[Wayland-bugs] [Bug 99318] xwayland lets apps see the whole screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99318

--- Comment #1 from Pekka Paalanen <ppaalanen at gmail.com> ---
Which compositor did you test this on?

According to my understanding of how Xwayland works, Xwayland never has access
to the whole screen, unless that whole screen is made of X11 windows. We do not
have a mechanism to forward native Wayland window contents to Xwayland and to
X11 apps AFAIK, unless the compositor goes out of its way to push the
composited image back to Xwayland as well as to screen.

Someone might argue, that X11 screen capturing should continue to work with
Xwayland, catching also Wayland apps, so maybe they did it on purpose?

On Weston, X11 apps should not see any Wayland windows ever. It'll be a while
before I can test myself, though.

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