Winit example crashes on wayland with dpi scaling

[TXPGhost]

The winit example crashes on my system (running GNOME under Wayland) with the following error:

wl_surface#25: error 2: Buffer size (1748x45) must be an integer multiple of the buffer_scale (2).

It seems to have something to do with the window decoration, since adding .with_decorations(false) to the window builder seems to be a workaround (or alternatively, by adding borderless: true to the WindowSettings when creating a three_d::Window). The size (1748x45) seems to suggest the issue lies with the window decorations.

The issue is also fixed by using 100% UI scaling rather than 200% (changed in the GNOME settings menu).

The crash seems to occur on line main.rs:73 of the winit_window example while the buffers are swapped.

context.swap_buffers().unwrap();

I also tested the eframe and pixels crates under the same conditions, and they were able to run fine, suggesting the issue is not upstream. Any ideas what may be causing this?

[asny]

Hmm. I think the error message is pretty clear, the window surface size needs to be a multiple of 2. 45 is not a multiple of 2. So just ensure that the window size is a multiple of 2 and your good. Alternatively, you can handle the error in the line context.swap_buffers().unwrap(); instead of unwrapping. Or any of the other workarounds you suggested.

Anyway, since three-d is using winit and winit returns an error in this case which is also returned by three-d, and which you can just handle yourself, I don't really see what needs to be changed?

[khdlr]

I have the same issue on GNOME when running any of the examples on a 150% (or 200%) scaled screen. Changing the window size doesn't seem to help, the height of the problematic buffer will always be 45.

Interestingly, this issue seems to be specific to GNOME, the same app runs on the same machine when booted into KDE Plasma. This leads me to believe that the issue is somewhere in the interfacing with GNOME's client side decorations (cf. https://github.com/rust-windowing/winit/blob/master/src/platform/wayland.rs), even though it is not clear to me where the 45 pixel high buffer is actually instantiated.