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/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
* Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
*
* Color class
*
* This program 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.
*
* This program 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 this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <gal/color4d.h>
using namespace KIGFX;
COLOR4D::COLOR4D( EDA_COLOR_T aColor )
{
r = g_ColorRefs[aColor].m_Red / 255.0;
g = g_ColorRefs[aColor].m_Green / 255.0;
b = g_ColorRefs[aColor].m_Blue / 255.0;
a = 1.0;
}
#ifdef WX_COMPATIBILITY
COLOR4D::COLOR4D( const wxColour& aColor )
{
r = aColor.Red();
g = aColor.Green();
b = aColor.Blue();
a = aColor.Alpha();
}
#endif
const bool COLOR4D::operator==( const COLOR4D& aColor )
{
return a == aColor.a && r == aColor.r && g == aColor.g && b == aColor.b;
}
const bool COLOR4D::operator!=( const COLOR4D& aColor )
{
return a != aColor.a || r != aColor.r || g != aColor.g || b != aColor.b;
}
void COLOR4D::ToHSV( double& aOutH, double& aOutS, double& aOutV ) const
{
double min, max, delta;
min = r < g ? r : g;
min = min < b ? min : b;
max = r > g ? r : g;
max = max > b ? max : b;
aOutV = max; // v
delta = max - min;
if( max > 0.0 )
{
aOutS = ( delta / max ); // s
}
else
{
// r = g = b = 0 // s = 0, v is undefined
aOutS = 0.0;
aOutH = NAN; // its now undefined
return;
}
if( r >= max ) // > is bogus, just keeps compiler happy
aOutH = ( g - b ) / delta; // between yellow & magenta
else if( g >= max )
aOutH = 2.0 + ( b - r ) / delta; // between cyan & yellow
else
aOutH = 4.0 + ( r - g ) / delta; // between magenta & cyan
aOutH *= 60.0; // degrees
if( aOutH < 0.0 )
aOutH += 360.0;
}
void COLOR4D::FromHSV( double aInH, double aInS, double aInV )
{
double hh, p, q, t, ff;
long i;
if( aInS <= 0.0 ) // < is bogus, just shuts up warnings
{
r = aInV;
g = aInV;
b = aInV;
return;
}
hh = aInH;
if( hh >= 360.0 )
hh = 0.0;
hh /= 60.0;
i = (long) hh;
ff = hh - i;
p = aInV * ( 1.0 - aInS );
q = aInV * ( 1.0 - ( aInS * ff ) );
t = aInV * ( 1.0 - ( aInS * ( 1.0 - ff ) ) );
switch( i )
{
case 0:
r = aInV;
g = t;
b = p;
break;
case 1:
r = q;
g = aInV;
b = p;
break;
case 2:
r = p;
g = aInV;
b = t;
break;
case 3:
r = p;
g = q;
b = aInV;
break;
case 4:
r = t;
g = p;
b = aInV;
break;
case 5:
default:
r = aInV;
g = p;
b = q;
break;
}
}
COLOR4D& COLOR4D::Saturate( double aFactor )
{
double h, s, v;
ToHSV( h, s, v );
FromHSV( h, aFactor, 1.0 );
return *this;
}
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