Bug 503321

Summary: When taking rectangular screenshot and holding Shift, region preview is blurry
Product: [Applications] Spectacle Reporter: nyanpasu64 <nyanpasu64>
Component: GeneralAssignee: Noah Davis <noahadvs>
Status: RESOLVED FIXED    
Severity: normal CC: kde, nate
Priority: NOR    
Version First Reported In: 6.3.4   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed/Implemented In: 6.4
Sentry Crash Report:
Attachments: Screenshot of the bug (extracted from a gpu-screen-recorder video)

Description nyanpasu64 2025-04-25 04:34:09 UTC
Created attachment 180627 [details]
Screenshot of the bug (extracted from a gpu-screen-recorder video)

SUMMARY
When I press Win+Shift+PrintScr or initiate a rectangular region screenshot from the program GUI, then hold shift to zoom into pixels around the cursor, the magnifying glass is blurred (every pixel is blended from a 2x2 region of the screen).

STEPS TO REPRODUCE
1. Press Win+Shift+PrintScr to initiate a rectangular screenshot.
2. Hold Shift and move the mouse. (The magnifying glass does not appear or disappear by itself; is this a bug?)

This issue occurs even on a single-monitor configuration without DPI scaling enabled.

OBSERVED RESULT
The contents of the magnifying glass are blurry. If I'm screenshotting a pixel checkerboard image, the preview shows a gray field no matter where I move the mouse.

EXPECTED RESULT
The contents of the magnifying glass are sharp.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 41
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.13.0
Qt Version: 6.8.2
Kernel Version: 6.13.11-200.fc41.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-3570K CPU @ 3.40GHz
Memory: 7.6 GiB of RAM
Graphics Processor: Intel® HD Graphics 4000
Manufacturer: M&A Technology
Product Name: DB75EN__

ADDITIONAL INFORMATION
Comment 1 Nate Graham 2025-04-25 11:30:02 UTC
This seems to be fixed in Plasma 6.4