text: /******************************************************************************
   * $Id$
   *
   * Project:  OpenGIS Simple Features Reference Implementation
   * Purpose:  Defines OGRWarpedLayer class
   * Author:   Even Rouault, even dot rouault at mines dash paris dot org
   *
   ******************************************************************************
   * Copyright (c) 2012-2014, Even Rouault <even dot rouault at mines-paris dot org>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included
   * in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   ****************************************************************************/
  
  #ifndef _OGRWARPEDLAYER_H_INCLUDED
  #define _OGRWARPEDLAYER_H_INCLUDED
  
  #include "ogrlayerdecorator.h"
  
  /************************************************************************/
  /*                           OGRWarpedLayer                             */
  /************************************************************************/
  
  class OGRWarpedLayer : public OGRLayerDecorator
  {
    protected:
        OGRFeatureDefn              *m_poFeatureDefn;
        int                          m_iGeomField;
  
        OGRCoordinateTransformation *m_poCT;
        OGRCoordinateTransformation *m_poReversedCT; /* may be NULL */
        OGRSpatialReference         *m_poSRS;
  
        OGREnvelope                  sStaticEnvelope;
  
        static int ReprojectEnvelope( OGREnvelope* psEnvelope,
                                      OGRCoordinateTransformation* poCT );
  
        OGRFeature *                 SrcFeatureToWarpedFeature(OGRFeature* poFeature);
        OGRFeature *                 WarpedFeatureToSrcFeature(OGRFeature* poFeature);
  
    public:
  
                         OGRWarpedLayer(OGRLayer* poDecoratedLayer,
                                        int iGeomField,
                                        int bTakeOwnership,
                                        OGRCoordinateTransformation* poCT,  /* must NOT be NULL, ownership acquired by OGRWarpedLayer */
                                        OGRCoordinateTransformation* poReversedCT /* may be NULL, ownership acquired by OGRWarpedLayer */);
      virtual           ~OGRWarpedLayer();
  
      void                SetExtent(double dfXMin, double dfYMin, double dfXMax, double dfYMax);
  
      virtual void        SetSpatialFilter( OGRGeometry * );
      virtual void        SetSpatialFilterRect( double dfMinX, double dfMinY,
                                                double dfMaxX, double dfMaxY );
      virtual void        SetSpatialFilter( int iGeomField, OGRGeometry * );
      virtual void        SetSpatialFilterRect( int iGeomField, double dfMinX, double dfMinY,
                                                double dfMaxX, double dfMaxY );
  
      virtual OGRFeature *GetNextFeature();
      virtual OGRFeature *GetFeature( long nFID );
      virtual OGRErr      SetFeature( OGRFeature *poFeature );
      virtual OGRErr      CreateFeature( OGRFeature *poFeature );
  
      virtual OGRFeatureDefn *GetLayerDefn();
  
      virtual OGRSpatialReference *GetSpatialRef();
  
      virtual int         GetFeatureCount( int bForce = TRUE );
      virtual OGRErr      GetExtent(int iGeomField, OGREnvelope *psExtent, int bForce = TRUE);
      virtual OGRErr      GetExtent(OGREnvelope *psExtent, int bForce = TRUE);
  
      virtual int         TestCapability( const char * );
  };
  
  #endif //  _OGRWARPEDLAYER_H_INCLUDED
  