spk_color.hpp

#pragma once
 
#include <iostream>
#include <vector>
 
namespace spk
{
    struct Color
    {
        float r;
        float g;
        float b;
        float a;

        Color();
        Color(int p_value);
        Color(int p_r, int p_g, int p_b, int p_a = 255);
        Color(float p_r, float p_g, float p_b, float p_a = 1.0f);

        Color operator+(const Color &p_other) const;
        Color operator-(const Color &p_other) const;
        bool operator==(const Color &p_other) const;
        bool operator!=(const Color &p_other) const;

        uint32_t toInt() const;

        friend std::ostream &operator<<(std::ostream &p_os, const spk::Color &p_other);
        friend std::wostream &operator<<(std::wostream &p_os, const spk::Color &p_other);

        static const Color red;
        static const Color blue;
        static const Color green;
        static const Color yellow;
        static const Color purple;
        static const Color cyan;
        static const Color orange;
        static const Color magenta;
        static const Color pink;
        static const Color black;
        static const Color white;
        static const Color grey;
    };
}
 
namespace std
{
    template <>
    struct hash<spk::Color>
    {
        size_t operator()(const spk::Color &p_color) const
        {
            size_t h1 = std::hash<float>{}(p_color.r);
            size_t h2 = std::hash<float>{}(p_color.g);
            size_t h3 = std::hash<float>{}(p_color.b);
            size_t h4 = std::hash<float>{}(p_color.a);
            size_t seed = h1;
            seed ^= h2 + 0x9e3779b9 + (seed << 6) + (seed >> 2);
            seed ^= h3 + 0x9e3779b9 + (seed << 6) + (seed >> 2);
            seed ^= h4 + 0x9e3779b9 + (seed << 6) + (seed >> 2);
            return (seed);
        }
    };
}