(macOS) "Ghost content" with non-native fullscreen

[qwerasd205]

Running on macOS Sequoia, with the following config:

background-opacity = 0
macos-non-native-fullscreen = visible-menu
fullscreen = true
window-save-state = always

If I have some information displayed on screen, switch to another space, come back, then clear my screen I get some ghost display from the previous data. I need to exit full screen mode to remove the ghost writing or switch space again. It happens in every split. See attached

Originally posted by @kTag in #5674

Note

Looking closely it seems the compositor is applying some sort of drop shadow effect to the contents with non-native-fullscreen set like that, and it's only updating when switching spaces.

Idk off the top of my head what the correct solution is here - probably some way to signal to the compositor that the contents have changed in a way that the shadow needs to be recomputed - but it's well scoped enough to be turned in to an issue at this point.

[utensil]

Setting macos-window-shadow = false will make this issue go away completely, per my test. See https://ghostty.org/docs/config/reference#macos-window-shadow .

[qwerasd205]

That's a useful hint- we should disable the shadow while non native fullscreen is active, which should fix this.

[00-kat]

I know basically nothing about this topic, but somebody else had this exact same issue with the exact same resolution at #7199, except they were not using the non-native full-screen; this issue may perhaps not be limited to the non-native full-screen.

[mitchellh]

Hm. Maybe related to window shadows with any kind of transparency.