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Colour.hh

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/*

    libpdf++: a C++ Free library to generate PDF file
    Copyright (C) 2002 Nestal Wan

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#ifndef __COLOUR_HEADER_INCLUDED_HEADER_INCLUDED__
#define __COLOUR_HEADER_INCLUDED_HEADER_INCLUDED__

#include <iosfwd>

namespace pdf { namespace util {

class CColour
{
private :
    double m_red, m_green, m_blue ;

public :
    static const double max = 1.0f, min = 0.0f ;

public :
    CColour( ) ;
    CColour( double red, double green, double blue ) ;

    double R( ) const { return m_red ; }
    double G( ) const { return m_green ; }
    double B( ) const { return m_blue ; }
    
    void R( double red )   { m_red = red ; }
    void G( double green ) { m_green = green ; }
    void B( double blue )  { m_blue = blue ; }
    
    std::ostream& Print( std::ostream& os ) const ;

    bool operator==( const CColour& colour ) const ;
    bool operator!=( const CColour& colour ) const
        { return !operator==( colour ) ; }
} ;

inline std::ostream& operator<<( std::ostream& os, const CColour& colour )
{
    return colour.Print( os ) ;
}


const CColour Red( ) ;
const CColour Green( ) ;
const CColour Blue( ) ;
const CColour Purple( ) ;
const CColour Cyan( ) ;
const CColour Yellow( ) ;
const CColour Orange( ) ;

} } // end of namespace

#endif

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