Re: New version of synchronization changes - windows not redirected

[Adel Gadllah <adel gadllah gmail com>]

Am 05.04.2013 05:15, schrieb Karl Tomlinson:
> Thank you, Owen and the others who contributed, for sorting this
> out and writing it up in a way we can follow.
>
> I'm pleased to see this even addresses the issue of synchronizing
> drawing after map, which could have been handled by the basic
> frame counter in _NET_WM_SYNC_REQUEST_COUNTER but wasn't. [1]
>
> I have a question re fullscreen windows:
>
> With extended synchronization, the application does not need to
> double-buffer its drawing, and so can use a window with a
> single-buffered visual.
>
> Some window managers disable compositing for fullscreen windows.
> Should an application assume that a window manager advertising
> _NET_WM_FRAME_DRAWN will always composite the window?
No the spec does not mandate that and mutter does not do that.
> Perhaps it
> should use _NET_WM_DONT_BYPASS_COMPOSITOR?
Yes if you want to be composited just set that.
Note the spec got updated you have to set _NET_WM_BYPASS_COMPOSITOR to
2 to say "always composite me". See: http://cgit.freedesktop.org/xdg/xdg-specs/tree/wm-spec/wm-spec.xml#n1581

Adel