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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkRGBAPixel.txx,v $
Language: C++
Date: $Date: 2003-09-10 14:29:24 $
Version: $Revision: 1.10 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef _itkRGBAPixel_txx
#define _itkRGBAPixel_txx
#include "itkRGBAPixel.h"
#include "itkNumericTraits.h"
namespace itk
{
/*
* Assignment Operator
*/
template<class T>
RGBAPixel<T>&
RGBAPixel<T>
::operator= (const Self& r)
{
BaseArray::operator=(r);
return *this;
}
/*
* Assigment from a plain array
*/
template<class T>
RGBAPixel<T>&
RGBAPixel<T>
::operator= (const ComponentType r[4])
{
BaseArray::operator=(r);
return *this;
}
/*
* Compute luminance
*/
template<class T>
typename RGBAPixel<T>::ComponentType
RGBAPixel<T>
::GetLuminance() const
{
const double luminance =
0.30 * this->GetRed() +
0.59 * this->GetGreen() +
0.11 * this->GetBlue();
return static_cast<ComponentType>( luminance );
}
/**
* Print content to an ostream
*/
template<class TComponent>
std::ostream &
operator<<(std::ostream& os,const RGBAPixel<TComponent> & c )
{
os << c[0] << " ";
os << c[1] << " ";
os << c[2] << " ";
os << c[3] ;
return os;
}
/**
* Read content from an istream
*/
template<class TComponent>
std::istream &
operator>>(std::istream& is, RGBAPixel<TComponent> & c )
{
TComponent red;
TComponent green;
TComponent blue;
TComponent alpha;
is >> red >> green >> blue;
c.SetRed( red );
c.SetGreen( green );
c.SetBlue( blue );
c.SetAlpha( alpha );
return is;
}
} // end namespace itk
#endif
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