Fixed DeviceCoordinateCache items when using QGraphicsScene::render().

Since viewRect is null, we shouldn't try to use the partialCacheExposure
path which intersects the viewRect with the device rect of the item.

Task-number: QTBUG-15977
Reviewed-by: Bjørn Erik Nilsen

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
index 6a2f849..588c476 100644
--- a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
+++ b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
@@ -288,6 +288,7 @@ private slots:
     void taskQT657_paintIntoCacheWithTransparentParts();
     void taskQTBUG_7863_paintIntoCacheWithTransparentParts();
     void taskQT_3674_doNotCrash();
+    void taskQTBUG_15977_renderWithDeviceCoordinateCache();
 };
 
 void tst_QGraphicsScene::initTestCase()
@@ -4629,5 +4630,27 @@ void tst_QGraphicsScene::zeroScale()
     QTRY_COMPARE(cl.changes.count(), 2);
 }
 
+void tst_QGraphicsScene::taskQTBUG_15977_renderWithDeviceCoordinateCache()
+{
+    QGraphicsScene scene;
+    scene.setSceneRect(0, 0, 100, 100);
+    QGraphicsRectItem *rect = scene.addRect(0, 0, 100, 100);
+    rect->setPen(Qt::NoPen);
+    rect->setBrush(Qt::red);
+    rect->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
+
+    QImage image(100, 100, QImage::Format_RGB32);
+    QPainter p(&image);
+    scene.render(&p);
+    p.end();
+
+    QImage expected(100, 100, QImage::Format_RGB32);
+    p.begin(&expected);
+    p.fillRect(expected.rect(), Qt::red);
+    p.end();
+
+    QCOMPARE(image, expected);
+}
+
 QTEST_MAIN(tst_QGraphicsScene)
 #include "tst_qgraphicsscene.moc"