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Added class COLOR4D that contains color representation with 4 components (RGBA) (for future usage in GAL)

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Maciej Suminski 2013-03-28 17:42:15 +01:00
parent 7e0a44e4af
commit ad4bf38e7a
2 changed files with 170 additions and 0 deletions
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common/gal/color4d.cpp Normal file
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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;
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;
}

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include/gal/color4d.h Normal file
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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
*/
#ifndef COLOR4D_H_
#define COLOR4D_H_
namespace KiGfx
{
/**
* Class COLOR4D
* is the color representation with 4 components: red, green, blue, alpha.
*/
class COLOR4D
{
public:
// Constructor (creates the Color 0,0,0,0)
COLOR4D() :
r( 0 ), g( 0 ), b( 0 ), a( 1 )
{
}
/**
* @brief Constructor
*
* @param aRed is the red component [0.0 .. 1.0].
* @param aGreen is the green component [0.0 .. 1.0].
* @param aBlue is the blue component [0.0 .. 1.0].
* @param aAlpha is the alpha value [0.0 .. 1.0].
*/
COLOR4D( double aRed, double aGreen, double aBlue, double aAlpha ) :
r( aRed ), g( aGreen ), b( aBlue ), a( aAlpha )
{
}
/**
* Function Highlight
* Makes the color brighter by a given factor.
* @param aFactor Specifies how bright the color should become (valid values: 0.0 .. 1.0).
* @return COLOR4D& Brightened color.
*/
COLOR4D& Highlight( double aFactor )
{
r = (double) r * (1.0 - aFactor) + aFactor;
g = (double) g * (1.0 - aFactor) + aFactor;
b = (double) b * (1.0 - aFactor) + aFactor;
return *this;
}
/**
* Function Darken
* Makes the color darker by a given factor.
* @param aFactor Specifies how dark the color should become (valid values: 0.0 .. 1.0).
* @return COLOR4D& Darkened color.
*/
COLOR4D& Darken( double aFactor )
{
r = (double) r * (1.0 - aFactor);
g = (double) g * (1.0 - aFactor);
b = (double) b * (1.0 - aFactor);
return *this;
}
/**
* Function Highlighted
* Returns a color that is brighter by a given factor, without modifying object.
* @param aFactor Specifies how bright the color should become (valid values: 0.0 .. 1.0).
* @return COLOR4D Highlightedd color.
*/
COLOR4D Highlighted( double aFactor ) const
{
return COLOR4D( r * (1.0 - aFactor) + aFactor,
g * (1.0 - aFactor) + aFactor,
b * (1.0 - aFactor) + aFactor,
a );
}
/**
* Function Darkened
* Returns a color that is darker by a given factor, without modifying object.
* @param aFactor Specifies how dark the color should become (valid values: 0.0 .. 1.0).
* @return COLOR4D Darkened color.
*/
COLOR4D Darkened( double aFactor ) const
{
return COLOR4D( r * (1.0 - aFactor),
g * (1.0 - aFactor),
b * (1.0 - aFactor),
a );
}
/// @brief Equality operator, are two colors equal
const bool operator==( const COLOR4D& aColor );
/// @brief Not equality operator, are two colors not equal
const bool operator!=( const COLOR4D& aColor );
// Color components: red, green, blue, alpha
double r; ///< Red component
double g; ///< Green component
double b; ///< Blue component
double a; ///< Alpha component
};
} // namespace KiGfx
#endif /* COLOR4D_H_ */