Native GDI

[Robert Collins]

> -----Original Message-----
> From: Alan Hourihane [mailto:alanh@fairlite.demon.co.uk] 
> Sent: Monday, April 08, 2002 6:05 PM
> To: cygwin-xfree@cygwin.com
> Subject: Re: Native GDI
> 
> 
> On Mon, Apr 08, 2002 at 04:03:40 +1000, Robert Collins wrote:
> > Just a question: how does X cope with region invalidate - 
> say with the 
> > Xnest engine? I'm wondering how the native GDI engine will handle 
> > having regions invalidated by win32 apps in front of it, without an 
> > off-screen buffer.
> > 
> I believe WM_PAINT is our friend here. Then we can issue the 
> X calls inside the server to repaint the region(s).

Yes, that's the mechanics of getting alerted... but unless we have a
backing store, we need to issue Expose events to the X clients (which is
a potential performance issue).

Rob