From 5d64257340eb6973c920986318984cbe15e5920e Mon Sep 17 00:00:00 2001
From: Werner Lemberg <wl@gnu.org>
Date: Wed, 15 Oct 2008 13:20:17 +0000
Subject: [PATCH] add comment

---
 src/sfnt/sfobjs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/sfnt/sfobjs.c b/src/sfnt/sfobjs.c
index d14d552ce..3333aa62f 100644
--- a/src/sfnt/sfobjs.c
+++ b/src/sfnt/sfobjs.c
@@ -952,7 +952,9 @@
                                      ? face->vertical.advance_Height_Max
                                      : root->height );
 
-        /* see http://www.microsoft.com/OpenType/OTSpec/post.htm */
+        /* See http://www.microsoft.com/OpenType/OTSpec/post.htm -- */
+        /* Adjust underline position from top edge to centre of     */
+        /* stroke to convert TrueType meaning to FreeType meaning.  */
         root->underline_position  = face->postscript.underlinePosition -
                                     face->postscript.underlineThickness / 2;
         root->underline_thickness = face->postscript.underlineThickness;