Remove ugly line at the bottom of the map

Mapitems that extend below 85 deg South show a black line at the bottom of
the map. The cause for this line is too narrow clipping and point insertion
which is removed with this change.

Change-Id: I6707aede97082f7b1764cd7dd6bbe351baaad3da
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 688fd0edd9d6149e3e02f2186e7590ca13c087d5)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

2 files changed, 5 insertions, 13 deletions

diff --git a/src/location/maps/qgeoprojection.cpp b/src/location/maps/qgeoprojection.cpp
index 3e5ea2ef..8f1e7d82 100644
--- a/src/location/maps/qgeoprojection.cpp
+++ b/src/location/maps/qgeoprojection.cpp
@@ -808,15 +808,6 @@ void QGeoProjectionWebMercator::updateVisibleRegion()
         m_visibleRegionExpanded.push_back(centroid + vc * 1.2); // fixing expansion factor to 1.2
     }
 
-    QClipperUtils clipperExpanded;
-    clipperExpanded.clearClipper();
-    clipperExpanded.addSubjectPath(m_visibleRegionExpanded, true);
-    clipperExpanded.addClipPolygon(m_projectableRegion);
-    const auto resVisibleExpanded = clipperExpanded.execute(QClipperUtils::Intersection);
-    if (resVisibleExpanded.size())
-        m_visibleRegionExpanded = resVisibleExpanded[0]; // Intersection between two convex quadrilaterals should always be a single polygon
-    else
-        m_visibleRegionExpanded = m_visibleRegion;
 }
 
 QGeoCameraData QGeoProjectionWebMercator::cameraData() const
diff --git a/src/location/quickmapitems/qdeclarativecirclemapitem.cpp b/src/location/quickmapitems/qdeclarativecirclemapitem.cpp
index e01b724e..7cf69e59 100644
--- a/src/location/quickmapitems/qdeclarativecirclemapitem.cpp
+++ b/src/location/quickmapitems/qdeclarativecirclemapitem.cpp
@@ -371,7 +371,7 @@ void QDeclarativeCircleMapItemPrivate::includeOnePoleInPath(QList<QDoubleVector2
               [](const QDoubleVector2D &a, const QDoubleVector2D &b) -> bool
                 {return a.x() < b.x();});
 
-    const qreal newPoleLat = crossNorthPole ? 0.0 : 1.0;
+    const qreal newPoleLat = crossNorthPole ? -0.1 : 1.1;
     const QDoubleVector2D P1 = path.first() + QDoubleVector2D(1.0, 0.0);
     const QDoubleVector2D P2 = path.last() - QDoubleVector2D(1.0, 0.0);
     path.push_front(P2);
@@ -478,13 +478,14 @@ void QDeclarativeCircleMapItemPrivateCPU::updatePolish()
         QGeoMapPolygonGeometry::MapBorderBehaviour wrappingMode = QGeoMapPolygonGeometry::DrawOnce;
         QList<QDoubleVector2D> surroundingRect;
         if (cameraRect.contains(circleRect)){
-            cameraRect = cameraRect.adjusted(-0.1, 0.0, 0.2, 0.0);
+            cameraRect = cameraRect.adjusted(-0.1, -0.1, 0.2, 0.2);
             surroundingRect = {{cameraRect.left(), cameraRect.top()}, {cameraRect.right(), cameraRect.top()},
                                {cameraRect.right(), cameraRect.bottom()}, {cameraRect.left() , cameraRect.bottom()}};
         } else {
             const qreal anchorRect = centerX;
-            surroundingRect = {{anchorRect, 0.0}, {anchorRect + 1.0, 0.0},
-                               {anchorRect + 1.0, 1.0}, {anchorRect, 1.0}};
+
+            surroundingRect = {{anchorRect, -0.1}, {anchorRect + 1.0, -0.1},
+                               {anchorRect + 1.0, 1.1}, {anchorRect, 1.1}};
             wrappingMode = QGeoMapPolygonGeometry::WrapAround;
         }
         m_geometry.updateSourcePoints(*m_circle.map(), {surroundingRect, circlePath}, wrappingMode);