[okular] [Bug 432611] New: Okular ignores system-wide sub-pixel rendering

[Vladimir Yerilov]

https://bugs.kde.org/show_bug.cgi?id=432611

            Bug ID: 432611
           Summary: Okular ignores system-wide sub-pixel rendering
           Product: okular
           Version: 20.12.2
          Platform: Manjaro
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: openmindead at gmail.com
  Target Milestone: ---

Created attachment 135484
  --> https://bugs.kde.org/attachment.cgi?id=135484&action=edit
Gray scale text in Okular

SUMMARY
Okular ignores system-wide setting for sub-pixel rendering, i.e. it uses
grayscale instead of RGB, for example.

STEPS TO REPRODUCE
1. Open any PDF file, scrot it, zoom the resulting file or just zoom using
Plasma's Zoom effect.
2. Do the same, but open the file in Kate.
3. See the difference.

OBSERVED RESULT
Grayscale rendering for text in Okular.

EXPECTED RESULT
Okular is supposed to follow explicitly set system settings, or have some
configuration preference for this, if that's set this way for some reason.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
On my system text opened in Okular is less readable than the same text opened
with e.g. WPS PDF reader due to the above-described issue(/feature?).

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