vtkImageStencilIterator.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkImageStencilIterator_h
#define vtkImageStencilIterator_h
 
#include "vtkImagePointDataIterator.h"
 
VTK_ABI_NAMESPACE_BEGIN
template <class DType>
class VTKIMAGINGCORE_EXPORT vtkImageStencilIterator : public vtkImagePointDataIterator
{
public:
 
  vtkImageStencilIterator()
  {
    this->Increment = 0;
    this->BasePointer = nullptr;
    this->Pointer = nullptr;
    this->SpanEndPointer = nullptr;
  }
 
 
  vtkImageStencilIterator(vtkImageData* image, vtkImageStencilData* stencil = nullptr,
    const int extent[6] = nullptr, vtkAlgorithm* algorithm = nullptr, int threadId = 0)
    : vtkImagePointDataIterator(image, extent, stencil, algorithm, threadId)
  {
    this->BasePointer =
      static_cast<DType*>(vtkImagePointDataIterator::GetVoidPointer(image, 0, &this->Increment));
    this->UpdatePointer();
  }
 
 
  void Initialize(vtkImageData* image, vtkImageStencilData* stencil = nullptr,
    const int extent[6] = nullptr, vtkAlgorithm* algorithm = nullptr, int threadId = 0)
  {
    this->vtkImagePointDataIterator::Initialize(image, extent, stencil, algorithm, threadId);
    this->BasePointer =
      static_cast<DType*>(vtkImagePointDataIterator::GetVoidPointer(image, 0, &this->Increment));
    this->UpdatePointer();
  }
 
 
  void NextSpan()
  {
    this->vtkImagePointDataIterator::NextSpan();
    this->UpdatePointer();
  }
 
  bool IsAtEnd() { return this->vtkImagePointDataIterator::IsAtEnd(); }
 
  DType* BeginSpan() { return this->Pointer; }
 
  DType* EndSpan() { return this->SpanEndPointer; }
 
protected:
 
  void UpdatePointer()
  {
    this->Pointer = this->BasePointer + this->Id * this->Increment;
    this->SpanEndPointer = this->BasePointer + this->SpanEnd * this->Increment;
  }
 
  // The pointer must be incremented by this amount for each pixel.
  int Increment;
 
  // Pointers
  DType* BasePointer;    // pointer to the first voxel
  DType* Pointer;        // current iterator position within data
  DType* SpanEndPointer; // end of current span
};
 
#ifndef vtkImageStencilIterator_cxx
#ifdef _MSC_VER
#pragma warning(push)
// The following is needed when the vtkImageStencilIterator template
// class is declared dllexport and is used within vtkImagingCore
#pragma warning(disable : 4910) // extern and dllexport incompatible
#endif
vtkExternTemplateMacro(extern template class VTKIMAGINGCORE_EXPORT vtkImageStencilIterator);
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif
 
VTK_ABI_NAMESPACE_END
#endif
// VTK-HeaderTest-Exclude: vtkImageStencilIterator.h