VNC server based on kdrive using damage extension?

Mon, 26 Jan 2004 14:17:53 -0500

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We would like to build a lightweight X server which will operate "headless".
The only display device will be a remote VNC device. In other words, the
result would be similar to the xf4vnc project at sourceforge, but based on
freedesktop.org X server technology rather than XFree86 4.  We would be
willing to undertake all of the development, but are looking for some
architectural guidance. We would of course do this as an open-source
project.

What should we start with as a base? Is there a "new"  X server similar to
the old Xvfb server? Or should we use something like Xvfb, but create a
"dummy" frame buffer device?

Or, should we just run a standard X server (e.g. kdrive) , and handle VNC
via a compositor-like application which tracks damage regions (via the
damage extension) and sends them via the VNC protocol? In this case, we
wouldn't need to modify the server at all; a special compositor application
would handle VNC.

Note: are running an embedded GTK application, so we need enough X support
to handle at least that. We'd also like to be able to rotate the X display,
which kdrive can do but our current solution (xf4vnc) cannot. Transparency,
anti-aliased text, and other eye-candy is also desirable.

Thanks for any guidance you can provide.

Bruce Bauman
WorldGate Communications, Inc.

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<div class=3DSection1>

We would like to build a lightweight X server which =
will
operate "headless". The only display device will be a remote VNC
device. In other words, the result would be similar to the xf4vnc =
project at sourceforge, but based on freedesktop.org X =
server technology
rather than XFree86 4. &nbsp;We =
would be
willing to undertake all of the development, but are looking for some
architectural guidance. We would of course do this as an open-source =
project.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

What should we start with as a base? Is there a =
"new" &nbsp;X =
server
similar to the old Xvfb server? Or should =
we use
something like Xvfb, but create a "dummy"
frame buffer device?<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

Or, should we just run a standard X server (e.g. =
kdrive) , and handle VNC via a compositor-like =
application
which tracks damage regions (via the damage extension) and sends them =
via the
VNC protocol? In this case, we wouldn't need to modify the server at =
all;
a special compositor application would handle =
VNC.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

Note: are running an embedded GTK application, so we =
need
enough X support to handle at least that. We'd also like to be able to
rotate the X display, which kdrive can do =
but our
current solution (xf4vnc) cannot. Transparency, anti-aliased text, and =
other
eye-candy is also =
desirable.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Thanks for any guidance you can =
provide.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><st1:PersonName><font size=3D2 face=3DArial><span
 style=3D'font-size:10.0pt;font-family:Arial'>Bruce =
Bauman</span></font></st1:PersonName><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></=
p>

<p class=3DMsoNormal><span class=3DSpellE><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>WorldGate</span></font></sp=
an><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>
Communications, Inc.<o:p></o:p></span></font></p>

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