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/*
* The ManaPlus Client
* Copyright (C) 2011-2016 The ManaPlus Developers
*
* 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
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* 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 "localconsts.h"
/**
* Represents a color with red, green, blue and alpha components.
*/
class Color final
{
public:
/**
* Constructor. Initializes the color to black.
*/
Color();
/**
* Constructor. Constructs a color from the bytes in an integer.
* Call it with a hexadecimal constant for HTML-style color
* representation.
* The alpha component is 255 by default.
*
* EXAMPLE: Color(0xff50a0) constructs a very nice pinkish color.
*
* NOTE: Because of this constructor, integers will be automatically
* casted to a color by your compiler.
*
* @param color The color to initialise the object with.
*/
explicit Color(const unsigned int color);
/**
* Constructor. The default alpha value is 255.
*
* @param r Red color component (range 0-255).
* @param g Green color component (range 0-255).
* @param b Blue color component (range 0-255).
* @param a Alpha, used for transparency. A value of 0 means
* totaly transparent, 255 is totaly opaque.
*/
Color(const unsigned int r,
const unsigned int g,
const unsigned int b,
const unsigned int a = 255);
/**
* Adds the RGB values of two colors together. The values will be
* clamped if they go out of range.
*
* WARNING: This function will reset the alpha value of the
* returned color to 255.
*
* @param color A color to add to this color.
* @return The added colors with an alpha value set to 255.
*/
Color operator+(const Color& color) const;
/**
* Subtracts the RGB values of one color from another.
* The values will be clamped if they go out of range.
*
* WARNING: This function will reset the alpha value of the
* returned color to 255.
*
* @param color A color to subtract from this color.
* @return The subtracted colors with an alpha value set to 255.
*/
Color operator-(const Color& color) const;
/**
* Multiplies the RGB values of a color with a float value.
* The values will be clamped if they go out of range.
*
* @param value The value to multiply the color with.
* @return The multiplied colors. The alpha value will, unlike
* the add and subtract operations, be multiplied as
* well.
*/
Color operator*(const float value) const;
/**
* Compares two colors.
*
* @return True if the two colors have the same RGBA components
* false otherwise.
*/
bool operator==(const Color& color) const;
/**
* Compares two colors.
*
* @return True if the two colors have different RGBA components,
* false otherwise.
*/
bool operator!=(const Color& color) const;
/**
* Holds the red color component (range 0-255).
*/
unsigned int r;
/**
* Holds the green color component (range 0-255).
*/
unsigned int g;
/**
* Holds the blue color component (range 0-255).
*/
unsigned int b;
/**
* Holds the alpha color component. A value of 0 means totally
* transparent while a value of 255 is considered opaque.
*/
unsigned int a;
};
#endif // GUI_COLOR_H
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