On Wed, 24 Oct 2001, Dr Andrew C Aitchison wrote:
> On Tue, 23 Oct 2001, Mark Vojkovich wrote:
>
> > On Tue, 23 Oct 2001, Matt Wilbur wrote:
> >
> > > Hi all,
> > >
> > > Does anyone know if there's plans to make pseudocolor visuals available in
> > > modes > 8 bit? We're saddled with some grotty old apps (saoimage, for
> > > one) that still work great, provided you display them to an X server that
> > > supports pseudocolor visuals in 24 bit mode... but that excludes XFree86
> > > currently. IRIX's X server and Exceed7 on LoseNT boxes seem to do OK, and
> > > it looks like AccelX claims to, but we'd sure like to do this on XFree..
> >
> > I don't know that there are any plans to hack this. It's not
> > worth the effort in my opinion. It's a mess and the problems are
> > with the apps, not the server. It's a TrueColor world.
>
> Doesn't the RandR extension give us multiple simultaneous depths ?
I'm not sure about that.
> Matt, only a few drivers support it so far (check the archives for which
> ones). IIRC one of the generic drivers does work, so you can run the
> extendision on most cards, if you don't mind loosing acceleration.
>
> While I don't know of any plans, and I agree that the app is indeed the
> problem, I think the hack to implement PseudoColor on DirectColor should
> not be too hard - at depth 24 the two visuals are just different ways of
> interpreting the colormap.
You have to do it with shadow buffers for every depth 8 window.
Whenever you change the palette you have to redraw (retranslate) the
8 bit data. You won't pass the test suite if you can't read back
the 8 bit data you've just written. In theory you could have any
number of PseudoColor maps though.
> I have thought of adding this to xnest, so that it would be available
> to every driver, but not get in the way of ordinary users - once
> you use pseudocolor you will see why most people are better off without
> it.
Mark.
_______________________________________________
Xpert mailing list
[EMAIL PROTECTED]
http://XFree86.Org/mailman/listinfo/xpert
