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[BUG] Qt 6 glitchy font rendering on Windows #3310

@o-l-a-v

Description

@o-l-a-v

With QOwnNotes v25.7.1 on Windows 11 24H2, I notice some font rendering issues, seems to happen on headings only, only on some zoom levels.

I use "Cascadia Mono Light" TTF as both default font and code font.

Here is a screen recording, look at H1.

20250703-0957-36.1006123.mp4

Screenshot from zoom level that looks OK

Image

Screenshot from zoom level where it shows

Image

Even worse at more zoom

Image

Expected behaviour

Font should render nice.

Actual behaviour

Font renders glitchy.

Steps to reproduce

See video.

Screenshots

If applicable, add screenshots to help explain your problem.

Output from the debug section in the settings dialog

If this is important I can spin up a test VM, I don't want to share this raw debug info from my personal computer.

Relevant log output in the Log panel

Not relevant?

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