>> It is still
>> useful over slow links, but it increases the server CPU load
>> and thus slows
>> down overall frame rate over a good link.
>This is only true on Windows VNC servers. A VNC server on a Unix box has no
>overhead other than the memory and CPU requirements of the programs run via
>a VNC session.
The CPU load I was referring to was the load required to convert a 16bit or
higher screen into an 8bit screen for a viewer that has requested one.
That is a CPU overhead regardless of platform. It doesn't matter where the
highcolor pixels came from, it still takes time to shift, mask, and repack
the color components. If you are the only user, or if all users are going
to request 8bit transfers, it is much more efficient to make the server be
8bit native. If running WinVNC, just set the desktop depth to 8bit. If
running an Xvnc server, specify "-depth 8 -cc 3". It is useful to add the
"-cc 3" option to increase application compatibility. Otherwise you get
8bit truecolor, which a lot of programs don't understand.
>If VNC server could hook Windows DRI calls, PcAnywhere, TS, and Citrix would
>go out of business.
I heartily agree. I believe Wez is examining some methods for doing this
hooking. The list was pretty active a month or so ago with different ideas
for how to do so. Another thing to remember when comparing Citrix and TS
to VNC is that they only run on NT/2000 boxes. Those systems have clean
hooks into the video stream (which VNC could use, and may already be
using). Win98 and the other "personal" systems have rather hackish,
undocumented methods of doing similar work. I continue to hold out hope
for a breakthrough.
Mac
_____________________________ /"\
Mac Reiter \ / ASCII Ribbon Campaign
Nomadics, Inc. X Against HTML Mail
[EMAIL PROTECTED] / \
---------------------------------------------------------------------
To unsubscribe, send a message with the line: unsubscribe vnc-list
to [EMAIL PROTECTED]
See also: http://www.uk.research.att.com/vnc/intouch.html
---------------------------------------------------------------------
