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

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

  /**
   * SAO implementation inspired from bhouston previous SAO work
   */
  var SAOPass = /*#__PURE__*/function (_Pass) {
    _inherits(SAOPass, _Pass);

    var _super = _createSuper(SAOPass);

    function SAOPass(scene, camera) {
      var _this;

      var useDepthTexture = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
      var useNormals = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
      var resolution = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : new _three.Vector2(256, 256);

      _classCallCheck(this, SAOPass);

      _this = _super.call(this);
      _this.scene = scene;
      _this.camera = camera;
      _this.clear = true;
      _this.needsSwap = false;
      _this.supportsDepthTextureExtension = useDepthTexture;
      _this.supportsNormalTexture = useNormals;
      _this.originalClearColor = new _three.Color();
      _this._oldClearColor = new _three.Color();
      _this.oldClearAlpha = 1;
      _this.params = {
        output: 0,
        saoBias: 0.5,
        saoIntensity: 0.18,
        saoScale: 1,
        saoKernelRadius: 100,
        saoMinResolution: 0,
        saoBlur: true,
        saoBlurRadius: 8,
        saoBlurStdDev: 4,
        saoBlurDepthCutoff: 0.01
      };
      _this.resolution = new _three.Vector2(resolution.x, resolution.y);
      _this.saoRenderTarget = new _three.WebGLRenderTarget(_this.resolution.x, _this.resolution.y, {
        minFilter: _three.LinearFilter,
        magFilter: _three.LinearFilter,
        format: _three.RGBAFormat
      });
      _this.blurIntermediateRenderTarget = _this.saoRenderTarget.clone();
      _this.beautyRenderTarget = _this.saoRenderTarget.clone();
      _this.normalRenderTarget = new _three.WebGLRenderTarget(_this.resolution.x, _this.resolution.y, {
        minFilter: _three.NearestFilter,
        magFilter: _three.NearestFilter,
        format: _three.RGBAFormat
      });
      _this.depthRenderTarget = _this.normalRenderTarget.clone();
      var depthTexture;

      if (_this.supportsDepthTextureExtension) {
        depthTexture = new _three.DepthTexture();
        depthTexture.type = _three.UnsignedShortType;
        _this.beautyRenderTarget.depthTexture = depthTexture;
        _this.beautyRenderTarget.depthBuffer = true;
      }

      _this.depthMaterial = new _three.MeshDepthMaterial();
      _this.depthMaterial.depthPacking = _three.RGBADepthPacking;
      _this.depthMaterial.blending = _three.NoBlending;
      _this.normalMaterial = new _three.MeshNormalMaterial();
      _this.normalMaterial.blending = _three.NoBlending;

      if (_SAOShader.SAOShader === undefined) {
        console.error('THREE.SAOPass relies on SAOShader');
      }

      _this.saoMaterial = new _three.ShaderMaterial({
        defines: Object.assign({}, _SAOShader.SAOShader.defines),
        fragmentShader: _SAOShader.SAOShader.fragmentShader,
        vertexShader: _SAOShader.SAOShader.vertexShader,
        uniforms: _three.UniformsUtils.clone(_SAOShader.SAOShader.uniforms)
      });
      _this.saoMaterial.extensions.derivatives = true;
      _this.saoMaterial.defines['DEPTH_PACKING'] = _this.supportsDepthTextureExtension ? 0 : 1;
      _this.saoMaterial.defines['NORMAL_TEXTURE'] = _this.supportsNormalTexture ? 1 : 0;
      _this.saoMaterial.defines['PERSPECTIVE_CAMERA'] = _this.camera.isPerspectiveCamera ? 1 : 0;
      _this.saoMaterial.uniforms['tDepth'].value = _this.supportsDepthTextureExtension ? depthTexture : _this.depthRenderTarget.texture;
      _this.saoMaterial.uniforms['tNormal'].value = _this.normalRenderTarget.texture;

      _this.saoMaterial.uniforms['size'].value.set(_this.resolution.x, _this.resolution.y);

      _this.saoMaterial.uniforms['cameraInverseProjectionMatrix'].value.copy(_this.camera.projectionMatrixInverse);

      _this.saoMaterial.uniforms['cameraProjectionMatrix'].value = _this.camera.projectionMatrix;
      _this.saoMaterial.blending = _three.NoBlending;

      if (_DepthLimitedBlurShader.DepthLimitedBlurShader === undefined) {
        console.error('THREE.SAOPass relies on DepthLimitedBlurShader');
      }

      _this.vBlurMaterial = new _three.ShaderMaterial({
        uniforms: _three.UniformsUtils.clone(_DepthLimitedBlurShader.DepthLimitedBlurShader.uniforms),
        defines: Object.assign({}, _DepthLimitedBlurShader.DepthLimitedBlurShader.defines),
        vertexShader: _DepthLimitedBlurShader.DepthLimitedBlurShader.vertexShader,
        fragmentShader: _DepthLimitedBlurShader.DepthLimitedBlurShader.fragmentShader
      });
      _this.vBlurMaterial.defines['DEPTH_PACKING'] = _this.supportsDepthTextureExtension ? 0 : 1;
      _this.vBlurMaterial.defines['PERSPECTIVE_CAMERA'] = _this.camera.isPerspectiveCamera ? 1 : 0;
      _this.vBlurMaterial.uniforms['tDiffuse'].value = _this.saoRenderTarget.texture;
      _this.vBlurMaterial.uniforms['tDepth'].value = _this.supportsDepthTextureExtension ? depthTexture : _this.depthRenderTarget.texture;

      _this.vBlurMaterial.uniforms['size'].value.set(_this.resolution.x, _this.resolution.y);

      _this.vBlurMaterial.blending = _three.NoBlending;
      _this.hBlurMaterial = new _three.ShaderMaterial({
        uniforms: _three.UniformsUtils.clone(_DepthLimitedBlurShader.DepthLimitedBlurShader.uniforms),
        defines: Object.assign({}, _DepthLimitedBlurShader.DepthLimitedBlurShader.defines),
        vertexShader: _DepthLimitedBlurShader.DepthLimitedBlurShader.vertexShader,
        fragmentShader: _DepthLimitedBlurShader.DepthLimitedBlurShader.fragmentShader
      });
      _this.hBlurMaterial.defines['DEPTH_PACKING'] = _this.supportsDepthTextureExtension ? 0 : 1;
      _this.hBlurMaterial.defines['PERSPECTIVE_CAMERA'] = _this.camera.isPerspectiveCamera ? 1 : 0;
      _this.hBlurMaterial.uniforms['tDiffuse'].value = _this.blurIntermediateRenderTarget.texture;
      _this.hBlurMaterial.uniforms['tDepth'].value = _this.supportsDepthTextureExtension ? depthTexture : _this.depthRenderTarget.texture;

      _this.hBlurMaterial.uniforms['size'].value.set(_this.resolution.x, _this.resolution.y);

      _this.hBlurMaterial.blending = _three.NoBlending;

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

      _this.materialCopy = new _three.ShaderMaterial({
        uniforms: _three.UniformsUtils.clone(_CopyShader.CopyShader.uniforms),
        vertexShader: _CopyShader.CopyShader.vertexShader,
        fragmentShader: _CopyShader.CopyShader.fragmentShader,
        blending: _three.NoBlending
      });
      _this.materialCopy.transparent = true;
      _this.materialCopy.depthTest = false;
      _this.materialCopy.depthWrite = false;
      _this.materialCopy.blending = _three.CustomBlending;
      _this.materialCopy.blendSrc = _three.DstColorFactor;
      _this.materialCopy.blendDst = _three.ZeroFactor;
      _this.materialCopy.blendEquation = _three.AddEquation;
      _this.materialCopy.blendSrcAlpha = _three.DstAlphaFactor;
      _this.materialCopy.blendDstAlpha = _three.ZeroFactor;
      _this.materialCopy.blendEquationAlpha = _three.AddEquation;

      if (_UnpackDepthRGBAShader.UnpackDepthRGBAShader === undefined) {
        console.error('THREE.SAOPass relies on UnpackDepthRGBAShader');
      }

      _this.depthCopy = new _three.ShaderMaterial({
        uniforms: _three.UniformsUtils.clone(_UnpackDepthRGBAShader.UnpackDepthRGBAShader.uniforms),
        vertexShader: _UnpackDepthRGBAShader.UnpackDepthRGBAShader.vertexShader,
        fragmentShader: _UnpackDepthRGBAShader.UnpackDepthRGBAShader.fragmentShader,
        blending: _three.NoBlending
      });
      _this.fsQuad = new _Pass2.FullScreenQuad(null);
      return _this;
    }

    _createClass(SAOPass, [{
      key: "render",
      value: function render(renderer, writeBuffer, readBuffer
      /*, deltaTime, maskActive*/
      ) {
        // Rendering readBuffer first when rendering to screen
        if (this.renderToScreen) {
          this.materialCopy.blending = _three.NoBlending;
          this.materialCopy.uniforms['tDiffuse'].value = readBuffer.texture;
          this.materialCopy.needsUpdate = true;
          this.renderPass(renderer, this.materialCopy, null);
        }

        if (this.params.output === 1) {
          return;
        }

        renderer.getClearColor(this._oldClearColor);
        this.oldClearAlpha = renderer.getClearAlpha();
        var oldAutoClear = renderer.autoClear;
        renderer.autoClear = false;
        renderer.setRenderTarget(this.depthRenderTarget);
        renderer.clear();
        this.saoMaterial.uniforms['bias'].value = this.params.saoBias;
        this.saoMaterial.uniforms['intensity'].value = this.params.saoIntensity;
        this.saoMaterial.uniforms['scale'].value = this.params.saoScale;
        this.saoMaterial.uniforms['kernelRadius'].value = this.params.saoKernelRadius;
        this.saoMaterial.uniforms['minResolution'].value = this.params.saoMinResolution;
        this.saoMaterial.uniforms['cameraNear'].value = this.camera.near;
        this.saoMaterial.uniforms['cameraFar'].value = this.camera.far; // this.saoMaterial.uniforms['randomSeed'].value = Math.random();

        var depthCutoff = this.params.saoBlurDepthCutoff * (this.camera.far - this.camera.near);
        this.vBlurMaterial.uniforms['depthCutoff'].value = depthCutoff;
        this.hBlurMaterial.uniforms['depthCutoff'].value = depthCutoff;
        this.vBlurMaterial.uniforms['cameraNear'].value = this.camera.near;
        this.vBlurMaterial.uniforms['cameraFar'].value = this.camera.far;
        this.hBlurMaterial.uniforms['cameraNear'].value = this.camera.near;
        this.hBlurMaterial.uniforms['cameraFar'].value = this.camera.far;
        this.params.saoBlurRadius = Math.floor(this.params.saoBlurRadius);

        if (this.prevStdDev !== this.params.saoBlurStdDev || this.prevNumSamples !== this.params.saoBlurRadius) {
          _DepthLimitedBlurShader.BlurShaderUtils.configure(this.vBlurMaterial, this.params.saoBlurRadius, this.params.saoBlurStdDev, new _three.Vector2(0, 1));

          _DepthLimitedBlurShader.BlurShaderUtils.configure(this.hBlurMaterial, this.params.saoBlurRadius, this.params.saoBlurStdDev, new _three.Vector2(1, 0));

          this.prevStdDev = this.params.saoBlurStdDev;
          this.prevNumSamples = this.params.saoBlurRadius;
        } // Rendering scene to depth texture


        renderer.setClearColor(0x000000);
        renderer.setRenderTarget(this.beautyRenderTarget);
        renderer.clear();
        renderer.render(this.scene, this.camera); // Re-render scene if depth texture extension is not supported

        if (!this.supportsDepthTextureExtension) {
          // Clear rule : far clipping plane in both RGBA and Basic encoding
          this.renderOverride(renderer, this.depthMaterial, this.depthRenderTarget, 0x000000, 1.0);
        }

        if (this.supportsNormalTexture) {
          // Clear rule : default normal is facing the camera
          this.renderOverride(renderer, this.normalMaterial, this.normalRenderTarget, 0x7777ff, 1.0);
        } // Rendering SAO texture


        this.renderPass(renderer, this.saoMaterial, this.saoRenderTarget, 0xffffff, 1.0); // Blurring SAO texture

        if (this.params.saoBlur) {
          this.renderPass(renderer, this.vBlurMaterial, this.blurIntermediateRenderTarget, 0xffffff, 1.0);
          this.renderPass(renderer, this.hBlurMaterial, this.saoRenderTarget, 0xffffff, 1.0);
        }

        var outputMaterial = this.materialCopy; // Setting up SAO rendering

        if (this.params.output === 3) {
          if (this.supportsDepthTextureExtension) {
            this.materialCopy.uniforms['tDiffuse'].value = this.beautyRenderTarget.depthTexture;
            this.materialCopy.needsUpdate = true;
          } else {
            this.depthCopy.uniforms['tDiffuse'].value = this.depthRenderTarget.texture;
            this.depthCopy.needsUpdate = true;
            outputMaterial = this.depthCopy;
          }
        } else if (this.params.output === 4) {
          this.materialCopy.uniforms['tDiffuse'].value = this.normalRenderTarget.texture;
          this.materialCopy.needsUpdate = true;
        } else {
          this.materialCopy.uniforms['tDiffuse'].value = this.saoRenderTarget.texture;
          this.materialCopy.needsUpdate = true;
        } // Blending depends on output, only want a CustomBlending when showing SAO


        if (this.params.output === 0) {
          outputMaterial.blending = _three.CustomBlending;
        } else {
          outputMaterial.blending = _three.NoBlending;
        } // Rendering SAOPass result on top of previous pass


        this.renderPass(renderer, outputMaterial, this.renderToScreen ? null : readBuffer);
        renderer.setClearColor(this._oldClearColor, this.oldClearAlpha);
        renderer.autoClear = oldAutoClear;
      }
    }, {
      key: "renderPass",
      value: function renderPass(renderer, passMaterial, renderTarget, clearColor, clearAlpha) {
        // save original state
        renderer.getClearColor(this.originalClearColor);
        var originalClearAlpha = renderer.getClearAlpha();
        var originalAutoClear = renderer.autoClear;
        renderer.setRenderTarget(renderTarget); // setup pass state

        renderer.autoClear = false;

        if (clearColor !== undefined && clearColor !== null) {
          renderer.setClearColor(clearColor);
          renderer.setClearAlpha(clearAlpha || 0.0);
          renderer.clear();
        }

        this.fsQuad.material = passMaterial;
        this.fsQuad.render(renderer); // restore original state

        renderer.autoClear = originalAutoClear;
        renderer.setClearColor(this.originalClearColor);
        renderer.setClearAlpha(originalClearAlpha);
      }
    }, {
      key: "renderOverride",
      value: function renderOverride(renderer, overrideMaterial, renderTarget, clearColor, clearAlpha) {
        renderer.getClearColor(this.originalClearColor);
        var originalClearAlpha = renderer.getClearAlpha();
        var originalAutoClear = renderer.autoClear;
        renderer.setRenderTarget(renderTarget);
        renderer.autoClear = false;
        clearColor = overrideMaterial.clearColor || clearColor;
        clearAlpha = overrideMaterial.clearAlpha || clearAlpha;

        if (clearColor !== undefined && clearColor !== null) {
          renderer.setClearColor(clearColor);
          renderer.setClearAlpha(clearAlpha || 0.0);
          renderer.clear();
        }

        this.scene.overrideMaterial = overrideMaterial;
        renderer.render(this.scene, this.camera);
        this.scene.overrideMaterial = null; // restore original state

        renderer.autoClear = originalAutoClear;
        renderer.setClearColor(this.originalClearColor);
        renderer.setClearAlpha(originalClearAlpha);
      }
    }, {
      key: "setSize",
      value: function setSize(width, height) {
        this.beautyRenderTarget.setSize(width, height);
        this.saoRenderTarget.setSize(width, height);
        this.blurIntermediateRenderTarget.setSize(width, height);
        this.normalRenderTarget.setSize(width, height);
        this.depthRenderTarget.setSize(width, height);
        this.saoMaterial.uniforms['size'].value.set(width, height);
        this.saoMaterial.uniforms['cameraInverseProjectionMatrix'].value.copy(this.camera.projectionMatrixInverse);
        this.saoMaterial.uniforms['cameraProjectionMatrix'].value = this.camera.projectionMatrix;
        this.saoMaterial.needsUpdate = true;
        this.vBlurMaterial.uniforms['size'].value.set(width, height);
        this.vBlurMaterial.needsUpdate = true;
        this.hBlurMaterial.uniforms['size'].value.set(width, height);
        this.hBlurMaterial.needsUpdate = true;
      }
    }]);

    return SAOPass;
  }(_Pass2.Pass);

  _exports.SAOPass = SAOPass;
  SAOPass.OUTPUT = {
    'Beauty': 1,
    'Default': 0,
    'SAO': 2,
    'Depth': 3,
    'Normal': 4
  };
});