Merge pull request #1249 from Oslandia/expose_simplifier

Expose QgsMapToPixelSimplifier to Python

python/core/core.sip

@@ -37,6 +37,7 @@
 %Include qgsgeometry.sip
 %Include qgsgeometryvalidator.sip
 %Include qgsgeometrysimplifier.sip
+%Include qgsmaptopixelgeometrysimplifier.sip
 %Include qgsgml.sip
 %Include qgsgmlschema.sip
 %Include qgshttptransaction.sip

python/core/qgsmaptopixelgeometrysimplifier.sip

@@ -0,0 +1,39 @@
+class QgsMapToPixelSimplifier : public QgsAbstractGeometrySimplifier
+{
+%TypeHeaderCode
+#include "qgsmaptopixelgeometrysimplifier.h"
+%End
+  public:
+    QgsMapToPixelSimplifier( int simplifyFlags, double tolerance );
+    virtual ~QgsMapToPixelSimplifier();
+
+    //! Applicable simplification flags
+    enum SimplifyFlag
+    {
+      NoFlags          = 0, //!< No simplification can be applied
+      SimplifyGeometry = 1, //!< The geometries can be simplified using the current map2pixel context state
+      SimplifyEnvelope = 2, //!< The geometries can be fully simplified by its BoundingBox
+    };
+
+  public:
+    int simplifyFlags() const;
+    void setSimplifyFlags( int simplifyFlags );
+
+    //! Returns a simplified version the specified geometry
+    virtual QgsGeometry* simplify( QgsGeometry* geometry ) const;
+    //! Simplifies the specified geometry
+    virtual bool simplifyGeometry( QgsGeometry* geometry ) const;
+
+    // MapToPixel simplification helper methods
+  public:
+
+    //! Returns whether the envelope can be replaced by its BBOX when is applied the specified map2pixel context
+    static bool canbeGeneralizedByMapBoundingBox( const QgsRectangle& envelope, double map2pixelTol );
+
+    //! Returns whether the envelope can be replaced by its BBOX when is applied the specified map2pixel context
+    bool canbeGeneralizedByMapBoundingBox( const QgsRectangle& envelope ) const;
+
+    //! Simplifies the geometry when is applied the specified map2pixel context
+    static bool simplifyGeometry( QgsGeometry* geometry, int simplifyFlags, double tolerance );
+
+};