From 4db8132fe1d760bbd0356ddad0ecd8496b893933 Mon Sep 17 00:00:00 2001
From: Jonathan Kew <jkew@mozilla.com>
Date: Tue, 3 Apr 2012 12:22:18 +0100
Subject: [PATCH] bug 717175 - flush shaped-word caches if they grow
 excessively large. r=roc

---
 gfx/thebes/gfxFont.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gfx/thebes/gfxFont.cpp b/gfx/thebes/gfxFont.cpp
index 5c6ef0eb4dff..be9dfeab53c1 100644
--- a/gfx/thebes/gfxFont.cpp
+++ b/gfx/thebes/gfxFont.cpp
@@ -2129,6 +2129,12 @@ gfxFont::GetShapedWord(gfxContext *aContext,
                        PRInt32 aAppUnitsPerDevUnit,
                        PRUint32 aFlags)
 {
+    // if the cache is getting too big, flush it and start over
+    if (mWordCache.Count() > 10000) {
+        NS_WARNING("flushing shaped-word cache");
+        ClearCachedWords();
+    }
+
     // if there's a cached entry for this word, just return it
     CacheHashKey key(aText, aLength, aHash,
                      aRunScript,