Prevent crash in OpenGL engine when scaling images / pixmaps.

Make sure the resulting image / pixmap is valid if the source was valid.

Task-number: QTBUG-19157
Reviewed-by: Kim
Reviewed-by: Benjamin Poulain

2 files changed, 16 insertions, 0 deletions

diff --git a/tests/auto/qimage/tst_qimage.cpp b/tests/auto/qimage/tst_qimage.cpp
index 558dfaa..6bb08b0 100644
--- a/tests/auto/qimage/tst_qimage.cpp
+++ b/tests/auto/qimage/tst_qimage.cpp
@@ -144,6 +144,7 @@ private slots:
     void rgbSwapped();
 
     void deepCopyWhenPaintingActive();
+    void scaled_QTBUG19157();
 };
 
 tst_QImage::tst_QImage()
@@ -1902,5 +1903,12 @@ void tst_QImage::deepCopyWhenPaintingActive()
     QVERIFY(copy != image);
 }
 
+void tst_QImage::scaled_QTBUG19157()
+{
+    QImage foo(5000, 1, QImage::Format_RGB32);
+    foo = foo.scaled(1024, 1024, Qt::KeepAspectRatio);
+    QVERIFY(!foo.isNull());
+}
+
 QTEST_MAIN(tst_QImage)
 #include "tst_qimage.moc"
diff --git a/tests/auto/qpixmap/tst_qpixmap.cpp b/tests/auto/qpixmap/tst_qpixmap.cpp
index 0b2f527..12d31e3 100644
--- a/tests/auto/qpixmap/tst_qpixmap.cpp
+++ b/tests/auto/qpixmap/tst_qpixmap.cpp
@@ -196,6 +196,7 @@ private slots:
 #endif
 
     void drawPixmapWhilePainterOpen();
+    void scaled_QTBUG19157();
 };
 
 static bool lenientCompare(const QPixmap &actual, const QPixmap &expected)
@@ -1942,5 +1943,12 @@ void tst_QPixmap::drawPixmapWhilePainterOpen()
     }
 }
 
+void tst_QPixmap::scaled_QTBUG19157()
+{
+    QPixmap foo(5000, 1);
+    foo = foo.scaled(1024, 1024, Qt::KeepAspectRatio);
+    QVERIFY(!foo.isNull());
+}
+
 QTEST_MAIN(tst_QPixmap)
 #include "tst_qpixmap.moc"