commit b67d537070e88feb708d13b46cd1468e2c0dc0e8
Author: Gunnar Sletta <gunnar.sletta@nokia.com>
Date:   Thu Feb 10 16:10:57 2011 +1000

    Allow using QPixmap outside GUI thread when using raster

diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index f896572..b276180 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -98,12 +98,21 @@ static bool qt_pixmap_thread_test()
         qFatal("QPixmap: Must construct a QApplication before a QPaintDevice");
         return false;
     }
-#ifndef Q_WS_WIN
-    if (!QApplication::testAttribute(Qt::AA_X11InitThreads) && qApp->thread() != QThread::currentThread()) {
-        qWarning("QPixmap: It is not safe to use pixmaps outside the GUI thread");
-        return false;
-    }
+
+    if (qApp->thread() != QThread::currentThread()) {
+        bool fail = false;
+#if defined (Q_WS_X11)
+        if (!QApplication::testAttribute(Qt::AA_X11InitThreads))
+            fail = true;
+#else
+        if (QApplicationPrivate::graphics_system_name != QLatin1String("raster"))
+            fail = true;
 #endif
+        if (fail) {
+            qWarning("QPixmap: It is not safe to use pixmaps outside the GUI thread");
+            return false;
+        }
+    }
     return true;
 }