[okular] [Bug 401339] New: presentation: odd scaling/anti aliasing

[Dr. David Alan Gilbert (rh)]

https://bugs.kde.org/show_bug.cgi?id=401339

            Bug ID: 401339
           Summary: presentation: odd scaling/anti aliasing
           Product: okular
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: dgilbert at redhat.com
  Target Milestone: ---

Created attachment 116479
  --> https://bugs.kde.org/attachment.cgi?id=116479&action=edit
page as rendered by okular

SUMMARY

With the attached presentation I'm seeing two odd things:
  a) In presentation mode it's displaying really bad bitty fonts; as if it's
rendered for way too low a resolution and then upscaled
  b) Sometimes I'm seeing it skip pages - it's not eveyr time but it's weird
and page up/down will skip pages altogether.

STEPS TO REPRODUCE
1. Load attached presentation
2. shift-ctrl-p for full screen
3. page up/down

OBSERVED RESULT
a) The whole rendering is awful - as if it's to much too low a resolution (see
attached screen shots)
b) Sometimes the page up/down skips pages

EXPECTED RESULT
No skipped pages, and see the attached screen shot from evince

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: okular-18.08.1-1.fc29.x86_64 on Fedora 29 - shows as 1.5.1 in
about
(available in About System)
Running under xfce
Qt Version: qt5-qtbase-5.11.1-9.fc29.x86_64

ADDITIONAL INFORMATION
I'm running a dual head setup, with an internal 1920x1080 display on the laptop
and an external 3840x2160 uHD display.  The document is being displayed on the
external uHD.

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