libvtk6-dev 6.1.0+dfsg2-6 / usr / include / vtk-6.1 / 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.

=========================================================================*/
// .NAME vtkXMLStructuredDataReader - Superclass for structured data XML readers.
// .SECTION Description
// vtkXMLStructuredDataReader provides functionality common to all
// structured data format readers.

// .SECTION See Also
// vtkXMLImageDataReader vtkXMLStructuredGridReader
// vtkXMLRectilinearGridReader

#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);

  // Description:
  // Get the number of points in the output.
  virtual vtkIdType GetNumberOfPoints();

  // Description:
  // Get the number of cells in the output.
  virtual vtkIdType GetNumberOfCells();

  // Description:
  // Get/Set whether the reader gets a whole slice from disk when only
  // a rectangle inside it is needed.  This mode reads more data than
  // necessary, but prevents many short reads from interacting poorly
  // with the compression and encoding schemes.
  vtkSetMacro(WholeSlices, int);
  vtkGetMacro(WholeSlices, int);
  vtkBooleanMacro(WholeSlices, int);

  // Description:
  // For the specified port, copy the information this reader sets up in
  // SetupOutputInformation to outInfo
  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];

  int WholeExtent[6];

  // 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();
  virtual int ReadArrayForPoints(vtkXMLDataElement* da,
    vtkAbstractArray* outArray);
  virtual int ReadArrayForCells(vtkXMLDataElement* da,
    vtkAbstractArray* outArray);

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

private:
  vtkXMLStructuredDataReader(const vtkXMLStructuredDataReader&);  // Not implemented.
  void operator=(const vtkXMLStructuredDataReader&);  // Not implemented.
};

#endif

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