ami-cjs.js/lib/core/core.colors.js

<p align="center"> <img src="https://cloud.githubusercontent.com/assets/214063/23213764/78ade038-f90c-11e6-8208-4fcade5f3832.png" width="60%"> </p>

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var Colors = function () {
  function Colors() {
    _classCallCheck(this, Colors);
  }

  _createClass(Colors, null, [{
    key: "cielab2XYZ",


    // http://www.easyrgb.com/index.php?X=MATH&H=08#text8
    value: function cielab2XYZ(l, a, b) {
      var refX = 95.047;
      var refY = 100.00;
      var refZ = 108.883;

      var y = (l + 16) / 116;
      var x = a / 500 + y;
      var z = y - b / 200;

      if (Math.pow(y, 3) > 0.008856) {
        y = Math.pow(y, 3);
      } else {
        y = (y - 16 / 116) / 7.787;
      }

      if (Math.pow(x, 3) > 0.008856) {
        x = Math.pow(x, 3);
      } else {
        x = (x - 16 / 116) / 7.787;
      }

      if (Math.pow(z, 3) > 0.008856) {
        z = Math.pow(z, 3);
      } else {
        z = (z - 16 / 116) / 7.787;
      }

      return [refX * x, refY * y, refZ * z];
    }
  }, {
    key: "xyz2RGB",
    value: function xyz2RGB(x, y, z) {
      x /= 100;
      y /= 100;
      z /= 100;
      var r = x * 3.2406 + y * -1.5372 + z * -0.4986;
      var g = x * -0.9689 + y * 1.8758 + z * 0.0415;
      var b = x * 0.0557 + y * -0.2040 + z * 1.0570;

      if (r > 0.0031308) {
        r = 1.055 * Math.pow(r, 1 / 2.4) - 0.055;
      } else {
        r = 12.92 * r;
      }

      if (g > 0.0031308) {
        g = 1.055 * Math.pow(g, 1 / 2.4) - 0.055;
      } else {
        g = 12.92 * g;
      }

      if (b > 0.0031308) {
        b = 1.055 * Math.pow(b, 1 / 2.4) - 0.055;
      } else {
        b = 12.92 * b;
      }

      r = r * 255;
      g = g * 255;
      b = b * 255;

      return [r, g, b];
    }
  }, {
    key: "cielab2RGB",
    value: function cielab2RGB() {
      var l = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 50;
      var a = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
      var b = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;

      if (!(l >= 0 && l <= 100)) {
        return null;
      }

      var xyz = this.cielab2XYZ(l, a, b);
      return this.xyz2RGB.apply(this, _toConsumableArray(xyz));
    }
  }]);

  return Colors;
}();

exports.default = Colors;
module.exports = exports["default"];