vtkXMLStructuredDataReader.h

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

  Program:   Visualization Toolkit
  Module:    vtkXMLStructuredDataReader.h

  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 "vtkIOXMLModule.h" // For export macro
#include "vtkXMLDataReader.h"


class VTKIOXML_EXPORT vtkXMLStructuredDataReader : public vtkXMLDataReader
{
public:
  vtkTypeMacro(vtkXMLStructuredDataReader,vtkXMLDataReader);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  vtkIdType GetNumberOfPoints() override;

  vtkIdType GetNumberOfCells() override;


  vtkSetMacro(WholeSlices, vtkTypeBool);
  vtkGetMacro(WholeSlices, vtkTypeBool);
  vtkBooleanMacro(WholeSlices, vtkTypeBool);

  void CopyOutputInformation(vtkInformation *outInfo, int port) override;

protected:
  vtkXMLStructuredDataReader();
  ~vtkXMLStructuredDataReader() override;

  virtual void SetOutputExtent(int* extent)=0;
  int ReadPrimaryElement(vtkXMLDataElement* ePrimary) override;

  // Pipeline execute data driver.  Called by vtkXMLReader.
  void ReadXMLData() override;

  void SetupOutputInformation(vtkInformation *outInfo) override;

  // 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.
  vtkTypeBool WholeSlices;

  // The update extent and corresponding increments and dimensions.
  int UpdateExtent[6];
  int PointDimensions[3];
  int CellDimensions[3];
  vtkIdType PointIncrements[3];
  vtkIdType CellIncrements[3];

  int WholeExtent[6];

  // The extent currently being read.
  int SubExtent[6];
  int SubPointDimensions[3];
  int SubCellDimensions[3];

  // Override methods from superclass.
  void SetupEmptyOutput() override;
  void SetupPieces(int numPieces) override;
  void DestroyPieces() override;
  int ReadArrayForPoints(vtkXMLDataElement* da,
    vtkAbstractArray* outArray) override;
  int ReadArrayForCells(vtkXMLDataElement* da,
    vtkAbstractArray* outArray) override;

  // Internal utility methods.
  int ReadPiece(vtkXMLDataElement* ePiece) override;
  virtual int ReadSubExtent(
    int* inExtent, int* inDimensions, vtkIdType* inIncrements,
    int* outExtent,int* outDimensions,vtkIdType* outIncrements,
    int* subExtent, int* subDimensions, vtkXMLDataElement* da,
    vtkAbstractArray* array, FieldType type);

private:
  vtkXMLStructuredDataReader(const vtkXMLStructuredDataReader&) = delete;
  void operator=(const vtkXMLStructuredDataReader&) = delete;
};

#endif