xfwm4 compositor and the root pixmap.

Nick Schermer nick at xfce.org
Mon Nov 25 10:10:49 CET 2013

Haven't tried anything of this, but what if xfwm4 does not touch the bg
pixmap at all? Is that even possible.

IIRC X preserves the pixmap as well, so why have xfwm4 handle this?


On Fri, Nov 22, 2013 at 9:47 PM, Alistair Buxton <a.j.buxton at gmail.com>wrote:

> When using compositing, xfwm4 fills it's background with solid grey,
> and then drawing the user's wallpaper is left up to xfdesktop. That's
> all fine, except that there's a few seconds after xfwm4 starts and
> before xfdesktop starts where you can see the ugly grey. If your X11
> login screen already set the user's wallpaper this looks bad, as it
> goes grey, and then goes back to the correct image.
> Xfwm4 has some code inside MONITOR_ROOT_PIXMAP defines which is not
> normally enabled. This does two things: it copies any pixmap it finds
> at startup, and then it constantly monitors the root for changes.
> I think it would be a good idea to always copy the root pixmap on
> startup, to avoid the few seconds of grey, even if MONITOR_ROOT_PIXMAP
> is not defined. eg:
> https://github.com/ali1234/xfwm4/commit/b7baa7aa60cdb80759e0872d0ab5a7cb59ec5c10
> Also, the different atoms used by various software to control the
> RetainPermanent root pixmaps has many different possible names. Does
> it make sense to add these? As well as XROOTPMAP and XSETROOT it
> already checks, there is also _XROOTPMAP_ID and ESETROOT_PMAP_ID which
> all have exactly the same meaning as far as I can tell. It seems like
> it would be easy to add these, at least for the initial copy.
> What do you think about this?
> --
> Alistair Buxton
> a.j.buxton at gmail.com
> _______________________________________________
> Xfce4-dev mailing list
> Xfce4-dev at xfce.org
> https://mail.xfce.org/mailman/listinfo/xfce4-dev
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