From 1acc9bcf4c43851af2096539eda88da9ef58bce3 Mon Sep 17 00:00:00 2001
From: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>
Date: Tue, 30 Mar 2010 10:05:10 +0200
Subject: Avoid taking sqrt of negative number in FT font engine

When using a reflecting matrix, the determinant will be -1, thus the
call to sqrt() will return NaN. Same fix as in 0fa878c4d2.

Task-number: QTBUG-9442
Reviewed-by: Trond
---
 src/gui/text/qfontengine_ft.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gui/text/qfontengine_ft.cpp b/src/gui/text/qfontengine_ft.cpp
index a9def8e..449dffd 100644
--- a/src/gui/text/qfontengine_ft.cpp
+++ b/src/gui/text/qfontengine_ft.cpp
@@ -1368,7 +1368,7 @@ QFontEngineFT::QGlyphSet *QFontEngineFT::loadTransformedGlyphSet(const QTransfor
 
     if (!gs) {
         // don't try to load huge fonts
-        bool draw_as_outline = fontDef.pixelSize * qSqrt(matrix.det()) >= 64;
+        bool draw_as_outline = fontDef.pixelSize * qSqrt(qAbs(matrix.det())) >= 64;
         if (draw_as_outline)
             return 0;
 
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