[RFC] Implementing Wayland Security Module

[Bill Spitzak]

On 03/11/2015 10:55 AM, Jasper St. Pierre wrote:
> How would a game change the mode in the first place? There is no request
> to do so.

I think the compositor is allowed to change the mode if it thinks that 
is the best way to enlarge a fullscreen buffer to fill the screen. But 
this just means it is the same as the fullscreen request.

I still think the best way to avoid this is that compositors must allow 
other windows to be atop the fullscreen one, and the fullscreen client 
cannot block every method of getting another window on top (ie something 
like Alt+Tab continues to work). If the fullscreen window changed the 
mode then raising another window resets the mode to normal and displays 
the fullscreen window by scaling instead.

To handle "panels" you must abandon the idea of "layers" (at least for 
windows, panels, and fullscreen windows). Instead, place the panel below 
the lowest fullscreen window, and if there are no fullscreen windows the 
panel is placed above all windows. If the command to fullscreen also 
does a "raise" then the behavior is almost identical to current systems.