(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "three", "./Pass.js", "../shaders/CopyShader.js", "../shaders/LuminosityHighPassShader.js"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("three"), require("./Pass.js"), require("../shaders/CopyShader.js"), require("../shaders/LuminosityHighPassShader.js"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.three, global.Pass, global.CopyShader, global.LuminosityHighPassShader);
    global.UnrealBloomPass = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _three, _Pass2, _CopyShader, _LuminosityHighPassShader) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.UnrealBloomPass = void 0;

  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); }

  /**
   * UnrealBloomPass is inspired by the bloom pass of Unreal Engine. It creates a
   * mip map chain of bloom textures and blurs them with different radii. Because
   * of the weighted combination of mips, and because larger blurs are done on
   * higher mips, this effect provides good quality and performance.
   *
   * Reference:
   * - https://docs.unrealengine.com/latest/INT/Engine/Rendering/PostProcessEffects/Bloom/
   */
  var UnrealBloomPass = /*#__PURE__*/function (_Pass) {
    _inherits(UnrealBloomPass, _Pass);

    var _super = _createSuper(UnrealBloomPass);

    function UnrealBloomPass(resolution, strength, radius, threshold) {
      var _this;

      _classCallCheck(this, UnrealBloomPass);

      _this = _super.call(this);
      _this.strength = strength !== undefined ? strength : 1;
      _this.radius = radius;
      _this.threshold = threshold;
      _this.resolution = resolution !== undefined ? new _three.Vector2(resolution.x, resolution.y) : new _three.Vector2(256, 256); // create color only once here, reuse it later inside the render function

      _this.clearColor = new _three.Color(0, 0, 0); // render targets

      var pars = {
        minFilter: _three.LinearFilter,
        magFilter: _three.LinearFilter,
        format: _three.RGBAFormat
      };
      _this.renderTargetsHorizontal = [];
      _this.renderTargetsVertical = [];
      _this.nMips = 5;
      var resx = Math.round(_this.resolution.x / 2);
      var resy = Math.round(_this.resolution.y / 2);
      _this.renderTargetBright = new _three.WebGLRenderTarget(resx, resy, pars);
      _this.renderTargetBright.texture.name = 'UnrealBloomPass.bright';
      _this.renderTargetBright.texture.generateMipmaps = false;

      for (var i = 0; i < _this.nMips; i++) {
        var renderTargetHorizonal = new _three.WebGLRenderTarget(resx, resy, pars);
        renderTargetHorizonal.texture.name = 'UnrealBloomPass.h' + i;
        renderTargetHorizonal.texture.generateMipmaps = false;

        _this.renderTargetsHorizontal.push(renderTargetHorizonal);

        var renderTargetVertical = new _three.WebGLRenderTarget(resx, resy, pars);
        renderTargetVertical.texture.name = 'UnrealBloomPass.v' + i;
        renderTargetVertical.texture.generateMipmaps = false;

        _this.renderTargetsVertical.push(renderTargetVertical);

        resx = Math.round(resx / 2);
        resy = Math.round(resy / 2);
      } // luminosity high pass material


      if (_LuminosityHighPassShader.LuminosityHighPassShader === undefined) console.error('THREE.UnrealBloomPass relies on LuminosityHighPassShader');
      var highPassShader = _LuminosityHighPassShader.LuminosityHighPassShader;
      _this.highPassUniforms = _three.UniformsUtils.clone(highPassShader.uniforms);
      _this.highPassUniforms['luminosityThreshold'].value = threshold;
      _this.highPassUniforms['smoothWidth'].value = 0.01;
      _this.materialHighPassFilter = new _three.ShaderMaterial({
        uniforms: _this.highPassUniforms,
        vertexShader: highPassShader.vertexShader,
        fragmentShader: highPassShader.fragmentShader,
        defines: {}
      }); // Gaussian Blur Materials

      _this.separableBlurMaterials = [];
      var kernelSizeArray = [3, 5, 7, 9, 11];
      resx = Math.round(_this.resolution.x / 2);
      resy = Math.round(_this.resolution.y / 2);

      for (var _i = 0; _i < _this.nMips; _i++) {
        _this.separableBlurMaterials.push(_this.getSeperableBlurMaterial(kernelSizeArray[_i]));

        _this.separableBlurMaterials[_i].uniforms['texSize'].value = new _three.Vector2(resx, resy);
        resx = Math.round(resx / 2);
        resy = Math.round(resy / 2);
      } // Composite material


      _this.compositeMaterial = _this.getCompositeMaterial(_this.nMips);
      _this.compositeMaterial.uniforms['blurTexture1'].value = _this.renderTargetsVertical[0].texture;
      _this.compositeMaterial.uniforms['blurTexture2'].value = _this.renderTargetsVertical[1].texture;
      _this.compositeMaterial.uniforms['blurTexture3'].value = _this.renderTargetsVertical[2].texture;
      _this.compositeMaterial.uniforms['blurTexture4'].value = _this.renderTargetsVertical[3].texture;
      _this.compositeMaterial.uniforms['blurTexture5'].value = _this.renderTargetsVertical[4].texture;
      _this.compositeMaterial.uniforms['bloomStrength'].value = strength;
      _this.compositeMaterial.uniforms['bloomRadius'].value = 0.1;
      _this.compositeMaterial.needsUpdate = true;
      var bloomFactors = [1.0, 0.8, 0.6, 0.4, 0.2];
      _this.compositeMaterial.uniforms['bloomFactors'].value = bloomFactors;
      _this.bloomTintColors = [new _three.Vector3(1, 1, 1), new _three.Vector3(1, 1, 1), new _three.Vector3(1, 1, 1), new _three.Vector3(1, 1, 1), new _three.Vector3(1, 1, 1)];
      _this.compositeMaterial.uniforms['bloomTintColors'].value = _this.bloomTintColors; // copy material

      if (_CopyShader.CopyShader === undefined) {
        console.error('THREE.UnrealBloomPass relies on CopyShader');
      }

      var copyShader = _CopyShader.CopyShader;
      _this.copyUniforms = _three.UniformsUtils.clone(copyShader.uniforms);
      _this.copyUniforms['opacity'].value = 1.0;
      _this.materialCopy = new _three.ShaderMaterial({
        uniforms: _this.copyUniforms,
        vertexShader: copyShader.vertexShader,
        fragmentShader: copyShader.fragmentShader,
        blending: _three.AdditiveBlending,
        depthTest: false,
        depthWrite: false,
        transparent: true
      });
      _this.enabled = true;
      _this.needsSwap = false;
      _this._oldClearColor = new _three.Color();
      _this.oldClearAlpha = 1;
      _this.basic = new _three.MeshBasicMaterial();
      _this.fsQuad = new _Pass2.FullScreenQuad(null);
      return _this;
    }

    _createClass(UnrealBloomPass, [{
      key: "dispose",
      value: function dispose() {
        for (var i = 0; i < this.renderTargetsHorizontal.length; i++) {
          this.renderTargetsHorizontal[i].dispose();
        }

        for (var _i2 = 0; _i2 < this.renderTargetsVertical.length; _i2++) {
          this.renderTargetsVertical[_i2].dispose();
        }

        this.renderTargetBright.dispose();
      }
    }, {
      key: "setSize",
      value: function setSize(width, height) {
        var resx = Math.round(width / 2);
        var resy = Math.round(height / 2);
        this.renderTargetBright.setSize(resx, resy);

        for (var i = 0; i < this.nMips; i++) {
          this.renderTargetsHorizontal[i].setSize(resx, resy);
          this.renderTargetsVertical[i].setSize(resx, resy);
          this.separableBlurMaterials[i].uniforms['texSize'].value = new _three.Vector2(resx, resy);
          resx = Math.round(resx / 2);
          resy = Math.round(resy / 2);
        }
      }
    }, {
      key: "render",
      value: function render(renderer, writeBuffer, readBuffer, deltaTime, maskActive) {
        renderer.getClearColor(this._oldClearColor);
        this.oldClearAlpha = renderer.getClearAlpha();
        var oldAutoClear = renderer.autoClear;
        renderer.autoClear = false;
        renderer.setClearColor(this.clearColor, 0);
        if (maskActive) renderer.state.buffers.stencil.setTest(false); // Render input to screen

        if (this.renderToScreen) {
          this.fsQuad.material = this.basic;
          this.basic.map = readBuffer.texture;
          renderer.setRenderTarget(null);
          renderer.clear();
          this.fsQuad.render(renderer);
        } // 1. Extract Bright Areas


        this.highPassUniforms['tDiffuse'].value = readBuffer.texture;
        this.highPassUniforms['luminosityThreshold'].value = this.threshold;
        this.fsQuad.material = this.materialHighPassFilter;
        renderer.setRenderTarget(this.renderTargetBright);
        renderer.clear();
        this.fsQuad.render(renderer); // 2. Blur All the mips progressively

        var inputRenderTarget = this.renderTargetBright;

        for (var i = 0; i < this.nMips; i++) {
          this.fsQuad.material = this.separableBlurMaterials[i];
          this.separableBlurMaterials[i].uniforms['colorTexture'].value = inputRenderTarget.texture;
          this.separableBlurMaterials[i].uniforms['direction'].value = UnrealBloomPass.BlurDirectionX;
          renderer.setRenderTarget(this.renderTargetsHorizontal[i]);
          renderer.clear();
          this.fsQuad.render(renderer);
          this.separableBlurMaterials[i].uniforms['colorTexture'].value = this.renderTargetsHorizontal[i].texture;
          this.separableBlurMaterials[i].uniforms['direction'].value = UnrealBloomPass.BlurDirectionY;
          renderer.setRenderTarget(this.renderTargetsVertical[i]);
          renderer.clear();
          this.fsQuad.render(renderer);
          inputRenderTarget = this.renderTargetsVertical[i];
        } // Composite All the mips


        this.fsQuad.material = this.compositeMaterial;
        this.compositeMaterial.uniforms['bloomStrength'].value = this.strength;
        this.compositeMaterial.uniforms['bloomRadius'].value = this.radius;
        this.compositeMaterial.uniforms['bloomTintColors'].value = this.bloomTintColors;
        renderer.setRenderTarget(this.renderTargetsHorizontal[0]);
        renderer.clear();
        this.fsQuad.render(renderer); // Blend it additively over the input texture

        this.fsQuad.material = this.materialCopy;
        this.copyUniforms['tDiffuse'].value = this.renderTargetsHorizontal[0].texture;
        if (maskActive) renderer.state.buffers.stencil.setTest(true);

        if (this.renderToScreen) {
          renderer.setRenderTarget(null);
          this.fsQuad.render(renderer);
        } else {
          renderer.setRenderTarget(readBuffer);
          this.fsQuad.render(renderer);
        } // Restore renderer settings


        renderer.setClearColor(this._oldClearColor, this.oldClearAlpha);
        renderer.autoClear = oldAutoClear;
      }
    }, {
      key: "getSeperableBlurMaterial",
      value: function getSeperableBlurMaterial(kernelRadius) {
        return new _three.ShaderMaterial({
          defines: {
            'KERNEL_RADIUS': kernelRadius,
            'SIGMA': kernelRadius
          },
          uniforms: {
            'colorTexture': {
              value: null
            },
            'texSize': {
              value: new _three.Vector2(0.5, 0.5)
            },
            'direction': {
              value: new _three.Vector2(0.5, 0.5)
            }
          },
          vertexShader: "varying vec2 vUv;\n\t\t\t\tvoid main() {\n\t\t\t\t\tvUv = uv;\n\t\t\t\t\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n\t\t\t\t}",
          fragmentShader: "#include <common>\n\t\t\t\tvarying vec2 vUv;\n\t\t\t\tuniform sampler2D colorTexture;\n\t\t\t\tuniform vec2 texSize;\n\t\t\t\tuniform vec2 direction;\n\n\t\t\t\tfloat gaussianPdf(in float x, in float sigma) {\n\t\t\t\t\treturn 0.39894 * exp( -0.5 * x * x/( sigma * sigma))/sigma;\n\t\t\t\t}\n\t\t\t\tvoid main() {\n\t\t\t\t\tvec2 invSize = 1.0 / texSize;\n\t\t\t\t\tfloat fSigma = float(SIGMA);\n\t\t\t\t\tfloat weightSum = gaussianPdf(0.0, fSigma);\n\t\t\t\t\tvec3 diffuseSum = texture2D( colorTexture, vUv).rgb * weightSum;\n\t\t\t\t\tfor( int i = 1; i < KERNEL_RADIUS; i ++ ) {\n\t\t\t\t\t\tfloat x = float(i);\n\t\t\t\t\t\tfloat w = gaussianPdf(x, fSigma);\n\t\t\t\t\t\tvec2 uvOffset = direction * invSize * x;\n\t\t\t\t\t\tvec3 sample1 = texture2D( colorTexture, vUv + uvOffset).rgb;\n\t\t\t\t\t\tvec3 sample2 = texture2D( colorTexture, vUv - uvOffset).rgb;\n\t\t\t\t\t\tdiffuseSum += (sample1 + sample2) * w;\n\t\t\t\t\t\tweightSum += 2.0 * w;\n\t\t\t\t\t}\n\t\t\t\t\tgl_FragColor = vec4(diffuseSum/weightSum, 1.0);\n\t\t\t\t}"
        });
      }
    }, {
      key: "getCompositeMaterial",
      value: function getCompositeMaterial(nMips) {
        return new _three.ShaderMaterial({
          defines: {
            'NUM_MIPS': nMips
          },
          uniforms: {
            'blurTexture1': {
              value: null
            },
            'blurTexture2': {
              value: null
            },
            'blurTexture3': {
              value: null
            },
            'blurTexture4': {
              value: null
            },
            'blurTexture5': {
              value: null
            },
            'dirtTexture': {
              value: null
            },
            'bloomStrength': {
              value: 1.0
            },
            'bloomFactors': {
              value: null
            },
            'bloomTintColors': {
              value: null
            },
            'bloomRadius': {
              value: 0.0
            }
          },
          vertexShader: "varying vec2 vUv;\n\t\t\t\tvoid main() {\n\t\t\t\t\tvUv = uv;\n\t\t\t\t\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n\t\t\t\t}",
          fragmentShader: "varying vec2 vUv;\n\t\t\t\tuniform sampler2D blurTexture1;\n\t\t\t\tuniform sampler2D blurTexture2;\n\t\t\t\tuniform sampler2D blurTexture3;\n\t\t\t\tuniform sampler2D blurTexture4;\n\t\t\t\tuniform sampler2D blurTexture5;\n\t\t\t\tuniform sampler2D dirtTexture;\n\t\t\t\tuniform float bloomStrength;\n\t\t\t\tuniform float bloomRadius;\n\t\t\t\tuniform float bloomFactors[NUM_MIPS];\n\t\t\t\tuniform vec3 bloomTintColors[NUM_MIPS];\n\n\t\t\t\tfloat lerpBloomFactor(const in float factor) {\n\t\t\t\t\tfloat mirrorFactor = 1.2 - factor;\n\t\t\t\t\treturn mix(factor, mirrorFactor, bloomRadius);\n\t\t\t\t}\n\n\t\t\t\tvoid main() {\n\t\t\t\t\tgl_FragColor = bloomStrength * ( lerpBloomFactor(bloomFactors[0]) * vec4(bloomTintColors[0], 1.0) * texture2D(blurTexture1, vUv) +\n\t\t\t\t\t\tlerpBloomFactor(bloomFactors[1]) * vec4(bloomTintColors[1], 1.0) * texture2D(blurTexture2, vUv) +\n\t\t\t\t\t\tlerpBloomFactor(bloomFactors[2]) * vec4(bloomTintColors[2], 1.0) * texture2D(blurTexture3, vUv) +\n\t\t\t\t\t\tlerpBloomFactor(bloomFactors[3]) * vec4(bloomTintColors[3], 1.0) * texture2D(blurTexture4, vUv) +\n\t\t\t\t\t\tlerpBloomFactor(bloomFactors[4]) * vec4(bloomTintColors[4], 1.0) * texture2D(blurTexture5, vUv) );\n\t\t\t\t}"
        });
      }
    }]);

    return UnrealBloomPass;
  }(_Pass2.Pass);

  _exports.UnrealBloomPass = UnrealBloomPass;
  UnrealBloomPass.BlurDirectionX = new _three.Vector2(1.0, 0.0);
  UnrealBloomPass.BlurDirectionY = new _three.Vector2(0.0, 1.0);
});