Issue 3876: Fix shape of G clefs

This patch simplifies the code for the double G clefs; it also fixes the
incorrect test of the `double_shift' parameter that caused the non-double
G clefs being drawn twice.

Recent FontForge warnings like

  Internal Error (overlap) in clefs.G: Intersection failed!

or the ugly shape with a straight line instead of a curve in the left part
of the G clef are now gone: Drawing the shape twice triggered a bunch of
FontForge bugs.

1 files changed, 3 insertions, 23 deletions

diff --git a/mf/feta-clefs.mf b/mf/feta-clefs.mf
index d96f5f399d..3c762d6ee4 100644
--- a/mf/feta-clefs.mf
+++ b/mf/feta-clefs.mf
@@ -556,29 +556,9 @@ def draw_gclef (expr reduction, double_shift, extra_width) =
 
 	fill bulb;
 
-	if double_shift <> 1:
-
-		% transform helper points
-		for n := 106, 110, 111, 112, 121:
-			forsuffixes e := l,,r:
-				z[n+100]e = z[n]e shifted (double_shift * reduced_ss, 0);
-			endfor
-		endfor
-		for n := 110, 111:
-		        forsuffixes e := l,,r:
-				z[n+100]'e = z[n]'e shifted (double_shift * reduced_ss, 0);
-			endfor
-		endfor
-
-		fill swirl shifted (double_shift * reduced_ss, 0);
-		penstroke z221e
-		          .. z210e{down_}
-		          .. z210'e
-		          .. z206e
-		          .. z211'e
-		          .. z211e{dir (-95 + corr_angle)}
-		          .. z212e{dir (bot_angle_)};
-		fill bulb shifted (double_shift * reduced_ss, 0);
+	if double_shift <> 0:
+		addto currentpicture also
+		  currentpicture shifted (double_shift * reduced_ss, 0);
 	fi;
 
 	penlabels (range 101 thru 121);