Trying to understand the server

[Laferriere, Bob (MED)]

I think I figured it out. Every second a timer fires to wake up the idle
desktop thread out of GetMessage(). Then it checks to see if the screen
has changed. If anything has changed, it sends an entire screen update?
Why not just send only what changed? Is this not possible to compute?

Thanks again,

-Bob


>-----Original Message-----
>From: Laferriere, Bob (MED) 
>Sent: Thursday, January 13, 2000 10:44 AM
>To: 'vnc-list "at" uk.research.att.com'
>Subject: RE: Trying to understand the server
>
>
>
>
>>-----Original Message-----
>>From: Jonathan Morton [mailto:chromi "at" cyberspace.org]
>>Sent: Thursday, January 13, 2000 12:09 AM
>>To: vnc-list "at" uk.research.att.com
>>Subject: Re: Trying to understand the server
>>
>>yes, a modem can be used sensibly, provided you keep the 
>>complexity of the
>>screen images down sensibly.  Try it and experiment :).
>>
>
>Right. I found information like this in the FAQ, but didn't know if
>anyone was trying to use a modem. I see decent results as long as I am
>not moving windows around quickly.
>
>>with WinVNC is that it needs to manually check the screen for 
>>updates as
>>well as listening to Windows, which slows the actual server 
>down rather
>>than the encoding.
>
>Could you elaborate on this for me. Please pardon my Windows ignorance.
>I did some code walkthroughs and see that a Timer is set to fire every
>second. Is this the screen update checking to which you are referring?
>Can Windows tell you that a portion of the screen is dirty and needs
>updating? I thought that updates were triggered by mouse and 
>kb events? 
>
>Thanks again,
>
>-Bob
>
>
>>
>>--------------------------------------------------------------
>>from:     Jonathan "Chromatix" Morton
>>mail:     chromi "at" cyberspace.org  (not for attachments)
>>uni-mail: j.d.morton "at" lancaster.ac.uk
>>
>>The key to knowledge is not to rely on people to teach you it.
>>--------------------------------------------------------------
>>Contributing to the VNC Project - http://www.uk.research.att.com/vnc/
>>Ask me for Macintosh VNCserver v3.3.2 beta2.1
>>v3.3.2 beta 2.2 due out soon!
>>
>>
>>
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