Fix QTransform::map(const QPainterPath &) not working with paths that

have only one element

Replaced the isEmpty() check for the shortcut in map() with elementCount() == 0

Task-number: QTBUG-11264
Reviewed-by: Samuel

2 files changed, 9 insertions, 1 deletions

diff --git a/src/gui/painting/qtransform.cpp b/src/gui/painting/qtransform.cpp
index 423cce9..47b7758 100644
--- a/src/gui/painting/qtransform.cpp
+++ b/src/gui/painting/qtransform.cpp
@@ -1626,7 +1626,7 @@ static QPainterPath mapProjective(const QTransform &transform, const QPainterPat
 QPainterPath QTransform::map(const QPainterPath &path) const
 {
     TransformationType t = inline_type();
-    if (t == TxNone || path.isEmpty())
+    if (t == TxNone || path.elementCount() == 0)
         return path;
 
     if (t >= TxProject)
diff --git a/tests/auto/qtransform/tst_qtransform.cpp b/tests/auto/qtransform/tst_qtransform.cpp
index a3ded8e..c784b3a 100644
--- a/tests/auto/qtransform/tst_qtransform.cpp
+++ b/tests/auto/qtransform/tst_qtransform.cpp
@@ -85,6 +85,7 @@ private slots:
     void inverted();
     void projectivePathMapping();
     void mapInt();
+    void mapPathWithPoint();
 
 private:
     void mapping_data();
@@ -793,6 +794,13 @@ void tst_QTransform::mapInt()
     QCOMPARE(y, 10);
 }
 
+void tst_QTransform::mapPathWithPoint()
+{
+    QPainterPath p(QPointF(10, 10));
+    p = QTransform::fromTranslate(10, 10).map(p);
+    QCOMPARE(p.currentPosition(), QPointF(20, 20));
+}
+
 QTEST_APPLESS_MAIN(tst_QTransform)