[comp.sys.sgi] gr_osview bug

lmo@lsr-vax.UUCP ("Lance M. Optican - LMO") (02/01/91)

I have noticed a subtle bug in the display of gr_osview.  If a window
overlays part of the gr_osview display on the right side (so that
the gr_osview window sticks out on the left), moving "strip chart" type
displays turn black!

This is not a serious bug, but perhaps sgi would like to know about
it for Irix 4.0!

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   Lance M. Optican			      | uunet.uu.net!lsr-vax!lmo 
   Laboratory of Sensorimotor Research	      | lsr-vax!lmo@uunet.uu.net
   National Eye Institute, NIH, Bethesda, MD  |	(301) 496-3549    
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milt@sgi.com (Milton Tinkoff) (02/02/91)

In article <9101311809.AA12561@> lmo@lsr-vax.UUCP ("Lance M. Optican - LMO") writes:
>
>I have noticed a subtle bug in the display of gr_osview.  If a window
>overlays part of the gr_osview display on the right side (so that
>the gr_osview window sticks out on the left), moving "strip chart" type
>displays turn black!
>
>This is not a serious bug, but perhaps sgi would like to know about
>it for Irix 4.0!

This is documented in the man page:

BUGS
     When using a strip chart display, and some other window obscures part of
     the strip chart, the bar will gradually turn to black.  This is because
     an in-framebuffer copy operation is used to make the strip appear to
     move, and when part of the window is obscured there is nothing to copy.
     It is not clear that this bug will ever be fixed, because of the
     performance advantages of this style of update.


--
-------------------------------------------------------------------------------
Milt Tinkoff				|	"Too much is always better
Silicon Graphics Inc.			|	     than not enough."
milt@waynes-world.esd.sgi.com		|