ogr_dgn.h

GIS系统支持库Geospatial Data Abstraction Library代码.GDAL is a translator library for raster geospatial dat

/******************************************************************************
 * $Id: ogr_dgn.h,v 1.10 2005/02/22 12:54:50 fwarmerdam Exp $
 *
 * Project:  OpenGIS Simple Features Reference Implementation
 * Purpose:  OGR Driver for DGN Reader.
 * Author:   Frank Warmerdam, [e-mail]
 *
 ******************************************************************************
 * Copyright (c) 2000, Frank Warmerdam ([e-mail])
 *
 * 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.
 ******************************************************************************
 *
 * $Log: ogr_dgn.h,v $
 * Revision 1.10  2005/02/22 12:54:50  fwarmerdam
 * use OGRLayer base spatial filter support
 *
 * Revision 1.9  2004/02/23 21:45:03  warmerda
 * added support for various link formats
 *
 * Revision 1.8  2003/05/21 03:42:01  warmerda
 * Expanded tabs
 *
 * Revision 1.7  2002/11/11 20:35:05  warmerda
 * added create support
 *
 * Revision 1.6  2002/10/29 19:45:29  warmerda
 * OGR driver now always builds an index if any features are to be read.  This
 * is primarily done to ensure that color tables appearing late in the file
 * will still affect feature elements occuring before them ... such as with
 * the m_epoche.dgn file.  Also implement fast feature counting and spatial
 * extents support based on the index.
 *
 * Revision 1.5  2002/05/31 19:03:46  warmerda
 * removed old CollectLines code
 *
 * Revision 1.4  2002/03/27 21:36:50  warmerda
 * added implementation of GetFeature()
 *
 * Revision 1.3  2002/02/22 22:18:44  warmerda
 * added support for commplex shapes
 *
 * Revision 1.2  2000/12/28 21:27:11  warmerda
 * updated email address
 *
 * Revision 1.1  2000/11/28 19:03:53  warmerda
 * New
 *
 */

#ifndef _OGR_DGN_H_INCLUDED
#define _OGR_DGN_H_INLLUDED

#include "dgnlib.h"
#include "ogrsf_frmts.h"

/************************************************************************/
/*                            OGRDGNLayer                               */
/************************************************************************/

class OGRDGNLayer : public OGRLayer
{
    OGRFeatureDefn     *poFeatureDefn;

    int                 iNextShapeId;
    int                 nTotalShapeCount;

    DGNHandle           hDGN;
    int                 bUpdate;

    char               *pszLinkFormat;

    OGRFeature         *ElementToFeature( DGNElemCore * );

    void                ConsiderBrush( DGNElemCore *, const char *pszPen,
                                       OGRFeature *poFeature );

    DGNElemCore       **LineStringToElementGroup( OGRLineString *, int );
    DGNElemCore       **TranslateLabel( OGRFeature * );

    int                 bHaveSimpleQuery;
    OGRFeature         *poEvalFeature;

  public:
                        OGRDGNLayer( const char * pszName, DGNHandle hDGN,
                                     int bUpdate );
                        ~OGRDGNLayer();

    void                SetSpatialFilter( OGRGeometry * );

    void                ResetReading();
    OGRFeature *        GetNextFeature();
    OGRFeature *        GetFeature( long nFeatureId );

    virtual int         GetFeatureCount( int bForce = TRUE );
    virtual OGRErr      GetExtent(OGREnvelope *psExtent, int bForce = TRUE);

    OGRFeatureDefn *    GetLayerDefn() { return poFeatureDefn; }

    int                 TestCapability( const char * );

    OGRErr              CreateFeature( OGRFeature *poFeature );
};

/************************************************************************/
/*                          OGRDGNDataSource                            */
/************************************************************************/

class OGRDGNDataSource : public OGRDataSource
{
    OGRDGNLayer     **papoLayers;
    int                 nLayers;
    
    char                *pszName;
    DGNHandle           hDGN;

    char                **papszOptions;
    
  public:
                        OGRDGNDataSource();
                        ~OGRDGNDataSource();

    int                 Open( const char *, int bTestOpen, int bUpdate );
    int                 PreCreate( const char *, char ** );

    OGRLayer           *CreateLayer( const char *, 
                                     OGRSpatialReference * = NULL,
                                     OGRwkbGeometryType = wkbUnknown,
                                     char ** = NULL );

    const char          *GetName() { return pszName; }
    int                 GetLayerCount() { return nLayers; }
    OGRLayer            *GetLayer( int );

    int                 TestCapability( const char * );
};

/************************************************************************/
/*                            OGRDGNDriver                              */
/************************************************************************/

class OGRDGNDriver : public OGRSFDriver
{
  public:
                ~OGRDGNDriver();
                
    const char *GetName();
    OGRDataSource *Open( const char *, int );
    OGRDataSource *CreateDataSource( const char *, char ** );

    int                 TestCapability( const char * );
};


#endif /* ndef _OGR_DGN_H_INCLUDED */