Okular

Okular is a universal document viewer. It is distributed as free software under the GNU General Public License ( GPL) as part of the KDE Software Compilation 4. It builds on KPDF and dissolves in KDE SC 4 individual programs KPDF, KGhostView, KFax, KFaxview, KView and KDVI from.

Opposite KPDF offers eyepiece now, among other things, a system for bookmarks and for comments, support for forms and multimedia content, multi-column display and rotating the pages.

Since Version 0.15 annotations to a PDF document can be saved. This version was released together with KDE 4.9. In previous versions, comments and remarks were not stored directly in the file, but in an external xml file.

Eyepiece was launched at the Google Summer of Code 2005 by Piotr Szymanski to life.

Technical details

The core consists of a program library which abstracts the modules for each format. Their functionality can then be used with the associated graphical user interface or simply integrated into other programs.

It supports the following file formats:

  • Portable Document Format (PDF ) using Poppler
  • PostScript by libgs
  • Tagged Image File Format (TIFF ) using libTIFF
  • Compiled HTML Help (CHM ) using libchm
  • DjVu means DjVuLibre
  • Various image formats
  • Device independent file format (DVI)
  • XML Paper Specification ( XPS)
  • OpenDocument files (ODF )
  • EPUB
  • Fiction Book
  • Comic Book
  • Mobipocket
  • Plucker
Software maintainer FreeBSD Electronic document Poppler (software) Evince
615485
de