Colors.hpp

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#ifndef COLORS_H_
#define COLORS_H_

#include <array>
#include <string>
#include <vector>

#include "util/Vector.hpp"

namespace trase {

class RGBA {

  int m_r;

  int m_g;

  int m_b;

  int m_a;

public:
  const static int default_alpha;
  const static std::array<const RGBA, 10> defaults;
  const static RGBA black;
  const static RGBA white;

  RGBA() = default;

  RGBA(int r, int g, int b, int a = default_alpha) noexcept;

  explicit RGBA(const Vector<float, 4> &v) noexcept;

  explicit RGBA(const Vector<float, 3> &v) noexcept;

  explicit operator Vector<float, 4>() const noexcept {
    return {static_cast<float>(m_r), static_cast<float>(m_g),
            static_cast<float>(m_b), static_cast<float>(m_a)};
  };

  std::string to_rgb_string() const noexcept;

  int r() const noexcept;

  int g() const noexcept;

  int b() const noexcept;

  int a() const noexcept;

  RGBA &r(int r) noexcept;

  RGBA &g(int g) noexcept;

  RGBA &b(int b) noexcept;

  RGBA &a(int a) noexcept;

  bool operator==(const RGBA &b) const noexcept;
  bool operator!=(const RGBA &b) const noexcept;
};

class Colormap {
  std::vector<Vector<float, 3>> m_colors;

public:
  explicit Colormap(std::vector<Vector<float, 3>> list) noexcept;

  RGBA to_color(float i) const;
};

struct Colormaps {
  static const Colormap viridis;
};

} // namespace trase

#endif // COLORS_H_