Merge branch '4.5' of git@scm.dev.nokia.troll.no:qt/qt

1 files changed, 18 insertions, 0 deletions

diff --git a/tests/auto/qpainter/tst_qpainter.cpp b/tests/auto/qpainter/tst_qpainter.cpp
index 0cb8346f08..b813d1d801 100644
--- a/tests/auto/qpainter/tst_qpainter.cpp
+++ b/tests/auto/qpainter/tst_qpainter.cpp
@@ -229,6 +229,8 @@ private slots:
 
     void extendedBlendModes();
 
+    void zeroOpacity();
+
 private:
     void fillData();
     QColor baseColor( int k, int intensity=255 );
@@ -4153,5 +4155,21 @@ void tst_QPainter::extendedBlendModes()
     QVERIFY(testCompositionMode(191, 191,  96, QPainter::CompositionMode_Exclusion));
 }
 
+void tst_QPainter::zeroOpacity()
+{
+    QImage source(1, 1, QImage::Format_ARGB32_Premultiplied);
+    source.fill(0xffffffff);
+
+    QImage target(1, 1, QImage::Format_RGB32);
+    target.fill(0xff000000);
+
+    QPainter p(&target);
+    p.setOpacity(0.0);
+    p.drawImage(0, 0, source);
+    p.end();
+
+    QCOMPARE(target.pixel(0, 0), 0xff000000);
+}
+
 QTEST_MAIN(tst_QPainter)
 #include "tst_qpainter.moc"