Negotiating server screen size

[Corne Beerse]

Christophe Lohr wrote:
> Hi,
>   Is it possible for the client to negotiate server screen size?
>   
Yep, but keep in mind that the terms client and server might have a 
different location than you think. And then, it might even not. To avoid 
problems with the terms, its better to use the terms viewer and service.

> Of course, while connecting to a running server there may be nothing to
> negotiate...
>   
Some current display systems can change the resolution on the fly hence, 
something might be possible here. For example msWindows remote desktop 
pointing to a remote XP system can change the resolution on the fly.
> However, while connecting to a pending server (e.g. in inetd mode), it
> could be pleasent for the client to choose the screen size, isn't it?
>   

If you are speaking of a inetd implementation of vnc, there it is 
possible to pick the resolution (and colordepth) since ages. The first 
configuration of vnc in combination with inetd I have seen (over 10 
years ago) already provided this choice. There it was the portnumber 
that set the resolution and colordepth. By head it was (roughly) as follows:

The inetd configuration has a line to start Xvnc for the next combinations:
port 5950 starts xvnc with 640x480, 8 bits color
port 5951 starts xvnc with 640x480, 16 bits color
port 5952 starts xvnc with 640x480, 24 (or 32?) bits color
port 5960, xvnc 800x600, 8 bits
port 5961, xvnc 800x600, 16 bits
port 5962, xvnc 800x600, 24 bits

Or use the next scheme
8 bits:
5950 640x480
5951 800x600
5952 1024x768
5953 1200x1024
16bits:
5960 640x480
5961 800x600
5962 1024x768
5963 1200x1024
24/32 bits:
5970 640x480
5971 800x600
5972 1024x768
5973 1200x1024


In the end, using the 59xx series let you use vncviewer with both 
display numbers (50, 51, 52...) and portnumbers.


CBee