ITK  4.6.0
Insight Segmentation and Registration Toolkit
itkImageRegionConstIterator.h
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18 #ifndef __itkImageRegionConstIterator_h
19 #define __itkImageRegionConstIterator_h
20 
21 #include "itkImageIterator.h"
22 
23 namespace itk
24 {
106 template< typename TImage >
108 {
109 public:
113 
118  itkStaticConstMacro(ImageIteratorDimension, unsigned int,
120 
128  typedef typename Superclass::SizeType SizeType;
137 
140 
143  {
144  m_SpanBeginOffset = 0;
145  m_SpanEndOffset = 0;
146  }
147 
151  const RegionType & region):
152  ImageConstIterator< TImage >(ptr, region)
153  {
155  m_SpanEndOffset = this->m_BeginOffset + static_cast< OffsetValueType >( this->m_Region.GetSize()[0] );
156  }
158 
166  {
168 
169  IndexType ind = this->GetIndex();
170  m_SpanEndOffset = this->m_Offset + static_cast< OffsetValueType >( this->m_Region.GetSize()[0] )
171  - ( ind[0] - this->m_Region.GetIndex()[0] );
173  - static_cast< OffsetValueType >( this->m_Region.GetSize()[0] );
174  }
175 
183  {
185 
186  IndexType ind = this->GetIndex();
187  m_SpanEndOffset = this->m_Offset + static_cast< OffsetValueType >( this->m_Region.GetSize()[0] )
188  - ( ind[0] - this->m_Region.GetIndex()[0] );
190  - static_cast< OffsetValueType >( this->m_Region.GetSize()[0] );
191  }
192 
195  void GoToBegin()
196  {
198 
199  // reset the span offsets
201  m_SpanEndOffset = this->m_BeginOffset + static_cast< OffsetValueType >( this->m_Region.GetSize()[0] );
202  }
203 
206  void GoToEnd()
207  {
209 
210  // reset the span offsets
212  m_SpanBeginOffset = m_SpanEndOffset - static_cast< OffsetValueType >( this->m_Region.GetSize()[0] );
213  }
214 
218  itkLegacyMacro(Self Begin(void) const);
219 
223  itkLegacyMacro(Self End(void) const);
224 
228  void SetIndex(const IndexType & ind)
229  {
231  m_SpanEndOffset = this->m_Offset + static_cast< OffsetValueType >( this->m_Region.GetSize()[0] )
232  - ( ind[0] - this->m_Region.GetIndex()[0] );
233  m_SpanBeginOffset = m_SpanEndOffset - static_cast< OffsetValueType >( this->m_Region.GetSize()[0] );
234  }
236 
244  Self &
246  {
247  if ( ++this->m_Offset >= m_SpanEndOffset )
248  {
249  this->Increment();
250  }
251  return *this;
252  }
254 
263  {
264  if ( --this->m_Offset < m_SpanBeginOffset )
265  {
266  this->Decrement();
267  }
268  return *this;
269  }
271 
272 protected:
273  OffsetValueType m_SpanBeginOffset; // one pixel before the beginning of the span
274  // (row)
275  OffsetValueType m_SpanEndOffset; // one pixel past the end of the span (row)
276 
277 private:
278  void Increment(); // advance in a direction other than the fastest moving
279 
280  void Decrement(); // go back in a direction other than the fastest moving
281 };
282 } // end namespace itk
283 
284 #ifndef ITK_MANUAL_INSTANTIATION
285 #include "itkImageRegionConstIterator.hxx"
286 #endif
287 
288 #endif
signed long OffsetValueType
Definition: itkIntTypes.h:154
Superclass::InternalPixelType InternalPixelType
ImageRegionConstIterator(const ImageConstIterator< TImage > &it)
A multi-dimensional iterator templated over image type.
const IndexType GetIndex() const
Superclass::PixelContainerPointer PixelContainerPointer
ImageRegionConstIterator(const ImageIterator< TImage > &it)
A multi-dimensional image iterator templated over image type.
Self & operator=(const Self &it)
static const unsigned int ImageIteratorDimension
ImageType::InternalPixelType InternalPixelType
virtual void SetIndex(const IndexType &ind)
A multi-dimensional iterator templated over image type that walks a region of pixels.
itkLegacyMacro(Self Begin(void) const)
static const unsigned int ImageIteratorDimension
ImageRegionConstIterator(const ImageType *ptr, const RegionType &region)
ImageConstIterator< TImage > Superclass
Superclass::PixelContainer PixelContainer