https://bugs.kde.org/show_bug.cgi?id=448462
Bug ID: 448462
Summary: PDF images may display repeated rectangular artefacts
in the background at certain zooms
Product: okular
Version: 21.12.0
Platform: Mint (Ubuntu based)
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: printing
Assignee: okular-de...@kde.org
Reporter: greenandpleasant2000-supp...@yahoo.co.uk
Target Milestone: ---
Created attachment 145458
--> https://bugs.kde.org/attachment.cgi?id=145458&action=edit
PDF showing visual artefacts at certain zoom settings
SUMMARY
***
At certain zoom levels pdf images may display repeating rectangual markings
whose size is related to the zoom level..
***
STEPS TO REPRODUCE
1. Open the attached pdf ("artefact"). This is actually an image, although text
is displayed.
2. Set zoom level to 100%, then 110%.
3. Now, set zoom to 120%, then 125%.
OBSERVED RESULT
The view is as expected up to 110%. However, at 120%, you can definately make
out repeating, bluish, rectangles in the background. These become very much
smaller at 125%, and gradually fade away at incrementally larger zooms up to
150% or so.
EXPECTED RESULT
Obviously, there should be no such visual artefacts at any zoom.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux Mint
(available in About System)
KDE Plasma Version:
KDE Frameworks Version: 5.89
Qt Version: 5.15.3
ADDITIONAL INFORMATION
No artefacts were visible when viewing the same document at similar zooms in
Xreader.
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