2018-soft-3d-renderer/include/color.h

#ifndef COLOR_H

#include "util.h"
#include <cstdint>


// STRUCTURES
struct ColorU32
{
    union
    {
        struct
        {
            uint8_t b, g, r, a;
        };

        uint32_t u32;
    };
};

struct ColorF32
{
    float b, g, r, a;
};


// OPERATORS
// c1 + c2
inline ColorF32 operator+(ColorF32 const &c1, ColorF32 const &c2)
{
    ColorF32 result;

    result.b = c1.b + c2.b;
    result.g = c1.g + c2.g;
    result.r = c1.r + c2.r;
    result.a = c1.a + c2.a;

    return result;
}

// c1 += c2
inline ColorF32 &operator+=(ColorF32 &c1, ColorF32 const &c2)
{
    c1 = c1 + c2;

    return c1;
}

// c * f
inline ColorF32 operator*(ColorF32 const &c, float f)
{
    ColorF32 result;

    result.b = f * c.b;
    result.g = f * c.g;
    result.r = f * c.r;
    result.a = f * c.a;

    return result;
}

// f * c
inline ColorF32 operator*(float f, ColorF32 const &c)
{
    ColorF32 result;

    result = c * f;

    return result;
}

// c1 * c2
inline ColorF32 operator*(ColorF32 const &c1, ColorF32 const &c2)
{
    ColorF32 result;

    result.b = c1.b * c2.b;
    result.g = c1.g * c2.g;
    result.r = c1.r * c2.r;
    result.a = c1.a * c2.a;

    return result;
}

// c / f
inline ColorF32 operator/(ColorF32 const &c, float f)
{
    ColorF32 result;

    float invF = 1.0f / f;

    result.b = c.b * invF;
    result.g = c.g * invF;
    result.r = c.r * invF;
    result.a = c.a * invF;

    return result;
}

// c /= f
inline ColorF32 &operator/=(ColorF32 &c, float f)
{
    c = c / f;

    return c;
}


// PUBLIC FUNCTIONS
void ScaleColor(ColorF32 &c);


#define COLOR_H
#endif