Re: Cygwin/X developement: -EMULATEPSEUDO

[Alan Hourihane <alanh at fairlite dot demon dot co dot uk>]

On Tue, Sep 14, 2004 at 04:58:45PM +0200, Alexander Gottwald wrote:
> On Tue, 14 Sep 2004, Sebastian Haby wrote:
> 
> > I started to try out Cygwin/X to remotely use a Solaris app, however, the 
> > app uses 8bpp Pseudocolor visual which is only
> > supported in Cygwin/X when running the windows desktop in 8bpp aswell or 
> > fullscreen, ie. the app works just fine in these two cases.
> > However I can't use any of these options and therefor need to get the 
> > -emulatepseudo option to work.
> 
> Unfortunatly there has been no activity in this field for some time and 
> after Harold left the project there is noone left with sufficient knowledge
> of the problem to start again. I can only try to outline my general knowledge  
> of the xserver internals.

I'll try to shed some light on this for you Alexander.

Basically the -pseudocolor mode in Cygwin/X doesn't work properly. Harold
added it to try and let applications that need pseudocolor to work, but
he also knew about the color problems. So it's nothing new that it
doesn't work properly.

Now, in the CVS in the trunk there are some new files called....

xc/programs/Xserver/fb/fbpseudocolor.[ch]

which is meant to add support for pseudocolor emulation, but executing
the wrapper function xxSetup(...) with the appropriate arguments.

Egbert Eich wrote this code, so he may be able to shed some more light
on it's usage pattern, but this is the way to go to fix the support
for Cygwin/X.

Alan.