surprise with APPCULLDRAW and MCO

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Mark Young (mjy++at++eos.arc.nasa.gov)
Wed, 21 May 1997 17:55:09 -0700

Hi. 1st post from a Performer newbie.

I am experiencing an effect of a multiprocessing mode
that I didn't expect from my thin understanding of the system:

The DISPLAY environment variable is :0.1 (where my MCO viewports are).
I run a Performer application that intends to open a window
that overlaps some MCO viewports on display :0.1.
For all of modes of pfMultiprocess(mode) except mode=0
(PFMP_APPCULLDRAW), the window is opened in the expected place
(MCO output). For mode=0, the window surprises me by opening on
display :0 (no MCO output) disregarding the environment variable
(DISPLAY is still :0.1).

Can anyone explain what's happening to me? What do I need to
do differently to get MCO output with pfMultiprocess(PFMP_APPCULLDRAW)?
I want to shut off multiprocessing to cut back on latency.
I am using Performer 1.2 on a 4 cpu SkyWriter under IRIX 5.2
with two RM5 (one for the MCO).

Cheers,
Mark
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