From: Kenichi Handa <handa@m17n.org>
Date: Fri, 23 May 2008 06:11:53 +0000 (+0000)
Subject: (x_draw_glyph_string): Be sure to draw underline within the current
X-Git-Tag: emacs-pretest-23.0.90~5338
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=efdf1b43d7bb507aca5536ee1171bd1bf6cc32d5;p=emacs.git

(x_draw_glyph_string): Be sure to draw underline within the current
line area.
---

diff --git a/src/w32term.c b/src/w32term.c
index eb45d30b54b..5f5a3f954a9 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -2909,6 +2909,12 @@ x_draw_glyph_string (s)
                   position = (s->font->descent + 1) / 2;
                 }
             }
+	  /* Check the sanity of thickness and position.  We should
+	     avoid drawing underline out of the current line area.  */
+	  if (s->y + s->height <= s->ybase + position)
+	    position = s->y + s->height - 1;
+	  if (s->y + s->height < s->ybase + position + thickness)
+	    thickness = (s->y + s->height) - (s->ybase + position);
 	  s->underline_thickness = thickness;
 	  s->underline_position =position;
           y = s->ybase + position;