From 99cab8389af03d5ca447d79b3a01885b1c22744a Mon Sep 17 00:00:00 2001
From: Michael Drake <tlsa@netsurf-browser.org>
Date: Mon, 11 Feb 2013 17:05:42 +0000
Subject: Early detection of regions outside the visible.

---
 desktop/textarea.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'desktop')

diff --git a/desktop/textarea.c b/desktop/textarea.c
index eedc09115..61d21ccea 100644
--- a/desktop/textarea.c
+++ b/desktop/textarea.c
@@ -1600,6 +1600,15 @@ void textarea_redraw(struct textarea *ta, int x, int y, colour bg, float scale,
 
 			/* set clip rectangle for line part */
 			s = r;
+
+			if (s.x1 < left || s.x0 > right) {
+				/* Skip this span, it's outside the visible */
+				c_pos += c_len_part;
+				c_len -= c_len_part;
+				continue;
+			}
+
+			/* Adjust clip rectangle to span limits */
 			if (s.x0 < left)
 				s.x0 = left;
 			if (s.x1 > right)
-- 
cgit v1.2.3