unorm_a2bgr10_pack.hpp

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// Copyright Take Vos 2020-2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "../SIMD/SIMD.hpp"
#include "../macros.hpp"
#include <algorithm>
#include <bit>
#include <cstdint>
 
hi_export_module(hikogui.image.unorm_a2bgr10_pack);
 
hi_export namespace hi::inline v1 {
 
//[[nodiscard]] constexpr uint32_t make_unorm_a2bgr10_pack_value(f32x4 const &rhs) noexcept
//{
//    auto const r = static_cast<uint32_t>(std::clamp(rhs.r, 0.0f, 1.0f) * 1023.0f);
//    auto const g = static_cast<uint32_t>(std::clamp(rhs.g, 0.0f, 1.0f) * 1023.0f);
//    auto const b = static_cast<uint32_t>(std::clamp(rhs.b, 0.0f, 1.0f) * 1023.0f);
//    auto const a = static_cast<uint32_t>(std::clamp(rhs.a, 0.0f, 1.0f) * 3.0f);
//    return (a << 30) | (b << 20) | (g << 10) | r;
//}
 
struct unorm_a2bgr10_pack {
    uint32_t value;
 
    unorm_a2bgr10_pack() = default;
    unorm_a2bgr10_pack(unorm_a2bgr10_pack const &rhs) noexcept = default;
    unorm_a2bgr10_pack(unorm_a2bgr10_pack &&rhs) noexcept = default;
    unorm_a2bgr10_pack &operator=(unorm_a2bgr10_pack const &rhs) noexcept = default;
    unorm_a2bgr10_pack &operator=(unorm_a2bgr10_pack &&rhs) noexcept = default;
    ~unorm_a2bgr10_pack() = default;
 
    //explicit unorm_a2bgr10_pack(f32x4 const &rhs) noexcept : value(make_unorm_a2bgr10_pack_value(rhs)) {}
 
    //unorm_a2bgr10_pack &operator=(f32x4 const &rhs) noexcept
    //{
    //    value = make_unorm_a2bgr10_pack_value(rhs);
    //    return *this;
    //}
 
    explicit operator f32x4() const noexcept
    {
        return f32x4{
            static_cast<float>((value >> 20) & 0x3ff) / 1023.0f,
            static_cast<float>((value >> 10) & 0x3ff) / 1023.0f,
            static_cast<float>(value & 0x3ff) / 1023.0f,
            static_cast<float>(value >> 30) / 3.0f};
    }
};
 
} // namespace hi::inline v1