vtkImageStencilIterator.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkImageStencilIterator.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 vtkImageStencilIterator_h
#define vtkImageStencilIterator_h
 
#include "vtkSystemIncludes.h"
#include "vtkImagingCoreModule.h"
class vtkImageData;
class vtkImageStencilData;
class vtkAlgorithm;
 
template<class DType>
class VTKIMAGINGCORE_EXPORT vtkImageStencilIterator
{
public:
  vtkImageStencilIterator();
 
 
  vtkImageStencilIterator(
    vtkImageData *image, vtkImageStencilData *stencil, int extent[6],
    vtkAlgorithm *algorithm=0, int threadId=0);
 
 
  void Initialize(
    vtkImageData *image, vtkImageStencilData *stencil, int extent[6]);
 
 
  bool IsInStencil()
    {
    return this->InStencil;
    }
 
  void NextSpan();
 
 
  bool IsAtEnd()
    {
    return (this->Pointer == this->EndPointer);
    }
 
 
  DType *BeginSpan()
    {
    return this->Pointer;
    }
 
 
  DType *EndSpan()
    {
    return this->SpanEndPointer;
    }
 
protected:
 
  void SetSpanState(int idX);
 
  void ReportProgress();
 
  // Pointers
  DType     *Pointer;           // current iterator position within data
  DType     *SpanEndPointer;    // end of current span
  DType     *RowEndPointer;     // end of current row
  DType     *SliceEndPointer;   // end of current slice
  DType     *EndPointer;        // end of data
 
  // Increments
  vtkIdType  PixelIncrement;    // to next pixel
  vtkIdType  RowIncrement;      // to same position in next row
  vtkIdType  SliceIncrement;    // to same position in next slice
  vtkIdType  RowEndIncrement;   // from end of row to start of next row
  vtkIdType  SliceEndIncrement; // from end of slice to start of next slice
 
  // Stencil-related items
  bool       HasStencil;
  bool       InStencil;
  int        SpanSliceEndIncrement;
  int        SpanSliceIncrement;
  int        SpanMinX;
  int        SpanMaxX;
  int        SpanMinY;
  int        SpanMaxY;
  int        SpanMinZ;
  int        SpanMaxZ;
  int        SpanIndexX;
  int        SpanIndexY;
  int        SpanIndexZ;
  int       *SpanCountPointer;
  int      **SpanListPointer;
 
  // Progress-related items
  vtkAlgorithm *Algorithm;
  vtkIdType  Count;
  vtkIdType  Target;
};
 
#ifdef VTK_NO_EXPLICIT_TEMPLATE_INSTANTIATION
#include "vtkImageStencilIterator.txx"
#endif
 
#endif
// VTK-HeaderTest-Exclude: vtkImageStencilIterator.h