Added autotest for threaded text rendering.

Task-number: QTBUG-18516
Reviewed-by: TRUSTME
(cherry picked from commit 903d4dc2196df2775255c24c707bfeb571992bb7)

1 files changed, 41 insertions, 0 deletions

diff --git a/tests/auto/qpainter/tst_qpainter.cpp b/tests/auto/qpainter/tst_qpainter.cpp
index 76bc5d6370..984443490f 100644
--- a/tests/auto/qpainter/tst_qpainter.cpp
+++ b/tests/auto/qpainter/tst_qpainter.cpp
@@ -72,6 +72,7 @@
 #include <qgraphicsscene.h>
 #include <qgraphicsproxywidget.h>
 #include <qlayout.h>
+#include <qfontdatabase.h>
 
 #if defined(Q_OS_SYMBIAN)
 # define SRCDIR "."
@@ -266,6 +267,8 @@ private slots:
 
     void QTBUG17053_zeroDashPattern();
 
+    void drawTextOutsideGuiThread();
+
 private:
     void fillData();
     void setPenColor(QPainter& p);
@@ -4739,6 +4742,44 @@ void tst_QPainter::QTBUG17053_zeroDashPattern()
     QCOMPARE(image, original);
 }
 
+class TextDrawerThread : public QThread
+{
+public:
+    void run();
+    QImage rendering;
+};
+
+void TextDrawerThread::run()
+{
+    rendering = QImage(100, 100, QImage::Format_ARGB32_Premultiplied);
+    rendering.fill(0);
+    QPainter p(&rendering);
+    p.fillRect(10, 10, 100, 100, Qt::blue);
+    p.setPen(Qt::green);
+    p.drawText(20, 20, "some text");
+    p.end();
+}
+
+void tst_QPainter::drawTextOutsideGuiThread()
+{
+    if (!QFontDatabase::supportsThreadedFontRendering())
+        QSKIP("No threaded font rendering", SkipAll);
+
+    QImage referenceRendering(100, 100, QImage::Format_ARGB32_Premultiplied);
+    referenceRendering.fill(0);
+    QPainter p(&referenceRendering);
+    p.fillRect(10, 10, 100, 100, Qt::blue);
+    p.setPen(Qt::green);
+    p.drawText(20, 20, "some text");
+    p.end();
+
+    TextDrawerThread t;
+    t.start();
+    t.wait();
+
+    QCOMPARE(referenceRendering, t.rendering);
+}
+
 QTEST_MAIN(tst_QPainter)
 
 #include "tst_qpainter.moc"