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diff --git a/sys/gio/imdkern/imdfont.x b/sys/gio/imdkern/imdfont.x
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+++ b/sys/gio/imdkern/imdfont.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<gki.h>
+include	<gset.h>
+include	"imd.h"
+
+# IMD_FONT -- Set the character font.  The roman font is normal.  Bold is
+# implemented by increasing the vector line width; care must be taken to
+# set IMD_WIDTH so that the other vector drawing procedures remember to
+# change the width back.  The italic font is implemented in the character
+# generator by a geometric transformation.
+
+procedure imd_font (font)
+
+int	font			# code for font to be set
+int	pk2, width
+include	"imd.com"
+
+begin
+	width = IMD_WIDTH(g_kt)
+	pk2   = GKI_PACKREAL(2.0)
+
+	if (font == GT_BOLD) {
+	    if (width != pk2) {
+		call idk_linewidth (g_out, 2)
+		width = pk2
+	    }
+	} else
+	    call idk_linewidth (g_out, nint (GKI_UNPACKREAL(width)))
+
+	IMD_WIDTH(g_kt) = width
+end