color.h

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#pragma once
 
#include <array>
 
namespace argos_lib {
  struct ArgosColor {
    int r;
    int g;
    int b;
 
    ArgosColor operator*(double scale) {
      return ArgosColor{static_cast<int>(r * scale), static_cast<int>(g * scale), static_cast<int>(b * scale)};
    }
  };
 
  // clang-format off
  constexpr std::array<uint8_t, 256> gamma8 = {
      0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
      0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   1,   1,   1,   1,
      1,   1,   1,   1,   1,   1,   1,   1,   1,   2,   2,   2,   2,   2,   2,   2,
      2,   3,   3,   3,   3,   3,   3,   3,   4,   4,   4,   4,   4,   5,   5,   5,
      5,   6,   6,   6,   6,   7,   7,   7,   7,   8,   8,   8,   9,   9,   9,   10,
      10,  10,  11,  11,  11,  12,  12,  13,  13,  13,  14,  14,  15,  15,  16,  16,
      17,  17,  18,  18,  19,  19,  20,  20,  21,  21,  22,  22,  23,  24,  24,  25,
      25,  26,  27,  27,  28,  29,  29,  30,  31,  32,  32,  33,  34,  35,  35,  36,
      37,  38,  39,  39,  40,  41,  42,  43,  44,  45,  46,  47,  48,  49,  50,  50,
      51,  52,  54,  55,  56,  57,  58,  59,  60,  61,  62,  63,  64,  66,  67,  68,
      69,  70,  72,  73,  74,  75,  77,  78,  79,  81,  82,  83,  85,  86,  87,  89,
      90,  92,  93,  95,  96,  98,  99,  101, 102, 104, 105, 107, 109, 110, 112, 114,
      115, 117, 119, 120, 122, 124, 126, 127, 129, 131, 133, 135, 137, 138, 140, 142,
      144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 167, 169, 171, 173, 175,
      177, 180, 182, 184, 186, 189, 191, 193, 196, 198, 200, 203, 205, 208, 210, 213,
      215, 218, 220, 223, 225, 228, 231, 233, 236, 239, 241, 244, 247, 249, 252, 255};
  // clang-format on
 
  namespace colors {
    constexpr static ArgosColor kOff = ArgosColor{0, 0, 0};
    constexpr static ArgosColor kWhite = ArgosColor{120, 120, 120};
    constexpr static ArgosColor kReallyRed = ArgosColor{255, 0, 0};
    constexpr static ArgosColor kReallyGreen = ArgosColor{0, 255, 0};
    constexpr static ArgosColor kReallyBlue = ArgosColor{0, 0, 255};
    constexpr static ArgosColor kCubePurple = ArgosColor{130, 0, 130};
    constexpr static ArgosColor kConeYellow = ArgosColor{222, 178, 18};
    constexpr static ArgosColor kHotPink = ArgosColor{255, 105, 180};
    constexpr static ArgosColor kCatYellow = ArgosColor{255, 163, 0};  // Pantone 137C
    constexpr static ArgosColor kPurple = ArgosColor{75, 0, 130};
  }  // namespace colors
 
  constexpr ArgosColor GammaCorrect(ArgosColor original) {
    return ArgosColor{gamma8[original.r], gamma8[original.g], gamma8[original.b]};
  }
  namespace gamma_corrected_colors {
    constexpr static ArgosColor kOff = GammaCorrect(argos_lib::colors::kOff);
    constexpr static ArgosColor kWhite = GammaCorrect(argos_lib::colors::kWhite);
    constexpr static ArgosColor kReallyRed = GammaCorrect(argos_lib::colors::kReallyRed);
    constexpr static ArgosColor kReallyGreen = GammaCorrect(argos_lib::colors::kReallyGreen);
    constexpr static ArgosColor kReallyBlue = GammaCorrect(argos_lib::colors::kReallyBlue);
    constexpr static ArgosColor kCubePurple = GammaCorrect(argos_lib::colors::kCubePurple);
    constexpr static ArgosColor kConeYellow = GammaCorrect(argos_lib::colors::kConeYellow);
    constexpr static ArgosColor kHotPink = GammaCorrect(argos_lib::colors::kHotPink);
    constexpr static ArgosColor kCatYellow = GammaCorrect(argos_lib::colors::kCatYellow);
    constexpr static ArgosColor kPurple = GammaCorrect(argos_lib::colors::kPurple);
  }  // namespace gamma_corrected_colors
 
}  // namespace argos_lib