From c9136d5812b83acc993e18ea098f02e841915740 Mon Sep 17 00:00:00 2001
From: Stanisław Zagórowski <hasohasacz@gmail.com>
Date: Mon, 16 Mar 2026 20:26:35 +0100
Subject: update glslcanvas to be served locally

---
 public/assets/GlslCanvas.js | 2064 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 2064 insertions(+)
 create mode 100644 public/assets/GlslCanvas.js

(limited to 'public/assets/GlslCanvas.js')

diff --git a/public/assets/GlslCanvas.js b/public/assets/GlslCanvas.js
new file mode 100644
index 0000000..ab29380
--- /dev/null
+++ b/public/assets/GlslCanvas.js
@@ -0,0 +1,2064 @@
+// MIT, from https://github.com/patriciogonzalezvivo/glslCanvas/blob/master/dist/GlslCanvas.js
+
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+	typeof define === 'function' && define.amd ? define(factory) :
+	(global.GlslCanvas = factory());
+}(this, (function () { 'use strict';
+
+var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+
+var win;
+
+if (typeof window !== "undefined") {
+    win = window;
+} else if (typeof commonjsGlobal !== "undefined") {
+    win = commonjsGlobal;
+} else if (typeof self !== "undefined"){
+    win = self;
+} else {
+    win = {};
+}
+
+var window_1 = win;
+
+var isFunction_1 = isFunction;
+
+var toString = Object.prototype.toString;
+
+function isFunction (fn) {
+  if (!fn) {
+    return false
+  }
+  var string = toString.call(fn);
+  return string === '[object Function]' ||
+    (typeof fn === 'function' && string !== '[object RegExp]') ||
+    (typeof window !== 'undefined' &&
+     // IE8 and below
+     (fn === window.setTimeout ||
+      fn === window.alert ||
+      fn === window.confirm ||
+      fn === window.prompt))
+}
+
+var trim = function(string) {
+  return string.replace(/^\s+|\s+$/g, '');
+};
+var isArray = function(arg) {
+      return Object.prototype.toString.call(arg) === '[object Array]';
+    };
+
+var parseHeaders = function (headers) {
+  if (!headers)
+    return {}
+
+  var result = {};
+
+  var headersArr = trim(headers).split('\n');
+
+  for (var i = 0; i < headersArr.length; i++) {
+    var row = headersArr[i];
+    var index = row.indexOf(':')
+    , key = trim(row.slice(0, index)).toLowerCase()
+    , value = trim(row.slice(index + 1));
+
+    if (typeof(result[key]) === 'undefined') {
+      result[key] = value;
+    } else if (isArray(result[key])) {
+      result[key].push(value);
+    } else {
+      result[key] = [ result[key], value ];
+    }
+  }
+
+  return result
+};
+
+var immutable = extend;
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function extend() {
+    var target = {};
+
+    for (var i = 0; i < arguments.length; i++) {
+        var source = arguments[i];
+
+        for (var key in source) {
+            if (hasOwnProperty.call(source, key)) {
+                target[key] = source[key];
+            }
+        }
+    }
+
+    return target
+}
+
+"use strict";
+
+
+
+
+
+var xhr = createXHR;
+// Allow use of default import syntax in TypeScript
+var default_1 = createXHR;
+createXHR.XMLHttpRequest = window_1.XMLHttpRequest || noop;
+createXHR.XDomainRequest = "withCredentials" in (new createXHR.XMLHttpRequest()) ? createXHR.XMLHttpRequest : window_1.XDomainRequest;
+
+forEachArray(["get", "put", "post", "patch", "head", "delete"], function(method) {
+    createXHR[method === "delete" ? "del" : method] = function(uri, options, callback) {
+        options = initParams(uri, options, callback);
+        options.method = method.toUpperCase();
+        return _createXHR(options)
+    };
+});
+
+function forEachArray(array, iterator) {
+    for (var i = 0; i < array.length; i++) {
+        iterator(array[i]);
+    }
+}
+
+function isEmpty(obj){
+    for(var i in obj){
+        if(obj.hasOwnProperty(i)) return false
+    }
+    return true
+}
+
+function initParams(uri, options, callback) {
+    var params = uri;
+
+    if (isFunction_1(options)) {
+        callback = options;
+        if (typeof uri === "string") {
+            params = {uri:uri};
+        }
+    } else {
+        params = immutable(options, {uri: uri});
+    }
+
+    params.callback = callback;
+    return params
+}
+
+function createXHR(uri, options, callback) {
+    options = initParams(uri, options, callback);
+    return _createXHR(options)
+}
+
+function _createXHR(options) {
+    if(typeof options.callback === "undefined"){
+        throw new Error("callback argument missing")
+    }
+
+    var called = false;
+    var callback = function cbOnce(err, response, body){
+        if(!called){
+            called = true;
+            options.callback(err, response, body);
+        }
+    };
+
+    function readystatechange() {
+        if (xhr.readyState === 4) {
+            setTimeout(loadFunc, 0);
+        }
+    }
+
+    function getBody() {
+        // Chrome with requestType=blob throws errors arround when even testing access to responseText
+        var body = undefined;
+
+        if (xhr.response) {
+            body = xhr.response;
+        } else {
+            body = xhr.responseText || getXml(xhr);
+        }
+
+        if (isJson) {
+            try {
+                body = JSON.parse(body);
+            } catch (e) {}
+        }
+
+        return body
+    }
+
+    function errorFunc(evt) {
+        clearTimeout(timeoutTimer);
+        if(!(evt instanceof Error)){
+            evt = new Error("" + (evt || "Unknown XMLHttpRequest Error") );
+        }
+        evt.statusCode = 0;
+        return callback(evt, failureResponse)
+    }
+
+    // will load the data & process the response in a special response object
+    function loadFunc() {
+        if (aborted) return
+        var status;
+        clearTimeout(timeoutTimer);
+        if(options.useXDR && xhr.status===undefined) {
+            //IE8 CORS GET successful response doesn't have a status field, but body is fine
+            status = 200;
+        } else {
+            status = (xhr.status === 1223 ? 204 : xhr.status);
+        }
+        var response = failureResponse;
+        var err = null;
+
+        if (status !== 0){
+            response = {
+                body: getBody(),
+                statusCode: status,
+                method: method,
+                headers: {},
+                url: uri,
+                rawRequest: xhr
+            };
+            if(xhr.getAllResponseHeaders){ //remember xhr can in fact be XDR for CORS in IE
+                response.headers = parseHeaders(xhr.getAllResponseHeaders());
+            }
+        } else {
+            err = new Error("Internal XMLHttpRequest Error");
+        }
+        return callback(err, response, response.body)
+    }
+
+    var xhr = options.xhr || null;
+
+    if (!xhr) {
+        if (options.cors || options.useXDR) {
+            xhr = new createXHR.XDomainRequest();
+        }else{
+            xhr = new createXHR.XMLHttpRequest();
+        }
+    }
+
+    var key;
+    var aborted;
+    var uri = xhr.url = options.uri || options.url;
+    var method = xhr.method = options.method || "GET";
+    var body = options.body || options.data;
+    var headers = xhr.headers = options.headers || {};
+    var sync = !!options.sync;
+    var isJson = false;
+    var timeoutTimer;
+    var failureResponse = {
+        body: undefined,
+        headers: {},
+        statusCode: 0,
+        method: method,
+        url: uri,
+        rawRequest: xhr
+    };
+
+    if ("json" in options && options.json !== false) {
+        isJson = true;
+        headers["accept"] || headers["Accept"] || (headers["Accept"] = "application/json"); //Don't override existing accept header declared by user
+        if (method !== "GET" && method !== "HEAD") {
+            headers["content-type"] || headers["Content-Type"] || (headers["Content-Type"] = "application/json"); //Don't override existing accept header declared by user
+            body = JSON.stringify(options.json === true ? body : options.json);
+        }
+    }
+
+    xhr.onreadystatechange = readystatechange;
+    xhr.onload = loadFunc;
+    xhr.onerror = errorFunc;
+    // IE9 must have onprogress be set to a unique function.
+    xhr.onprogress = function () {
+        // IE must die
+    };
+    xhr.onabort = function(){
+        aborted = true;
+    };
+    xhr.ontimeout = errorFunc;
+    xhr.open(method, uri, !sync, options.username, options.password);
+    //has to be after open
+    if(!sync) {
+        xhr.withCredentials = !!options.withCredentials;
+    }
+    // Cannot set timeout with sync request
+    // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly
+    // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent
+    if (!sync && options.timeout > 0 ) {
+        timeoutTimer = setTimeout(function(){
+            if (aborted) return
+            aborted = true;//IE9 may still call readystatechange
+            xhr.abort("timeout");
+            var e = new Error("XMLHttpRequest timeout");
+            e.code = "ETIMEDOUT";
+            errorFunc(e);
+        }, options.timeout );
+    }
+
+    if (xhr.setRequestHeader) {
+        for(key in headers){
+            if(headers.hasOwnProperty(key)){
+                xhr.setRequestHeader(key, headers[key]);
+            }
+        }
+    } else if (options.headers && !isEmpty(options.headers)) {
+        throw new Error("Headers cannot be set on an XDomainRequest object")
+    }
+
+    if ("responseType" in options) {
+        xhr.responseType = options.responseType;
+    }
+
+    if ("beforeSend" in options &&
+        typeof options.beforeSend === "function"
+    ) {
+        options.beforeSend(xhr);
+    }
+
+    // Microsoft Edge browser sends "undefined" when send is called with undefined value.
+    // XMLHttpRequest spec says to pass null as body to indicate no body
+    // See https://github.com/naugtur/xhr/issues/100.
+    xhr.send(body || null);
+
+    return xhr
+
+
+}
+
+function getXml(xhr) {
+    // xhr.responseXML will throw Exception "InvalidStateError" or "DOMException"
+    // See https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseXML.
+    try {
+        if (xhr.responseType === "document") {
+            return xhr.responseXML
+        }
+        var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === "parsererror";
+        if (xhr.responseType === "" && !firefoxBugTakenEffect) {
+            return xhr.responseXML
+        }
+    } catch (e) {}
+
+    return null
+}
+
+function noop() {}
+
+xhr.default = default_1;
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
+  return typeof obj;
+} : function (obj) {
+  return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+};
+
+
+
+
+
+var asyncGenerator = function () {
+  function AwaitValue(value) {
+    this.value = value;
+  }
+
+  function AsyncGenerator(gen) {
+    var front, back;
+
+    function send(key, arg) {
+      return new Promise(function (resolve, reject) {
+        var request = {
+          key: key,
+          arg: arg,
+          resolve: resolve,
+          reject: reject,
+          next: null
+        };
+
+        if (back) {
+          back = back.next = request;
+        } else {
+          front = back = request;
+          resume(key, arg);
+        }
+      });
+    }
+
+    function resume(key, arg) {
+      try {
+        var result = gen[key](arg);
+        var value = result.value;
+
+        if (value instanceof AwaitValue) {
+          Promise.resolve(value.value).then(function (arg) {
+            resume("next", arg);
+          }, function (arg) {
+            resume("throw", arg);
+          });
+        } else {
+          settle(result.done ? "return" : "normal", result.value);
+        }
+      } catch (err) {
+        settle("throw", err);
+      }
+    }
+
+    function settle(type, value) {
+      switch (type) {
+        case "return":
+          front.resolve({
+            value: value,
+            done: true
+          });
+          break;
+
+        case "throw":
+          front.reject(value);
+          break;
+
+        default:
+          front.resolve({
+            value: value,
+            done: false
+          });
+          break;
+      }
+
+      front = front.next;
+
+      if (front) {
+        resume(front.key, front.arg);
+      } else {
+        back = null;
+      }
+    }
+
+    this._invoke = send;
+
+    if (typeof gen.return !== "function") {
+      this.return = undefined;
+    }
+  }
+
+  if (typeof Symbol === "function" && Symbol.asyncIterator) {
+    AsyncGenerator.prototype[Symbol.asyncIterator] = function () {
+      return this;
+    };
+  }
+
+  AsyncGenerator.prototype.next = function (arg) {
+    return this._invoke("next", arg);
+  };
+
+  AsyncGenerator.prototype.throw = function (arg) {
+    return this._invoke("throw", arg);
+  };
+
+  AsyncGenerator.prototype.return = function (arg) {
+    return this._invoke("return", arg);
+  };
+
+  return {
+    wrap: function (fn) {
+      return function () {
+        return new AsyncGenerator(fn.apply(this, arguments));
+      };
+    },
+    await: function (value) {
+      return new AwaitValue(value);
+    }
+  };
+}();
+
+
+
+
+
+var classCallCheck = function (instance, Constructor) {
+  if (!(instance instanceof Constructor)) {
+    throw new TypeError("Cannot call a class as a function");
+  }
+};
+
+var createClass = 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);
+    }
+  }
+
+  return function (Constructor, protoProps, staticProps) {
+    if (protoProps) defineProperties(Constructor.prototype, protoProps);
+    if (staticProps) defineProperties(Constructor, staticProps);
+    return Constructor;
+  };
+}();
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+var toConsumableArray = function (arr) {
+  if (Array.isArray(arr)) {
+    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
+
+    return arr2;
+  } else {
+    return Array.from(arr);
+  }
+};
+
+var lastError = '';
+
+/**
+ * Creates the HTLM for a failure message
+ * @param {string} canvasContainerId id of container of th
+ *        canvas.
+ * @return {string} The html.
+ */
+function makeFailHTML(msg) {
+    return '\n<table style="background-color: #8CE; width: 100%; height: 100%;"><tr>\n<td align="center">\n<div style="display: table-cell; vertical-align: middle;">\n<div style="">' + msg + '</div>\n</div>\n</td></tr></table>\n';
+}
+
+/**
+ * Message for getting a webgl browser
+ * @type {string}
+ */
+var GET_A_WEBGL_BROWSER = '\n\tThis page requires a browser that supports WebGL.<br/>\n\t<a href="http://get.webgl.org">Click here to upgrade your browser.</a>\n';
+
+/**
+ * Message for need better hardware
+ * @type {string}
+ */
+var OTHER_PROBLEM = '\n\tIt does not appear your computer can support WebGL.<br/>\n\t<a href="http://get.webgl.org/troubleshooting/">Click here for more information.</a>\n';
+
+/**
+ * Code to return in `onError` callback when the browser doesn't support webgl
+ * @type {number}
+ */
+var ERROR_BROWSER_SUPPORT = 1;
+
+/**
+ * Code to return in `onError` callback there's any other problem related to webgl
+ * @type {number}
+ */
+var ERROR_OTHER = 2;
+
+/**
+ * Creates a webgl context. If creation fails it will
+ * change the contents of the container of the <canvas>
+ * tag to an error message with the correct links for WebGL,
+ * unless `onError` option is defined to a callback,
+ * which allows for custom error handling..
+ * @param {Element} canvas. The canvas element to create a
+ *     context from.
+ * @param {WebGLContextCreationAttributes} optAttribs Any
+ *     creation attributes you want to pass in.
+ * @return {WebGLRenderingContext} The created context.
+ */
+function setupWebGL(canvas, optAttribs, onError) {
+    function showLink(str) {
+        var container = canvas.parentNode;
+        if (container) {
+            container.innerHTML = makeFailHTML(str);
+        }
+    }
+
+    function handleError(errorCode, msg) {
+        if (typeof onError === 'function') {
+            onError(errorCode);
+        } else {
+            showLink(msg);
+        }
+    }
+
+    if (!window.WebGLRenderingContext) {
+        handleError(ERROR_BROWSER_SUPPORT, GET_A_WEBGL_BROWSER);
+        return null;
+    }
+
+    var context = create3DContext(canvas, optAttribs);
+    if (!context) {
+        handleError(ERROR_OTHER, OTHER_PROBLEM);
+    } else {
+        context.getExtension('OES_standard_derivatives');
+    }
+    return context;
+}
+
+/**
+ * Creates a webgl context.
+ * @param {!Canvas} canvas The canvas tag to get context
+ *     from. If one is not passed in one will be created.
+ * @return {!WebGLContext} The created context.
+ */
+function create3DContext(canvas, optAttribs) {
+    var names = ['webgl', 'experimental-webgl'];
+    var context = null;
+    for (var ii = 0; ii < names.length; ++ii) {
+        try {
+            context = canvas.getContext(names[ii], optAttribs);
+        } catch (e) {
+            if (context) {
+                break;
+            }
+        }
+    }
+    return context;
+}
+
+/*
+ *	Create a Vertex of a specific type (gl.VERTEX_SHADER/)
+ */
+function createShader(main, source, type, offset) {
+    var gl = main.gl;
+
+    var shader = gl.createShader(type);
+    gl.shaderSource(shader, source);
+    gl.compileShader(shader);
+
+    var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
+
+    if (!compiled) {
+        // Something went wrong during compilation; get the error
+        lastError = gl.getShaderInfoLog(shader);
+        console.error('*** Error compiling shader ' + shader + ':' + lastError);
+        main.trigger('error', {
+            shader: shader,
+            source: source,
+            type: type,
+            error: lastError,
+            offset: offset || 0
+        });
+        gl.deleteShader(shader);
+        return null;
+    }
+
+    return shader;
+}
+
+/**
+ * Loads a shader.
+ * @param {!WebGLContext} gl The WebGLContext to use.
+ * @param {string} shaderSource The shader source.
+ * @param {number} shaderType The type of shader.
+ * @param {function(string): void) opt_errorCallback callback for errors.
+ * @return {!WebGLShader} The created shader.
+ */
+function createProgram(main, shaders, optAttribs, optLocations) {
+    var gl = main.gl;
+
+    var program = gl.createProgram();
+    for (var ii = 0; ii < shaders.length; ++ii) {
+        gl.attachShader(program, shaders[ii]);
+    }
+    if (optAttribs) {
+        for (var _ii = 0; _ii < optAttribs.length; ++_ii) {
+            gl.bindAttribLocation(program, optLocations ? optLocations[_ii] : _ii, optAttribs[_ii]);
+        }
+    }
+    gl.linkProgram(program);
+
+    // Check the link status
+    var linked = gl.getProgramParameter(program, gl.LINK_STATUS);
+    if (!linked) {
+        // something went wrong with the link
+        lastError = gl.getProgramInfoLog(program);
+        console.log('Error in program linking:' + lastError);
+        gl.deleteProgram(program);
+        return null;
+    }
+    return program;
+}
+
+// By Brett Camber on
+// https://github.com/tangrams/tangram/blob/master/src/gl/glsl.js
+function parseUniforms(uniforms) {
+    var prefix = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
+
+    var parsed = [];
+
+    for (var name in uniforms) {
+        var uniform = uniforms[name];
+        var u = void 0;
+
+        if (prefix) {
+            name = prefix + '.' + name;
+        }
+
+        // Single float
+        if (typeof uniform === 'number') {
+            parsed.push({
+                type: 'float',
+                method: '1f',
+                name: name,
+                value: uniform
+            });
+        }
+        // Array: vector, array of floats, array of textures, or array of structs
+        else if (Array.isArray(uniform)) {
+                // Numeric values
+                if (typeof uniform[0] === 'number') {
+                    // float vectors (vec2, vec3, vec4)
+                    if (uniform.length === 1) {
+                        parsed.push({
+                            type: 'float',
+                            method: '1f',
+                            name: name,
+                            value: uniform
+                        });
+                    }
+                    // float vectors (vec2, vec3, vec4)
+                    else if (uniform.length >= 2 && uniform.length <= 4) {
+                            parsed.push({
+                                type: 'vec' + uniform.length,
+                                method: uniform.length + 'fv',
+                                name: name,
+                                value: uniform
+                            });
+                        }
+                        // float array
+                        else if (uniform.length > 4) {
+                                parsed.push({
+                                    type: 'float[]',
+                                    method: '1fv',
+                                    name: name + '[0]',
+                                    value: uniform
+                                });
+                            }
+                    // TODO: assume matrix for (typeof == Float32Array && length == 16)?
+                }
+                // Array of textures
+                else if (typeof uniform[0] === 'string') {
+                        parsed.push({
+                            type: 'sampler2D',
+                            method: '1i',
+                            name: name,
+                            value: uniform
+                        });
+                    }
+                    // Array of arrays - but only arrays of vectors are allowed in this case
+                    else if (Array.isArray(uniform[0]) && typeof uniform[0][0] === 'number') {
+                            // float vectors (vec2, vec3, vec4)
+                            if (uniform[0].length >= 2 && uniform[0].length <= 4) {
+                                // Set each vector in the array
+                                for (u = 0; u < uniform.length; u++) {
+                                    parsed.push({
+                                        type: 'vec' + uniform[0].length,
+                                        method: uniform[u].length + 'fv',
+                                        name: name + '[' + u + ']',
+                                        value: uniform[u]
+                                    });
+                                }
+                            }
+                            // else error?
+                        }
+                        // Array of structures
+                        else if (_typeof(uniform[0]) === 'object') {
+                                for (u = 0; u < uniform.length; u++) {
+                                    // Set each struct in the array
+                                    parsed.push.apply(parsed, toConsumableArray(parseUniforms(uniform[u], name + '[' + u + ']')));
+                                }
+                            }
+            }
+            // Boolean
+            else if (typeof uniform === 'boolean') {
+                    parsed.push({
+                        type: 'bool',
+                        method: '1i',
+                        name: name,
+                        value: uniform
+                    });
+                }
+                // Texture
+                else if (typeof uniform === 'string') {
+                        parsed.push({
+                            type: 'sampler2D',
+                            method: '1i',
+                            name: name,
+                            value: uniform
+                        });
+                    }
+                    // Structure
+                    else if ((typeof uniform === 'undefined' ? 'undefined' : _typeof(uniform)) === 'object') {
+                            // Set each field in the struct
+                            parsed.push.apply(parsed, toConsumableArray(parseUniforms(uniform, name)));
+                        }
+        // TODO: support other non-float types? (int, etc.)
+    }
+    return parsed;
+}
+
+function isCanvasVisible(canvas) {
+    var bound = canvas.getBoundingClientRect();
+    return bound.top + bound.height > 0 && bound.top < (window.innerHeight || document.documentElement.clientHeight);
+}
+
+function isPowerOf2(value) {
+    return (value & value - 1) === 0;
+}
+
+function isSafari() {
+    return (/^((?!chrome|android).)*safari/i.test(navigator.userAgent)
+    );
+}
+
+
+
+
+
+
+
+function isDiff(a, b) {
+    if (a && b) {
+        return a.toString() !== b.toString();
+    }
+    return false;
+}
+
+function getFile(url) {
+    var httpRequest = new XMLHttpRequest();
+    httpRequest.open("GET", url, false);
+    httpRequest.send();
+    if (httpRequest.status == 200) return httpRequest.responseText;else return "";
+}
+
+function subscribeMixin$1(target) {
+    var listeners = new Set();
+
+    return Object.assign(target, {
+        on: function on(type, f) {
+            var listener = {};
+            listener[type] = f;
+            listeners.add(listener);
+        },
+        off: function off(type, f) {
+            if (f) {
+                var listener = {};
+                listener[type] = f;
+                listeners.delete(listener);
+            } else {
+                var _iteratorNormalCompletion = true;
+                var _didIteratorError = false;
+                var _iteratorError = undefined;
+
+                try {
+                    for (var _iterator = listeners[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+                        var item = _step.value;
+                        var _iteratorNormalCompletion2 = true;
+                        var _didIteratorError2 = false;
+                        var _iteratorError2 = undefined;
+
+                        try {
+                            for (var _iterator2 = Object.keys(item)[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
+                                var key = _step2.value;
+
+                                if (key === type) {
+                                    listeners.delete(item);
+                                    return;
+                                }
+                            }
+                        } catch (err) {
+                            _didIteratorError2 = true;
+                            _iteratorError2 = err;
+                        } finally {
+                            try {
+                                if (!_iteratorNormalCompletion2 && _iterator2.return) {
+                                    _iterator2.return();
+                                }
+                            } finally {
+                                if (_didIteratorError2) {
+                                    throw _iteratorError2;
+                                }
+                            }
+                        }
+                    }
+                } catch (err) {
+                    _didIteratorError = true;
+                    _iteratorError = err;
+                } finally {
+                    try {
+                        if (!_iteratorNormalCompletion && _iterator.return) {
+                            _iterator.return();
+                        }
+                    } finally {
+                        if (_didIteratorError) {
+                            throw _iteratorError;
+                        }
+                    }
+                }
+            }
+        },
+        listSubscriptions: function listSubscriptions() {
+            var _iteratorNormalCompletion3 = true;
+            var _didIteratorError3 = false;
+            var _iteratorError3 = undefined;
+
+            try {
+                for (var _iterator3 = listeners[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
+                    var item = _step3.value;
+
+                    console.log(item);
+                }
+            } catch (err) {
+                _didIteratorError3 = true;
+                _iteratorError3 = err;
+            } finally {
+                try {
+                    if (!_iteratorNormalCompletion3 && _iterator3.return) {
+                        _iterator3.return();
+                    }
+                } finally {
+                    if (_didIteratorError3) {
+                        throw _iteratorError3;
+                    }
+                }
+            }
+        },
+        subscribe: function subscribe(listener) {
+            listeners.add(listener);
+        },
+        unsubscribe: function unsubscribe(listener) {
+            listeners.delete(listener);
+        },
+        unsubscribeAll: function unsubscribeAll() {
+            listeners.clear();
+        },
+        trigger: function trigger(event) {
+            for (var _len = arguments.length, data = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+                data[_key - 1] = arguments[_key];
+            }
+
+            var _iteratorNormalCompletion4 = true;
+            var _didIteratorError4 = false;
+            var _iteratorError4 = undefined;
+
+            try {
+                for (var _iterator4 = listeners[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
+                    var listener = _step4.value;
+
+                    if (typeof listener[event] === 'function') {
+                        listener[event].apply(listener, toConsumableArray(data));
+                    }
+                }
+            } catch (err) {
+                _didIteratorError4 = true;
+                _iteratorError4 = err;
+            } finally {
+                try {
+                    if (!_iteratorNormalCompletion4 && _iterator4.return) {
+                        _iterator4.return();
+                    }
+                } finally {
+                    if (_didIteratorError4) {
+                        throw _iteratorError4;
+                    }
+                }
+            }
+        }
+    });
+}
+
+// Texture management
+// GL texture wrapper object for keeping track of a global set of textures, keyed by a unique user-defined name
+
+var Texture = function () {
+    function Texture(gl, name) {
+        var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+        classCallCheck(this, Texture);
+
+        subscribeMixin$1(this);
+
+        this.gl = gl;
+        this.texture = gl.createTexture();
+        if (this.texture) {
+            this.valid = true;
+        }
+        this.bind();
+
+        this.name = name;
+        this.source = null;
+        this.sourceType = null;
+        this.loading = null; // a Promise object to track the loading state of this texture
+
+        // Default to a 1-pixel black texture so we can safely render while we wait for an image to load
+        // See: http://stackoverflow.com/questions/19722247/webgl-wait-for-texture-to-load
+        this.setData(1, 1, new Uint8Array([0, 0, 0, 255]), { filtering: 'linear' });
+        this.setFiltering(options.filtering);
+
+        this.load(options);
+    }
+
+    // Destroy a single texture instance
+
+
+    createClass(Texture, [{
+        key: 'destroy',
+        value: function destroy() {
+            if (!this.valid) {
+                return;
+            }
+            this.gl.deleteTexture(this.texture);
+            this.texture = null;
+            delete this.data;
+            this.data = null;
+            this.valid = false;
+        }
+    }, {
+        key: 'bind',
+        value: function bind(unit) {
+            if (!this.valid) {
+                return;
+            }
+            if (typeof unit === 'number') {
+                if (Texture.activeUnit !== unit) {
+                    this.gl.activeTexture(this.gl.TEXTURE0 + unit);
+                    Texture.activeUnit = unit;
+                }
+            }
+            if (Texture.activeTexture !== this.texture) {
+                this.gl.bindTexture(this.gl.TEXTURE_2D, this.texture);
+                Texture.activeTexture = this.texture;
+            }
+        }
+    }, {
+        key: 'load',
+        value: function load() {
+            var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+
+            this.loading = null;
+
+            if (typeof options.url === 'string') {
+                if (this.url === undefined || options.url !== this.url) {
+                    this.setUrl(options.url, options);
+                }
+            } else if (options.element) {
+                this.setElement(options.element, options);
+            } else if (options.data && options.width && options.height) {
+                this.setData(options.width, options.height, options.data, options);
+            }
+        }
+
+        // Sets texture from an url
+
+    }, {
+        key: 'setUrl',
+        value: function setUrl(url) {
+            var _this = this;
+
+            var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+            if (!this.valid) {
+                return;
+            }
+
+            this.url = url; // save URL reference (will be overwritten when element is loaded below)
+            this.source = this.url;
+            this.sourceType = 'url';
+
+            this.loading = new Promise(function (resolve, reject) {
+                var ext = url.split('.').pop().toLowerCase();
+                var isVideo = ext === 'ogv' || ext === 'webm' || ext === 'mp4';
+
+                var element = undefined;
+                if (isVideo) {
+                    element = document.createElement('video');
+                    element.autoplay = true;
+
+                    element.muted = true; /* required for modern browsers to autoplay video */
+                    setTimeout(function () {
+                        element.play(); /* doesn't block promise but needs a more elegant solution */
+                    }, 1);
+
+                    options.filtering = 'nearest';
+                    // element.preload = 'auto';
+                    // element.style.display = 'none';
+                    // document.body.appendChild(element);
+                } else {
+                    element = new Image();
+                }
+
+                element.onload = function () {
+                    try {
+                        _this.setElement(element, options);
+                    } catch (e) {
+                        console.log('Texture \'' + _this.name + '\': failed to load url: \'' + _this.source + '\'', e, options);
+                    }
+                    resolve(_this);
+                };
+                element.onerror = function (e) {
+                    // Warn and resolve on error
+                    console.log('Texture \'' + _this.name + '\': failed to load url: \'' + _this.source + '\'', e, options);
+                    resolve(_this);
+                };
+
+                // Safari has a bug loading data-URL elements with CORS enabled, so it must be disabled in that case
+                // https://bugs.webkit.org/show_bug.cgi?id=123978
+                if (!(isSafari() && _this.source.slice(0, 5) === 'data:')) {
+                    element.crossOrigin = 'anonymous';
+                }
+
+                element.src = _this.source;
+                if (isVideo) {
+                    _this.setElement(element, options);
+                }
+            });
+            return this.loading;
+        }
+
+        // Sets texture to a raw image buffer
+
+    }, {
+        key: 'setData',
+        value: function setData(width, height, data) {
+            var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
+
+            this.width = width;
+            this.height = height;
+
+            this.source = data;
+            this.sourceType = 'data';
+
+            this.update(options);
+            this.setFiltering(options);
+
+            this.loading = Promise.resolve(this);
+            return this.loading;
+        }
+
+        // Sets the texture to track a element (canvas/image)
+
+    }, {
+        key: 'setElement',
+        value: function setElement(element, options) {
+            var _this2 = this;
+
+            var el = element;
+
+            // a string element is interpeted as a CSS selector
+            if (typeof element === 'string') {
+                element = document.querySelector(element);
+            }
+
+            if (element instanceof HTMLCanvasElement || element instanceof HTMLImageElement || element instanceof HTMLVideoElement) {
+                this.source = element;
+                this.sourceType = 'element';
+
+                if (element instanceof HTMLVideoElement) {
+                    this.width = this.source.videoWidth;
+                    this.height = this.source.videoHeight;
+                    element.addEventListener('canplaythrough', function () {
+                        _this2.intervalID = setInterval(function () {
+                            _this2.update(options);
+                        }, 15);
+                    }, true);
+                    element.addEventListener('ended', function () {
+                        element.currentTime = 0;
+                        element.play();
+                    }, true);
+                } else {
+                    this.update(options);
+                }
+                this.setFiltering(options);
+            } else {
+                var msg = 'the \'element\' parameter (`element: ' + JSON.stringify(el) + '`) must be a CSS ';
+                msg += 'selector string, or a <canvas>, <image> or <video> object';
+                console.log('Texture \'' + this.name + '\': ' + msg, options);
+            }
+
+            this.loading = Promise.resolve(this);
+            return this.loading;
+        }
+
+        // Uploads current image or buffer to the GPU (can be used to update animated textures on the fly)
+
+    }, {
+        key: 'update',
+        value: function update() {
+            var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+
+            if (!this.valid) {
+                return;
+            }
+
+            this.bind();
+            this.gl.pixelStorei(this.gl.UNPACK_FLIP_Y_WEBGL, options.UNPACK_FLIP_Y_WEBGL === false ? false : true);
+            this.gl.pixelStorei(this.gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, options.UNPACK_PREMULTIPLY_ALPHA_WEBGL || false);
+
+            // Image or Canvas element
+            if (this.sourceType === 'element' && (this.source instanceof HTMLCanvasElement || this.source instanceof HTMLVideoElement || this.source instanceof HTMLImageElement && this.source.complete)) {
+                if (this.source instanceof HTMLVideoElement) {
+                    this.width = this.source.videoWidth;
+                    this.height = this.source.videoHeight;
+                } else {
+                    this.width = this.source.width;
+                    this.height = this.source.height;
+                }
+                this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.source);
+            }
+            // Raw image buffer
+            else if (this.sourceType === 'data') {
+                    this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.width, this.height, 0, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.source);
+                }
+            this.trigger('loaded', this);
+        }
+
+        // Determines appropriate filtering mode
+
+    }, {
+        key: 'setFiltering',
+        value: function setFiltering() {
+            var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+
+            if (!this.valid) {
+                return;
+            }
+
+            this.powerOf2 = isPowerOf2(this.width) && isPowerOf2(this.height);
+            // let defualtFilter = (this.powerOf2 ? 'mipmap' : 'linear');
+            // this.filtering = options.filtering || defualtFilter;
+            this.filtering = options.filtering || 'linear';
+
+            var gl = this.gl;
+            this.bind();
+
+            // For power-of-2 textures, the following presets are available:
+            // mipmap: linear blend from nearest mip
+            // linear: linear blend from original image (no mips)
+            // nearest: nearest pixel from original image (no mips, 'blocky' look)
+            if (this.powerOf2) {
+                gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, options.TEXTURE_WRAP_S || gl.REPEAT);
+                gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, options.TEXTURE_WRAP_T || gl.REPEAT);
+
+                if (this.filtering === 'mipmap') {
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR); // TODO: use trilinear filtering by defualt instead?
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
+                    gl.generateMipmap(gl.TEXTURE_2D);
+                } else if (this.filtering === 'linear') {
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
+                } else if (this.filtering === 'nearest') {
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+                }
+            } else {
+                // WebGL has strict requirements on non-power-of-2 textures:
+                // No mipmaps and must clamp to edge
+                gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+                gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+
+                if (this.filtering === 'mipmap') {
+                    this.filtering = 'linear';
+                }
+
+                if (this.filtering === 'nearest') {
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+                } else {
+                    // default to linear for non-power-of-2 textures
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
+                }
+            }
+        }
+    }]);
+    return Texture;
+}();
+
+Texture.getMaxTextureSize = function (gl) {
+    return gl.getParameter(gl.MAX_TEXTURE_SIZE);
+};
+
+// Global set of textures, by name
+Texture.activeUnit = -1;
+
+/*
+The MIT License (MIT)
+
+Copyright (c) 2015 Patricio Gonzalez Vivo ( http://www.patriciogonzalezvivo.com )
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the 'Software'), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+var GlslCanvas = function () {
+    function GlslCanvas(canvas, contextOptions, options) {
+        var _this = this;
+
+        classCallCheck(this, GlslCanvas);
+
+        subscribeMixin$1(this);
+
+        contextOptions = contextOptions || {};
+        options = options || {};
+
+        if (canvas.hasAttribute('data-fullscreen') && (canvas.getAttribute('data-fullscreen') == "1" || canvas.getAttribute('data-fullscreen') == "true")) {
+            this.width = window.innerWidth;
+            this.height = window.innerHeight;
+            canvas.width = window.innerWidth;
+            canvas.height = window.innerHeight;
+        } else {
+            this.width = canvas.clientWidth;
+            this.height = canvas.clientHeight;
+        }
+
+        this.canvas = canvas;
+        this.gl = undefined;
+        this.deps = {};
+        this.program = undefined;
+        this.textures = {};
+        this.buffers = {};
+        this.uniforms = {};
+        this.vbo = {};
+        this.isValid = false;
+        this.animationFrameRequest = undefined;
+
+        this.BUFFER_COUNT = 0;
+        // this.TEXTURE_COUNT = 0;
+
+        this.vertexString = contextOptions.vertexString || '\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\nattribute vec2 a_position;\nattribute vec2 a_texcoord;\n\nvarying vec2 v_texcoord;\n\nvoid main() {\n    gl_Position = vec4(a_position, 0.0, 1.0);\n    v_texcoord = a_texcoord;\n}\n';
+        this.fragmentString = contextOptions.fragmentString || '\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\nvarying vec2 v_texcoord;\n\nvoid main(){\n    gl_FragColor = vec4(0.0);\n}\n';
+
+        // GL Context
+        var gl = setupWebGL(canvas, contextOptions, options.onError);
+        if (!gl) {
+            return;
+        }
+        this.gl = gl;
+        this.timeLoad = this.timePrev = performance.now();
+        this.timeDelta = 0.0;
+        this.forceRender = true;
+        this.paused = false;
+        this.realToCSSPixels = window.devicePixelRatio || 1;
+
+        // Allow alpha
+        canvas.style.backgroundColor = contextOptions.backgroundColor || 'rgba(1,1,1,0)';
+
+        // Load shader
+        if (canvas.hasAttribute('data-fragment')) {
+            this.fragmentString = canvas.getAttribute('data-fragment');
+        } else if (canvas.hasAttribute('data-fragment-url')) {
+            var source = canvas.getAttribute('data-fragment-url');
+            xhr.get(source, function (error, response, body) {
+                _this.load(body, _this.vertexString);
+            });
+        }
+
+        // Load shader
+        if (canvas.hasAttribute('data-vertex')) {
+            this.vertexString = canvas.getAttribute('data-vertex');
+        } else if (canvas.hasAttribute('data-vertex-url')) {
+            var _source = canvas.getAttribute('data-vertex-url');
+            xhr.get(_source, function (error, response, body) {
+                _this.load(_this.fragmentString, body);
+            });
+        }
+
+        this.load();
+
+        if (!this.program) {
+            return;
+        }
+
+        // Define Vertex buffer
+        var texCoordsLoc = gl.getAttribLocation(this.program, 'a_texcoord');
+        this.vbo.texCoords = gl.createBuffer();
+        this.gl.bindBuffer(gl.ARRAY_BUFFER, this.vbo.texCoords);
+        this.gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0]), gl.STATIC_DRAW);
+        this.gl.enableVertexAttribArray(texCoordsLoc);
+        this.gl.vertexAttribPointer(texCoordsLoc, 2, gl.FLOAT, false, 0, 0);
+
+        var verticesLoc = gl.getAttribLocation(this.program, 'a_position');
+        this.vbo.vertices = gl.createBuffer();
+        this.gl.bindBuffer(gl.ARRAY_BUFFER, this.vbo.vertices);
+        this.gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0]), gl.STATIC_DRAW);
+        this.gl.enableVertexAttribArray(verticesLoc);
+        this.gl.vertexAttribPointer(verticesLoc, 2, gl.FLOAT, false, 0, 0);
+
+        // load TEXTURES
+        if (canvas.hasAttribute('data-textures')) {
+            var imgList = canvas.getAttribute('data-textures').split(',');
+            for (var nImg in imgList) {
+                this.setUniform('u_tex' + nImg, imgList[nImg]);
+            }
+        }
+
+        // ========================== EVENTS
+        var mouse = {
+            x: 0,
+            y: 0
+        };
+        document.addEventListener('mousemove', function (e) {
+            mouse.x = e.clientX || e.pageX;
+            mouse.y = e.clientY || e.pageY;
+        }, false);
+
+        var sandbox = this;
+        function RenderLoop() {
+            if (sandbox.nMouse > 1) {
+                sandbox.setMouse(mouse);
+            }
+
+            if (sandbox.resize()) {
+                sandbox.forceRender = true;
+            }
+
+            sandbox.render();
+            sandbox.animationFrameRequest = window.requestAnimationFrame(RenderLoop);
+        }
+
+        // Start
+        this.setMouse({ x: 0, y: 0 });
+        RenderLoop();
+        return this;
+    }
+
+    createClass(GlslCanvas, [{
+        key: 'destroy',
+        value: function destroy() {
+            // Stop the animation
+            cancelAnimationFrame(this.animationFrameRequest);
+
+            this.animated = false;
+            this.isValid = false;
+            for (var tex in this.textures) {
+                if (tex.destroy) {
+                    tex.destroy();
+                }
+            }
+            this.textures = {};
+            for (var att in this.attribs) {
+                this.gl.deleteBuffer(this.attribs[att]);
+            }
+            this.gl.useProgram(null);
+            this.gl.deleteProgram(this.program);
+            for (var key in this.buffers) {
+                var buffer = this.buffers[key];
+                this.gl.deleteProgram(buffer.program);
+            }
+
+            this.program = null;
+            this.gl = null;
+        }
+    }, {
+        key: 'load',
+        value: function load(fragString, vertString) {
+            var _this2 = this;
+
+            // Load vertex shader if there is one
+            if (vertString) {
+                this.vertexString = vertString;
+            }
+
+            // Load fragment shader if there is one
+            if (fragString) {
+                this.fragmentString = fragString;
+            }
+
+            var lines = this.fragmentString.split(/\r?\n/);
+            this.fragmentString = "#define PLATFORM_WEBGL\n#line 0\n";
+
+            lines.forEach(function (line, i) {
+                var line_trim = line.trim();
+                if (line_trim.startsWith('#include \"lygia')) {
+                    var dep = line_trim.substring(15).replace(/\'|\"|\;|\s/g, '');
+                    if (dep.endsWith('glsl')) {
+                        if (_this2.deps[dep] === undefined) {
+                            var url = "https://lygia.xyz" + dep;
+                            _this2.deps[dep] = getFile(url);
+                        }
+                        _this2.fragmentString += _this2.deps[dep] + '\n#line ' + (i + 1) + '\n';
+                    }
+                } else _this2.fragmentString += line + '\n';
+            });
+
+            // console.log(this.fragmentString);
+
+            this.animated = false;
+            this.nDelta = (this.fragmentString.match(/u_delta/g) || []).length;
+            this.nTime = (this.fragmentString.match(/u_time/g) || []).length;
+            this.nDate = (this.fragmentString.match(/u_date/g) || []).length;
+            this.nMouse = (this.fragmentString.match(/u_mouse/g) || []).length;
+            this.animated = this.nDate > 1 || this.nTime > 1 || this.nMouse > 1;
+
+            var nTextures = this.fragmentString.search(/sampler2D/g);
+            if (nTextures) {
+                var _lines = this.fragmentString.split('\n');
+                for (var i = 0; i < _lines.length; i++) {
+                    var match = _lines[i].match(/uniform\s*sampler2D\s*([\w]*);\s*\/\/\s*([\w|\:\/\/|\.|\-|\_]*)/i);
+                    if (match) {
+                        var ext = match[2].split('.').pop().toLowerCase();
+                        if (match[1] && match[2] && (ext === 'jpg' || ext === 'jpeg' || ext === 'png' || ext === 'ogv' || ext === 'webm' || ext === 'mp4')) {
+                            this.setUniform(match[1], match[2]);
+                        }
+                    }
+                    var main = _lines[i].match(/\s*void\s*main\s*/g);
+                    if (main) {
+                        break;
+                    }
+                }
+            }
+
+            var vertexShader = createShader(this, this.vertexString, this.gl.VERTEX_SHADER);
+            var fragmentShader = createShader(this, this.fragmentString, this.gl.FRAGMENT_SHADER);
+
+            // If Fragment shader fails load a empty one to sign the error
+            if (!fragmentShader) {
+                fragmentShader = createShader(this, 'void main(){\n\tgl_FragColor = vec4(1.0);\n}', this.gl.FRAGMENT_SHADER);
+                this.isValid = false;
+            } else {
+                this.isValid = true;
+            }
+
+            // Create and use program
+            var program = createProgram(this, [vertexShader, fragmentShader]); //, [0,1],['a_texcoord','a_position']);
+            this.gl.useProgram(program);
+
+            // Delete shaders
+            // this.gl.detachShader(program, vertexShader);
+            // this.gl.detachShader(program, fragmentShader);
+            this.gl.deleteShader(vertexShader);
+            this.gl.deleteShader(fragmentShader);
+
+            this.program = program;
+            this.change = true;
+
+            this.BUFFER_COUNT = 0;
+            var buffers = this.getBuffers(this.fragmentString);
+            if (Object.keys(buffers).length) {
+                this.loadPrograms(buffers);
+            }
+            this.buffers = buffers;
+            this.texureIndex = this.BUFFER_COUNT;
+
+            // Trigger event
+            this.trigger('load', {});
+
+            this.forceRender = true;
+            this.render();
+        }
+    }, {
+        key: 'test',
+        value: function test(callback, fragString, vertString) {
+            // Thanks to @thespite for the help here
+            // https://www.khronos.org/registry/webgl/extensions/EXT_disjoint_timer_query/
+            var pre_test_vert = this.vertexString;
+            var pre_test_frag = this.fragmentString;
+            var pre_test_paused = this.paused;
+
+            var ext = this.gl.getExtension('EXT_disjoint_timer_query');
+            var query = ext.createQueryEXT();
+            var wasValid = this.isValid;
+
+            if (fragString || vertString) {
+                this.load(fragString, vertString);
+                wasValid = this.isValid;
+                this.forceRender = true;
+                this.render();
+            }
+
+            this.paused = true;
+            ext.beginQueryEXT(ext.TIME_ELAPSED_EXT, query);
+            this.forceRender = true;
+            this.render();
+            ext.endQueryEXT(ext.TIME_ELAPSED_EXT);
+
+            var sandbox = this;
+            function finishTest() {
+                // Revert changes... go back to normal
+                sandbox.paused = pre_test_paused;
+                if (fragString || vertString) {
+                    sandbox.load(pre_test_frag, pre_test_vert);
+                }
+            }
+            function waitForTest() {
+                sandbox.forceRender = true;
+                sandbox.render();
+                var available = ext.getQueryObjectEXT(query, ext.QUERY_RESULT_AVAILABLE_EXT);
+                var disjoint = sandbox.gl.getParameter(ext.GPU_DISJOINT_EXT);
+                if (available && !disjoint) {
+                    var ret = {
+                        wasValid: wasValid,
+                        frag: fragString || sandbox.fragmentString,
+                        vert: vertString || sandbox.vertexString,
+                        timeElapsedMs: ext.getQueryObjectEXT(query, ext.QUERY_RESULT_EXT) / 1000000.0
+                    };
+                    finishTest();
+                    callback(ret);
+                } else {
+                    window.requestAnimationFrame(waitForTest);
+                }
+            }
+            waitForTest();
+        }
+    }, {
+        key: 'loadTexture',
+        value: function loadTexture(name, urlElementOrData, options) {
+            var _this3 = this;
+
+            if (!options) {
+                options = {};
+            }
+
+            if (typeof urlElementOrData === 'string') {
+                options.url = urlElementOrData;
+            } else if ((typeof urlElementOrData === 'undefined' ? 'undefined' : _typeof(urlElementOrData)) === 'object' && urlElementOrData.data && urlElementOrData.width && urlElementOrData.height) {
+                options.data = urlElementOrData.data;
+                options.width = urlElementOrData.width;
+                options.height = urlElementOrData.height;
+            } else if ((typeof urlElementOrData === 'undefined' ? 'undefined' : _typeof(urlElementOrData)) === 'object') {
+                options.element = urlElementOrData;
+            }
+
+            if (this.textures[name]) {
+                if (this.textures[name]) {
+                    this.textures[name].load(options);
+                    this.textures[name].on('loaded', function (args) {
+                        _this3.forceRender = true;
+                    });
+                }
+            } else {
+                this.textures[name] = new Texture(this.gl, name, options);
+                this.textures[name].on('loaded', function (args) {
+                    _this3.forceRender = true;
+                });
+            }
+        }
+    }, {
+        key: 'refreshUniforms',
+        value: function refreshUniforms() {
+            this.uniforms = {};
+        }
+    }, {
+        key: 'setUniform',
+        value: function setUniform(name) {
+            var u = {};
+
+            for (var _len = arguments.length, value = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+                value[_key - 1] = arguments[_key];
+            }
+
+            u[name] = value;
+            this.setUniforms(u);
+        }
+    }, {
+        key: 'setUniforms',
+        value: function setUniforms(uniforms) {
+            var parsed = parseUniforms(uniforms);
+            // Set each uniform
+            for (var u in parsed) {
+                if (parsed[u].type === 'sampler2D') {
+                    // For textures, we need to track texture units, so we have a special setter
+                    // this.uniformTexture(parsed[u].name, parsed[u].value[0]);
+                    this.loadTexture(parsed[u].name, parsed[u].value[0]);
+                } else {
+                    this.uniform(parsed[u].method, parsed[u].type, parsed[u].name, parsed[u].value);
+                }
+            }
+            this.forceRender = true;
+        }
+    }, {
+        key: 'setMouse',
+        value: function setMouse(mouse) {
+            // set the mouse uniform
+            var rect = this.canvas.getBoundingClientRect();
+            if (mouse && mouse.x && mouse.x >= rect.left && mouse.x <= rect.right && mouse.y && mouse.y >= rect.top && mouse.y <= rect.bottom) {
+
+                var mouse_x = (mouse.x - rect.left) * this.realToCSSPixels;
+                var mouse_y = this.canvas.height - (mouse.y - rect.top) * this.realToCSSPixels;
+
+                this.uniform('2f', 'vec2', 'u_mouse', mouse_x, mouse_y);
+            }
+        }
+
+        // ex: program.uniform('3f', 'position', x, y, z);
+
+    }, {
+        key: 'uniform',
+        value: function uniform(method, type, name) {
+            // 'value' is a method-appropriate arguments list
+            this.uniforms[name] = this.uniforms[name] || {};
+            var uniform = this.uniforms[name];
+
+            for (var _len2 = arguments.length, value = Array(_len2 > 3 ? _len2 - 3 : 0), _key2 = 3; _key2 < _len2; _key2++) {
+                value[_key2 - 3] = arguments[_key2];
+            }
+
+            var change = isDiff(uniform.value, value);
+
+            // remember and keep track of uniforms location to save calls
+            if (change || this.change || !uniform.location || !uniform.value) {
+                uniform.name = name;
+                uniform.type = type;
+                uniform.value = value;
+                uniform.method = 'uniform' + method;
+                this.gl.useProgram(this.program);
+                uniform.location = this.gl.getUniformLocation(this.program, name);
+                this.gl[uniform.method].apply(this.gl, [uniform.location].concat(uniform.value));
+                // If there is change update and there is buffer update manually one by one
+                for (var key in this.buffers) {
+                    var buffer = this.buffers[key];
+                    this.gl.useProgram(buffer.program);
+                    var location = this.gl.getUniformLocation(buffer.program, name);
+                    this.gl[uniform.method].apply(this.gl, [location].concat(uniform.value));
+                }
+            }
+        }
+    }, {
+        key: 'uniformTexture',
+        value: function uniformTexture(name, texture, options) {
+            if (this.textures[name] === undefined) {
+                this.loadTexture(name, texture, options);
+            } else {
+                this.uniform('1i', 'sampler2D', name, this.texureIndex);
+
+                for (var key in this.buffers) {
+                    var buffer = this.buffers[key];
+                    this.gl.useProgram(buffer.program);
+                    this.gl.activeTexture(this.gl.TEXTURE0 + this.texureIndex);
+                    this.gl.bindTexture(this.gl.TEXTURE_2D, this.textures[name].texture);
+                }
+                this.gl.useProgram(this.program);
+                this.gl.activeTexture(this.gl.TEXTURE0 + this.texureIndex);
+                this.gl.bindTexture(this.gl.TEXTURE_2D, this.textures[name].texture);
+                this.uniform('2f', 'vec2', name + 'Resolution', this.textures[name].width, this.textures[name].height);
+            }
+        }
+    }, {
+        key: 'resize',
+        value: function resize() {
+            if (this.width !== this.canvas.clientWidth || this.height !== this.canvas.clientHeight) {
+                this.realToCSSPixels = window.devicePixelRatio || 1;
+
+                // Lookup the size the browser is displaying the canvas in CSS pixels
+                // and compute a size needed to make our drawingbuffer match it in
+                // device pixels.
+                var displayWidth = Math.floor(this.gl.canvas.clientWidth * this.realToCSSPixels);
+                var displayHeight = Math.floor(this.gl.canvas.clientHeight * this.realToCSSPixels);
+
+                // Check if the canvas is not the same size.
+                if (this.gl.canvas.width !== displayWidth || this.gl.canvas.height !== displayHeight) {
+                    // Make the canvas the same size
+                    this.gl.canvas.width = displayWidth;
+                    this.gl.canvas.height = displayHeight;
+                    // Set the viewport to match
+                    this.gl.viewport(0, 0, this.gl.canvas.width, this.gl.canvas.height);
+                }
+                this.width = this.canvas.clientWidth;
+                this.height = this.canvas.clientHeight;
+                this.resizeSwappableBuffers();
+                return true;
+            } else {
+                return false;
+            }
+        }
+    }, {
+        key: 'render',
+        value: function render() {
+            this.visible = isCanvasVisible(this.canvas);
+            if (this.forceRender || this.change || this.animated && this.visible && !this.paused) {
+
+                // Update Uniforms when are need
+                var date = new Date();
+                var now = performance.now();
+                this.timeDelta = (now - this.timePrev) / 1000.0;
+                this.timePrev = now;
+                if (this.nDelta > 1) {
+                    // set the delta time uniform
+                    this.uniform('1f', 'float', 'u_delta', this.timeDelta);
+                }
+
+                if (this.nTime > 1) {
+                    // set the elapsed time uniform
+                    this.uniform('1f', 'float', 'u_time', (now - this.timeLoad) / 1000.0);
+                }
+
+                if (this.nDate) {
+                    // Set date uniform: year/month/day/time_in_sec
+                    this.uniform('4f', 'float', 'u_date', date.getFullYear(), date.getMonth(), date.getDate(), date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds() * 0.001);
+                }
+
+                // set the resolution uniform
+                this.uniform('2f', 'vec2', 'u_resolution', this.canvas.width, this.canvas.height);
+
+                for (var key in this.buffers) {
+                    var buffer = this.buffers[key];
+                    this.uniform('1i', 'sampler2D', buffer.name, buffer.bundle.input.index);
+                }
+
+                this.texureIndex = this.BUFFER_COUNT;
+                for (var tex in this.textures) {
+                    this.uniformTexture(tex);
+                    this.texureIndex++;
+                }
+
+                this.renderPrograms();
+
+                // Trigger event
+                this.trigger('render', {});
+                this.change = false;
+                this.forceRender = false;
+            }
+        }
+    }, {
+        key: 'pause',
+        value: function pause() {
+            this.paused = true;
+        }
+    }, {
+        key: 'play',
+        value: function play() {
+            this.paused = false;
+        }
+
+        // render main and buffers programs
+
+    }, {
+        key: 'renderPrograms',
+        value: function renderPrograms() {
+            var gl = this.gl;
+            var W = gl.canvas.width;
+            var H = gl.canvas.height;
+
+            gl.viewport(0, 0, W, H);
+
+            for (var key in this.buffers) {
+                var buffer = this.buffers[key];
+                buffer.bundle.render(W, H, buffer.program, buffer.name);
+                gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+            }
+
+            gl.useProgram(this.program);
+            gl.drawArrays(gl.TRIANGLES, 0, 6);
+        }
+
+        // parse input strings
+
+    }, {
+        key: 'getBuffers',
+        value: function getBuffers(fragString) {
+            var buffers = {};
+            if (fragString) {
+                fragString.replace(/(?:^\s*)((?:#if|#elif)(?:\s*)(defined\s*\(\s*BUFFER_)(\d+)(?:\s*\))|(?:#ifdef)(?:\s*BUFFER_)(\d+)(?:\s*))/gm, function () {
+                    var i = arguments[3] || arguments[4];
+                    buffers['u_buffer' + i] = {
+                        fragment: '#define BUFFER_' + i + '\n' + fragString
+                    };
+                });
+            }
+            return buffers;
+        }
+
+        // load buffers programs
+
+    }, {
+        key: 'loadPrograms',
+        value: function loadPrograms(buffers) {
+            var glsl = this;
+            var gl = this.gl;
+            var vertex = createShader(glsl, glsl.vertexString, gl.VERTEX_SHADER);
+            for (var key in buffers) {
+                var buffer = buffers[key];
+                var fragment = createShader(glsl, buffer.fragment, gl.FRAGMENT_SHADER, 1);
+                if (!fragment) {
+                    fragment = createShader(glsl, 'void main(){\n\tgl_FragColor = vec4(1.0);\n}', gl.FRAGMENT_SHADER);
+                    glsl.isValid = false;
+                } else {
+                    glsl.isValid = true;
+                }
+                var program = createProgram(glsl, [vertex, fragment]);
+                buffer.name = key;
+                buffer.program = program;
+                buffer.bundle = glsl.createSwappableBuffer(glsl.canvas.width, glsl.canvas.height, program);
+                gl.deleteShader(fragment);
+            }
+            gl.deleteShader(vertex);
+        }
+
+        // create an input / output swappable buffer
+
+    }, {
+        key: 'createSwappableBuffer',
+        value: function createSwappableBuffer(W, H, program) {
+            var input = this.createBuffer(W, H, program);
+            var output = this.createBuffer(W, H, program);
+            var gl = this.gl;
+            return {
+                input: input,
+                output: output,
+                swap: function swap() {
+                    var temp = input;
+                    input = output;
+                    output = temp;
+                    this.input = input;
+                    this.output = output;
+                },
+                render: function render(W, H, program, name) {
+                    gl.useProgram(program);
+                    gl.viewport(0, 0, W, H);
+                    gl.bindFramebuffer(gl.FRAMEBUFFER, this.input.buffer);
+                    gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, this.output.texture, 0);
+                    gl.drawArrays(gl.TRIANGLES, 0, 6);
+                    this.swap();
+                },
+                resize: function resize(W, H, program, name) {
+                    gl.useProgram(program);
+                    gl.viewport(0, 0, W, H);
+                    this.input.resize(W, H);
+                    this.output.resize(W, H);
+                }
+            };
+        }
+
+        // create a buffers
+
+    }, {
+        key: 'createBuffer',
+        value: function createBuffer(W, H, program) {
+            var gl = this.gl;
+            var index = this.BUFFER_COUNT;
+            this.BUFFER_COUNT += 2;
+            gl.getExtension('OES_texture_float');
+            var texture = gl.createTexture();
+            gl.activeTexture(gl.TEXTURE0 + index);
+            gl.bindTexture(gl.TEXTURE_2D, texture);
+            gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, W, H, 0, gl.RGBA, gl.FLOAT, null);
+            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+            var buffer = gl.createFramebuffer();
+            return {
+                index: index,
+                texture: texture,
+                buffer: buffer,
+                W: W,
+                H: H,
+                resize: function resize(W, H) {
+                    gl.bindFramebuffer(gl.FRAMEBUFFER, buffer);
+                    var minW = Math.min(W, this.W);
+                    var minH = Math.min(H, this.H);
+                    var pixels = new Float32Array(minW * minH * 4);
+                    gl.readPixels(0, 0, minW, minH, gl.RGBA, gl.FLOAT, pixels);
+                    gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+                    var newIndex = index + 1;
+                    var newTexture = gl.createTexture();
+                    gl.activeTexture(gl.TEXTURE0 + newIndex);
+                    gl.bindTexture(gl.TEXTURE_2D, newTexture);
+                    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, W, H, 0, gl.RGBA, gl.FLOAT, null);
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+                    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+                    gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, minW, minH, gl.RGBA, gl.FLOAT, pixels);
+                    var newBuffer = gl.createFramebuffer();
+                    gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+                    gl.deleteTexture(texture);
+                    gl.activeTexture(gl.TEXTURE0 + index);
+                    gl.bindTexture(gl.TEXTURE_2D, newTexture);
+                    index = this.index = index;
+                    texture = this.texture = newTexture;
+                    buffer = this.buffer = newBuffer;
+                    this.W = W;
+                    this.H = H;
+                }
+            };
+        }
+
+        // resize buffers on canvas resize
+        // consider applying a throttle of 50 ms on canvas resize
+        // to avoid requestAnimationFrame and Gl violations
+
+    }, {
+        key: 'resizeSwappableBuffers',
+        value: function resizeSwappableBuffers() {
+            var gl = this.gl;
+            var W = gl.canvas.width,
+                H = gl.canvas.height;
+            gl.viewport(0, 0, W, H);
+            for (var key in this.buffers) {
+                var buffer = this.buffers[key];
+                buffer.bundle.resize(W, H, buffer.program, buffer.name);
+            }
+            gl.useProgram(this.program);
+        }
+    }, {
+        key: 'version',
+        value: function version() {
+            return '0.1.7';
+        }
+    }]);
+    return GlslCanvas;
+}();
+
+function loadAllGlslCanvas() {
+    var list = document.getElementsByClassName('glslCanvas');
+    if (list.length > 0) {
+        window.glslCanvases = [];
+        for (var i = 0; i < list.length; i++) {
+            var sandbox = new GlslCanvas(list[i]);
+            if (sandbox.isValid) {
+                window.glslCanvases.push(sandbox);
+            }
+        }
+    }
+}
+
+window.addEventListener('load', function () {
+    loadAllGlslCanvas();
+});
+
+return GlslCanvas;
+
+})));
-- 
cgit v1.3.1