FreeLists / haiku-appserver / [haiku-appserver] Re: Backbuffer access

["Mikael Jansson (mailing lists)" <lists@xxxxxxxxxxxxxxxxx>]

Adi Oanca <adioanca@xxxxxxxxxxxxx>:
>
> Mikael Jansson (mailing lists) wrote:
> > Hello,
> > 
> > I'm sorry for not contributing much of anything, but I have a 
> > question:
> > In what way are you providing for a framework so that remote 
> > controlling through for example the VNC protocol can be made as 
> > fast as 
> > painlessly as possible?  Today that involves doing a memcpy() from 
> > the 
> > pointer received from a BWindowScreen at a high rate, but this 
> > scheme 
> > could be vastly improved if the background buffer used for drawing 
> > could be shared and apps could subscribe to update messages, or 
> > through 
> > other means.
> 
>       Don't know... we'll think about that.

> 
>       Regarding the backbuffer, it appears it can be avoided...
> 
Okay, sure, as long as it'll be possible to get at the contents at the 
same rate as they're being updated by the app_server. In Windows, the 
VNC servers are very fast. What does Windows do that makes it that much 
better for remote desktop-style apps? Maybe that could be a source of 
inspiration.  I suppose looking at the sources for any Windows VNC 
server would suffice.

--
Mikael Jansson
http://mikael.jansson.be