Multiple active colormaps in X11 / was: Re: (resend?) "hello.c" needed

[Roland Mainz]

sergio on noip wrote:
> "that will allow using 12-bit pseudocolor on hardware that
> otherwise would not support it (as well as greyscales and other visuals
> other than real color).  This is a very important issue with my work.
> 
> Also, I believe I read that it will support "layers"(?)......overlays!
> The
> ability to combine images with different visualials, so I an have a
> photo
> using real color and have a gui control or whatever using 12-bit
> pseudocolor
> simultaneously.  I'm assuming this is also supported through software
> emulation."
> 
> Mesa supports visuals with pseudocolor, even gray scales, at least had
> supported. But X can only use one colorMap at same time, I think, and
> this experiences has been made on year 1995/96. ( to see one photo on
> gray-scale, all window becomes in gray scale )

An Xserver can have multiple active colormaps, at least Sun's XVR-1000
and XVR-4000 cards support three active colormaps and AFAIK Egbert
Eich's PseudoColor emulation layer supports MAXCLIENTS-1 active
colormaps.

----

Bye,
Roland

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