ossimOgrVectorTileSource.h

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//*******************************************************************
// Copyright (C) 2000 ImageLinks Inc.
//
// License:  LGPL
// 
// See LICENSE.txt file in the top level directory for more details.
//
// Author:  Mingjie Su
//
// Description:
//
// Contains class definition for the class "ossimOgrVectorTileSource".
// ossimOgrVectorTileSource is derived from ImageHandler which is derived from
// TileSource. It is for displaying the information from OGR vector dataset
// like SDE and VPF.
//
//*******************************************************************
//  $Id: ossimOgrVectorTileSource.h 1347 2010-08-23 17:03:06Z oscar.kramer $

#ifndef ossimOgrVectorTileSource_HEADER
#define ossimOgrVectorTileSource_HEADER
#include <vector>
#include <list>
#include <map>

#include <ossim/imaging/ossimImageHandler.h>
#include <ossim/base/ossimIrect.h>
#include <ossim/base/ossimDrect.h>

//OGR Includes
  // #include <ogrsf_frmts/ogrsf_frmts.h>
#include <ogrsf_frmts.h>
#include <gdal.h>

class ossimProjection;
class ossimMapProjection;
class ossimImageProjectionModel;
class ossimOgrVectorLayerNode;

class ossimOgrVectorTileSource :
   public ossimImageHandler
{
public:
   ossimOgrVectorTileSource();
   virtual ~ossimOgrVectorTileSource();

   virtual void close();

   virtual bool open();

   virtual ossimRefPtr<ossimImageData> getTile(const ossimIrect& tileRect,
                                               ossim_uint32 resLevel=0);

   virtual ossim_uint32 getNumberOfInputBands() const;

   virtual ossim_uint32 getNumberOfOutputBands() const;
  
   virtual ossim_uint32 getNumberOfLines(ossim_uint32 reduced_res_level = 0) const;

   virtual ossim_uint32 getNumberOfSamples(ossim_uint32 reduced_res_level = 0) const;

   virtual ossim_uint32 getNumberOfDecimationLevels() const;

   virtual ossimIrect getImageRectangle(ossim_uint32 reduced_res_level = 0) const;

   virtual bool saveState(ossimKeywordlist& kwl,
                          const char* prefix=0)const;

   virtual bool loadState(const ossimKeywordlist& kwl,
                          const char* prefix=0);
   
   virtual ossimRefPtr<ossimImageGeometry> getInternalImageGeometry() const;

   virtual ossimRefPtr<ossimImageGeometry> getImageGeometry();

   virtual ossimScalarType getOutputScalarType() const;

   virtual ossim_uint32 getTileWidth() const;
   
   virtual ossim_uint32 getTileHeight() const;

   virtual ossim_uint32 getImageTileWidth() const;

   virtual ossim_uint32 getImageTileHeight() const;   

   virtual bool isOpen()const;
   
   virtual double getNullPixelValue(ossim_uint32 band=0)const;

   virtual double getMinPixelValue(ossim_uint32 band=0)const;
      
   virtual double getMaxPixelValue(ossim_uint32 band=0)const;

   virtual bool setCurrentEntry(ossim_uint32 entryIdx);

   virtual ossim_uint32 getNumberOfEntries()const;
   
   virtual void getEntryList(std::vector<ossim_uint32>& entryList) const;

   ossimProjection* createProjFromReference(OGRSpatialReference* reference) const;

   ossimMapProjection* createDefaultProj();

   bool isOgrVectorDataSource()const;

private:
   std::vector<ossimOgrVectorLayerNode*> theLayerVector;
   OGRDataSource*                      theDataSource;
   ossimRefPtr<ossimImageGeometry>     theImageGeometry;
   ossimDrect                          theImageBound;
   OGREnvelope                         theBoundingExtent;
TYPE_DATA
};

#endif