Bug 435711

Summary: Fuzzy text merged output (Hi-DPI display)
Product: [Applications] kdiff3 Reporter: vlovich
Component: applicationAssignee: michael <reeves.87>
Status: RESOLVED DUPLICATE    
Severity: normal    
Priority: NOR    
Version First Reported In: 1.8.5   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Screenshot showing just the merged output is blurry/fuzzy.

Description vlovich 2021-04-14 02:27:50 UTC
Created attachment 137575 [details]
Screenshot showing just the merged output is blurry/fuzzy.

SUMMARY
In case this impacts anything, I have 2 4k Hi-DPI monitors connected to my laptop through a TB3 dock (the laptop monitor itself is also 4k Hi-DPI). The merge output window has blurry text whereas A/B/C windows are crisp. This applies in 2-way & 3-way diffs.

STEPS TO REPRODUCE
1. kdiff3 -m 1.txt 2.txt 3.txt

OBSERVED RESULT
Merged output is blurry. Additionally spaces are represented as dots (not sure if the latter is intended - I had thought so but I also haven't found any config option to turn it off).

EXPECTED RESULT
Text in merged output is as crisp as it is in the original content views.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kernel 5.10.28-1LTS
(available in About System)
KDE Plasma Version: 5.21.4
KDE Frameworks Version:  5.80.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
GPU: Intel CometLake UHD Graphics & Quadro T2000. Both Intel & Nvidia (under Prime) exhibit this issue.
Display global scale: 200%
Monitors: 2 external 27" @ 3840x2160, laptop @ 3840 x 2400.

PLASMA_USE_QT_SCALING=1 doesn't impact anything.
Comment 1 michael 2023-01-22 18:31:55 UTC
Does this still happen WITH QT_ENABLE_HIGHDPI_SCALING set 1 if not I know what's going on.
Comment 2 michael 2023-01-26 21:25:35 UTC
J
Comment 3 michael 2023-02-12 19:17:25 UTC

*** This bug has been marked as a duplicate of bug 447900 ***