https://bugs.kde.org/show_bug.cgi?id=507688
Bug ID: 507688
Summary: Regression: Broken rendering at high zoom levels of
particular pdf document
Classification: Applications
Product: okular
Version First 25.04.3
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Keywords: regression
Severity: normal
Priority: NOR
Component: PDF backend
Assignee: okular-devel@kde.org
Reporter: jan.rathm...@gmx.de
Target Milestone: ---
SUMMARY
The rendering of a particular pdf file is broken when using higher zoom levels
(> 150%?).
STEPS TO REPRODUCE
1. Open the following pdf file in Okular:
https://www.nvv.de/fileadmin/nvv/data/2._Fahrtinfo/4._Liniennetz/Liniennetz_KasselPlus_Schematisch.pdf
2. Set Zoom level to 200%, or zoom in by mouse wheel etc.
OBSERVED RESULT
The rendering looks broken when zoomed in, see attached screenshot.
EXPECTED RESULT
The rendering looks fine at all zoom levels.
ADDITIONAL INFORMATION
This seems to be a regression that happened after Okular 24.12.3 release.
I can reproduce it with:
* Kubuntu 25.04 + Backports-PPA, Okular 25.04.3, Poppler 0.6.5, Frameworks
6.14.0, Qt 6.8.3
* Fedora Rawhide live image 20250725, Okular 25.07.80, Poppler 0.6.5,
Frameworks 6.16.0, Qt 6.9.1
* Neon Unstable live image 20250727, Okular 25.11.70, Poppler 0.6.5, Frameworks
6.17.0, Qt 6.9.1
* Neon User live image 20250727, Okular 25.04.3, Popper 0.6.5, Frameworks
6.16.0, Qt 6.9.1
I could _not_ reproduce it with:
* Kubuntu 25.04 live image, Okular 24.12.3, Poppler 0.6.5, Frameworks 6.12.0,
Qt 6.8.3
* Fedora 42 live image, Okular 24.12.3, Poppler 0.6.5, Frameworks 6.12.0, Qt
6.8.2
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