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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
include <pmset.h>
include <plio.h>
# PM_CLEAR -- Clear a mask. The entire surface is cleared. This is equivalent
# to a full surface pm_rop with rop=PIX_CLR, but is more convenient and can be
# implemented more efficiently since the entire surface is cleared.
procedure pm_clear (pl)
pointer pl #I mask descriptor
include "pmio.com"
begin
if (PM_MAPXY(pl) == YES) {
call amovkl (1, v1, PM_MAXDIM)
call imaplv (PM_REFIM(pl), v1, v2, PM_MAXDIM)
call amovl (IM_LEN(PM_REFIM(pl),1), v3, PM_MAXDIM)
call imaplv (PM_REFIM(pl), v3, v4, PM_MAXDIM)
call pl_rop (NULL, NULL, pl, v2, v4, PIX_CLR)
} else
call pl_clear (pl)
end
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