayed as the IIIF
identifier. The IIIF server needs to be configured to resolve this full URL to retrieve the image.
Further documentation for this module is available at our wiki
Having problems or solved a problem? Check out the Islandora google groups for a solution.
If you would like to contribute to this module, please check out CONTRIBUTING.md. In addition, we have helpful Documentation for Developers info, as well as our Developers section on the Islandora.ca site.