Source/core/svg/ColorDistance.h

/*
 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef ColorDistance_h
#define ColorDistance_h

namespace WebCore {

class Color;

class ColorDistance {
public:
    ColorDistance();
    ColorDistance(const Color& fromColor, const Color& toColor);
    ColorDistance(int redDiff, int blueDiff, int greenDiff);

    ColorDistance scaledDistance(float scaleFactor) const;
    Color addToColor(const Color&) const;

    static Color addColors(const Color&, const Color&);
    static Color clampColor(int red, int green, int blue, int alpha);

    bool isZero() const;

    float distance() const;

private:
    int m_redDiff;
    int m_greenDiff;
    int m_blueDiff;
};
}

#endif // ColorDistance_h