Re: XFree86 5.0 TODO

Sven Luther writes:
 > On Fri, Mar 21, 2003 at 10:50:22PM +0100, Egbert Eich wrote:
 > > Sven Luther writes:
 > >  > > 
 > >  > > No, the model I have in mind is not window driven. The driver only
 > >  > > gets the information to zoom a part of the screen. It doesn't care
 > >  > > what is displayed there. Your application has the notion of a window.
 > >  > 
 > >  > What application are you speaking of here ? The window manager ? The
 > >  > specific app that own the window ? The configurator app ? A special
 > >  > zooming app ?
 > > 
 > > Your zooming application.
 > 
 > Ok, ...
 > 
 > Would it be possible for the zooming app to get feedback from the
 > windows manager when the window get moved, or maybe from the X server
 > directly ?
 > 

Not from the window manager. It would have to get an event from the 
Xserver.

 > > Yes. But the application could soom the window differently
 > > or whatever. The problem you would have generally is that
 > > you don't want to distort the aspekt ratio, therefore on
 > > a window not having the same aspect ration as you second
 > > head you'd have to display areas outside of the window, too.
 > 
 > Mmm, i think you can be more flexible here, you can choose not to
 > preserve the image ratio, or fill the outside areas with background
 > color, like what happens when you use a smaller resolution on a fixed
 > size LCD monitor for example. I am not all that sure if this would be
 > supported on all monitors, but some sort of clipping or something such
 > should be ok.

How do you want to fill the outside areas with the background color?
You are using same framebuffer for both viewports. This would
therefore have to happen in the hardware ie. the graphic chip.

 > > 
 > > OK. Great, I'm looking forward to have this feature.
 > 
 > Ok, but it will not be for the near future, as other things are higher
 > in my todo list.
 > 

I've been thinking about it: The entire window handling should be done
by the zooming app. The driver only gets coordinates (thru the
extension). This gives you more flexibility: You could zoom any
area of the screen - not just a window.

Egbert.