basic RandR support in Xvnc (resize) and uvnc

[redge]

basic RandR support in Xvnc (resize)

The Xrandr extension is the modern interface that X servers offer for configuring output devices such as monitors, projectors, LCD screens, etc. Modern desktops should take advantage of this interface to improve the way they handle display configuration and hotplugging.

* GTK+ needs to use Xrandr instead of the older Xinerama extension to obtain information about screen geometry and other relevant monitor information. A prototype patch for this has been produced during this years Google Summer of Code, and has been committed to GTK+ trunk after some further tweaking. See #439588

* The screen resolution capplet needs to be rewritten on top of Xrandr. Bryan Clark has done some initial design work on this. Ideally, system-config-display can get folded into this, too.

* The desktop, in particular the window manager, should be aware of the logical vs. physical screen distinction. This means that it should be possible to treat two monitors as one desktop with the panels stretching all the way across, or have the desktop on one monitor with the projector being used for a presentation.

reference
https://fedoraproject.org/wiki/Features/RandrSupport