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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkDefaultVectorPixelAccessor.h.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:34 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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PURPOSE. See the above copyright notices for more information. |
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=========================================================================*/ |
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#ifndef __itkDefaultVectorPixelAccessor_h |
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#define __itkDefaultVectorPixelAccessor_h |
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#include "itkMacro.h" |
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#include "itkVariableLengthVector.h" |
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namespace itk |
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{ |
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/** \class DefaultVectorPixelAccessor |
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* \brief Give access to partial aspects of a type |
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* |
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* DefaultVectorPixelAccessor is specifically meant to provide VectorImage |
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* with the same \c DefaultPixelAccessor interface that |
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* DefaultPixelAccessor provides to Image. |
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* |
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* The template paramters is the type that is contained in by the elements of |
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* a vector. |
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* |
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* The class also contains a m_VectorLength paramter, set with the SetVectorLength |
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* method to set the length of the vectors. This must be set before the accessor |
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* can be used. This is the length of each of the vector containers. |
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* |
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* \note |
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* This work is part of the National Alliance for Medical Image Computing |
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* (NAMIC), funded by the National Institutes of Health through the NIH Roadmap |
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* for Medical Research, Grant U54 EB005149. |
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* |
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* \ingroup ImageAdaptors |
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*/ |
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template <class TType > |
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class ITK_EXPORT DefaultVectorPixelAccessor |
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{ |
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public: |
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typedef unsigned int VectorLengthType; |
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/** External typedef. It defines the external aspect |
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* that this class will exhibit. Here it is an VariableLengthVector. The container does not |
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* manage the memory. In other words it is an array reference with the contents |
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* pointing to the actual data in the image. */ |
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typedef VariableLengthVector< TType > ExternalType; |
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/** Internal typedef. It defines the internal real representation of data. */ |
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typedef TType InternalType; |
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/** Set output using the value in input */ |
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inline void Set(InternalType & output, const ExternalType & input, |
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const unsigned long offset ) const |
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{ |
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InternalType *truePixel = (&output) + offset*m_OffsetMultiplier; |
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for( VectorLengthType i=0; i< m_VectorLength; i++ ) |
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{ |
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truePixel[i] = input[i]; |
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} |
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} |
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/** Get the value from input */ |
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inline ExternalType Get( const InternalType & input, const unsigned long offset ) const |
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{ |
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ExternalType output( (&input)+(offset*m_OffsetMultiplier) , m_VectorLength ); |
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return output; |
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} |
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/** Set the length of each vector in the VectorImage */ |
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void SetVectorLength( VectorLengthType l) |
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{ |
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m_VectorLength = l; |
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m_OffsetMultiplier = (l-1); |
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} |
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/** Get Vector lengths */ |
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VectorLengthType GetVectorLength() const { return m_VectorLength; } |
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DefaultVectorPixelAccessor() {} |
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/** Constructor to initialize VectorLength at construction time */ |
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DefaultVectorPixelAccessor( VectorLengthType l ) |
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{ |
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m_VectorLength = l; |
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m_OffsetMultiplier = l-1; |
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} |
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virtual ~DefaultVectorPixelAccessor() {}; |
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private: |
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VectorLengthType m_VectorLength; |
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VectorLengthType m_OffsetMultiplier; |
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}; |
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} // end namespace itk |
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#endif |
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EOF |
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