why does this display of a mask fail? if I change the point to 0@0 it does not fail

See code below. Why does this display of a mask fail (get
primitiveFailed)?  If I change the point for the at: to 0@0 it does not
fail.  Is there a way to make the display succeed?  Maybe by  making a
smaller mask of just the area that is to be displayed?


sw := ScheduledWindow model: nil label: 'atest' minimumSize: 300@300.
sw open.
gc := sw graphicsContext.
aMask := Mask extent: 11534 @ 58589 on: Screen default.
gc displayMask: aMask at: (-9683@-36682).



Running vw7.3.1 on Solaris or Linux.


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IIRC it is because the at: point is outside the range VW can deal with
(32767?). There was some discussion a little while back about whether
that range limitation need still be there - it was implied from some X
header file.

Steve

> -----Original Message-----
> From: [hidden email] [mailto:[hidden email]]
On
> Behalf Of Mark Ballard
> Sent: 03 July 2006 10:35
> To: [hidden email]
> Cc: Venkatraj, M; Mark Ballard
> Subject: why does this display of a mask fail? if I change the point
to
> 0@0 it does not fail
>
> See code below. Why does this display of a mask fail (get
> primitiveFailed)?  If I change the point for the at: to 0@0 it does
not