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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkScalarToRGBPixelFunctor.txx.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:47 $ |
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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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DEF |
#ifndef _itkScalarToRGBPixelFunctor_txx |
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DEF |
#define _itkScalarToRGBPixelFunctor_txx |
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#include "itkScalarToRGBPixelFunctor.h" |
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namespace itk { |
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namespace Functor { |
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template <class TScalar> |
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ScalarToRGBPixelFunctor<TScalar> |
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::ScalarToRGBPixelFunctor() |
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{ |
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m_Index[0] = m_Index[1] = m_Index[2] = 0; |
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const ::size_t l = sizeof(ScalarType); |
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for (unsigned int i = 0; i < l && i < 3; ++i) |
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{ m_Index[i] = i; } |
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m_IsBigEndian = true; |
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#ifndef ITK_WORDS_BIGENDIAN |
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m_IsBigEndian = false; |
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#endif |
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} |
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template <class TScalar> |
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typename ScalarToRGBPixelFunctor<TScalar>::RGBPixelType |
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ScalarToRGBPixelFunctor<TScalar> |
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::operator()( const TScalar & v) const |
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{ |
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unsigned int i; |
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int j; |
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TScalar buf = v; |
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unsigned char *bytes = (unsigned char *)(&buf); |
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RGBPixelType ans; |
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if (this->m_IsBigEndian == true) |
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{ // swap bytes |
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TScalar tmp; |
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for (j = sizeof(TScalar) - 1, i = 0; j >=0 ; j--, i++) |
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{ ((unsigned char *)(&tmp))[i] = bytes[j]; } |
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buf = tmp; |
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} |
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ans[0] = static_cast<RGBComponentType>( bytes[m_Index[0]] * 3 ); |
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ans[1] = static_cast<RGBComponentType>( (bytes[m_Index[0]] + bytes[m_Index[1]]) * 5 ); |
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ans[2] = static_cast<RGBComponentType>( (bytes[m_Index[0]] + bytes[m_Index[2]]) ); |
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return ans; |
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} |
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} // end namespace Functor |
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} // end namespace itk |
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#endif |
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