Implement stubbed QgsGeometry methods

python/core/geometry/qgsgeometryengine.sip

@@ -17,6 +17,7 @@ class QgsGeometryEngine
     virtual QgsAbstractGeometryV2* combine( const QList< const QgsAbstractGeometryV2* > ) const = 0;
     virtual QgsAbstractGeometryV2* symDifference( const QgsAbstractGeometryV2& geom ) const = 0;
     virtual QgsAbstractGeometryV2* buffer( double distance, int segments ) const = 0;
+    virtual QgsAbstractGeometryV2* buffer( double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit ) const = 0;
     virtual QgsAbstractGeometryV2* simplify( double tolerance ) const = 0;
     virtual QgsAbstractGeometryV2* interpolate( double distance ) const = 0;
     virtual bool centroid( QgsPointV2& pt ) const = 0;

python/core/geometry/qgsgeos.sip

@@ -18,6 +18,7 @@ class QgsGeos: public QgsGeometryEngine
     QgsAbstractGeometryV2* combine( const QList< const QgsAbstractGeometryV2* > ) const;
     QgsAbstractGeometryV2* symDifference( const QgsAbstractGeometryV2& geom ) const;
     QgsAbstractGeometryV2* buffer( double distance, int segments ) const;
+    QgsAbstractGeometryV2* buffer( double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit ) const;
     QgsAbstractGeometryV2* simplify( double tolerance ) const;
     QgsAbstractGeometryV2* interpolate( double distance ) const;
     bool centroid( QgsPointV2& pt ) const;

src/core/geometry/qgsgeometry.cpp

@@ -1192,26 +1192,18 @@ QgsGeometry* QgsGeometry::buffer( double distance, int segments ) const
 
 QgsGeometry* QgsGeometry::buffer( double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit ) const
 {
-  return 0; //todo...
+  if ( !d || !d->geometry )
-
-#if 0
-#if defined(GEOS_VERSION_MAJOR) && defined(GEOS_VERSION_MINOR) && \
- ((GEOS_VERSION_MAJOR>3) || ((GEOS_VERSION_MAJOR==3) && (GEOS_VERSION_MINOR>=3)))
-  if ( mDirtyGeos )
-    exportWkbToGeos();
-
-  if ( !mGeos )
-    return 0;
-
-  try
   {
-    return fromGeosGeom( GEOSBufferWithStyle( mGeos, distance, segments, endCapStyle, joinStyle, mitreLimit ) );
+    return 0;
   }
-  CATCH_GEOS( 0 )
+
-#else
+  QgsGeos g( d->geometry );
-  return 0;
+  QgsAbstractGeometryV2* geom = g.buffer( distance, segments, endCapStyle, joinStyle, mitreLimit );
-#endif
+  if ( !geom )
-#endif //0
+  {
+    return 0;
+  }
+  return new QgsGeometry( geom );
 }
 
 QgsGeometry* QgsGeometry::offsetCurve( double distance, int segments, int joinStyle, double mitreLimit ) const
@@ -1484,7 +1476,7 @@ int QgsGeometry::avoidIntersections( QMap<QgsVectorLayer*, QSet< QgsFeatureId >
 
 void QgsGeometry::validateGeometry( QList<Error> &errors )
 {
-//todo // QgsGeometryValidator::validateGeometry( this, errors );
+  QgsGeometryValidator::validateGeometry( this, errors );
 }
 
 bool QgsGeometry::isGeosValid() const

src/core/geometry/qgsgeometryengine.h

@@ -38,6 +38,7 @@ class CORE_EXPORT QgsGeometryEngine
     virtual QgsAbstractGeometryV2* combine( const QList< const QgsAbstractGeometryV2* > ) const = 0;
     virtual QgsAbstractGeometryV2* symDifference( const QgsAbstractGeometryV2& geom ) const = 0;
     virtual QgsAbstractGeometryV2* buffer( double distance, int segments ) const = 0;
+    virtual QgsAbstractGeometryV2* buffer( double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit ) const = 0;
     virtual QgsAbstractGeometryV2* simplify( double tolerance ) const = 0;
     virtual QgsAbstractGeometryV2* interpolate( double distance ) const = 0;
     virtual bool centroid( QgsPointV2& pt ) const = 0;

src/core/geometry/qgsgeos.cpp

@@ -1184,6 +1184,28 @@ QgsAbstractGeometryV2* QgsGeos::buffer( double distance, int segments ) const
   return fromGeos( geos );
 }
 
+QgsAbstractGeometryV2 *QgsGeos::buffer( double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit ) const
+{
+  if ( !mGeos )
+  {
+    return 0;
+  }
+
+#if defined(GEOS_VERSION_MAJOR) && defined(GEOS_VERSION_MINOR) && \
+ ((GEOS_VERSION_MAJOR>3) || ((GEOS_VERSION_MAJOR==3) && (GEOS_VERSION_MINOR>=3)))
+
+  GEOSGeometry* geos = 0;
+  try
+  {
+    geos = GEOSBufferWithStyle_r( geosinit.ctxt, mGeos, distance, segments, endCapStyle, joinStyle, mitreLimit );
+  }
+  CATCH_GEOS( 0 );
+  return fromGeos( geos );
+#else
+  return 0;
+#endif //0
+}
+
 QgsAbstractGeometryV2* QgsGeos::simplify( double tolerance ) const
 {
   if ( !mGeos )

src/core/geometry/qgsgeos.h

@@ -40,6 +40,7 @@ class CORE_EXPORT QgsGeos: public QgsGeometryEngine
     QgsAbstractGeometryV2* combine( const QList< const QgsAbstractGeometryV2* > ) const override;
     QgsAbstractGeometryV2* symDifference( const QgsAbstractGeometryV2& geom ) const override;
     QgsAbstractGeometryV2* buffer( double distance, int segments ) const override;
+    QgsAbstractGeometryV2* buffer( double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit ) const override;
     QgsAbstractGeometryV2* simplify( double tolerance ) const override;
     QgsAbstractGeometryV2* interpolate( double distance ) const override;
     bool centroid( QgsPointV2& pt ) const override;