🚀 go-pugleaf

In article <BzB14n.5xJ@undergrad.math.waterloo.edu> bobbyc@surya.UWaterloo.CA 
(Bobby Chawla) writes:
> Could someone tell me how to draw a line on the SGI Indigos in 
> Exclusive-Or mode?  
>
> I would like to draw lines, and if the user does not require them,
> then be able to erase them efficiently.
>
> I was looking at the documentation and could not find it anywhere :-(.
>

Try:
logicop(LO_XOR);

As is usually the case with useful functions like logicop and pixmode
some machines just dont support it.  The Indigo is okay though.


[From logicop(3G)]

     This routine does not function on IRIS-4D B and G models, nor does it
     function on early serial numbers of the Personal Iris.  Use gversion to
     determine which type you have.

     Some IRIS-4D GT and GTX models do support this routine.  Use getgdesc to
     determine if logicop is supported.

BUGS
     Personal Iris models do not support logical operations in combination
     with non-solid patterns nor with zoomed pixel writes or copies.  When
     either of these features is selected, the default logical operation,
     LO_SRC, will be used regardless of the value passed to logicop.



Question:
Once OpenGL is implemented will more of these functions be supported
for ALL machines, or are the old GT's just gonna have to use old software?

-Tom Benoist
 benoist@netcom.com