color.hpp

#ifndef LIBSBX_MATH_COLOR_HPP_
#define LIBSBX_MATH_COLOR_HPP_
 
#include <cmath>
 
#include <yaml-cpp/yaml.h>
 
#include <libsbx/utility/hash.hpp>
 
// #include <libsbx/math/vector4.hpp>
 
namespace sbx::math {
 
class color {
 
public:
 
  color(std::uint32_t rgba) noexcept;
 
  color(std::float_t red, std::float_t green, std::float_t blue, std::float_t alpha = 1.0f) noexcept;
 
  static auto black() noexcept -> color {
    return color{0.0f, 0.0f, 0.0f, 1.0f};
  }
 
  static auto white() noexcept -> color {
    return color{1.0f, 1.0f, 1.0f, 1.0f};
  }
 
  static auto red() noexcept -> color {
    return color{1.0f, 0.0f, 0.0f, 1.0f};
  }
 
  static auto green() noexcept -> color {
    return color{0.0f, 1.0f, 0.0f, 1.0f};
  }
 
  static auto blue() noexcept -> color {
    return color{0.0f, 0.0f, 1.0f, 1.0f};
  }
 
  static auto magenta() noexcept -> color {
    return color{1.0f, 0.0f, 1.0f, 1.0f};
  }
 
  static auto yellow() noexcept -> color {
    return color{1.0f, 1.0f, 0.0f, 1.0f};
  }
 
  static auto cyan() noexcept -> color {
    return color{0.0f, 1.0f, 1.0f, 1.0f};
  }
 
  auto r() const noexcept -> const std::float_t&;
 
  auto r() noexcept -> std::float_t&;
 
  auto g() const noexcept -> const std::float_t&;
 
  auto g() noexcept -> std::float_t&;
 
  auto b() const noexcept -> const std::float_t&;
 
  auto b() noexcept -> std::float_t&;
 
  auto a() const noexcept -> const std::float_t&;
 
  auto a() noexcept -> std::float_t&;
 
private:
 
  std::float_t _red;
  std::float_t _green;
  std::float_t _blue;
  std::float_t _alpha;
 
}; // class color
 
auto operator==(const color& lhs, const color& rhs) noexcept -> bool;
 
auto operator*(color lhs, const std::float_t value) -> color;
 
} // namespace sbx::math
 
template<>
struct YAML::convert<sbx::math::color> {
  static auto encode(const sbx::math::color& color) -> Node;
  static auto decode(const Node& node, sbx::math::color& color) -> bool;
}; // struct YAML::convert
 
template<>
struct std::hash<sbx::math::color> {
  auto operator()(const sbx::math::color& color) const noexcept -> std::size_t;
}; // struct std::hash
 
#endif // LIBSBX_MATH_COLOR_HPP_