[okular] [Bug 414678] New: Okular does not render PDF version 1.2 or 1.3 documents correctly

[Jim Sanderson]

https://bugs.kde.org/show_bug.cgi?id=414678

            Bug ID: 414678
           Summary: Okular does not render PDF version 1.2 or 1.3
                    documents correctly
           Product: okular
           Version: 1.8.3
          Platform: Kubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: jssalesmail at gmail.com
  Target Milestone: ---

SUMMARY
PDF documents only show images and no text.  The text is there

STEPS TO REPRODUCE
1. Open PDF document where the format is version 1.2 or 1.3.

OBSERVED RESULT
Only images are displayed.  Text is invisible but still there.  It can be
copied.

EXPECTED RESULT
Display PDF document.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.17.3
KDE Frameworks Version: 5.64.0
Qt Version: 5.12.4

ADDITIONAL INFORMATION
PDF Backend version 0.6.5
Poppler version 0.80.0
xcb windowing system
Kernel version: 5.3.0-23-generic

PDF versions 1.4 and above display properly.
I have loaded multiple documents with versions 1.2 and 1.3 into LibreOffice
Draw and then exported them to PDF, which results in a version 1.5 PDF and the
documents display properly.  This is my current workaround.

Anything initially created as version 1.4 or above are fine.

This happened after the upgrade to Kubuntu 19.10.

The backport ppa has been enabled and an update done.   Synaptic and Muon both
say the system is up-to-date.

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