Color.h

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//========================================================================
// Copyright (c) 2003-2011 Anael Seghezzi <www.maratis3d.com>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would
//    be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
//    be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
//    distribution.
//
//========================================================================


#ifndef __COLOR_H
#define __COLOR_H

namespace Neo
{
class NEO_CORE_EXPORT Color
{
public:

    unsigned char r;
    unsigned char g;
    unsigned char b;
    unsigned char a;

public:

    Color(void):    
        r(0), 
        g(0), 
        b(0),
        a(0)
    {}

    Color(unsigned char newR, unsigned char newG, unsigned char newB, unsigned char newA):  
        r(newR), 
        g(newG), 
        b(newB),
        a(newA)
    {}

    Color(const Color & color): 
        r(color.r), 
        g(color.g), 
        b(color.b),
        a(color.a)
    {}

    Color(const Vector3 & color):   
        r(CLAMP((int)(color.x*255), 0, 255)), 
        g(CLAMP((int)(color.y*255), 0, 255)), 
        b(CLAMP((int)(color.z*255), 0, 255)),
        a(255)
    {}

    Color(const Vector4 & color):   
        r(CLAMP((int)(color.x*255), 0, 255)), 
        g(CLAMP((int)(color.y*255), 0, 255)), 
        b(CLAMP((int)(color.z*255), 0, 255)),
        a(CLAMP((int)(color.w*255), 0, 255))
    {}

    ~Color() 
    {}

public:

    inline Color operator + (const Color & color) const
    {   
        int R = r + color.r; if(R > 255) R = 255;
        int G = g + color.g; if(G > 255) G = 255;
        int B = b + color.b; if(B > 255) B = 255;
        int A = a + color.a; if(A > 255) A = 255;

        return Color(R, G, B, A);
    }
    
    inline Color operator - (const Color & color) const
    {   
        int R = r - color.r; if(R < 0) R = 0;
        int G = g - color.g; if(G < 0) G = 0;
        int B = b - color.b; if(B < 0) B = 0;
        int A = a - color.a; if(A < 0) A = 0;

        return Color(R, G, B, A);
    }

    inline Color operator + (const int value) const
    {   
        int R = CLAMP((int)(r + value), 0, 255);
        int G = CLAMP((int)(g + value), 0, 255);
        int B = CLAMP((int)(b + value), 0, 255);
        int A = CLAMP((int)(a + value), 0, 255);

        return Color(R, G, B, A);
    }

    inline Color operator - (const int value) const
    {   
        int R = CLAMP((int)(r - value), 0, 255);
        int G = CLAMP((int)(g - value), 0, 255);
        int B = CLAMP((int)(b - value), 0, 255);
        int A = CLAMP((int)(a - value), 0, 255);

        return Color(R, G, B, A);
    }

    inline Color operator * (const float value) const
    {   
        int R = CLAMP((int)(r * value), 0, 255);
        int G = CLAMP((int)(g * value), 0, 255);
        int B = CLAMP((int)(b * value), 0, 255);
        int A = CLAMP((int)(a * value), 0, 255);

        return Color(R, G, B, A);
    }

    inline Color operator / (const float value) const
    {   
        int R = CLAMP((int)(r / value), 0, 255);
        int G = CLAMP((int)(g / value), 0, 255);
        int B = CLAMP((int)(b / value), 0, 255);
        int A = CLAMP((int)(a / value), 0, 255);

        return Color(R, G, B, A);
    }

    inline bool operator == (const Color & color) const
    {
        if(r == color.r && g == color.g && b == color.b && a == color.a)
            return true;

        return false;
    }

    inline bool operator != (const Color & color) const
    {   
        return !((*this) == color);
    }

    inline operator unsigned char * () const 
    {
        return (unsigned char *) this;
    }

    inline operator const unsigned char * () const 
    {
        return (const unsigned char *) this;
    }

public:

    inline void set(unsigned char newR, unsigned char newG, unsigned char newB, unsigned char newA)
    {   
        r = newR;   
        g = newG;   
        b = newB;
        a = newA;
    }
};
}
#endif