(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "../core/Node.js", "../ShaderNode.js", "three"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("../core/Node.js"), require("../ShaderNode.js"), require("three"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.Node, global.ShaderNode, global.three);
    global.ColorSpaceNode = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _Node, _ShaderNode, _three) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.sRGBToLinear = _exports.default = _exports.LinearToLinear = void 0;
  _Node = _interopRequireDefault(_Node);

  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

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

  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }

  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } Object.defineProperty(subClass, "prototype", { value: Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }), writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }

  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

  function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

  function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

  function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

  var LinearToLinear = new _ShaderNode.ShaderNode(function (inputs) {
    return inputs.value;
  });
  _exports.LinearToLinear = LinearToLinear;
  var sRGBToLinear = new _ShaderNode.ShaderNode(function (inputs) {
    var value = inputs.value;
    var rgb = value.rgb;
    var a = (0, _ShaderNode.pow)((0, _ShaderNode.add)((0, _ShaderNode.mul)(rgb, 0.9478672986), (0, _ShaderNode.vec3)(0.0521327014)), (0, _ShaderNode.vec3)(2.4));
    var b = (0, _ShaderNode.mul)(rgb, 0.0773993808);
    var factor = (0, _ShaderNode.vec3)((0, _ShaderNode.lessThanEqual)(rgb, (0, _ShaderNode.vec3)(0.04045)));
    var rgbResult = (0, _ShaderNode.mix)(a, b, factor);
    return (0, _ShaderNode.join)(rgbResult.r, rgbResult.g, rgbResult.b, value.a);
  });
  _exports.sRGBToLinear = sRGBToLinear;
  var EncodingLib = {
    LinearToLinear: LinearToLinear,
    sRGBToLinear: sRGBToLinear
  };

  function getEncodingComponents(encoding) {
    switch (encoding) {
      case _three.LinearEncoding:
        return ['Linear'];

      case _three.sRGBEncoding:
        return ['sRGB'];

      /*
      		case RGBEEncoding:
      			return [ 'RGBE' ];
      		case RGBM7Encoding:
      			return [ 'RGBM', new FloatNode( 7.0 ).setConst( true ) ];
      		case RGBM16Encoding:
      			return [ 'RGBM', new FloatNode( 16.0 ).setConst( true ) ];
      		case RGBDEncoding:
      			return [ 'RGBD', new FloatNode( 256.0 ).setConst( true ) ];
      		case GammaEncoding:
      			return [ 'Gamma', new CodeNode( 'float( GAMMA_FACTOR )' ) ];
      */
    }
  }

  var ColorSpaceNode = /*#__PURE__*/function (_TempNode) {
    _inherits(ColorSpaceNode, _TempNode);

    var _super = _createSuper(ColorSpaceNode);

    /*
    	static GAMMA_TO_LINEAR = 'GammaToLinear';
    	static LINEAR_TO_GAMMA = 'LinearToGamma';
    
    	static RGBE_TO_LINEAR = 'RGBEToLinear';
    	static LINEAR_TO_RGBE = 'LinearToRGBE';
    
    	static RGBM_TO_LINEAR = 'RGBMToLinear';
    	static LINEAR_TO_RGBM = 'LinearToRGBM';
    
    	static RGBD_TO_LINEAR = 'RGBDToLinear';
    	static LINEAR_TO_RGBD = 'LinearToRGBD';
    */
    function ColorSpaceNode(method, node) {
      var _this;

      _classCallCheck(this, ColorSpaceNode);

      _this = _super.call(this, 'vec4');
      _this.method = method;
      _this.node = node;
      _this.factor = null;
      return _this;
    }

    _createClass(ColorSpaceNode, [{
      key: "fromEncoding",
      value: function fromEncoding(encoding) {
        var components = getEncodingComponents(encoding);
        this.method = 'LinearTo' + components[0];
        this.factor = components[1];
        return this;
      }
    }, {
      key: "fromDecoding",
      value: function fromDecoding(encoding) {
        var components = getEncodingComponents(encoding);
        this.method = components[0] + 'ToLinear';
        this.factor = components[1];
        return this;
      }
    }, {
      key: "generate",
      value: function generate(builder) {
        var type = this.getNodeType(builder);
        var method = this.method;
        var node = this.node;

        if (method !== ColorSpaceNode.LINEAR_TO_LINEAR) {
          var encodingFunctionNode = EncodingLib[method];
          var factor = this.factor;
          return encodingFunctionNode({
            value: node,
            factor: factor
          }).build(builder, type);
        } else {
          return node.build(builder, type);
        }
      }
    }]);

    return ColorSpaceNode;
  }(_Node.default);

  _defineProperty(ColorSpaceNode, "LINEAR_TO_LINEAR", 'LinearToLinear');

  _defineProperty(ColorSpaceNode, "SRGB_TO_LINEAR", 'sRGBToLinear');

  _defineProperty(ColorSpaceNode, "LINEAR_TO_SRGB", 'LinearTosRGB');

  var _default = ColorSpaceNode;
  _exports.default = _default;
});