[Wayland-bugs] [Bug 101193] XWayland does not support scaling

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101193

--- Comment #6 from Jonas Ådahl <jadahl at gmail.com> ---
(In reply to Pekka Paalanen from comment #5)
> (In reply to Jonas Ådahl from comment #4)
> > What about changing modes not only for the resolution, but for selecting a
> > different framerate, or a mode with a different flag such as interlaced?
> 
> Given that we don't even have a solution for Wayland native clients, it's a
> bit hard to see how Xwayland should be mapped there.

I think it'd make sense to come up with a native Wayland client solution can
work with Xwayland too, just as with pointer locking vs pointer warping
emulation.

> 
> The first idea coming to mind would be to associate the RandR chosen mode
> with *all* Xwayland windows, perhaps with some per-output heuristics, and
> let the Wayland window manager do the same standard magic it would do with
> native Wayland windows.
> 
> That is purely because X11 has no per-window video mode thing, so Xwayland
> cannot know which window a setting should apply to.

Just as with pointer locking. We simply try to guess what window. I guess for a
video mode changing client, we could figure out what window should trigger a
fullscreen based temporary mode by matching the client setting the mode, with a
window that has the same size and position covering the whole monitor.

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