Fixed bugs in QPainterPath::united().

Change from a relative to an absolute fuzzy compare as was the case
pre-4.4. With a relative fuzzy compare points that have an x or y
coordinate of 0 will never be merged with points that are very close to
0, for example (1e-15, 0).

Task-number: 251909
Reviewed-by: Trond

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/auto/qpathclipper/tst_qpathclipper.cpp b/tests/auto/qpathclipper/tst_qpathclipper.cpp
index f3077ee391..6e6b632b1e 100644
--- a/tests/auto/qpathclipper/tst_qpathclipper.cpp
+++ b/tests/auto/qpathclipper/tst_qpathclipper.cpp
@@ -93,6 +93,7 @@ private slots:
     void task204301();
 
     void task209056();
+    void task251909();
 };
 
 Q_DECLARE_METATYPE(QPainterPath)
@@ -1397,6 +1398,25 @@ void tst_QPathClipper::task209056()
     QVERIFY(p3 != QPainterPath());
 }
 
+void tst_QPathClipper::task251909()
+{
+    QPainterPath p1;
+    p1.moveTo(0, -10);
+    p1.lineTo(10, -10);
+    p1.lineTo(10, 0);
+    p1.lineTo(0, 0);
+
+    QPainterPath p2;
+    p2.moveTo(0, 8e-14);
+    p2.lineTo(10, -8e-14);
+    p2.lineTo(10, 10);
+    p2.lineTo(0, 10);
+
+    QPainterPath result = p1.united(p2);
+
+    QVERIFY(result.elementCount() <= 5);
+}
+
 QTEST_APPLESS_MAIN(tst_QPathClipper)