color.h

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/*
 *  The ManaPlus Client
 *  Copyright (C) 2011-2019  The ManaPlus Developers
 *  Copyright (C) 2019-2021  Andrei Karas
 *
 *  This file is part of The ManaPlus Client.
 *
 *  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
 *  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, see <http://www.gnu.org/licenses/>.
 */
 
/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
 *
 *
 * Per Larsson a.k.a finalman
 * Olof Naessén a.k.a jansem/yakslem
 *
 * Visit: http://guichan.sourceforge.net
 *
 * License: (BSD)
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of Guichan nor the names of its contributors may
 *    be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef GUI_COLOR_H
#define GUI_COLOR_H
 
#include "utils/cast.h"
 
#include "localconsts.h"
 
class Color final
{
    public:
        constexpr Color() :
            r(0U),
            g(0U),
            b(0U),
            a(255U)
        {
        }
 
        explicit constexpr Color(const unsigned int color) :
            r((color >> 16) & 0xFFU),
            g((color >>  8) & 0xFFU),
            b(color         & 0xFFU),
            a(255U)
        {
        }
 
        constexpr Color(const unsigned int ar,
                        const unsigned int ag,
                        const unsigned int ab,
                        const unsigned int aa) :
            r(ar),
            g(ag),
            b(ab),
            a(aa)
        {
        }
 
 
        A_DEFAULT_COPY(Color)
 
        
        constexpr2 Color operator+(const Color& color) const
        {
            Color result(r + color.r,
                         g + color.g,
                         b + color.b,
                         255U);
 
            result.r = (result.r > 255U ? 255U : result.r);
            result.g = (result.g > 255U ? 255U : result.g);
            result.b = (result.b > 255U ? 255U : result.b);
 
            return result;
        }
 
        constexpr2 Color operator-(const Color& color) const
        {
            Color result(r - color.r,
                         g - color.g,
                         b - color.b,
                         255U);
 
            result.r = (result.r > 255U ? 255U : result.r);
            result.g = (result.g > 255U ? 255U : result.g);
            result.b = (result.b > 255U ? 255U : result.b);
 
            return result;
        }
 
        constexpr2 Color operator*(const float value) const
        {
            Color result(CAST_U32(static_cast<float>(r) * value),
                         CAST_U32(static_cast<float>(g) * value),
                         CAST_U32(static_cast<float>(b) * value),
                         a);
 
            result.r = (result.r > 255U ? 255U : result.r);
            result.g = (result.g > 255U ? 255U : result.g);
            result.b = (result.b > 255U ? 255U : result.b);
 
            return result;
        }
 
        constexpr bool operator==(const Color& color) const
        {
            return r == color.r &&
                g == color.g &&
                b == color.b &&
                a == color.a;
        }
 
        constexpr bool operator!=(const Color& color) const
        {
            return !(r == color.r &&
                g == color.g &&
                b == color.b &&
                a == color.a);
        }
 
        unsigned int r;
 
        unsigned int g;
 
        unsigned int b;
 
        unsigned int a;
};
 
#endif  // GUI_COLOR_H