180 lines
3.9 KiB
C++
180 lines
3.9 KiB
C++
/*
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* This program source code file is part of KICAD, a free EDA CAD application.
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*
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* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
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* Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
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*
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* Color class
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <gal/color4d.h>
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using namespace KIGFX;
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COLOR4D::COLOR4D( EDA_COLOR_T aColor )
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{
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r = g_ColorRefs[aColor].m_Red / 255.0;
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g = g_ColorRefs[aColor].m_Green / 255.0;
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b = g_ColorRefs[aColor].m_Blue / 255.0;
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a = 1.0;
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}
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#ifdef WX_COMPATIBILITY
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COLOR4D::COLOR4D( const wxColour& aColor )
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{
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r = aColor.Red();
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g = aColor.Green();
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b = aColor.Blue();
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a = aColor.Alpha();
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}
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#endif
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const bool COLOR4D::operator==( const COLOR4D& aColor )
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{
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return a == aColor.a && r == aColor.r && g == aColor.g && b == aColor.b;
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}
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const bool COLOR4D::operator!=( const COLOR4D& aColor )
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{
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return a != aColor.a || r != aColor.r || g != aColor.g || b != aColor.b;
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}
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void COLOR4D::ToHSV( double& aOutH, double& aOutS, double& aOutV ) const
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{
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double min, max, delta;
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min = r < g ? r : g;
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min = min < b ? min : b;
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max = r > g ? r : g;
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max = max > b ? max : b;
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aOutV = max; // v
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delta = max - min;
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if( max > 0.0 )
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{
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aOutS = ( delta / max ); // s
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}
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else
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{
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// r = g = b = 0 // s = 0, v is undefined
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aOutS = 0.0;
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aOutH = NAN; // its now undefined
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return;
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}
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if( r >= max ) // > is bogus, just keeps compiler happy
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aOutH = ( g - b ) / delta; // between yellow & magenta
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else if( g >= max )
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aOutH = 2.0 + ( b - r ) / delta; // between cyan & yellow
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else
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aOutH = 4.0 + ( r - g ) / delta; // between magenta & cyan
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aOutH *= 60.0; // degrees
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if( aOutH < 0.0 )
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aOutH += 360.0;
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}
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void COLOR4D::FromHSV( double aInH, double aInS, double aInV )
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{
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double hh, p, q, t, ff;
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long i;
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if( aInS <= 0.0 ) // < is bogus, just shuts up warnings
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{
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r = aInV;
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g = aInV;
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b = aInV;
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return;
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}
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hh = aInH;
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if( hh >= 360.0 )
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hh = 0.0;
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hh /= 60.0;
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i = (long) hh;
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ff = hh - i;
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p = aInV * ( 1.0 - aInS );
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q = aInV * ( 1.0 - ( aInS * ff ) );
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t = aInV * ( 1.0 - ( aInS * ( 1.0 - ff ) ) );
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switch( i )
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{
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case 0:
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r = aInV;
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g = t;
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b = p;
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break;
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case 1:
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r = q;
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g = aInV;
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b = p;
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break;
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case 2:
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r = p;
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g = aInV;
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b = t;
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break;
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case 3:
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r = p;
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g = q;
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b = aInV;
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break;
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case 4:
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r = t;
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g = p;
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b = aInV;
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break;
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case 5:
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default:
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r = aInV;
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g = p;
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b = q;
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break;
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}
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}
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COLOR4D& COLOR4D::Saturate( double aFactor )
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{
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double h, s, v;
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ToHSV( h, s, v );
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FromHSV( h, aFactor, 1.0 );
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return *this;
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}
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