[PATCH] terminal: Don't try to render RLE used as a placeholder

[Daiki Ueno]

weston-terminal uses RLE (U+202B) as a placeholder of the right half
of a double width character.  However, not all fonts include this
glyph and cairo renders it as .notdef (glyph index 0) in that case.
---
A screenshot showing the problem:
http://du-a.org/~ueno/junk/terminal-rle.png
where a small rectangle is accompanied by every Japanese character.

I increased the font size for visibility, but it can also happen with
the default font on Fedora 20.

 clients/terminal.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/clients/terminal.c b/clients/terminal.c
index beec877..5931ce2 100644
--- a/clients/terminal.c
+++ b/clients/terminal.c
@@ -1094,6 +1094,12 @@ redraw_handler(struct widget *widget, void *data)
 				cairo_stroke(cr);
 			}
 
+                        /* skip space glyph (RLE) we use as a placeholder of
+                           the right half of a double-width character,
+                           because RLE is not available in every font. */
+			if (p_row[col].ch == 0x200B)
+				continue;
+
 			glyph_run_add(&run, text_x, text_y, &p_row[col]);
 		}
 	}
-- 
1.9.0