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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.
=========================================================================*/
// .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 "vtkXMLDataReader.h"
class VTK_IO_EXPORT vtkXMLStructuredDataReader : public vtkXMLDataReader
{
public:
vtkTypeRevisionMacro(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];
// 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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