vtkXMLStructuredDataReader.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkXMLStructuredDataReader.h,v $

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef __vtkXMLStructuredDataReader_h
#define __vtkXMLStructuredDataReader_h

#include "vtkXMLDataReader.h"


class VTK_IO_EXPORT vtkXMLStructuredDataReader : public vtkXMLDataReader
{
public:
  vtkTypeRevisionMacro(vtkXMLStructuredDataReader,vtkXMLDataReader);
  void PrintSelf(ostream& os, vtkIndent indent);  
  
  virtual vtkIdType GetNumberOfPoints();
  
  virtual vtkIdType GetNumberOfCells();
  

  vtkSetMacro(WholeSlices, int);
  vtkGetMacro(WholeSlices, int);
  vtkBooleanMacro(WholeSlices, int);
  
  virtual void CopyOutputInformation(vtkInformation *outInfo, int port);
protected:
  vtkXMLStructuredDataReader();
  ~vtkXMLStructuredDataReader();
  
  virtual void SetOutputExtent(int* extent)=0;
  int ReadPrimaryElement(vtkXMLDataElement* ePrimary);
  
  // Pipeline execute data driver.  Called by vtkXMLReader.
  void ReadXMLData();
  
  // Internal representation of pieces in the file that may have come
  // from a streamed write.
  int* PieceExtents;
  int* PiecePointDimensions;
  vtkIdType* PiecePointIncrements;
  int* PieceCellDimensions;
  vtkIdType* PieceCellIncrements;
  
  // Whether to read in whole slices mode.
  int WholeSlices;
  
  // The update extent and corresponding increments and dimensions.
  int UpdateExtent[6];
  int PointDimensions[3];
  int CellDimensions[3];
  vtkIdType PointIncrements[3];
  vtkIdType CellIncrements[3];
  
  // The extent currently being read.
  int SubExtent[6];
  int SubPointDimensions[3];
  int SubCellDimensions[3];
  
  // Override methods from superclass.
  void SetupEmptyOutput();
  void SetupPieces(int numPieces);
  void DestroyPieces();
  int ReadArrayForPoints(vtkXMLDataElement* da, vtkDataArray* outArray);
  int ReadArrayForCells(vtkXMLDataElement* da, vtkDataArray* outArray);
  
  // Internal utility methods.
  int ReadPiece(vtkXMLDataElement* ePiece);
  int ReadSubExtent(int* inExtent, int* inDimensions, vtkIdType* inIncrements,
                    int* outExtent,int* outDimensions,vtkIdType* outIncrements,
                    int* subExtent, int* subDimensions, vtkXMLDataElement* da,
                    vtkDataArray* array);
  
private:
  vtkXMLStructuredDataReader(const vtkXMLStructuredDataReader&);  // Not implemented.
  void operator=(const vtkXMLStructuredDataReader&);  // Not implemented.
};

#endif

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