ITK  4.2.0
Insight Segmentation and Registration Toolkit
itkImageToImageFilterDetail.h
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18 /*=========================================================================
19  *
20  * Portions of this file are subject to the VTK Toolkit Version 3 copyright.
21  *
22  * Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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28 #ifndef __itkImageToImageFilterDetail_h
29 #define __itkImageToImageFilterDetail_h
30 
31 #include "itkImageRegion.h"
32 #include "itkSmartPointer.h"
33 
34 namespace itk
35 {
44 namespace ImageToImageFilterDetail
45 {
46 
55 struct DispatchBase {};
56 
64 template< bool >
65 struct BooleanDispatch {};
66 
75 template< int >
76 struct IntDispatch:public DispatchBase {};
77 
92 template< unsigned int >
95 
103 template< bool B1, bool B2 >
105 
110 };
111 
118 template< int D1, int D2 >
120 
125 };
126 
138 template< unsigned int D1, unsigned int D2 >
140 
145 
161  typedef IntDispatch < ( D1 > D2 ) - ( D1 < D2 ) > ComparisonType;
165 };
166 
183 template< unsigned int D1, unsigned int D2 >
186  ImageRegion< D1 > & destRegion,
187  const ImageRegion< D2 > & srcRegion)
188 {
189  destRegion = srcRegion;
190 }
191 
208 template< unsigned int D1, unsigned int D2 >
211  ImageRegion< D1 > & destRegion,
212  const ImageRegion< D2 > & srcRegion)
213 {
214  // Source dimension is greater than the destination dimension, copy the
215  // first part of the source into the destination
216  unsigned int dim;
217 
218  Index< D1 > destIndex;
219  Size< D1 > destSize;
220  const Index< D2 > & srcIndex = srcRegion.GetIndex();
221  const Size< D2 > & srcSize = srcRegion.GetSize();
222 
223  // copy what we can
224  for ( dim = 0; dim < D1; ++dim )
225  {
226  destIndex[dim] = srcIndex[dim];
227  destSize[dim] = srcSize[dim];
228  }
229 
230  destRegion.SetIndex(destIndex);
231  destRegion.SetSize(destSize);
232 }
233 
250 template< unsigned int D1, unsigned int D2 >
253  ImageRegion< D1 > & destRegion,
254  const ImageRegion< D2 > & srcRegion)
255 {
256  // Source dimension is less than the destination dimension, copy source
257  // into the first part of the destination and set zeros elsewhere.
258  unsigned int dim;
259 
260  Index< D1 > destIndex;
261  Size< D1 > destSize;
262  const Index< D2 > & srcIndex = srcRegion.GetIndex();
263  const Size< D2 > & srcSize = srcRegion.GetSize();
264 
265  // copy what we can
266  for ( dim = 0; dim < D2; ++dim )
267  {
268  destIndex[dim] = srcIndex[dim];
269  destSize[dim] = srcSize[dim];
270  }
271  // fill in the rest of the dimensions with zero/one
272  for (; dim < D1; ++dim )
273  {
274  destIndex[dim] = 0;
275  destSize[dim] = 1;
276  }
277 
278  destRegion.SetIndex(destIndex);
279  destRegion.SetSize(destSize);
280 }
281 
320 template< unsigned int D1, unsigned int D2 >
321 class ITK_EXPORT ImageRegionCopier
322 {
323 public:
324  virtual void operator()(ImageRegion< D1 > & destRegion,
325  const ImageRegion< D2 > & srcRegion) const
326  {
327  typedef typename BinaryUnsignedIntDispatch< D1, D2 >::ComparisonType ComparisonType;
328  ImageToImageFilterDefaultCopyRegion< D1, D2 >(
329  ComparisonType(),
330  destRegion, srcRegion);
331  }
332 
333  virtual ~ImageRegionCopier() {}
334 };
335 
338 template< unsigned int D1, unsigned int D2 >
339 std::ostream & operator<<(std::ostream & os,
341 {
342  os << "ImageRegionCopier: "
343  << typeid( ImageRegionCopier< D1, D2 > ).name() << std::endl;
344  return os;
345 }
347 
349 template< unsigned int D1, unsigned int D2 >
351  const ImageRegionCopier< D1, D2 > & c2)
352 {
353  return &c1 != &c2;
354 }
355 } // end of namespace ImageToImageFilterDetail
356 } // end namespace itk
357 
358 #endif
359