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

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

  /**
   * Generate a texture that represents the luminosity of the current scene, adapted over time
   * to simulate the optic nerve responding to the amount of light it is receiving.
   * Based on a GDC2007 presentation by Wolfgang Engel titled "Post-Processing Pipeline"
   *
   * Full-screen tone-mapping shader based on http://www.graphics.cornell.edu/~jaf/publications/sig02_paper.pdf
   */
  var AdaptiveToneMappingPass = /*#__PURE__*/function (_Pass) {
    _inherits(AdaptiveToneMappingPass, _Pass);

    var _super = _createSuper(AdaptiveToneMappingPass);

    function AdaptiveToneMappingPass(adaptive, resolution) {
      var _this;

      _classCallCheck(this, AdaptiveToneMappingPass);

      _this = _super.call(this);
      _this.resolution = resolution !== undefined ? resolution : 256;
      _this.needsInit = true;
      _this.adaptive = adaptive !== undefined ? !!adaptive : true;
      _this.luminanceRT = null;
      _this.previousLuminanceRT = null;
      _this.currentLuminanceRT = null;
      if (_CopyShader.CopyShader === undefined) console.error('THREE.AdaptiveToneMappingPass relies on CopyShader');
      var copyShader = _CopyShader.CopyShader;
      _this.copyUniforms = _three.UniformsUtils.clone(copyShader.uniforms);
      _this.materialCopy = new _three.ShaderMaterial({
        uniforms: _this.copyUniforms,
        vertexShader: copyShader.vertexShader,
        fragmentShader: copyShader.fragmentShader,
        blending: _three.NoBlending,
        depthTest: false
      });
      if (_LuminosityShader.LuminosityShader === undefined) console.error('THREE.AdaptiveToneMappingPass relies on LuminosityShader');
      _this.materialLuminance = new _three.ShaderMaterial({
        uniforms: _three.UniformsUtils.clone(_LuminosityShader.LuminosityShader.uniforms),
        vertexShader: _LuminosityShader.LuminosityShader.vertexShader,
        fragmentShader: _LuminosityShader.LuminosityShader.fragmentShader,
        blending: _three.NoBlending
      });
      _this.adaptLuminanceShader = {
        defines: {
          'MIP_LEVEL_1X1': (Math.log(_this.resolution) / Math.log(2.0)).toFixed(1)
        },
        uniforms: {
          'lastLum': {
            value: null
          },
          'currentLum': {
            value: null
          },
          'minLuminance': {
            value: 0.01
          },
          'delta': {
            value: 0.016
          },
          'tau': {
            value: 1.0
          }
        },
        vertexShader: "varying vec2 vUv;\n\n\t\t\t\tvoid main() {\n\n\t\t\t\t\tvUv = uv;\n\t\t\t\t\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n\n\t\t\t\t}",
        fragmentShader: "varying vec2 vUv;\n\n\t\t\t\tuniform sampler2D lastLum;\n\t\t\t\tuniform sampler2D currentLum;\n\t\t\t\tuniform float minLuminance;\n\t\t\t\tuniform float delta;\n\t\t\t\tuniform float tau;\n\n\t\t\t\tvoid main() {\n\n\t\t\t\t\tvec4 lastLum = texture2D( lastLum, vUv, MIP_LEVEL_1X1 );\n\t\t\t\t\tvec4 currentLum = texture2D( currentLum, vUv, MIP_LEVEL_1X1 );\n\n\t\t\t\t\tfloat fLastLum = max( minLuminance, lastLum.r );\n\t\t\t\t\tfloat fCurrentLum = max( minLuminance, currentLum.r );\n\n\t\t\t\t\t//The adaption seems to work better in extreme lighting differences\n\t\t\t\t\t//if the input luminance is squared.\n\t\t\t\t\tfCurrentLum *= fCurrentLum;\n\n\t\t\t\t\t// Adapt the luminance using Pattanaik's technique\n\t\t\t\t\tfloat fAdaptedLum = fLastLum + (fCurrentLum - fLastLum) * (1.0 - exp(-delta * tau));\n\t\t\t\t\t// \"fAdaptedLum = sqrt(fAdaptedLum);\n\t\t\t\t\tgl_FragColor.r = fAdaptedLum;\n\t\t\t\t}"
      };
      _this.materialAdaptiveLum = new _three.ShaderMaterial({
        uniforms: _three.UniformsUtils.clone(_this.adaptLuminanceShader.uniforms),
        vertexShader: _this.adaptLuminanceShader.vertexShader,
        fragmentShader: _this.adaptLuminanceShader.fragmentShader,
        defines: Object.assign({}, _this.adaptLuminanceShader.defines),
        blending: _three.NoBlending
      });
      if (_ToneMapShader.ToneMapShader === undefined) console.error('THREE.AdaptiveToneMappingPass relies on ToneMapShader');
      _this.materialToneMap = new _three.ShaderMaterial({
        uniforms: _three.UniformsUtils.clone(_ToneMapShader.ToneMapShader.uniforms),
        vertexShader: _ToneMapShader.ToneMapShader.vertexShader,
        fragmentShader: _ToneMapShader.ToneMapShader.fragmentShader,
        blending: _three.NoBlending
      });
      _this.fsQuad = new _Pass2.FullScreenQuad(null);
      return _this;
    }

    _createClass(AdaptiveToneMappingPass, [{
      key: "render",
      value: function render(renderer, writeBuffer, readBuffer, deltaTime
      /*, maskActive*/
      ) {
        if (this.needsInit) {
          this.reset(renderer);
          this.luminanceRT.texture.type = readBuffer.texture.type;
          this.previousLuminanceRT.texture.type = readBuffer.texture.type;
          this.currentLuminanceRT.texture.type = readBuffer.texture.type;
          this.needsInit = false;
        }

        if (this.adaptive) {
          //Render the luminance of the current scene into a render target with mipmapping enabled
          this.fsQuad.material = this.materialLuminance;
          this.materialLuminance.uniforms.tDiffuse.value = readBuffer.texture;
          renderer.setRenderTarget(this.currentLuminanceRT);
          this.fsQuad.render(renderer); //Use the new luminance values, the previous luminance and the frame delta to
          //adapt the luminance over time.

          this.fsQuad.material = this.materialAdaptiveLum;
          this.materialAdaptiveLum.uniforms.delta.value = deltaTime;
          this.materialAdaptiveLum.uniforms.lastLum.value = this.previousLuminanceRT.texture;
          this.materialAdaptiveLum.uniforms.currentLum.value = this.currentLuminanceRT.texture;
          renderer.setRenderTarget(this.luminanceRT);
          this.fsQuad.render(renderer); //Copy the new adapted luminance value so that it can be used by the next frame.

          this.fsQuad.material = this.materialCopy;
          this.copyUniforms.tDiffuse.value = this.luminanceRT.texture;
          renderer.setRenderTarget(this.previousLuminanceRT);
          this.fsQuad.render(renderer);
        }

        this.fsQuad.material = this.materialToneMap;
        this.materialToneMap.uniforms.tDiffuse.value = readBuffer.texture;

        if (this.renderToScreen) {
          renderer.setRenderTarget(null);
          this.fsQuad.render(renderer);
        } else {
          renderer.setRenderTarget(writeBuffer);
          if (this.clear) renderer.clear();
          this.fsQuad.render(renderer);
        }
      }
    }, {
      key: "reset",
      value: function reset() {
        // render targets
        if (this.luminanceRT) {
          this.luminanceRT.dispose();
        }

        if (this.currentLuminanceRT) {
          this.currentLuminanceRT.dispose();
        }

        if (this.previousLuminanceRT) {
          this.previousLuminanceRT.dispose();
        }

        var pars = {
          minFilter: _three.LinearFilter,
          magFilter: _three.LinearFilter,
          format: _three.RGBAFormat
        }; // was RGB format. changed to RGBA format. see discussion in #8415 / #8450

        this.luminanceRT = new _three.WebGLRenderTarget(this.resolution, this.resolution, pars);
        this.luminanceRT.texture.name = 'AdaptiveToneMappingPass.l';
        this.luminanceRT.texture.generateMipmaps = false;
        this.previousLuminanceRT = new _three.WebGLRenderTarget(this.resolution, this.resolution, pars);
        this.previousLuminanceRT.texture.name = 'AdaptiveToneMappingPass.pl';
        this.previousLuminanceRT.texture.generateMipmaps = false; // We only need mipmapping for the current luminosity because we want a down-sampled version to sample in our adaptive shader

        pars.minFilter = _three.LinearMipmapLinearFilter;
        pars.generateMipmaps = true;
        this.currentLuminanceRT = new _three.WebGLRenderTarget(this.resolution, this.resolution, pars);
        this.currentLuminanceRT.texture.name = 'AdaptiveToneMappingPass.cl';

        if (this.adaptive) {
          this.materialToneMap.defines['ADAPTED_LUMINANCE'] = '';
          this.materialToneMap.uniforms.luminanceMap.value = this.luminanceRT.texture;
        } //Put something in the adaptive luminance texture so that the scene can render initially


        this.fsQuad.material = new _three.MeshBasicMaterial({
          color: 0x777777
        });
        this.materialLuminance.needsUpdate = true;
        this.materialAdaptiveLum.needsUpdate = true;
        this.materialToneMap.needsUpdate = true; // renderer.render( this.scene, this.camera, this.luminanceRT );
        // renderer.render( this.scene, this.camera, this.previousLuminanceRT );
        // renderer.render( this.scene, this.camera, this.currentLuminanceRT );
      }
    }, {
      key: "setAdaptive",
      value: function setAdaptive(adaptive) {
        if (adaptive) {
          this.adaptive = true;
          this.materialToneMap.defines['ADAPTED_LUMINANCE'] = '';
          this.materialToneMap.uniforms.luminanceMap.value = this.luminanceRT.texture;
        } else {
          this.adaptive = false;
          delete this.materialToneMap.defines['ADAPTED_LUMINANCE'];
          this.materialToneMap.uniforms.luminanceMap.value = null;
        }

        this.materialToneMap.needsUpdate = true;
      }
    }, {
      key: "setAdaptionRate",
      value: function setAdaptionRate(rate) {
        if (rate) {
          this.materialAdaptiveLum.uniforms.tau.value = Math.abs(rate);
        }
      }
    }, {
      key: "setMinLuminance",
      value: function setMinLuminance(minLum) {
        if (minLum) {
          this.materialToneMap.uniforms.minLuminance.value = minLum;
          this.materialAdaptiveLum.uniforms.minLuminance.value = minLum;
        }
      }
    }, {
      key: "setMaxLuminance",
      value: function setMaxLuminance(maxLum) {
        if (maxLum) {
          this.materialToneMap.uniforms.maxLuminance.value = maxLum;
        }
      }
    }, {
      key: "setAverageLuminance",
      value: function setAverageLuminance(avgLum) {
        if (avgLum) {
          this.materialToneMap.uniforms.averageLuminance.value = avgLum;
        }
      }
    }, {
      key: "setMiddleGrey",
      value: function setMiddleGrey(middleGrey) {
        if (middleGrey) {
          this.materialToneMap.uniforms.middleGrey.value = middleGrey;
        }
      }
    }, {
      key: "dispose",
      value: function dispose() {
        if (this.luminanceRT) {
          this.luminanceRT.dispose();
        }

        if (this.previousLuminanceRT) {
          this.previousLuminanceRT.dispose();
        }

        if (this.currentLuminanceRT) {
          this.currentLuminanceRT.dispose();
        }

        if (this.materialLuminance) {
          this.materialLuminance.dispose();
        }

        if (this.materialAdaptiveLum) {
          this.materialAdaptiveLum.dispose();
        }

        if (this.materialCopy) {
          this.materialCopy.dispose();
        }

        if (this.materialToneMap) {
          this.materialToneMap.dispose();
        }
      }
    }]);

    return AdaptiveToneMappingPass;
  }(_Pass2.Pass);

  _exports.AdaptiveToneMappingPass = AdaptiveToneMappingPass;
});