xfwm4 + compositor

[Brian J. Tarricone]

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Hey Olivier,

I finally upgraded my 6-year-old video card to something a bit more
recent (nvidia GeForce FX5700LE, if you're looking for data points), and
the compositor is great!  Things do overall feel a bit less 'snappy',
but I suppose that's to be expected.  They eye-candy is fun, and I love
being able to have translucent panels.  move_opacity is really cool,
though resize_opacity is a bit too slow for my taste.

So... just wanted to say it rocks ^_^.

Also, I was thinking about something.  When you're using a compositor,
the entire desktop is drawn to an offscreen pixmap, essentially a type
of double-buffering (yeah?).  In addition, GTK does double-buffering of
most widgets by default, essentially giving you "triple-buffering",
which is probably a bit of a waste.  Obviously we can't turn off D-B in
all GTK apps, but would it make sense to bug the GTK guys about a way to
do this?  If I'm thinking this through properly (and I may not be), I
imagine this might be a way to make the compositor's performance hit a
bit less severe.

	-brian

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