From 8c984c2440d7b085fbe6302fb60f472b1f3c79a2 Mon Sep 17 00:00:00 2001
From: "Unknown W. Brackets" <checkins@unknownbrackets.org>
Date: Mon, 27 May 2013 19:26:37 -0700
Subject: [PATCH] Use better replacements for missing space chars.

---
 Core/Util/PPGeDraw.cpp | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/Core/Util/PPGeDraw.cpp b/Core/Util/PPGeDraw.cpp
index 6e64c427d7..33fd9283c6 100644
--- a/Core/Util/PPGeDraw.cpp
+++ b/Core/Util/PPGeDraw.cpp
@@ -266,10 +266,35 @@ void PPGeEnd()
 static const AtlasChar *PPGeGetChar(const AtlasFont &atlasfont, unsigned int cval)
 {
 	const AtlasChar *c = atlasfont.getChar(cval);
-	if (c == NULL)
-		c = atlasfont.getChar(0xFFFD);
-	if (c == NULL)
-		c = atlasfont.getChar('?');
+	if (c == NULL) {
+		// Try to use a replacement character, these come from the below table.
+		// http://unicode.org/cldr/charts/supplemental/character_fallback_substitutions.html
+		switch (cval) {
+		case 0x00A0: // NO-BREAK SPACE
+		case 0x2000: // EN QUAD
+		case 0x2001: // EM QUAD
+		case 0x2002: // EN SPACE
+		case 0x2003: // EM SPACE
+		case 0x2004: // THREE-PER-EM SPACE
+		case 0x2005: // FOUR-PER-EM SPACE
+		case 0x2006: // SIX-PER-EM SPACE
+		case 0x2007: // FIGURE SPACE
+		case 0x2008: // PUNCTUATION SPACE
+		case 0x2009: // THIN SPACE
+		case 0x200A: // HAIR SPACE
+		case 0x202F: // NARROW NO-BREAK SPACE
+		case 0x205F: // MEDIUM MATHEMATICAL
+		case 0x3000: // IDEOGRAPHIC SPACE
+			c = atlasfont.getChar(0x0020);
+			break;
+
+		default:
+			c = atlasfont.getChar(0xFFFD);
+			break;
+		}
+		if (c == NULL)
+			c = atlasfont.getChar('?');
+	}
 	return c;
 }