Welcome to Lucide

Lucide is a plugin based document viewer for OS/2 and derivative operating systems, which currently supports PDF, DjVu, and a number of image format files (JPG, through the included plugin, and many bitmap formats through the Generalised Bitmap Module, available here. Support for new document types may be added as additional plugins.

Current Status


  • Versions 1.30 and higher have been released and distributed under CDDL/LGPL (dual license model).
  • Versions up through 1.21 were only released in binary form, under a proprietary license.

Development & Release

Development of Lucide has been renewed as of December, 2015, in cooperation with Arca Noae, LLC and affiliated developers. Further details regarding new releases will be made as work progresses.

For the latest releases, see Latest Versions, below.

Additional software prerequisites

It is strongly recommended to install from RPM (using YUM or Arca Noae Package Manager), though zipped packages may be available for some prerequisites.

If you use RPM, you should install the following with the single command for versions up through 1.3.5:

yum install libc libgcc1 libgcc-fwd libstdc++6 libsupc++6 uclip

or use Arca Noae Package Manager's Quick install feature (YUM | Quick install...) and paste the following into the dialog box:

libc libgcc1 libgcc-fwd libstdc++6 libsupc++6 uclip

For WPI:

kLibc 0.6.6 LibraryWPIkLibc Runtime libraries
GCC 4 Core LibrariesWPIGCC 4 runtime libraries
UClipWPIenhanced OS/2 clipboard support

For version 1.4.0 and newer, the Quick install list is:

libc libcx libgcc1 libgcc-fwd libstdc++6 libsupc++6 poppler poppler-data libjpeg djvulibre uclip

To have Japanese fonts working in 1.5.0 you need the poppler-data package. This is listed above. If you do not wish to add such support, you may omit it from the Quick install list. Libcx is not required for version 1.4.0.

Notes about RPM/YUM updates

From time to time, updates to various RPMs may break compatibility with some Lucide components. This is particularly true of the PDF plugin, which depends upon the poppler library, which may require a "legacy" package to be installed to satisfy its dependency. As of Lucide 1.5.0, the PDF plugin requires poppler 0.59.0. If updating poppler beyond 0.59.0, be sure to select the latest poppler-legacy-<version>-0.59.0-<release> for your platform (e.g., poppler-legacy-70-0.59.0-3.oc00.L) to satisfy the PDF plugin's dependency.

Newer legacy versions do not replace older ones, but merely provide additional backward compatibility. Thus, poppler-legacy-70-0.59.0-3.oc00.L may be installed alongside poppler-legacy-66-0.52.0-1.oc00.L as they provide different compatibilities (the "70-0.59.0" package does not update, upgrade, obsolete, or replace the "66-0.52.0" legacy package; they do different things).

Latest Versions

The latest stable version is 1.5.0.

Lucide is available for downloading in the following packages and formats:

Lucide executable and pluginsWPI1.5.0Updated on 2019/03/20
Lucide executable and pluginsWPI1.4.0Updated on 2017/04/21
Lucide executable and pluginsWPI1.3.5updated poppler lib
Lucide executable and pluginsZIP1.3.5updated poppler lib

Mailing Lists

There are currently two mailing lists for Lucide: one for users, and one for developers. If you want to join either or both, please read the instructions on the Netlabs Wiki. As the Gmane web service shut down at the end of July, 2016, you may access the list archives via NNTP, here:

Bugs & Features

Lucide continues to be an ongoing project, with some features still to be added and some longer-standing issues to be addressed. If you encounter an issue or have an enhancement request, you are welcome to register it as a new ticket. Please make sure you check the list of open tickets first, to see if your issue may have already been reported. Also, try to assign it to the correct component of the program; this is quite easy to do with TRAC. We will do our best to review tickets regularly and will leave comments if we need more info. Please revisit the Feedback analysis for overall status updates. If we leave a comment and still do not receive a response from the ticket creator, the issue will likely be closed in a reasonable amount of time. If you want an email notification when a ticket is changed you need to go into your preferences and on the "General" page add your name and email. This needs to be done separately for each project.

Anonymous access to the ticket system has been restricted due to multiple spam attacks. In order to create a new ticket or comment on an existing one, you will need to log in with your Netlabs login id. If you do not have a login id, you may request one here.

Due to the inclusion of a forwarder in recent poppler builds, issues experienced before where the installation of a new poppler build would result in Lucide's PDF plugin not being loaded have essentially been resolved. The Lucide Project extends great thanks to the porting team for their consideration and work in this regard. (See updating notes above for cautions which still apply.)


We are currently seeking interested developers to make Lucide even more useful, adding features like tabbed viewing, more flexible print layouts, an even more intuitive user interface, better rendering performance for currently-supported document types, and of course, to build new plugins to handle more document types overall.

Creating New Plugins

The plugin API uses SOM. This allows programmers to write their own plugins without the need to recompile them every time a new Lucide release is done. It's up to the developer to decide if the plugin he/she writes will be open source or not; Lucide, due to its being dual-licensed, will work with both type of plugins.

Please read How to write your own plugins for Lucide.

Plugin Source Code

You may download the sources for all of our plugins directly from the svn repository. If you have any problems, please post to the developer list.

  • The svn trunk contains source for all Lucide plugins. Note that one of the new design goals is to remove Lucide's dependence on special library builds and to utilize the system-installed ones. Thus, poppler, DjVu, and jpeg sources are no longer included in this repository.

Building Lucide

Last modified 2 weeks ago Last modified on Jul 20, 2020, 12:09:26 AM