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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkImageIterateFilter.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 vtkImageIterateFilter - Multiple executes per update.
// .SECTION Description
// vtkImageIterateFilter is a filter superclass that supports calling execute
// multiple times per update. The largest hack/open issue is that the input
// and output caches are temporarily changed to "fool" the subclasses. I
// believe the correct solution is to pass the in and out cache to the
// subclasses methods as arguments. Now the data is passes. Can the caches
// be passed, and data retrieved from the cache?
#ifndef __vtkImageIterateFilter_h
#define __vtkImageIterateFilter_h
#include "vtkThreadedImageAlgorithm.h"
class VTK_IMAGING_EXPORT vtkImageIterateFilter : public vtkThreadedImageAlgorithm
{
public:
vtkTypeRevisionMacro(vtkImageIterateFilter,vtkThreadedImageAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Get which iteration is current being performed. Normally the
// user will not access this method.
vtkGetMacro(Iteration,int);
vtkGetMacro(NumberOfIterations,int);
protected:
vtkImageIterateFilter();
~vtkImageIterateFilter();
// Implement standard requests by calling iterative versions the
// specified number of times.
virtual int RequestUpdateExtent(vtkInformation*,
vtkInformationVector**,
vtkInformationVector*);
virtual int RequestInformation (vtkInformation*,
vtkInformationVector**,
vtkInformationVector*);
virtual int RequestData(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector);
// Iterative versions of standard requests. These are given the
// pipeline information object for the in/out pair at each
// iteration.
virtual int IterativeRequestInformation(vtkInformation* in,
vtkInformation* out);
virtual int IterativeRequestUpdateExtent(vtkInformation* in,
vtkInformation* out);
virtual int IterativeRequestData(vtkInformation*,
vtkInformationVector**,
vtkInformationVector*);
virtual void SetNumberOfIterations(int num);
// for filters that execute multiple times.
int NumberOfIterations;
int Iteration;
// A list of intermediate caches that is created when
// is called SetNumberOfIterations()
vtkImageData **IterationData;
// returns correct vtkImageDatas based on current iteration.
vtkImageData *GetIterationInput();
vtkImageData *GetIterationOutput();
vtkInformationVector* InputVector;
vtkInformationVector* OutputVector;
private:
vtkImageIterateFilter(const vtkImageIterateFilter&); // Not implemented.
void operator=(const vtkImageIterateFilter&); // Not implemented.
};
#endif
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