>># 
>># Copyright 1990, 1991 by the Massachusetts Institute of Technology and
>># UniSoft Group Limited.
>># 
>># Permission to use, copy, modify, distribute, and sell this software and
>># its documentation for any purpose is hereby granted without fee,
>># provided that the above copyright notice appear in all copies and that
>># both that copyright notice and this permission notice appear in
>># supporting documentation, and that the names of MIT and UniSoft not be
>># used in advertising or publicity pertaining to distribution of the
>># software without specific, written prior permission.  MIT and UniSoft
>># make no representations about the suitability of this software for any
>># purpose.  It is provided "as is" without express or implied warranty.
>># 
>># $XConsortium: stplnmsk.m,v 1.5 92/06/11 16:19:07 rws Exp $
>># 
>>#      SCCS:  @(#)  EAll.mc Rel 1.5	    (3/12/92)
>>#      SCCS:  @(#)  EGC.mc Rel 1.5	    (10/25/91)
>>#
>>TITLE XSetPlaneMask CH05
>>ASSERTION A XSetPlaneMask-1
A call to XSetPlaneMask sets the plane_mask component of
the specified GC to the value of the plane_mask argument.
>>STRATEGY
Create window.
Create GC with bg = BlackPixel, fg = WhitePixel, plane_mask = 0.
Verify pixel at (0, 0) is bg with XGetImage and XGetPixel.
Set pixel at (0, 0) with XDrawPoint.
Verify pixel at (0, 0) is bg with XGetImage and XGetPixel.
Set plane_mask component of GC to AllPlanes with XSetPlaneMask.
Set pixel at (0, 0) with XDrawPoint.
Verify pixel at (0, 0) is fg with XGetImage and XGetPixel.
>>ASSERTION B XSetPlaneMask-2
When the server fails to allocate a required resource, then
a BadAlloc error occurs.
>>STRATEGY
Report UNTESTED
>>ASSERTION A XSetPlaneMask-3
When the GC argument does not name a defined GC, then a
BadGC error occurs.
>>STRATEGY
Create a GC.
Set GC id to -1 using XTestSetGContextOfGC.
Call test function using bad GC as the GC argument.
Verify that a BadGC error occurs.
