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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageIterator.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 vtkImageIterator - a simple image iterator
// .SECTION Description
// This is a simple image iterator that can be used to iterate over an
// image. This should be used internally by Filter writers.
// .SECTION See also
// vtkImageData vtkImageProgressIterator
#ifndef __vtkImageIterator_h
#define __vtkImageIterator_h
#include "vtkSystemIncludes.h"
class vtkImageData;
template<class DType>
class VTK_FILTERING_EXPORT vtkImageIterator
{
public:
typedef DType *SpanIterator;
// Description:
// Default empty constructor, usefull only when creating an array of iterators
// You need to call Initialize afterward
vtkImageIterator();
// Description:
// Create an image iterator for a given image data and a given extent
vtkImageIterator(vtkImageData *id, int *ext);
// Description:
// Initialize the image iterator for a given image data, and given extent
void Initialize(vtkImageData *id, int *ext);
// Description:
// Move the iterator to the next span
void NextSpan();
// Description:
// Return an iterator (pointer) for the span
SpanIterator BeginSpan()
{
return this->Pointer;
}
// Description:
// Return an iterator (pointer) for the end of the span
SpanIterator EndSpan()
{
return this->SpanEndPointer;
}
// Description:
// Test if the end of the extent has been reached
int IsAtEnd()
{
return (this->Pointer >= this->EndPointer);
}
protected:
DType *Pointer;
DType *SpanEndPointer;
DType *SliceEndPointer;
DType *EndPointer;
vtkIdType Increments[3];
vtkIdType ContinuousIncrements[3];
};
#ifdef VTK_NO_EXPLICIT_TEMPLATE_INSTANTIATION
#include "vtkImageIterator.txx"
#endif
#endif
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