phaser3-rex-plugins/dist/rexinversepipelineplugin.js

Plugins of phaser3

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.rexinversepipelineplugin = factory());
})(this, (function () { 'use strict';

  const frag = `\
#ifdef GL_FRAGMENT_PRECISION_HIGH
#define highmedp highp
#else
#define highmedp mediump
#endif
precision highmedp float;

// Scene buffer
uniform sampler2D uMainSampler; 
varying vec2 outTexCoord;

// Effect parameters
uniform float intensity;

void main (void) {
  vec4 front = texture2D(uMainSampler, outTexCoord);
  vec3 inverse = vec3(front.a - front.rgb);
  gl_FragColor = vec4(mix(front.rgb, inverse, intensity), front.a);
}
`;

  const PostFXPipeline = Phaser.Renderer.WebGL.Pipelines.PostFXPipeline;
  const GetValue = Phaser.Utils.Objects.GetValue;

  class InversePostFxPipeline extends PostFXPipeline {
      constructor(game) {
          super({
              name: 'rexInversePostFx',
              game: game,
              renderTarget: true,
              fragShader: frag
          });

          this.intensity = 1;
      }

      resetFromJSON(o) {
          this.setIntensity(GetValue(o, 'intensity', 1));
          return this;
      }

      onPreRender() {
          this.set1f('intensity', this.intensity);
      }

      // intensity
      setIntensity(value) {
          this.intensity = value;
          return this;
      }
  }

  const GameClass = Phaser.Game;
  var IsGame = function (object) {
      return (object instanceof GameClass);
  };

  const SceneClass = Phaser.Scene;
  var IsSceneObject = function (object) {
      return (object instanceof SceneClass);
  };

  var GetGame = function (object) {
      if ((object == null) || (typeof (object) !== 'object')) {
          return null;
      } else if (IsGame(object)) {
          return object;
      } else if (IsGame(object.game)) {
          return object.game;
      } else if (IsSceneObject(object)) { // object = scene object
          return object.sys.game;
      } else if (IsSceneObject(object.scene)) { // object = game object
          return object.scene.sys.game;
      }
  };

  var RegisterPostPipeline = function (game, postFxPipelineName, PostFxPipelineClass) {
      GetGame(game).renderer.pipelines.addPostPipeline(postFxPipelineName, PostFxPipelineClass);
  };

  var AddPostFxPipelineInstance = function (gameObject, PostFxPipelineClass, config) {
      if (config === undefined) {
          config = {};
      }

      gameObject.setPostPipeline(PostFxPipelineClass);
      var pipeline = gameObject.postPipelines[gameObject.postPipelines.length - 1];
      pipeline.resetFromJSON(config);

      if (config.name) {
          pipeline.name = config.name;
      }

      return pipeline;
  };

  const SpliceOne = Phaser.Utils.Array.SpliceOne;

  var RemovePostFxPipelineInstance = function (gameObject, PostFxPipelineClass, name) {
      if (name === undefined) {
          var pipelines = gameObject.postPipelines;
          for (var i = (pipelines.length - 1); i >= 0; i--) {
              var instance = pipelines[i];
              if (instance instanceof PostFxPipelineClass) {
                  instance.destroy();
                  SpliceOne(pipelines, i);
              }
          }
      } else {
          var pipelines = gameObject.postPipelines;
          for (var i = 0, cnt = pipelines.length; i < cnt; i++) {
              var instance = pipelines[i];
              if ((instance instanceof PostFxPipelineClass) && (instance.name === name)) {
                  instance.destroy();
                  SpliceOne(pipelines, i);
              }
          }
      }

      gameObject.hasPostPipeline = (gameObject.postPipelines.length > 0);

  };

  var GetPostFxPipelineInstance = function (gameObject, PostFxPipelineClass, name) {    
      if (name === undefined) {
          var result = [];
          var pipelines = gameObject.postPipelines;
          for (var i = 0, cnt = pipelines.length; i < cnt; i++) {
              var instance = pipelines[i];
              if (instance instanceof PostFxPipelineClass) {
                  result.push(instance);
              }
          }
          return result;
      } else {
          var pipelines = gameObject.postPipelines;
          for (var i = 0, cnt = pipelines.length; i < cnt; i++) {
              var instance = pipelines[i];
              if ((instance instanceof PostFxPipelineClass) && (instance.name === name)) {
                  return instance;
              }
          }
      }
  };

  class BasePostFxPipelinePlugin extends Phaser.Plugins.BasePlugin {
      setPostPipelineClass(PostFxPipelineClass, postFxPipelineName) {
          this.PostFxPipelineClass = PostFxPipelineClass;
          this.postFxPipelineName = postFxPipelineName;
          return this;
      }

      start() {
          var eventEmitter = this.game.events;
          eventEmitter.once('destroy', this.destroy, this);

          RegisterPostPipeline(this.game, this.postFxPipelineName, this.PostFxPipelineClass);
      }

      add(gameObject, config) {
          return AddPostFxPipelineInstance(gameObject, this.PostFxPipelineClass, config);
      }

      remove(gameObject, name) {
          RemovePostFxPipelineInstance(gameObject, this.PostFxPipelineClass, name);
          return this;
      }

      get(gameObject, name) {
          return GetPostFxPipelineInstance(gameObject, this.PostFxPipelineClass, name);
      }
  }

  var IsNil = function (value) {
      return value === null || value === undefined;
  };

  var IsObjectLike = function (value) {
      return value !== null && typeof value === 'object';
  };

  var NormalizePath = function (path, delimiter) {
      if (Array.isArray(path)) ; else if (typeof path !== 'string') {
          path = [];
      } else if (path.trim() === '') {
          path = [];
      } else {
          path = path.split(delimiter).filter(Boolean);
      }
      return path;
  };

  /**
   * Set a nested value into target by path (mutates target).
   *
   * - If keys is a string and does NOT contain delimiter, write directly.
   * - Intermediate non-plain-object values are always overwritten with {}.
   *
   * @param {object} target
   * @param {string|string[]} keys
   * @param {*} value
   * @param {string} [delimiter='.']
   * @returns {object} the same target reference
   */
  var SetValue = function (target, keys, value, delimiter = '.') {
      if (!IsObjectLike(target)) {
          return target;
      }

      // Invalid key: no-op; don't replace root
      if (IsNil(keys) || keys === '' || (Array.isArray(keys) && keys.length === 0)) {
          return target;
      }

      // Fast path: single key
      if (
          (typeof keys === 'string' && keys.indexOf(delimiter) === -1) ||
          (typeof keys === 'number')
      ) {
          target[keys] = value;
          return target;
      }

      var pathSegments = NormalizePath(keys, delimiter);
      if (pathSegments.length === 0) {
          return target;
      }

      var cursor = target;
      var pathSegmentsCount = pathSegments.length;

      for (var index = 0; index < pathSegmentsCount - 1; index++) {
          var segment = pathSegments[index];
          var next = cursor[segment];

          if (!IsObjectLike(next)) {
              // Force overwrite intermediates
              cursor[segment] = {};
          }

          cursor = cursor[segment];
      }

      cursor[pathSegments[pathSegmentsCount - 1]] = value;
      return target;
  };

  class InversePipelinePlugin extends BasePostFxPipelinePlugin {
      constructor(pluginManager) {
          super(pluginManager);
          this.setPostPipelineClass(InversePostFxPipeline, 'rexInversePostFx');
      }
  }

  SetValue(window, 'RexPlugins.Pipelines.InversePostFx', InversePostFxPipeline);

  return InversePipelinePlugin;

}));