Font rendering issue

[tsoernes]

Fedora 40
Zeal 0.7.1-dev

[trollixx]

Unfortunately, I have no idea what is going on. Too many variables at play. Do you see any errors printed when you run Zeal from command line?

[tsoernes]

qt.qpa.wayland: eglSwapBuffers failed with 0x300d, surface: 0x0

It runs wayland, Intel graphics if that matters.

[jan-schreib]

As a workaround you can use QT_SCALE_FACTOR_ROUNDING_POLICY="RoundPreferFloor" to fix the fonts.
In your terminal:

$ QT_SCALE_FACTOR_ROUNDING_POLICY="RoundPreferFloor" zeal

I added that setting to the env variables in the .desktop file. (via the KDE gui). It now works permanently.

@trollixx

[trollixx]

The need to configure environment variables indicates that Qt's platform plugin is not doing its job. Unless there's a way to detect improper rendering automatically, at most we can only add these instructions to docs.