Is Xvnc a X exension or X driver?
Zhang, Xing Z
xing.z.zhang at intel.com
Mon Apr 19 18:34:50 PDT 2010
Thank You Alan, you point out me a direction for study.
> (I've cc'ed xorg-devel, since this is really much more of a developer topic than
> a user topic.)
> Zhang, Xing Z wrote:
> > Hi experts:
> > I am looking into code of tigervnc, the Xvnc contains a vnc X server which
> seems a X driver or extension ( it locates at
> VNC includes an X extension, but Xvnc itself is an X server using the hw/vnc
> layer. Originally X support for different hardware was delivered by having a
> different DDX layer for each, resulting in multiple different X servers and
> changing X servers to use different types. In the current code, the
> layer provides a common DDX layer for many types of hardware with loadable
> driver modules for each type, but there are still other DDX layers for other
> types of X server, such as Xvnc, Xvfb & Xnest, as well as the kdrive DDX layer
> which supports multiple har
Does hw/xfree86 layer allow people write a virtual server like Xvnc? Or we
should switch back to old DDX layer?
dware types using the older model of per-hardware
> X server binaries.
> > Could anyone point me a programming howto followed by above
> > I gone through documentations on X.org, but didn't find programming
> manual of such a extension/driver.
> There isn't a lot of up-to-date documentation on X server internals - not many
> people are interested in spending the huge amounts of time required to write a
> programming manual that less than 100 people will ever read.
> Documents that do exist (though not necessarily completely up-to-date):
> * Definition of the Porting Layer for the X v11 Sample Server:
> html: http://www.x.org/releases/X11R7.5/doc/core/Xserver-spec.html
> pdf: http://www.x.org/releases/X11R7.5/doc/core/Xserver-spec.pdf
> * The X Window System Server, Elias Israel, Erik Fortune,
> Digital Press, ISBN 1-55558-096-3, 1993.
> (X11R5 era, though some basic concepts are still unchanged)
> -Alan Coopersmith- alan.coopersmith at oracle.com
> Oracle Solaris Platform Engineering: X Window System
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