Special use cases

Wlroots

Compositors based on wlroots should have LayerShell functionality, allowing Discover to Just Work^TM

Wayland

Wayland without wlroots (Gnome,Plasma,Weston) removes or underimplements several features that are used to create this overlay, notably:

• Input shapes / click through. Some compositors fare better at this than others
• Set above windows. This can't be enforced by the app itself
• Borderless. Some compositors add a border despite requesting unbordered.
• Custom position. This is not part of wayland spec.

Plasma

Input shape is ignored thus cannot click through. Settings allow forcing borderless & above

Wayland via XWayland

GDK_BACKEND=x11 discover-overlay

Using the compatability layer fixes a few of the above issue.