From b1e082ec9f4ec0a603f69e280fe2c5438c67a09e Mon Sep 17 00:00:00 2001
From: Olivier Goffart <ogoffart@woboq.com>
Date: Thu, 16 Aug 2012 09:53:44 +0200
Subject: Fix performence problem while shaping a lines with many scripts

Fix quadradic behaviour regression introduced in commit
2e6b8b4734710377e25c199e3ff7865628e7d723

Task-number: QTBUG-22275
Change-Id: I343452c6b1cd0e571770e5dadd3cd6fd3167c96d
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
---
 src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/3rdparty/harfbuzz')

diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp b/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
index 6f663d5f9b..1024c8162f 100644
--- a/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
@@ -884,7 +884,7 @@ HB_Bool HB_SelectScript(HB_ShaperItem *shaper_item, const HB_OpenTypeFeature *fe
 
 static HB_Bool containsSurrogates(HB_ShaperItem *item)
 {
-    for (hb_uint32 i=0; i<item->stringLength; ++i) {
+    for (hb_uint32 i=item->item.pos; i<item->item.pos+item->item.length; ++i) {
         HB_UChar16 ucs = item->string[i];
         if ( HB_IsHighSurrogate(ucs) || HB_IsLowSurrogate(ucs) )
             return true;
-- 
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