Client/Protocol feature question

[Tristan Richardson]

Will Dean <will.dean "at" industrial.demon.co.uk> writes:

> At 19:36 07/02/2000 +0000, you wrote:
> 
> >The most significant bandwidth-usage improvements, I think, are:
> >1) client double-buffering
> 
> Absolutely - on 'resource unlimited' clients, I can't see any good reason 
> not to do this.  I think the X client is the only one which doesn't do this.
> 

Several people have said this about the X viewer.  It's not true.

The X viewer sets the "backing store" attribute of its window, which means that
the X server saves its contents for you.  This can be turned off at run-time if
you like with a resource setting, but by default it's on.  Only if the X server
can't support this feature does it fall back to requesting screen data from the
VNC server.  Every normal X server (i.e. one based on the MIT sample server)
supports backing store.

Cheers

Tristan

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Tristan Richardson   tjr "at" uk.research.att.com   www.uk.research.att.com/~tjr
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