diff options
| -rw-r--r-- | src/gui/graphicsview/qgraphicsscene.cpp | 4 | ||||
| -rw-r--r-- | tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp | 23 |
2 files changed, 25 insertions, 2 deletions
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp index a0015dc..726e6d7 100644 --- a/src/gui/graphicsview/qgraphicsscene.cpp +++ b/src/gui/graphicsview/qgraphicsscene.cpp @@ -4583,13 +4583,13 @@ void QGraphicsScenePrivate::drawItemHelper(QGraphicsItem *item, QPainter *painte itemCache->exposed.clear(); deviceData->cacheIndent = QPoint(); pix = QPixmap(); - } else { + } else if (!viewRect.isNull()) { allowPartialCacheExposure = deviceData->cacheIndent != QPoint(); } // Allow partial cache exposure if the device rect isn't fully contained and // deviceRect is 20% taller or wider than the viewRect. - if (!allowPartialCacheExposure && !viewRect.contains(deviceRect)) { + if (!allowPartialCacheExposure && !viewRect.isNull() && !viewRect.contains(deviceRect)) { allowPartialCacheExposure = (viewRect.width() * 1.2 < deviceRect.width()) || (viewRect.height() * 1.2 < deviceRect.height()); } 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" |