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1 files changed, 27 insertions, 0 deletions

diff --git a/sys/pmio/pmempty.x b/sys/pmio/pmempty.x
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+++ b/sys/pmio/pmempty.x
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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_EMPTY -- Test whether a mask is empty, i.e., contains no nonzero pixels.
+
+bool procedure pm_empty (pl)
+
+pointer	pl			#I mask descriptor
+
+bool	pl_empty(), pl_sectnotempty()
+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)
+
+	    return (!pl_sectnotempty (pl, v2, v4, PM_MAXDIM))
+
+	} else
+	    return (pl_empty (pl))
+end