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

#ifndef COLOR_H

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


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

        uint32_t u32;
    };
};

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

    static inline ColorU32 ConvertToU32(ColorF32 c)
    {
        ColorU32 result;

        result.b = (uint8_t)(c.b * 255);
        result.g = (uint8_t)(c.g * 255);
        result.r = (uint8_t)(c.r * 255);
        result.a = (uint8_t)(c.a * 255);

        return result;
    }
};


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

    result.b = MIN((c1.b + c2.b), 1.0f);
    result.g = MIN((c1.g + c2.g), 1.0f);
    result.r = MIN((c1.r + c2.r), 1.0f);
    result.a = MIN((c1.a + c2.a), 1.0f);

    return result;
}

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

    return(c1);
}

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

    result.b = MIN((f * c.b), 1.0f);
    result.g = MIN((f * c.g), 1.0f);
    result.r = MIN((f * c.r), 1.0f);
    result.a = MIN((f * c.a), 1.0f);

    return result;
}

#define COLOR_H
#endif