diff options
Diffstat (limited to 'tests/auto/gui/image/qimage/tst_qimage.cpp')
| -rw-r--r-- | tests/auto/gui/image/qimage/tst_qimage.cpp | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tests/auto/gui/image/qimage/tst_qimage.cpp b/tests/auto/gui/image/qimage/tst_qimage.cpp index decd4ef931..0f9bdc7a1a 100644 --- a/tests/auto/gui/image/qimage/tst_qimage.cpp +++ b/tests/auto/gui/image/qimage/tst_qimage.cpp @@ -178,6 +178,8 @@ private slots: void cleanupFunctions(); + void devicePixelRatio(); + private: const QString m_prefix; }; @@ -2730,5 +2732,32 @@ void tst_QImage::cleanupFunctions() } +// test image devicePixelRatio setting and detaching +void tst_QImage::devicePixelRatio() +{ + // create image + QImage a(64, 64, QImage::Format_ARGB32); + a.fill(Qt::white); + QCOMPARE(a.devicePixelRatio(), qreal(1.0)); + QCOMPARE(a.isDetached(), true); + + // copy image + QImage b = a; + QCOMPARE(b.devicePixelRatio(), qreal(1.0)); + QCOMPARE(a.isDetached(), false); + QCOMPARE(b.isDetached(), false); + + // set devicePixelRatio to the current value: does not detach + a.setDevicePixelRatio(qreal(1.0)); + QCOMPARE(a.isDetached(), false); + QCOMPARE(b.isDetached(), false); + + // set devicePixelRatio to a new value: may detach (currently + // does, but we may want to avoid the data copy the future) + a.setDevicePixelRatio(qreal(2.0)); + QCOMPARE(a.devicePixelRatio(), qreal(2.0)); + QCOMPARE(b.devicePixelRatio(), qreal(1.0)); +} + QTEST_GUILESS_MAIN(tst_QImage) #include "tst_qimage.moc" |