Fix rendering of CurvePolygons without curved segments (fix #14028)

python/core/geometry/qgswkbtypes.sip

@@ -113,6 +113,11 @@ class QgsWKBTypes
      */
     static bool isMultiType( Type type );
 
+    /** Returns true if the WKB type is a curved type or can contain curved geometries.
+     * @note added in QGIS 2.14
+     */
+    static bool isCurvedType( Type type );
+
     /** Returns the inherent dimension of the geometry type as an integer. Returned value will
      * always be less than or equal to the coordinate dimension.
      * @returns 0 for point geometries, 1 for line geometries, 2 for polygon geometries

src/core/geometry/qgswkbtypes.cpp

@@ -94,6 +94,24 @@ bool QgsWKBTypes::isMultiType( Type type )
   return it->mIsMultiType;
 }
 
+bool QgsWKBTypes::isCurvedType( QgsWKBTypes::Type type )
+{
+  switch ( flatType( type ) )
+  {
+    case CircularString:
+    case CompoundCurve:
+    case CurvePolygon:
+    case MultiCurve:
+    case MultiSurface:
+      return true;
+
+    default:
+      return false;
+  }
+
+  return false;
+}
+
 /***************************************************************************
  * This class is considered CRITICAL and any change MUST be accompanied with
  * full unit tests.

src/core/geometry/qgswkbtypes.h

@@ -144,6 +144,11 @@ class CORE_EXPORT QgsWKBTypes
      */
     static bool isMultiType( Type type );
 
+    /** Returns true if the WKB type is a curved type or can contain curved geometries.
+     * @note added in QGIS 2.14
+     */
+    static bool isCurvedType( Type type );
+
     /** Returns the inherent dimension of the geometry type as an integer. Returned value will
      * always be less than or equal to the coordinate dimension.
      * @returns 0 for point geometries, 1 for line geometries, 2 for polygon geometries

src/core/symbology-ng/qgssymbolv2.cpp

@@ -702,7 +702,7 @@ void QgsSymbolV2::renderFeature( const QgsFeature& feature, QgsRenderContext& co
   bool tileMapRendering = context.testFlag( QgsRenderContext::RenderMapTile );
 
   //convert curve types to normal point/line/polygon ones
-  if ( geom->geometry()->hasCurvedSegments() )
+  if ( QgsWKBTypes::isCurvedType( geom->geometry()->wkbType() ) )
   {
     QgsAbstractGeometryV2* g = geom->geometry()->segmentize();
     if ( !g )

tests/src/python/test_qgsgeometry.py

@@ -2324,6 +2324,64 @@ class TestQgsGeometry(TestCase):
         assert QgsWKBTypes.isMultiType(QgsWKBTypes.MultiLineString25D)
         assert QgsWKBTypes.isMultiType(QgsWKBTypes.MultiPolygon25D)
 
+        # test isCurvedType methods
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.Unknown)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.Point)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.LineString)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.Polygon)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPoint)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiLineString)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPolygon)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.GeometryCollection)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CircularString)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CompoundCurve)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CurvePolygon)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiCurve)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiSurface)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.NoGeometry)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.PointZ)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.LineStringZ)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.PolygonZ)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPointZ)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiLineStringZ)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPolygonZ)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.GeometryCollectionZ)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CircularStringZ)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CompoundCurveZ)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CurvePolygonZ)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiCurveZ)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiSurfaceZ)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.PointM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.LineStringM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.PolygonM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPointM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiLineStringM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPolygonM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.GeometryCollectionM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CircularStringM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CompoundCurveM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CurvePolygonM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiCurveM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiSurfaceM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.PointZM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.LineStringZM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.PolygonZM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPointZM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiLineStringZM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPolygonZM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.GeometryCollectionZM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CircularStringZM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CompoundCurveZM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.CurvePolygonZM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiCurveZM)
+        assert QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiSurfaceZM)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.Point25D)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.LineString25D)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.Polygon25D)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPoint25D)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiLineString25D)
+        assert not QgsWKBTypes.isCurvedType(QgsWKBTypes.MultiPolygon25D)
+
         # test hasZ methods
         assert not QgsWKBTypes.hasZ(QgsWKBTypes.Unknown)
         assert not QgsWKBTypes.hasZ(QgsWKBTypes.Point)

tests/src/python/test_qgssymbolv2.py

@@ -95,7 +95,13 @@ class TestQgsSymbolV2(TestCase):
                   'reference_image': 'compound_curve'},
                  {'name': 'CurvePolygon',
                   'wkt': 'CURVEPOLYGON(CIRCULARSTRING(1 3, 3 5, 4 7, 7 3, 1 3))',
-                  'reference_image': 'curve_polygon'}]
+                  'reference_image': 'curve_polygon'},
+                 {'name': 'MultiCurve',
+                  'wkt': 'MultiCurve((5 5,3 5,3 3,0 3),CIRCULARSTRING(0 0, 2 1,2 2))',
+                  'reference_image': 'multicurve'},
+                 {'name': 'CurvePolygon_no_arc',  # refs #14028
+                  'wkt': 'CURVEPOLYGON(LINESTRING(1 3, 3 5, 4 7, 7 3, 1 3))',
+                  'reference_image': 'curve_polygon_no_arc'}]
 
         for test in tests:
             geom = QgsGeometry.fromWkt(test['wkt'])
@@ -110,18 +116,18 @@ class TestQgsSymbolV2(TestCase):
             geom_z = QgsGeometry.fromWkt(test['wkt'])
             geom_z.geometry().addZValue(5)
             rendered_image = self.renderGeometry(geom_z)
-            assert self.imageCheck(test['name'] + ' z', test['reference_image'], rendered_image)
+            assert self.imageCheck(test['name'] + 'Z', test['reference_image'], rendered_image)
 
             #test with ZM
             geom_z.geometry().addMValue(15)
             rendered_image = self.renderGeometry(geom_z)
-            assert self.imageCheck(test['name'] + ' zm', test['reference_image'], rendered_image)
+            assert self.imageCheck(test['name'] + 'ZM', test['reference_image'], rendered_image)
 
             #test with ZM
             geom_m = QgsGeometry.fromWkt(test['wkt'])
             geom_m.geometry().addMValue(15)
             rendered_image = self.renderGeometry(geom_m)
-            assert self.imageCheck(test['name'] + ' m', test['reference_image'], rendered_image)
+            assert self.imageCheck(test['name'] + 'M', test['reference_image'], rendered_image)
 
     def renderGeometry(self, geom):
         f = QgsFeature()