forked from Hartmut/paradiso
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
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#ifndef PARADISO_RGBA_HPP
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#define PARADISO_RGBA_HPP
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#include "globals.hpp"
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namespace paradiso
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{
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struct RGBA final
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{
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using value_type = std::uint32_t;
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value_type pixel{0x0};
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static constexpr RGBA from_rgb(uint8_t red, uint8_t green, uint8_t blue) noexcept
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{
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return from_rgba(red, green, blue, 0xFF);
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}
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static constexpr RGBA from_rgba(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha) noexcept
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{
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return {
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.pixel = (value_type)(((((red << 8) | green) << 8) | blue) << 8) | alpha};
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}
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constexpr void to_float(float rgba_f[4]) const noexcept
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{
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rgba_f[0] = static_cast<float>(this->red()) / 0xFF;
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rgba_f[1] = static_cast<float>(this->green()) / 0xFF;
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rgba_f[2] = static_cast<float>(this->blue()) / 0xFF;
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rgba_f[3] = static_cast<float>(this->alpha()) / 0xFF;
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}
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constexpr uint8_t red() const noexcept { return (pixel & 0xFF000000) >> 24; }
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constexpr uint8_t green() const noexcept { return uint8_t((pixel & 0xFF0000) >> 16); }
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constexpr uint8_t blue() const noexcept { return uint8_t((pixel & 0xFF00) >> 8); }
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constexpr uint8_t alpha() const noexcept { return uint8_t(pixel & 0xFF); }
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constexpr RGBA &set_red(uint8_t v) noexcept
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{
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pixel = (pixel & 0x00FFFFFF) | (v << 24);
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return *this;
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}
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constexpr RGBA &set_green(uint8_t v) noexcept
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{
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pixel = (pixel & 0xFF00FFFF) | (v << 16);
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return *this;
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}
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constexpr RGBA &set_blue(uint8_t v) noexcept
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{
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pixel = (pixel & 0xFFFF00FF) | (v << 8);
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return *this;
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}
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constexpr RGBA &set_alpha(uint8_t v) noexcept
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{
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pixel = (pixel & 0xFFFFFF00) | v;
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return *this;
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}
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};
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}
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#endif
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