/* Copyright 2004, 2005 Nicholas Bishop
 * 
 * This file is part of SharpConstruct.
 *
 * SharpConstruct is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * SharpConstruct 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with SharpConstruct; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include "Color.h"

using namespace SharpConstruct;

Color::Color()
: Red( 1 ), Green( 1 ), Blue( 1 )
{}

Color::Color( float r, float g, float b )
: Red( r ), Green( g ), Blue( b )
{}
	
Color::~Color()
{}
	
bool Color::IsGrey() const
{
	return Red == Green && Green == Blue;
}

void Color::SetToBlack()
{
	Red = 0;
	Green = 0;
	Blue = 0;
}

Color Color::operator+( const Color& c ) const
{
	return Color( Red + c.Red, Green + c.Green, Blue + c.Blue );
}
Color Color::operator+( const float c ) const
{
	return Color( Red + c, Green + c, Blue + c );
}
Color Color::operator-( const Color& c ) const
{
	return Color( Red - c.Red, Green - c.Green, Blue - c.Blue );
}
Color Color::operator-( const float c ) const
{
	return Color( Red - c, Green - c, Blue - c );
}
Color Color::operator*( const float c ) const
{
	return Color( Red * c, Green * c, Blue * c );
}

void Color::operator+=( const Color& c )
{
	Red += c.Red;
	Green += c.Green;
	Blue += c.Blue;	
}
void Color::operator/=( const int d )
{
	Red /= d;
	Green /= d;
	Blue /= d;	
}

Color SharpConstruct::MixColors( const Color& c1, const Color& c2 )
{
	Color r;
	r.Red = ( c1.Red + c2.Red ) / 2;
	r.Green = ( c1.Green + c2.Green ) / 2;
	r.Blue = ( c1.Blue + c2.Blue ) / 2;
	return r;
}
Color SharpConstruct::MixColors( const Color& c1, const Color& c2,
                                 const Color& c3 )
{
	Color r;
	r.Red = ( c1.Red + c2.Red + c3.Red ) / 3;
	r.Green = ( c1.Green + c2.Green + c3.Green ) / 3;
	r.Blue = ( c1.Blue + c2.Blue + c3.Blue ) / 3;
	return r;
}
Color SharpConstruct::MixColors( const Color& c1, const Color& c2,
                                 const Color& c3, const Color& c4 )
{
	Color r;
	r.Red = ( c1.Red + c2.Red + c3.Red + c4.Red ) / 4;
	r.Green = ( c1.Green + c2.Green + c3.Green + c4.Green ) / 4;
	r.Blue = ( c1.Blue + c2.Blue + c3.Blue + c4.Blue ) / 4;
	return r;
}