On Thu Jun 11 18:12:10 2026 +0000, Julian Orth wrote:
There are several compositors that implement the spec wording as written, i.e. they only apply the alpha factor to the surface. I do not see any indication in the spec that it is supposed to apply to subsurfaces as well. A change in wording would therefore require at least a new protocol version or, rather, a flag that indicates which mode the client wants and which modes the compositor supports. Since many compositors simply won't be able to implement the subsurface variant without significant changes. Looks like Wayland protocols has some work to do then. Not sure if this should block the merging of this MR though
-- https://gitlab.winehq.org/wine/wine/-/merge_requests/11119#note_142872