Bug 516071 - Rendering error on certain zoom levels
Summary: Rendering error on certain zoom levels
Status: CONFIRMED
Alias: None
Product: okular
Classification: Applications
Component: PDF backend (other bugs)
Version First Reported In: 25.08.1
Platform: Microsoft Windows Microsoft Windows
: NOR normal
Target Milestone: ---
Assignee: Okular developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-02-16 06:23 UTC by Emir SARI
Modified: 2026-02-16 10:17 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

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screenshot (34.96 KB, image/png)
2026-02-16 06:23 UTC, Emir SARI 		Details
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Description Emir SARI 2026-02-16 06:23:54 UTC 
Created attachment 189638 [details]
screenshot

Okular 25.08.1, Microsoft Store version (probably valid for other OS as well)

See screenshot. On zoom levels 200% and higher, colours are not properly displayed. When going higher zoom levels with 5% increments, it does not occur sometimes. Please compare the thumbnail and the actual render.
Comment 1 Sune Vuorela 2026-02-16 09:58:58 UTC 
This is related to overprint. IF one disable overprint in the settings, it renders fine on all zoom levels.

The document (which I have received) does have HasVisibleOverprint = True
Comment 2 Sune Vuorela 2026-02-16 10:17:37 UTC 
(In reply to Sune Vuorela from comment #1)
> This is related to overprint. IF one disable overprint in the settings, it
> renders fine on all zoom levels.
> 
> The document (which I have received) does have HasVisibleOverprint = True

I can share the document with specific developers if needed.