From: Gerd Moellmann <gerd@gnu.org>
Date: Wed, 5 Jul 2000 11:39:35 +0000 (+0000)
Subject: (clear_glyph_row): Add debug code in #if 0.
X-Git-Tag: emacs-pretest-21.0.90~2983
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=45560b1ad437589024957bcb16211d4c1030907b;p=emacs.git

(clear_glyph_row): Add debug code in #if 0.
---

diff --git a/src/dispnew.c b/src/dispnew.c
index c0176a59abc..233507fd2cb 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -990,6 +990,16 @@ clear_glyph_row (row)
   row->glyphs[TEXT_AREA] = p[TEXT_AREA];
   row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA];
   row->glyphs[LAST_AREA] = p[LAST_AREA];
+
+#if 0 /* At some point, some bit-fields of struct glyph were not set,
+	 which made glyphs unequal when compared with GLYPH_EQUAL_P.
+	 Redisplay outputs such glyphs, and flickering effects were
+	 the result.  This also depended on the contents of memory
+	 returned by xmalloc.  If flickering happens again, activate
+	 the code below If the flickering is gone with that, chances
+	 are that the flickering has the same reason as here.  */
+  bzero (p[0], (char *) p[LAST_AREA] - (char *) p[0]);
+#endif
 }