Merge branch 4.7 into qt-master-from-4.7

1 files changed, 33 insertions, 0 deletions

diff --git a/tests/auto/qpainter/tst_qpainter.cpp b/tests/auto/qpainter/tst_qpainter.cpp
index f7db6b3..42303d2 100644
--- a/tests/auto/qpainter/tst_qpainter.cpp
+++ b/tests/auto/qpainter/tst_qpainter.cpp
@@ -49,6 +49,7 @@
 #include <qfontmetrics.h>
 #include <qbitmap.h>
 #include <qimage.h>
+#include <qthread.h>
 #include <limits.h>
 #if !defined(Q_OS_WINCE) && !defined(Q_OS_SYMBIAN)
 #include <qprinter.h>
@@ -258,6 +259,8 @@ private slots:
 
     void drawPointScaled();
 
+    void QTBUG14614_gradientCacheRaceCondition();
+
 private:
     void fillData();
     void setPenColor(QPainter& p);
@@ -4652,6 +4655,36 @@ void tst_QPainter::drawPointScaled()
     QCOMPARE(image.pixel(16, 16), 0xffff0000);
 }
 
+class GradientProducer : public QThread
+{
+protected:
+    void run();
+};
+
+void GradientProducer::run()
+{
+    QImage image(1, 1, QImage::Format_RGB32);
+    QPainter p(&image);
+
+    for (int i = 0; i < 1000; ++i) {
+        QLinearGradient g;
+        g.setColorAt(0, QColor(i % 256, 0, 0));
+        g.setColorAt(1, Qt::white);
+
+        p.fillRect(image.rect(), g);
+    }
+}
+
+void tst_QPainter::QTBUG14614_gradientCacheRaceCondition()
+{
+    const int threadCount = 16;
+    GradientProducer producers[threadCount];
+    for (int i = 0; i < threadCount; ++i)
+        producers[i].start();
+    for (int i = 0; i < threadCount; ++i)
+        producers[i].wait();
+}
+
 QTEST_MAIN(tst_QPainter)
 
 #include "tst_qpainter.moc"