paradiso-win/src/lib/include/paradiso/rgba.hpp

#ifndef PARADISO_RGBA_HPP
#define PARADISO_RGBA_HPP

#include "globals.hpp"

namespace paradiso {
struct RGBA final {
    using value_type = std::uint32_t;
    value_type pixel{0x0};

    static constexpr RGBA from_rgb(uint8_t red, uint8_t green,
                                   uint8_t blue) noexcept {
        return from_rgba(red, green, blue, 0xFF);
    }

    static constexpr RGBA from_rgba(uint8_t red, uint8_t green, uint8_t blue,
                                    uint8_t alpha) noexcept {
        return {.pixel =
                    (value_type)(((((red << 8) | green) << 8) | blue) << 8) |
                    alpha};
    }

    constexpr void to_float(float rgba_f[4]) const noexcept {
        rgba_f[0] = static_cast<float>(this->red()) / 0xFF;
        rgba_f[1] = static_cast<float>(this->green()) / 0xFF;
        rgba_f[2] = static_cast<float>(this->blue()) / 0xFF;
        rgba_f[3] = static_cast<float>(this->alpha()) / 0xFF;
    }

    constexpr uint8_t red() const noexcept {
        return (pixel & 0xFF000000) >> 24;
    }
    constexpr uint8_t green() const noexcept {
        return uint8_t((pixel & 0xFF0000) >> 16);
    }
    constexpr uint8_t blue() const noexcept {
        return uint8_t((pixel & 0xFF00) >> 8);
    }
    constexpr uint8_t alpha() const noexcept { return uint8_t(pixel & 0xFF); }

    constexpr RGBA& set_red(uint8_t v) noexcept {
        pixel = (pixel & 0x00FFFFFF) | (v << 24);
        return *this;
    }

    constexpr RGBA& set_green(uint8_t v) noexcept {
        pixel = (pixel & 0xFF00FFFF) | (v << 16);
        return *this;
    }

    constexpr RGBA& set_blue(uint8_t v) noexcept {
        pixel = (pixel & 0xFFFF00FF) | (v << 8);
        return *this;
    }

    constexpr RGBA& set_alpha(uint8_t v) noexcept {
        pixel = (pixel & 0xFFFFFF00) | v;
        return *this;
    }
};
} // namespace paradiso

#endif