| Summary: | Colorblindness Correction effect causes blurs on a 1.25x/1.75x scaled screen | ||
|---|---|---|---|
| Product: | [Plasma] kwin | Reporter: | bene.danika |
| Component: | effects-various | Assignee: | KWin default assignee <kwin-bugs-null> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | madness742, mobile.harvey, nate, postix, stefanspr94, xaver.hugl |
| Priority: | NOR | Keywords: | accessibility, qt6 |
| Version First Reported In: | 6.0.1 | ||
| Target Milestone: | --- | ||
| Platform: | Arch Linux | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
| Attachments: | Colorblindness Correction off (sharp) vs on (blurry). | ||
Hi - thanks for reporting this. I can also duplicate this on my stock Neon installation but the effect is slightly less obvious than in your screenshot. However I do also see things get a little bit blurry at any scaling setting (i.e. 100%, 125%, and 150%). I'm no expert in how the colorblindness is implemented but since it is possible the blurriness might negate the benefits of enabling the colorblindness setting I'll mark this as CONFIRMED and hope a dev can take a look and comment at a more technical level. Thanks Nick Possibly related: https://bugs.kde.org/show_bug.cgi?id=483224 Please fix! This breaks customization for every Plasma 6 user with fractional scaling, especially since being able to scale via specifying font DPI as a workaround isn't available anymore. Can't reproduce on master with 160% and 125% scale. Does this still happen for you in 6.3+? (In reply to Zamundaaa from comment #3) > Can't reproduce on master with 160% and 125% scale. Does this still happen for you in 6.3+? All good now. It wasn't just the colorblindness correction. AFAIK 6.3.2 partially and 6.3.4 fully fixed this by changing how elements are aligned to the pixel grid and now it's working beautifully. Blur was the result of misalignment on x,y or sometimes both axes simultaneously, depending on specific user circumstances. It was this change, along with the fractional scaling overhaul that solved it: https://invent.kde.org/plasma/kwin/-/merge_requests/7340 https://invent.kde.org/plasma/kwin/-/issues/257 |
Created attachment 166791 [details] Colorblindness Correction off (sharp) vs on (blurry). SUMMARY When using fractional scales 1.25, 1.75 or anything else not divisible by 0.5 (1.0 and 2.0 work, 1.5 also interestingly works), and having the Colorblindness Correction desktop effect enabled, floating windows become blurry. STEPS TO REPRODUCE 1. Display & Monitor -> Scale: 125% or 175%. 2. Desktop Effects -> enable Colorblindness Correction. OBSERVED RESULT Floating windows become visibly washed out on-screen. EXPECTED RESULT Floating windows remain as sharp as they are with the effect disabled. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux (available in About System) KDE Plasma Version: 6.0.1 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2 ADDITIONAL INFORMATION Fullscreen windows and panels(?) are interestingly unaffected by this.