1 files changed, 56 insertions, 0 deletions
diff --git a/sys/gio/sgikern/sgipm.x b/sys/gio/sgikern/sgipm.x
new file mode 100644
index 00000000..e53f3f03
--- /dev/null
+++ b/sys/gio/sgikern/sgipm.x
@@ -0,0 +1,56 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include <gki.h>
+include	"sgi.h"
+
+# SGI_POLYMARKER -- Draw a polymarker.  The polymarker is defined by the array
+# of points P, consisting of successive (x,y) coordinate pairs.
+
+procedure sgi_polymarker (p, npts)
+
+short	p[ARB]			# points defining line
+int	npts			# number of points, i.e., (x,y) pairs
+
+pointer	pm
+int	i, len_p
+int	x, y, oldx, oldy
+include	"sgi.com"
+
+begin
+	if (npts <= 0)
+	    return
+
+	len_p = npts * 2
+
+	# Keep track of the number of drawing instructions since the last frame
+	# clear.
+	g_ndraw = g_ndraw + 1
+
+	# Update polymarker attributes if necessary.
+
+	pm = SGI_PMAP(g_kt)
+
+	if (SGI_TYPE(g_kt) != PM_LTYPE(pm)) {
+	    call sgi_linetype (PM_LTYPE(pm))
+	    SGI_TYPE(g_kt) = PM_LTYPE(pm)
+	}
+	if (SGI_WIDTH(g_kt) != PM_WIDTH(pm)) {
+	    call sgk_linewidth (g_out, nint (GKI_UNPACKREAL(PM_WIDTH(pm))))
+	    SGI_WIDTH(g_kt) = PM_WIDTH(pm)
+	}
+	if (SGI_COLOR(g_kt) != PM_COLOR(pm)) {
+	    call sgi_color (PM_COLOR(pm))
+	    SGI_COLOR(g_kt) = PM_COLOR(pm)
+	}
+
+	# Draw the polymarker.
+	oldx = 0; oldy = 0
+	for (i=1;  i <= len_p;  i=i+2) {
+	    x = p[i]; y = p[i+1]
+	    if (x != oldx || y != oldy) {
+		call sgk_move (g_out, x, y)
+		call sgk_draw (g_out, x, y)
+	    }
+	    oldx = x; oldy = y
+	}
+end